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Swema Air 300 英文使用说明书


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Contents
Contents ....................................................................................................... 1 Points to note before starting ........................................................................ 4 The different menus used in SwemaAir 300 .................................................. 5 Key functions in the different menus............................................................. 6 The different programs used in SwemaAir 300 (MODE) ................................. 7 Instrument SwemaAir 300............................................................................. 8 Outputs and connections .............................................................................. 9 Display ....................................................................................................... 10 Automatic shut down.................................................................................. 10 Battery replacement in SwemaAir 300......................................................... 10 Air velocity sensor SWA 31.......................................................................... 11 Here’s how it works: (mode AP).................................................................... 12 You can now start measuring...................................................................... 12 Notebook..................................................................................................... 14 Printing out a note from the notebook ......................................................... 14 Printing out the whole report ...................................................................... 15 Storing individual measuring points in the notebook................................... 16 Filing system used in the notebook ............................................................. 16 You select the program via the program menu (MODE) ................................ 17 APF............................................................................................................. 17 You set the following via the parameter menu: ..................................... 18 Selecting area in the case of circular standard ducts............................ 19 Selecting unit, l/s or m3/h .................................................................. 19 Selecting area for other circular ducts ................................................. 20 Selecting area for rectangular ducts..................................................... 20 Selecting an optional area.................................................................... 21 Reminder list for APF mode ................................................................. 22 AS .............................................................................................................. 23 How the time constant works............................................................... 23 Measuring with AS mode ..................................................................... 23 ASF ............................................................................................................ 24 You set the following in the parameter menu: ...................................... 24 Measuring with ASF mode ................................................................... 24 Datalogger................................................................................................... 25 How to enter the LOG and LOGP modes ...................................................... 25 LOG............................................................................................................ 26 Entering readings manually in the LOG mode...................................... 27 LOGP .......................................................................................................... 27 Logbook ...................................................................................................... 29

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Logbook/notebook without sensor .............................................................. 29 Printing out readings .................................................................................. 29 Deleting logged readings ............................................................................. 29 Some help functions in LOG and LOGP ....................................................... 30 Temperature SWA 25 / 53 / SWT 315 / 215 / 221....................................... 31 Selecting mode............................................................................................ 31 Selecting time constant ............................................................................... 31 Measuring with temperature sensors .......................................................... 31 Humidity measurement SWA 11-16, Hygroclip ............................................ 32 Draught probe SWA 03................................................................................. 33 Selecting time interval in CO mode.............................................................. 33 Measuring with the Draught probe in CO mode........................................... 33 AS mode ..................................................................................................... 34 Draught rating, DR ..................................................................................... 34 Differential pressure probes SWA10, SWA 07 ............................................... 35 Getting started............................................................................................ 35 SWA 10 with SAFE...................................................................................... 35 SWA 10 with FAST ...................................................................................... 35 Selecting SAFE or FAST .............................................................................. 36 Advice for accurate measurments................................................................ 36 Selecting mode............................................................................................ 36 Measuring with the Pitot static tube in AP mode ......................................... 36 APF............................................................................................................. 37 dPF............................................................................................................. 37 Measuring the flow in ducts ........................................................................ 39 Recommended positions of measuring points .............................................. 40 SwemaFlow 125 flow capture....................................................................... 41 The Flow capture key .................................................................................. 41 How you measure ....................................................................................... 41 Measuring program AF (Average Flow)......................................................... 41 Measuring program BP (Backpressure)........................................................ 42 Measuring advice ........................................................................................ 46 Stabelizing the air flow ................................................................................ 47 Atmospheric pressure ................................................................................. 47 Battery ....................................................................................................... 47 SwemaFlow 65 flow capture ........................................................................ 48 How you measure in measuring program AF (Average Flow) ........................ 48 Change time constant, measuring time or unit............................................ 49 Battery ....................................................................................................... 49 Measuring CO2............................................................................................. 50 SwemaTwin ................................................................................................. 51 Balancing a ventilation system according to the Proportional method: ......... 51

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SETUP menu ............................................................................................... 52 Checking the zero point on the air velocity probe SWA 31 and the Draught probe SWA 03. ............................................................................................. 54 Calibration protocol .................................................................................... 55 How to transfer data from SwemaAir 300 to Windows.................................. 56 Windows 3.11 ............................................................................................. 56 WINDOWS 95, 98 / NT ............................................................................... 57 Set-up ................................................................................................. 57 Transmitting by storing in a file. (recommended) ......................................... 58 Transmitting without storing in a File .................................................. 58 Data cable running to the PC ...................................................................... 59 DPU-201 printer .......................................................................................... 60 Mains connection........................................................................................ 60 Battery charging ......................................................................................... 60 Inserting new paper .................................................................................... 60 DIP switches ............................................................................................... 60 Connecting printer to SwemaAir 300........................................................... 60 Technical data............................................................................................. 61 General....................................................................................................... 61 SwemaAir 300 instrument: ......................................................................... 61 Draught probe, SWA 03: ............................................................................. 61 Air velocity probe, SWA 31: ......................................................................... 62 Pressure probe SWA 10: SWA 07:.............................................................. 62 Temperature probe, SWA 25: ...................................................................... 62 SwemaFlow 125: ......................................................................................... 63 SwemaFlow 65:........................................................................................... 63 CO2 Cable to Airtest: ................................................................................... 64 Humidity and Temperature SWA 11-14 + cable and Hygroclip + cable: ........ 64 Problem Solving .......................................................................................... 64 Guarantee conditions .................................................................................. 65 Index........................................................................................................... 66

Version 0301-3.30-1

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Points to note before starting
The SwemaAir 300 is a multi-purpose instrument for measuring air velocities, air volumes, air humidity and temperatures. SwemaAir 300 has a high calculation capacity, and you can store individual or calculated measurement results in an extra memory called the notebook. Measurement reports can be outputted to Windows or printed directly on a printer from the extra memory. The SwemaAir 300 has a number of different programs, each adapted to the measurement you are to perform. In this way you keep all the options separate. We recommend that you learn how to use one program at a time. You will then see the pattern, and learning will become easier. The SwemaAir 300 has completely replaceable probes which are each individually calibrated. If you have replaced a probe or connected it for the first time, the instrument always selects the program which is standard for the connected probe. In addition, the SwemaAir 300 reads in the calibration and only makes available the programs which are relevant to that particular type of probe. If you do not have a sensor connected, you will be sent to the notebook or logbook (more about this later). If you have simply switched off the instrument and want to start working again, you will return to the program you were last using.

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The different menus used in SwemaAir 300

SETUP MENU
Here you change the default settings for items such as: Air pressure, temp., humidity, number of decimals, language etc. MODE MODE MODE extended

PROGRAM MENU
Here, you select the measurement program: AP, APF, AS, ASF, dPF, CO, LOG, LOGP. AF, BP

MODE

MEASUREMENT MODE
MODE MODE AVG AVG

NOTEBOOK AND LOGBOK
Here, you can output, print and/or view saved readings.

PARAMETER MENU WORKING MEMORY
The readings that you collect are kept here before you save them. Here, you change/select time constants, time intervals, areas, Units of measure, correction, factors, measuring time, etc.

MODE

MODE

FILE MENU
Here, you select the desired file.

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Key functions in the different menus
KEYS:
ON OFF

MEASUREMENT MODE
Off

PARAMETER MENU
Off Off

NOTEBOOK AND LOGBOK

PROGRAM MENU
Off Off

SETUP MENU

How much memory remains? MAX View max value in working memory Which file is open? MIN View min value in working memory View/scroll in working memory

Increase current parameter

SHORT: Scroll forward 1 step LONG: Scroll forward in 10-step jump

Scroll forward

Scroll forward Change numerical value in opened unit of measure

Decrease current parameter

SHORT: Scroll backward 1 Scroll backward Scroll backward step Change numerical value in opened LONG: Scroll backward in unit of measure 10-step jump Read settings and readings Not used Not used

Not used

AVG

+ :Go to notebook or logbook MODE: Go to SETUP menu +MIN: Clears the following: SWA 07 and SWA 650 +NOTE/PRINT: Closes an open file

Not used

Exit from the notebook

Not used

Not used

Without sensor: MODE: Go to SETUP menu

CLEAR

Clears the contents of Provides default the working memory (if value of current parameter any), otherwise displays the currently active program

SHORT: Passivate report Assign default in the notebook (erase last) program to current sensor LONG: System asks if you want to erase notebook. Ono more long depression causes the notebook to be erased FILE MENU: LONG: Erase the last file

Go to first unit of measure in SETUP menu

After ENTER: Provides default setting of current unit of measure

SHORT: Go to parameter menu MODE LONG: Go to program mode

Step forward in menu

Scroll back and forth in file Exit from menu program mode LONG without sensor: Change to notebook/ logbook

Exit from setup mode

Store readings obtained from working memory in the notebook or logbook NOTE PRINT

Not used

SHORT: Print desired Not used report, short again interrupt printout LONG: Print all files FILE MENU: Print current file

Not used

Store readings in the working memory ENTER

Show how many readings Open certain are present in notebook parameters for changing and proceed to next digit FILE MENU: Show how many readings are present in the current file

Not used

Open current unit of measure for changing and moving between digit positions

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The different programs used in SwemaAir 300 (MODE)
AP (Average Point). Measured values are saved with NOTE/PRINT and averages are formed by storing values with ENTER. AP mode is used for measuring air velocity , flow, temperature, CO2, moisture and pressure. APF (Average Point Flow). Same as AP, but the SwemaAir 300 calculates the flow in l/s or m3/h. You enter the area in cm2. If you choose to indicate the height and width or diameter of the duct, the SwemaAir 300 calculates the effective area = the actual area less the duct coefficient k2 in accordance with the recommended measurement methods. Use the APF mode for measuring the flow in ducts and the flow through certain grilles. AS (Auto Sampling). The SwemaAir 300 automatically collects measured values at the interval set by the time constant. Use AS mode for example if you want to measure average velocity, max, min, temperature and standard deviation (turbulence) at a point. ASF (Auto Sampling Flow). Same as AS, but the SwemaAir 300 calculates the flow in l/s or m3/h. You enter the area in cm2 or state height and width, and the SwemaAir 300 then calculates the area without reduction. Use ASF mode for example to measure the flow and air velocity in fume cupboards, intake grilles and flat devices. ASF is not intended for measuring in ducts, and diameters and duct coefficient are therefore omitted. LOG/LOGP Collects readings at user-selectable intervals and time constant. Use LOG/LOGP mode to measure throughout longer time intervals (Ex: variations of air velocity and temperature throughout a 24-hour.). LOG collects readings made at discrete testpoints and LOGP series of readings presented in a report as max, min, avg and the like. CO (Comfort). Only available with the omnidirectional draught probe SWA 03 connected. CO mode measures average velocity and temperature and standard deviation over three minutes, (period of time - selectable.) After storage and on printing out, the SwemaAir 300 calculates the DR (Draught Rating). The DR indicates as a percentage how many people find the air velocity unpleasant. The DR is based on experiments conducted at the Technical University in Copenhagen, directed by Professor Fanger. DR is included as a measure of undesirable air movements in the ISO 7730 standard adopted for indoor climates. dPF (differential Pressure Flow). Only available with SwemaMan, SWA 07 and SWA10. The flow in the measurement of pressure drop across devices is directly obtained in l/s or m3/h. You enter the k factor, and the SwemaAir 300 calculates the air flow according to the formula: q = k ?p AF (Average Flow) Only available with SwemaFlow 125 and 65. Average Flow is calculated during selectable measuring time and presented on the display. BP (Back pressure) Only available with SwemaFlow 125. This mode is for measurement over devices with low pressure drop and high flows. BP mode calculates the real flow without the capture over the device.

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Instrument SwemaAir 300

Display Air velocity sensor SWA 31
m/s

I 2.5 8
2 3.0
MAX MIN

°C

ON OFF

AVG

CLEAR

MODE

NOTE PRINT

ENTER

Keypad

Battery holder

9

Outputs and connections 1 2 3 4

REC

1. 12-pin socket, output to PC-printer etc. RS232.
j k h

m
a l b d c

g
f e

Pin a b c d e g j k l m

Function + External power supply 10 - 16 V DC, input RxD, Recieve data input TxD, Transmit Data output CTS, Clear to send input (from printer DTR - Data terminal Ready) RTS, Ready to Send (not used) output Earth + 5 V, output - 5 V, output Analog output velocity 100 mV/m/s 1) Analog output temperature 10 mV/°C
1) 1 V/100 %RF, 1 mV/Pa and for mode CO 1 V/m/s

2. External power supply 10 - 16 V DC,
?2.5 mm telephone-type plug.

3. 8-pin socket for probe, DIN 45326 4. Arrow indicates calibrated direction of flow

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Display
The SwemaAir 300 has a double display so that both air velocity and temperature or other combinations such as relative humidity and temperature or pressure and flow can be shown simultaneously. As well as measured values and type, you are given guidance on what to do, e.g.: "set ? cm", "set interval sec".

m AVERAGE

m/s

2.4 5
set time const.

0.5
sec.

2 7.7 °C
Automatic shut down
The SwemaAir 300 shuts down automatically after 10 minutes when no buttons have been pressed. A short sound is heard when shutting down. The 10 minutes time can only be changed by Swema. SwemaTwin battery pack or a 220 volts adapter (part nr. 310.700) disconnects the battery. Automatic shut down is also disconnected.

Battery replacement in SwemaAir 300
The Battery symbol is lightened when the battery soon needs to be replaced.

DISCHARGE.

ATTENTION! THE INSIDE OF THE INSTRUMENT IS SENSITIVE FOR ELECTROSTATIC

Switch off your SwemaAir 300 and loosen the two screws at the rear end marked "BATTERY". Pull out the battery and loosen the battery connector. Insert a new 9 V alkaline battery and screw the SwemaAir 300 together. IMPORTANT: Do not use pyrolusite batteries in your SwemaAir 300 since they may damage the instrument in the event of leakage.

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Air velocity sensor SWA 31
Extend the probe to the desired length. Both holes must be clear for air to pass through. AIR VELOCITY SENSOR (THERMISTOR) DO NOT TOUCH THE THERMISTOR! The sensor must be replaced if it breaks. The SwemaAir 300 has individually calibrated probes. For repair, it is sufficient to send in the probe. TEMPERATURE SENSOR Ni 100 Check that the sensors are free of dust. Blow carefully! Note: Turn the arrow so that the market on the bottom part of the telescope stem points in the same direction as the arrow. Do not pull on the cable when retracting the telescope stem!
DIRECTIONAL DEPENDENCE OF SwemaAir 300
10 ERROR IN % OF READ-OFF VALUE

Air velocity

Temp.

8

Air flow

6

4

2 % -30 -20 -10 0 10 ANGLE IN DEGREES 20 30 40

0 -40

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Here’s how it works: (mode AP)
Connect e.g. the air velocity probe and press ON. It may take a few seconds for the SwemaAir 300 to read in the calibration. The large digits indicate the battery voltage in volts, "V". ”mode AP” means that the Average Point program has been read in. (The average of a number of points).
mode

V

8.4
AP
m/s m

After a few seconds you will hear a longer tone, and the SwemaAir 300 is in the measuring position. The large digits show the air velocity, the smaller ones the temperature. If the probe does not show zero, see later (page 48). If you have not had time to read the first screen, switch off and on again.

0.0 0
2 5.6 °C

To check the time constant, i.e. the damping or inertia of the instrument, briefly press MODE. You have now arrived at the parameter menu. You can then change the standard value of 2 seconds to the value you want. Use MAX (arrow up) to increase and MIN (arrow down) to decrease. If you want to restore the default value, press CLEAR. You can now return to the measurement mode by pressing MODE briefly.

0.5
sec. set time const.

You can now start measuring
Let us perform a measurement. Imagine you want the average of the air velocity at a number of points. You collect values by pressing ENTER. You see the average and the number of points, "no.", for a short time. Your readings are now in the working memory.

m AVERAGE

m/s

2.2 5
no.

I2

13

If you want to see the average value and the average temperature, press AVG. Continue by pressing AVG once more. You will see the average value and the number of measuring points for a short time, and will then return to the measuring position.

m AVERAGE

m/s

2.2 5
2 7.7 °C
m MAX m/s

If you press MAX, you will see the maximum air velocity and the maximum temperature. If you press MAX once more, the SwemaAir 300 will show the average value and the number of measuring points for a short time, and you will then return to the measuring position. If you press MIN, you will see the minimum air velocity and temperature. To return, press MIN once more. You will see the average velocity and the number of measuring points for a short time, and will then return to the measuring position.

3.5 I
2 7.3 °C

When you have collected measuring points and the SwemaAir 300 has calculated the average value of air velocity and temperature, you have three options: 1. To add more measuring points, press ENTER. 2. To perform a new measurements, press CLEAR. You will hear from the signal (falling tone) that you have cleared the working memory. If the memory was already empty, you will hear a regular beep, and information indicating the currently selected program will appear on the display. If you want to check that the working memory is empty and that the SwemaAir 300 is ready for new measurements, you can press AVG. If no display appears and there is no sound, it is ready for new measurements. 3. To save the measurement, enter it in the notebook!

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Notebook
Press NOTE/PRINT. The measurement is saved in the notebook. You will see a number, "no.". This is all you need to remember. The notebook is an extra memory which is not erased if you switch off the SwemaAir 300 or change the battery. This memory is also used in LOG and LOGP modes, where it is called the logbook. The letter "m" always appears in the upper left-hand corner of the display when there is something in the notebook or logbook. In the notebook there is place for 200 notes with 4 pairs of measurement in each note. (800 with fully expanded memory.) To enter the notebook, press (exit by pressing once). twice in succession
m
note

m
note

no.

2

You will move directly to note no. 2 which was the last measurement you saved. If the word "SEE" and "m" in the top left-hand corner are missing, the notebook is empty. appears in the top lefthand corner when you are in the notebook. If you want to see what is stored under note no. 2, press AVG. You will first see the mode, in this case AP, the second press on AVG displays the time constant, the third shows average velocity and average temperature, the fourth gives MAX, the fifth MIN and the number of measuring points, and with the sixth press on AVG you move to note no. 3. If there is nothing else in the notebook, you will return to no. 2.

SEE
no.

2
m/s MIN

m
note

0.5 8
no.

I2

Printing out a note from the notebook
Assume you want to print out the contents of note no. 2. Connect a printer and enter the notebook by pressing twice. Press MAX briefly to step forward one note at a time, or press MAX for a longer time to move forward 10 notes at a time. Press MIN to move one note back. A long press moves you to the nearest note with contents and then 10 notes at a time. You can be anywhere in the note if you want to print it out.
m
note

SEE
no.

2

15

Press NOTE/PRINT briefly to start the printout. You will receive a report which appears as follows: After no. 2 you will see a dotted line, where you note where the measurement was performed. If want to return to the measuring position, press .

No 2 ..................... SWA 31 S/N: 103 Mode AP, TC 0.5 sec Average velocity 3.06 m/s Max 3.32 m/s Min 2.91 m/s Average temp. 26.0 dgC Measurements 6 st

Printing out the whole report
If you want to print out a report, i.e. everything in the notebook, press NOTE/ PRINT and hold the key down until the printer starts to print. The printout will then appear as follows: In AP MODE with the air velocity probe, SwemaAir 300 prints out what you see when you look into the notebook. In other cases SwemaAir 300 also makes some calculations on printing out, e.g. with the humidity and temperature probe the dew point and water content are calculated. At the bottom are the entered constants. These are values which SwemaAir 300 needs in order to be able to calculate the density of the air. These values can be changed in a special SETUP mode (more about this later). If you want to omit one or more reports when outputting to WINDOWS or printing to a printer you can passivate the desired report(s). To do this, you proceed to the report in question using MAX or MIN and then press CLEAR briefly. The word "SEE" will then be replaced with "PASS". Pressing CLEAR a second time will re-activate the report. If, on the other hand, you are at the last report and press CLEAR, it will be irretrievably erased.
No 1 ...................... SWA 31 S/N: 103 Mode AP, TC 0.5 sec Average velocity 3.23 m/s Max 3.59 m/s Min 2.99 m/s Average temp. 26.0 dgC Measurements 6 st No 2 ..................... SWA 31 S/N: 103 Mode AP, TC 0.5 sec Average velocity 3.06 m/s Max 3.32 m/s Min 2.91 m/s Average temp. 26.0 dgC Measurements 6 st Setup values 1013 hPa, 50 %RH, 20.0 dgC Date ...................... Signature .................

As an alternative to the standard configuration ("Shrt") used for output from the AP and APF mode, you can obtain a longer report, namely "Long". Here every testpoint is printed as illustrated at right. You can change from the type of report, i.e No 2 ...................... "Shrt" to "Long" and vice versa, in the SETUP SWA 31 S/N: 103 menu. Mode AP, TC 0.5 sec When a printout has been made, the values are left in the notebook. To clear them, use CLEAR. The note you are in is erased if you press once. A long press on CLEAR causes the question "note clear?" to be displayed. If you want to clear the whole notebook, perform one more long press.
Average velocity Average temp. No 1 2 3 4 m/s 0.468 0.448 0.427 0.424 3.06 m/s 26.0 dgC

dgC 27.94 27.94 28.00 28.01

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Storing individual measuring points in the notebook
Press NOTE/PRINT if you want to save a measured value which is on the display. The printout will look like this:

No 3 ..................... SWA 31 S/N: 103 Mode AP, TC 0.5 sec Velocity 3.65 m/s Temperature 25.9 dgC

Filing system used in the notebook
In the notebook, reports can be stored in different groups called files. This helps you to distinguish readings taken in different places (on the different floors of a building for example). Normally, all reports are stored in the first file (File 1). To start with a new file, you must first close the first file. A file cannot be opened again after you have closed no. it. You can check to see whether or not you have a file open by pressing MIN in the measurement mode. If a file is open, its number will appear on the display. The only way you can close a file is to press and then NOTE/PRINT while in the measurement mode, whereupon the number of the file you closed will appear on the display. (If you turn off the instrument while a file is open, it will still be open when you turn the instrument on again.)

F ILE
I

As you continue to take readings, the new reports will be entered into file No. 2. If you want to view your readings, you can enter m the notebook in the usual way by pressing twice, whereupon you will see only the reports located in the file that is currently open. If you want to view the reports in any other file, you must first change to the desired file via the file menu. You can proceed to the file menu by pressing MODE. The set letter "n" will now appear on the display along with a digit and the word "FILE". "n" stands for "notebook" and tells you that you ar in the notebook. The digit is the number of the file that is currently open. Using MAX and MIN, you can scroll among the files that you have used. When you have reached the file you want to view, press MODE again and you will be returned to the notebook where you can view the reports in the file you have selected.

N

2

F ILE

You can erase the last file in the notebook by proceeding to this file in the file menu and then pressing CLEAR for a long interval.

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You select the program via the program menu (MODE)
Pressing MODE for a long interval takes you to the program menu:

m

AP
set mode

m

Press MAX or MIN to page between the modes (programs) which are available with the type of probe connected. When you have reached the desired program, press MODE to return to the measurement mode.
set mode

AS
m

APF
If you are in the measuring position, you can change mode by a long press on MODE. (Keep MODE pressed until you see "set mode", e.g. AP). You can then page to APF with MAX or MIN. Select APF mode by pressing MODE. You are then back in the measuring position.

APF
set mode

m

m/s

If you are uncertain what mode you have ended up in, just press CLEAR and the display will show the current mode for a few seconds and then return to the measuring position.

0.0 0
2 6.3 °C

18

You set the following via the parameter menu:
Time constant. Diameter, height x width or area. Units, l/s or m3/h. To set the time constant in mode APF, proceed in the same way as in AP mode, briefly press MODE. You can change it with MAX or MIN. When you are in position to select area, three different pictures can appear on the display, A, B or C, depending on what you were last using. The last setting is left in most cases.

I
set time const. sec

I 6.0
? set cm area set

4 0.0
cm set area

I234
cm
2

H
B

A

C

When you see any of pictures A, B or C, you can page between the options with MAX or MIN. Assume it was A. MAX >---------------------->---------------------->----------------------> etc. etc . <---------------------<----------------------<----------------------< MIN set ? 10.0 cm, set ? 25.0 cm, set ? 63.0 cm, set area 193 cm2, set ? 12.5 cm, set ? 31.5 cm, set ? 80.0 cm, set ? 16.0 cm, set ? 40.0 cm, set ?100.0 cm,

set ? 8.0 cm, set ? 20.0 cm, set ? 50.0 cm, set ? 125.0 cm,

set area H ---- cm.

As you can see, you can step forward between the diameters of the most common standard ducts, and you then come to "set area 193 cm2", which is

19

the effective area of duct diameter 16.0 cm. (If you had come from C, "set area 1234 cm2 would have appeared). After "set area 193 cm2" you come to "set area H ---- cm". There is nothing here as you came from A. (If you had come from B, "set area H 40 cm" would have appeared). If you press MAX once more, you will come to "set ? 8.0 cm" etc.

Selecting area in the case of circular standard ducts
Move to the desired diameter by pressing MAX or MIN. You will soon learn the fastest way.
set

3 I.5
? cm

Press MODE, and you will see the area. The SwemaAir 300 has made the following calculation (only in APF - mode): effective area = d2 π ? k2 4

k2 is the duct factor and is taken from Methods for measuring air flow in ventilation systems, by the Nordic Ventilation Group and the Building Research Council,1998, ISBN 91-540-5827-9. d ≤ 16.0 cm --> k2 = 0.96 20.0 < d ≤ 40.0 cm --> k2 = 0.97 50.0 < d < 125.0 cm --> k2 = 0.98

756
set area cm
2

Selecting unit, l/s or m /h
You have selected the diameter and see area. Press MODE once more. Press MAX or MIN to alternate between l/s and m3/h. All printouts are made in the unit you last selected. This means that you can, for example, perform the measurement in l/s and nevertheless obtain the printout in m3/h.
set

3

m3 / h

20

m

m/s

After pressing MODE once more, you are in the measuring position. If you want to check the setting, you can press MODE repeatedly. You will then see in succession: time constant, diameter, effective area and unit, and will then return to the measuring position. If you now wish to start measuring, you can skip to "Measuring the flow in ducts" (page 39).

0.0 0
2 6.3 °C

Selecting area for other circular ducts
You are in APF mode and the display shows measuring position. If you press MODE twice, you will obtain one of screens A, B or C. Page with MAX or MIN to a diameter close to the one you have. Press ENTER and the first digit will start to flash.
set

0 I60
o
cm

You can now change the flashing digit, increasing with MAX and decreasing with MIN, and move to the next digit by pressing ENTER. Continue to the next digit. When you are satisfied, select with MODE. The diameter is limited to values between 1.0 and 288.0 cm. The area is calculated in the same way as for standard ducts, the k2 duct factor being included in the calculation. When you have selected the area, select unit l/s or m3/s with MODE, and the SwemaAir 300 will be in the measuring position. If you want to measure, see under "Measuring the flow in ducts".
set

0 I 5.0
o
cm

Selecting area for rectangular ducts
You are in APF mode and the display shows measuring position. If you press MODE twice, you will obtain one of pictures A, B or C. Page with MAX or MIN to "set area H ---- cm". If you were previously using a square duct, you come directly to "set area H". H is the height of the duct and corresponds to L1 in " Methods for measuring air flow in ventilation systems ".

---set area cm

H

21

If you press ENTER, the first digit will start to flash. You can now start setting the height of the duct, increasing with MAX and decreasing with MIN. Press ENTER to move to the next digit. When you are satisfied, select by pressing MODE. H is limited to values between 255.0 cm and 1.0 cm. When you have set the height H of the duct, proceed in the same way with the width b of the duct. Select by pressing MODE. The width b is also limited to values between 255.0 cm and 1.0 cm, b corresponds to L2 in " Methods for measuring air flow in ventilation systems ". For large values of H and b, the SwemaAir 300 indicates the area in m2 (no type is indicated on the display). When you selected width by pressing MODE, the SwemaAir 300 calculated the area according to the formula: effective area = H? b? k2 k2 is the duct factor taken from " Methods for measuring air flow in ventilation systems ". Vertical duct Horizontal duct Square duct (H > b) --> k2 = 0.94 (H < b) --> k2 = 0.98 (H = b) --> k2 = 0.96
set set

0 4 0.0
cm area

H

0 6 0.0
cm area

B

2352
set area cm
2

Selecting an optional area
You are in APF mode and the display shows measuring position. If you press MODE twice, you will obtain one of pictures A, B or C. Page with MAX or MIN to "set area cm2". You will obtain the area you last selected. If you were using "set area cm2", you will obtain this directly.

756
set area cm
2

22

If you press ENTER, the first digit will start to flash. You can now start setting any area between 1 cm2 and 6.553 m2, increasing with MAX and decreasing with MIN. Press ENTER to move to the next digit. When you are satisfied, select by pressing MODE.

0756
set area cm
2

NOTE: No duct factor k2 is included with optional area. NOTE: When flow is higher than can be presented on the display a point is inserted between every digit. For example 1.2.3.4 l/s. Then you do not know how many times higher the real flow is 10, 100, or 1000… In a protocol the real flow will be presented as m3/s if it is very high. You can select a smaller area (divide by 10,100 or 1000) to escape this problem.

Reminder list for APF mode
Changing mode from measuring position: Go to the program menu by pressing MODE for a long interval, then scroll using MAX or MIN and make your selection by pressing MODE again briefly. Changing time constant, duct area and units from measuring position Go to the parameter menu by pressing MODE briefly. Then select: 1. time constant, 2. diameter or height - width, 3. area and 4. units 5. measuring position. 1. Selecting time constant: Page with MAX or MIN, select and continue to 2. by pressing MODE. 2. Selecting standard diameter: Page with MAX or MIN, select and continue by pressing MODE. The SwemaAir 300 shows the area, continue by pressing MODE. 3. Selecting height - width: Page from diameter or area to H --- with MAX or MIN. To enter and indicate H (height of duct), press ENTER. You can then change the first digit with MAX or MIN, next digit with ENTER etc. When you are satisfied, continue by pressing MODE, you will obtain b (width of duct). Press ENTER, select b in the same way that you selected H, continue by pressing MODE. SwemaAir 300 shows the area, continue by pressing MODE. 4. Selecting optional area: Page with MAX or MIN to area, press ENTER, change the digits as above, continue by pressing MODE. 5. Selecting units: Alternate by pressing MAX or MIN, continue by pressing MODE. The SwemaAir 300 is in the measuring position.

23

AS
In the same way as when selecting APF mode, start with a long press on MODE until you see "set mode" in the bottom right-hand corner. You can now page forwards to AS with MAX or MIN. Then press MODE and you will return to the measuring position. If you are uncertain what mode you have ended up in, just press CLEAR and the display will show the current mode for a few seconds and then return to the measuring position.
m

AS
set mode

How the time constant works
The time constant is set by briefly pressing MODE (same as for AP, page 12). Depending on probe values can be selected from 0.025 to 120 seconds. The SwemaAir 300 normally measures twice per second. When the time constant is set shorter than 0.5 sec., it measures more often, if TC = 0.25 four times per second and if TC = 0.025 forty times per second - i.e. a higher sampling rate is obtained. In the case of higher time constants, the SwemaAir 300 still measures twice per second. For examle when the time constant is set to 8 seconds the displayed data is an average of the data collected over the previous 8 seconds. A long time constant produces a more attenuated measurement. See SWA 03 , which always samples every 0,1 second.

Measuring with AS mode
Place the probe where you wish to measure and then press ENTER. The SwemaAir 300 will automatically start to collect measured values at the time interval you have selected. At the same time the symbol "m/s" starts to flash on the display to show that the SwemaAir 300 is operating. If the time constant is shorter than 0.5 sec, you can see at all times how many measured values go to make up the average. If the time constant is higher, the measuring time is shown instead.
m m/s

3. I 6
no.

3

When you think you have sufficient measured values, press ENTER again and collection will cease ("m/s" stops flashing). You can start measuring again by pressing ENTER, e.g. if you want to form an average over several points. AS otherwise functions like AP mode. With AVG you page between average values, max, min and standard deviation and back to measuring position, in the same way as in AP mode on page 12. Save with NOTE/PRINT.

24

ASF
You change to ASF mode in the same way as described earlier, a long press on MODE. Select mode by pressing MAX or MIN and return to measuring position by pressing MODE.

m

ASF
set mode

You set the following in the parameter menu:
Time constant. Height x width or area. Units, l/s or m3/h. To set the time constant, briefly press MODE. Change by pressing MAX or MIN (same as AS). Continue with MODE. You are now in position to select area. Either select height and width, in which case the SwemaAir 300 calculates the area, or select area directly. Page between the setting options with MAX or MIN. If you want to change anything, press ENTER and use MAX and MIN to change the digit. Move between the digits with ENTER. (A more detailed description is given on page 18). When you are satisfied, press MODE. (Unlike APF mode, you cannot select diameter with duct coefficient, because ASF is not suitable for use in ducts, see page 7). You can choose between l/s and m3/h. Use MAX or MIN to change. Then press MODE to return to measuring position. N.B. All printouts are made in the unit last selected. This means that you can for example measure in l/s and nevertheless obtain the printout in m3/h.

Measuring with ASF mode
Measurement in ASF mode proceeds in the same way as for AS. Start and stop ENTER. Save with NOTE/PRINT. Measure the total flow by gently sweeping (traversing) the probe across the surface, e.g. an intake grille or opening to a fume cupboard. Repeat the measurement until you obtain the same measured values, in order to learn the technique.

H

25

Datalogger
In the LOG mode, you can store up to about 1.500 measured pairs (for ex. air velocity and temperature) or 2.500 single values (CO2, temperature) (6.400 resp. 10.000 with fully expanded memory.) at selectable interval. at desired between-readings interval. In the LOGP mode (the P stands for protocol, i.e. report) you can store up to about 200 protocols (reports) on series of readings. (800 with fully expanded memory.) These protocols contain averages, maximums, minimums etc. The user can select the length of the series and also the between-series interval. With a comfort sensor for example, you can set the between-series interval to 15 minutes (for example) in order to obtain 4 protocols (reports) per hour throughout a full working day, each of which presents the draught rate (DR) measured throughout 3 minutes (also user-selectable). LOG and LOGP function with all sensors. Logging continues until you shut it off or until memory is full or until the battery voltage drops too low. We thus recommend that you use a battery eliminator.

File Log 1 SWA 31 S/N: 103 Interval 5 s TC 1 s No m/s dgC --------------------1 0.104 27.50 2 0.098 27.50 3 0.106 27.48 4 0.092 27.51 5 0.092 27.50 File Log 2 SWA 31 S/N: 103 TC 2 s No m/s dgC --------------------1 0.074 27.48 2 0.094 27.47 3 0.135 27.47 4 0.177 27.48 5 0.086 27.46

File Log 3 SWA 01 S/N: 103 Intervall 10 min --------------------------Log No 1 ................. TC 0.5 s Average velocity 0.118 m/s Max 0.377 m/s Min 0.029 m/s Average temp. 27.5 dgC Measuring time 3 min Std. deviation 0.074 m/s Draught Rating 7.2 % Log No 2 ................. TC 0.5 s Average velocity 0.093 m/s Max 0.269 m/s Min 0.038 m/s Average temp. 26.4 dgC Measuring time 3 min Std. deviation 0.047 m/s Draught Rating 5.3 %

LOG

LOGP

How to enter the LOG and LOGP modes
You can change mode in the same way as previously, i.e. by holding down MODE for a long interval. You then select LOG or LOGP by pressing MAX or MIN. To return to the measurement state, press MODE.

26

LOG
You use LOG to log readings at a user-selectable between-readings interval. (the time in between a start of one reading to the start of the next.) Readings are logged automatically into the memory. When you press MODE you can select a time constant ("set time constant"). You then select MAX or MIN and press MODE again. You can now select a between-readings interval ("interval set") ranging from 0.5 seconds to 24 hours. Select MAX or MIN and press MODE again to return to the measurement state. To start or finish logging, you press ENTER. SwemaAir 300 takes readings at the betweenreadings interval that you have selected. If, for example, an air velocity sensor is connected, the current air velocity will appear on the display in large numerals while "m/s" flashes in the upper right-hand corner. The number of readings that have been taken and stored is shown in small numerals.

m

m/s

I.0 6
no.

9

When you interrupt the taking/storing of readings by pressing ENTER, the display presents briefly the name of the file ("FILE") in which your readings are stored.

m

F ILE
no.

2

You can now view your readings by pressing + , m thus displaying the last reading in the last file. Now press MIN until "hEAd" appears in the lower part of the display. This is the file's head, and it contains information about the selected time constant and between-readings interval. If you press AVG, the display indicates that you are in the logbook (Log) and also whether you are in the LOG or LOGP mode. If you press AVG a second time, the time constant is displayed, and if you no. press AVG a third time, the between-readings interval is displayed. If you continue to press AVG repeatedly, the readings that you have stored will be displayed in the same way as they would appear if they had been entered into the notebook.

SEE

HEAD

27

We can now proceed further and view another file. Press MODE to go to the file menu. The display now indicates which file is currently open (in the same way as when you are in the notebook). The only difference is that the in the logbook, the files in the file menu are designated with the letter "L" instead of the letter "n". You can select the number of the file you want to view using MAX or MIN and then press MODE again, whereupon you can view the specified file in the same way as set forth above.

m

L
set

5
F ILE

Entering readings manually in the LOG mode
If you press NOTE/PRINT while you are in the LOG mode, a new file is opened and a first reading is stored. Each time you press NOTE/PRINT, a new reading is stored in the same file. You can check the number assigned to the file by pressing MIN. Since manual entries are being made here, the file must also be closed manually. This means that if you turn off the instrument and turn it on again, the file will still be open and you can continue to enter readings into the file. There are two ways to close a file: By pressing and then pressing NOTE/PRINT. The file's number will then be displayed for a brief interval. You can check that the file is actually closed by pressing MIN. If the file number appears, the file is still open. If not, the file is closed. By starting automatic readings by pressing ENTER, whereupon the fill will be closed and a new one will be opened for the new readings.

-

The "Interval" line will be missing on the printout, thereby indicating that manual entries are being made, as shown in file 2 in the illustration on page 25.

LOGP
In the LOG mode you obtain individual readings, but in the LOGP mode you obtain entire series of readings that are compiled into protocols (reports). A protocol contains maximums, minimums, averages, standard deviations etc. You determine how long each series is to be ("interval set AS") and also the between-series interval ("interval set LOGP"). While in the measurement state, you select LOGP and press MODE. You can now select the time constant ("set time constant"). Make your selection using MAX or MIN and then press MODE again. You can now select the length of the readings series ("interval set AS"), and it can range from 5 seconds to 60 minutes. Make your selection using MAX or MIN and then press MODE again. You can now select the between-series interval "interval set LOGP", and it can range from 5 seconds to 24 hours. (The time from the start of one measurement serie to the start of the next.) Press MODE again to return to the measurement state.

28

You start and end by pressing ENTER. SwemaAir 300 takes series of readings at the between-series interval that you selected. If, for example, an air velocity sensor is connected, the current velocity is presented on the display in large numerals while "m/s" flashes in the upper right hand corner. The number of readings taken/stored between series of readings and the number of seconds throughout which reading continues also appear in small numerals.

m

m/s

2.7 7
no.

5

When you interrupt the taking/storing of readings by pressing ENTER, the name of the file ("FILE") where your readings are being stored is displayed in the same way as set forth above for LOG. If you wish to view your readings, you proceed in the same way as set forth above for LOG.

29

Logbook
To view, delete or print out logged readings you must enter the logbook. If you have a sensor connected and you are in LOG or LOGP, you can enter the logbook by pressing + . You can browse (scroll) among the values using MAX and MIN. You can view the values by pressing AVG. By pressing ENTER, you can see how many readings are stored in LOG plus the number of reports stored in LOGP (contained in the logbook). If you want to know in which file ("FILE") you are, press MODE. Here, you can browse (scroll) among the files using MAX and MIN.

Logbook/notebook without sensor
If no sensor is connected, you will enter the logbook or notebook directly. The display shows the battery voltage and "Log" (as illustrated) or the battery voltage and "note", after which "See nr" is displayed. If you didn't have time to see whether "Log" (logbook) or "note" (notebook) was displayed press ENTER, whereupon "Log" or "note" and the total number of stored records will be displayed. You can switch between "Log" and "note". First hold down MODE for a long interval, whereupon the display will present "Log" or "note". Then use MAX or MIN to switch, and confirm your selection by pressing MODE.

V

8.2
LOG

Printing out readings
By pressing NOTE/PRINT briefly, you can print out the readings starting at your present location and continuing forward. By holding down NOTE/ PRINT for a long interval you can print out all files. If you only want to print out a single file, press MODE and the display will show which file you are now in. Then press NOTE/PRINT to print this file out from the beginning. You can always stop printout by pressing NOTE/PRINT.

Deleting logged readings
You can delete all logged readings or delete only the last file. You cannot delete other files or individual readings. To delete all logged readings: This can be done when logged values are shown on the display. Hold down CLEAR for a long interval. First, "Log" appears in the display together with number of records about to be erased. After an interval, "clear?" appears. If you change your mind, press any key except CLEAR. If you still want to delete all logged readings hold down CLEAR until you hear the acknowledgement and see "nr ----" on the display.

30

To delete the last file proceed as follows: Go to the file menu by pressing MODE and scroll to the last file by pressing MAX. Now advance to the last file using MAX. Press CLEAR, whereupon "Log" will appear first together with the total number of records. You will then hear an acknowledgment signal, and the display will show the number of the last remaining file.

m

L
set

6
F ILE

Some help functions in LOG and LOGP
If you want to know how much memory is still free, you can (from the measurement state) view the number of readings (LOG) or protocols (LOGP, AP, APF, AS... etc.) for which space is still available. Press MAX and the display will present (for example) If you have started a logging operation, in LOG, you can still see how much space remains free in the memory. This can be good to know since the same memory is used for notes in the AP, APF, AS, ASF etc. modes.

m

FREE
336

If you want to know in which file the current logging operation in LOG will be stored, press MIN and the display will present "FILE no. 3" for example.

F ILE
3

If you store readings manually in LOG using no. NOTE/PRINT, you can use the same procedure to ascertain which file the readings will be stored in. + You can also see that the file is still open, i.e. not closed, by pressing NOTE/PRINT or by starting the automatic taking of readings by pressing ENTER.

31

Temperature SWA 25 / 53 / SWT 315 / 215 / 221
You can connect SWT 12-53 temperature sensors to SWA 25 temperature handle and SwemaAir 300. SWA 53 duct sensor is connected directly to SwemaAir 300. SWT 315, 215 or 221 is connected with a cable (759.950). You shall always switch off your SwemaAir 300 before changing sensors. The first time with a temperature sensor you'll start in the AP mode.

Selecting mode
Start with a long press on MODE and select between AP, AS, LOG and LOGP with MAX or MIN. (You can find more information about AP and AS on page 7). Press MODE and you're back in measurement position.

Selecting time constant
Press MODE briefly and select with MAX and MIN. Return to measurement position by pressing MODE.

Measuring with temperature sensors
The temperature sensors work the same way that the rest of SwemaAir 300:s sensors do, that is you collect values with ENTER. Use AVG, MAX and MIN to examine average, max and min values. Store with NOTE/PRINT.

2 4.3
°C

No 1 ..................... SWA 25 S/N: 103 Mode AP, TC 2 sec Average temp. 26.3 dgC Max 27.1 dgC Min 25.6 dgC Measurements 10

32

Humidity measurement SWA 11-16, Hygroclip
When replacing probes, always switch off the SwemaAir 300 first. Connect the humidity probe and switch on the SwemaAir 300. You will directly enter AP mode.
m
%RH

2 2.0
2 7. I °C
m

Press ENTER at least once to store the measured values in the working memory. Then press AVG, you will see the average value and average temperature. After pressing AVG a second time, you will see the dew point. A third press on AVG shows the water content. A fourth press causes average value and number of measuring points to be shown for a short time, and you then return to the measuring position. On printout, the SwemaAir 300 calculates the dew point and water content. The printout looks like this:

DP
3.6 °C
No 1 ..................... HP 101 S/N: 103 Mode AP, TC 1 sec Average humidity 21.3 %RH Max 22.6 %RH Min 20.7 %RH Average temp. 25.4 dgC Dew point 1.6 dgC PPM by weight 4259 PPM Measurements 5

The SwemaAir 300 calculates the water content of the air at the measured temperature and the stored air pressure. You should therefore store the air pressure (see SETUP) when you perform the measurement. In most cases, the accuracy will be satisfactory if the normal pressure, 1013 hPa, is used for calculation. This pressure is entered prior to delivery and is invoked each time you turn on the instrument. SwemaAir 300 calculates the water content by weight, that is mg water / kg dry air. The instrument shows water content on the display by g/kg.

If you do not need to see the dew point on the display or to form the average, you can store a value directly in the logbook with NOTE/ PRINT. You will then obtain a shorter printout.

No 2 ..................... HP 101 S/N: 103 Mode AP, TC 1 sec Rel. humidity 20.3 %RH Temperature 25.7 dgC Dew point 1.1 dgC PPM by weight 4136 PPM

33

Draught probe SWA 03
When replacing probes, always switch off the SwemaAir 300 first. Connect the Draught probe and switch on the SwemaAir 300. You will directly enter CO mode - Comfort mode. By sliding the cover down the sensor is ready to measure. The draught sensor is a direction-independent SWA 03 S/N: 103 TC 1 sec sensor and complies with the measurement Mode CO, requirements set forth in ISO 7726. It has four Average velocity 0.241 m/s 0.514 m/s modes: CO, AS, LOG and LOGP. In CO mode Max 0.034 m/s you measure continuously over a selected Min Average temp. 27.1 dgC period of time. You can select time intervals Measuring time 15 sec from 5 sec to 60 min. You obtain average, max Std. Deviation 0.138 m/s and min velocity and the standard deviation. Draught rating DR 20.5 % The SwemaAir 300 also calculates DR, the draught rating, which is a measure of what percentage of people in the room consider it to be draughty. AS mode operates in the same way as AS mode for the ordinary air velocity probe, with the difference that the Comfort probe is omnidirectional. It may be useful for example for measuring in a fume cupboard. However, no draught rating (DR) is calculated in AS mode.
No 1 .....................

Selecting time interval in CO mode
Press MODE briefly. You can now set the time constant. Change by pressing MAX or MIN. (0.25sec…120sec.) The time constant for SWA 03 is the time during the value on the display was measured. It is an average value of samples (each 0,1 second).

I5

Then press MODE again. You can then select the interval sec. time interval during which you wish to measure. set You can select from 5 sec to 60 min. ISO 7726 recommends 3 minutes. During the selected time interval the SwemaAir 300 measures automatically with the time constant you have chosen. Press MODE again to return to measuring position.

Measuring with the Draught probe in CO mode
Start measuring by pressing ENTER. "m/s" starts to flash on the display, and you see how long measurement has been in progress. When the selected time interval has elapsed, measurement stops and is automatically saved in the logbook. The note no. given to the measurement is shown for a short time. Select different notes by pressing MIN / MAX. The SwemaAir 300 is then ready for a new measurement.
m m/s

0.0 3 4
sec.

2

34

If you want to look at the measurement, enter the logbook by pressing + , and you will go straight to the latest measurement. Page with AVG in the usual way and press to return to measuring position. You can stop the measurement before the time interval has run out by pressing ENTER. You can then look at the average, standard deviation, measuring time, max and min values and by pressing the AVG, AVG, AVG, MAX and MIN buttons in exactly the same way as for the air velocity probe. (A precise description is given on page 12). If you are satisfied with the measurement and want to save it, press NOTE/PRINT.

AS mode
To change to AS mode, proceed in the same way as earlier for changing mode. Keep MODE depressed until "CO" and "set mode" appear on the display. Change with MAX or MIN and press MODE to return to the measuring position. If you are uncertain what mode you have ended up in, just press CLEAR and the display will show the current mode for a few seconds and then return to the measuring position. Press MODE briefly and select time constant, the time during the value on the display was measured. Change by pressing MAX or MIN. When calculating the Avg, Max, Min, Std dev. and DR the time constant is always 0.1 second. Return to the measuring position with MODE. The principle is the same as in the AS mode of the air velocity probe (see page 23). Start and stop with ENTER. Look at the collected data with AVG, MAX and MIN. Save with NOTE/PRINT.

Draught rating, DR
The draught rating, DR, expresses the percentage of a group of people bothered by the air movements in the room (finding the room draughty). The DR is based on experiments conducted at the Technical University in Copenhagen, directed by Professor Fanger. DR is included as a measure of undesirable air movements in the ISO 7730 standard adopted for indoor climate. The values used for calculating the Avg, Max, Min, Std dev. and DR are always measured during 0.1 second. The draught rating, DR, is calculated from the formula: DR = (34-ta) (v-0.05)0.62 (0.37·v·Tu+3.14) where ta v Tu = local air temperature (°C) = local average air velocity (m/s) = standard deviation (%) average velocity

35

Differential pressure probes SWA10, SWA 07
To measure pressure with the SwemaAir 300, use the special pressure probe, SWA 10 or SWA 07. Measuring range for SWA 10 is -300…+1500 Pa and ±7000 Pa for SWA 07. You can also connect a SwemaMan 2000, which will give you access to all SwemaAir 300 features. All you need is a specially adapted cable. Measuring range for SwemaMan 2000 is ±2000 Pa.

Getting started
Interconnect the instruments. The SwemaAir 300 as always first shows the battery voltage and the mode you are in and then goes over to the measuring position. In the measuring position in mode AP or APF the display shows the air velocity, m/s, in large digits and the pressure difference in Pa in small digits. If the symbol "CON" appears with SWA 10 - turn the instrument off and turn the connecter ring firmly and turn on the instrument. If you have a SwemaMan, you must first switch it on and adjust it to zero (see directions for use of SwemaMan 2000). You do not need to be very accurate as you make the essential adjustment to zero with the SwemaAir 300 before measuring.

m

m/s

I.4
I.2
m m/s

When this has been done, you must calibrate the SwemaAir 300 to zero. SWA 10 can be connected to pressure but SWA 07 and SwemaMan 2000 has to have zero differential pressure connected. (SWA 10 has an inbuilt valve that short circuits the and then pressure automatically.) First press MIN, quickly after each other. You will hear a long beep signal and the message "cal" will light up on the display. You can now start measuring.

0

0.0

SWA 10 with SAFE
There are some special features available with SWA 10. SAFE is default. By the built in valve the zero pressure point is automatically checked every time you take a measurement by pressing "ENTER" or save directly with "NOTEPRINT". When working in this way you never need to calibrate zero. However the display shows the same digits as you save if you have the sensor zero calibrated. Warning: Zeroing may take long time: time constant + 3 sec. If a 30 second time constant is selected it will take 33 seconds to take a measurement.

SWA 10 with FAST
With FAST no zero check is done automatically. The measurement takes shorter time. Due to very stable zero point zero checking is sometimes unnecessarily.

36

Selecting SAFE or FAST
By pressing MODE and * at the same time you will reach the setup menu. Step with MAX and MIN to FAST or SAFE. Change by pressing ENTER and thereafter MAX or MIN. Leave the setup menu by pressing MODE. (The selection will stay until you change it again.)

Advice for accurate measurments
SWA 10 has a small position dependence of ±0,3Pa. When you use SAFE and hold the SWA 10 in firm position during zero point checking this error disappears. The SWA 07 is sensitive to tilting in the longitudinal direction, a 90° tilt producing a change of 4-5 Pa. It is recomended to use the SWA 07 with the magnet holder Art. No. 760.020. SWA 07 is sensitive for temperature schocks. Avoid holding your hand on the SWA 07. Temperature changes of this type will cause zero drift that may take 1-2 minutes to dissappear. The temperature compensation works for slow changes. It is possible to log over several hours with minimal zero drift. The SwemaMan 2000 is sensitive to rotation, a 90° rotation giving a change of 8-9 Pa. The problem of the positional dependence of the SwemaMan can be avoided by leaving the SwemaMan in position and only moving the SwemaAir 300.

Selecting mode
Mode is selected in the same way as for other probes, i.e. with a long press on MODE. Choose between AS, AP, APF, dPF, LOG and LOGP with MAX or MIN and press MODE. You are back in the measuring

Measuring with the Pitot static tube in AP mode
Use AP (Average Point) if you want to measure air velocity with the Pitot static tube. Start by selecting the time constant. You should select a time constant of approx. 2 sec. to reduce the flicker in the value shown. Press MODE briefly and select with MAX or MIN. A further press on MODE will return you to the measuring position. 2 ? ?P Air velocity is calculated according to the formula: v=

ρ

where ?P = dynamic pressure = total pr. – static pressure (Pa) B ? 273 ρ = density of air = 1293 ? . (kg/m3) 1013 ? (273 + t ) B = barometric pressure (can be changed in the setup menu) t = air temperature (can be changed in the setup menu) If B and t are changed in the setup menu, they are saved in the report.

37

AP for pressure sensors works in the same way as for the air velocity probe (see pages 1216), i.e. each time you press ENTER, a measured value is collected. Look at collected data with AVG, MAX and MIN. Save with NOTE/PRINT.

No 1 ..................... SWA 07 S/N: 103 Mode AP, TC 2 sec Average pressure 1.4 Pa Average velocity 1.55 m/s Max 1.68 m/s Min 1.42 m/s Measurements 8

APF
APF (Average Point Flow) is used for measuring flow in ducts. Start by selecting constants, which is done in the same way as for other probes in APF mode (see pages 1722). Press MODE briefly and select time constant, duct size (diameter, H and b or area) and unit (m3/h or l/s) with MODE, ENTER, MAX and MIN. The flow is calculated according to the formula: q = k2 ? A ? v Where k2 = duct factor (see pages 19 and 40) A = area v = air velocity

No 4 ..................... SWA 07 S/N: 103 Mode APF, TC 4 sec Area: 16, 193 cm2 k2 0.96 Average flow 25.8 l/s Average pressure 1.1 Pa Average velocity 1.34 m/s Max 1.67 m/s Min 1.08 m/s Measurements 4

Measurement takes place in the same way as in AP mode, i.e. each time you press ENTER a measured value is collected. Look at collected data with AVG, MAX and MIN. Save with NOTE/PRINT. The average pressure given in the report is calculated from the measured average velocity. See also "Measuring flow in ducts" on page 39.

dPF
dPF (differential Pressure Flow) mode is used to measure the flow across devices and narrowing flanges by the pressure-drop method. Use is made of the k factor of the device (designated "C" on the SwemaAir 300 display), which is entered into the SwemaAir 300. The flow is then obtained directly on the display. The flow is calculated formula: q = k ?P according to the

(Use a k –factor used for calculting l/s – that is how SwemaAir 300 do. Certain suppliers calculate the correction factor using the following formula: q = I k ? ?P , in such case you must enter k =
I k in SwemaAir 300.)

38

If the supplier has not specified a correction factor, you can calculate it easily. All you need is a pressure-drop diagram for the device in question. Proceed as follows:

q ?P Now go into the diagram for (for example): ?P = 100 Pa q = k ?P ? k=
Connection size [mm] Pressure drop [Pa] 100 160 250

?P = 100 = 10

100

50 40 30 20

10 20

30

40

50

100 Flow [l/s]

200

300

400

for ?100

?

50 l/s

Use the same ratio as above for k 50 50 k= = = 5.0 100 10 Enter C = 5.0 into SwemaAir 300 and measure ?P to obtain flow directly in l/s. If the diagram does not extend to 100 Pa, select (for example) 25 Pa ( 25 = 5 ). We start by selecting constants. After briefly pressing MODE, you can select the time constant with MAX or MIN. Press MODE again and you can then enter the k factor of the device with ENTER, MAX and MIN. To enter a correction factor greater than 99, move to the leftmost digit and then step upward using MAX. When you pass "9" the display will switch to hundreds with one decimal instead to tens with two decimals. After pressing MODE once more, you can select unit. Another press on MODE returns you to the measuring position. When you measure the pressure drop across the device, you obtain the flow directly in the unit (m3/s or l/s) you have selected. (Note that you shall always enter C as the calculation should be done in l/s.) At the same time you see the pressure drop in Pa in the lower part of the display. If you measure at several points, you will obtain the average pressure and average, max and min flows.

2.8 0
set

C
No 2 ..................... SWA 07 S/N: 103 Mode dPF, TC 4 sec k 2.8 Average pressure 2.1 Pa Average flow 4.1 l/s Max 4.2 l/s Min 4.0 l/s Measurements 6

39

If you are only interested in the pressure drop, you can set k = 0. The SwemaAir 300 will then show the pressure drop in Pa.
Nr 7 ..................... SWA 07 S/N: 103 Mode dPF, TC 4 sec Pressure 25.7 Pa

m

2.8
PA

The SwemaAir 300 stores the last 10 correction factors used. You can scroll among them using MAX and MIN.

Measuring the flow in ducts
This method (Methods for measuring air flow in ventilation systems, by the Nordic Ventilation Group and the Building Research Council,1998, ISBN 91540-5827-9.) applies when the measuring probe (air velocity probe or Pito static tube) has a diameter which does not exceed 1/30 of the duct diameter. 1. Select APF mode and adjust to zero according to the description on page 35. Enter the time constant, duct size and unit (see APF page 37). Select the correct recommended measuring plan (see next page). Measure point by point by pressing ENTER. The SwemaAir 300 calculates the volume flow for you according to the formula:

2. 3.

q = k 2 ? area ? velocity
4. Save the series of measurements with NOTE/PRINT.

40

Recommended positions of measuring points
From Methods for measuring air flow in ventilation systems, by the Nordic Ventilation Group and the Building Research Council,1998, ISBN 91-540-5827-9. For D≤400, k2 values are from NBI report Nordtest-proj. Nr. 1463-99
Circular cross-section: *) D ≤ 160 mm ? k2 = 0.92 (SWA31), 0.89(Pito Static Pipe) 160 < D ≤ 400 mm ? k2 = 0.96 (SWA31), 0.95(Pito Static Pipe) 400 < D ≤ 1250 mm ? k2 = 0.98 a b c d

Nominal diam = D [mm] 100 ? 1 125 ? ) 160 ?

Measuring plan

b a

b=0.71D a=0.29D

36

29 89 46

71 114

200 250 315 400

c b a

c=0.9D b=0.5D a=0.1D

20 25 32 40

100 125 160 200

180 225 283 360

500 630 800 100 1250
1

d c b a

d=0.957D c=0.71D b=0.29D a=0.043D

22 27 34 43 54

145 185 230 290 360

355 445 570 710 890

478 603 766 957 1196

) The diameter of Prandtl tube should not exceed 1/30 of the diameter of the duct. In the case of duct dimensions < 200 mm, a Prandtl tube with a diameter of 3-4 mm should be used..

Rectangular cross-section:

*)

Vertical duct(L1 > L2) Horizontal duct (L1 < L2) Square cross-section

? k2 = 0.94 ? k2 = 0.98 ? k2 = 0.96

According to new duct standard SIS 82 72 04
L1 L2

Two dimension ranges f?r L2:

I 200 < L2 ≤ 300 II 400 < L2 ≤ 2000

For range I : For range II:

a = 0.08L2 , b = 0.43L2 , c = 0.57L2 , d = 0.92L2 a = 0.060L2 , b = 0.235L2 , c = 0.430L2 , d = 0.570L2 , e = 0.765L2 , f = 0.940L2

Three cases for L1 (height): 1 100 < L1 ≤ 400
L1 2 a b c d e f

2 400 < L1 ≤ 800
L1 4 L1 4

3 800 < L1 ≤ 2000
L1 6 L1 6 L1 2

The following location of measuring points is obtained for measurement cases 1, 2 and 3 dependent on L2 (width). 400 25 95 170 230 305 380 500 30 120 215 285 380 470 600 35 140 260 340 460 565 800 50 190 345 455 610 750 1000 60 235 430 570 765 940 1200 70 280 515 685 920 1130 1400 85 330 600 800 1070 1314 1600 95 375 690 910 1225 1505 1800 110 420 775 1025 1380 1690 2000 120 470 860 1140 1530 1880

L2 a b c d e f

150 200 13 16 65 85 85 115 137 184 — — — —

250 20 110 140 230 — —

300 25 130 170 275 — —

*) Already entered in SwemaAir 300 in APF mode!

41

SwemaFlow 125 flow capture
SwemaFlow 125 is a new generation flow captures for SwemaAir 300 that measures both air flow and temperature. The measuring method used is the hot wire method. That gives a wide measuring range of 2 - 125 l/s for air flows at temperatures of 0-50 °C. The SwemaFlow 125 measures both inlet and outlet air flows. The capture for outlet air is 400 mm long with an opening of 300x300 mm. For inlet air the capture has to be longer (minimum 3 hydralic diametres according to standards). An outlet valve are usually of bigger size. There are two Outlet Captures for the SwemaFlow 125 both with the length of 800 mm. Their openings are 600x600 mm resp. 250x600 mm. SwemaFlow 125 has chargeable batteries and an intelligent battery charger that charge empty batteries in an hour. It is also possible to charge the batteries even if they are not empty - you decide when. Fully charge batteries last a normal working day. You can choose AP, BP, AF, AS, LOG och LOGP measuring program in the SwemaAir 300 to work together with SwemaFlow 125. The programs AF and BP are tailor made for SwemaFlow 125. The programs AP, AS, LOG och LOGP works in the same way as for other probes.

The Flow capture key
SwemaFlow 125 has an external ENTER key, so called Flow capture key, placed on the flow capture next to one of the two handles on the flow capture. It has the same function as the ENTER key on SwemaAir 300. When using the instrument holder, you?ll see the display at the same time as you operate the flow capture with both hands. When you have made a measurement you store it in the note book by pressing the Flow captur key a long time. (min. 2 seconds.)(It works the same as pressing NOTE/PRINT on SwemaAir 300).

How you measure
Connect SwemaFlow 125 to SwemaAir 300 and press ON/OFF. The large digits shows the air flow and the small the temperature.

l/s

0.0
2 I.5 °C

Measuring program AF (Average Flow)
Measuring Air flow better values are obtained by making a mean value over time. AF mode makes a measurement over 7 seconds. (You may change.)

42

How you make an AF - mode measurement: When turning the SwemaAir 300 on, connected to SwemaFlow 125, automatically you will be in
measuring mode AF. Place the Flow capture over the valve. l/s AVERAGE

Press Capture key Short or ENTER key

Explanation Starts measurement. Count down of measured time on display.

2 3.0
2 I.5 °C

When the measurement is made you?ll here a bip and the display shows the mean value. Press MAX or MIN and max and min values from the measurement are presented. Capture key Long or NOTE/PRINT CLEAR Stores measurement in note book.

m note

Erases measurement.
no.

Now your ready for next measurement.

I

This is how a protocol stored in the note book looks like.

Nr 1 ..................... SWA 125 S/N: 361199 Mode AF, TC 2 s Average flow 23,0 l/s Max 24,1 l/s Min 21,4 l/s Std.deviation. 0,9 l/s Average temp. 24,2 grC Measuring time 5 s

Measuring program BP (Backpressure)
When measuring in some ventilation systems (especially systems with low pressure drops and high air flows) corrections of measured values have to be made for throtteling the sytems that the air capture does. That correction the SwemaFlow 125 can do for you. By measuring with two known throttles SwemaAir 300 calculates the flow withot throttle. That value reflects the true flow - no capture interference. In the same way as AF mode the bP mode makes an avarege measurement. The measurement time is 7 seconds (You may change it).

43

How you make an bP - mode measurement: Connect SwemaFlow 125 to SwemaAir 300 and press ON. automaticly you are in measurement mode AF. Change to BP by: Press MODE long Explanation Go to Program Measuring program

Menu AF.

AF
set mode

MAX, MIN MODE short

Step to measuring program bP. Leave program menu.

BP
set mode

SwemaAir 300 remembers which program you used the last time as long as you have not change the probe. When you change probe the SwemaAir 300 will choose the program that is default for that probe. The default for SwemaFlow 125 is AF. When you have switched the instrument ON you can check wich program you are using by pressing CLEAR. When measuring with the throttle ring, the ring shall always be placed after the hot wires in the sense of flow direction.
INLET AIR OUTLET AIR

THROTTLE RING

Flow direction

44

Place the throttle ring on the measuring unit and place the capture over the valve. Press Capture key Explanation Measures point 1 Countdown of measured time on display.

l/s

9 7.7
PO 1

When ”Point 1” is measured you hear a bip and the display shows PO 2 . Within one minute you must measure ”Point 2” without the throttle ring otherwise the instruments returns to ”Point 1”. Remove the throttle ring and place the capture over the valve once more. Capture Key Measures point 2 Count down of measured time on display. Thereafter the TRUE value is calculated and presented on the display
l/s

10 1.8
PO 2
l/s

Press MAX to present the measurement without the throttle ring (Point 2) resp. MIN to present the measurement with throttle ring(Point 1). Capture Key Long or CLEAR Stores the measurement in the notebook. To clear memory.

1 1 1.3
TRUE

Now you can make next measurement.

45

This is how the protocol looks like that is stored in the note book.

Nr 2 ..................... SWA 125 S/N: 361199 Mode bP, TC 2 s Real Flow 111,3 l/s With capture 101,8 l/s Extra throttle 97,7 l/s Temperature 24,2 grC Measuring time 5 s

In wich order you make the measurements, with or without throttle ring, does not metter. SwemaAir 300 will automatically place them in right order. If you get a blinking value there is a risk that the total measurement error exceades 10 %. (The total measurement error includes the instrument error, method error (bP) and reading error.) Change time constant, measuring time or unit If you want to change the instrument time constant (slowness), measuring time or in which unit the measurement should be presented you do that in the parameter menu. These changes can be done as below: Press MODE short Explanation Enter parameter menu Start with time constant (instrument slowness). Choose time constant. If you want to choose default value. Measuring time. Can be set in between 0 sek.- 60 min. Choose measuring time. To choose default value.
interval set set time const.

2
sec.

MAX, MIN
(CLEAR)

MODE short

5

MAX, MIN (CLEAR)

46

MODE short MAX, MIN (CLEAR) MODE short

Choose measuring unit. l/s or m3/h. Choose default. Go back to Measurement mode.
set

l/s

By pressing CLEAR instead of MAX/MIN you will always choose default whenever you change the settings of the instrument.

Measuring advice
To aid you to make the best measurements here are some advice that we want to share with you. 1. SwemaFlow 125 is capable to measure even non straight flow stream outlets. However there are two situations where it is not possible. One is eddy outlets which brings the capture in pulsation and the other is an outlet where the duct is completely open - the valve is missing, which creates a negative pressure in the capture. The read values may be to high. When using AF mode, if you think there is a throttle effect with the capture try an other measurement with the throttle ring. If the flow then is lower it is better to make the measurement in bP mode. When measuring with the bP mode and outlet air we recommend to make the first measurement with the throttle ring. Then it is possible to remove it and hold it with your thumb and thereafter measure point 2. When making a measurement only to measure the proportional flow it is of course time saving to use the AF mode instead og bP. You may store all the outlet air measurements in one file and the inlet air measurements in an other to be able to compare the total flows. Choose add in the setup menu and the total flow will be presented at the end of each file. How to make a File see page 16. SwemaFlow 125 endures normal handling and transport. After using - Keep the instrument in its case to protect it from shocks and dirt.

2.

3.

4. 5.

6.

47

Stabelizing the air flow

It take some time for the flow to stabelize in the flow capture. When measuring the at mode AF and BP a delay of one time constant is made before the measrument is started. This method results in more accurate (repeatable) measurements. EX. You have choosed 2 sec. time constant and 5 sec. measuring time. This is why the SwemaAir 300 is making a count down from 7 to 0 when doing a measurement.

Atmospheric pressure
The Atmospheric pressure effects the SwemaFlow 125 because the hot wire method physically detects the mass flow rate. At greate deviation from normal atmospheric pressure (1013 hPa) it is adviced to insert the correct pressure in the Setup menu in the SwemaAir 300. If you have changed the protocol will show the specific value. When turning off, the value will go back to 1013 hPa. SwemaFlow 125 is temperature compensated between 0 - 50 °C. Therefor no change in temperature in the Setup menu is necessary.

Battery
In the Swemaflow 125 there is a rechargeble battery pack of nickelmetallhydrid type (NiMH). A full charged battery last a normal working day. At high Air flow it may last a shorter time. Indication when battery has to be recharged. When the battery is nearly empty the battery symbol on the SwemaAir 300 blinks. When the battery is completely empty the SwemaAir 300 turns itself off. ( When the SwemaAir 300 battery is nearly empty the battery symbol is continously lit. When the battery is empty SwemaAir 300 turns itself off.) Charge the battery when you want Use the charger that is delivered together with the SwemaFlow 125. Do not use another charger which may be dangerous. Connect first the charger to a wall connector and secondly to the SwemaFlow 125. A red diod is lit on the SwemaFlow 125. If the red diod is blinking disconnect and try to connect once again. When the battery is fully charged the diod blinks. It takes one hour to charge the battery. If the SwemaAir 300 is connected when charging the SwemaFlow 125 it should be turned off. The battery is protected by over charging and when the battery is charged trickel charging will go on until the battery charger is disconnected. Charging the batteries should take place at an instrument temperature between 10 - 45 °C.

48

SwemaFlow 65 flow capture

SwemaFlow 65 together with SwemaAir 300 measures outlet air (suction from room.) from 2l/s to 65 l/s. You can choose AP, AF, AS, LOG and LOGP measuring program. The programs AP, AS, LOG and LOGP works in the same way as for other probes. AP is the fastest measurement and AF gives you the most stable result.

How you measure in measuring program AF (Average Flow)
Connect SwemaFlow 65 to SwemaAir 300 and press ON/OFF. The large digits shows the air flow. When you connect the SwemaFlow 65 AF is the default program. (To change program go to the Program Menu) Place the Flow capture over the valve. Press ENTER Explanation Starts measurement. Count down of measured time on display. When the measurement is made you?ll here a bip and the display shows the mean value. Press MAX or MIN and max and min values from measurement are presented. Stores measurement in note book. Erases measurement.

the NOTE PRINT or CLEAR

m note

Now your ready for next measurement.
no.

I

This is how a protocol stored in the note book looks like.

Nr 1 ..................... SWA 65 S/N: 361199 Mode AF, TC 2 s Average flow 23,0 l/s Max 24,1 l/s Min 21,4 l/s Std.deviation. 0,9 l/s Measuring time 5 s

49

Change time constant, measuring time or unit
Press MODE short Explanation Enter parameter menu Start with time constant (instrument slowness). Choose time constant. If you want to choose default value. Measuring time. Can be set in between 0 sek.- 60 min. Choose measuring time. To choose default value. Choose measuring unit. l/s or m3/h. Choose default. Go back to Measurement mode.
set interval set set time const.

2
sec.

MAX, MIN
(CLEAR)

MODE short

5
l/s

MAX, MIN (CLEAR) MODE short MAX, MIN (CLEAR) MODE short

By pressing CLEAR instead of MAX/MIN you will always choose default whenever you change the settings of the instrument.

Battery

The Swemaflow 65 has a rechargeble nickel-metallhydrid (NiMH) battery pack. A full charged battery last a normal working day. At high Air flow it may last a shorter time. When the battery is nearly empty the battery symbol on the SwemaAir 300 blinks and the red diod on SwemaFlow 65 is shut off. When the battery is completely empty the SwemaAir 300 turns itself off. Use the charger that is delivered together with the SwemaFlow 65. Do not use another charger which may be dangerous. It takes approx. 3 hours to charge the battery. The battery is protected by over charging and it may also be charged before it is empty.

50

Measuring CO2
You can connect your SwemaAir 300 to an Airtest in order to measure CO2. This requires a special cable. You can access the following programs while measuring CO2: AP, AS LOG and LOGP. While your are measuring, the reading appears on the display directly in ppm. ”CO2” appears at the bottom of the display to indicate that you are measuring CO2.

950
CO2
File Log 2 AIRTEST CABLE S/N: 100 Interval 5 s --------------------------Log Nr 1 ................. TC 2 s Average CO2 951 PPM Max 954 PPM Min 950 PPM Std. deviation 2 PPM Measurements 2 min

In the LOG and LOGP modes, you can log variations in CO2 content throughout a long period and then output the result to a PC or printer. An example of LOGP measurement appears at right.

51

SwemaTwin
Connect 1 modem each to 2 SwemaAir 300 or a long cable in between the 2 SwemaAir 300:s. Turn the 2 instrument on and select 2 modes that show flow. (Press MODE a long time and select with MAX or MIN.) AF or DPF for example. Select the baud rate in the SETUP menu. (Modems are normally set to 4800 (2AsxE or 1AsxE)). Press * and MODE at the same time to reach the SETUP menu. Go to bAUd with the MAX and MIN button. Press ENTER and change with MAX and MIN and thereafter MODE. Select K-factor for the pressure sensor. Place the reference-instrument at the reference measurement point. Go to the SETUP menu on the instrument you carry with you (Master). Set duAL to rtE. When measuring, the Master instrument shows with small digit the relation: Master in % of the reference instrument: (Master / Slave)*100%. The relation is the same calculation regardless of what the Master instrument displays with big digits. The relation is very handy when doing ventilation system adjustments according to the proportional method.

Balancing a ventilation system according to the Proportional method:
First decide where to place the reference instrument. The flow according to the drawing at this place is the nominal reference flow. The other measurement points are adjusted with the Master instrument. We call these nominal flow values from the drawing nominal Master flows. Use projected flows from drawing. Calculate for each Master measurement point: (nominal Master flow/nominal reference flow x %100). These are the relations that you shall obtain when you have balanced two diffusers/inlets/outlets. (Shown in small digits on the display.) Measure with the reference instrument on the reference in/outlet and the Master instrument on the in/outlet you want to adjust. The relation is important and not the actual flow. The final flows will occur when the final adjustment of the total flow in the ventilation system is done. The big digits on the display alternate between the measured values of the Master and the reference instrument. The measured reference value is marked wit a *. When 2 different units are measured with the Master and Reference instrument, no % relationship is showed. Instead the normal mode measurement is displayed for the Master instrument. When alternating to the reference instrument "rtE" is displayed together with measured value. The alternation speed is based on the Flash-time. (set FLSH-time in Setup-Menu.) By pressing AVG you can continuously show either Master or Reference instrument. By pressing CLEAR the instruments starts to alternate again.

52

Turning off SwemaTwin is done by selecting oFF at duAL in the SETUP menu or by turning off the instruments. When no connection is establish between the Master and Reference instruments. The Small digits will be ---- and the big digits ----- when trying to show the Reference instrument. Charging of modem: 1.5hours, charger is constantly lit – charging. Charger blinks – battery is charged. If the charger blinks after 0,5 hours you need to start charging once more. The battery packs delivered by Swema supplies the SwemaAir 300 with power. One charge is good for 5-10 hours use.

SETUP menu
The SwemaAir 300 has a number of entered values which may be relevant for you to use. Proceed as follows: Start the SwemaAir 300 with ON/OFF, wait until you are in the measuring position. Press and MODE simultaneously. You will move into SETUP where you last left it. The first position is the air pressure (atmospheric pressure). Change position with MAX and MIN. The display will then look like this:

I0 I3
mode

Atmospheric pressure is used when SwemaAir 300 does calculations that involve air density. That comes in to effect for air velocity (SWA 31, SWA 03 and SWA07 and SWA 10 with pito static tube), differential pressure with SWA 10 or 07 and also when measuring air flow with the flow capture SwemaFlow 125 or 65. If you want to make a change, press ENTER and the first digit will start to flash, change it with MAX or MIN and move to the next digit with ENTER. When you are satisfied, press MODE and you will return to the measuring position. When you have turned off the instrument and turned it on again, the air pressure returns to 1013 hPa. The air temperature °C is also used for calculating the air density. The Setup value is used only for air velocity and flow measurement with SWA 07 and SWA 10 while they do not measure the air temperature. All other sensors compensate for temperature themselves. Use the same procedure as for the air pressure to change the temperature setup value. Here follows the other SETUP values and settings: %RH relative humidity. (not used in any calculations.) duAL: set to rtE for SwemaTwin communication between 2 SwemaAir 300.

HPA

53

Only for SWA 10: SAFE or FAST decides if the valve should operate to check the zero point of the differential pressure. You can select units EU = European, US = American. In the Flo mode, you can specify that you want to total all of the flow measurements in each file ("Add"). In the Prot mode, you can specify whether you want a short ("Shrt") or long ("Long") report in the AP mode.
mode

l/s

m/s

EU
cm

°C

I
You can select the number of decimals on the display with mode dEC m/s and mode dEC °C.
mode

DEC

°C

FLSH = flashtime. Here you can select the time during which you want the SwemaAir 300 to show e.g. the number of measurements before the SwemaAir 300 returns to the measuring position. The Flashtime also controls the alternation rate for SwemaTwin.

I.5
mode

FLSH
bAUd = baud rate indicates the speed used in communication e.g. with printer. With LAng mode you can change the language of the printout. 1 = English, 2 = German, 3 = Swedish , 4 = Finnish, 5 = French, 6 = Japanese, 7 = Danish, 8=Norweigan, 9=Dutch, 10=Polish You can specify whether you want to us a comma, C--A, or a period, P--t, as the delimiter that separates decimal digits from main-number digits in your files.

C--A
mode

To use the default setting for any of the SETUP options, you can move to that option and then press CLEAR.

DECS

54

Checking the zero point on the air velocity probe SWA 31 and the Draught probe SWA 03.
When the air velocity probe is retracted or when the protective tube is covering the probe on the Draught probe, the SwemaAir 300 does not always show the velocity 0. If the zero point deviates more than ±0.03 m/s, the zero point should be adjusted - send the probe in for calibration. The zero point is defined using a cylindrical enclosed space with a min. diameter of 30 mm and a min. height of 65 mm. The cylinder must not be exposed to thermal radiation. The temperature must be as stable as possible.

min. ?30

min. 65

55

Calibration protocol
The probe memory contains the calibration protocol for the probe. That meens that you can print it out when ever you want, for exemple to show a customer when the probe was calibrated. If you want the calibration protocol to be printed, switch off the SwemaAir 300 and connect it to a printer or PC. Press ENTER while pressing ON/OFF briefly and the calibration protocol for the connected probe will be printed. Press MODE while pressing ON/OFF to get an instrument protocol. To the right you can see an exemple of what the calibration protocol looks like, in this case to a air velocity probe, SWA 31. Normally there is no calibration protocol in the SWA 25 temperature handle and cables for humidity probes and CO2. The temperature probes are delivered according to DIN 43760. Humidity probes and CO2 instrument are factory calibrated. You have to demand an extra protocol for these probes.
Probe cal. protocol -------------------Software ver.: 1.83 Type: 101 Termistor Model: SWA 31 S/N: 103 Manufact. date: 1994-06-17 Cal. date: 1994-06-21 Cal. setup: SWEMA2 (TO) Next cal. date: 1995-06-21 Air pressure (hPa): 1006 Humidity (%RH): 35 True val. --------1.00 m/s 2.00 m/s 3.00 m/s 5.00 m/s 7.00 m/s 10.00 m/s 22.0 dgC Read val. --------0.99 m/s 1.96 m/s 2.93 m/s 4.87 m/s 7.00 m/s 10.0 m/s 22.0 dgC Corr ---0.01 0.04 0.07 0.13 0.00 0.0 0.0

56

How to transfer data from SwemaAir 300 to Windows
Windows 3.11
Connect your SwemaAir 300 to the COM1 (or COM2) serial port on your PC and press ON. Enter the notebook or logbook by pressing + . Start WINDOWS on you computer and select ACCESSORIES, then TERMINAL, then SETTINGS, then TERMINAL PREFERENCE Buffer-store lines = 399 Click on OK Select SETTINGS again and then COMMUNICATIONS Baud rate Data bits Stop bits Parity Flow control Connector (Port) Click on OK Select FILE, then SAVE AS Save the terminal settings to a file which you name SWA300.TRM Click on OK IMPORTANT: You only need to do this the first time you want to read data into WINDOWS. After the first time, you can proceed as follows: Start WINDOWS on your computer and select: ACCESSORIES, then TERMINAL, then FILE, then OPEN Select SWA300.TRM. Then select TRANSFERS RECEIVE TEXT FILE Now specify the name of the file that is to be created to receive your readings and give the filename an extension of .txt (CASTLE.TXT for example). Click on OK WINDOWS is now ready to receive data from your SwemaAir 300.

9600 8 1 None Hardware COM1 (or COM2)

57

To transmit, you proceed in the same way as for outputting/printing, i.e. you press NOTE/PRINT. Your data is being transmitted to a file named castle.txt . When all data has been transmitted, you click on the CANCEL button in the lower left-hand corner of the screen. You can now close the terminal and start WRITE, WORD or EXCEL where you select: OPEN, and then CASTLE.TXT in the WINDOWS directory. You can now edit your reports yourself. If you do not have more than about 45 reports, there will be room for them in the terminal memory. In such case, you can transfer the contents directly to the terminal and then use "Copy", whereupon you can paste the copy into WORD or WRITE for example.

WINDOWS 95, 98, NT, me, 2000, XP Setup
Connect your SwemaAir 300 to Your serial port COM1 (or COM2) and press ON. Go to the logbook by pressing * + *. When WINDOWS 95 is started, first chose: START, then (All) PROGRAM then ACCESSORIES, then (Communication then) HYPERTERMINAL Click on the HYPERTRM.EXE icon. Now the program starts and the box CONNECTION DESCRIPTION opens: Give the new connection the name: SWA300, chose an icon and click OK. The next box that opens is TELEPHONENUMBER: On the line Connect using: chose Direct to COM2 (COM1) and click OK. Now the box COM2(COM1) PROPERTIES opens: Choose the following: Bits per second: 9600 Data bits: 8 Parity: None Stop bits: 1 Flow control: Hardware Then click OK. Choose VIEW and FONT Coose TERMINAL and click OK. Choose FILE and SAVE the setups with the name SWA300. Now the HyperTerminal is ready to receive data.

58

Note! The above you just have to do once in the future do the following:

Transmitting by storing in a file. (recommended)
When WINDOWS 95 is started, first choose: START, then PROGRAM then ACCESSORIES, then HYPERTERMINAL Click on the SWA300 icon, then on Transfer, then Capture text Now choose a name for the file that will recieve your data. Important: you must specify path and name. Ex: C:\library\library\test.txt Click start Now the Hyperterminal is ready to recive data from your SwemaAir 300. You transmit in the same manner as you do a printout. Press the NOTE/PRINT long. On the screen you now see your data being transmitted. When all data is transmitted you click: File Exit Yes (Answer ”Are you sure you want to disconnect now?) Now you can close the Hyperterminal and start Wordpad, Word or Excel. This is how you do in Word 6.0: File Open Choose textfiles (*.txt) Choose file ”test.txt” Convert form MS-DOS-text if necessarily Now you can edit your protocols.

Transmitting without storing in a File
When you do not have more than 500 lines in your SwemaAir 300 you can more easily do the following: Start transmitting in Hyperterminal by clicking on the SWA300 icon. Now directly press long on NOTE/PRINT. Transmitted data now enters the Hyperterminal buffer. Use Copy and start Word, Excel etc and use paste.

59

Data cable running to the PC
The 12-contact connector on the cable from SwemaAir 300 and the 9-contact D-SUB connector on the PC are connected as follows: 9-contact 2 3 5 7 4 6 Colour 12-contact B G D 6 together

Green C Brown Yellow White Connect 4 &

60

DPU-201 printer
The following is a brief, simple description of how to use the printer in your SwemaAir 300 system. Note that this is to be considered an overview. You should also read the printer manual.

Mains connection
Always connect the mains power adapter to the printer first and then to the wall socket thus eliminating any chance of coming into contact with the power adapter plug while it is live. Similarly, you should remove the plug from the wall socket before removing the mains power adapter connector from the printer. When you use the printer together with the mains power adapter, the switch must be set to ”ON 2”. If it is not, power will be taken from the batteries.

Battery charging
To charge the batteries in the printer, set the switch to the ”ON 2” position and connect the mains power adapter. Allow the printer to charge for 15 hours. When charging is finished, set the switch to the ”OFF” position.

Inserting new paper
To insert a new roll of paper in the printer, you must first cut off the end of paper to form a straight edge. Then turn on the printer and lift the paper holder cover. Insert the end of the paper in the groove as shown in the illustration in the printer manual and press ”PAPER FEED”.

DIP switches
The DIP switches must be set correctly in order for the printer to function properly with your SwemaAir 300. You will find the DIP switches behind the cover on the side of the printer located beside the data cable connector. The switches must be set as follows: DIP 1 2 3 4 5 6 Setting ON ON ON OFF OFF ON Explanation Data lenght: 8 bits Parity: None Not used Baude rate: 9600

Connecting printer to SwemaAir 300
Power to the printer must be turned off when you connect it to your SwemaAir 300. After connecting the data cable to the printer and to your SwemaAir 300, you can turn on power to the printer.

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Technical data
General
The accuracy for each probe is stated below is the accuracy for the probe together with the SwemaAir 300. That is, included in the accuracy for each probe is the accuracy for SwemaAir 300, interchangeablity, calibration, temperature dependence, hysteresis and repeatability. The user should correct the measured values with the correction on the calibration protocol to obtain stated accuracy. Tested according to EN 50081-1 and EN 50082-1.

SwemaAir 300 instrument:
Memory capacity, Current-independent: notebook - logbook Interchangeability accuracy Analog Output Digital Output

Operating range SwemaAir 300:

0...+50°C approx. 200 notes or 1500 pairs of values or 2500 singel values Negligible in relation to accuracy of probes. Analog 2x/ sec. (Option T 10x/sec.) RS232, send : SwemaAir 300 sends the displayed value(big digits) (Transmitting rate max 5 times/second) 9V IEC 6 F22 6 to 10 hours, depending on probe and air velocity, with alkaline battery.

Battery Battery life

By pressing MAX * MODE in that order and at the same time with the probe connected and then CLEAR the SwemaAir 300 presents the software version with big digits and hardware with small.

Draught probe, SWA 03:

Measuring range of velocity Measuring media Accuracy at 23°C: at 10…34°C: Response time of velocity sensor Measuring range of temp. Accuracy Outputs Probe Calibration:

0,05...3,0 m/s at +10...+34°C Dry and moist air, non-aggressive gases ±0,03 m/s at 0,05... 1,00 m/s ±3% read value at 1,00...3,00 m/s ±0,04 m/s at 0,05... 1,00 m/s ±4%read value at 1,00...3,00 m/s 0,2 sec. +10...+40°C ±0,3°C at 20°C ±0,5°C at 10...+40°C 1V/m/s, 10 mV/°C Recommended every 6 months.

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Air velocity probe, SWA 31:
?8mm at top, ?10mm first step on telescope (handle) Measuring media Dry and moist air, non-aggressive gases Measuring range of velocity 0,1...30 m/s at -10...+45°C
Accuracy at 20 °C at other Measuring range of temp. Accuracy Outputs Probe Calibration 0,10...1,33 m/s ±0,04 m/s 1,33...30 m/s ±3% of read value 0,10...1,10 m/s ±0,05 m/s 1,10...30 m/s ±4,5% of read value -20...+80°C ±0,3°C at 20°C ±1,0°C at -20...+80°C 100 mV/m/s, 10 mV/°C Recommended every 12 months.

Pressure probe
Pressure range Max. overload Accuracy

SWA 10:
-300…1500Pa ±20 000 Pa ±1% read value Minimum 0,3Pa 0,2Pa/°C

SWA 07:
±7 000 Pa ±35 000 Pa ±1 Pa ±2% read value After zeroing: ±0,3 Pa ±2% read value 0,4 Pa/°C 0,1 %FSO/year 0,1 %FSO/year

Temperature dependence Long-term stability, Zero point Full measuring range Measuring media Outputs Probe Calibration

Dry and moist air, nonaggressive gases 1 mV / Pa, 100mV / m/s Recommended every 12 months.

Temperature SWA 25 / 53 / SWT 315 / 215 / 221:
Measuring range with SWT 39 Interchangeability accuracy Probe Calibration Sensors Outputs -50...+280°C max ±0.3°C Recommended every 24 months. According DIN 43760 (approx. ±0.5 °C at room temperature.) 10mV/°C

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SwemaFlow 125:
Flow measurement range: 2-125 l/s (7 - 450 m3/h) The instrument always displays 0 when the flow is below 2 l/s (7 m3/h). Dry and moist air, non-aggressive gases ca ± 3% read value, min ± 1 l/s -10...+50 °C ± 0.3 °C at 20 °C ± 0.5 °C at other Recommended each 6:e month. ca 1 hour 10mV / l/s

Measuring media Accuracy: Temperature range Accuracy: Probe Calibration: Battery charge time: Outputs

Pressure drop SwemaFlow 125
30 25 20 15 10 5 0 0 25 50 75 Flow (l/s) 100 125 150 Pressure drop (Pa)

SwemaFlow 125 is recyclable. Return it to Swema when you want to recycle.

SwemaFlow 65:

Flow measurement range:

Measuring media Accuracy at 18…30°C: at 10…18, 30…40°C Probe Calibration: Battery charge time: Outputs

2-65 l/s (7 - 230 m3/h) below 2 l/s the instrument displays 0. Above 65 l/s the display blinks then the value is uncertain. Dry and moist air, non-aggressive gases ± 4% read value, minimum ± 1 l/s ± 6% read value, minimum ± 1 l/s Recommended each 6:e month. 3 hours 10mV / l/s

64

CO2 Cable to Airtest:
Temperature range Linear range 0-50 °C 0-3500 mV, where 1mV/ppm

Humidity and Temperature SWA 11-14 + cable and Hygroclip + cable:
Relative Humidity range Measuring media Accuracy SWA 11…14 at 23°C Hygroclip at 23°C Temperature range SWA 11…14 Special probes Hygroclip Accuracy temperature Output signal Probe calibration Water content 0...100%RH Dry and moist air, non-aggressive gases ± 1,6% at 10...90%RH others ± 2,6%RH ± 1,6% at 0...100%RH -20...+60 °C up to +200 °C -40…+85.°C ± 0,3 °C 1 V / 100 %RH, 10mV/°C Recommended each 12 months. ppm weight

Problem Solving
If an error is taking place in the instrument or with a probe the display indicates error and a number. After 1 minute the instrument will shut down. Errors 1215 you may correct yourself. For corrections of other errors you must contact your supplier. The Probe has lost connection with SwemaAir 300. Disconnection or short circuit in the probe. Disconnection or short circuit for temperature sensor or connection to SwemaMan 2000. Con SWA10 is not firmly connected . Turn locking ring. 5 The Probe does not valid for this program version. 7 The Probe memory is not updated for the new program version. 8 The probe memory must be reprogrammed. 9 Wrong checksum in the probe nonvol-RAM 12-15 Turn the instrument off, hold * pressed and turn the instrument on again. Now, error should no longer show. If it does, contact your supplier or Swema. 16 No connection with the prints nonvol-RAM 17 The hardware is not updated for the new program version 1 2 3

65

18 19 27

The prints nonvol-RAM must be reprogrammed. Wrong checksum in the print nonvol-RAM The software is not updated for this probe. New EPROM needed. 35 Hardware (print) upgrade and D/A-calibration is needed for this probe. 37 Hardware (print) upgrade is needed for this probe. High error with SwemaFlow 125 – overrange, send SwemaFlow 125 for repair at Swema.

Guarantee conditions
1. SWEMA provides the original purchaser of this instrument with a guarantee covering original defects in materials or manufacture for one (1) full year from the original delivery date. Utilization of the guarantee for any part of the instrument does not extend the guarantee period beyond the limit of one year from the original delivery date. Batteries are not covered by the guarantee nor are any defects which arise out of failure to follow the instrctions nor defects arising as a result of normal usage, wear and tear, omitted maintenance, unsuitable storage or neglect, unauthorized tampering and repairs carried out by a technician not recommended by SWEMA. 2. 3. Claims under the guarantee must be made in writing before the expiration of the guarantee period. Should SWEMA find the product defective as indicated and claimed for under the guarantee conditions, SWEMA has the right to choose between reparing the product free of charge or replacing it with another product in perfect condition. If a claim under the guarantee is made the product must be returned to SWEMA, carriage paid. SWEMA will pay the return carriage. Goods forwarded COD will not be accepted. 4. SWEMA's liability for defects is limited to what is stated above. Accordingly, the purchaser is not entitled to claim compensation for direct or indirect damage or loss or submit any other claims in consequence of defects besides those specified in the foregoing.

66

Index
Page

AF Air Air Air

(average Flow) Flow SwemaFlow 125 Flow SwemaFlow 65 velocity sensor SWA 31 direction dependency in duct sweeping method Airtest, measuring with AP mode (Average Point) APF mode (Average Point Flow) Area, selecting as desired rectangular Circular non standard Circular standard Selectable Area AS mode (Auto Sampling) ASF mode (Auto Sampling Flow) Atmospheric pressure AVG Battery SwemaAir 300 SwemaFlow 125 SwemaFlow 65 Baud rate bP (Back pressure) Calibration protocol CLEAR Collect readings CO mode (Comfort) CO2 Collecting values CON Connections Connectors Contents Data cable to PC Datalogger Decimals, selecting °C, changing default setting Dew point Diameter, selecting default Diameter, selecting as desired Digits, changing Display dPF mode (Diff. Pressure Flow) Draught probe SWA 03 Draught rating (DR) Ducts, measuring flow in Duct factor, k2

7; 41, 48 41 48 11 11 17 24 50 7, 12, 36,41,48,50 7, 17, 37 18-21 18,20 20 19 21 7, 23, 34 7, 24 52 6 10,47 10 47 49 50 7, 42 55 6 12, 23 7, 33 50 12 35 9 9 1-3 59 25-28 52 51 32 19 20 19-21 10 7, 37 33 7, 34 39 19, 21, 40

67

Effective area 7 ENTER 6 FAST 35, 36, 52 FILE 28 File menu 5-6, 16 Files 16, 26 closeing, erasing, printing 16 changing 16 Flash time 53 Flow totalling 52 Flow to high for display (APF) 22 *Formula, flow 36-39 air velocity (Pito static pipe) 36 Guarantee conditions 65 Height and width, ducts 20, 24 Humidity measurement 32 Dew point 32 Relative %RH 32 Water content 32 Hygroclip 32 Inserted constants, changing 52,53 Instrument 8 Key functions in different menus k-factor (C), k2 factor Language, selecting LOG mode Logbook erasing printing viewing LOGP mode Long report MAX Measurement mode Measurement plan, recommended Measuring time SwemaFlow 125 Memory, how much remains Memory - logbook Memory - notebook Menus MIN MODE Mode, changing AF (Average Flow) AP (Average Point) APF (Average Point Flow) AS (Auto Sampling) ASF (Auto Sampling Flow) BP (Back Pressure) CO (Comfort) dPF (Differential Pressure Flow) LOG LOGP 6 37-39 19,21,40 53 7, 25-27 29 29-30 29 29 7, 27 15, 52 6 5-6, 12 40 41 30 25 14 5-6 6 6 17 7, 41, 48 7, 12, 36 7, 17, 37 7, 23 7, 24 7, 42 7, 33 7, 37 7, 26 7, 27

68

Notebook,

file system storing in printing out viewing clearing NOTE/PRINT ON/OFF #Outputs Parameter menu PASS PC cable PC, transmit to Position dependency of SWA 07 Power supply, external Pito static tube Pressure probe SWA 10, 07 Measuring program APF Measuring program dPF position dependency zeroing Printer DPU-201 Problem solving Program Program menu Rectangular ducts, selecting H x w Reminder list for mode APF Report, passivate printing viewing

14 16 16 15 14 15 6 6 9 5, 6, 18 15 59 56-58 36 9 36 35 37 36 35 60 64 7 5, 6 20, 24 22 15 14 14 23 16 14 5, 6, 52 10 6 12 33 35 36 35 35 32 31 11 11 24 41 41 41 42

37

Sampling frequency Saving individual readings SEE SETUP menu Shut down time Starting measurement Starting, what you must read before4 SWA 03 SWA 07, position-dependent zero-setting SWA 10 SWA 11-14 SWA 25 SWA 31, direction-dependent Sweeping method SwemaFlow 125 Flow capture key measuring program AF measuring program bP

69

measuring time measuring advice Pressure drop SwemaFlow 125 Stabilizing the flow Throttle ring SwemaFlow 65 SwemaMan 2000 SwemaTwin Technical data Air Flow SwemaFlow 125 Air Velocity SWA 31 CO2 cabel differential pressure SWA 10,07 Draught probe SWA 03 Humidity SWA 11-14, Hygroclip SwemaAir 300 Temperture probe SWA 25 Temperature, measuring SWA 25 Time interval, setting Time constant, setting Traversing (scanning / sweeping) Units, selecting l/s or m3/h Voltage Supply External Water content, PPM = mg/kg WINDOWS, communicating with WINDOWS 3.11 WINDOWS 95/ NT Working memory, clearing Zeroing SWA 10, 07 9

41 46 63 47 43 48 35 51 61 63 62 64 62 61 64 61 62 31 33 12, 23 24 19

32 56 56 57 12, 13, 32 13 35


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