Swema SwemaFlow 125 User manual

Operating instructions
vers 1.23 CW20160601
SWEMA AB
Pepparv. 27
123 56 FARSTA, SWEDEN
Tel: [phone]
Fax: [phone]
E-mail: [email protected]
Web site: www.swema.com
Contents:
1. Introduction........................ 1
2. Technical data...................... 1
3. Function............................. 2
4. Charging............................. 7
5. Driver Installation................ 7
6. SwemaTerminal 3................ 8
with rmware update........ 10
7. Instrument PC menu............. 10

1. Introduction
Thank you for choosing a quality instrument from Swema.
SwemaFlow 125D measures air ow directly in l/s, m3/h or cfm
(when set to US units). The instrument is turned on and off with the
red button next to the display. When the instrument is turned on the
display shows rst the rmware version then the voltage of the bat-
tery. After a few seconds the instrument is ready for measurement.
The instrument is automatically turned off after ten minutes.
The measuring equipment includes:
• Flow capture instrument
• Flow hood 300x300mm for exhaust ow (Some valves also supply)
• Carrying case, USB-cable, charger, Operating instructions
• Calibration certicate
Accessories:
Supply / Exhaust Flow hood 650 x 650 mm, h = 800 mm, Part.no: 758950
Cross for Swirl diffusers, Part no. 769650
Supply / Exhaust Flow hood 250 x 650 mm, h = 800 mm, Part.no: 760740
Exhaust Flow hood 300 x 300 mm, h = 130 mm, Part.no: 761550
2. Technical data
Measuring range:
Air Flow: 1,5... 125 l/s, 5,4... 450 m3/h, 3.2... 260 cfm
Temperature: 0...+50°C, 32...122°F
Barometer: 600... 1200 hPa, 18...35 inHg
Measurement uncertainty:
Air Flow: ±3% read value, min 0,5 l/s
Temperature: ±0,5°C
Barometer: ±3,5 hPa
Back-pressure method uncertainty: ±10% min 1 l/s
At 95% coverage probability in non condensing, non moist air, <80
% RH, non aggressive gases
Measuring method:
Mass ow, net of hot wires
Weight:
1,975 kg (including capture hood 300x300mm and throttle ring )
1.

3. Function
The current ow is presented on the display two times seconds.
SwemaFlow 125D compensates automatically for the air density by
measuring air temperature and barometric pressure.
On/Off (RED button)
Turn on the instrument by pressing the RED button. When turning
on the display will go through a sequence showing rmware version,
battery voltage, ”Stnd” if set to display equivalent ow for standard
air density. It will after that go into BP (Back Pressure) mode. Turn
off the instrument by pressing the RED button.
Toggle the display light by pressing the RED button while the BLUE
button is held down.
Unit (BLUE button)
By pressing the BLUE button the display toggles between l/s, m3/h,
air temperature (°C) and barometric pressure (hPa). When set to US
units it toggles between cfm, air temperature (°F) and barometric
pressure (inHg).
Mode (GREY button)
Toggle between Back Pressure mode, Flow Factor mode and stored
values (notE) with GREY button.
2.

BP Mode (Back Pressure)
When measuring with any Flow capture the ow may be inuenced
by the Flow capture itself. The ow may be throttled. This can be
corrected by using Back Pressure mode. By measuring two times,
with and without an extra throttle ring, SwemaFlow 125D calculates
the ow that reects the true ow with no capture interference.
It doesn’t matter if you start to measure with or without the throttle
ring the important thing is that one measurement is with the throttle
ring and the other one without. It’s important where the throttle ring
is placed, when measuring with the throttle ring it should always be
placed after the hot wires in the sense of ow direction.
3.
Flow hood selection
For exhaust ow any hood size can be selected. For supply ow, use
a longer hood (650x650 or 250x650mm) to stabilize the ow.
The included 300x300 hood can be used for supply if it gives the
same result on the valve type as one of the longer hoods.

BP Measurement (BLACK button)
Place the hood with the sealing list making a proper seal around the valve.
Start with or without the throttle ring and press the BLACK button
(button on the side). SwemaFlow 125D will wait 2 seconds to let the
ow stabalize in the ow capture, the display will show ”P1” (Point 1)
and start to count up from 0 to 2 (the stabilization time). It will af-
ter that make a measurement for 5 second during wich the display
will show the measured value. When nished ”P2” (Point 2) will be
shown in the display. Within 1 minute Point 2 need to be measured
otherwise SwemaFlow 125D will return to Point 1. Remove or put on
the throttle ring and press the BLACK button again, SWF 125D will
repeat the same procedure as for P1. When nished the display will
show the True value without any inuence by the ow capture. If
the value is ashing it means that something is wrong and the value
might not be correct, if so, make a new measurement. By pressing
the GREY button the lowest measurement (with throttle ring) of the
two points are displayed for 2sec before it return to the true value
again. By pressing the BLUE button the higher of the two points will
be displayed for 2sec.
Save measurement (BLACK button held down)
When P1 and P2 is measured the measurement can be saved by
holding down the BLACK button for 2 sec. The display will show
which note number the measurment is saved as and then return to
measuring mode.
If you don’t want to save the measurement just press the BLACK
button and you will return to measurement mode without saving.
4.

Flow Factor Measurement (F-mode)
In Flow Factor mode the ow is multiplied with a ow factor (ow
factor 1.00 will not alter the ow). A ow factor can be used to com-
pensate for example a leakage. Warning: Changing to anything else
than 1.00 will alter the reading from calibration certicate. The dis-
paly will show the text ”Factor” when the instrument is in F-mode.
While in BP Mode change to F-mode by pressing the GREY button.
(Bp-mode does not use a Flow factor) The instrument will change to
F-mode and display F1.00 or the value of ow factor that the instru-
ment used last time in F-mode after being turned on. For example
F1.10 will multiply measured ow with 1.10 and display the result.
Take a measurement with a Flow Factor
To measure with the ow factor displayed next to F press BLACK
BUTTON for less than 2 seconds. To change the ow factor instead
hold down the BLACK button for minimum 2 seconds when F1.00
is shown. The rst digit will start ashing. Change value by pres-
sing GREY or BLUE button. When correct value is choosen conrm
by press shortly the BLACK button and the second digit will start
ashing. Reapet the same procedure with the second and third digit.
After the third digit is conrmed the instrument will start measuring
in F-mode. Measuring can be stored in the same way as in BP-mode.
To return to BP Mode press GREY button 3 times (First press will
show FX.XX, second will show notE and the third will take you to BP
mode).
HOLD function (BLACK button)
If the BLACK button is pressed down shortly the display will freeze
the measured value. ”Hold” is shown in the upper left corner of the
display. Press the BLUE button to toggle between the freezed values
(freezed air ow, temperature and barometric pressure).
Realese frozen values by pressing down the BLACK button for less
than 2 seconds.
Save measurement (BLACK button held down)
If a measurement is freezed it can be saved by holding down the
BLACK button for 2 sec. The display will show which note number
the measurment is saved as in the note book and then return to
measuring mode.
5.

Note book (notE)
If GREY button is pressed two times when in BP Mode notE will be
displayed. To enter the note book press the BLACK button. ”Note”
and the number of the last saved note will be shown on the display.
With GREY and BLUE button it’s possible to scroll through the saved
notes. To return to notE press RED button.
To see saved mearsurment in a note press BLACK button. With
GREY and BLUE button it’s possible to scroll through the saved mea-
surements in the note (air ow, temperature and barometric pres-
sure). To return to notes press the RED button. To erase the note
memory hold down the BLACK button for 2sec, ”E ALL” (Erase All?)
will be shown in the display. To return to notes press the RED but-
ton, to erase all notes hold down the BLACK button for 2sec. After
all notes are erased ”notE” will be shown in the display, press GREY
button to go to BP Mode.
6.

4. Charging
SwemaFlow 125D has built-in rechargeable Li-ion-batteries. Battery
charge time is approxematley 4h. The charger can be connected to
the instrument longer without damaging the battery. The battery
can also be charged with a USB cable connected to a computer. The
green led will have a xed light during charging, when fully charged
the green led will be turned off. You can use the instrument while
charging. Caution! Use only the original charger other charger can
damage the batteries.
Battery check
When turning on the instrument the display shows the voltage of
the battery. A fully charged instrument shows approximately 4.1 V
(it will drop to 3.8-3.9V quite fast). When the supply voltage is lo-
wer than 3.2 V a battery symbol will be visible on the display. When
the supply voltage is lower than 2.9 V the instrument will be auto-
matically shut off.
5. Driver installation
To use SwemaFlow 125D with a Windows 10 PC, just connect the USB
cable and wait for the driver installation to complete. To use Swema-
Flow 125D with an earlier OS driver matching .inf-les must be used
by the OS. The necessary les and drivers are automatically installed
with the free software ”SwemaTerminal 3”.
1. Download ”SwemaTerminal 3” zip-le from www.swema.com.
2. Unzip the le and run the setup le. When the setup is done con-
nect the USB cable to the PC and turn the instrument on. The PC will
now install the necessary drivers automatically.
In case the driver installation dosen`t succeed you can also do it ma-
nually. Open the device manager, right click on ”unknown device” and
then ”update driver”. The drivers can be found at ”C:/Program Files/
Swema” (make sure that the box ”include sub folders” is checked).
7.

8.
6. SwemaTerminal 3
With SwemaTerminal 3 it’s possible change settings, print stored
measurements, update rmware, print calibration protocol, do on-
line logging and store the logged data on your PC. Information of
what kind of instrument and at which COM-port it’s connected can
be found on the top left side.
”Flow”, ”Temperature” & ”Pressure”:
SwemaTerminal 3 shows the air ow, temperature and barometric
pressure that SwemaFlow 4000 is currently measuring.
”Averaging time”:
A higher ”Averaging time” will use more internal samples for the
averaging and give a more stable value.

9.
”Actual” or ”Standard ow”:
If set to ”Real” the ow shows as it is at present temperature and
barometric pressure. Standard air ow is used to present the air
ow at standard condition of 1013 hPa (29,9 inHg) and 20 °C (68 °F).
”Point” or ”Comma”:
Set point or comma as decimal separator for the the prinout of sto-
red values and for logged measurement to PC.
”US” or ”EU/ASIA”:
Set unit system to US (ft3/min, °F, inHg) or EU/ASIA (l/s, °C, hPa).
”Auto Shutoff”:
Set in minutes after how long time the instrument will be turned off
if not used. If set to 0 min the auto shutoff is disabled.
Log:
Press the ”Log” button to start an online logging of measured values
(can be saved as a txt-le). If the box to the left of ”Unit” is checked
the logged values will be shown/stored with chosen unit (m/s, fpm
etc.) With ”Freq:” it’s possible to set how often a new value should
be stored.
”Read calibration certicate” and ”Read Notebook”:
By clicking on ”File” a dropdown menu is opened. It’s here possible
to show SwemaFlow 125D:s calibration certicate and print the sto-
red measurements to the PC.

10.
7. Instrument PC menu
After ”Terminal Window” is clicked a new window is opened. Press
”Enter” on the keyboard and the main terminal menu for Swema-
Flow 125D will be opened. To change a setting use the PC keyboard
and press on the corresponding letter.
SwemaFlow 125D main terminal menu:
SwemaFlow 125D Firmware: 1.23 Hardware: 1.1
[T] Averaging Time: 0.5 seconds
[D] Density compensation: Actual Flow
[S] Auto Shutoff: Disabled
[P] Print Calibration Certicate
[N] Print Notebook
[E] Erase Notebook
[O] Decimal delimiter: Comma
[U] Unit System: EU/ASIA
[H] Charging: On
[ ] Space - Print measurement Values
Firmware update
On www.swema.com the newest rmware version will be possible to
download. To update the rmware rst download the new rmware
to your PC. Start SwemaTerminal 3 with the SwemaFlow 125D con-
nected to a USB port with the USB cable.In SwemaTerminal 3 click
on ”File” and then ”Update rmware”. A new window is opened, fol-
low the instructions in that window.
Terminal Window
Under the ”File” dropdown menu it’s possible to open a Terminal
window through SwemaTerminal 3 to access the instrument PC
menu.

SWEMA AB
Pepparv. 27
SE-123 56 FARSTA
Tel: [phone]
Fax: [phone]
[email protected]
www.swema.com