Swema SwemaFlow 126 User manual

Operating instructions
vers 1.03 KE180618
SWEMA AB
Pepparvägen 27
SE-123 56 Farsta, Sweden
Tel: [phone]
[email protected]
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
7. PC-menu in instrument....... 9

1.
1. Introduction
Thank you for choosing a quality instrument from Swema.
SwemaFlow 126 measures air ow directly in l/s, m3/h or cfm
(when set to US units).
SwemaFlow 126 includes:
• Flow capture instrument
• Flow hood 300x300mm for exhaust ow (supply after calibration)
• Carrying case, USB-cable, charger, operating instructions
• Calibration certicate
Accessories:
Supply / Exhaust Flow hood 650x650 mm, h = 800 mm, Part.no: 769640
Cross for Swirl diffusers, Part no. 769650
Supply / Exhaust Flow hood 250x650 mm, h = 800 mm, Part.no: 760740
Exhaust Flow hood 300x300 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:
1,82 kg (including capture hood 300x300mm and throttle ring)

3. Function
The current ow is presented on the display two times per second.
Swema Flow 126 can display Real ow, by measuring air tempera-
ture and barometric pressure, or Standard ow.
On/Off (RED button)
Turn on and off the instrument by pressing the RED button. When
turning on the instrument, the display will rst show rmware ver-
sion and then battery voltage. It will then go into BP (Back Pres-
sure) mode. When ”Real” is displayed SwemaFlow 126 measures
the ow at actual temperature and barometric pressure. To change
to Standard ow ”std” (the ow is recalculated to a density at 20°C
and 1013 hPa) the free PC-program SwemaTerminal 3 is used. The
program can be downloaded at www.swema.com.
Turn on the display light by pressing the RED button while the BLUE
button is held down. The istrument is shot off automatically after
ten minutes if no button is pressed.
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).
2.

Flow hood selection
For supply ow, use a longer hood (650x650mm or 250x650mm) to
stabilize the ow.
The included 300x300 hood can be used for supply air if it gives the
same result on the valve type as one of the longer hoods.
All hoods to SwemaFlow 126 can be used for exhaust ow measure-
ments.
BP Mode (Back Pressure)
When measuring with any Flow capture the ow may be inuen-
ced by the Flow capture itself. The ow may be throttled. This can
be corrected by using the Back Pressure mode. By measuring two
times, with and without an extra throttle ring, SwemaFlow 126 cal-
culates the ow that reects the true ow with no capture interfe-
rence. 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 th-
rottle 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.

BP Measurement (BLACK button)
Place the hood with the sealing making a proper seal around the valve.
Start with or without the throttle ring and press BLACK button (but-
ton on the side). SwemaFlow 126 will wait 2 seconds to let the ow
stabilize 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 after
that make a measurement for 5 seconds during which the display
will show the measured value. When nished, ”P2” (Point 2) will be
shown in the display. Point 2 need to be measured within 1 minute,
otherwise SwemaFlow 126 will return to Point 1. Remove or put on
the throttle ring and press BLACK button again, SwemaFlow 126 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 has gone wrong and
the value might not be correct, and if so, make a new measure-
ment. By pressing GREY button, the lowest measurement of the two
points, with throttle ring, is displayed for 2 seconds before it returns
to the true value again. By pressing BLUE button, the higher of the
two points will be displayed for 2 seconds.
Save measurement (BLACK button long press)
When P1 and P2 is measured the measurement can be saved by
holding down the BLACK button for 2 seconds. The display will show
which note number the measurement is saved as and then return to
measuring mode.
If you don’t want to save the measurement just press short on
BLACK button and you will return to measurement mode without
saving.
4.

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, hold
down BLACK button for minimum 2 seconds when F1.00 is shown.
The rst digit will start ashing. Change value by pressing GREY or
BLUE button. When correct value is chosen, conrm by short press
of BLACK button and the second digit will start ashing. Repeat the
same procedure with the second and third digit. After the third digit
is conrmed the instrument will start measuring in F-mode. The me-
asurement 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 BLACK button is pressed down shortly the display will freeze the
measured value. ”Hold” is shown in the upper left corner of the dis-
play. Press BLUE button to toggle between the frozen values of air
ow, temperature and barometric pressure.
Release the frozen values by pressing down BLACK button for less
than 2 seconds.
Save measurement (BLACK button long press)
If a measurement is frozen it can be saved by holding down BLACK
button for 2 seconds. The display will show which note number the
measurement is saved as in the note book and then return to mea-
suring mode.
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-
play 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.
5.

Note book (notE)
If, in BP Mode, GREY button is pressed two times ”notE” will be dis-
played. To enter the note book, press 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 no-
tes. To return to ”notE” press RED button.
To read saved measurements 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 2 seconds, ”E ALL” (Erase
All?) will be shown in the display. To erase the note memory, hold
down the BLACK button for 2 seconds, ”E ALL” (Erase All?) will be
shown in the display. After all notes are erased ”notE” will be shown
in the display, press GREY button to go to BP Mode. Use the free PC-
program SwemaTerminal 3 to transfer saved data to PC.
6.

4. Charging
SwemaFlow 126 has built-in rechargeable Li-ion-batteries. Battery
charging time is approximatley 2 hours (reaches 80% in 1 hour).
The charger can be connected to the instrument longer without da-
maging 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. It is recommended not to use the instrument while charging.
Therefor the display is blinking as a warning during charging. Cau-
tion! Use only the original charger, other chargers might damage the
batteries.
Battery level
When the instrument is turned on, the display shows the battery
voltage level. With fully charged battery it will show 4.1 V, but will
soon go down to 3.8-3.9 V. When the voltage is lower than 3.1 V a
battery symbol is shown on the display. When the voltage is lower
than 2.8 V the instrument will automatically shut off.
5. Driver installation
To use SwemaFlow 126 with a Windows 10 PC, just connect the USB
cable and wait for the driver installation to complete. To use Swema-
Flow 126 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 on the instrument. The PC will
now install the necessary drivers automatically.
In case the driver installation doesn’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 in ”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. Informa-
tion of what kind of instrument and at which COM-port it’s connec-
ted can be found on the top left side. For SwemaFlow 126 it is only
possible to change settings in ”Terminal Window”.
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 126 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. There is access to change for example Averaging time, au-
tomatic shut off time and the possibility to erase saved data (Erase
Notebook).

”Averaging time”:
A higher ”Averaging time” will use more internal samples for the
averaging and give a more stable value.
”Real” or ”Standard ow”:
If set to ”Real” the ow shows as it is at present temperature and
barometric pressure. Standard ow is used to present the air ow at
standard conditions of 1013 hPa (29,9 inHg) and 20°C (68°F).
”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.
”Print calibration certicate” and ”Print Notebook”:
Show SwemaFlow 126’s calibration certicate and print the stored
measurements to the PC.
9.
7. PC-menu in instrument
After ”Terminal Window” is clicked a new window is opened. Press
”Enter” on the keyboard and the main terminal menu for Swema-
Flow 126 will be opened. To change a setting use the PC keyboard
and press on the corresponding letter.
SwemaFlow 126 Firmware: 1.02 Hardware: 0.9
[T] Averaging Time: 0.2 seconds responsive
[D] Density compensation: Real Flow
[S] Auto Shutoff: 10 minutes
[P] Print Calibration Certicate
[N] Print Notebook
[E] Erase Notebook
[O] Delimiter: Comma
[U] Unit System: US
[H] Charging: On
[ ] Space - Print Measurement Values

”Point” or ”Comma”:
Set point or comma as decimal separator for the print-out of stored
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).
”Charging On /Off”
NOTE! When transferring measurements values (with space), char-
ging should be set to Off because the measurement values can be
inuenced by the charging.
”Space”
Sends current measurement values to PC.
10.

SWEMA AB
Pepparvägen 27
SE-123 56 Farsta, Sweden
Tel: [phone]
[email protected]
www.swema.com