Swema 03 User manual

Swema 03
Instructions
vers 1.01 MB20130530
SWEMA AB
Pepparv. 27
SE-123 56 FARSTA
Tel: [phone]
Fax: [phone]
E-mail: [email protected]
Web page: www.swema.com
Contents:
1. Introduction........................ 1
2. Technical data...................... 1
3. Install driver....................... 2
4. SwemaTerminal 3................ 2
5. Terminal Window.................. 4
6. Calibration and Adjustment.. 5
7. Advanced Settings.............. 5
8. RS 485 Modbus protocol...... 6
9. Firmware Update............. 7
10. Accessories.......................... 7

1. Introduction
Swema 03 is an omnidirectional anemometer for low air velocity (0,05...
3m/s) and air temperature (Swema 03+, Part no: 767361, measures
also barometric pressure). It has a high frequency digital output (Max
100Hz) and connects directly to PC with USB cable (Part no: 767300).
Swema 03 is powered by the USB.
When transporting and not using Swema 03 the very sensitive sensor
should be protected by the protection cage. When it’s time to start
measuring with Swema 03 gently losen the small screw at the bottom
of the protection cage and it will slide down and by that exposing the
sensor to free air. Lock the cage position with the screw and Swema
03 is ready for measurement.
To measure with one probe at a time and also to change settings for
the probe, download the free software SwemaTerminal 3 from our
website www.swema.com and connect the probe with the USB cable
(part nr. 767300).
Swema 03 can be set up with multiple probes with the PC-software
SwemaMultipoint (Part nr: 763710) or any other software connecting
with USB.
2. Technical data
Velocity: 0,05 - 3,00 m/s at 15 - 30 °C
Temperature: 10 - 40°C
Barometric pressure (Only Swema 03+): 600... 1200 hPa
T90 air velocity (90%): 0,2s
Sampling frequency: Max 100 Hz for one probe connected to PC.
Communication: USB & RS-485 MODBUS
Uncertainty:
Velocity:
At 23°C: ±0,03 m/s at 0,05...1,0 m/s, ±3% read value at 1...3 m/s
At 15…30°C: ±0,04 m/s at 0,05...1 m/s, ±5% read value at 1...3
m/s
Temperature:
At 23°C: ±0,3°C
At 10...40°C: ± 0,5°C
Barometric pressure (Only Swema 03+):
±3,5hPa
95% coverage probability in non condensing, non moist air,
<80%RH, non aggressive gases
1.

2.
4. SwemaTerminal 3
With SwemaTerminal 3 it’s possible to measure with a single probe.
You can also do online logging and store the logged data on your
PC, update rmware, print calibration protocol and change settings.
Information of what kind of probe and at which COM-port it’s con-
nected can be found on the top left side.
3. Driver installation
To be able to use Swema 03 with a PC or to change settings a driver for
the probe needs to be installed. The drivers are automatically installed
after installation of the of the fre software ”SwemaTerminal 3”.
1. Download ”SwemaTerminal 3” (is a 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 (Part no: 767300) between the probe and PC.
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).

3.
”Velocity”, ”Temperature” & ”Pressure”:
Swema 03 shows here the measured values of air velocity and tem-
perature and also what the barometric value is set to (Swema 03+
shows the barometric pressure it measuring).
”Actual” or ”Standard velocity”:
If set to ”Actual” the velocity shows as it is at present temperature
and barometric pressure. If set to ”Standard” the velocity is presen-
ted as it is at standard conditions (1013hPa & 20°C).
”Point” or ”Comma”:
Set point or comma as decimal separator.
”US” or ”EU/ASIA”:
Set unit system to US (fpm, °F, inHg) or EU/ASIA (m/s, °C, hPa).
Barometric Pressure:
Set the barometric pressure. Swema 03 will use the barometric
pressure set here to compensate for the air density. If it’s a Swema
03+ it’s possible to set a barometric pressure manually instead of
using the in-built barometer.
Averaging time:
Swema 03 has an internally sampling frequency of 100 Hz (100 me-
arsurement/s). With ”Averaging time” it’s possible to set a oating
averaging that is calculated of the internal sampled values. The read
out values from Swema 03:s digital output will be an average of the
internal sampling. A higher ”Averaging time” will use more internal
samples for the averaging and by that give a more stable read out
from the probe. Swema 03 will independent of set ”Averaging time”
always use an internally sampling frequency of 100Hz.
Zero below:
All the measured values of air velocity below the set value here will
be shown as 0 m/s.
Log:
Press the ”Log” button to start an online logging of measured values
(will 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.

Swema 03 - Software version: 1.00
[ ] Space - Print measurement values
[,] Comma - Print measurement values with units
[T] Averaging Time (0.01 - 1200 s, 0.1s for ISO 7726): 0.1 s
[B] Barometer pressure (manual): 1013.0 hPa
[D] Density compensation: Actual velocity
[O] Decimal delimiter: Comma
[U] Unit System: EU/ASIA
[Z] Display zero below: 0 m/s
[P] Print Calibration Certicate
[C] Calibration and Adjustment Menu
[A] Advanced settings
4.
5. Terminal Window
It’s possible to open a Terminal window through SwemaTerminal 3
to access some extra settings such as RS 485 communication setup.
In the terminal it’s also possible to adjust and calibrate Swema 03.
Click on ”File” in SwemaTerminal 3 and a drop down menu opens,
click on ”Terminal Window” and a new window is opened. Press
”Enter” on the keyboard and the main terminal menu for Swema 03
will be opened. To change a setting or enter a sub menu such as the
”Calibration and Adjustment Menu” or ”Advanced settings” just use
the keyboard and press on the corresponding letter.
Swema 03 main terminal menu:

5.
6. Calibration & Adjustment
If you want to calibrate and adjust Swema 03 press ”C” on the
keyboard when in the main terminal menu. In the Calibration and
Adjustment menu it’s possible to adjust the velocity and set a
temperature offset (with Swema 03+ it’s also possible to put in an
offset for the barometric pressure). It’s also possible in this menu
to save new calibration data. If an offset is put in a ”?” will appear
on several rows to show that something has been changed and new
calibration data is needed to be put in. Before you exit this menu
you will be asked if you want to save your changes or not. NOTE:
If you save changes done in the calibration and adjustment
menu it’s NOT possible to restore Swema:s original calibra-
tion data.
If you want to see how the changes looks like you can print a cali-
bration certicate by pressing ”P” in the main terminal menu.
7. Advanced settings
Press ”A” in the main menu and following menu will be opened:
ADVANCED SETTINGS for Swema 03+
[ ] Space - Print measurement values
[,] Comma - Print measurement values with units
[R] Time since Power on
[*] Activate for Firmware upgrade
[B] RS485 baud rate: off
[Esc] Exit
Press ”R” to get information for how long Swema 05 has been powe-
red on.
Press ”*” to activate the probe for rmware upgrade. It’s however
recommended to instead do the rmware upgrade through Swema-
Terminal 3 main window (see chapter rmware upgrade).
Press ”B” to activate RS 485 communication. When RS 485 commu-
nication is activated following settings will appear:
[B] RS485 Baud rate: 9600 bps
[P] RS485 Protocol: 0=none, 1=MODBUS: 0
[D] RS485 Address: 50
[E] RS485 Errors via USB: 0=off, 1=on: 0
[C] RS485 Check: 0=normal, 1=no CRC, 2=1s, 3=1s no CRC: 0

6.
[B]: Set baud rate by pressing ”B”. Choose baud rate between 4800
- 460800bps.
[P]: Press ”P” to choose RS 485 protocol. Set to ”1” if Modbus pro-
tocol should be used.
[D]: Press ”D” to set the RS 485 address for the probe, set an add-
ress from 1 to 247.
[E] & [C]: This is used for error checking and should only be used
by experienced users of RS 485. It’s recommended to have both of
these set to ”0” for normal usage.
8. RS 485-Modbus protocol
There are 3 supported commands for reading:
<33> will return 2 bytes representing the temperature
<34> will return 4 bytes representing the temperature and velocity
<35> will return 6 bytes representing the temperature, velocity
and barometer
Modbus data string:
byte 1 = Address
byte 2 = Command
byte 3 = Length of returned data
byte 4 = Low CRC for byte 1 - 3
byte 5 = High CRC for byte 1 – 3
byte 6 = Low CRC for returned data byte 1 - 5
byte 7 = High CRC for returned data byte 1 - 5
Command string in hex to read the temperature:
<0A> <33> <00> <95> <3F> <00> <00>
Example of response data in hex from probe. (2bytes):
<0A> <33> <02> <09> <6E> <09> <3C>
<09> <6E> = 2414/100 = 24.14 dgC
Command string in hex to read the temperature, velocity and
barometer:
<0A> <35> <00> <C7> <5F> <00> <00>
Example of response data in hex from probe. (6 bytes)
<0B> <35> <06> <09> <20> <00> <45> <27> <69> <A9>
<EF>
<09> <20> = 2336 /100 = 23.36 dgC
<00> <45> = 69 /1000 = 0.069 m/s
<27> <69> = 10089/10 = 1089 hPa

7.
9. Firmware update
On www.swema.com new rmware version will be possible to down-
load. To update the rmware rst download the new rmware to
your PC. Start SwemaTerminal 3 with the probe connected to a USB
port with the USB cable (Part no: 767300). In SwemaTerminal 3
click on ”File” and then ”Update rmware”. A new window is opened,
just follow the instructions given to you in that window.
10. Accessories
Part no Product
767300 USB cable, Swema 03/05 - PC
767610 RS 485 USB cable, RS 485 - PC
767630 RS 485 cable, Swema 03/05 - RS 485
767660 RS 485 3-way splitter
767670 RS 485 2m cable
767680 RS 485 5m cable
767690 RS 485 terminator
763710 SwemaMultipoint, software
SWEMA AB
Pepparv. 27
SE-123 56 FARSTA
Tel: [phone]
Fax: [phone]
[email protected]
www.swema.com