Swema 03 Manual de usuario

Swema 03

Instructions

vers 1.01 MB20130530

SWEMA AB

Pepparv. 27

SE-123 56 FARSTA

Tel: +46 8 94 00 90

Fax: +46 8 93 44 93

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

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).

”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

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:

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

[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

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: +46 8 94 00 90

Fax: +46 8 93 44 93

[email protected]

www.swema.com

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