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If the deviations are too large (> 0.05 V or > 0.05 mA) between the signal issued and the value
displayed on the multimeter, we recommend that you return the transmitter to our factory.
9.2.3 Set the digital output (Modbus RTU)
"I/O Configurations" menu is displayed.
• Tap "Outputs".
• Tap "Digital Outputs".
Features of Modbus are displayed.
• Tap "Slave address".
• Define the slave address number between 1 and 255 then tap the back arrow on the top left of the screen.
• Tap "Baud rate".
• Select the baud rate between 2400, 4800, 9600, 19200, 38400, 57600, 76800 and 115200 then tap the back
arrow on the top left of the screen.
Default baud rate: 9600
9.3 Set the probes and modules
This menu allows to define relevant values related to the probes and modules connected to the transmitter and de-
fine some parameters linked to them:
• For an air velocity probe (hotwire probe): duct dimensions and type of section, the correction factor, the inte-
gration in air velocity and the compensation in atmospheric pressure for airflow calculation.
• For a pressure module: for air velocity and airflow calculation the duct dimensions and type of section, the air-
flow coefficient, the pressure probe coefficient, the integration in pressure and autozero duration.
• For a CO
probe: the compensation in atmospheric pressure
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• For an hygrometry probe: the compensation in atmospheric pressure for the psychrometry calculations
At least one probe or one module must be connected to the transmitter.
9.3.1 Normative values
For the airflow calculations, it is possible to convert the value into normative values (ex: Nm³/h).
The conversion can be done according to two standards:
• DIN 1343: 1013.325 hPa, 273,15 K (0°C)
• ISO 2533: 1013.325 hPa, 288,15 K (15°C)
"I/O Configurations" menu is displayed.
• Tap "Probes & Modules".
The screen displays the connected probes and modules.
• Tap "Normative values".
• Select the normative value according to your needs: DIN 1343 or ISO 2533 then tap the back arrow on the top
left of the screen.
9.3.2 Configure the compensation of a CO
A CO
or hygrometry probe must be connected to the transmitter.
2
Set the compensation in atmospheric pressure:
"I/O Configurations" menu is displayed.
• Tap "Probes & Modules".
The screen displays the connected probes and modules.
• Tap the line corresponding to the temperature/hygrometry probe or to the CO
• Tap "Atmo pressure".
• Tap "Unit" to select the atmospheric pressure unit.
• Tap "Atmo pressure" to enter a value. This value must be between:
Set inputs and outputs
or hygrometry probe
2
probe.
2
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