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The flow meter is factory set to the ordered gas (medium).
If the setting for the process-gas modified or changed between calibration- and process gas, the changed
setting has to be sent to the transmitter. Use “send data to the transmitter and read ...” button.
The “active gas” to which the flow meter is set, you can see in the field basic information.
5.6.2. Change of the Standard Conditions
The flow meter is factory-set to standard conditions conforming to DIN 1343.
Factory setting: P
0
= 1013.25 mbar, t
0
= 0°C (273.15 K)
The corrected volume flow measured value is calculated in line with the standard conditions set.
5.6.3. Pressure Compensation
To achieve the highest measuring accuracy, the actual pressure can be entered in the field “pressure”.
The “Send” button is used only to send the process pressure to the transmitter.
5.7. External Pressure Sensor for Pressure Compensation
In order to achieve the highest accuracy, the input from an external pressure transmitter will be very useful if
the pressure fluctuates strongly (e.g. 3 to 10 bar (45 to 150 psi)). An absolute pressure transmitter with a
2-wire loop powered 4 - 20 mA output should be used.
On the tab “Pressure transmitter” the measuring range can be entered.
5.8. Bus Configuration
If the flow meter is equipped with an optional bus module, the data transfer rate and the network address can
be set on the “Bus configuration” tab.
The network address set is only used when the dip switches on the flow meter PCB are set to 255 (see page 14).
