The probe does not have on-board pressure measurement. You can either configure a fixed setpoint value that is used as the pressure compensation, or set the probe to receive the pressure compensation value from an external pressure sensor.
| CAUTION Note that the pressure compensation input must be set up in order to receive accurate measurements. For pressure input options, see Pressure compensation input options. |
For pressure compensation, the recommended option is to receive the pressure measurement from an external pressure measurement instrument through the Ex ia (4–20 mA) input terminals on the MGP260 component board.
When using an external pressure sensor to provide the pressure compensation values to MGP260, note the following requirements:
- The external pressure instrument connected to MGP260 must output 4–20 mA and use absolute pressure units. The default range for the input is 1 … 1.6 bar(a).
- The analog input settings of MGP260 must be configured to match with the connected external pressure instrument. For instructions on configuring the MGP260 analog input settings with Vaisala Insight PC software, see Configuring environmental compensations with Insight and Configuring input from external analog pressure or temperature sensor.