- Pressure measurement received from an
external pressure measurement instrument through the Ex ia (4 … 20 mA) input terminals
on the MGP260 component board. This is the recommended option: for an example, see Figure 1. The wiring of the external pressure instrument input is shown in Wiring diagram.
Note that the Ex ia input of the MGP260 series probes is internally powered and isolated. Compatible Ex ia pressure instruments can be directly connected to the input terminal.
- Pressure measurement received from a Modbus master through a serial line connection.
- If the process pressure is constant, a fixed pressure compensation value can be configured into use.
The pressure compensation input settings (for example, input type selection and input scaling) of MGP260 must match the pressure input source used in your application. For more information on pressure compensation options and instructions on configuring compensation input settings with Vaisala Insight PC software or Modbus, see MGP260 Series User Guide.