- If the transmitter signal is used for controlling, then put the controller on manual.
- Connect a digital multimeter in the current range in series with the transmitter output.
- Isolate the process valve
- Isolate the instrument isolation valve.
- Open the equalizing valve
- Open the bleed valve and de-pressurize the transmitter.
- Check for 4.00mA output signal, if not, adjust the zero screw.