1. Check if the power supply of the differential pressure transmitter is reversed and if the positive and negative poles of the power supply are connected correctly.

2. Measure the power supply of the transmitter to see if there is a 24V DC voltage; It is necessary to ensure that the power supply voltage to the transmitter is ≥ 12V (i.e. the input voltage of the transmitter power supply is 212V). If there is no power supply, check whether the circuit is disconnected and whether the detection instrument is selected incorrectly (input impedance should be ≤ 2500).

3. If the pressure transmitter is equipped with a gauge head, it is necessary to check whether the gauge head is damaged (you can short-circuit the two wires of the gauge head first, if the short-circuit is normal, it means that the gauge head is damaged). If the gauge head is damaged, it needs to be replaced.

4. If there is a problem with the differential pressure transmitter, the ammeter can be connected in series to the 24V power circuit to check if the current is normal. If it is normal, it means that the transmitter is normal. At this time, check whether other instruments in the circuit are normal.

5. Is the power supply connected to the transmitter power input terminal? Connect the power cord to the power wiring port.