1. When the pressure transmitter output is zero
a, check whether the polarity of the power supply is reversed
b. Short-circuit the test terminals and check whether the diodes inside the case are good or bad.
2. When the pressure transmitter cannot communicate
a, check the power supply voltage on the transmitter
b. Check the load resistance
c. Replace the electronic circuit board
3. When the pressure transmitter reads high or low
a, check the pressure variable readings
b. Perform 4~20mA output adjustment c, replace the electronic circuit board
d. Check if the pressure is blocked when the pressure is input.
e, check the test equipment
f, sensor adjustment
5. When the pressure transmitter reads irregularly
a, check whether the pressure input is blocked
b. Check the electromotive force interference
6. When the pressure is input, the pressure transmitter output will not change on the output of the pressure transmitter, and then the output of the pressure transmitter will suddenly change, and the pressure relief transmitter will not return.
a. In this case, check whether the pressure port is leaking or blocked. Check the wiring mode and power supply. If you check the sensor zero position normally, or if you press the simple pressure to see if the output changes, there is a change to prove that the sensor does not. Damaged, if there is no change sensor, it is damaged. Finally, consider the problem that may be instrument damage, or other parts of the entire system.
7, the pressure transmitter output signal is unstable
a, the pressure source itself is an unstable pressure
b, the instrument or pressure sensor is not strong in anti-interference ability
c, the sensor wiring is not strong
d, the sensor itself is very vibrating
e, sensor failure
8, the pressure transmitter is powered without output
a, wrong line (inspection of instruments and sensors)
b. Open or short circuit of the wire itself
c, the power supply has no output or the power supply does not match
d, the instrument is damaged or the meter does not match
e, sensor damage
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