Pressure transmitter on-site fault inspection - Solutions - Huaqiang Electronic Network

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How to check the pressure transmitter on-site fault: Most of the faults on the construction site are caused by improper use and installation methods. There are several aspects summarized.
1. The primary component (orifice plate, remote measurement connector, etc.) is blocked or installed in the wrong form, and the pressure point is unreasonable.
2. Leakage or blockage of the pressure guiding tube, residual gas in the liquid filling tube or residual liquid in the inflation tube, deposits in the process flange of the transmitter, forming a dead zone.
3. The transmitter wiring is incorrect, the power supply voltage is too high or too low, indicating that the contact between the meter head and the meter terminal is poor.
4. It is not installed in strict accordance with the technical requirements, and the installation method and on-site environment do not meet the technical requirements.
The above faults will cause the transmitter output to be abnormal or the measurement is not accurate, but after careful inspection, strictly use and install according to the technical requirements, take effective measures in time, the problem can be eliminated, and the fault that cannot be handled should be transmitted. The device is sent to the laboratory or the manufacturer for further inspection.
Pressure transmitters are used to measure the level, density, and pressure of liquids, gases, or vapors, and then convert the pressure signal into a 4-20 mA DC signal output. Pressure transmitters mainly include capacitive pressure transmitters and diffused silicon pressure transmitters, ceramic pressure transmitters, strain gauge pressure transmitters, etc. Pressure transmitter When the pressure signal is applied to the sensor, the pressure sensor converts the pressure signal into an electrical signal, which is amplified by differential amplification and output amplifier, and finally converted into a liquid level pressure with the measured medium (liquid) by the V/A voltage current. A linear current-corresponding 4-20 mA standard current output signal.

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