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Analysis and judgment: After the pressure transmitter is used, its output current is often high. It may be that the zero point of the transmitter is not very stable and there is drift: it may also have water vapor in the gas gas for a long time. The pressure in the pressure tube has condensation Liquid sake. The specific analysis is: When the pressure tube is full of gas, because the density of the gas is very small, so the pressure into the transmitter (set to P0) and the pressure in the pipeline (set to P) equal, that is, P0-P. However, when there is condensate in the pipeline and its height is assumed to be h and the density is Ï, the transmitter pressure is P0=hÏg+P. That is, the transmitter pressure is a variable of hÏg. In this way, the output current of the pressure transmitter is higher by a value than the output corresponding to the actual pressure and changes with h.
Troubleshooting: It is necessary to install a condenser at the bottom of the pressure transmitter pressure tube, so that the high pressure indicating value of the pressure transmitter can be solved.
Pressure transmitter indication high value analysis and troubleshooting Fault phenomenon: pressure transmitter to measure the pressure of the pipeline, the measured medium is gas, pressure transmitter put into use, the output current is often high.
November 17, 2023