Small make up teach you how to check the failure in the process of using intelligent differential pressure transmitter! Release date: 2019 05 - 14 reading times: 0

Differential pressure transmitter is a kind of measuring transducer pressure difference on both ends of the transducer, output standard signal ( Such as 4 ~ 20 ma, 0 to 5 v) ; Differential pressure transmitter and pressure transmitter, unlike their 2 pressure interface, differential pressure transmitter generally divided into positive pressure side and suction side, under normal circumstances, the positive pressure of the pressure differential pressure transmitter should be greater than to measure the suction pressure. 1, disconnect detection: suspected failure parts and other parts of the separation, whether the fault disappear, if lost, determine the fault, otherwise can go to the next step to find, such as: unable to find a normal smart differential pressure transmitter, remote communication, can disconnect the power and the machine body connection, use the method of field and power for the transmitter to communicate to see whether cable cover about 2 KHZ electromagnetic signals, and interfere with communication. 2, short circuit test: in the case of security, related parts of the circuit short circuit directly, such as: small transmitter output value, can be directly from the differential pressure signal disconnects from the pressure valve to double differential pressure transmitter, observe the output of the transmitter, to determine the pressure pipeline jam, leakage connection. 3, change detection: differential pressure transmitter will doubt defective parts replacement, to determine the fault position. For example: suspected transmitter circuit board fault, can temporarily replace a piece, to determine the reason; 4, substation detection: measurement circuit is divided into several parts, such as: power supply, signal output, signal transmission, signal detection, part of the detection, from simple to complex, tester narrow range, find the exact location of the fault intelligent differential pressure transmitter.