Differential pressure transmitter is a kind of instrument often used in the automation process, and is widely used in industrial equipment, HVAC, industrial gases, indoor and outdoor environmental monitoring, planting and breeding and other fields. In the process of using the differential pressure transmitter on site, users often encounter one or another problem, today the technicians of Xingyi will take you to understand how the differential pressure transmitter is troubleshooted during use.
Investigative Law The investigation method is to investigate the ignition, smoke, odor, power supply change, lightning strike, humidity, misoperation, mismaintenance and other conditions before the failure of the differential pressure transmitter.
Observation method The observation method refers to the observation of external damage of the differential pressure transmitter circuit, leakage of the pressure pipe, circuit overheating, power supply switching state, etc.
Detection method The detection method is divided into four parts: open circuit detection, short circuit detection, replacement detection and division detection. 1. Circuit break detection, separate the suspected faulty part from other parts to see whether the fault disappears. If it disappears, the fault is determined, and vice versa. 2. Short circuit detection, in the case of staff and site safety, the relevant part of the circuit is directly short-connected, such as: the output value of the differential transmitter is too small, the pressure guide pipe can be disconnected, and the differential pressure signal is directly led to both sides of the differential pressure transmitter from outside the primary pressure taking valve, and the output of the transmitter is observed to judge the blockage and leakage connectivity of the pressure guide pipeline. 3. Replacement detection, replace the suspected faulty part, and judge the faulty part. For example, if it is suspected that the differential pressure transmitter circuit board is faulty, a piece can be temporarily replaced to determine the cause. 4. Partial detection, the measurement circuit is divided into several parts, such as: power supply, signal output, signal transmission, signal detection, according to the part inspection, from simple to complex, from the table to the inside, narrow the scope, find out the fault location.
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