General faults and maintenance methods of pneumatic instruments

Some issues are easily overlooked during the maintenance process of such instruments. For example, although the range of the differential pressure transmitter meets the technical requirements, its static pressure performance is poor and cannot truly reflect the measured parameters. So when calibrating differential pressure transmitters, it is necessary to ensure that the accuracy and range meet the requirements, as well as to ensure that the static pressure meets the technical specifications. So when repairing the transmitter indoors, it is necessary to first ensure that the static pressure is qualified, otherwise this meter does not meet the requirements. In addition, the positive and negative pressure chambers of the differential pressure transmitter are flushed with non measured media, which changes the relative density of the measured media and can also cause inaccurate indication. In this case, it should be discharged.