Calibrate the differential pressure transmitter on-site using several digital pressure gauges
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Calibrate the differential pressure transmitter on-site using several digital pressure gauges
One is sufficient. It seems that there are currently no specific guidelines for calibrating differential pressure transmitters; what people do now is to leave one of the pressure inlet ports of the differential pressure transmitter unused and calibrate it using the methods used for calibrating pressure transmitters. Therefore, only a digital display with high accuracy that meets the required standards is needed as the reference value
Generally, the digital display built into the differential pressure variator is used; if there are special requirements, an additional digital display can be connected in series and installed in a location at the site where it can be easily viewed.