How to Determine if a Differential Pressure Transmitter is Operating Normally in the Field
Answer: Since the common faults in differential pressure transmitters are zero-point drift and blockage of the pressure guide tube, calibration of the scale point by point is rarely performed in the field. Instead, the zero-point and trend of changes are checked, as follows: Zero-point check: Close the positive and negative pressure shut-off valves. Open the […]