Seeking help with differential pressure flow meters
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There is a Rosemount differential pressure flow meter on site; I tested the pressures on the positive and negative sides, which were 68 kPa and -68 kPa respectively. Why does the differential pressure reading on the gauge show -9 kPa after it is put into use? Shouldn’t it be 0 kPa? Could everyone please explain it?
68 kPa seems to be the full scale of the differential pressure.
Oh, right, it’s at full scale. When I activate it here, negative pressure is displayed. What could be the reason for that?
What is the current rating of this flow meter in amps? 68.3 is the flow measurement range. Use the handheld controller to check what the issue is – whether zero adjustment has been performed. It’s necessary to confirm that the negative pressure reading is -68 KPA. Is it possible for negative pressure to occur in the process? Was this meter calibrated before it was put into use?
68 is the value shown due to unilateral compression; it can only be displayed up to 68. However, this does not mean that the actual pressure is only 68. It’s possible that the pressure on the positive side is 300 and that on the negative side it is 291, resulting in a differential pressure of 9
It is necessary to determine whether the differential pressure transmitter is functioning properly, by checking for zeroing to verify the zero position and by testing under unidirectional pressure to check for pressure changes.