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Physically observed that DP transmitter pressure reading show is higher than the calibrated range(range set 0 to 1000 mmH2O) during running of air compressor system when line pressure 0.33kg/cm sq
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The transmitter are going out of span and configuration is correct.
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What can be the issue? Please share suggestion to resolve
Yes, this is real process value. Check your process.
If required, rerange your transmitter and increase the measuring range.