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WHICH INSTRUMENT USED TO CALIBRATE CONTROL VALVE?
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Answer Posted / zuheir beilouni
Use a current source to calibrate the I/P converter error ,
but if the error was in the valve , calibrate the valve
positioner using Wallace and Tiernan calibration box or for
fast calibration couple a monostat gauge to calibrate and
if both were ok problem lies in the solenoid then check the
supply to it
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