WHICH INSTRUMENT USED TO CALIBRATE CONTROL VALVE?
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Answer Posted / ravi sankar
we can calibrate the control valve by using source meter
which is used to give 4 to 20 ma source to I/P , if any
error in the I/P ,we can adjust the zero or span of I/P.if
any error in the valve position ,adjust the zero or span in
the posisner of the control valve.
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