calibration of instruments.

Answer Posted / narenkumar1985

calibration equipment: calibrator with hand-pump


1: connect the calibrator to the transmitter
2: connect the multimeter in series with transmitter to
verify the transmitter o/p in mA
3: Apply the pressure to the transmitter by hand pump
in calibrator
4: compare whether both calibrator and the transmitter
showing the same value.if you applied X psi through the
calibrator then the transmitter should have to show the
same value.If you find any error.Do the zero/span
Adjustment.by adjusting the zero/span screw
increasing/decreasing
5: compare the transmitter and calibrator as per follows
with a desired range of an instrument with o/p 4-20mA

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