Answer Posted / rahul nayak
calibration is procedure in which we compares the readings
of our measuring instrument/transmitter with the reading of
standard & certified calibrated instrument/source. in the
same environment & working condition & adjusting our
instrument/transmitter readings to match with the standard
instrument readings by adjusting the SPAN & ZERO. If it is
not possible to adjust span & zero than we can only do
verification of our instruments not calibration.
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