Answer / himanshu amin

dp trasmitter is having range of few w/c. take example of
you want to calibrate 0-50 in h2o dp transmitter. connect
power supply and multimeter to connection point. connect
small hand pump to high side of dp transmitter. keep low
side of dp open to atmosphere. first check 4ma when both
connection are open to atmosphere. then connect hand pump
to high side and give 12.5, 25.0,37.5 & 50 in h20 and check
8,12,16,&20 ma o/p.

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