Answer Posted / laxmidhar ,nmiet bbsr

we need,
miliamp source(giving supply to i/p)
i to p converter(pressure signal to control valve)
air supply(for input to i/p and control valve)
multimeter(miliamp check)
small screw driver(for adjust zero and span)
and check

4ma for 0
8ma for 25%
12ma for 50%
16ma for 75%
20ma for 100%

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