Answer Posted / chhote lal

it is a theortical calibration which done before mounted
Level Transmeter in the tank
suppose tank hieght is 10 meters
10 meter = 1000 cm
1000 cm = 10000mmwc
we know that 10000mmwc = 1kg/cm2
so we calibrate Level Transmitter 4mA at 0 kg/cm2(Air
Pressure)
and 20mA at 1kg/cm2 (Air pressure)
thus we calibrate Level transmitter

where proximity sensor installed on tank in loading arm application

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