Answer Posted / rajesh.

Compare to SAAB tank gauge measurement, DP level transmitter reading will not accurate. As the crude is viscous and it will choke up impulse tubing. It is better to install diaphragm capillary seal type Dp level transmitter. To calibrate Tx, Isolate primary valve of Hp and Lp tapping. depressurize Tx from manifold. check zero. measure the mmwc of tank and apply the value as per HP calibration.

what is wave length were using ?

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