Root cause analysis for a differential pressure level transmitter that was installed to measure the level of a tank filled with water.

The DP type level transmitter started showing less value after the preventive maintenance job.

Differential Pressure Level Transmitter Problem Statement

A dry leg DP type level transmitter was installed in a tank that stores water. One leg of the transmitter i.e. high-pressure side is connected to the tank bottom while the other leg i.e. low-pressure side is connected to the top of the tank.

The LP side is dry leg type. The connection is from the top of the tank because the tank receives the water and then supplies the water as per the process need.