Calibration of displacer type level transmitter for interface level measurement
Calibration of any transmitter can be done by dry and wet methods. In the dry method, you need to calculate the equivalent input. And simulate it using the calculated IP. And for the displacer, you need to calculate the weight. Wet calibration is more simple you just need to use the process as the IP. Normally use dummy I/P. For interface level, first, you can fill the disp chamber with lither liquid up to 100%, then the o/p should show 4mA. Then drain the first liquid, second fill the chamber with heavy liquid up to 100%. The O/P transmitter should show 20mA.