How do we calibrate a level transmitter(displacer type)in interface level. Lets say specific gravity of water/condensate=1/0.7
Interface level can be tricky I assume you are using ultra sonics with a target attached to the displacer and the displacer will obviouly float on the water level inter face. To do this the float should be filled to allow it to float on the water. THe range is then set by the height the water level rises. A second unit can also be used to float on the condensate in a similar manner to get a more accurate reading. This system works well given that no drastic changes in SG occur
If u r using a typical 4-20 MA O/P inst with a displacer float, then fill the chamber (100%) with higher density liquid. Adjust 4 MA. Then fill chamber with lower density/equiv. liquid (100%) and adjust 20 MA.