Siemens Pressure transmitters / differential pressure Transmitters, for flange type (Without remote seal)

The Transmitter Lower Range Value (LRV) and Upper Range Value (URV) calculations for a siemens pressure/differential pressure transmitters.

The following figures showing calculation formulae for different measurements like level, separation (interface), and density measurements for both Open & Closed Tanks using Flange Type Pressure/Differential Pressure Transmitters.

In below figures : P_MA & P_ME are nothing but LRV & URV of a transmitter.

LRV & URV Calculations for open containers / Open Tank

Notes

• For the separation layer (interface level) measurement, the separation layer has to be positioned between the two spigots. Also you must make sure that the level in the container is always above the top spigot.
• When measuring density, make sure that the level of the medium remains constant. The level should be above the top spigot

LRV & URV Calculations for closed containers / Closed Tanks

Reference  : Siemens manual