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Open Tank DP Level Transmitter Calibration

Schematic Diagram of a open tank DP level transmitter installation Open Tank DP Level Transmitter Calibration Formulas:

Min range = SG x h + P0
Max range = SG x h + P 0

Example:

If an X height is 10 meters and there is fluid in the tank which has a density of 0.85 g / cm3 what the calibration range of the transmitter?

SG = 0.85

Min range = SG x h + P0

= 0.85 x 0 m + 0
= 0 mH 2 O

Max range = SG x h + P 0

= 0.85 x 10 m + 0
= 8.5 mH 2 O

The transmitter calibration Range = 0 to 8.5 mH 2 O

Bubble Tube Level Measurement Principle February 28, 2017 at 3:43 pm

good evening sir,
what is SG,P0 plz tell me May 9, 2018 at 8:08 pm

Sir What is P0 May 10, 2018 at 2:08 pm

Hi,

SG is the specific gravity of the liquid inside the tank, P0 is the pressure of vapor inside the Tank , if the Tank is open to atmosphere than P0 = 1 bara = 0 barg. In the case above you can see that he is using P0 = 0 barg in the calculation because it is said that in this situation it is an open tank.

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