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Calibration Level Measurement

Open Tank DP Level Transmitter Calibration

Schematic Diagram of an open tank DP level transmitter installation
Open Tank DP Level Transmitter Calibration
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

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3 comments

gobind February 28, 2017 at 3:43 pm

good evening sir,
what is SG,P0 plz tell me

Reply
Mohammad Abusaba May 9, 2018 at 8:08 pm

Sir What is P0

Reply
azetou 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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Open Tank DP Level Transmitter Calibration

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