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Reading: Closed tank Density Measurement using DP Transmitter with dry leg & constant level application
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Inst Tools > Blog > Density Measurement > Closed tank Density Measurement using DP Transmitter with dry leg & constant level application

Closed tank Density Measurement using DP Transmitter with dry leg & constant level application

Last updated: November 12, 2019 4:20 pm
Editorial Staff
Density Measurement Instrumentation Tools
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In closed tanks, the DP transmitter must compensate for the pressure of the vessel above the liquid surface. So the LP side of transmitter is connected to the tank. Here in this post we are discussing about calibration of DP transmitter for a closed tank with dry leg & constant level application for density measurement. This calculation tool only used for constant level application.

Closed tank Density Measurement

Density Measurement using DP Transmitter for closed tank with dry leg
Density Measurement using DP Transmitter for closed tank with dry leg
The minimum and maximum process specific gravities can be obtained from process datasheets.

The formulas for calculating the tranmitter LRV and URV are;

HP Side/LRV/4ma = LSmin

LP Side/URV/20ma = LSmax

Where

L = Closed tank maximum measured level
Smax = Maximum process specific gravity
Smin = Minimum process specific gravity

Note: This calculation is only used for closed tank with dry leg and for constant level application.

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