Question

Name ent VENT Activity 25-2-Specific Gravity Measurem It is desired to measure the specific gravity of a process fluid in a vessel using a differential pressure transmitter. The process fluid may have any specific gravity in the range of 1.050 to 1.150. The upper and ower d/p cell connections are below the overflow level in the vessel. The distance between the two connections is 96". The process fluid is corrosive to the d/p cell, but it is compatible with water, so water can be used to purge the d/p cell and the con- necting tubes. The d/p cell is located 10" below the PURGE SP. GR.1.0 PROCESS d/p CELL SP GR. 96 106 OVERFLOW 1.050 TO 10" HI LOW FEEDS AMETERS lower connection. PURGE WATER S Assune that the vessel contains fuid at a specific gravity of 1.150, the upper range limit. 1. Calculate the pressure head in inches WC on the d/p cell high-res connection 2. Calculate the pressure head in inches WC on the d/p cell low connection 3. Calculate the d/p cell differential. Assume that the vessel contains fluid at a specific gravity of 1.050, the lower range limit. 4. Calculate the pressure head in inches WC on the d/p cell h connection. 5. Calculate the pressure head in inches WC on the d/p cell low-pressure connection 6. Calculate the d/p cell differential. Perform the following calculations for the overall dip system: 7. Calculate the d/p cell calibration range and suppression or elevation. What changes would occur to the d/p cell calibration if the transmitter were located at a 20" lower elevation? 8.

Answer 1

In this solution some standard formulas are used. For more information on them kindly refer to any standard textbook or drop me a comment below. Don't forget to give a positive rating if you end up with a better understanding.

her nouli's prinoble, the-pressure-ot-lower-

tvou2ケーin-the-purge -pipes 乙 aLd 2-9 乙 9 2 クラ

-sine-- f recrure-.at-whit-top.cit 스 Cw oli f feient i al

1-7 Dlp Cell data' mee s t

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