Answer / jeyaram

when we are using Differential Pressure.(diff. betw upstream
pr.& downstream pr.) for flow calculation , we have to apply
the formula ie..Flow is directly proportional to the square
root of Diff.Pr.

Answer / kishor deshmukh

actually the formula to calculate is expressed in terms of
the square root of change in the diffrencial pressure of the
flow at the upstream and downstream side of the dp cell so
we need to use the square root extractor.

Answer / bala murali

By using DP txr for Calculation of Flow we are enable squre
root in Txr.
This is bcoz the flow is directly proportional to square
root of Diff. pressure b/w HP and LP.

Answer / waqas abbasi ( ffbl )

Flow various directly as square root of different pressure
F=K square root of AP. since the flow various as the square
root of differential pressure the pin does not directly
indicate flow.flow can be determined by talking the square
root of the pin.so the pin read of the 50% chart.

can you suggest good traning institute in instrumentation ? (in automation, or designing)

5 Answers  

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in current transmitter why we use 4-20ma ???

2 Answers   IMCO, IOCL,

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HELLO FRENDS ,, I M IN THE MIDST OF TROUBLE .. JUST LITTLE HELP ME... SUPPOSE ,, I HAVE A CLOSE VESSELE TANK ( HEXANE MEDIA ) ,, I M USING ROSEMOUNT 2051 DPT FOR LEVEL APPLICATION .. ITS CALIBRATE RANGE IS.. . 0 TO 950 MMH20 ..I DID CALIBRATED DPT WITHOUT REMOVING IMPULSE LINE OF HIGH AND LOW TAPPING.. & WITHOUT DISTURB 3 WAY MANIFOLD..!!! BUT ,,, DURING CALIBRATION I SELECT RANGE BY HART LRV IS 900 MMH20 & URV IS 1300 MMH20 ,, BUT ,TANK LEVEL SOMETIMES 100 % AT 1100 MMH20 , SOMETIMES 1300 MMH20 ..IN THIS CONDITION .. WHOLE LOOP FAILED ,, MAIN THING IS THAT ,, HOW TO CUSTOME RANGE SELECT ?? AND IF I USED RANGE OVER THE ORIGINAL CALIBRATE RANGE ,,,THEN WHAT ERROR WILL BE COME ??? HOW TO ZERO CALIBRATION OF DPT... HOW TO ZERO TRIM BY MANIFOLD ?? AND FOR TANK LEVEL PURPOSE ... WHICH UNIT I CAN USE ??? IS THERE ANY CALCULATION OR CALIBRATION .. IF YEH .. THEN PLZ JUST GIVE ME CALIBRATION STEPS FOR DPT.. THANKS YOURSSSSSSS

1 Answers   Torrent Pharma,

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Why Bently Nevada use negative voltage for vibration probes?

4 Answers  

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what is three element loop

7 Answers  

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Can a pneumatic control valve work without positioner?

4 Answers   SMC,

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what is the usage of QDV & VOLUME BOOSTER

0 Answers   ADMA OPCO,

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what are the levels of automation?

1 Answers  

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Identify the electrical variable that is either directly or inferentially used by various instruments to determine the value of a measured variable.

4 Answers  

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why we are using negative range like -750 to 0 mmwc in closed tank?and what is the reason can you explain clear?

2 Answers   Aarvi Encon,

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whats the problem will arrise if we rotate the hosing screw of the differential pressure transmitter?

1 Answers  

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i want to Measure the Difference pressure of Packed distillation Column of height 3 mtr. h.p. side connected to bottom & L.P. side connected to the top , so tell me what will be THE URV & LRV of that D.P. transmitter?

5 Answers  

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