How can I zero check of wet leg type DP Tx ?

Categories >> Engineering >> Instrumentation
Suggest New Category

Question Posted / manish patel

6 Answers
16137 Views
ONGC, I also Faced
E-Mail Answers

Answers were Sorted based on User's Feedback

How can I zero check of wet leg type DP Tx ?..

Answer / yasir nazir

if the transmitter is installed below the tank,then we have
to calculate the HP side level below the tank zero level,and
applying
that much pressure on HP side to check the zero level.

And if transmitter is installed at zero tank level,then
isolating the HP side and draining the HP side gives the
zero level at transmitter.

Is This Answer Correct ?

9 Yes

1 No

How can I zero check of wet leg type DP Tx ?..

Answer / manish dave

First isolate HP side of Tx. and open vent port of HP side.
LP Side fill service liquid up to LP tapping and set the
zero.

In this case your HP & LP both sensor working or not it was
clearly identified.
While applying span pressure on LP side in this case if HP
side sensor fails than transmitter will not work after zero
checking.

Is This Answer Correct ?

14 Yes

7 No

How can I zero check of wet leg type DP Tx ?..

Answer / gnanvendan

close HP line isolation valve and drain in transmitter,then
check the LP side pressure according to LRV whether its
same or not.

Is This Answer Correct ?

6 Yes

1 No

How can I zero check of wet leg type DP Tx ?..

Answer / praveen kumar

Close both the isolation valves of Transmitter, and open
the line vent in LP side

Is This Answer Correct ?

8 Yes

5 No

How can I zero check of wet leg type DP Tx ?..

Answer / manish dave

yes dear

First u knew range of transmitter then apply span at LP side

Is This Answer Correct ?

9 Yes

11 No

How can I zero check of wet leg type DP Tx ?..

Answer / id10t

Open bypass so HP=LP.

Is This Answer Correct ?

7 Yes

12 No

Post New Answer

More Instrumentation Interview Questions

Why went

9 Answers

how to use level tranasmitter in closed tank application.?

3 Answers Dalkia,

how can check the loopchecking for valves?

3 Answers

what is three element in thermal boiler

9 Answers

few questions on RS 232,1 question on relationship of impedance and turns ratio, many questions on flowmeters

0 Answers Monnet,

Is Hart communicator calibration device or communicating device for transmitter?

4 Answers Yokogawa,

Sir , i have completed my M.Sc In Instrumentation and presently working in Maintenance department 3 yrs Exp , is there is any possible for work in offshore ..

0 Answers

What is pre-commissioning and commissioning ?

1 Answers Armco,

what is diff between sensors and transducers.explain with ex?

15 Answers

In power plant to measure vibration of a turbine we install sensors. Before install this sensor we have to set gap voltage. What is meant by gap voltage and its use?

0 Answers

HOW FOREIGN CONTROL SYSTEM CAN BE CONNECTED WITH DCS?

0 Answers

how level can be measured in open tank with reference to pressure

1 Answers Atul, INOX,

For more Instrumentation Interview Questions Click Here