Consider a level troll. i am getting a correct value in 4mA and 20mA. the valu

Consider a level troll.
i am getting a correct value in 4mA and 20mA.
the value in the middle(30 to 60%)is disturbed and i am not
getting the appropriate value.
what is the solution to normalize the level and to get the
correct value..

Question Posted / senthil.doosan

2 Answers
6174 Views
KNPC, I also Faced
E-Mail Answers

Answers were Sorted based on User's Feedback

Consider a level troll. i am getting a correct value in 4mA and 20mA. the value in the middle(30 t..

Answer / joe mccabe

a) calc the hyteresis and reset the 4-20 to it, accepting
the deviation in the middle

b) test the amount of deviation @ 4ma,8ma,12ma, 16ma,&20ma
and see if slope is repeatable, write program correction
for slope

c) Your instrument has a hardware issue, do the right thing
and replace it.

Is This Answer Correct ?

6 Yes

1 No

Consider a level troll. i am getting a correct value in 4mA and 20mA. the value in the middle(30 t..

Answer / amit

Just Simply Calibrate the transmitter With Different ranges
check for

0% should get 4mA
25% should get 8mA
50% should get 12mA
75% should get 16mA
100% should get 20mA
take reading from Increasing and decreasing Reading. And
According to which plz Set ZERO or SPAN.

Is This Answer Correct ?

1 Yes

8 No

Post New Answer

More Instrumentation Interview Questions

can anyone tell me about the basic concepts to consider before to start a PLC panel wiring

0 Answers ABB,

in natural gas indirect water bath heater,how to prevent the problem of backfire from firetube during ignition...becoz of this backfire performance of wbh is going low.

0 Answers

who discoverd ohms law?

3 Answers HPCL,

the output of the common trasmitter protocol in qatar gas are the following

0 Answers

hw to calibration a control valve?

3 Answers

Explain operation of Haskel pump.

0 Answers CCIE,

WHAT IS ANNUBAR?

7 Answers

how to caluculate flow by using transmitter?tell me plz I am eagerly waiting for your reply..

2 Answers Agi Glaspac, Reliance Power,

The wire is disconnected from the fuel gauge sending unit (bimetallic gauge). A voltmeter connected to the wire reads a pulsating 5v. What does this indicate?

3 Answers

What is fault tolerent system

2 Answers GNFC,

what do u mean by 2/3 soleniod valves?

8 Answers Nile Sugar,

EXPLAIN SOME IMP QUESTIONS AND ANSWERS ON TOPIC ELECTRONICS,INSTRUMENTATION.........

1 Answers ONGC,

For more Instrumentation Interview Questions Click Here