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

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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 ?

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8 No

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