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..
Answers were Sorted based on User's Feedback
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 |
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 |
How to calibrate smoke Dectector
Draw a great bridge circuit.
How to ensure vibration sensor functioning accordingly.With out using an other sensor.
HOW TO CHOOSE FREAQUENCY IN FMCW TYPE RADAR INSTRUMENTS. DESIGN BASIS OR DESIGN CALCULATONS ?
What is the difference between uv and ir scanners? and what is the workig principle of both
units for vibration in power plant
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?
How to connect field devices to PLC and DCS using a FIELD BUS, DP,MOD BUS(please tell me any extra interfce or adopters need in this case if we use remote i/o s)
What is PLC(programmable logic control)?
Explain any simple temperature control system.
suppose there is gas flow meter I want to know weather meter calibration is done at high pressure or low pressure? pls justify.
WHICH IS BEST INSTRUMENTATION OR ELECTRICAL ENGG?