What is loop checking ?
- 10 Answers
- 109686 Views
- Kharafi National, Petrofac, Samsung, I also Faced
- E-Mail Answers
Answer Posted / dnz_72
In simple terms it is a test starting at the process variable through the controller and back to the control device to see if everything is working properly.
As as example: You have a tank with a water level controlled by an inlet valve that opens or closes as needed to maintain the level.
The signal from a level device (let's say a level transmitter) goes to a controller. A signal then goes from the controller to the level control valve opening or closing it. That is the control loop.
The loop test determines if the proper signal is going from the level transmitter to the controller and then is the correct signal going from the controller to the control valve and is it opening or closing as it should.
| Is This Answer Correct ? | 16 Yes | 3 No |
Post New Answer View All Answers
PLEASE PROVIDE SAMPLES OF CHEVRON SKILL TESTS
PT RTD Range: -200 to 500 degree celsius If I configured in DCS Lower range and Upper range . In face plate it shows red colour due to overa range how was the characteristics look If the temperature is more than operating range. how was the characteristics look . whether its in Resistance vs Temperature curve is Linear or Non linear
What is solenoid valve? Where it is used?
what are procedure of sox-nox calibration
How to calibration coriolis flow meter?
What inherent design and operating principles are included in a modern control system to use predictive maintenance practices to increase overall system reliability?
can you provide me full detail about instrumentation in ONGC??
Dear Friends, we are planning to design Power distribution and Fiber optic in the same cabinet.Like Front side Fiber optic and Rear side Power distribution.Is it any possibility of problem occurs like interference etc? Your answer is highly appreciate.
Why rdt and thermocouple both give different output .and one things more, how to generate ohm or mili volt plz mail me merajalam143545@yahoo.com
We Have Two Field bus Pressure Transmitters of Different Sensor Range (I.E One is of Lower range and Another is of Higher Range).Is same Process Line. My Question is Can i provide Saturation Limit to my field Bus Transmitter as We can provide Saturation current limit to HART Instruments. As During Low Pressure Both Working OK ,But During High Pressure, transmitter with Lower sensor range Goes to Fault mode as Beyond its Sensor Limit it can Measure, So may I provide Saturation point Some where to Suppress This Fault during High Pressure.
Can any one tell me what type of question asked for instrumentation and control interview panel??? pls mail ramashankar.goel@gmail.com
field bus transmitter calibration procedure tell me
Question on maha cement
why we should maintain neutral earth voltage below 1V while calibration? why cant it be 1.2V or 2V
Why grounding is necessary? Give example with diagram.
