Suppose a level measurement system is “stuck” at one measurement value of approximately 40% even when the process liquid level rises and falls between 20% and 80% of range (as indicated by the sight-glass):
Note: Pneumatic level transmitters were obsolete and no more found in industries.
An instrument technician removes the cover from the pneumatic transmitter and momentarily presses the baffle against the nozzle. The level indicator in the control room does not respond at all but remains fixed at about 40%.
Identify the likelihood of each possible fault in this list shown in the below table – whether the fault is “probable” (worth considering as a cause of this system’s trouble) or is “unlikely” (either completely ruled out as a cause, or just not worth considering at this point in the diagnosis) – following the results of the technician’s test:
Identify the below list of faults probable or unlikely to occur.
Share your answers and explanation with us through the below comments section.
Read Next:
Credits: Tony R. Kuphaldt
The conveyor sorting machine is widely used in the packing industries using the PLC program…
Learn the example of flip-flop PLC program for lamps application using the ladder logic to…
In this article, you will learn the STAR DELTA programming using PLC controller to start…
Lube oil consoles of rotary equipment packages in industrial process plants are usually equipped with…
Rotating equipment packages such as pumps, compressors, turbines need the lube oil consoles for their…
This article explains how to blink lights in ladder logic with a detailed explanation video…