PID diagram analysis
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1. May I ask the experts, what do GT, GSH, and GSL stand for respectively? Thank you for the reply.
Also, for interlock C 14 in the diagram, where can I find its description? Thank you
GT refers to the valve positioner, while GSH and GSL are the open and closed limit switches respectively
Thank you for your reply. Aren’t the responses usually from ZSO and ZSC? There’s also the whole H, L. . . . . .
A gas detector transmitter is generally denoted by GT. GSH and GSL represent high and low alarms. Take a look at the legend of the flowchart to see if there are any annotations or other detailed data tables. It might detect leaks.
GT Our factory indicates gas detectors
G gas detection, S series, H high, L low, T transmitter
This should be a safety instrument interlock; check I/10
C14 is triggered by ESD, and ESD refers to an emergency shutdown; usually, this occurs when the emergency shutdown button is pressed