Seeking help regarding several letter combinations in the instrument PID diagram
Thread Content
While looking at the PID diagram, there are a few elements whose meaning I’m not familiar with. I would appreciate it if those who are experts in instrumentation could explain them to me. Thank you so much! ! !
Learn about HG/T 20505-2014 \"Functional Indicators and Graphic Symbols for Process Measurement and Control Instruments\"
I read this book, but I can’t come up with anything using the letters KJC.
Looking forward to the expert’s explanation; let’s learn together*.
KJC seems to be a typo for KIC.
The number inside the diamond indicates a logical relationship with that device?
HZLCO should be the switch signal for the on/off position of the valve； Here, H represents the serial number of the follow-up valve, ZL denotes the valve position, CO stands for closed and open, while KJC is the timing controller, which functions as a delay switch