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1. Going forward, the letter “K” denotes an automatic-manual operator installed in a control circuit; for example, the automatic-manual operator in a flow control circuit is denoted as “FK”, and it is different from the HC-manual operator. How should this sentence be understood? 2. Another manual symbol is ‘HS’. What is the difference between the three symbols FK, HC, and HS? Thank you!
Functional signs and graphic symbols for process measurement and control instruments HGT 20505-2014
This post was last edited by khhby116 on 2016-3-6 at 22:37. I also have the standard version; there are a few things I don’t understand. FK, HC, and HS are all hand controllers – what is the difference between them? So…………………………, thank you!
HC and HS are abbreviations in English; HC stands for manual control, referring to a manual operator, while HS means manual switch. FK is likely a custom term, presumed to be an automatic/manual switching switch.