The meaning of letters in the instrument is such as pv. . . . . . .
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Friend Hai Chuan, I often come across terms like PV, MV, SP, and other abbreviations that indicate manual or automatic modes in books. Could some friend please explain to me these letter codes that are commonly used in instruments?
PV; measured value SP； Set value
PV: Instantaneous flow rate; SP: Cumulative flow rate; mV: Voltage unit, for reference only
Sorry, I was referring to the letters in the control system
Reply to 3# Wang Tianze: I’m sorry, I didn’t explain clearly just now. What I asked about were the meanings of the letters in control systems, including inputs, outputs, detections, etc., in manual and automatic modes
pv = process value, mv = millivolt or manual value, sp = set point
pv: measurement value; sv: set value; mv: valve position value; es: engineer station; os: operator station
PV: measured value; SV: set value; MV: valve position output value. For the meaning of these letters, you can refer to professional books on control engineering and similar subjects
6th floor is the correct answer; that’s exactly how it is~
Refer to the standard \"Regulations for Chemical Process Automation Design\" HG
pv = process value, which represents the value of the process; mv = manual value, which represents the valve position; sp = set point, which represents the desired value