What do the alphabetical codes for the variables to be measured and the functions of the instruments generally represent on a flowchart?
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As the title suggests: What do the alphabetical codes representing the variables to be measured and the functions of instruments in flowcharts mean? :handshake
A Analysis Alarm B Flame C Conductivity Control D Density Difference E Voltage Detection Element F Flow Ratio G Size Glass H Manual Upper Limit I Current Indicator J Power Scan K Time Operator L Level Lower Limit M Humidity O Throttle Hole P Pressure Test Point Q Quantity Cumulative R Radioactivity Recording S Speed Safety Interlock T Temperature Transmitter U Multi-variable Multifunctional V Viscosity Valve W Weight Sleeve Y Actuator z Position Actuator X Used sometimes to represent vibration measurement
You can refer to the following posts: Alphabetical codes for instrument function indicators http://bbs.hcbbs.com/viewthread.php?tid=255668&highlight=%D2%C7%B1%ED%2B%D7%D6%C4%B8 Alphabetical codes for measured variables and instrument functions http://bbs.hcbbs.com/viewthread.php?tid=103523&highlight=%D2%C7%B1%ED%2B%D7%D6%C4%B8 Alphabetical codes for instruments http://bbs.hcbbs.com/viewthread.php?tid=188279&highlight=%D2%C7%B1%ED%2B%D7%D6%C4%B8
Functional indicators and graphic symbols for process measurement and control instruments HG/T 20505-2000. Graphic symbols and textual codes for process monitoring and control flowcharts GB 2625-81.