Tham khảo tài liệu 'instrumentation symbols and identification part 5', kỹ thuật - công nghệ, cơ khí - chế tạo máy phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | General instrument or function symbols PRIMARY LOCATION NORMALLY ACCESSIBLE TO OPERATOR FIELD MOUNTED AUXILIARY LOCATION NORMALLY ACCESSIBLE TO OPERATOR DISCRETE INSTRUMENTS SHARED DISPLAY SHARED CONTROL 7 COMPUTER FUNCTION PROGRAMMABLE LOGIC CONTROL Symbol size may vary according to the user s needs and the type of document. A suggested square and circle size for large diagrams is shown above. Consistency is recommended. Abbreviations of the user s choice such as IP1 Instrument Panel 1 IC2 Instrument Console 2 CC3 Computer Console 3 etc. may be used when It Is necessary to specify Instrument or function location. Normally inaccessible or behlnd-the-panel devices or functions may be depicted by using the same symbol but with dashed horizontal ANSI R 1992 .
