GB/T 4728 "Graphic symbols for diagrams" can be divided into 13 parts::
——Part 1: General Informationn
——Part 2: symbol elements, definitive signs and other conventional signs;
——Part 3: conductors and connecting pieces;
——Part 4: basic passive components
——Part 5: Semiconductors and Electron Tubes
——Part 6: Production and conversion of the electrical energy;
——Part 7: Switchgear, Controlgear and Protective Devices;
——Part 8: Measuring Instruments, Lamps and Signaling Devices;
——Part 9: Telecommunications: Switching and Peripheral Equipment;
——Part 10: Telecommunications: Transmission;
——Part 11: Architectural and Topographical Installation Plans and Diagrams;
——Part 12: Binary Logic Elements;
——Part 13: Analogue Elements
This section is part 8 of GB/T 4728 and identical to IEC 60617 database "Graphical symbols for diagrams" data base standard (IEC 60617 _Snapshot_ 2007-08-03 English edition).
This standard replaces GB/T 4728.8-2000 " Graphical symbols for diagrams--Part 8: Measuring instruments, lamps and signaling devices". Compared with GB / T 4728.8, changes are listed as following:
——new signs are addedS01417;
——11 signs are abolished: S00953(08-06-02), S00955(08-06-04), S00957(08-06-06), S00958(08-07-01), S00962(08-09-02), S00963(08-09-03), S00964(08-09-04), S00969(08-10-05), S00970(08-10-05), S00971(08-10-O8), S00974(08-10-12);
——According to IEC 60617 data base standard, more informationn is listed for each sign compared with the old edition.
The "replaced symbol" of this standard is the symbol replaced by present symbol which is the standard symbol. "Replacing symbol" of this standard is the symbol replacing the present symbol, which is abolished.
