Changes in the new standards of universal testing machines

Universal testing machineChanges in new standards The General Administration of Quality Supervision, Inspection and Quarantine and the National Standards Administration approved the issuance of the new standards gb/t 16491-2008 "Electronic Universal Testing Machine", which replaces gb/t 16491-1996 "Electronic Universal Testing Machine", and the main changes are: 1) The scope has been expanded and "electronic tensile testing machine" and "electronic pressure testing machine" are also included in this standard (Chapter 1 of the 1996 edition; Chapter 1 of this edition);
2) A term was deleted (1996 edition of 3.1);
3) Modified some of the contents of "Table 1 symbols" (Table 1 of the 1996 edition; Table 1 of this edition);
4) Modified some contents of the main parameter series (Chapter 4 of the 1996 edition; Chapter 4 of this edition);
5) The two levels of level 2 and level 3 in the test machine classification were cancelled (5.2 in 1996; 5.2 in this version);
6) Modified the requirement for the coaxiality of the test machine with a capacity not exceeding 5kn (1996 edition of 5.3.2.1; 5.3.2.1 of this edition);
7) Added requirements for bending indenter and its two-support hardness (1996 edition 5.3.4.1; 5.3.4.1 of this edition);
9) The regulations on the relative error index of the 0.5-level test machine speed and speed detection time were modified (5.3.5.3, 6.3.7 of the 1996 edition; 5.3.5.2, 6.3.9 of this edition);
10) Delete contents about calibration value drift and recording devices (5.4.1.4, 5.4.3 of 1996; 5.4.1.4 of this version);
11) The relative error of zero point, discriminant threshold, zero point drift technical indicators and calculation methods of force measurement system were modified (5.4, 6.4 of 1996; 5.4, 6.4 of this version);
12) Added technical requirements and measurement methods for control systems (5.7 and 6.7 of this edition);
13) Added technical requirements and detection methods for computer data acquisition systems (5.8 and 6.8 of this edition);
14) Some technical indicators of extensometers have been modified and the requirements for extensometer resolution have been added (1996 edition 5.5; this edition 5.5);
15) The technical requirements for electrical equipment and assembly quality have been revised and regulations on mechanical safety have been added (5.9, 1996 edition; 5.9 and 5.13 of this edition);
16) The requirements for accuracy of coaxial degree automatic detectors were modified (6.2, 1996 edition; 6.2, this edition);
17) Modified some of the contents of the test machine's coaxiality detection (1996 edition 6.3.1; this edition 6.3.3);
18) Appendix a (Appendix a, 1996 edition) was cancelled.

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