Textile Machinery Noise Test Specification Series National Standards Promulgated

Part 2~7 (GB/T7111.2~7 - 2002) of the national standard for textile machinery noise test specification is equivalent to the plation of ISO9902 - 2~ - 7:2001, which is slightly different in editing. GB/T7111.1 - 2002 and ISO9902 1:2001 are mainly manifested in:

It has not been plated into China's standard (Note: the normalized unit of basic acoustics standard is CSBTS/TC17, the corresponding international standardization organization is ISO/TC43). In order to facilitate the use of standard, we add the contents of these basic acoustic standards to the new standard, so as to avoid checking the international standard original text, the working position of different measuring methods and the different accuracy levels of the emitted sound pressure level when using the new standard. A list of the emitted sound pressure levels of the "appendix A" working position and other specified locations is selectively formulated according to ISO11201:1995, ISO11202:1995 and ISO11204:1995; and 9.2, "the accuracy and the verification of the noise emission values of the same batch of machine measurements" and "Twelfth chapters" are formulated according to ISO4871:1996. I. ISO 90, 2 - 1: 2000, some basic standards of noise are quoted. We have some basic noise standards when formulating national standards.

At present, the above international standards have been adopted in different degrees as national standards, which can be seen from the second chapter "citation standard". But considering that these contents are more concise than the standard text, we still retain these contents in the new standard, but we need to learn the full text of the standard in order to fully understand and master the measurement method.

2. The introduction of ISO3740:2000 and ISO3747:2000 in the chapter "normative reference document" is the latest edition of the revised version of the "normative reference document". However, our national standard adopts the old version of the international standard and has not been revised so far. In the case of g / T / T, we use the national standard of the old version of the international standard, but it is noted that a new version has been published.

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