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GB/T 25753.4-2015 PDF English

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GB/T 25753.4-2015: Vacuum technology -- Roots vacuum pump -- Measurement of performance characteristics -- Part 4: Measurement of noise
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GB/T 25753.4-2015English169 Add to Cart 3 days [Need to translate] Vacuum technology -- Roots vacuum pump -- Measurement of performance characteristics -- Part 4: Measurement of noise

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Basic data

Standard ID GB/T 25753.4-2015 (GB/T25753.4-2015)
Description (Translated English) Vacuum technology -- Roots vacuum pump -- Measurement of performance characteristics -- Part 4: Measurement of noise
Sector / Industry National Standard (Recommended)
Classification of Chinese Standard J78
Classification of International Standard 23.160
Word Count Estimation 8,888
Date of Issue 2015-12-10
Date of Implementation 2017-01-01
Quoted Standard GB 3102.7; GB/T 3241; GB/T 3785.1-2010; GB/T 3947; GB/T 14574; GB/T 15173-2010; GB/T 21271-2007
Regulation (derived from) National Standard Announcement 2015 No.38
Issuing agency(ies) General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China, Standardization Administration of the People's Republic of China
Summary This standard specifies the noise measurement Roots vacuum pumps acoustic environment, measuring instruments, installation, load and operating conditions of the pump, and measured sound power level. This standard applies to roots pump (hereinafter referred to as the Roots pump).

GB/T 25753.4-2015: Vacuum technology -- Roots vacuum pump -- Measurement of performance characteristics -- Part 4: Measurement of noise




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Vacuum technology - Roots vacuum pump - Measurement of performance characteristics - Part 4. Measurement of noise ICS 23.160 J78 National Standards of People's Republic of China Roots vacuum pumps - Measurement of performance art Part 4. Noise measurement characteristics-Part 4. Measurementofnoise Issued on. 2015-12-10 2017-01-01 implementation Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China Standardization Administration of China released

Foreword

GB/T 25753 "Roots vacuum pumps - Measurement of performance art" is divided into four parts. --- Part 1. The maximum allowable differential pressure measurement; --- Part 2. Zero flow compression ratio measurement; --- Part 3. Measurement of differential pressure relief valve; --- Part 4. Noise measurement. This is Part 4 GB/T 25753 of. This section drafted in accordance with GB/T 1.1-2009 given rules. This part is proposed by China Machinery Industry Federation. This part of the National Vacuum Technology Standardization Technical Committee (SAC/TC18) centralized. This section is responsible for drafting. Zhejiang Vacuum Equipment Group Co., Ltd. Participated in the drafting of this section. Ludwig magnetic fluid Hunan Co., Ltd., Zhongshan Kaixuan Vacuum Technology Engineering Co., Ltd., Zhejiang God for Vacuum Equipment Manufacturing Co., Ltd., Hangzhou Xihu Vacuum Equipment Factory, Shandong Precision Pump Co., Ltd., Ningbo ULVAC Vacuum Technology Co., Taizhou Global Vacuum Equipment Manufacturing Co., Ltd., Ma Leybold Vacuum Equipment Group Co., Ltd., Shandong par Vacuum Equipment Co., Ltd., Shenyang Shenyang Vacuum Technology Research Institute. The main drafters of this section. Wang Xi, Luogen Song, Xu Tao, the words following spring, Wang hair, Li Longjun, Wang Deshun, Ren Weimin, Li Feng, He Xiaobo, Zhao meter spring, Zhao Weisheng, Wang Yu-xiang, Zhang Dongqing, Li Yuying. Roots vacuum pumps - Measurement of performance art Part 4. Noise measurement

1 Scope

This section GB/T 25753 specifies the measure Roots vacuum pump noise acoustic environment, measuring instruments, pump installation, load and run Conditions, and the sound power level measurements. This section applies to Roots vacuum pump (hereinafter referred to as the Roots pump).

2 Normative references

The following documents for the application of this document is essential. For dated references, only the dated version suitable for use herein Member. For undated references, the latest edition (including any amendments) applies to this document. GB 3102.7 Quantities and units of acoustics GB/T 3241 electro-acoustics octave and fractional octave filters GB/T 3785.1-2010 Electric Acoustic Sound Level Meters - Part 1. Specification GB/T 3947 Acoustics Terminology Declaration and verification of GB/T 14574 Acoustics machinery and equipment noise emission values GB/T 15173-2010 electric acoustic sound calibrators GB/T 21271-2007 vacuum pump noise measurement technology

3 Terms and Definitions

GB 3102.7 and GB/T 3947 defined by the following terms and definitions apply to this document. 3.1 Sound Power soundpower Noise source in unit time emitted acoustic energy. Note. in watts (W). 3.2 Sound power level soundpowerlevel LW Than the sound power emitted by the test and the reference sound power of noise sources logarithm to the base 10 multiplied by 10. Note 1. in decibels (dB). Note 2. You must specify the frequency weighting used. Such as A-weighted sound power level is LWA. Note 3. The reference sound power 1pW (1pW = 10-12 W). 3.3 Background noise correction backgroundnoisecorrection K1 By the effect of background noise on the surface sound pressure level and the introduction of a correction term. ...

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