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GB/T 3785.3-2018 English PDF

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US$344.00 · In stock
Delivery: <= 3 days. True-PDF full-copy in English will be manually translated and delivered via email.
GB/T 3785.3-2018: Electroacoustics -- Sound level meters -- Part 3: Periodic tests
Status: Valid

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GB/T 3785.3-2018	344	Add to Cart	3 days	Electroacoustics -- Sound level meters -- Part 3: Periodic tests	Valid

Similar standards

GB/T 3222.1 GB/T 3222.2 GB/T 4854.7 GB/T 3785.2 GB/T 3785.1 GB/T 3768

Basic data

Standard ID: GB/T 3785.3-2018 (GB/T3785.3-2018)
Description (Translated English): Electroacoustics -- Sound level meters -- Part 3: Periodic tests
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: A59
Classification of International Standard: 17.140.50
Word Count Estimation: 18,112
Date of Issue: 2018-06-07
Date of Implementation: 2019-01-01
Issuing agency(ies): State Administration for Market Regulation, China National Standardization Administration

GB/T 3785.3-2018: Electroacoustics -- Sound level meters -- Part 3: Periodic tests

---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
Electroacoustics--Sound level meters--Part 3. Periodic tests ICS 17.140.50 A59 National Standards of People's Republic of China Electroacoustic sound level meter Part 3. Cycle Testing Part 3.Periodictests (IEC 61672-3.2013, IDT) Published on.2018-06-07 2019-01-01 Implementation National Market Supervision Administration China National Standardization Administration released Directory Preface III 1 Scope 1 2 Normative references 1 3 Submit trial 2 4 Compliance 2 5 Initial inspection 3 6 Power supply 3 7 Environmental conditions 3 8 Routine test requirements 3 9 Sound Calibrator 3 10 at the calibration check frequency 4 11 Voluntary noise 4 12 Frequency-weighted acoustic signal test 5 13 Frequency-weighted electrical signal test 6 Frequency weighting and time weighting at 14 1kHz 7 15 Long-term stability 7 16 reference level range linear 7 17 Level 8 including stage range control 18 猝 pronunciation response 8 19 C weighted peak sound level 8 20 Overload indication 9 21 Loudness stability 9 22 Document 9

Foreword

GB/T 3785 "Acoustic Sound Level Meter" is divided into 3 parts. --- Part 1. Specifications; --- Part 2. Type evaluation test; --- Part 3. Periodic tests. This part is part 3 of GB/T 3785. This section was drafted in accordance with the rules given in GB/T 1.1-2009. This section uses the translation method equivalent to the use of IEC 61672-3.2013 "Electrical Acoustic Sound Level Meter Part 3. Cycle Test". The Chinese documents that are consistent with the normatively quoted international documents in this section are as follows. ---GB/T 3785.1-2010 Electroacoustic sound level meter Part 1. Specification (IEC 61672-1.2002, IDT) ---GB/T 3785.2-2010 Electroacoustic sound level meter Part 2. Type evaluation test (IEC 61672-2.2003, IDT) ---GB/T 15173-2010 Electro acoustics calibrator (IEC 60942.2003, IDT) --- GB/T 17312-1998 Random incidence and diffuse field calibration of sound level meters (eqvIEC 61183.1994) Please note that some of the contents of this document may involve patents. The issuing agency of this document does not assume responsibility for identifying these patents. This section was proposed by the Ministry of Industry and Information Technology of the People's Republic of China. This part is under the jurisdiction of the National Electroacoustics Standardization Technical Committee (SAC/TC23). This section was drafted by. China Institute of Metrology, Hengyang Hengyi Electric Co., Ltd., Hangzhou Aihua Instrument Co., Ltd., China Electronics The Third Institute of Science and Technology Corporation, the State-owned Factory of Jiaxing Branch of the 388 Factory, Shenzhen Institute of Metrology and Quality Inspection. The main drafters of this section. Niu Feng, Liu Xiangheng, Zhang Shaodong, Zhang Wei, Shu Guohua, Zhang Guoqing, Zhang Xudong, Bai Xi, Xu Huan. Electroacoustic sound level meter Part 3. Cycle Testing

1 Scope

This part of GB/T 3785 specifies a time-weighted sound level meter designed to meet the requirements of Class 1 and Class 2 as required by IEC 61672-1. Integral average sound level meter and integral sound level meter cycle test procedure. Its purpose is to ensure that all laboratories use a consistent method for the cycle test. Note 1. Unless otherwise specified, the IEC 61672-1 and IEC 61672-2 and IEC 61672-3 mentioned in this section are the second edition. NOTE 2 The periodic test procedure for the design of sound level meters in accordance with the specifications of GB/T 3785.1-2010 is given by IEC 61672-3.2006. The purpose of the periodic test is to demonstrate to the user that for a defined set of critical tests and under the environmental conditions under which the test is conducted, the sound level meter The performance meets the applicable specifications of IEC 61672-1. The scope of the tests in this section is a deliberately limited minimum range necessary for periodic testing. This section applies to sound level meters that the manufacturer claims to comply with IEC 61672-1 version 2 specifications. The periodic test in this section also applies to it Models have been or have not been subjected to a type approval test by an independent testing agency in accordance with IEC 61672-2 2nd Edition test procedure. Due to the limited scope of the periodic test, if the evidence of the type evaluation cannot be publicly obtained, even if the results of the periodic test comply with IEC 61672-3 All applicable requirements of the version cannot also make general conclusions in accordance with the IEC 61672-1 specification.

2 Normative references

The following documents are indispensable for the application of this document. For dated references, only dated versions apply to this article Pieces. For undated references, the latest version (including all amendments) applies to this document. IEC 60942 Electroacoustics-Sound calibrators IEC 61094-4 Test Microphone Part 4. Working Standard Microphone Specification (Measurement Microphones-Part 4. Specificationsforworkingstandardmicrophones) IEC 61094-6 Test microphones - Part 6. Electrostatic exciter method for measuring frequency response (Measurementmicro- phones-Part 6.Electrostaticactuatorsfordeterminationoffrequencyresponse) Random Incident and Diffuse Field Calibration of IEC 61183 Electroacoustic Sound Level Meter (Electroacoustics-Random-incidenceand Diffuse-fieldcalibrationofsoundlevelmeters) IEC 61672-1 Electroacoustic Sound Level Meter Part 1. Specification (Electroacoustics-Soundlevelmeters-Part 1. Specifications) IEC 61672-2 Electro-Acoustic Sound Level Meter Part 2. Type Evaluation Test (Electroacoustics-Soundlevel meters-Part 2.Patternevaluationtests) IEC 62585 Electroacoustics for the determination of the free field response of sound level meters (Electroacoustics-Methodstodeter- Minecorrectionstoobtainthefree-fieldresponseofasoundlevelmeter) ISO /IEC Guide 98-3 Uncertainty in measurement Part 3. Guidance for the presentation of measurement uncertainty (GUM..1995) [Uncertaintyofmeasurement-Part 3. Guidetotheexpressionofuncertaintyinmeasurement(GUM. 1995)] ISO /IEC Guide99 International Metrology Glossary Fundamentals Common Concepts and Related Terms [Internationalvocabularyof metrology-Basicandgeneralconceptsandassociatedterms(VIM)] ......

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Tips & Frequently Asked Questions:

Question 1: How long will the true-PDF of GB/T 3785.3-2018_English be delivered?

Answer: Upon your order, we will start to translate GB/T 3785.3-2018_English as soon as possible, and keep you informed of the progress. The lead time is typically 1 ~ 3 working days. The lengthier the document the longer the lead time.

Question 2: Can I share the purchased PDF of GB/T 3785.3-2018_English with my colleagues?

Answer: Yes. The purchased PDF of GB/T 3785.3-2018_English will be deemed to be sold to your employer/organization who actually pays for it, including your colleagues and your employer's intranet.

Question 3: Does the price include tax/VAT?

Answer: Yes. Our tax invoice, downloaded/delivered in 9 seconds, includes all tax/VAT and complies with 100+ countries' tax regulations (tax exempted in 100+ countries) -- See Avoidance of Double Taxation Agreements (DTAs): List of DTAs signed between Singapore and 100+ countries

Question 4: Do you accept my currency other than USD?

Answer: Yes. If you need your currency to be printed on the invoice, please write an email to Sales@ChineseStandard.net. In 2 working-hours, we will create a special link for you to pay in any currencies. Otherwise, follow the normal steps: Add to Cart -- Checkout -- Select your currency to pay.