JJF 1681-2017 English PDF

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
JJF 1681-2017	RFQ	ASK	3 days	Program of Pattern Evaluation of Sound Level Meters	Valid

Similar standards

GB/T 3222.2   GB/T 3222.1   JJG 188   JJG 1190   JJF 2012   JJF 1934   

Basic data

Standard ID: JJF 1681-2017 (JJF1681-2017)
Description (Translated English): Program of Pattern Evaluation of Sound Level Meters
Sector / Industry: Metrology & Measurement Industry Standard
Classification of Chinese Standard: A59
Classification of International Standard: 17.140
Word Count Estimation: 106,155
Date of Issue: 2017-11-20
Date of Implementation: 2018-05-20
Older Standard (superseded by this standard): JJG 188-2002
Quoted Standard: JJG 176-2005; JJG 482-2005; JJG 790-2005; JJG 1019-2007; JJF 1001-2011; JJF 1015-2014; JJF 1034-2005; JJF 1059.1-2012; JJF 1147-2006; JJF 1293-2011; GB/T 3102.7-1993; GB/T 3947-1996; GB/T 6113.102-2008; GB/T 6113.203-2016; GB/T 17312; GB/T 17626.20-2014
Regulation (derived from): AQSIQ Notice 2017 No. 103
Issuing agency(ies): State Administration for Market Regulation

JJF 1681-2017: Program of Pattern Evaluation of Sound Level Meters

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(Sound level meter type evaluation outline) National Metrology Technical Specification of the People's Republic Sound level meter type evaluation outline Released on.2017-11-20 2018-05-20 implementation The General Administration of Quality Supervision, Inspection and Quarantine issued Sound level meter type evaluation outline Replace JJG188-2002 Type evaluation section Focal Point. National Acoustic Metrology Technical Committee Drafted by. China Institute of Metrology Jilin Institute of Metrology China Shipbuilding Industry Corporation Seventh One Institute Hangzhou Aihua Instrument Co., Ltd. Hubei Institute of Metrology and Testing Technology This specification entrusts the National Acoustic Metrology Technical Committee to explain Drafters of this specification. Niu Feng (China Institute of Metrology) Xu Huan (China Institute of Metrology) Bai Hao (China Institute of Metrology) Fang Facheng (Jilin Institute of Metrology) Zhu Chuanhuan (The 7th Institute of China Shipbuilding Industry Corporation) Zhang Shaodong (Hangzhou Aihua Instrument Co., Ltd.) Yao Qiuping (Hubei Institute of Metrology and Testing Technology)

table of Contents

Introduction (IV) 1 Scope (1) 2 References (1) 3 Terms and definitions (2) 3.1 Sound pressure (2) 3.2 Sound pressure level (3) 3.3 Frequency weighting (3) 3.4 Time weighting (3) 3.5 sound level (3) 3.6 Time weighting sound level (3) 3.7 Maximum time weighted sound level (4) 3.8 Peak sound pressure (4) 3.9 Peak sound level (4) 3.10 Time average sound level (4) 3.11 Acoustic exposure (5) 3.12 sound exposure level (5) 3.13 Microphone (6) 3.14 Microphone reference point (6) 3.15 Reference direction (6) 3.16 acoustic incident angle (6) 3.17 Relative pointing response (6) 3.18 Directivity factor (6) 3.19 Directivity Index (6) 3.20 Relative frequency weighted free field response (6) 3.21 Relative Frequency Weighted Random Incident Response (6) 3.22 level range (7) 3.23 Reference Sound Pressure Level (7) 3.24 Reference Level Range (7) 3.25 Calibration Check Frequency (7) 3.26 range deviation (7) 3.27 Linear working range (7) 3.28 Total range (7) 3.29 猝声 (7) 3.30 vocal response (8) 3.31 Reference orientation (8) 3.32 inclusion probability (8) 3.33 Acceptance limit (8) 4 Overview (8) 4.1 Principles and Applications (8) 4.2 Classification and classification (8) 5 Legal Management Requirements (9) 5.1 Unit of measurement (9) 5.2 External structure (9) 5.3 Signs (9) 5.4 Technical Information (9) 6 Measurement requirements (13) 6.1 Instructions on the calibration check frequency (13) 6.2 pointing to response (14) 6.3 Frequency weighting (14) 6.4 Correction of the indication level (17) 6.5 range (19) 6.6 Underage indication (19) 6.7 Self-generated noise (19) 6.8 Time Weighting F and S (19) 6.9 response (20) 6.10 Repeated click response (21) 6.11 Overload indication (22) 6.12 C-weighted peak sound level (22) 6.13 Reset (23) 6.14 Analog Output or Digital Output (23) 6.15 Timing function (23) 6.16 Crosstalk (23) 6.17 Power Supply (24) 6.18 Radio Frequency Emissions and Harassment of Public Power (24) 6.19 Static pressure (24) 6.20 Air temperature (24) 6.21 Relative Humidity (25) 6.22 Electrostatic Discharge (25) 6.23 AC power frequency field and RF field (25) 7 General technical requirements (26) 7.1 Appearance and Structure (26) 7.2 Functional requirements (26) 8 type evaluation item list (27) 9 Provide the number of prototypes and how to use the prototype (28) 9.1 Number of prototypes provided (28) 9.2 How to use the prototype (29) 10 Test methods and conditions of test items and data processing and qualification criteria (29) 10.1 General requirements for environmental, electrostatic and radio frequency tests (29) 10.2 Effects of Static Pressure (30) 10.3 Simplified test of the combined effects of air temperature and relative humidity (31) 10.4 Effect of air temperature (33) 10.5 Effects of relative humidity (34) 10.6 Effects of Electrostatic Discharge (35) 10.7 Effects of AC Power Frequency Field and RF Field (35) 10.8 RF emissions and disturbance to public power (38) 10.9 General requirements for electroacoustic performance tests (38) 10.10 Instructions on the calibration check frequency (39) 10.11 Directivity (40) 10.12 Sound signal test for frequency weighting (42) 10.13 Frequency-weighted electrical signal test (45) 10.14 Correction of the effect of reflection from the sound level meter housing and diffraction near the microphone (47) 10.15 Correction for free field or random incident sound level (48) 10.16 range (48) 10.17 Underage indication (50) 10.18 Self-generated noise level (50) 10.19 Time-weighting F and S decay time constants (51) 10.20 Sounding response of a sound level meter measuring time-weighted sound level (51) 10.21 Acoustic response of a sound level meter measuring sound exposure level or time average sound level (53) 10.22 Response of repeated burst sequences of sound level meters measuring time average sound level (54) 10.23 Overload indication (54) 10.24 C weighted peak sound level (55) 10.25 Reset (56) 10.26 Electrical Output (56) 10.27 Timing Function (56) 10.28 Crosstalk in a multichannel sound level meter system (57) 10.29 Power (57) 11 Measuring instruments and equipment used in the test items (57) 12 type evaluation records (59) Appendix A Sound Level Meter Type Evaluation Record Format (60) Appendix B Maximum Allowable Measurement Uncertainty (96)

Introduction

JJF 1016-2014 "Guidelines for the Preparation of Types of Measuring Instruments", JJF 1001-2011 "General Metrology Language and Definitions and JJF 1059.1-2012 "Measurement and Expression of Measurement Uncertainty" together constitute the basis for the formulation of this syllabus Basic series specifications. This syllabus is in accordance with the international standard IEC 61672-1.2013 "Electroacoustic sound level meter Part 1. Specification" (Electroacoustics-SoundlevelmetersPart 1.Specifications), IEC 61672-2.2013 Sound Level Meter Part 2. Type Evaluation Test (Electroacoustics-SoundlevelmetersPart 2. The requirements of Patternevaluationtests) can be objective, comprehensive and effective for the performance of the sound level meter. evaluation of. The structure of this syllabus is organized in accordance with JJF 1016-2014 Guidelines for the Preparation of Types of Measuring Instruments. Each chapter is in accordance with JJF 1015-2014 "General Specification for Type Evaluation of Measuring Instruments" and JJF 1002-2010 Preparation of the Rules for the Preparation of Volume Verification Procedures. The requirements and descriptions of the uncertainty follow JJF 1059.1-2012 Principles and regulations of "Measurement and Expression of Measurement Uncertainty". This outline replaces the type evaluation content of JJG188-2002 "Sound Level Meter Verification Regulations", and JJG188-2002 The main technical changes compared to the related content are as follows. --- Performance should meet the following conditions. a) the measurement deviation from the design target does not exceed the applicable acceptance limit; b) the measurement uncertainty does not exceed the corresponding maximum allowable uncertainty, determined by the inclusion probability of 95%; --- The "tolerance" of the measurement requirements was changed to the "receipt limit"; --- Revised the requirements for Class 1 sound level meter C frequency weighting; --- Increase the acceptance limit of the difference between the hood correction value measured in Table 1 and the corresponding correction value given in the instruction manual; --- Removed the requirement for an optional FLAT (flat) frequency response; --- Modified the requirements for time-weighted F and S decay rates; --- Revised the requirements for immunity to RF field effects; ---Modified the requirements of the acoustic calibrator used in environmental tests; --- Increase the use of electrical signals in simplified tests that combine the effects of air temperature and relative humidity; --- Increased requirements for monitoring sound field stability in electroacoustic performance tests; --- Increased the requirement to evaluate the measurement uncertainty in the free-field test device; --- Added the requirement to verify the calibration check frequency adjustment data; --- Added the requirement to verify the reference direction of the sound level meter of the sound level meter that is not along the axis of symmetry of the microphone; --- Modified the content of the test windshield correction value; --- Added the ability to replace laboratory standard microphones with working standard microphones in comparative coupler tests Provision --- Increased the content of the comparison coupler in the verification of the free field sound level correction value; --- Increased the content of the random incident sound level correction value; --- Modified the requirements for the self-generated noise level; --- Increased the requirement to report the self-generated noise level; --- Added references. The previous versions of this specification were released as follows. ---JJG188-2002 The type evaluation part of the Sound Level Meter. Sound level meter type evaluation outline

1 Scope

This type of evaluation outline is applicable to the type evaluation of a sound level meter with a classification code of 28060500.

2 reference files

This outline refers to the following documents. JJG176-2005 Acoustic Calibrator JJG482-2005 Laboratory Standard Microphone (Free Field Reciprocity Method) JJG790-2005 Laboratory Standard Microphone (Coupling Cavity Reciprocity Method) JJG1019-2007 working standard microphone (combined cavity comparison method) JJF 1001-2011 General Measurement Terms and Definitions JJF 1015-2014 General specification for type evaluation of measuring instruments JJF 1034-2005 Acoustic measurement terminology and definition JJF 1059.1-2012 Measurement uncertainty evaluation and representation JJF 1147-2006 Calibration specifications for acoustic characteristics of anechoic chambers and semi-anechoic chambers JJF 1293-2011 Electrostatic Excitation Calibration Specification GB/T 3102.7-1993 The amount and unit of acoustics GB/T 3947-1996 acoustic terminology GB/T 6113.102-2008 Specification for radio disturbance and immunity measuring equipment and measuring methods - Part 1-2 Points. Radio disturbance and immunity measurement equipment auxiliary equipment conducted disturbance (CISPR16-1-2.2006, IDT) GB/T 6113.203-2016 Radio disturbance and immunity measurement equipment and methods of measurement - Part 2-3 Points. Radio disturbance and immunity measurement methods Radiated disturbance measurement (CISPR16-2-3.2010, IDT); Random incident and diffuse field calibration of GB/T 17312 sound level meter GB/T 17626.20-2014 Electromagnetic compatibility test and measurement technology in transverse electromagnetic wave (TEM) waveguide Emission and immunity test ISO 26101.2012 Acoustic identification test methods for free-field environments (Acoustics-Testmethods Forthequalificationoffree-fieldenvironments) IEC 61000-4-2.2008 Electromagnetic compatibility - Part 4-2. Test and measurement techniques Electrostatic discharge immunity Test (Electromagneticcompatibility(EMC)-Part 4-2. Testingandmeasurementtech- niques-Electrostaticdischargeimmunitytest) IEC 61000-4-3.2010 Electromagnetic compatibility - Part 4-3. Test and measurement techniques Immunity test (Electromagnetic compatibility (EMC)-Part 4-3. Testing and measurementtechniques-Radiated,radio-frequency,electromagneticfieldimmunity Test) IEC 61000-4-6.2008 Electromagnetic compatibility - Part 4-6. Test and measurement techniques ......

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