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JJF 1955-2021 English PDF

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US$529.00 · In stock
Delivery: <= 4 days. True-PDF full-copy in English will be manually translated and delivered via email.
JJF 1955-2021: Calibration Specification for Infrasonic Sensors (Coupler Comparison Method)
Status: Valid

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
JJF 1955-2021	529	Add to Cart	4 days	Calibration Specification for Infrasonic Sensors (Coupler Comparison Method)	Valid

Similar standards

GB/T 3222.1 JJF 1234 JJF 1396 JJF 1956 JJF 1957 JJF 1954

Basic data

Standard ID: JJF 1955-2021 (JJF1955-2021)
Description (Translated English): Calibration Specification for Infrasonic Sensors (Coupler Comparison Method)
Sector / Industry: Metrology & Measurement Industry Standard
Classification of Chinese Standard: A57
Word Count Estimation: 23,260
Issuing agency(ies): State Administration for Market Regulation

JJF 1955-2021: Calibration Specification for Infrasonic Sensors (Coupler Comparison Method)

---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.
Calibration Specification for Infrasonic Sensors (Coupler Comparison Method) National Metrology Technical Specification of the People's Republic of China Infrasound Sensor Calibration Specification (Coupled cavity comparison method) Published on 2021-12-28 2022-06-28 Implementation Released by the State Administration for Market Regulation Infrasound Sensor Calibration Specification (Coupled cavity comparison method) Focal Point. National Acoustic Metrology Technical Committee Drafting unit. China Institute of Metrology Institute of Chemical Defense, Academy of Military Sciences Zhejiang University Aviation Industry Beijing Great Wall Metrology and Testing Technology Research Institute China Institute of Testing Technology This specification is entrusted to the National Acoustic Metrology Technical Committee to be responsible for the interpretation Drafters of this specification. Feng Xiujuan (China Institute of Metrology) He Longbiao (China Institute of Metrology) Liu Wei (Institute of Chemical Defense, Academy of Military Sciences) He Wen (Zhejiang University) Zhang Bingyi (Beijing Great Wall Metrology and Testing Technology Research Institute of Aviation Industry) Niu Feng (China Institute of Metrology) E Zhiqun (China Institute of Testing Technology)

Introduction (Ⅱ) 1 Scope(1) 2 References (1) 3 Terms and units of measurement(1) 4 Overview(1) 5 Metrology Characteristics(2) 6 Calibration Conditions(2) 6.1 Environmental conditions (2) 6.2 Measurement standards and other equipment(2) 7 Calibration items and calibration methods (2) 7.1 Calibration items (2) 7.2 Calibration method(3) 8 Expression of calibration results (5) 8.1 Calibration records (5) 8.2 Calibration data processing(5) 8.3 Calibration certificate(5) 8.4 Uncertainty assessment of calibration results (5) 9 Recalibration interval(5) Appendix A Reference to Environmental Parameter Correction for Sensor Sound Pressure Sensitivity Level (6) Appendix B Content and Format of Calibration Record(7) Appendix C Contents and inner page format of calibration certificate (9) Appendix D Measurement Uncertainty Evaluation Example(11)

Introduction

This specification is compiled according to the rules given in JJF 1071-2010 "Rules for Compilation of National Metrology Calibration Specifications". This specification refers to GB/T 20441.4-2006 "Measurement Microphone Part 4.Specification for Working Standard Microphone Fan", IEC 61094-5.2016 "Electroacoustic Measurement Microphone Part 5.Sound Pressure Calibration of Working Standard Microphone "Comparative Method" and JJG1019-2007 "Working Standard Microphone (Coupled Cavity Comparison Method)". The measurement uncertainty is evaluated and evaluated according to the requirements of JJF 1059.1-2012 "Measurement Uncertainty Evaluation and Representation". express. This specification is published for the first time. Infrasound Sensor Calibration Specification (Coupled cavity comparison method)

1 Scope

This specification applies to the calibration of the coupled cavity comparison method for infrasound sensors in the frequency range of 0.01Hz to 20Hz.

2 Reference documents

This specification references the following documents. JJG1019-2007 Working standard microphone (coupled cavity comparison method) JJF 1001-2011 General Metrology Terms and Definitions JJF 1034-2020 Acoustic Metrology Terms and Definitions JJF 1059.1-2012 Evaluation and representation of measurement uncertainty GB/T 3102.7-1993 Quantities and Units of Acoustics GB/T 3947-1996 Acoustic terminology GB/T 20441.4-2006 Measurement microphones - Part 4.Specification for working standard microphones IEC 61094-5.2016 Electroacoustic measurement microphones - Part 5.Working standard microphones for sound pressure calibration For dated references, only the dated version applies to this specification; for undated references The latest version (including all amendments) applies to this specification.

3 Terminology and units of measurement

This specification adopts the quantities and units specified in GB/T 3102.7. The terms and definitions defined in JJF 1001-2011, JJF 1034-2020 and GB/T 3947-1996 and the following are applicable used in this specification. 3.1 Reference sensor referencesensor Infrasound sensors with pre-measured sound pressure sensitivity. The ratio of the root sum of the rms values of all harmonic components to the rms value of the fundamental.

4 Overview

An infrasound sensor is a sensor that can effectively detect infrasound waves. In order to meet various testing requirements, there are Capacitive, bellows box, fiber optic sensors with different working principles. The operating frequency range is generally in the 0.01Hz~20Hz, the lower limit operating frequency of the sensor for special application requirements (such as pre-earthquake prediction) can be as low as 0.001Hz. ......

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Tips & Frequently Asked Questions:

Question 1: How long will the true-PDF of JJF 1955-2021_English be delivered?

Answer: Upon your order, we will start to translate JJF 1955-2021_English as soon as possible, and keep you informed of the progress. The lead time is typically 2 ~ 4 working days. The lengthier the document the longer the lead time.

Question 2: Can I share the purchased PDF of JJF 1955-2021_English with my colleagues?

Answer: Yes. The purchased PDF of JJF 1955-2021_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.