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JJF 1833-2020 English PDF

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US$469.00 · In stock
Delivery: <= 4 days. True-PDF full-copy in English will be manually translated and delivered via email.
JJF 1833-2020: Calibration Specification for Vacuum Helium Leaks
Status: Valid

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
JJF 1833-2020	469	Add to Cart	4 days	Calibration Specification for Vacuum Helium Leaks	Valid

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Basic data

Standard ID: JJF 1833-2020 (JJF1833-2020)
Description (Translated English): Calibration Specification for Vacuum Helium Leaks
Sector / Industry: Metrology & Measurement Industry Standard
Classification of Chinese Standard: A53
Classification of International Standard: 17.100
Word Count Estimation: 21,265
Date of Issue: 2020
Date of Implementation: 2020-04-17
Issuing agency(ies): State Administration for Market Regulation

JJF 1833-2020: Calibration Specification for Vacuum Helium Leaks

---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 Vacuum Helium Leakage) National Metrology Technical Specifications of the People's Republic of China Calibration specification for vacuum helium leak 2020-01-17 released 2020-04-17 implementation Issued by the State Administration for Market Regulation Calibration specification for vacuum helium leak Replace JJG793-1992 Focal point. National Pressure Measurement Technical Committee Main drafting unit. China Institute of Metrology Participated in the drafting. National Defense Science and Technology Industry Vacuum First-Class Measuring Station Zhejiang Institute of Metrology Shanghai Dongbei Vacuum Equipment Co., Ltd. This specification entrusts the National Pressure Measurement Technical Committee to be responsible for interpretation The main drafters of this specification. Yu Hongyan (Chinese Academy of Metrology) Wang Jinku (China Institute of Metrology) Participating drafters. Li Detian (Vacuum Level One Metering Station for National Defense Technology Industry) Feng Yan (Vacuum Level One Metering Station for National Defense Technology Industry) Chen Yuhang (Zhejiang Institute of Metrology) Wang Jinsuo (Shanghai Dongbei Vacuum Equipment Co., Ltd.)

Introduction (Ⅱ) 1 scope (1) 2 Reference documents (1) 3 Terms and measurement units (1) 3.1 Term (1) 3.2 Unit of measurement (2) 4 Overview (2) 5 Measurement characteristics (2) 6 Calibration conditions (2) 6.1 Environmental conditions (2) 6.2 Measurement standards and other equipment (3) 7 Calibration items and calibration methods (3) 7.1 Calibration items (3) 7.2 Calibration method (3) 8 Calibration result expression (8) 9 Re-calibration interval (8) Appendix A. Vacuum Leak Calibration Record Format (9) Appendix B Internal page format of the vacuum leak calibration certificate (recommended format) (10) Appendix C Calibration Uncertainty Evaluation Example (11) Appendix D Leak rate unit conversion (15)

Introduction

JJF 1071-2010 "Rules for the Compilation of National Metrology and Calibration Specifications", JJF 1001-2011 "General Metrology Terms and Definition", JJF 1059.1-2012 "Evaluation and Expression of Measurement Uncertainty" and GB/T 3163-2007 "Vacuum Technology Terminology together constitute the basic series of documents formulated by this specification. This specification refers to BSEN20486.2018 "Non-destructive testing leak detection gas reference leak calibration" (NonDestructiveTesting-LeakTesting-CalibrationofReferenceLeaksforGases), ASTME908.1998 (2012) "Standard Practice for Calibration Gas Reference Leaks" (Standard Practicefor CalibratingGaseousReferenceLeaks) was formulated, using the basic principles, and specific methods And technical indicators have been refined, supplemented and modified. Compared with JJG793-1992, except for editorial changes, the main technical changes of this specification are as follows. ---The scope of application is expanded from standard leaks to all vacuum helium leaks, and the measurement range is extended downward by two numbers Magnitude ---The standard device adds a flowmeter method calibration device and a relative comparison method calibration device; ---The calibration method adds the flowmeter method and the relative comparison method; --- Increase the uncertainty evaluation method and the conversion method of mass flow and molar flow. The release status of previous versions of this specification. ---JJG793-1992. Calibration specification for vacuum helium leak

1 Scope

This specification applies to vacuum helium leaks with a leak rate value in the range of (1×10-10~1×10-4) Pa·m3/s calibration.

2 Reference documents

This specification refers to the following documents. JJF 1001-2011 General measurement terms and definitions JJF 1008-2008 Pressure measurement terms and definitions GB/T 3163-2007 Vacuum technical terms GB/T 3164-2007 Graphical symbols for vacuum technology BSEN20486.2018 Non-destructive testing leak detection gas reference leak calibration (NonDestructive Testing-LeakTesting-CalibrationofReferenceLeaksforGases) ASTME908.1998 (2012) Standard Practice for Calibration Gas Reference Leaks (Standard Practice forCalibratingGaseousReferenceLeaks) For dated reference documents, only the dated version applies to this specification; for undated references The latest version (including all amendments) is applicable to this specification.

3 Terms and units of measurement

3.1 Term 3.1.1 Leak When the pressure or concentration of the gas inside and outside the closed container is different, the gas can be leaked from one side of the wall Small holes, defects or gaps and penetration elements or leaks to the other side. [JJF 1008-2008, definition 11.31] 3.1.2 Vacuumheliumleak Leaks calibrated and used under the condition that the outlet pressure is lower than 1kPa using helium as the tracer gas. 3.1.3 Conductanceleak It can be ideally regarded as a leak in a long capillary with one or more discrete channels. [GB/T 3163-2007, definition 6.1.2] 3.1.4 Permeationleak The gas penetrates through a type of leak in the membrane (thin wall). 3.1.5 Leakrate Under specified conditions, the flow rate of a specific gas through the leak. [GB/T 3163-2007, definition 6.1.9] ......

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Tips & Frequently Asked Questions:

Question 1: How long will the true-PDF of JJF 1833-2020_English be delivered?

Answer: Upon your order, we will start to translate JJF 1833-2020_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 1833-2020_English with my colleagues?

Answer: Yes. The purchased PDF of JJF 1833-2020_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.