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JJG 462-2004 English PDF

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JJG 462-2004: Verification Regulation of Secondary Standard Ionization Vacuum Gauges
Status: Obsolete

JJG 462: Evolution and historical versions

Standard IDContents [version]USDSTEP2[PDF] delivered inStandard Title (Description)StatusPDF
JJG 462-2004English679 Add to Cart 4 days [Need to translate] Verification Regulation of Secondary Standard Ionization Vacuum Gauges Obsolete JJG 462-2004
JJG 462-1986English719 Add to Cart 5 days [Need to translate] Verification Regulation of Secondary Standard Ionization Vacuum Gauge Obsolete JJG 462-1986

PDF similar to JJG 462-2004


Standard similar to JJG 462-2004

GB/T 36126   JJG 475   GB/T 1885   JJG 159   JJG 126   JJG 461   

Basic data

Standard ID JJG 462-2004 (JJG462-2004)
Description (Translated English) Verification Regulation of Secondary Standard Ionization Vacuum Gauges
Sector / Industry Metrology & Measurement Industry Standard
Classification of Chinese Standard A53
Classification of International Standard 17.100
Word Count Estimation 16,138
Date of Issue 2004-09-21
Date of Implementation 2005-03-21
Older Standard (superseded by this standard) JJG 462-1986
Quoted Standard 2004 technical regulations issued by national metrology (industrial measurement 2005 Volume 15, Issue 1)
Regulation (derived from) 2004 technical regulations issued by national metrology (industrial measurement 2005 Volume 15, Issue 1)
Issuing agency(ies) State Administration of Quality Supervision, Inspection and Quarantine
Summary This standard applies to measuring range (5 �� 10 ^ (-4) ~ 1 �� 10 ^ (-1)) Pa's second standard ionization vacuum gauge initial verification, testing and use of follow-up inspection.

JJG 462-2004: Verification Regulation of Secondary Standard Ionization Vacuum Gauges

---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.
Verification Regulation of Secondary Standard Ionization Vacuum Gauges National Metrology Verification Regulations of the People's Republic Second-class standard ionization gauge Released on.2004-09-21 2005-03-21 implementation The General Administration of Quality Supervision, Inspection and Quarantine issued Second-class standard ionization vacuum gauge verification procedure Replace JJG 462-1986 This regulation was approved by the General Administration of Quality Supervision, Inspection and Quarantine on September 21,.2004, and It will take effect on March 21,.2005. Focal Point. National Pressure Measurement Technical Committee Main drafting unit. China Institute of Metrology Dalian Metrology Testing Institute Participated in drafting unit. Beijing Xinghua Vacuum Meter Factory This regulation entrusts the National Pressure Measurement Technical Committee to explain The main drafters of this procedure. Yu Hongyan (China Institute of Metrology) Zhao Shiyan (China Institute of Metrology) Qu Chuanmin (Dalian Metrology Testing Institute) Participate in the drafters. Xu Ziyong (Beijing Xinghua Vacuum Instrument Factory)

table of Contents

1 Scope (1) 2 Overview (1) 3 Metrological performance requirements (2) 3.1 Control unit (2) 3.2 indication check (2) 4 General technical requirements (2) 4.1 Control Unit (2) 4.2 Regulation (3) 5 measuring instrument control (3) 5.1 Verification conditions (3) 5.2 Verification project (3) 5.3 Verification method (4) 5.4 Processing of verification results (7) 5.5 Verification cycle (8) Appendix A Verification Certificate (inside page) format (9) Appendix B Verification Result Notice (inside page) format (10) Appendix C Verification Record Format (11) Second-class standard ionization vacuum gauge verification procedure

1 Scope

This procedure is applicable to the first inspection of a second-class standard ionization vacuum gauge with a measurement range of (5×10-4~1×10-1) Pa. Determination, follow-up verification and in-use inspection.

2 Overview

The second-class standard ionization vacuum gauge consists of a control unit and a standard regulation (hereinafter referred to as regulation). The working principle of the second-class standard ionization vacuum gauge (Fig. 1) is based on the gas pressure p and gas to be measured under certain conditions. The ion current Ii is proportional, and the formula is as follows. p=1S Ie (1) Where p---the gas pressure to be tested, Pa; S---regulation coefficient, Pa-1; Ii---collecting the ion current, A; Ie---emission current, A. Figure 1 Working principle of ionization vacuum gauge Va-acceleration pole to cathode center point voltage; Vf-cathode center point to ground voltage; Ie-emission current; Ii-collector ion current; A-accelerator; F-cathode; C-collector When the regulatory factor is verified, the formula (1) can be written as S=1p0 Ie (2) Where p0---standard pressure, Pa.

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Question 5: Should I purchase the latest version JJG 462-2004?

Answer: Yes. Unless special scenarios such as technical constraints or academic study, you should always prioritize to purchase the latest version JJG 462-2004 even if the enforcement date is in future. Complying with the latest version means that, by default, it also complies with all the earlier versions, technically.