JJF 1905-2021 English PDFUS$529.00 · In stock
Delivery: <= 4 days. True-PDF full-copy in English will be manually translated and delivered via email. JJF 1905-2021: Calibration Specification for Magnetic Flux Meters Status: Valid
Basic dataStandard ID: JJF 1905-2021 (JJF1905-2021)Description (Translated English): Calibration Specification for Magnetic Flux Meters Sector / Industry: Metrology & Measurement Industry Standard Classification of Chinese Standard: A55 Word Count Estimation: 23,218 Issuing agency(ies): State Administration for Market Regulation JJF 1905-2021: Calibration Specification for Magnetic Flux Meters---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 Magnetic Flux Meters National Metrology Technical Specifications of the People's Republic of China Fluxmeter calibration specification Released on 2021-02-23 2021-08-23 implementation Issued by the State Administration for Market Regulation Fluxmeter calibration specification Replace JJG317-1983 Focal point. National Electromagnetic Metrology Technical Committee Main drafting unit. China Academy of Testing Technology China Institute of Metrology Participated in the drafting. Hunan Institute of Metrology and Testing Zhejiang Institute of Metrology Changsha Tianheng Measurement and Control Technology Co., Ltd. This specification entrusts the National Electromagnetic Metrology Technical Committee to be responsible for the interpretation The main drafters of this specification. Yu Xiaoxi (China Academy of Testing Technology) Zhang Wei (China Institute of Metrology) Participating drafters. Xiao Peng (China Academy of Testing Technology) Li Long (China Testing Technology Research Institute) Xu Yu (Hunan Institute of Metrology and Testing) Yu Zhishu (Zhejiang Institute of Metrology) Zhou Xinhua (Changsha Tianheng Measurement and Control Technology Co., Ltd.) table of ContentsIntroduction (Ⅱ) 1 Scope (1) 2 Reference documents (1) 3 Overview (1) 4 Measurement characteristics (1) 4.1 Zero drift (1) 4.2 Magnetic flux indication error (1) 5 Calibration conditions (1) 5.1 Environmental conditions (1) 5.2 Measurement standards and other equipment (1) 6 Calibration items and calibration methods (3) 6.1 Calibration items (3) 6.2 Calibration method (3) 7 Expression of calibration results (6) 8 Recalibration interval (7) Appendix A Measurement Uncertainty Evaluation Example of Calibration Error of Indication (8) Appendix B Calibration Original Record Format (13) Appendix C Internal Page Format of Calibration Certificate (15) Appendix D Correction method for the influence of external loop resistance on measurement results (17)IntroductionJJF 1071 "Rules for the Compilation of National Metrology and Calibration Specifications", JJF 1001 "General Metrology Terms and Definitions" and JJF 1059.1 "Evaluation and Expression of Measurement Uncertainty" together constitutes a basic series that supports the formulation of this specification specification. This specification replaces JJG317-1983 "Trial Verification Regulations for Magnetic Flux Meters". Compared with JJG317-1983, the main The technical changes are as follows. ---Added reference files; ---Metering characteristics increase the zero point drift; ---The calibration method adds the volt-second method; The previous releases of this specification are as follows. ---JJG317-1983. Fluxmeter calibration specification1 ScopeThis specification applies to the measurement range of 0.1mWb~10Wb, and the maximum allowable error is ±(0.1%~5.0%) Calibration of the fluxmeter.2 Reference documentsThe following documents are cited in this specification. JJF 1013 Commonly used terms and definitions of magnetic measurement For dated reference documents, only the dated version applies to this specification; for all undated references The latest version (including all amendments) is applicable to this specification.3 overviewFluxmeter is used for the measurement of magnetic flux. According to the display mode, it is divided into pointer type and digital type. The digital type is divided into digital Integral and analog integral. When the magnetic flux linked in the measuring coil of the fluxmeter changes, an induced electromotive force will be generated at both ends of the measuring coil. The flux meter measures the magnetic flux by integrating the induced electromotive force.4 Metrological characteristics4.1 Zero drift Under the condition that the input terminal of the flux meter coil is short-circuited, the maximum absolute value of the magnetic flux indication within 60s. 4.2 Magnetic flux indication error The magnetic flux indication error of the fluxmeter does not exceed its nominal maximum allowable error, and the maximum allowable error range is generally ±(0.1%~5.0%). Note. The above indicators are not used for eligibility judgment and are for reference only.5 Calibration conditions5.1 Environmental conditions The environmental conditions and requirements are as follows. a) Ambient temperature. (20±5)℃; b) Relative humidity. ≤80%; c) Power supply. (220±22)V, (50±1)Hz; d) There is no vibration, shock or other electromagnetic interference that obviously affects the calibration. 5.2 Measurement standards and other equipment 5.2.1 Measurement standards and other equipment used by each calibration method The measurement standards and other equipment used by each calibration method are shown in Table 1. ...... |
