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JJF 1923-2021 English PDF

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JJF 1923-2021: Calibration Specification for Verification Equipment of Electrical Measuring Devices
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Basic data

Standard ID JJF 1923-2021 (JJF1923-2021)
Description (Translated English) Calibration Specification for Verification Equipment of Electrical Measuring Devices
Sector / Industry Metrology & Measurement Industry Standard
Classification of Chinese Standard A55
Word Count Estimation 35,311
Issuing agency(ies) State Administration for Market Regulation

JJF 1923-2021: Calibration Specification for Verification Equipment of Electrical Measuring Devices


---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 calibration device of electrical measuring instrument) National Metrology Technical Specification of the People's Republic of China Calibration specification for calibration devices for electrical measuring instruments Published on 2021-10-18 2022-04-18 Implementation Released by the State Administration for Market Regulation Calibration specification for calibration devices for electrical measuring instruments Focal Point. National Electromagnetic Metrology Technical Committee Main drafting unit. Henan Institute of Metrology State Grid Hubei Electric Power Company Electric Power Research Institute China Electric Power Research Institute Co., Ltd. Participating in the drafting unit. Changsha Tianheng Measurement and Control Technology Co., Ltd. Fluke Test Instruments (Shanghai) Co., Ltd. Shenzhen Kelu Precision Instrument Co., Ltd. This specification entrusts the National Electromagnetic Metrology Technical Committee to be responsible for the interpretation The main drafters of this specification. Chen Qingping (Henan Institute of Metrology) Ning Liang (Henan Institute of Metrology) Shen Li (State Grid Hubei Electric Power Company Electric Power Research Institute) Zhao Sha (China Electric Power Research Institute Co., Ltd.) Participating drafters. Deng Zhijun (Changsha Tianheng Measurement and Control Technology Co., Ltd.) Yang Shengli [Fluke Test Instruments (Shanghai) Co., Ltd.] Zhou Fan (Shenzhen Kelu Precision Instrument Co., Ltd.)

content

Introduction (Ⅱ) 1 Scope(1) 2 References (1) 3 Overview(1) 4 Metrology Characteristics(1) 4.1 Accuracy class(1) 4.2 Short-term stability(2) 4.3 Load Regulation(2) 4.4 Waveform Distortion(2) 4.5 Symmetry(2) 4.6 DC ripple(2) 5 Calibration Conditions(2) 5.1 Environmental conditions (2) 5.2 Measurement standards and other equipment(2) 6 Calibration items and calibration methods (2) 6.1 Calibration items (2) 6.2 Calibration method(3) 7 Expression of calibration results (13) 8 Recalibration interval(13) Appendix A Example of AC Voltage Calibration Uncertainty Evaluation(14) Appendix B Calibration Raw Record Format(17) Appendix C Calibration Certificate Inside Page Format (24)

Introduction

This specification is based on JJF 1071-2010 "Rules for Compilation of National Metrology Calibration Specifications", JJF 1059.1-2012 "Measurement Uncertainty Evaluation and Representation" was compiled. This specification is published for the first time. Calibration specification for calibration devices for electrical measuring instruments

1 Scope

This specification applies to the calibration of the calibration device for electrical measuring instruments of class 0.05 and below (hereinafter referred to as the calibration device). The calibration device has single-phase or three-phase AC voltage, current, frequency, power and phase output functions, and can have direct Current voltage, DC current output function. In this specification, the upper limit of AC voltage is 1000V, the upper limit of AC current is 100A, and the frequency range is 40Hz~ 70Hz; the upper limit of DC voltage is 1000V, and the upper limit of DC current is 100A.

2 Reference documents

This specification references the following documents. GB/T 15637-2012 General Specification for Digital Multimeter Calibrator 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 Overview

The calibration device is composed of a signal output unit, a standard measurement unit and a control display unit, etc. It is generally used for calibration/ Calibrate single-phase or three-phase voltmeter, ammeter, power meter and other AC and DC measuring instruments, its structure can be divided into meter source There are two types. integrated type and table source separated type.

4 Metrology characteristics

4.1 Accuracy class The accuracy level and maximum allowable error of the calibration device are shown in Table 1. Table 1 Accuracy class and maximum allowable error of calibration device Features maximum allowable error Level 0.05 Level 0.1 Level 0.2 AC voltage, current ±0.05% ±0.1% ±0.2% Active power ±0.05% ±0.1% ±0.2% Reactive power ±0.1% ±0.2% ±0.5% Phase/(°) ±0.1 ±0.2 ±0.5 Frequency/Hz ±0.01 ±0.02 ±0.05 DC voltage, current ±0.05% ±0.1% ±0.2% Note. The maximum allowable error of other functions except phase and frequency refers to the guide error, which is expressed as a percentage.

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