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GB/T 40661-2021: Calibration specification of measurement instrument for power frequency magnetic field
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| GB/T 40661-2021 | English | 409 |
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Calibration specification of measurement instrument for power frequency magnetic field
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GB/T 40661-2021
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Basic data | Standard ID | GB/T 40661-2021 (GB/T40661-2021) | | Description (Translated English) | Calibration specification of measurement instrument for power frequency magnetic field | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | A75 | | Word Count Estimation | 22,230 | | Issuing agency(ies) | State Administration for Market Regulation, China National Standardization Administration | GB/T 40661-2021: Calibration specification of measurement instrument for power frequency magnetic field
---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 of measurement instrument for power frequency magnetic field
ICS 17.220.20
CCSA75
National Standards of People's Republic of China
Calibration specification for power frequency magnetic field measuring instrument
Released on 2021-10-11
2022-05-01 implementation
State Administration for Market Regulation
Issued by the National Standardization Management Committee
Table of contents
Foreword Ⅰ
1 Scope 1
2 Normative references 1
3 Overview 1
4 General requirements 1
5 Calibration parameter requirements 2
6 Calibration conditions 2
7 Calibration items and calibration methods 3
8 Calibration result processing 4
9 Calibration interval 5
Appendix A (informative) Calibration method of power frequency electric field measuring instrument 6
Appendix B (Informative) Calibration Record Form of Power Frequency Magnetic Field Measuring Instrument 12
Appendix C (Informative) Uncertainty Evaluation Method for Calibration Results of Power Frequency Magnetic Field Measuring Instruments 15
Reference 19
Foreword
This document is in accordance with the provisions of GB/T 1.1-2020 "Guidelines for Standardization Work Part 1.Structure and Drafting Rules of Standardization Documents"
Drafting.
Please note that some of the contents of this document may involve patents. The issuing agency of this document is not responsible for identifying patents.
This document was proposed and managed by the National Electromagnetic Compatibility Standardization Technical Committee (SAC/TC246).
Drafting organizations of this document. China Electric Power Research Institute Co., Ltd., China National Accreditation Center for Conformity Assessment, State Grid Electric Power Research Institute
Institute of Wuhan Nanrui Co., Ltd.
The main drafters of this document. Wu Xiong, Zhang Jiangong, Wang Yanzhao, Chen Di, Wu Yongkang, Wan Hao, Zhang Zeping, Lu Yao, Li Ni, Zhang Guangzhou, He Wei.
Calibration specification for power frequency magnetic field measuring instrument
1 Scope
This document specifies the general requirements, calibration parameter requirements, calibration conditions, calibration items and calibration methods, calibration results for power frequency magnetic field measuring instruments.
Requirements such as fruit, calibration interval, etc.
This document is applicable to new-manufactured, in-use, and repaired magnetic field measuring instruments that measure power frequency magnetic induction with a rated frequency of 50 Hz
Calibration.
Note. Refer to Appendix A for the calibration method of the power frequency electric field measuring instrument for measuring the power frequency electric field intensity.
2 Normative references
The content of the following documents constitutes an indispensable clause of this document through normative references in the text. Among them, dated quotations
Only the version corresponding to the date is applicable to this document; for undated reference documents, the latest version (including all amendments) is applicable to
This document.
GB/T 17626.8 Electromagnetic compatibility test and measurement technology Power frequency magnetic field immunity test
3 overview
The power frequency magnetic field measuring instrument is composed of a sensing unit, a signal processing and a display unit. It can be split or integral. When measuring
The sensing unit is fixed at the measuring position through a bracket and a support.
Commonly used power frequency magnetic field measuring instruments are electromagnetic induction type and Hall effect type. Electromagnetic induction type is generated in the detection coil based on AC magnetic flux
The principle of induced electric potential works and is suitable for measuring the magnetic field generated by a high-power source. The Hall effect type is affected by the current flow through the semiconductor material.
The principle that the magnetic field perpendicular to the surface generates voltage at both ends works, and it is suitable for measuring the magnetic field generated by various power sources.
4 General requirements
4.1 The housing of the power frequency magnetic field measuring instrument should have sufficient mechanical strength, and the combination with the bracket, support, and handle should be reliable and not loose.
4.2 The plugs and sockets used to insert the signal transmission line between the working units of the power frequency magnetic field measuring instrument should have a locking mechanism.
4.3 For measuring instrument units that use batteries, there should be an instruction to replace the battery when the battery power is low.
4.4 There should be a nameplate mark on the housing of the power frequency magnetic field measuring instrument, which includes.
---name;
---Model specifications;
---Manufacturing plant;
---Product number;
--- Error limit (can also be included in the manual);
---Sensitive direction (if not marked, it is the normal direction).
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