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JJF 1075-2015 English PDF

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JJF 1075-2015: Calibration Specification for Clamp Ammeters
Status: Valid

JJF 1075: Evolution and historical versions

Standard ID	Contents [version]	USD	STEP2	[PDF] delivered in	Standard Title (Description)	Status	PDF
JJF 1075-2015	English	559	Add to Cart	4 days [Need to translate]	Calibration Specification for Clamp Ammeters	Valid	JJF 1075-2015
JJF 1075-2001	English	559	Add to Cart	3 days [Need to translate]	Calibration Specification of Clamp Ammeters	Obsolete	JJF 1075-2001

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Basic data

Standard ID	JJF 1075-2015 (JJF1075-2015)
Description (Translated English)	Calibration Specification for Clamp Ammeters
Sector / Industry	Metrology & Measurement Industry Standard
Classification of Chinese Standard	A55
Word Count Estimation	24,232
Date of Issue	2015-12-07
Date of Implementation	2016-06-07
Older Standard (superseded by this standard)	JJF 1075-2001
Quoted Standard	JJG 124-2005; JB/T 9285-1999
Regulation (derived from)	?AQSIQ 2015 Nian (No.148)
Issuing agency(ies)	General Administration of Quality Supervision, Inspection and Quarantine
Summary	This standard is applicable to the calibration of a Clamp ammeter with a line voltage of not more than 650 V, a DC or AC frequency of (45 to 400) Hz, and a current of 0.1 to 2 000. It is also suitable for the calibration of the multifunction clamp current function. Not suitable for calibration of clamp-type leakage ammeter.

JJF 1075-2015: Calibration Specification for Clamp Ammeters

---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 Clamp Ammeters National Metrological Technical Code of the People's Republic of China Clamp ammeter calibration specification 2015-12-07 released 2016-06-07 implementation State Administration of Quality Supervision, Inspection and Quarantine issued Clamp ammeter calibration specification Replacing JJF 1075-2001 Unit. National Electromagnetic Metrology Technical Committee The main drafting unit. Tianjin Institute of measurement supervision and inspection Participate in the drafting unit. Changsha Tianheng Measurement & Control Technology Co., Ltd This specification entrusts the National Electromagnetic Metrology Technical Committee to explain The main drafters of this specification. Ma Lianhui (Tianjin Metrology Supervision and Research Institute of Science and Technology) Liu Yong (Tianjin Metrology Supervision and Research Institute of Science and Technology) Sun Bing (Tianjin Institute of Metrology and Supervision Science and Technology) Participate in the drafters. Zhou Xinhua (Changsha Tianheng Measurement & Control Technology Co., Ltd.)

Introduction (II) 1 Scope (1) 2 References (1) 3 Overview (1) 4 Metering characteristics (1) 5 Calibration conditions (1) 5.1 Environmental conditions (1) 5.2 Measurement standards and other equipment (2) 6 Calibration items and calibration methods (3) 6.1 Calibration items (3) 6.2 Calibration method (3) 7 Calibration Results Expression (6) 8 re-school time interval (7) Appendix A Clamp Ammeter Current Measurement Uncertainty Evaluation Example (8) Appendix B Introduction and Calibration of Clamp Ammeter (11) Appendix C Clamp Ammeter Current Maximum Allowable Error Representation (15) Appendix D Clamp Ammeter Calibration Original Recording Format (16) Appendix E Clamp Ammeter Calibration Certificate Inside Page Format (18)

Introduction

This specification is based on JJF 1071-2010 "National Metrological Calibration Rules", JJF 1059.1-2012 "Measurement Uncertainty Assessment and Representation", JJF 1001-2011 "Generic Metrological Terms and Definitions". This specification is a revision of the JJF 1075-2001 "Clamp Ammeter Calibration Specification". Compared with JJF 1075-2001, the main amendments are. - the preparation of the format in line with JJF 1071-2010 "national measurement calibration rules to prepare the rules" requirements; --- The scope of application has been adjusted. The operating frequency range of the clamp ammeter is adjusted to DC or (45 ~ 400) Hz; --- to expand the current measurement range, from the original (0.1 ~ 1000) A expanded to (0.1 ~.2000) A; --- to calibrate the accuracy of the school level to 0.2; - for the expansion of the uncertainty of the k value of the re-provision, provides k = 2; - The calibration method is re-divided into four methods. 1) standard current source method; 2) standard table ratio More law; 3) standard transformer method; 4) standard resistance method; - Appendix A adds an example of the uncertainty of the current measurement of the clamp ammeter; --- Appendix B to increase the clamp ammeter calibration methods introduced and error analysis; - Appendix C increases the maximum allowable error representation of the clamp ammeter current; --- Appendix D, E Added Clamp Ammeter Calibration Original Record/Calibration Certificate Inside Page Format. The previous release of this specification is. --- JJF 1075-2001. Clamp ammeter calibration specification

1 Scope

This specification applies to line voltage not exceeding 650V, DC or AC frequency is (45 ~ 400) Hz, current (0.1 ~.2000) A clamp ammeter calibration, but also for multi-function clamp meter current function calibration. Not applicable Calibration of the clamp leakage ammeter.

2 reference file

This specification refers to the following documents. Current Meter, Voltmeter, Power Meter and Resistance Meter JB/T 9285-1999 Clamp ammeter For dated references, only the dated edition applies to this specification; references that are not dated , The latest version (including all modifications) applies to this specification.

3 Overview

Clamp ammeter (including digital, pointer) is a way to open and close the magnetic circuit in the current conductor to measure its electrical Flow of the instrument. It is characterized by no need to disconnect the loop, you can measure the current measured circuit. In accordance with the principle of measurement clamp Ammeter can be divided into transformer, Hall effect and magnetic balance and so on. The principle of the transformer clamp ammeter can only measure the AC current, Hall effect principle and the principle of magnetic balance of the clamp Flow meter can measure AC and DC current.

4 measurement characteristics

Current. Measuring range. (0.1 ~.2000) A; Operating frequency. DC or AC frequency (45 ~ 400) Hz; The maximum allowable error is shown in Table 1, where the error of the digital clamp ammeter is expressed by relative error, the pointer clamp The ammeter error is expressed as a reference error. The error representation is given in Appendix C. Table 1 clamp ammeter maximum allowable error Accuracy class 0.2 grade 0.5 grade 1.0 grade 2.0 grade 5.0 Maximum permissible error ± 0.2% ± 0.5% ± 1.0% ± 2.0% ± 5.0% Note. The above indicators are not used for qualifying, for reference only.

5 calibration conditions

5.1 Environmental conditions Ambient temperature. (20 ± 5) ℃;

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