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JJG 982-2022 English PDF

US$419.00 · In stock
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JJG 982-2022: D. C. Resistance Boxes
Status: Valid

JJG 982: Evolution and historical versions

Standard ID	Contents [version]	USD	STEP2	[PDF] delivered in	Standard Title (Description)	Status	PDF
JJG 982-2022	English	419	Add to Cart	4 days [Need to translate]	D. C. Resistance Boxes	Valid	JJG 982-2022
JJG 982-2003	English	719	Add to Cart	3 days [Need to translate]	Verification Regulation of D.C.Resistance Box	Obsolete	JJG 982-2003

Standard similar to JJG 982-2022

JJG 134 JJG 249 JJG 972

Basic data

Standard ID	JJG 982-2022 (JJG982-2022)
Description (Translated English)	D. C. Resistance Boxes
Sector / Industry	Metrology & Measurement Industry Standard
Word Count Estimation	19,187
Date of Issue	2022-09-26
Date of Implementation	2023-03-26
Issuing agency(ies)	State Administration for Market Regulation

JJG 982-2022: D. C. Resistance Boxes

---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.
DC Resistance Boxes National Metrology Verification Regulations of the People's Republic of China DC resistance box Released on 2022-09-26 2023-03-26 Implementation Released by the State Administration for Market Regulation Verification Regulations for DC Resistance Box Replace JJG 982-2003 Responsible unit. National Electromagnetic Metrology Technical Committee Main drafting unit. Henan Institute of Metrology China Institute of Metrology Guangdong Institute of Metrology Participating in the drafting unit. Sanmenxia Nonferrous Metals Quality Research Institute Liaoning Institute of Metrology This regulation entrusts the National Electromagnetic Metrology Technical Committee to be responsible for interpretation The main drafters of this regulation. Zhu Xiaoming (Henan Institute of Metrology) Wang Zhuo (Henan Institute of Metrology) Liang Bo (National Institute of Metrology) Gu Ying (Guangdong Institute of Metrology) Participating drafters. Chen Qingping (Henan Institute of Metrology) Wu Bing (Sanmenxia Nonferrous Metal Quality Research Institute) Liang Guoding (Liaoning Institute of Metrology)

Introduction (Ⅱ) 1 Scope(1) 2 References(1) 3 terms(1) 4 Overview(1) 5 Metrological performance requirements (2) 5.1 Basic error(2) 5.2 Year Stability(2) 5.3 Accuracy classes(3) 5.4 Residual resistance(3) 5.5 Switching variation(3) 6 General technical requirements (4) 6.1 Appearance and logo (4) 6.2 Insulation resistance(4) 7 Measuring Instrument Control(4) 7.1 Test conditions (4) 7.2 Verification items (5) 7.3 Verification method (6) 7.4 Year Stability(7) 7.5 Processing of verification results (7) 7.6 Verification period(7) Appendix A Digital voltmeter method to test the working principle of DC resistance box (8) Appendix B DC Resistance Box Verification Original Record Format (9) Appendix C Inspection Certificate/Inner Page Format of Inspection Result Notification (Page 2) (11) Appendix D Test Certificate/Test Result Notification Result Page Format (Page 3) (12)

Introduction

This procedure is based on JJF1002-2010 "National Metrology Verification Regulations Writing Rules", JJF1001-2011 "General Metrology Terms and Definitions" and JJF1059.1-2012 "Assessment and Expression of Measurement Uncertainty" as the basic system Compilation of column specifications. This regulation is a revision of JJG 982-2003 "DC Resistance Box". Compared with JJG 982-2003, except In addition to editorial revisions, the changes in the relevant technical parts are mainly as follows. --- Modified the accuracy level and resistance value range; --- Delete the power frequency withstand voltage test; --- Canceled the stability assessment of the 0.01-level DC resistance box; --- Added multi-range resistance box switch variation measurement performance requirements; --- Increased annual stability test items; --- Modified the switch variation measurement method. The previous releases of this regulation are as follows. ---JJG 982-2003. Verification Regulations for DC Resistance Box

1 Scope

This regulation is applicable to accuracy grade 0.005 and below, resistance value range (10-3~108) Ω, line insulation The initial verification, subsequent verification and in-use inspection of DC resistance boxes with an edge voltage not greater than 650V. This regulation does not apply to DC resistance boxes and AC resistance boxes that are used as internal components of the instrument or developed due to special requirements. box verification.

2 References

This procedure references the following documents. JJG 166 DC resistor JJG 2051 DC resistance measuring instrument verification system table JJF1094 Characteristic evaluation of measuring instruments JB/T 8225-1999 Laboratory DC resistors For dated references, only the dated version applies to this regulation; for undated references document, its latest version (including all amendments) applies to this regulation.

3 terms

3.1 decade resistor resistordecade A multi-valued resistor in which a combination of resistance values is selected by a switching device in equal ascending steps, each step being equivalent to a decade Increment of resistance value (eg 0.1Ω, 1Ω or 10Ω,). Note. Decimal resistors generally allow selection of 10, 11 or 12 resistance values (including zero). The decade resistor in the DC resistance box is also called Make decade resistance discs or decade discs. 3.2 residual resistance residual resistance The switching device has a DC resistance box with a zero position. When all the switching devices are in the zero position, the DC resistance box outputs terminal resistance value. The DC resistance box without zero gear for the switching devices, when all the switching devices are placed at the minimum position, the DC resistance box Resistor value at the output. 3.3 Switch variation variationofswitch Under the condition that other influencing quantities remain unchanged, the resistance value of the output terminal caused by turning the switch of the DC resistance box is the largest amount of change.

4 Overview

The DC resistance box is mainly used to test the resistance measuring instruments of various grades, and can also be used as an adjustment resistor in the DC circuit. It is a switch-type physical resistor that can continuously output multiple resistance values in the DC state. It is composed of several known resistor plates in series By changing the position of the switch, the resistance value can be changed in certain steps within a known range. direct current

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