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JJG 837-2003 English PDF

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Q: Should I purchase the latest version JJG 837-2003?

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US$469.00 · In stock
Delivery: <= 3 days. True-PDF full-copy in English will be manually translated and delivered via email.
JJG 837-2003: Verification Regulation of D.C. low Resistance Meters
Status: Valid

JJG 837: Historical versions

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
JJG 837-2003	469	Add to Cart	3 days	Verification Regulation of D.C. low Resistance Meters	Valid
JJG 837-1993	359	Add to Cart	3 days	Verification Regulation of D.C. Low Resistance Meter	Obsolete

Similar standards

JJF 1234 JJG 376 JJF 1107 JJG 892 JJG 843 JJG 842

Basic data

Standard ID: JJG 837-2003 (JJG837-2003)
Description (Translated English): Verification Regulation of D.C. low Resistance Meters
Sector / Industry: Metrology & Measurement Industry Standard
Classification of Chinese Standard: A55
Word Count Estimation: 18,117
Date of Issue: 2003-09-23
Date of Implementation: 2004-03-23
Older Standard (superseded by this standard): JJG 837-1993
Quoted Standard: JJF 1059-1999; GB 4793.1-1995; GB/T 13978-1992
Regulation (derived from): State Administration of Quality Supervision, Inspection and Quarantine Notice 2003 No. 106
Issuing agency(ies): State Administration of Quality Supervision, Inspection and Quarantine
Summary: This standard applies to 0. 05 grade 1-5 DC analog and digital indication has milliohms, micro-ohm or lower range of low DC resistance measurement instruments (hereinafter referred to as low-resistance meter) of the initial verification, testing and use of the follow-up test. This procedure does not apply to the exchange of low-resistance test table.

JJG 837-2003: Verification Regulation of D.C. low Resistance 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.
Verification Regulation of DClow Resistance Meters National Metrology Verification Regulations of the People's Republic DC low resistance meter Released on.2003-09-23 2004-03-23 implementation The General Administration of Quality Supervision, Inspection and Quarantine issued Replace JJG 837-1993 This verification procedure was approved by the General Administration of Quality Supervision, Inspection and Quarantine on September 23,.2003. It will be implemented as of March 23,.2004. Focal Point. National Electromagnetic Measurement Technical Committee Main drafting unit. Henan Institute of Metrology and Testing Participated in the drafting unit. Jiangsu Institute of Metrology and Testing Technology China Institute of Metrology This procedure entrusts the National Electromagnetic Measurement Technical Committee to explain The main drafters of this procedure. Yang Mingjing (Henan Province Metrology and Testing Institute) Wang Zhuo (Henan Province Metrology and Testing Institute) Participate in the drafters. Zhao Jun (Henan Province Metrology and Testing Institute) Liu Wenfang (Henan Province Metrology and Testing Institute) Fan Yi (Jiangsu Institute of Metrology and Testing Technology) Wu Hao (China Institute of Metrology)

1 Scope (1) 2 Citations (1) 3 Overview (1) 4 Metrology performance requirements (1) 4.1 Base value error (1) 4.2 Accuracy level (2) 4.3 Lifting and Deterioration (2) 5 General technical requirements (2) 5.1 Appearance and power check (2) 5.2 Panel and nameplate (2) 5.3 Insulation resistance (2) 5.4 Power Frequency Withstand Voltage Test (3) 6 measuring instrument control (3) 6.1 Verification conditions (3) 6.2 Verification project (4) 6.3 Verification method (4) 6.4 Processing of verification results (6) 6.5 verification period (6) Appendix A DC Low Resistance Meter Schematic (7) Appendix B Digital Low Resistance Meter Verification Original Record Back Format (8) Appendix C Analog Indicating Low Resistance Meter Verification Original Record Back Format (9) Appendix D DC Low Resistance Meter Verification Certificate (inside page) format (10) Appendix E DC Low Resistance Meter Verification Result Notification (inside page) format (13) DC low resistance meter verification procedure

1 Scope

This procedure applies to DC analog indicators and digital versions from 0.05 to 5 with milliohms, micro-ohms or lower ranges. The first verification, subsequent verification and in-use inspection of the DC low-value resistance measuring instrument (hereinafter referred to as the low-resistance meter) Test. This procedure does not apply to the verification of AC low resistance meters.

2 Citations

This procedure refers to the following documents. JJF1059-1999 "Measurement and Expression of Measurement Uncertainty" GB 4793.1-1995 "Safety requirements for electrical equipment for measurement, control and laboratory use" GB/T 13978-1992 "General technical conditions for digital multimeters" When using this procedure, care should be taken to use the current valid version of the above cited documents.

3 Overview

The low resistance meter is a low value resistance measuring instrument with milliohm, micro ohm or lower range, which can measure the resistance of the coil, Wire resistance, contact resistance, welding resistance and riveting resistance. The instrument generally uses a four-terminal connection method to eliminate the connection. The effects of contact resistance and lead resistance. The basic principle of the commonly used low resistance meter is to make a constant DC current pass through the measured resistance, and then measure the resistance. The pressure drop at the end is then converted into a resistance value and reflected directly from the meter. The commonly used low resistance meter consists of a constant current source, a voltage sampling processing unit, and an indication (display). The block diagram is shown in Appendix A, and there are low-resistance meters using other principles, such as high-current low-voltage with fast double-sampling comparison method. Low resistance meter with resistance and voltage ratio.

4 Metrological performance requirements

4.1 Base value error 4.1.1 Base value error representation of analog indicating low resistance meter E=RX-R0R0 ×100% (1) Where. E---base value error; RX---the reading value of the watched table (resistance indication value); R0---The measured value of the measured resistance of the meter. 4.1.2 Base value error of digital low resistance meter 4.1.2.1 Absolute error representation Δ=±(a%RX b%Rm) (2) ......

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Tips & Frequently Asked Questions:

Question 1: How long will the true-PDF of JJG 837-2003_English be delivered?

Answer: Upon your order, we will start to translate JJG 837-2003_English as soon as possible, and keep you informed of the progress. The lead time is typically 1 ~ 3 working days. The lengthier the document the longer the lead time.

Question 2: Can I share the purchased PDF of JJG 837-2003_English with my colleagues?

Answer: Yes. The purchased PDF of JJG 837-2003_English will be deemed to be sold to your employer/organization who actually pays for it, including your colleagues and your employer's intranet.

Question 3: Does the price include tax/VAT?

Answer: Yes. Our tax invoice, downloaded/delivered in 9 seconds, includes all tax/VAT and complies with 100+ countries' tax regulations (tax exempted in 100+ countries) -- See Avoidance of Double Taxation Agreements (DTAs): List of DTAs signed between Singapore and 100+ countries

Question 4: Do you accept my currency other than USD?

Answer: Yes. If you need your currency to be printed on the invoice, please write an email to Sales@ChineseStandard.net. In 2 working-hours, we will create a special link for you to pay in any currencies. Otherwise, follow the normal steps: Add to Cart -- Checkout -- Select your currency to pay.

Question 5: Should I purchase the latest version JJG 837-2003?

Answer: Yes. Unless special scenarios such as technical constraints or academic study, you should always prioritize to purchase the latest version JJG 837-2003 even if the enforcement date is in future. Complying with the latest version means that, by default, it also complies with all the earlier versions, technically.