JJG 505-2004 English PDF

US$629.00 · In stock
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JJG 505-2004: Verification Regulation of D.C.Comparator potentiometers
Status: Valid

JJG 505: Historical versions

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
JJG 505-2004	629	Add to Cart	5 days	Verification Regulation of D.C.Comparator potentiometers	Valid
JJG 505-1987	839	Add to Cart	6 days	Verification Regulation of D. C. Comparator Potentiometer	Obsolete

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Basic data

Standard ID: JJG 505-2004 (JJG505-2004)
Description (Translated English): Verification Regulation of D.C.Comparator potentiometers
Sector / Industry: Metrology & Measurement Industry Standard
Classification of Chinese Standard: A55
Classification of International Standard: 17.220
Word Count Estimation: 24,249
Date of Issue: 2004-03-02
Date of Implementation: 2004-09-02
Older Standard (superseded by this standard): JJG 505-1987
Quoted Standard: GB 3927-1983; JB/T 8611-1997
Regulation (derived from): Administration of Quality Supervision, Inspection and Quarantine No. 24 of 2004
Issuing agency(ies): State Administration of Quality Supervision, Inspection and Quarantine
Summary: Potentiometer part of this standard applies to magnetic potential self-balancing potentiometer DC Comparator and versatility DC comparator (hereinafter referred to compare ceremony potentiometer or potential difference) in the first test, test and use the subsequent test.

JJG 505-2004: Verification Regulation of D.C.Comparator potentiometers

---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 DCComparator potentiometers National Metrology Verification Regulations of the People's Republic DC comparison ceremony potentiometer Released on.2004-03-02 2004-09-02 implementation The General Administration of Quality Supervision, Inspection and Quarantine issued DC comparison ceremony potentiometer Verification procedure DCComp Replacing JJG 505-1987 This regulation was approved by the General Administration of Quality Supervision, Inspection and Quarantine on March 02,.2004, and Implemented on September 2,.2004. Focal Point. National Electromagnetic Measurement Technical Committee Drafting unit. Heilongjiang Provincial Metrology Testing and Testing Institute This procedure entrusts the National Electromagnetic Measurement Technical Committee to explain The main drafters of this procedure. Wang Yong (Heilongjiang Metrological Testing and Testing Institute) Participate in the drafters. Yang Wei (Heilongjiang Metrological Testing and Testing Institute)

table of Contents

1 Scope (1) 2 Citations (1) 3 Overview (1) 4 Metrological performance requirements (2) 4.1 Accuracy level (2) 4.2 Basic error (2) 4.3 Potential drift (3) 4.4 Low frequency noise (3) 4.5 Tracking Error (3) 4.6 Nonlinear error (3) 4.7 Primary current constancy (3) 4.8 Current Regulation Disk Indicators (3) 4.9 Ripple Voltage (3) 4.10 Primary Maximum Output Voltage (3) 4.11 galvanometer and its circuit switch indicators (3) 5 General technical requirements (3) 5.1 Appearance structure (3) 5.2 Insulation resistance (3) 5.3 Dielectric strength (3) 6 measuring instrument control (4) 6.1 Verification conditions (4) 6.2 Verification project (4) 6.3 Verification method (5) 6.4 Processing of verification results (11) 6.5 Verification cycle (12) Appendix A Linearity Self-Test Form (13) Appendix B Derivation of Linearity Self-Test Calculation Formula (17) Appendix C Format of verification certificate and verification result page (19) DC comparison ceremony potentiometer verification procedure

1 Scope

This procedure is applicable to the potential difference between the DC comparison ritual potentiometer and the multi-function DC comparator for automatic balance of magnetic potential. The first verification, subsequent verification and in-use inspection of the meter part (hereinafter referred to as comparison ceremony potentiometer or potentiometer) Test.

2 Citations

GB 3927-1983 "DC potential difference meter" JB/T 8611-1997 "DC Potentiometer" When using this procedure, care should be taken to use the current valid version of the above cited documents.

3 Overview

The comparison ritual potentiometer is adjusted by changing the number of turns of the measuring winding in the auto-balanced DC current comparator. Determining the DC current on the constant measurement resistor to obtain a constant resistance variable current differential of the continuously variable compensation voltage meter. The principle circuit is shown in Figure 1. The working principle is. primary variable measuring winding and secondary fine-tuning fixed winding Self-flowing constant DC current and variable DC current, they generate opposite magnetic potentials on the core, and the magnetic potential difference is Detecting the winding detection and adjusting the secondary current generated by the driven (servo) power supply through the differential closed-loop regulation system to make the magnetic potential Figure 1 Comparison of the principle circuit of the ritual potentiometer W1---primary variable winding, ie measuring disc; W2---secondary fixed winding with fine adjustment Automatic balance. After the potential difference meter operating current is set with a standard battery, the primary current and the secondary winding turns off. It is all constant, because the secondary current is proportional to the number of primary turns, so the compensation voltage on the measuring resistor in the secondary loop is equal. The ratio of the primary turns in the measurement to the primary turns in the timing is multiplied by the electromotive force of the standard battery. This is the turns ratio. The working principle of the comparison ritual potentiometer instead of the resistance ratio. The formula is derived as follows. a. Set the working current Connect the standard battery to both ends of the measuring resistor RAC, and measure the value of the measuring disc W1 to the standard battery after temperature correction. ......

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