JJG 51-2003 English PDF

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JJG 51-2003: Verification Regulation of Piston Pressure-Vaccum Gauge with Equilibrium Liquid Column
Status: Valid

JJG 51: Historical versions

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
JJG 51-2003	519	Add to Cart	4 days	Verification Regulation of Piston Pressure-Vaccum Gauge with Equilibrium Liquid Column	Valid
JJG 51-1983	839	Add to Cart	6 days	Verification Regulation of Second-class and Third-class Standard Piston Dead-wight Pres sure Meter and Pressure-va-cuum with Liquid Column for Balance	Obsolete
JJG 51-1959	RFQ	ASK	3 days	(Chinese Industry Standard)	Obsolete

Similar standards

GB/T 36126   JJG 139   GB/T 1885   JJG 46   JJG 49   JJF 051   

Basic data

Standard ID: JJG 51-2003 (JJG51-2003)
Description (Translated English): Verification Regulation of Piston Pressure-Vaccum Gauge with Equilibrium Liquid Column
Sector / Industry: Metrology & Measurement Industry Standard
Classification of Chinese Standard: A53
Word Count Estimation: 20,243
Date of Issue: 2003-03-05
Date of Implementation: 2003-09-01
Older Standard (superseded by this standard): JJG 51-1983
Quoted Standard: JJG 727-1991; JJG 129-1990
Issuing agency(ies): State Administration of Quality Supervision, Inspection and Quarantine
Summary: This standard applies to the measurement range (-0. 1 ~ 0. 4) MPa have to work within the reference and one or two standard piston with a balanced liquid column pressure vacuum gauge (hereinafter referred to as gauge) for initial verification and follow-up test.

JJG 51-2003: Verification Regulation of Piston Pressure-Vaccum Gauge with Equilibrium Liquid Column

---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 Piston Pressure-Vaccum Gauge with Equilibrium Liquid Column National Metrology Verification Regulations of the People's Republic Piston pressure gauge with balanced liquid column Released on.2003-03-05 2003-09-01 implementation The General Administration of Quality Supervision, Inspection and Quarantine issued Replace JJG 51-1983 This regulation was approved by the General Administration of Quality Supervision, Inspection and Quarantine on March 5,.2003, and Implemented on September 1,.2003. Focal Point. National Pressure Measurement Technical Committee Main drafting unit. Tianjin Institute of Metrology and Technology China Institute of Metrology This regulation entrusts the National Pressure Measurement Technical Committee to explain The main drafters of this procedure. Yang Deyu (Tianjin Institute of Metrology and Technology) Zhang Pengcheng (China Institute of Metrology) Participate in the drafters. Pan Zhigang (Tianjin Institute of Metrology and Technology) Cheng Zhenlai (Tianjin Institute of Metrology and Technology) Gong Fengshun (Tianjin Institute of Metrology and Technology)

table of Contents

1 Scope (1) 2 Citations (1) 3 Overview (1) 4 Metrological performance requirements (2) 4.1 Accuracy level and maximum allowable error of the pressure gauge (2) 4.2 Pressure checker sealing (2) 4.3 Piston load bearing plate plane perpendicular to the piston axis (2) 4.4 Piston no-load discriminating power (2) 4.5 Piston rotation duration (3) 4.6 piston descending speed (3) 4.7 effective area of the piston (3) 4.8 Piston full load discriminating force (4) 4.9 Allowable error of special weight quality (4) 5 General technical requirements (4) 5.1 Appearance (4) 5.2 Piston System Flexibility (4) 5.3 The number of special weights and the amount of pressure generated (5) 5.4 Motor Speed (5) 6 measuring instrument control (5) 6.1 Verification conditions (5) 6.2 Verification items and verification methods (6) 6.3 Processing of verification results (9) 6.4 Verification cycle (9) Appendix A Temperature Correction (10) Appendix B Calibration Record Format with Balanced Liquid Column Piston Pressure Vacuum Gauge (11) Appendix C Verification certificate page format (13) Appendix D Gravity Acceleration in Major Cities of China (g) (14) Calibration procedure for balanced liquid column piston pressure vacuum gauge

1 Scope

This procedure is applicable to working standards within the measurement range (-0.1~0.4) MPa and the first and second standards are flat. The first verification and subsequent verification of the liquid column piston pressure vacuum gauge (hereinafter referred to as pressure gauge).

2 Citations

JJG 727-1991 "Working Standard Piston Pressure Gauge Trial Verification Regulations" JJG 129-1990 "First-class standard piston pressure gauge verification procedures" When using this procedure, care should be taken to use the current valid version of the above cited documents.

3 Overview

Pressure gauges are mainly used to detect a variety of pressure instruments, meters, and high-accuracy measurements for pressure or evacuation. The pressure gauge is mainly composed of a piston system, a liquid tower, a special weight and a pressure checker. Between the piston system and the liquid tower Connected with a connecting pipe. Figure 1 Pressure gauge working principle diagram The working principle of the pressure gauge is shown in Figure 1. When the liquid tower is connected to the atmosphere, there is no special 砝 on the piston load-bearing plate. When the code is coded, the pressure generated by the piston and its connecting member is balanced with the pressure generated by the liquid column and the liquid column in the connecting pipe. The balance is. h(ρ液-ρ空)g= W0 A0 (1) Where. h---the vertical distance between the lower end surface of the piston and the free surface of the liquid in the liquid column, m; ρ liquid --- liquid density of the equilibrium liquid column, kg/m3; ρ空---air density, kg/m3; ......

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