JJG 614-2004 English PDF

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JJG 614-2004: Verification Regulation of Secondary Standard Mercury Barometers
Status: Obsolete

JJG 614: Historical versions

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
JJG 614-2004	599	Add to Cart	3 days	Verification Regulation of Secondary Standard Mercury Barometers	Obsolete
JJG 614-1989	359	Add to Cart	3 days	Verification Regulation of Secondary Standard Mercury Barometer	Obsolete

Similar standards

GB/T 36126   JJG 646   GB/T 1885   JJG 608   JJG 621   JJF 605   

Basic data

Standard ID: JJG 614-2004 (JJG614-2004)
Description (Translated English): Verification Regulation of Secondary Standard Mercury Barometers
Sector / Industry: Metrology & Measurement Industry Standard
Classification of Chinese Standard: A53
Classification of International Standard: 17.100
Word Count Estimation: 15,191
Date of Issue: 2004-09-21
Date of Implementation: 2005-03-21
Older Standard (superseded by this standard): JJG 614-1989
Quoted Standard: 2004 technical regulations issued by national metrology (industrial measurement 2005 Volume 15, Issue 1)
Regulation (derived from): 2004 technical regulations issued by national metrology (industrial measurement 2005 Volume 15, Issue 1)
Issuing agency(ies): State Administration of Quality Supervision, Inspection and Quarantine
Summary: This standard applies to second-class standard mercury barometer (hereinafter referred to as the standard barometer) of the initial verification, testing and use of follow-up inspection.

JJG 614-2004: Verification Regulation of Secondary Standard Mercury Barometers

---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 Secondary Standard Mercury Barometers National Metrology Verification Regulations of the People's Republic Second-class standard mercury barometer Released on.2004-09-21 2005-03-21 implementation The General Administration of Quality Supervision, Inspection and Quarantine issued Second-class standard mercury barometer verification procedure StandardMercury Barometers Replace JJG 614-1989 This regulation was approved by the General Administration of Quality Supervision, Inspection and Quarantine on September 21,.2004, and It will take effect on March 21,.2005. Focal Point. National Pressure Measurement Technical Committee Main drafting unit. National Meteorological Station This regulation entrusts the National Pressure Measurement Technical Committee to explain The main drafters of this procedure. Lu Wenhua (National Meteorological Station) Li Jianying (National Meteorological Station) Chang Shicong (National Meteorological Station) Participate in the drafters. Wang Cheng (National Meteorological Station)

table of Contents

1 Scope (1) 2 Terms and units of measurement (1) 2.1 Tube pressure drop (1) 2.2 Air leak rate (1) 3 Overview (1) 4 Metrology performance requirements (1) 5 General technical requirements (1) 5.1 Appearance (1) 5.2 Vacuum degree (2) 5.3 Mercury (2) 6 measuring instrument control (2) 6.1 Verification conditions (2) 6.2 Verification project (2) 6.3 Verification method (2) 6.4 Verification result processing (5) 6.5 verification period (5) Appendix A Zero Adjustment Method (6) Appendix B Threshold g0 (n, α) (7) Appendix C Standard Mercury Barometer Calibration Record (8) Appendix D Verification Certificate (inside page) format (9) Appendix E Format of the verification result (inside page) format (10) Second-class standard mercury barometer verification procedure

1 Scope

This procedure is applicable to the first verification and subsequent verification of the second-class standard mercury barometer (hereinafter referred to as the standard barometer). And in-use inspection.

2 terms and units of measure

2.1 tube pressure drop The pressure differential value of the pipe is the standard pressure output port and the standard mercury barometer. The pressure difference between the sensing surfaces, in hPa. 2.2 Air leak rate The rate of leakage (rateoftheleakgas) is the amount of change in pressure per unit time due to leakage. Unit. hPa·min-1.

3 Overview

The standard barometer measures the atmospheric pressure by the principle that the gravity of the mercury column in the vacuum glass tube is balanced with the atmospheric pressure. Forceful. Standard barometers are used for the measurement of atmospheric pressure and the transfer of values. Standard barometer types are classified into plain and high prototype.

4 Metrological performance requirements

The corrected value of the measured pressure value of the standard barometer does not exceed ±0.30hPa, and the measured pressure value is corrected to the maximum allowable value. The error is ±0.20 hPa.

5 General technical requirements

5.1 Appearance 5.1.1 The inner tube of the glass shall be straight and the inner wall shall be smooth and clean, and there shall be no shortage of bubbles, gas wires and stones that may affect the measurement. The trap should be uniform and the inner diameter should be uniform. The centerline of the upper working section and the lower working section should be coaxial with the centerline of the outer casing. 5.1.2 The ruler line should be clear, the index should be even, and the color should be firm. The main ruler should match the vernier ruler. The vernier ruler when the zero line of the vernier is aligned with any reticle on the main ruler The tail line should be aligned with the corresponding score line on the main ruler. 5.1.3 The movement of the vernier scale adjustment mechanism should be flexible and stable, and can stay at any position without loosening or scratching. Outer tube. The vernier scale should not swing when you rotate the trim nut. After the adjustment is stopped, there must be no displacement. Ruler support and zero The front and rear edges of the bit window should be flat and in a plane perpendicular to the axis of the outer casing. 5.1.4 The metal outer casing should be straight. The front and rear window holes should be parallel to each other, and the axis of the line and the outer sleeve should be the same In-plane. ......

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