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JJG 42-2011

Search Result of Chinese Standard: 'JJG 42-2011'
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JJG 42-2011English879 Add to Cart Days<=6 Verification Regulation of Working Glass Hydrometers Valid JJG 42-2011
JJG 42-2011Chinese27 Add to Cart <=1-day [PDF from Chinese Authority, or Standard Committee, or Publishing House]

   
Detail Information of JJG 42-2011; JJG42-2011
Description (Translated English): Verification Regulation of Working Glass Hydrometers
Sector / Industry: Metrology & Measurement Industry Standard
Classification of Chinese Standard: A53
Word Count Estimation: 38,312
Date of Issue: 2011-09-20
Date of Implementation: 2012-03-20
Older Standard (superseded by this standard): JJG 42-2001
Quoted Standard: JJF 1229-2009; JJG 2094-2010; GB/T 17764-2008
Drafting Organization: China Institute of Metrology
Administrative Organization: National Technical Committee of the mass and density measurement
Regulation (derived from): AQSIQ Announcement No. 153 of 2011
Issuing agency(ies): State Administration of Quality Supervision, Inspection and Quarantine
Summary: This standard applies to the density meter, petroleum hydrometer, alcohol meter, glucose meter, milk meter, meter, soil quality Fixed Operating Glass Hydrometers (hereinafter referred to as floating meter) of the initial verification, testing and use of follow-up checks. This procedure does not apply less than 650kg/cubic meter petroleum hydrometer density range of the test.


JJG 42-2011
Verification Regulation of Working Glass Hydrometers
State verification procedures People's Republic of China
Working glass hydrometers
WorkingGlassHydrometers
Issued on: 2011-09-20
2012-03-20 implementation
The State Administration of Quality Supervision, Inspection and Quarantine released
Working glass hydrometers test procedures
VerificationRegulationof
WorkingGlassHy
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drometers
Replacing JJG 42-2001
The regulations by the State Administration of Quality Supervision, Inspection and Quarantine approved on September 20, 2011, and from
From March 20, 2012 into effect.
Focal point: the quality and density measurement technology committee
The main drafting units: China Institute of Metrology
Participated in the drafting unit: Liaoning Provincial Institute of Metrology
Jizhou City Yaohua instrument Factory
This procedure commissioned by the quality and density measurement technology committee responsible for the interpretation
The main drafters of this procedure:
Xu Chang Hong (China Institute of Metrology)
Chen Zhaohui (China Institute of Metrology)
Gu Yingzi (China Institute of Metrology)
Drafters participate:
Mengshu Yan (Liaoning Provincial Institute of Metrology)
Xu Yan hair (Jizhou Yaohua instrument Factory)
table of Contents
1 Scope (1)
2. References (1)
3 terminology and units of measurement (1)
4 Overview (1)
4.1 Several common hydrometers assumed conversion between the scale and density (2)
5 metering performance requirements (3)
6 General Requirements (3)
6.1 Appearance (3)
6.2 standard temperature (3)
Labeled 6.3 (3)
7 control of measuring instruments (4)
7.1 test conditions (4)
7.2 test items and test methods (7)
7.3 test results processing (11)
7.4 test cycle (11)
Appendix A 0 ℃ ~ 40 ℃ water density meter (excluding air) (12)
Appendix B 20 ℃ when aqueous ethanol volume fraction and density ρ q conversion table (14)
Appendix C 20 ℃ when the mass fraction of the sugar solution and the density ρ p conversion table (15)
Appendix D 20 ℃ when the degree of milk (m °) and the density ρ20 conversion table (16)
Appendix E 20 ℃ when soil degree (s °) and the density ρ20 conversion table (17)
Appendix F 20 ℃ when Baume (Bh) and the density ρ20 conversion table (18)
Appendix G less dense than liquid water capillary constant α (19)
Appendix H is greater than the density of liquid water capillary constant α (21)
Appendix J potassium iodide aqueous mercury capillary constant α (24)
Appendix K sugar solution capillary constant α (25)
Appendix L air density calculating equation (26)
Appendix M wet air density meter (27)
Appendix N hydrostatic weighing method original recording density test 1 (29)
Appendix P hydrostatic weighing method original recording density test 2 (30)
Appendix Q test certificate-page format (31)
Appendix R test results in the notice page format (32)
Working glass hydrometers test procedures
1 Scope
The order applies to density meter, a fixed quality hydrometer, alcohol meter, glucose meter, milk meter, meter soil, etc.
Type working glass hydrometers (hereinafter referred to as hydrometers) initial verification, use and subsequent verification check.
This procedure does not apply less than 650kg/m3 density range of petroleum hydrometer test.
2. References
JJF1229-2009 mass density measurement terminology and definitions
JJG 2094-2010 density measuring instruments Verification System
GB/T 17764-2008 densitometer calibration structure and principles
For dated references, only the dated edition applies to this procedure; undated reference documents
Member, the latest edition (including any amendments) applies to this procedure.
3 terminology and units of measurement
The relative density of 3.1 relativedensity
Under specified conditions, than the material density ρ1 and ρ2 of reference material density, represented by d. See equation (1):
d = ρ1/ρ2 (1)
Note: d-free units that dimensionless quantity.
In the field of density measurement, reference materials commonly used for liquid and solid water, usually with respect to gas
Its gas pressure and dry air at the same temperature. For example, the statutes of seawater density meter scale relative density single
Bit, meaning the ratio of the density of seawater at 17.5 ℃ when the density of pure water at 17.5 ℃, the symbol d17.517.5 to represent.
3.2 hydrostatic weighing method hydrostaticweighing
Based on Archimedes' principle, by weighing immersed in the liquid glass hydrometers suffered in the steady state the size of buoyancy
To determine the volume of immersed portion of the meter and calculate floating point density value method.
4 Overview
Float glass is a meter in the liquid free-floating vertically, by its immersion depth in the liquid to directly measure the fluid
Density, relative density or concentration of the instrument, the structure shown in Fig.
Figure 1, the upper part of the glass hydrometers dry tube top seal, uniform diameter elongated tube, close the tube has a press density,
The relative density or concentration of marker ruler. Body is conical or hemispherical bottom (to avoid air bubbles attached) hollow
Cylinder, the lower part is made of glass partitions or other structures made of ballast compartment, interior filled with small lead pellets or other suitable
Filler for ballast.
Related standard:   JJF 042-2008  JJG 46-2018
   
 
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