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JJF 1012-2007

JJF 1012-2007_English: PDF (JJF1012-2007)
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JJF 1012-2007English309 Add to Cart Days<=3 Humidity and Moisture Metrological Terms and Their Definitions JJF 1012-2007 Valid JJF 1012-2007
 

BASIC DATA
Standard ID JJF 1012-2007 (JJF1012-2007)
Description (Translated English) Humidity and Moisture Metrological Terms and Their Definitions
Sector / Industry Metrology & Measurement Industry Standard
Classification of Chinese Standard A61
Classification of International Standard 17.020
Word Count Estimation 13,152
Date of Issue 2007-11-21
Date of Implementation 2008-05-21
Older Standard (superseded by this standard) JJF 1012-1987
Quoted Standard AQSIQ Announcement No. 188 of 2007
Drafting Organization China Institute of Metrology
Administrative Organization National Technical Committee of Physics stoichiometric measurement
Regulation (derived from) AQSIQ Announcement No. 188 of 2007
Issuing agency(ies) State Administration of Quality Supervision, Inspection and Quarantine
Summary This standard specifies the humidity and moisture measurement on common terminology and definitions.

JJF 1012-2007
Humidity and Moisture Metrological Terms and Their Definitions
People's Republic of China National Metrology Technical Specifications
Humidity and moisture measurement terminology and definitions
Posted 2007-11-21
2008-05-21 implementation
The State Administration of Quality Supervision, Inspection and Quarantine released
Humidity and moisture measurement
Terminology and Definitions
Replacing JJF 1012-1987
This specification by the State Administration of Quality Supervision, Inspection and Quarantine approved on November 21, 2007, and from
From May 21, 2008 into effect.
Focal point. the National Technical Committee stoichiometric physical
The main drafting units. China Institute of Metrology
Participated in the drafting unit. Shanghai Institute of Measurement and Testing
This specification by the responsible National Technical Committee stoichiometric physical interpretation
The main drafters of this specification.
Zhan Yuan (China Institute of Metrology)
Drafters participate.
Ren Changqing (China Institute of Metrology)
Yi Hong (China Institute of Metrology)
Zhang Wendong (Shanghai Institute of Measurement and Testing)
table of Contents
1 Scope (1)
2 humidity measurement terms and definitions (1)
3 Moisture measurement terms and definitions (6)
Appendix A humidity and moisture measurement terminology commonly used symbols and units (8)
Humidity and moisture measurement terminology and definitions
1 Scope
This specification defines a common terminology and definitions related to humidity and moisture measurement.
2 humidity measurement terms and definitions
2.1 steam watervapour
Also known as water vapor. Water, gas, gasification or sublimation of water ice is made.
2.2 dry gas drygas
Without water vapor gas.
NOTE. absolutely free dry gas is water vapor does not exist, so-called dry gas is only relative.
2.3 moisture wetgas
Dry gas and steam mixture composed.
2.4 dry air dryair
Air-free steam.
2.5 wet air wetair
Dry air and water vapor mixture composed.
2.6 saturated saturation
Water vapor or ice to reach dynamic equilibrium state.
2.7 saturation moisture saturatedgas
Achieve dynamic equilibrium moisture at a given temperature.
NOTE. Saturated moisture certain temperature, equal to the dew point temperature.
2.8 water vapor absorption absorptionofwatervapour
Water molecules penetrate into the interior of the object principle.
Water vapor adsorption adsorptionofwatervapour 2.9
Water molecules attached to the surface of the object.
2.10 vapor desorption desorptionofwatervapour
Water molecules from the surface or inside the object, contrary absorption or adsorption processes and the role of water vapor.
2.11 humidity humidity
Gas water vapor content.
2.12 mass mixing ratio mixingratio
Than the moisture vapor quality and mass of dry gas, also known as the mixing ratio r.
Note. The reference humidity hygrometer --- gravimetric method is based on the quality of the definition of the mixing ratio established.
r = mvma
(Kg/kg)
Where. mv --- mass of water vapor, kg;