1 Scope
This standard specifies the characteristics and use of a standard atmosphere for conditioning, for determining the physical and mechanical properties of textiles and a standard alternative atmosphere that maybe used if agreed between parties.
2 Terms and Definitions
For the purpose of this document, the following terms and definitions apply.
2.1
Standard atmosphere
Environment of controlled relative humidity and temperature in which textiles are conditioned and tested.
2.2
Relative humidity
Ratio, expressed as a percentage, of the actual pressure of the water vapour in the atmosphere to the saturation vapour pressure at the same temperature and at the same pressure.
2.3
Tolerance
Difference between the upper and lower tolerance limits.
2.4
Tolerance zone
Variate values of the characteristics between and including the tolerance limits.
2.5
Tolerance limits
Specified values of the characteristic giving upper and/or lower bounds of the permissible value.
2.6
Uncertainty of measurement
Parameter, associated with the result of measurement, that characterizes the dispersion of the values that could reasonably be attributed to the measurand.
2.7
Resolution(of displaying device)
Smallest difference between indications of displaying that can be meaningfully distinguished.
2.8
Rapid conditioning
A conditioning method to reach an identical counterbalance effect to textile in standard atmosphere and make the speed faster obviously than that in standard atmosphere.
3 Requirements
3.1 Standard atmosphere
Standard atmospheres shall have a temperature of 20.0℃ and a relative humidity of 65.0%. 3.2 Standard alternative atmosphere
The alternative atmosphere may be used only if the parties involved agree on its use.
3.2.1 Standard specific atmosphere
Standard specific atmosphere shall have a temperature of 23.0℃ and a relative humidity of 50.0%.
3.2.2 Standard tropical atmosphere
For tropical zone, standard atmosphere shall have a temperature of 27.0℃ and a relative humidity of 65.0%.
3.3 Tolerance zone for the standard atmosphere and for the standard alternative atmosphere
The tolerance for temperature is ±2.0℃ and the tolerance for relative humidity is ±4.0%.
Note: For control of standard atmospheres, see Annex A.
Foreword I
1 Scope
2 Terms and Definitions
3 Requirements
4 Apparatus
5 Procedures
6 Test Report
Annex A (Normative) Control of Standard Atmosphere
Annex B (Informative) Tolerance Zone
Annex C (Informative) Comparison Table of Relative Humidity
