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  • ASTM
    E104-85(1996) Standard Practice for Maintaining Constant Relative Humidity by Means of Aqueous Solutions
    Edition: 1996
    $82.37
    Unlimited Users per year

Description of ASTM-E104 1996

ASTM E104-85-Reapproved1996

Historical Standard: Standard Practice for Maintaining Constant Relative Humidity by Means of Aqueous Solutions




ASTM E104

Scope

1.1 This practice describes two methods for generating constant relative humidity (rh) environments in relatively small containers.

1.2 This practice is applicable for obtaining constant relative humidities ranging from dryness to near saturation at temperatures spanning from 0 to 50°C.

1.3 This practice is applicable for closed systems such as environmental conditioning containers and for the calibration of hygrometers.

1.4 This practice is not recommended for the generation of continuous (flowing) streams of constant humidity unless precautionary criteria are followed to ensure source stability. (See Section 9.)

1.5 Caution-Both saturated salt solutions and sulfuric acid-water solutions are extremely corrosive, and care should be taken in their preparation and handling. There is also the possibility of corrosive vapors in the atmospheres over the saturated salt solutions and over the sulfuric acid solution.

1.6 This standard does not purport to address all of the safety problems associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use. For more specific safety precautionary information see 1.5 and 10.1.


Keywords

Aqueous solutions; Atmospheres-conditioning/testing; Atmospheric analysis-meteorological measurements; Conditioning-electrical insulating materials; Humidity-relative; maintaining constant relative humidity, by aqueous solutions, practice


ICS Code

ICS Number Code 19.040 (Environmental testing)


DOI: 10.1520/E0104-85R96

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