ASTM-E104 Standard Practice for Maintaining Constant Relative Humidity by Means of Aqueous Solutions

ASTM-E104 - 2020A EDITION - CURRENT
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Standard Practice for Maintaining Constant Relative Humidity by Means of Aqueous Solutions
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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 Number Code 19.040 (Environmental testing)

To find similar documents by ASTM Volume:

11.07 (Atmospheric Analysis)

To find similar documents by classification:

19.040 (Environmental testing Including testing equipment)

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Document Number

ASTM-E0104-20A

Revision Level

2020A EDITION

Status

Current

Modification Type

Reapproval

Publication Date

Dec. 21, 2020

Document Type

Practice

Page Count

5 pages

Committee Number

D22.11