Plastics. Small enclosures for conditioning and testing using aqueous solutions to maintain the humidity at constant value
Plastics. Small enclosures for conditioning and testing using aqueous solutions to maintain the humidity at constant value
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1 Scope This International Standard establishes guidelines for the construction and use of enclosures with volumes less than 200 dm 3 , in order to obtain atmospheres of constant relative humidity at given temperatures, using saturated aqueous salt solutions, glycerol/water solutions or sulfuric acid/water solutions, for conditioning and testing plastics. It specifies the procedures to be followed to maintain the relative humidities of the conditioning and testing atmospheres within the required tolerances, at the temperatures specified by particular International Standards. The procedures described are intended for conditioning small quantities of materials prior to test, and for such tests as may be carried out entirely within a small enclosure, e.g. electrical tests. The guidelines described do not apply to enclosures requiring frequent opening.
Другие стандарты BS