NF EN ISO 483
Plastics - Small enclosures for conditioning and testing using aqueous solutions to maintain relative humidity at a constant value
ISO 483:2005 establishes guidelines for the construction and use of enclosures with volumes less than 200 dm3, 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.
ISO 483:2005 establishes guidelines for the construction and use of enclosures with volumes less than 200 dm3, 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.
- Avant-proposiv
- Introductionv
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1 Domaine d'application1
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2 Références normatives1
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3 Principe1
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4 Réactifs2
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5 Solutions aqueuses2
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6 Appareillage4
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7 Mode opératoire4
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7.1 Généralités4
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7.2 Méthode A: utilisation de solutions salines aqueuses saturées5
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7.3 Méthode B: utilisation de solutions aqueuses de glycérol5
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7.4 Méthode C: utilisations de solutions aqueuses d'acide sulfurique6
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8 Tolérances des atmosphères normales7
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8.1 Généralités7
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8.2 Tolérances courantes7
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8.3 Tolérances réduites7
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9 Fidélité et biais8
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10 Rapport d'essai8
- Annexe A (normative) Caractéristiques générales d'une enceinte de conditionnement d'un volume de 15 dm3 à 200 dm39
- Bibliographie11
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