Standard [CURRENT]
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This European Standard specifies traceable calibration methods of black-standard thermometers (BST), white-standard thermometers (WST), black-panel thermometers (BPT) and white-panel thermometers (WPT) for use in natural and artificial weathering: - method A, a contact method, uses a traceable calibrated resistance standard thermometer; - method B, a contactless method, uses a traceable calibrated pyrometer. A basic design of types of the thermometers is described in EN ISO 4892-1. Historically method A has been used for weathering applications for many years; method B has been developed recently. Both methods are qualified for weathering applications. They may provide different calibration results that are not interchangeable. The committee responsible for this standard is NA 054-01-04 AA "Verhalten gegen Umgebungseinflüsse" ("Environmental resistance") at DIN Standards Committee Plastics (FNK).