EN 16465:2015

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.UD]PHUDKKunststoffe - Kalibrierverfahren für Schwarz- und Weißstandard-Thermometer und Schwarz- und Weißtafel-Thermometer für die Verwendung bei natürlicher und künstlicher BewitterungPlastiques - Méthode d’étalonnage des thermomètres à étalon noir et à étalon blanc et des thermomètres à panneau noir et à panneau blanc pour utilisation en vieillissement naturel et artificielPlastics - Calibration method of black-standard and white-standard thermometers and black-panel and white-panel thermometers for use in natural and artificial weathering83.080.01Polimerni materiali na splošnoPlastics in generalICS:Ta slovenski standard je istoveten z:EN 16465:2015SIST EN 16465:2015en,fr,de01-december-2015SIST EN 16465:2015SLOVENSKI
STANDARD
EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
EN 16465
September
t r s w ICS
z uä r z rä r s English Version
Plastics æ Methods for the calibration of blackæstandard and whiteæstandard thermometers and blackæpanel and whiteæpanel thermometers for use in natural and artificial weathering Plastiques æ Méthodes d 5étalonnage des thermomètres à étalon noir et à étalon blanc et des thermomètres à panneau noir et à panneau blanc pour utilisation en vieillissement naturel et artificiel
Kunststoffe æ Kalibrierverfahren für Schwarzæ und WeißstandardæThermometer und Schwarzæ und Weißtafelæ Thermometer für die Verwendung bei natürlicher und künstlicher Bewitterung This European Standard was approved by CEN on
s w August
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egulations which stipulate the conditions for giving this European Standard the status of a national standard without any alterationä Upætoædate lists and bibliographical references concerning such national standards may be obtained on application to the CENæCENELEC Management Centre or to any CEN memberä
translation under the responsibility of a CEN member into its own language and notified to the CENæCENELEC Management Centre has the same status as the official versionsä
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t r s w CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Membersä Refä Noä EN
s x v x wã t r s w ESIST EN 16465:2015

Characteristics of BST/WST and BPT/WPT . 15 Annex B (informative)
Example of calibration equipment . 16 Bibliography . 17
of more than 40 K above ambient air. The possible surface temperature is characterized by a white panel or white standard temperature as its lower limit, and a black panel or standard temperature as its upper limit. It is then assumed that the actual sample temperature lies between the two cited limits. Surface temperatures of specific specimens can be higher or lower (e.g. massive black polymers and transparent polymers). The white panel/standard and black panel/standard temperatures can be easily determined using conventional measuring techniques. In one category of exposure devices, only the short UV range of the natural solar radiation is simulated with fluorescent UV radiation source radiation. In these devices, there is no significant increase in surface temperature of a specimen, because these radiation sources have no significant visible and infrared radiation. An additional category of exposure devices uses a mercury medium pressure radiation source to induce critical photo-degradation reactions that are typical of natural solar exposures. Even this specific radiation source does not provide significant visible and infrared radiation. For this reason, as in the previous category, these exposures do not increase significantly the specimen surface temperature above ambient. NOTE For fluorescent UV and mercury medium pressure radiation sources, the ambient air temperature surrounding the specimen is the main variable influencing the specimen temperature. The relative humidity may have a small effect on the specimen temperature as well. Black/white standard thermometers and black/white panel thermometers are defined in EN ISO 4892-1. They are used in weathering applications to characterize the temperature level (maximum and minimum temperature) under given weathering exposure conditions. The accuracy of these thermometers depends on their design and especially on a well-defined and traceable calibration method. Such methods are the content of this standard. Two methods are defined in this standard. Each method requires calibration of a black panel/standard or white panel/standard to a traceable reference from a national metrological institute (NMI). Historically, the contact calibration method (e.g. calibration in a water bath) has been used for weathering applications: recently a contactless calibration method has been developed. Any requirement to use one method versus the other method is not justified, and both calibration methods are suitable for most weathering applications. However, because of a lack of data comparing the two methods as of the time of publication of this standard, preference or equivalency of results for these two methods is unknown. Both methods may provide different calibration results that are not interchangeable. SIST EN 16465:2015
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