DIN EN 16465-2015 Plastics - Methods for the calibration of black-standard and white-standard thermometers and black-panel and white-panel thermometers for use in natural and artif.pdf

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1、December 2015 English price group 11No part of this translation may be reproduced without prior permission ofDIN Deutsches Institut fr Normung e. V., Berlin. Beuth Verlag GmbH, 10772 Berlin, Germany,has the exclusive right of sale for German Standards (DIN-Normen).ICS 83.080.01!%J|P“2398945www.din.d

2、eDIN EN 16465Plastics Methods for the calibration of black-standard and white-standard thermometers and black-panel and white-panel thermometers for use in natural and artificial weathering;English version EN 16465:2015,English translation of DIN EN 16465:2015-12Kunststoffe Kalibrierverfahren fr Sch

3、warz- und Weistandard-Thermometer und Schwarz- und Weitafel-Thermometer fr die Verwendung bei natrlicher und knstlicher Bewitterung;Englische Fassung EN 16465:2015,Englische bersetzung von DIN EN 16465:2015-12Plastiques Mthodes dtalonnage des thermomtres talon noir et talon blanc et des thermomtres

4、panneau noir et panneau blanc pour utilisation en vieillissement naturel et artificiel;Version anglaise EN 16465:2015,Traduction anglaise de DIN EN 16465:2015-12www.beuth.deDTranslation by DIN-Sprachendienst.In case of doubt, the German-language original shall be considered authoritative.Document co

5、mprises 19 pages 12.15 DIN EN 16465:2015-12 2 A comma is used as the decimal marker. National foreword This document (EN 16465:2015) has been prepared by Technical Committee CEN/TC 249 “Plastics” (Secretariat: NBN, Belgium). The responsible German body involved in its preparation was DIN-Normenaussc

6、huss Kunststoffe (DIN Standards Committee Plastics), Working Committee NA 054-01-04 AA Verhalten gegen Umgebungseinflsse. The European Standards referred to in this document have been published as DIN EN ISO Standards with the same number. EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 16465 S

7、eptember 2015 ICS 83.080.01 English Version Plastics - Methods for the calibration of black-standard and white-standard thermometers and black-panel and white-panel thermometers for use in natural and artificial weathering Plastiques - Mthodes dtalonnage des thermomtres talon noir et talon blanc et

8、des thermomtres panneau noir et panneau blanc pour utilisation en vieillissement naturel et artificiel Kunststoffe - Kalibrierverfahren fr Schwarz- und Weistandard-Thermometer und Schwarz- und Weitafel-Thermometer fr die Verwendung bei natrlicher und knstlicher Bewitterung This European Standard was

9、 approved by CEN on 15 August 2015. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such nat

10、ional standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN member. This European Standard exists in three official versions (English, French, German). A version in any other language made by translation under the responsibility of a CEN member into its own lang

11、uage and notified to the CEN-CENELEC Management Centre has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece

12、, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey andUnited Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG CEN

13、-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels 2015 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 16465:2015 EEN 16465:2015 (E) 2 Contents Page European foreword . 3 Introduction 4 1 Scope 6 2 Normative references

14、6 3 Terms and definitions . 6 4 Abbreviated terms 7 5 Principle . 7 6 Method A. 7 6.1 General 7 6.2 Apparatus . 7 6.2.1 Master reference thermometer . 7 6.2.2 Thermally insulated device . 8 6.2.3 Test chamber 8 6.2.4 Radiation source 8 6.2.5 Sample holder . 8 6.2.6 Air flow 9 6.2.7 Ambient air 9 6.3

15、 Calibration procedure . 9 6.3.1 Principle . 9 6.3.2 Calibration procedure 10 6.4 Calibration report 11 7 Method B 11 7.1 Apparatus 11 7.1.1 General . 11 7.1.2 Test chamber . 12 7.1.3 Radiation source . 12 7.1.4 Holder . 12 7.1.5 Air flow . 12 7.1.6 Blower 12 7.1.7 Pyrometer . 12 7.1.8 Chamber air t

16、emperature and relative humidity . 13 7.2 Calibration procedure 13 7.2.1 Principle 13 7.2.2 Emissivity () . 13 7.2.3 Calibration process 13 7.3 Calibration report 14 Annex A (informative) Characteristics of BST/WST and BPT/WPT . 15 Annex B (informative) Example of calibration equipment 16 Bibliograp

17、hy . 17 DIN EN 16465:2015-12EN 16465:2015 (E) 3 European foreword This document (EN 16465:2015) has been prepared by Technical Committee CEN/TC 249 “Plastics”, the secretariat of which is held by NBN. This European Standard shall be given the status of a national standard, either by publication of a

18、n identical text or by endorsement, at the latest by March 2016, and conflicting national standards shall be withdrawn at the latest by March 2016. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN and/or CENELEC shall not be he

19、ld responsible for identifying any or all such patent rights. According to the CEN-CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estoni

20、a, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. DIN EN 16465:2015-12EN 16

21、465:2015 (E) 4 Introduction The relevant weather factors with regard to material testing both outdoors and in devices include natural and simulated solar radiation, heat, humidity and rain as well as pollutants in the air. Different technologies are available to simulate natural solar radiation in a

22、 weathering device. One category of exposure devices, which include xenon-arc weathering devices and devices using metal halide gas discharge radiation source, is designed to simulate the entire spectral range of natural solar radiation. In these instruments and like natural solar radiation, the ult

23、raviolet, the visible and the infrared radiation during exposure increases the specimen surface temperature above the ambient air temperature of the surrounding air. As an influencing weathering variable, heat is characterized by the sample surface temperature. Absorbed solar radiation can heat the

24、surface to a temperature up to a T 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 tempera

25、ture 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 ca

26、tegory 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 inf

27、rared 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

28、 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 sp

29、ecimen 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 minimu

30、m 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 calib

31、ration 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 bee

32、n 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

33、of results for these two methods is unknown. Both methods may provide different calibration results that are not interchangeable. DIN EN 16465:2015-12EN 16465:2015 (E) 5 The European Committee for Standardization (CEN) draws attention to the fact that it is claimed that compliance with Method B of t

34、his document may involve the use of European patent EP1500920, concerning the surface temperature calibration process discussed in 7.2.3. CEN takes no position concerning the evidence, validity and scope of these patent rights. The holder of these patent rights has ensured CEN that he is willing to

35、negotiate licenses under reasonable and non-discriminatory terms and conditions with applicants throughout the world. In this respect, the statement of the holder of these patent rights is registered with CEN. Information may be obtained from: Atlas Material Testing Technology GmbH Intellectual Prop

36、erty Vogelsbergstr. 22 D-63589 Linsengericht-Altenhalau Germany Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights other than those identified above. CEN shall not be held responsible for identifying any or all such patent rights. DIN

37、 EN 16465:2015-12EN 16465:2015 (E) 6 1 Scope 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

38、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. NOTE 1 Historically method A has been used for weathering applications f

39、or 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. NOTE 2 Annex A gives information on the characteristics of BST/WST and BPT/WPT. 2 Normative references The followi

40、ng documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. EN ISO 291, Plasti

41、cs Standard atmospheres for conditioning and testing (ISO 291) EN ISO 4892-1, Plastics Methods of exposure to laboratory light sources Part 1: General guidance (ISO 4892-1) 3 Terms and definitions For the purposes of this document, the following terms and definitions apply. 3.1 master reference ther

42、mometer MRT instrument traceable to a national metrological institute (NMI) 3.2 reference calibration thermometer RCT instrument used in an accredited calibration laboratory to calibrate a field calibration thermometer (FCT) 3.3 field calibration thermometer FCT instrument used to realize a standard

43、 measurement value with respect to a recognized master reference thermometer with a stated path of traceability to recognized standards and a stated measurement uncertainty Note 1 to entry: Field calibration thermometers are used to calibrate BST/BPT or WST/WPT field thermometers in weathering devic

44、es (for daily use). DIN EN 16465:2015-12EN 16465:2015 (E) 7 3.4 field thermometer instrument used permanently outdoor or in a laboratory accelerated-weathering device used for the routine measurement of temperature, with a calibration traceable to a reference calibration thermometer 4 Abbreviated te

45、rms BPT black-panel thermometer (uninsulated black panel thermometer) BST black-standard thermometer (or insulated black panel thermometer) MRT master reference thermometer NMI national metrological institute RTD resistance thermometer detector WPT white-panel thermometer (uninsulated white panel th

46、ermometer) WST white-standard thermometer (or insulated white panel thermometer) 5 Principle To characterize surface temperature of specimens which are exposed to weathering conditions, either BST and WST or BPT and WPT are used, all of them combining a coated panel, an electrical sensor element, an

47、d a monitoring system. The thermometer to be calibrated is exposed to natural or artificial radiation under controlled conditions and adjusted to the temperature reading of an independent and traceable temperature measuring system. Method A is a contact method using a master reference thermometer tr

48、aceable to a NMI standard thermometer and method B is a non-contact method using a master reference pyrometer traceable to a NMI standard thermometer. Any requirement to prefer one method versus the other method is not permitted. However, because of a lack of data comparing the two methods as of the

49、 time of publication of this standard, equivalency of results of these two methods is unknown. 6 Method A 6.1 General This calibration method consists of the calibration (contact method) and additional verification in a test chamber with exposure to a radiation source. 6.2 Apparatus 6.2.1 Master reference thermometer A master reference thermometer that is calibrated traceable to a national metrology institute (NMI) and/or a designated institute