1、March 2013 Translation by DIN-Sprachendienst.English price group 4No 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 7
2、7.040.10; 19.060!$v“1948399www.din.deDThis supplement provides information relating to DIN EN ISO 7500-1, but does not contain any additional specifications.DIN EN ISO 7500-1 Supplement 4Metallic materials Verification of static uniaxial testing machines Part 1: Tension/compression testing machines
3、Verification andcalibration of the force-measuring system; Supplement 4: Informationfor taking the uncertainty into account regarding the classification ofmaterial testing machines,English translation of DIN EN ISO 7500-1 Beiblatt 4:2013-03Metallische Werkstoffe Prfung von statischen einachsigen Prf
4、maschinen Teil 1: Zug- und Druckprfmaschinen Prfung und Kalibrierung derKraftmesseinrichtung; Beiblatt 4: Informationen zur Bercksichtigung derMessunsicherheit bei der Klassifizierung von Werkstoffprfmaschinen,Englische bersetzung von DIN EN ISO 7500-1 Beiblatt 4:2013-03Matriaux mtalliques Vrificati
5、on des machines pour essais statiques uniaxiaux Partie 1: Machines dessai de traction/compression Vrification et talonnage dusystme de mesure de force; Supplment 4: Information pour la prise en compte delincertitude de mesure sur la classification des machines dessais materiaux,Traduction anglaise d
6、e DIN EN ISO 7500-1 Beiblatt 4:2013-03www.beuth.deDocument comprises 4 pagesIn case of doubt, the German-language original shall be considered authoritative.02.13 DIN EN ISO 7500-1 Bbl 4:2013-03 2 A comma is used as the decimal marker. Contents Page Foreword 3 1 Scope 4 2 Taking measurement uncertai
7、nty into account when classifying materials testing machines 4 DIN EN ISO 7500-1 Bbl 4:2013-03 3 Foreword This document has been prepared by the Normenausschuss Materialprfung (Materials Testing Standards Committee), Working Committee NA 062-08-11 AA Werkstoffprfmaschinen. Attention is drawn to the
8、possibility that some of the elements of this document may be the subject of patent rights. DIN and/or DKE shall not be held responsible for identifying any or all such patent rights. DIN EN ISO 7500 consists of the following parts, under the general title Metallic materials Verification of static u
9、niaxial testing machines: Part 1: Tension/compression testing machines Verification and calibration of the force-measuring system Part 2: Tension creep testing machines Verification of the applied force For DIN EN ISO 7500-1, Metallic materials Verification of static uniaxial testing machines Part 1
10、: Tension/compression testing machines Verification and calibration of the force-measuring system the following supplements are available: Supplement 1: General for requirements, verification and calibration of tension, compression and flexion testing machines Supplement 2: General for requirements,
11、 verification and calibration of spring testing machines Supplement 3: General for requirements, verification and calibration of fatigue testing machines Supplement 4: Information for taking the uncertainty into account regarding the classification of material testing machines DIN EN ISO 7500-1 Bbl
12、4:2013-03 4 1 Scope This document is intended to provide users of DIN EN ISO 7500-1 with guidelines for taking the uncertainty of measurement into account when classifying materials testing machines. 2 Taking measurement uncertainty into account when classifying materials testing machines DIN EN ISO
13、/IEC 17025 and the DAkkS-DKD-5 Guideline state that conformity can only be assumed if measurement uncertainty has been taken into account. One practical means of taking uncertainty into account without lowering the maximum permissible values for the relative accuracy errors specified in DIN EN ISO 7
14、500-1 is to use the criteria in Table 1 for permissible limit values for uncertainty as defined by DINs Working Committee NA 062-08-11 AA. This will ensure that uncertainty is not considered twice in the classification. Thus, the values given in Table 1 of this Supplement can be used in addition to
15、the characteristic values laid down in Table 2 of DIN EN ISO 7500-1:2004-11. The values given in Table 1 below are based on experience gained in calibrations carried out in accordance with DIN EN ISO 7500-1. Table 1 Limit values for measurement uncertainty Class of machine range Limit values for exp
16、anded uncertainty % 0,5 0,3 1 0,5 2 1,1 3 1,6 Aside from this possibility, it is also possible to classify the machines using only the limit values given in DIN EN ISO 7500-1:2004-11, Table 2, while at the same time taking measurement uncertainty into consideration, or to use the current frequently
17、practised method of using DIN EN ISO 7500-1:2004-11, Table 2, for classification purposes both taking uncertainty into account and without taking uncertainty into account and then providing the user with both classification results. NOTE As regards the relatively high limit values given in Table 1 here, it should be noted that in calculating the uncertainty U, the repeatability and the resolution of the machine used for calibration also make a large contribution to uncertainty. The measurement uncertainty for the machine used for calibration is considerably lower.
