1、March 2017 English price group 13No 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 83.060!%c+“2640899www.din.deDIN IS
2、O 18898Rubber Calibration and verification of hardness testers (ISO 18898:2016),English translation of DIN ISO 18898:2017-03Elastomere Kalibrierung und berprfung von Hrteprfgerten (ISO 18898:2016),Englische bersetzung von DIN ISO 18898:2017-03Caoutchouc talonnage et vrification des duromtres (ISO 18
3、898:2016),Traduction anglaise de DIN ISO 18898:2017-03SupersedesDIN ISO 18898:201412www.beuth.deDocument comprises 25 pagesDTranslation by DIN-Sprachendienst.In case of doubt, the German-language original shall be considered authoritative.03.17 A comma is used as the decimal marker. 1 Scope . 52 Nor
4、mative references 53 Terms and definitions . 54 Measurands and metrological requirements for calibration and verification 54.1 Environmental conditions . 54.2 Metrological requirements . 55 Calibration and verification methods 145.1 Requirements to be met by the measuring instruments used for the ca
5、libration and verification methods 145.2 Outline of the calibration and verification methods to be used 155.2.1 Indentors . 155.2.2 Geometry of the pressure foot 155.2.3 Depth of indentation165.2.4 Contact force of the pressure foot 215.2.5 Spring force .215.2.6 Contact and total force of IRHD dead-
6、load instruments 245.2.7 Duration of force application . 256 Calibration and verification certificate 25Contents PageDIN ISO 18898:2017-03 2National foreword National Annex NA (informative) Bibliography . 34National foreword The text of this standard (ISO 18898:2016) has been prepared by Technical C
7、ommittee ISO/TC 45 “Rubber and rubber products”, Subcommittee SC 2 “Testing and analysis” (Secretariat: JISC, Japan). The responsible German body involved in its preparation was DIN-Normenausschuss Materialprfung (DIN Standards Committee Materials Testing), Working Committee NA 062-04-34 AA “Test pr
8、ocedures for physical properties of rubber”. Attention is drawn to the 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. The original ISO document ISO 18898:2016 cont
9、ained an error in Subclause 5.2.3.9, 2nd paragraph (0 IRHD instead of 30 IRHD) which has been corrected in the English and German version of this document. Furthermore, in ISO 18898:2016, 4.2, Table 10, an incorrect value of (250 null 30) mN for the force that the pressure foot creates when applying
10、 the VLRH meter is indicated. This mistake has already been corrected in the present version of DIN ISO 18898 using the correct value from ISO 27588:2012, 4.5, Table 1. The DIN Standards corresponding to the International Standards referred to in this document are as follows: ISO 48 DIN ISO 48 ISO 7
11、619-1 DIN ISO 7619-1 ISO 7619-2 DIN ISO 76192 ISO/IEC 17025 DIN EN ISO/IEC 17025 ISO 27588 DIN ISO 27588 Amendments This standard differs from DIN ISO 18898:2014-12 as follows: a) the calibration and the verification of the dead-load measuring instruments using the very low rubber hardness scale (VL
12、RH) has been included. Previous editions DIN ISO 18898: 2009-10, 2014-12 DIN ISO 18898:2017-03 3 National Annex NA (informative) Bibliography DIN EN ISO/IEC 17025, General requirements for the competence of testing and calibration laboratories DIN ISO 48, Rubber, vulcanized or thermoplastic Determin
13、ation of hardness (hardness between 10 IRHD and 100 IRHD) DIN ISO 76191, Rubber, vulcanized or thermoplastic Determination of indentation hardness Part 1: Durometer method (Shore hardness) DIN ISO 76192, Rubber, vulcanized or thermoplastic Determination of indentation hardness Part 2: IRHD pocket me
14、ter method DIN ISO 27588, Rubber, vulcanized or thermoplastic Determination of dead-load hardness using the very low rubber hardness (VLRH) scale DIN ISO 18898:2017-03 4 Rubber Calibration and verification of hardness testers1 ScopeThis International Standard specifies procedures for the calibration
15、 and verification of durometers of types A, D, AO and AM (see ISO 7619-1), IRHD pocket meters (see ISO 7619-2), IRHD dead-load instruments (see ISO 48) and dead-load instruments using the very low rubber hardness scale (see ISO 27588).2 Normative referencesThe following documents, in whole or in par
16、t, 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.ISO 48, Rubber, vulcanized or thermoplastic Determi
17、nation of hardness (hardness between 10 IRHD and 100 IRHD)ISO 7619-1, Rubber, vulcanized or thermoplastic Determination of indentation hardness Part 1: Durometer method (Shore hardness)ISO 7619-2, Rubber, vulcanized or thermoplastic Determination of indentation hardness Part 2: IRHD pocket meter met
18、hodISO 18899, Rubber Guide to the calibration of test equipmentISO 27588, Rubber, vulcanized or thermoplastic Determination of dead-load hardness using the very low rubber hardness (VLRH) scaleISO/IEC 17025, General requirements for the competence of testing and calibration laboratories3 Terms and d
19、efinitionsFor the purposes of this document, the terms and definitions given in ISO 48 and ISO 18899 apply.4 Measurands and metrological requirements for calibration and verification4.1 Environmental conditionsThe ambient temperature of the measurement room in which the calibration or verification i
20、s carried out shall be 18 C to 25 C.4.2 Metrological requirementsThe measurands of indentor and pressure foot for the instrument to be calibrated are depicted in Figures 1 to 7 and requirements are specified in Tables 1 to 10.DIN ISO 18898:2017-03 5 Figure 1 Indentor and pressure foot for type A dur
21、ometerTable 1 Type A durometerMeasurand Unit Metrological requirementCalibration and verification instructionsShaft diameter of indentor d2mm 1,25 0,15 5.2.1.2Cone frustum top diameter d3mm 0,79 0,01 5.2.1.2Cone angle of indentor 35,00 0,25 5.2.1.2Centrality of pressure foot CentralDiameter of press
22、ure foot D mm 18,0 0,5 5.2.2.1Hole diameter of pressure footd1mm 3,0 0,1 5.2.2.2Mass on pressure foot m kg100100,+5.2.4.1Depth of indentation l mm 0,00 to 2,50; l = 0,02 5.2.3.1Spring force on indentor F mNF = 550,0 + 75,0HA; F = 37,5awhere HA= hardness reading on type A durometer5.2.5.1Duration of
23、force application t s 3 or 15 5.2.7aFor hand-held durometers, the tolerance may be doubled.DIN ISO 18898:2017-03 6 Figure 2 Indentor and pressure foot for type D durometerTable 2 Type D durometerMeasurand Unit Metrological requirementCalibration and verification instructionsShaft diameter of indento
24、r d2mm 1,25 0,15 5.2.1.3Radius of indentor r mm 0,10 0,01 5.2.1.3Cone angle of indentor 30,00 0,25 5.2.1.3Centrality of pressure foot CentralDiameter of pressure foot D mm 18,0 0,5 5.2.2.1Hole diameter of pressure footd1mm 3,0 0,1 5.2.2.2Mass on pressure foot m kg500500,+5.2.4.1Depth of indentation
25、l mm 0,00 to 2,50; l = 0,02 5.2.3.2Spring force on indentor F mNF = 445,0HD; F = 222,5awhere HD= hardness reading on type D durometer5.2.5.2Duration of force application t s 3 or 15 5.2.7aFor hand-held durometers, the tolerance may be doubled.DIN ISO 18898:2017-03 7 Figure 3 Indentor and pressure fo
26、ot for type AO durometerTable 3 Type AO durometerMeasurand Unit Metrological requirementCalibration and verification instructionsRadius of indentor R mm 2,50 0,02 5.2.1.4Centrality of pressure foot CentralArea of pressure foot A mm2500 minimum 5.2.2.1Hole diameter of pressure footd1mm 5,4 0,2 5.2.2.
27、2Mass on pressure foot m kg100100,+5.2.4.1Depth of indentation l mm 0,00 to 2,50; l = 0,02 5.2.3.3Spring force on indentor F mNF = 550,0 + 75,0HAO; F = 37,5awhere HAO= hardness reading on type AO durometer5.2.5.3Duration of force application t s 3 or 15 5.2.7aFor hand-held durometers, the tolerance
28、may be doubled.DIN ISO 18898:2017-03 8 Figure 4 Indentor and pressure foot for type AM durometerTable 4 Type AM durometerMeasurand Unit Metrological requirementCalibration and verification instructionsShaft diameter of indentor d2mm 0,790 0,025 5.2.1.5Radius of indentor r mm 0,10 0,01 5.2.1.5Cone an
29、gle of indentor 30,00 0,25 5.2.1.5Centrality of pressure foot CentralDiameter of pressure foot D mm 9,0 0,3 5.2.2.1Hole diameter of pressure footd1mm 1,19 0,03 5.2.2.2Mass on pressure foot m kg025005000,+5.2.4.1Depth of indentation l mm 0,00 to 1,25; l = 0,01 5.2.3.4Spring force on indentor F mNF =
30、324,0 + 4,4HAM; F = 8,8 where HAM= hardness reading on type AM durometer5.2.5.4Duration of force application t s 3 or 15 5.2.7DIN ISO 18898:2017-03 9 Figure 5 Indentor and pressure foot for IRHD dead-load testerTable 5 IRHD dead-load method NMeasurand Unit Metrological requirementCalibration and ver
31、ification instructionsBall diameter of indentor d2mm 2,50 0,01 5.2.1.6Centrality of pressure foot CentralDiameter of pressure foot D mm 20 1 5.2.2.1Hole diameter of pressure footd1mm 6 1 5.2.2.2Force on pressure foot FfN 8,3 1,5 5.2.4.2Incremental indentation depthl mml = f(IRHD) (see Table 15)l = 0
32、,015.2.3.5Contact force on indentor FcN 0,30 0,02 5.2.6.1Total force on indentor FtN 5,70 0,03 5.2.6.1Duration of application of total force, tt, and contact force, tcs tt= 30; tc= 5 5.2.7DIN ISO 18898:2017-03 10 Table 6 IRHD dead-load method HMeasurand Unit Metrological requirementCalibration and v
33、erification instructionsBall diameter of indentor d2mm 1,00 0,01 5.2.1.6Centrality of pressure foot CentralDiameter of pressure foot D mm 20 1 5.2.2.1Hole diameter of pressure footd1mm 6 1 5.2.2.2Force on pressure foot FfN 8,3 1,5 5.2.4.2Incremental indentation depthl mml = f(IRHD) (see Table 16)l =
34、 0,015.2.3.6Contact force on indentor FcN 0,30 0,02 5.2.6.1Total force on indentor FtN 5,70 0,03 5.2.6.1Duration of application of total force, tt, and contact force, tcs tt= 30; tc= 5 5.2.7Table 7 IRHD dead-load method LMeasurand Unit Metrological requirementCalibration and verification instruction
35、sBall diameter of indentor d2mm 5,00 0,01 5.2.1.6Centrality of pressure foot CentralDiameter of pressure foot D mm 22 1 5.2.2.1Hole diameter of pressure footd1mm 10 1 5.2.2.2Force on pressure foot FfN 8,3 1,5 5.2.4.2Incremental indentation depthl mml = f(IRHD) (see Table 17)l = 0,015.2.3.7Contact fo
36、rce on indentor FcN 0,30 0,02 5.2.6.1Total force on indentor FtN 5,70 0,03 5.2.6.1Duration of application of total force, tt, and contact force, tcs tt= 30; tc= 5 5.2.7DIN ISO 18898:2017-03 11 Table 8 IRHD dead-load method MMeasurand Unit Metrological requirementCalibration and verification instruct
37、ionsBall diameter of indentor d2mm 0,395 0,005 5.2.1.6Centrality of pressure foot CentralDiameter of pressure foot D mm 3,35 0,15 5.2.2.1Hole diameter of pressure footd1mm 1,00 0,15 5.2.2.2Force on pressure foot FfmN 235 30 5.2.4.3Incremental indentation depthl mml = f(IRHD) (see Table 18)l = 0,0025
38、.2.3.8Contact force on indentor FcmN 8,3 0,5 5.2.6.2Total force on indentor FtmN 153,3 1,0 5.2.6.2Duration of application of total force, tt, and contact force, tcs tt= 30; tc= 5 5.2.7DIN ISO 18898:2017-03 12 Figure 6 Indentor and pressure foot for IRHD pocket meterTable 9 IRHD pocket meterMeasurand
39、 Unit Metrological requirementCalibration and verification instructionsBall diameter of indentor d2mm 1,575 0,025 5.2.1.6Centrality of pressure foot CentralSize of pressure foot S mmlength of side 20,0 2,5 if square or diameter 22,5 2,5 if circular5.2.2.1Hole diameter of pressure footd1mm 2,5 0,5 5.
40、2.2.2Depth of indentation l mml = f(IRHD) (see Table 19)l = 0,025.2.3.9Spring force on indentor F N 2,65 0,15 5.2.5.5Duration of force application t s 3 or 15 5.2.7DIN ISO 18898:2017-03 13 Figure 7 Indentor and pressure foot for VLRH meterTable 10 VLRH meterMeasurand Unit Metrological requirementCal
41、ibration and verification instructionsBall diameter of indentor d2mm 2,5 0,01 5.2.1.7Centrality of pressure foot CentralDiameter of pressure foot D mm 6,0 0,50 5.2.2.1Hole diameter of pressure footd1mm 3,0 0,10 5.2.2.2Depth of indentation l ml = f(VLRH) (see Table 20)l = 55.2.3.10Force on pressure f
42、oot FfmN 250 30 5.2.4.4Pre force on indentor FCmN 8,3 0,5 5.2.6.3Indenting force on indentor FtmN 100,0 1,0 5.2.6.3Duration of pre force applicationtCs 5 5.2.7Duration of indenting force applicationtts 30 5.2.75 Calibration and verification methods5.1 Requirements to be met by the measuring instrume
43、nts used for the calibration and verification methodsThe uncertainty of measurement of the measuring instruments used for the calibration and verification methods shall not be greater than 0,2 times the tolerances specified in 4.2.Alternative instruments to those mentioned in 5.2 may be used provide
44、d the required uncertainty of measurement is complied with and these instruments allow the calibration or verification methods to be carried out effectively.DIN ISO 18898:2017-03 14 5.2 Outline of the calibration and verification methods to be used5.2.1 Indentors5.2.1.1 GeneralA coordinate-measuring
45、 device (for example, a measuring microscope) or a profile projector is suitable for measuring the indentors.5.2.1.2 Type A durometerBy means of the measuring device, verify the geometric requirements of the indentor as illustrated in Figure 1 and listed in Table 1.5.2.1.3 Type D durometerBy means of the measuring device, verify the geometric requirements of the indentor as illustrated in Figure 2 and listed in Table 2.5.2.1.4 Type AO durometerBy means of the measuring device, verify the indentor diameter as illust
