1、D1349-14TABLE 1 Test Temperatures and Tolerances4.3.1 While a tolerance of+1C is not given in Table 1,itTestTolerance,is used in many specifications,procedures,practices,standardsTemperatures,plus or minus,or methods and it,as well as the tolerance for relative humidity.C(F)4C(F)-75(-103)2.03.6)is p
2、resented for guidance in those instances.-70(-94)2.0(3.6)-55(-672.0(3.6)4.4 The relative humidity ranges are not to be considered40(-40)2.0(3.6)exclusive.If agreed upon between customer and supplier,the-25(-132.0(3.6)relative humidity range may be selected from those given in-10142.0(3.6)0(32)4.1-4.
3、3 notwithstanding the testing temperature.The relative2.0(3.6)23(73)52.0(3.6)humidity during testing shall be recorded and reported.35(95)2.0(3.6)40(1042.0(3.6)5.Conditioning of Materials for Testing50(1222.0(3.6)55(1312.03.6)5.1 The conditioning of materials for testing does not apply70(1582.0(3.6t
4、o preparation,mixing,processing,or vulcanizing temperatures85(185)2.0(3.6)or humidity conditions for rubber compounds as these are90(194)2.0(3.6)100(2122.0(3.6)typically well defined by individual specifications,procedures,105(2212.0(3.6)practices,standards or methods.1202482.0(3.6)125(2572.0(3.6)5.
5、2 Physical and other properties of rubber are influenced by130(266)2.0(3.6)temperature and relative humidity in a manner that materially135(2752.0(3.6)affects test results.155(311)】2.03.6)160(320)20(3.6)5.3 Reliable comparisons between different materials and175(3472.0(3.6)between different laborato
6、ries are reliant upon standardized180(356)2.0(3.6200(392)3.0(5.4)temperature and relative humidity conditions to which speci-225(4373.0(5.4)mens of these materials are subjected prior to testing.250(482)3.0(5.4)275(5273.0(5.4)5.4 Conditioning of materials for testing is typically con-300(572)3.0(5.4
7、)ducted:AThe test temperature is the(set point)temperature to which the testing5.4.1 For the purpose of bringing the material into equilib-environment is controlled(tolerance).The tolerance is the maximum allowablevariation of the instruments(chamber or room)indicated temperature during testrium wit
8、h the standard laboratory atmosphere,andconditions.If the indicated temperature is beyond the tolerance,immediately5.4.2 To obtain reproducible results,regardless of a previ-implement procedures to correct the problem.ous history of exposure.Standard laboratory temperature.5.5 Any specification,proc
9、edure,practice,standard ormethod that specifies the conditioning of materials for testingshall take precedence over this practice.4.Relative Humidity for Testing5.6 Conditioning of Materials for Testing:4.1 When the tolerance for temperature is=3C,the toler-5.6.1 Materials shall be conditioned for n
10、o less than 12 h atance for relative humidity shall be no greater than 50+15the standard laboratory atmosphere(refer to 2.1.2).%RH(35 to 65%RH).5.6.2 If a greater or lesser conditioning time,temperature,or4.2 When the tolerance for temperature is+2C,the toler-relative humidity is mandated by a speci
11、fication,procedure,ance for relative humidity shall be no greater than 50+10practice,standard,method or agreement between customer and%RH(40 to 60%RH)supplier it shall be recorded and reported.4.3 When the tolerance for temperature is 1C,the toler-6.Keywordsance for relative humidity shall be no gre
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