ASTM C657-1993(2008) 玻璃直流体电阻系数的标准试验

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【英文标准名称】:StandardTestMethodforD-CVolumeResistivelyofGlass
【原文标准名称】:玻璃直流体电阻系数的标准试验
【标准号】:ASTMC657-1993(2008)
【标准状态】:现行
【国别】:美国
【发布日期】:1993
【实施或试行日期】:
【发布单位】:美国材料与试验协会(US-ASTM)
【起草单位】:C14.04
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:
【英文主题词】:D-cvolumeresistivity;Electricalresistance/resistivity;Glass;Volumeresistivity
【摘要】:Thisexperimentalprocedureyieldsmeaningfuldataforthedcvolumeresistivityofglass.Itisdesignedtominimizespacecharge,builduppolarizationeffects,andsurfaceconductances.Thetemperaturerangeislimitedtoroomtemperaturetotheannealingpointofthespecimenglass.1.1Thistestmethodcoversthedeterminationofthedcvolumeresistivityofasmooth,preferablypolished,glassbymeasuringtheresistancetopassageofasmallamountofdirectcurrentthroughtheglassatavoltagehighenoughtoassureadequatesensitivity.Thiscurrentmustbemeasuredundersteady-stateconditionsthatisneitherachargingcurrentnoraspace-charge,builduppolarizationcurrent.1.2Thistestmethodisintendedforthedeterminationofresistivitieslessthan1016x03A9;x00B7;cminthetemperaturerangefrom25x00B0;Ctotheannealingpointoftheglass.1.3Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.Forspecifichazardstatements,seeSection5.
【中国标准分类号】:Q30
【国际标准分类号】:81_040_10
【页数】:5P.;A4
【正文语种】:英语


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Product Code:SAE AS81714
Title:Terminal Junction System (TJS), Environment Resistant, General Specification For
Issuing Committee:Ae-8c2 Terminating Devices And Tooling Committee
Scope:This specification covers Terminal Junction System (TJS) components which are used for interconnection of wiring and incorporation of passive components (see 6.1). These environment resistant components have in common the use of crimp type external pin contacts in accordance with MIL-C-39029/1 for Series I or crimp type external socket contacts in accordance with MIL-C-39029/22 for Series II. This family of TJS components is designed to operate continuously over a temperature range of -65°C to 200°C, using any combination of temperatures generated by the electrical load and ambient temperature so that the maximum internal hot spot, combined temperature, will not exceed the maximum specified for the class of TJS component, unless otherwise specified (1.2, 3.1). The components making up the system and covered by this specification include:(a) Terminal junction bussing blocks (6.8.2) (1) Feedback type (6.8.2.1) (2) Feedthrough type (6.8.2.2)(b) Racks (mounting holders) for blocks (6.8.3)(c) Brackets, block mounting (6.8.4)(d) Wire in-line junctions (6.8.5)(e) Grounding terminal (6.8.6)(f) Grounding blocks (6.8.7)(g) Electronic blocks (6.8.8)(h) Electronic in-line junctions (6.8.9)【英文标准名称】:OverheadandGantryCranes(TopRunningBridge,SingleorMultipleGirder,TopRunningTrolleyHoist)
【原文标准名称】:高架和龙门起重机(单梁或多梁顶行桥架、顶行起重机)
【标准号】:ANSI/ASMEB30.2-2001
【标准状态】:作废
【国别】:美国
【发布日期】:2001
【实施或试行日期】:
【发布单位】:美国国家标准学会(US-ANSI)
【起草单位】:ANSI
【标准类型】:()
【标准水平】:()
【中文主题词】:桥式起重机;提升装置;安全
【英文主题词】:liftingequipment;cranes;liftingdevices;maintenance;power-operated;portalcranes;safety;installations;inspection;bridgecranes;hoists;girdersystem
【摘要】:
【中国标准分类号】:J80
【国际标准分类号】:53_020_20
【页数】:
【正文语种】:英语