【英文标准名称】:Hearingaids;hearingaidequipmentnotentirelywornonthelistener;identicalwithIEC60118-3:1983
【原文标准名称】:助听器.第3部分:不完全戴在听者身上的助听设备
【标准号】:DINIEC60118-3-1989
【标准状态】:作废
【国别】:德国
【发布日期】:1989-07
【实施或试行日期】:
【发布单位】:德国标准化学会(DE-DIN)
【起草单位】:
【标准类型】:()
【标准水平】:()
【中文主题词】:试验;声学;电气工程;声学试验;测量技术;电声器件;测量;助听器;声试验
【英文主题词】:Acoustictesting;Acoustics;Acoustoelectricdevices;Electricalengineering;Electroacoustics;Hearingaids;Measurement;Measuringtechniques;Testing
【摘要】:Objektofthisstandardistodescribeamethodofdeterminingtheoverallelectroacousticperformanceofhearingaidequipmentnotentirelywornonthelistener,usedintherehabilitationofpersonshavingimpairedhearings.#,,#
【中国标准分类号】:L31
【国际标准分类号】:11_180_15
【页数】:4P.;A4
【正文语种】:德语


【英文标准名称】:StandardTestMethodforAutomatedHeithausTitrimetry
【原文标准名称】:自动HEITHAUS滴定分析法用标准试验方法
【标准号】:ASTMD6703-2007
【标准状态】:现行
【国别】:
【发布日期】:2007
【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】:D04.47
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:地沥青;自动化;质量(物质);体积测量;计量学;试验方法;测试;滴定法;容量分析
【英文主题词】:sphalt;bitumen;coke;colloidalstability;compatibility;heavyoilresidua;Asphalts;Colloidalstability;Compatibility;Heavyoilresidua;Heithaustitrimetry
【摘要】:Thistestmethodisintendedprimarilyasalaboratorydiagnostictoolforestimatingthecolloidalstabilityofasphalt,asphaltcrossblends,agedasphalt,pyrolyzedasphalt,andheavyoilresiduum.Historically,asphaltandheavyoilresiduahavebeenmodeledascolloidalsuspensions(8,9)inwhichapolar,associatedasphaltenemoiety(thedispersedphase)issuspendedinamaltenesolventmoiety(thedispersingmedium)(refertotestmethodsD3279,D4124,andD5546forfurtherdefinitionofasphaltfractionmaterials).Theextenttowhichthesetwomoietiesremaininagivenstateofpeptizationisameasureofthecompatibilityofthesuspension.Compatibilityinfluencesimportantphysicalpropertiesofthesematerials,includingrheologicalproperties,forexample,phaseangleandviscosity(10,11).Compatibilityalsoinfluencescokeformationinrefiningprocesses(4).Thistestmethodandothersimilartestmethods(7,12-15),alongwiththeclassicalHeithaustest(1,2),measurestheoverallcompatibilityofacolloidalsystembydeterminingadesignatedparameterreferredtoasthestateofpeptization,P.ThevalueofPcommonlyvariesbetween2.5and10forunmodifiedorneatasphalts.MaterialscalculatedtohavelowvaluesofParedesignatedasincompatible,whereasmaterialscalculatedtohavehighPvaluesaredesignatedascompatible.ValuesofPmaybecalculatedasafunctionoftwootherdesignatedparametersthatrelatetothepeptizabilityoftheasphaltenemoiety(theasphaltenepeptizabilityparameter,pa)andthesolventpowerofthemaltenemoiety(themaltenepeptizingpowerparameter,po).ValuesofpaandpoarecalculatedasfunctionsofthequantitiesCminandFRmax,thevaluesofwhichareobtainedfromthreeexperimentalvariables,theweightofresiduumorasphalt(Wa),thevolumeofsolvent(VS),andthevolumeoftitrantaddeduptotheflocculationpoint(VT).1.1ThistestmethoddescribesaprocedureforquantifyingthreeHeithauscompatibilityparameters(1,2)thatestimatethecolloidalstabilityofasphaltsandasphaltcrossblends(1,2),agedasphalts(3),andpyrolyzedheavyoilresiduaandasphalt(4)usingautomatedHeithaustitrimetryasastabilitydiagnostictool.1.2Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:G04
【国际标准分类号】:17_060
【页数】:9P.;A4
【正文语种】: