NEBS认证测试用例.docx
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NEBS认证测试用例.docx
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NEBS认证测试用例
NEBS认证测试用例
1.EnvironmentalTest(GR-63-CORE)
1.1.Temperature,Humidity,andAltitudeCriteria
Thissectionprovidescriteriaandtestmethodsfortemperature,humidity,andaltituderobustnessofnetworkequipment.
ØThecriteriacoverthefollowing:
•Transportationandstorageenvironments
•Operatingtemperatureandhumidityenvironments
•Altitude
•Heatdissipation
•Equipmentairflow
ØEquipmentmaybetestedinthefollowingconfigurations:
•Frame-level—Afully-loadedequipmentframeorframes,orasingleequipmentshelfmorethan36inchesinheight.
•Shelf-level—Asingleequipmentshelflessthanorequalto36inchesinheight.
1.GeneralTestingRequirements
Duringtheoperationalteststheequipmentshalloperate,usingasmanyfunctionsasdeemedpractical.Forthenon-operatingtests,theequipmentshallbetestedforoperabilitybeforeandaftereachtest.
Theoperationalstateoftheequipmentshallsimulatetheconfigurationforactualserviceconditions.Thecriteriaforassessingfunctionalityshallbeincludedinawrittentestplan.Thecriteriadependontheserviceprovidedbytheequipmentbeingtested,andaredeterminedbyapplyingappropriateTelcordiagenericcriteria,or,ifnoneexists,bythesupplier'sorpurchaser’sperformancespecifications.
Alltestsshallbeconductedinathermalchambercapableofproducingthetemperatureandhumidityconditionsgiveninthetestprocedure.Foroperationaltestsonproductscooledbyforcedair,thethermalchambervolumeshouldbeatleast5timesthevolumeoftheequipmentundertest.Foroperationaltestsonproductscooledbynaturalconvection,thethermalchambervolumeshallbeatleast5timesthevolumeoftheequipmentundertest,andtheairflowneartheequipmentspaceshallnotexceed1m/second.Chamberairflowvelocitycanbeassessedpriortoinsertionofequipmentundertest.
Temperatureandhumiditysensorsshallbecalibratedfortherangesoftemperatureandhumidityexpectedduringthetest,andshallbecapableofmeasuringwithsufficientaccuracytoensurethetolerancesintheprocedurearesatisfied.
Allpowering,interfacing,andmonitoringequipmentthatisnotpartoftheequipmentbeingtestedshouldbelocatedoutsidethechamber.
2.Tolerances
Unlessotherwisespecified,thetemperatureshallbemaintainedwithin±3°C,andtherelativehumiditywithin±3%.Dwelltimedurationsspecifiedintestmethodsareminimumsandmaybeextended.
3.AmbientTemperature/RelativeHumidity
Unlessotherwisespecified,ambienttemperatureisdefinedasatemperaturebetween20°C(68°F)and30°C(86°F)andambientrelativehumidityisdefinedtobearelativehumiditybetween5%-85%.
4.TemperatureGradient
Inthethermaltestsbelow,themaximumcoolinggradientisspecifiedat30°C/hr(54°F/hr).Themaximumheatinggradientisspecifiedat96°C/hr(173°F/hr).Thermalchambersshallbecapableofachievingthisgradientoverthespecifiedtemperaturerange.
5.TestReport
Awrittentestreportshallverifythatthetestwasconductedproperlyandthattheequipmentfunctionalitywasmaintained.Thetestreportshallincludeadescriptionofthetestchamberintermsoftheappropriaterequirementsandobjectives,andshallincorporatethefollowinginformation:
•Sketchesorphotosofthetestconfiguration
•Adescriptionoftheequipmentundertestandtheserviceitprovides
•Thecriteriaforassessingfunctionality,includingtherequiredfunctionalityatboththenormalandshort-termoperatingconditionsforoperatingtemperatureandhumiditytests.
NOTE:
Foroperatingtemperatureandrelativehumiditytesting,coreorcriticalfunctionsmustbemaintainedattheshort-termoperatingconditions.Anydesignedreductioninequipmentfunctionalityattheshort-termoperatingconditionsmustbejustifiedinthetestreport.Fullequipmentfunctionalitymustself-restorewhenthetemperatureorhumidityreturntothenormalrange.
•Alltemperatures(includinginternalequipmenttemperatures),humidityconditions,andfunctionalitydata(includinganycalculations)
•Adescriptionofanyhardwareorsoftwarefailures,plusalistofallreplacementsthatweremade,ifany.
1.1.1.TransportationandStorageEnvironmentalCriteria
Duringtransportationorinstorage,equipmentmaybeexposedtoextremesinambienttemperatureandhumidity.Thecriteriainthissectionapplytoequipmentinitsnormalshippingcontainer.Aftertheequipmentisexposedtothegivenenvironment,itisreturnedtoambient,unpackagedandoperated.Conformanceisbasedontheequipment’sabilitytooperateasintendedwhenreturnedtoambientconditions.
Theequipmentdoesnotoperateduringthesetests,butappropriatefunctionalitymeasurementsshouldbemadeonequipmentbeforeandaftereachtestorsequenceoftests.Packagedequipmentshouldbeusedinthesetests.If,forsomereason,thisisnotpossible(e.g.,thepackagingisnotavailable),thesetestsmaybeconductedonunpackagedequipment,providedthatthe
•Packagingcanbereasonablyassumednottoinfluencethetestingresults,and
•Packagingwillitselfresistthetemperatureandhumiditypackagestresses.
Packagingthatincludesamoisturebarriershouldalwaysbeincludedinthehighhumidityandlowtemperatureexposureandshocktestsbecausesuchbarriersaffectproductconformanceforthesetests.
NOTE1—Testsmaybeperformedsequentiallyonasinglesampleorparallel.
NOTE2—Ifthelikelihoodofnonconformancefromagiventestissmall,asequenceofseveraltestsmaybeperformedbeforetheequipmentoperationaltestisperformed.However,ifanonconformanceoccurs,thetestswillhavetoberepeatedtodeterminewhichenvironmentcausedthenonconformance.
NOTE3—Iftestingsequentiallyonasinglesample,thesuggestedtestsequenceislowtemperatureexposureandthermalshock,followedbyhighhumidityexposure,andfinallyhigh-temperatureexposureandthermalshock.Adequatetimeforproductrecoveryaftertheshocksshouldbeallowed.Thiswillpermittheequipment’stemperaturetomoderate,andanyresultingcondensationtoevaporate,beforeperformingtheequipment’sfunctionalitytestorcontinuingthepackagetestsequence.
NOTE4—Fortransportationandstoragemethods,testsampleinsertionintoachamberkeptatthespecifiedextremeenvironmentsispermittedifamanufactureragreestothismethod.Theexposuredurationshallbeextendedtoincludetheomittedrampingtimeprovidedinthisdocument.
1.1.1.1.Low-TemperatureExposureandThermalShock
ThepackagedequipmentshallnotsustainanydamageordeteriorateinfunctionalperformanceafterithasbeenexposedtotheenvironmentdescribedinTable1-1.
Table1-1Low-TemperatureExposureandThermalShock
TestSequence:
1)Makeinitialequipmentfunctionalitytestatambienttemperatureandhumiditylevel.
2)Packagetheequipmentandplaceitintothetestchamber.
(Donotoperatetheequipmentduringthetest.)
3)Monitorthechambertemperaturecontinuouslyduringthetest.
4)Decreasethechambertemperature,atarateofabout30°C/hr(54°F/hr)to-40°C(-40°F).
5)Maintainatemperature-40°C(-40°F)foraminimumof72hours.
6)Administerthethermalshockbyincreasingthechambertemperature(orremovingtheequipmentfromthechamber)from-40°C(-40°F)toambientinlessthan5minutes.(Useappropriatepersonalprotectiveequipmentwhenhandlingthepackage.)
7)Performapost-testequipmentfunctionalitycheckaftertheequipmenthasrecoveredatambienttemperatureandhumidity.
Figure1-1Low-TemperatureExposureandThermalShock
1.1.1.2.HighRelativeHumidityExposure
ThepackagedequipmentshallnotsustainanydamageordeteriorateinfunctionalperformanceafterithasbeenexposedtotheenvironmentdescribedinTable1-2.
Table1-2HighRelativeHumidityExposure
TestSequence:
1)Makeinitialequipmentfunctionalitytestatambienttemperatureandhumiditylevel.
2)Packagetheequipmentandplaceitintothetestchamberat23°C(73°F)and50%RH.
(Donotoperatetheequipmentduringthetest.)
3)MonitorthechambertemperatureandRHcontinuouslyduringthetest.
4)Increasethechambertemperature,atarateof30°C/hr(54°F/hr)to40°C(104°F).
5)Whileholdingthechamberat40°C(104°F),transitionthechamber’sRHto93%.ThisRHshallbeachievedin<2hours.
6)Maintainatemperature40°C(104°F)andaRHof93%foratleast96hours.
7)Whileholdingthechamberat40°C(104°F),transitionthechamber’sRHto50%.ThisRHshallbeachievedin<2hours.
8)Transitionthechamberto23°C(73°F)atarateof30°C/hr(54°F/hr)whilemaintaining50%RH.
9)Performapost-testequipmentfunctionalitycheckaftertheequipmenthasrecoveredatambienttemperatureandhumidity.
Figure1-2HighRelativeHumidityExposure
1.1.1.3.High-TemperatureExposureandThermalShock
ThepackagedequipmentshallnotsustainanydamageordeteriorateinfunctionalperformanceafterithasbeenexposedtotheenvironmentdescribedinTable1-3.
Table1-3High-TemperatureExposureandThermalShock
TestSequence:
1)Makeinitialequipmentfunctionalitytestatambienttemperatureandhumiditylevel.
2)Packagetheequipmentandplaceitintothetestchamber.
(Donotoperatetheequipmentduringthetest.)
3)Monitorthechambertemperaturecontinuouslyduringthetest.
4)Increasethechambertemperature,atarateof30°C/hr(54°F/hr)to70°C(158°F).
5)Maintainatemperature70°C(158°F)foraminimumof72hours.
6)Administerthethermalshockbydecreasingthechambertemperature(orremovingtheequipmentfromthechamber)from70°C(158°F)toambientinlessthan5minutes.(Useappropriatepersonalprotectiveequi
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