Pyro2(2750D)_Instr&Class_29DEC06_JE-高温测量-仪器设备

Instrumentation1InstrumentsInstrumentsreceiveelectricalcommunicationfromsensorsandconvertelectromotiveforce(emf)producedbysensorsintoauseableformat.Instrumentstranslatesensormillivoltage(emf)intotemperaturevaluesthatcanbeusedincontrolling,monitoring,andrecordingforthepurposeofestablishing,maintaining,anddocumentingprocessparameters.Asaheattreater,whatisyourprimaryinterestwithworkinginstruments?2InstrumentationTypes–AMS2750DThreecategoriesofinstruments.StandardInstruments.TestInstruments.Control,Monitoring,RecordingInstruments.3InstrumentationTypes–AMS2750DStandardInstruments.ReferenceStandard.PrimaryStandard.SecondaryStandard.TestInstruments.FieldTestInstrument.Controlling,Monitoring,RecordingInstruments.Digital.Electromechanical.MechanicalorThermalElement.4InstrumentationTypes–AMS2750DStandardInstruments.ReferenceStandard.PrimaryStandard.SecondaryStandard.TestInstruments.FieldTestInstrument.Controlling,Monitoring,RecordingInstruments.Digital.Electromechanical.MechanicalorThermalElement.5AMS2750D,Page32StandardInstrumentsUsedFor6InstrumentationTypes–AMS2750DStandardInstruments.ReferenceStandard.PrimaryStandard.SecondaryStandard.TestInstruments.FieldTestInstrument.Controlling,Monitoring,RecordingInstruments.Digital.Electromechanical.MechanicalorThermalElement.7FieldTestInstrumentAMS2750D,paragraph8.2.19.“FieldTestInstrument”:Aninstrumentthatisportable,thatmeetstherequirementsofTable3,hascalibrationtraceabletosecondaryequipmentorbetterandisusedtoconducton-sitetestsofthermalprocessingequipment.8AMS2750D,Page32TestInstrumentUsedFor9InstrumentationTypes–AMS2750DStandardInstruments.ReferenceStandard.PrimaryStandard.SecondaryStandard.TestInstruments.FieldTestInstrument.Controlling,Monitoring,RecordingInstruments.Digital.Electromechanical.MechanicalorThermalElement.10ControlInstrumentAMS2750D,paragraph8.2.8.“ControlInstrument”:Aninstrumentconnectedtoasensorandusedtocontrolthetemperatureofprocessequipment(includingquenchbathsandrefrigerationequipment).Theinstrumentmayormaynotalsorecordtemperature.11MonitoringInstrumentAMS2750D,paragraph8.2.29.“MonitoringInstrument”:Aninstrumentconnectedtoacontrolling,monitoring,loadorrecordingsensorthatindicatesprocessequipmenttemperature.Examplesareanindicatingdevice,chartrecorder,electronicdatarecorderoradataacquisitionsystem.12RecordingInstrumentAMS2750D,paragraph8.2.44.“RecordingInstrument”:Aninstrumentconnectedtoacontrolling,monitoring,loadorrecordingsensorthatindicatesprocessequipmenttemperaturedataandgeneratesapermanentprocessrecord.Examplesareachartrecorder,electronicdatarecorderoradataacquisitionsystem.13AMS2750D,Page3214AMS2750D,Page3315Control,Monitor,RecordInstrumentsInsummary,eachcontrolling,monitoring,andrecordinginstrumentshall:Becalibrated.Performatleastoneofthefollowingfunctions:Control.Monitor.Record.Betestedforsensitivity.16Control,Monitor,RecordInstrumentsInsummary,eachcontrolling,monitoring,andrecordinginstrumentshall:Becalibrated.Performatleastoneofthefollowingfunctions:Control.Monitor.Record.Betestedforsensitivity.17Control,Monitor,RecordInstrumentsAMS2750D,Table3.Calibrationmustbeperformedagainstatestinstrument.Frequencyminimum.Basedonthefurnaceclassandtypeofinstrument(digitaloranalog).Calibrationaccuracy.Digital:±2°F(±1.1°C)Analog:±2°F(±1.1°C)or±0.3%ofthemaximumsurveytemperatureoftheequipment,whicheverisgreater.MechanicalorThermalElement:±5°F(±3°C),applicabletorefrigerationandquenchbathsonly.18Control,Monitor,RecordInstrumentsInsummary,eachcontrolling,monitoring,andrecordinginstrumentshall:Becalibrated.Performatleastoneofthefollowingfunctions:Control.Monitor.Record.Betestedforsensitivity.19Control,Monitor,RecordInstrumentsOnedevicecanfulfillallfunctions.Control.Monitor.Record.Alternatively,uptothreeseparatedevices.Connectedtothesamesensor.Connectedtomorethanonesensor(eachzone).20Control,Monitor,RecordInstrumentsInsummary,eachcontrolling,monitoring,andrecordinginstrumentshall:Becalibrated.Performatleastoneofthefollowingfunctions:Control.Monitor.Record.Betestedforsensitivity.21Control,Monitor,RecordInstrumentsSensitivity,AMS2750D,para8.2.55.“Sensitivity”:Thetemperaturechangeintheinputthatisrequiredtoactivateachange,eitherupscaleordownscaleontheinstrumentation.Itisnormallyone-halfthenumericalvalueofthedeadband,suchas:asensitivityof1°F(0.6°C)isequivalenttoadeadbandof2°F(1.1°C).22Caution:Thepurposeofthisgraphistoassistindefiningdeadband.ThevaluesuseddonotrepresentAMS2750Drequirements.23AMS2750D,Page8/924AMS2750D,Page3425ResolutionforClass2FurnaceDegreesperinchChartincrement26AMS2750D,Page3427ChartSpeedChartrecorder(circularorstrip).Speed(s)shallbeverifiedannually.Shallbeaccuratewithin+/-3minutes/hour.Onemethod:1)Markthechartandnotethetime(pressprintfunctiononsomerecorders).Note:Acalibratedstopwatchisnotrequired.2)Allowthecharttocontinuetofeedforareasonabletime(atleast20mm).3)Markchartandnotetime(orpressprint).4)Measuredistancebetweenthemarks.5)Calculatespeed;distance/time.28AMS2750D,Page929Control,Monitor,RecordInstrumentsEmphasisitems.Atleastonerecor