© 2020 HIOKI E.E. CORPORATION A_AP_CT0001E01 Industry: Automobile, ECU, Electrical equipment; Category: R&D, TesKng AutomoKve Electrical Equipment and ECU Current Measurement MulK-range Current Probe Capable of Measuring from 1 mA to 50 A Products used • CURRENT PROBE: CT6710, CT6711 (100 μA res., DC to 50 MHz, 120 MHz) • MEMORY HiCORDER: MR6000 ※Main unit cannot operate alone. You must install one or more opKonal input models in the unit. • SSD UNIT: U8332 • 4ch ANALOG UNIT: U8978 (DC to 2 MHz) • PROBE POWER UNIT: Z5021 Dark currents Standby currents ECU control signals Relay drive currents Relay flyback currents Motor inrush currents (Power windows) (Power seats) Current Tes.ng of Automobiles: In the development of automoKve electrical control systems, it is important to measure and validate a diverse array of current levels among components such as: • Drive current of various motors in the order of several amperes • Inrush current, for example at motor start, in the order of several tens of amperes • Minute control signals of about 1 mA • Standby current The need to measure such a wide range, from micro standby currents to inrush currents that can reach tens of amperes tradiKonally necessitate the use of separate sensors equipped with the appropriate range so that resoluKon and accuracy are not sacrificed. Using a higher range current sensor to measure low standby current will reveal no meaningful result, while sensors with a low range will not be able to handle high currents safely. A Solu.on in 3-Range Hioki Current Sensors: Hioki provides a soluKon for this parKcular applicaKon with the CT6710 (50MHz bandwidth) and CT6711 (120MHz bandwidth) current probes, both of which offer three separate ranges to an expansive range of measurements in a single unit. In the 30 A range, inrush current of up to 50 A peak can be measured, and in the 0.5 A range, 1 mA current can be accurately observed without concern of the signal being buried in noise - all while maintaining ±3.0% accuracy in all 3 ranges. Measurement safety is a criKcal issue especially when high currents are present, and this is especially true for the electrical vehicle development environment. The CT6710 and CT6711 improve work efficiency and take the guess-work out of selecKng the right range by offering a built-in funcKon that protects against excessive current input. With these sensors, if you accidentally measure a current beyond the set range (0.5 A or 5 A), the sensors are designed not to fail. Besides motor current, Engine Control Units (ECU) that output a large number of signals also need to be measured and verified for their ability to communicate with one another to ensure the proper operaKon of instrumentaKon and other automoKve components. This can easily be achieved with high-speed data acquisiKon equipment such as a Memory HiCorder. CT6710, CT6711 All informaKon correct as of February 2020. All specificaKons are subject to change without noKce. MR6000

Automotive Electrical Equipment and ECU Current Measurement

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Page 1: Automotive Electrical Equipment and ECU Current Measurement

Industry:Automobile,ECU,Electricalequipment;Category:R&D,TesKng

AutomoKveElectricalEquipmentandECUCurrentMeasurementMulK-rangeCurrentProbeCapableofMeasuringfrom1mAto50A

Productsused•  CURRENTPROBE:CT6710,CT6711(100μAres.,DCto50MHz,120MHz)•  MEMORYHiCORDER:MR6000※Mainunitcannotoperatealone.YoumustinstalloneormoreopKonalinputmodelsintheunit.•  SSDUNIT:U8332•  4chANALOGUNIT:U8978(DCto2MHz)•  PROBEPOWERUNIT:Z5021

DarkcurrentsStandbycurrentsECUcontrolsignalsRelaydrivecurrents

RelayflybackcurrentsMotorinrushcurrents

(Powerwindows)(Powerseats)

CurrentTes.ngofAutomobiles:InthedevelopmentofautomoKveelectricalcontrolsystems,itisimportanttomeasureandvalidateadiversearrayofcurrentlevelsamongcomponentssuchas:•Drivecurrentofvariousmotorsintheorderofseveralamperes•Inrushcurrent,forexampleatmotorstart,intheorderofseveraltensofamperes•Minutecontrolsignalsofabout1mA•Standbycurrent

Theneedtomeasuresuchawiderange,frommicrostandbycurrentstoinrushcurrentsthatcanreachtensofamperestradiKonallynecessitatetheuseofseparatesensorsequippedwiththeappropriaterangesothatresoluKonandaccuracyarenotsacrificed.Usingahigherrangecurrentsensortomeasurelowstandbycurrentwillrevealnomeaningfulresult,whilesensorswithalowrangewillnotbeabletohandlehighcurrentssafely.

ASolu.onin3-RangeHiokiCurrentSensors:HiokiprovidesasoluKonforthisparKcularapplicaKonwiththeCT6710(50MHzbandwidth)andCT6711(120MHzbandwidth)currentprobes,bothofwhichofferthreeseparaterangestoanexpansiverangeofmeasurementsinasingleunit.Inthe30Arange,inrushcurrentofupto50Apeakcanbemeasured,andinthe0.5Arange,1mAcurrentcanbeaccuratelyobservedwithoutconcernofthesignalbeingburiedinnoise-allwhilemaintaining±3.0%accuracyinall3ranges.

MeasurementsafetyisacriKcalissueespeciallywhenhighcurrentsarepresent,andthisisespeciallytruefortheelectricalvehicledevelopmentenvironment.TheCT6710andCT6711improveworkefficiencyandtaketheguess-workoutofselecKngtherightrangebyofferingabuilt-infuncKonthatprotectsagainstexcessivecurrentinput.Withthesesensors,ifyouaccidentallymeasureacurrentbeyondthesetrange(0.5Aor5A),thesensorsaredesignednottofail.

Besidesmotorcurrent,EngineControlUnits(ECU)thatoutputalargenumberofsignalsalsoneedtobemeasuredandverifiedfortheirabilitytocommunicatewithoneanothertoensuretheproperoperaKonofinstrumentaKonandotherautomoKvecomponents.Thiscaneasilybeachievedwithhigh-speeddataacquisiKonequipmentsuchasaMemoryHiCorder.

CT6710,CT6711

AllinformaKoncorrectasofFebruary2020.AllspecificaKonsaresubjecttochangewithoutnoKce.

MR6000