CA250_安装调试说明书手册

EXTECHUser's Guide Model CA250INSTRUMENTS400A AC/DC Current Clamp-on MultiMeter AdaptorIntroductionCurrent MeasurementsCongratulations on your purchase ofNOTE:This device has a 30-minute automatic shut-off featurethe Extech CA250 400 Amp AC/DC1.Set the DMM range to AC mV when measuring AC amps and DCClamp-On MultiMeter Adaptor.WithmV when measuring DC amps or to the lowest voltage range.this dlamp adaptor,a current can be2.Connect the RED test lead to the DMM+'Voltage terminal andmeasured by simply dlamping aroundthe BLACK lead to the COM terminal.a single conductor.The adaptor3.Set the adaptor to the 40A (AC or DC)or the 400A(AC or DC)outputs an mV signal that isrange.proportional to the measured current4.and displayed on a DMM.Careful use of this device will provide years ofPress the Jaw Trigger to open the jaw and damp around a singleconductor.reliable service.The unit will output an AC or DC voltage proportional to theSpecificationsmeasured current.(40A range:10mV/A,400A range:1mV/A)6.Read the voltage on the DMM display and interpret asMeasurement Ranges0 to 40 Amps AC/DCcumrent.(direct mV to A on the 400A range,divide by 10 on the0 to 400 Amps AC/DC40A range)Adaptor Output10mV/Amp on the 0 to 40A range1mV/Amp on the 0 to 400A range1.Read mVFrequency range50/60Hz2.Set to AC or DC mVEN61010-1 and IEC61010-1 2nd Edition (2001)3.Voltage InputSafetyto Category Ill 600V and Category IV 300V;4.NCV detectorPollution Degree 2 in accordance with IEC 6645.NCVindicatorindoor use.6.DC Zero adjustStandardsCEDC ZeroAccuracy0to40A±(2.5%+0.1A)A hysteresis voltage may appear when the damp is set to the DC0 to 400A±(2.8%+0.5A)position.With no conductor in the jaw,adjust the DC Zero adjust untilJaw size30mm(1.2the DMM display indicates zero.If the voltage is beyond the range ofOperating Conditions0to50℃(32to122F)<70%RHthe zero adjust,snap the jaw open and shut several times to clear theStorage Conditions-20to70℃(4to158F)<80%RHhysteresis.Set DMM to DC mV range.Note:Verify the zero or re-zero the unit prior to all DC currentBattery2-1.5V "AAA"measurements and range changes.Dimensions/Weight146x60X32mm(5.8X2.3X1.3:Note:DC current measurements are polarity sensitive.Reverse the226g(8oz)conductor direction in the jaw to change the polarity.SafetyNote:Do not apply voltage to the clamp adaptor's test leadsNote:Clamp a single conductor only,do not clamp the hot and neutralSafety Symbolssimultaneously.This symbol,adjacent to another symbol or terminal,indicates the user must refer to the manual for furtherinfomation.This symbol indicates that double insulation is used.WARNING:This indicates that a potentially hazardous condition which,if not avoided,could result in death or serious injury.Note:The clamp jaws must be fully closed for proper measurementsSafety PrecautionsOn large conductors or line splitters,make sure there is no gap1.WARNING:Improper use of this meter can cause damage,shock,between the upper and lower jaw.injury or death.Read and understand this manual b