UNI-T UT70C Spécifications

Page34568891012141414161617181923242628303132333434353536Table of ContentsTitleOverviewUnpacking InspectionSafety InformationRules For Safe OperationI

Functional Buttons (1)Below table indicated for information about the functionalbutton operations.Button Operation PerformedMeasuringFunctionContinuit

HOLD Any rotaryswitchpositionPress HOLD to enter and exit theHold mode in any mode; theMeter beeps.Functional Buttons (2)ConductancemodePress HOLD to

No. MeaningSymbolDisplay Symbols (1) (see figure 2)(figure 2)1The Meter is in the auto range mode inwhich the Meter automatically selects therange wit

V, mVDisplay Symbols (2)12 ,k , MW: Ohm. The unit of resistance.kW: kilohm. 1 x 103 or 1000 ohms.MW: Megohm. 1 x 106 or 1,000,000ohms.Hz, kHz,MH

Measurement Ranges (1)A measurement range determines the highest value theMeter can measure. Most Meter functions have morethan one range. See "

1. Press RANGE.The Meter enters the manual range mode and turns off.Each presses of RANGE increments the range.When the highest range is reache

Measurement Operation (1)A. AC Voltage Measurement (see figure 3)WarningTo avoid harms to you or damages to the Meter fromelectric shock, please do n

(figure 4)B. DC Voltage Measurement (see figure 4)Measurement Operation (2)WarningTo avoid harms to you or damages to the Meter fromelectric shock, pl

(figure 5)Measurement Operation (3)C. DC Millivolt Measurement (see figure 5)WarningTo avoid harms to you or damages to the Meter fromelectric shock

(figure 6)Measurement Operation (4)D. Measuring Continuity, Resistance,Conductance & CapacitanceWarningTo avoid damages to the Meter or to the dev

Page373737383838393940414142434445454546Accuracy SpecificationsA. AC VoltageB. DC VoltageC. Continuity, Resistance & Conductance Tes

(figure 7)Resistance Measurement (see figure 7)Measurement Operation (5)The resistance ranges are: 800.0 , 8.000k , 80.00k ,800.0k , 8.000M

Measurement Operation (6)l The LCD displays indicating open-circuit for thetested resistor or the resistor value is higher thanthe maximum range of t

(figure 9)Measurement Operation (7)Capacitance Measurement (see figure 9)The Meter's capacitance ranges are: 1.000nF, 10.00nF,100.0nF, 1.000F, 10

Measurement Operation (8)E. Testing Diodes (see figure 10)(figure 10)WarningTo avoid possible damage to the Meter and to thedevice under test, disconn

(figure 11)Measurement Operation (9)Notel In a circuit, a good diode should still produce aforward voltage drop reading of 0.5V to 0.8V;however, the r

Measurement Operation (10)The current measurement has 2 measurement positionson the rotary switch: A and mA .The A has a 8.000A and 10.00A range, with

(figure 12)Measurement Operation (11)G. Frequency & Duty Cycle Measurement (see figure 12)Frequency MeasurementThe measurement ranges are: 1kHz, 1

Measurement Operation (12)Duty Cycle MeasurementThe duty cycle measurement range is 0.01% ~ 99.99%.To measure duty cycle:1. Set up the Meter to measur

MAX MIN recording mode applies to all measurementfunctions except at conductance measurement function.MAX MIN recording mode captures and stores thema

MAX MIN Recording Mode (2)To selectresponse timel The pre-set response time is 100ms.l Press to select 1 ms responsetime in REC mode. It is calledun

OverviewThis Operating Manual covers information on safety andcautions. Please read the relevant information carefullyand observe all the Warnings and

PEAK MAX MIN Mode (see figure 14)(figure 14)PEAK MAX MIN mode is an additional function of .Pressing to toggle between 100ms response timeand 1ms re

Operation of Hold ModeWarningTo avoid possibility of electric shock, do not useHold mode to determine if circuits are without power.The Hold mode will

Operation of Auto Hold ModeAuto Hold means you no need to press HOLD, thereadings on the LCD will be hold automatically.Conditions to enter Auto Hold

The Use of Relative Value and RelativePercentage Value ModeThe and % mode applies to all measurement functions,with auto ranging.REL mode can be

Turning on the Display BacklightWarningIn order to avoid the hazard arising from mistakenreadings in insufficient light or poor vision, pleaseuse the

Full Icons DisplayIf the Meter is turned on with any functional button beingpressed on, the LCD will display all the icons and maintainthis mode until

l Maximum Displayl Temperaturel Relative Humidityl Altitudel Battery Typel Battery Deficiencyl Data Holdingl Negative readingl Overloadingl Equipped w

Accuracy Specifications (1)Accuracy: (a% reading + b digits), guarantee for 1 year.Operating temperature: 23oC5oC.Relative humidity: <80%.Temperatu

Approximate100(0.5%+3)(0.5%+1)(2%+3)(2%+10)Accuracy Specifications (2)C. Continuity, Resistance & Conductance TestContinuity Test(800.0 )8008k80

Accuracy Specifications (3)F. DC CurrentRangeResolutionAccuracyOverloadProtection(0.3%+2)80mA800mA8A10A10 A100 A1mA10mARemark:l At 8A & 10A Range:

Unpacking InspectionOpen the package case and take out the Meter. Checkthe following items carefully to see any missing ordamaged part:In the event y

Accuracy Specifications (4)H. Frequency & Duty CycleFrequency - At mV RangeRemarks:l Input sensitivity as follows:<100kHz: 100mV rms;100kHz: 5

Maintenance (1)This section provides basic maintenance informationincluding battery and fuse replacement instruction.WarningDo not attempt to repair o

Maintenance (2)B. Testing the FusesWarningTo avoid electrical shock or personal injury, removethe test leads and any input signals before replacingthe

WarningTo avoid false readings, which could lead to possibleelectric shock or personal injury, replace the batteryas soon as the battery indicator &qu

Maintenance (4)D. Replacing the Fuses (see figure 15)WarningTo avoid electrical shock or arc blast, or personalinjury or damage to the Meter, use spec

Receiving DataTransmitting DataData Terminal ReadyGroundingData Set ReadyRequest to SendClear to SendRXTXDTRGNDDSRRTSCTS3220764523456782345678RS232C S

RS232C Serial Port (2)C. System Requirements for Installing the UT70CInterface ProgramTo use UT70C Interface Program, you need the followinghardware a

Model UT70C: OPERATING MANUAL 47

Manufacturer: UNI-TREND TECHNOLOGY(DONG GUAN)LIMITEDAddress: Dong Fang Da Dao, Bei Shan Dong Fang Industrial Development District, Hu Me

Safety InformationCAT. II: Local level, appliance, PORTABLE EQUIPMENTetc., with smaller transient voltage overvoltages thanCAT. IIICAT. III: Distribut

Rules For Safe Operation (1)WarningTo avoid possible electric shock or personal injury,and to avoid possible damage to the Meter or to theequipment un

Rules For Safe Operation (2)l Disconnect circuit power and discharge all high-voltage capacitors before testing resistance,conductance, continuity, di

International Electrical SymbolsThe Meter Structure (see figure 1)(figure 1)1 Front Case2 LCD Display3 Functional Buttons4 Rotary Switch5 Input T

mVVOFFVRotary SwitchBelow table indicated for information about the rotaryswitch positions.RotarySwitchPositionFunctionPower is turned off.AC voltage