UNI-T UT90A Especificações

Table of ContentsTitle PageOverviewUnpacking InspectionSafety InformationRules For Safe OperationInternational

10AC Current Measurement Range from0.1µA to 10AModel UT90A: OPERATING MANUALµ

11Functional ButtonsBelow table indicated for information about the functionalbutton operations.AC voltage measurement.Turn the power o

12Display Symbols(1) (see figure 2)( figure 2)No. Symbol Meaning1The battery is low. Warning: To avoid false readings,which

Display Symbols(2) (see figure 2)Ω: Ohm. The unit of resistance.kΩ: kilohm.1 x 103 or 1000 ohms.MΩ: Megaohm. 1 x 106 or 1,000,000 ohms.µA,

14Measurement Operation(1)A.DC Voltage Measurement (see figure 3)red black( figure 3)WarningTo avoid harms to you or damages to the Meter fromelec

15Measurement Operation(2)l The LCD displays “1” indicating the existing selected range is overloaded, it is required to select a higher r

16Measurement Operation(3)B.AC Voltage Measurement (see figure 3)red black( figure 3)WarningTo avoid harms to you or damages to the Meter fromelec

17Measurement Operation(4)l The LCD displays “1” indicating the existing selected range is overloaded, it is required to select a higher r

18The measurement ranges of DC current are: 200.0µA,2.000mA, 20.00mA, 200.0mA and 10.00A.To measure current, do the following:1. Turn off power to th

19D. AC Current Measurement (see figure 4)WarningNever attempt an in-circuit current measurementwhere the voltage between terminals and ground isgrea

Table of ContentsTitle PageOverviewUnpacking InspectionSafety InformationRules For Safe OperationInternational

20Measurement Operation(7)E. Measuring Resistance (see figure 5)WarningTo avoid damages to the Meter or to the devicesunder test, disconnect circuit p

21The resistance ranges are: 200.0 , 2.000k , 20.00k ,200.0k, 2.000M and 20.00M .To measure resistance, connect the Meter as follows:1. Insert the r

22F.Testing Diodes & ContinuityWarningTo avoid possible damage to the Meter and to thedevice under test, disconnect circuit power anddischarge all

23Notel In a circuit, a good diode should still produce a forward voltage drop reading of 0.5V to 0.8V; however, the reverse voltage drop

24To test for continuity, connect the Meter as below:1. Insert the red test lead into the VΩ terminal and the black test lead into the COM

25Measurement Operation(12)WarningTo avoid damages to the built-In fuse and the Meter,measure the specified battery type and power supplyonly.To carry

26: 315mA, 250V, fast type, 5x20mm: 10A, 250V, fast type, 5x20mmModel UT90A: OPERATING MANUALGeneral Specifications(1)l Maximum Voltage between

27General Specifications(2)l Safety/Compliances : IEC61010: CAT. II 1000V, CAT. III 600V overvoltage

28Accuracy Specification(1)Accuracy: (a% reading + b digits),guarantee for 1 year.Operating temperature:18oC~28oC.Relative humidity:<75%RH.Tempera

29Accuracy Specification(2)Remarks:l At 10A Range: For continuous measurement 10 seconds and interval time between 2 measurement greater than

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

30Accuracy Specification(3)E. ResistanceRange ResolutionOverloadProtectionAccuracy200Ω2kΩ20kΩ200kΩ2MΩ20MΩ0.1Ω1Ω10Ω100Ω1kΩ10kΩ(0.8%+3) +short-circuit t

31Maintenance(1)This section provides basic maintenance informationincluding battery and fuse replacement instruction.WarningDo not attempt to repair

32Maintenance(2)WarningTo avoid electrical shock or arc blast, or personalinjury or damage to the Meter, use specified fusesONLY in accordance with th

333. Remove the 3 screws from the case bottom, and separate the case top from the case bottom.4. Remove the battery from the battery connector.5

34Model UT90A: OPERATING MANUAL

35Model UT90A: OPERATING MANUAL

36Copyright 2001 Uni-Trend International Limited.All rights reserved.Manufacturer: UNI-TREND TECHNOLOGY(DONG GUAN)LIMITEDAddress: Dong Fang Da Dao, Be

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

Safety InformationThis Meter complies with standards IEC61010: in pollutiondegree 2, overvoltage category (CAT. II 1000V, CAT. III600V) and double ins

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 When servicing the Meter, use only the same model number or identical electrical specifications replacement p

International Electrical SymbolsAC (Alternating Current).DC (Direct Current).AC or DC.Grounding.Double Insulated.Deficiency of Built-In Battery.Contin

The Meter Structure (see figure 1)9( figure 1)1 LCD Display.2 Hold Button.3 Rotary Switch.4 Input Terminals.5 Power Button.Model UT90A: OPER