UNI-T UT805 Specifications

Model UT805OPERATING MANUAL

81.2.3.4.5.6.7.8.9.Model UT805: OPERATING MANUAL1 2 3 456789101112The Meter StructureA. Front Panel (see figure 1)VFD DisplayPrimary Functional Button

910.11.12.Model UT805: OPERATING MANUALCAL Button: Calibrate the accuracy of Voltage,Current and ResistanceSecondary Functional Buttons: Different sid

101.2.3.4.5.6.7.8.Model UT805: OPERATING MANUAL1 2 3 4 5678B. Rear Panel (see figure 2)HI Input Terminal: 4-wire configuration to measure resistanc

11Model UT805: OPERATING MANUALFunctional ButtonsThe pushbuttons on the front panel select the Meter functions and operations. Below table indicated

12Model UT805: OPERATING MANUALButtonAC Current MeasurementIt is used to measure AC Voltage or Current with DC deviation:It is a calibration button:Pr

13Model UT805: OPERATING MANUALMAX MINSTO andRCLHOLDButtonPress MAX MIN to select the maximum and minimum value.HOLD has two features:1. Data Holding2

14Model UT805: OPERATING MANUAL1 2 3 4 5 6 7 8 9 10 11121314151617181920STORCLAUTOHOLDAC+DC TrueRMS MAX MIN AVGSmSkHzmVAnFMK WHzDisplay Symbols (se

15Model UT805: OPERATING MANUALNumber Symbol MeaningIndicator for high voltageData hold is activeIndicator for AC voltage or currentIndicator for AC A

16Model UT805: OPERATING MANUALNumber Symbol Meaning1213kHznFµFmFmAAmVVkMThe unit of frequency of AC measurement: Kilohertz (shown in the secondary di

17Model UT805: OPERATING MANUALNumber Symbol Meaning14151617181920Relative mode is onThe continuity buzzer is on.Primary DisplayIndicates negative rea

18To measure DC voltage, connect the Meter as follows:1.2.Model UT805: OPERATING MANUALCOMRLDCVMeasurement OperationIf you have not done so, plug the

193.Model UT805: OPERATING MANUALNoteWhen the Meter is not zero in manual range mode,you could short circuit the test lead and press RELto zeroing to

20To measure AC voltage, connect the Meter as follows:1.2.Model UT805: OPERATING MANUALACVCOMRLB. AC Voltage Measurement (See figure 5) Warnin

213.4.Model UT805: OPERATING MANUALNoteWhen the input terminal is short circuit, it is allowedto have maximum 500 digits of reading which doesnot affe

22To measure current, connect the Meter as follows:1.2.Model UT805: OPERATING MANUALCOMRLDCICOMRLACIC. DC or AC Current Measurement (see figure 6)

233.4.5.6.7.Model UT805: OPERATING MANUALNoteIf the value of current to be measured is unknown,use the maximum measurement position, and reducethe ran

241.2.Model UT805: OPERATING MANUAL WarningTo avoid damages to the Meter or to the devices undertest, disconnect circuit power and discharge al

253.4.1.2.3.4.5.6.Model UT805: OPERATING MANUALRxRLL0HITo obtain more accurate readings, you could short-circuit the test lead and press REL to dis

26Model UT805: OPERATING MANUALNoteWhen measuring high resistance (>1M ), it is normalto take several seconds to obtain a stable reading.In order t

271.2.3.Model UT805: OPERATING MANUALCOME. Testing Diodes (See figure 9) WarningTo avoid possible damage to the Meter and to thedevice under te

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284.Model UT805: OPERATING MANUALon the component’s anode and place the black testlead on the component’s cathode.The measured value shows on the prim

29To test for continuity, connect the Meter as below:1.2.3.Model UT805: OPERATING MANUALCOMRxF. Testing for Continuity (See figure 10) WarningT

30Model UT805: OPERATING MANUALNoteOpen circuit voltage around 1.2V.The primary display shows OL indicating the testedcircuit is open.When continuity

31To measure capacitance, connect the Meter as follows:1.2.3.Model UT805: OPERATING MANUALCOMG. Capacitance Measurement (See figure 11) Warning

324.Model UT805: OPERATING MANUALNoteIf the tested capacitance has polarity, connect thered test lead to the capacitor’s positive and the blacktest le

331.2.3.Model UT805: OPERATING MANUALCOMHzHzH. Frequency Measurement (see figure 12) WarningTo avoid harms to you, please do not attempt to inp

34Model UT805: OPERATING MANUALNoteWhen making frequency measurement, it must complywith the following scope (a) requirement:When 10Hz ~ 1Mz : 150mV

35Model UT805: OPERATING MANUALSelecting a Measurement Range ( , AUTO and Button)The Meter is default at DC Voltage 2V auto rangingmeasurement mode

36Model UT805: OPERATING MANUALThe Use of Relative Value ModeRelative Mode applies to all functions except continuity,diode and frequency measurements

37Model UT805: OPERATING MANUALMAX MIN ModeMAX MIN mode applies only to DCV, ACV, ACV andACI with DC deviation, and resistance. Press MAXMIN when the

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38Model UT805: OPERATING MANUALThe Use of STO and RCL ButtonSTO ButtonPress STO to step through 7 different storage speedincluding r=0, r=1, r=2, r=3,

39Model UT805: OPERATING MANUALOperation of Hold ModeThe Hold mode allows you to take a measurement andhold that measurement on the display. This fea

40Model UT805: OPERATING MANUALIcon Display: Equipped with functions and electrical unit symbol icon display.Polarity Display: AutoOverloadin

41Model UT805: OPERATING MANUALAccuracy SpecificationsAccuracy: (a% reading + b digits), guarantee for 1 year. Operating temperature: 230C 50C.Rel

42Model UT805: OPERATING MANUALB. AC Voltage (True RMS)Remarks:Overload Protection: 1000V DC or 750V ACInput Impedance:10MAC+DC Tolerance Limit: Same

43Model UT805: OPERATING MANUALRange Measurement Scope Resolution AccuracyC. DC CurrentRemarks:Overload Protection: At mA Range: Fuse 315mA, 250V,

44Model UT805: OPERATING MANUALD. AC Current (Frequency range: 40Hz~5kHz)Remarks:Overload Protection:At mA Range:Fuse 315mA, 250V, fast type, 5x20mm

45Model UT805: OPERATING MANUALE. ResistanceRemarks:Overload Protection : 1000V DC or 750V ACOpen Circuit Voltage:Around 2VllRange Measurement Scope

46Model UT805: OPERATING MANUALF. Diode TestRange Measurement Scope Resolution Overload Protection Remarks0.00~6.00V 10mV 250VpOpen circuit voltage ap

47Model UT805: OPERATING MANUALH. CapacitanceRemarks:Overload Protection: 250VplRange Measurement Scope Resolution Accuracy6nF60nF600nF6 F60 F600 F6m

3Model UT805: OPERATING MANUALOverviewThis Operating Manual covers information on safetyand cautions. Please read the relevant informationcarefully an

48Model UT805: OPERATING MANUALRange Measurement Scope Resolution AccuracyI. FrequencyRemarks:llOverload Protection: 250VpInput scope (a): (DC electr

49Model UT805: OPERATING MANUALA. DC Voltage (Calibrate both positive and negative polarity)CALIBRATION PROCEDURElllThe calibration must be done i

50Model UT805: OPERATING MANUALB. AC Voltage(750V range: frequency 1kHz, all other ranges: frequency 20kHz)200mV:2V :20V :200V :Input 1

51Model UT805: OPERATING MANUALC. DC Current (Calibrate both positive and negative polarity)2mA :200mA :10A :Press REL to display “0”, i

52Model UT805: OPERATING MANUALE. Resistance F. AC Voltage with DC deviation (AC+DC)1. Press ACV button2. Press AC+DC button3. Follow the above “B. AC

53Model UT805: OPERATING MANUALSUMMARY OF ERROR CODESIf the Meter is failed to operate properly, an error code is displayed in the primary display. E

54Model UT805: OPERATING MANUALMaintenanceThis section provides basic maintenance informationincluding general service and fuse replacementinstruction

551.2.Model UT805: OPERATING MANUALB. Replacing the Fuses (see figure 13) WarningTo avoid electrical shock or arc blast, or personalinjury or d

563.Model UT805: OPERATING MANUALthe fuse from its bracket. Then install thereplacement fuse.Install ONLY replacement fuses with the identicaltype an

57Model UT805: OPERATING MANUALRS232C and USB Serial PortSystem Requirements for Installing the UT805Interface ProgramlllllllAn IBM PC or equivalent c

4Item Description QtyModel UT805: OPERATING MANUALUnpacking InspectionCarefully remove the Meter from its shipping container and check the following i

58Model UT805: OPERATING MANUALRS232C Serial PortA. Connecting between the Meter and computer (see figure 14)B. RS232C Port CableD-sub9 Pin MaleCom

59Model UT805: OPERATING MANUALSerial port output 25 bits. Each bit is an alphabet, below table explains the meaning of each alphabet:Number12345$Sta

60Model UT805: OPERATING MANUALThe Meter adopts a single large alphabet command,each command is sent out twice as below table:When the Meter receives

61Model UT805: OPERATING MANUALUSB Serial PortA. Connecting between the Meter and computer (see figure 15)B. Setting of USB Serial PortsInstall th

62Model UT805: OPERATING MANUALThis operating manual is subject to change without notice. Copyright 2005 Uni-Trend International Limited.All rights

5Model UT805: OPERATING MANUALSafety InformationThis Meter complies with the standards IEC61010: inpollution degree 2, overvoltage category (CAT. I 10

6Model UT805: OPERATING MANUALEnsure the Meter is at right measurement positionrange. Disconnect the connection between the testlead and the circuit

7Model UT805: OPERATING MANUALInternational Electrical SymbolsAC or DCGroundingDouble InsulatedWarning. Refer to the Operating ManualHigh VoltageCont