UT231 Ó¢ÎÄ·âÃæ2 25 26 26 26 27 27 27 28 28 29 30 31 31 32 32 33 33 34 model ut231: operating manual table of contents title page

P/N: 41451518

UT231

Digital Power Clamp Meter

Operating Manual

Model UT231OPERATING MANUAL

TABLE OF CONTENTSTITLE PAGE

Model UT231: OPERATING MANUAL

1

OverviewUnpacking InspectionSafety InformationRules For Safe OperationInternational Electrical SymbolsThe Meter Structure A. The Meter Front Structure B. The Meter Back and Bottom StructureFunctional ButtonsDisplay SymbolsMeasurement Operation A. AC Voltage + Frequency Measurement B. AC Current + AC Voltage Measurement C. Active Power + Phase Angle Measurement D. Apparent Power + Reactive Power Measurement E. Power Factor + Phase Angle Measurement F. Active Energy + Time Measurement G. Temperature + Temperature MeasurementTrue RMS Measurement and Average Value Measurement

33446668811131315161819212324

2

252626262727272828293031313232333334


TABLE OF CONTENTSTITLE PAGE

Three Phases Four Wires and Three Phases Three WiresMeasurement MethodSpecifications A. General Specifications B. Environmental RequirementsAccuracy Specifications A. AC Voltage B. Frequency C. AC Current D. Active Power E. Apparent Power F. Reactive Power G. Power Factor H. Phase Angle I. Active Energy J. TemperatureMaintenance A. General Service B. Replacing the Battery

3


This Operating Manual covers information on safetyand cautions. Please read the relevant informationcarefully and observe all the Warnings and Notesstrictly.

To avoid electric shock or personal injury, read the“Safety Information” and “Rules for Safe Operation”carefully before using the Meter.

Model UT231 is a digital power clamp meter (hereafterreferred to as “the Meter”) is a handheld intelligentpower meter which has both the features of digitalcurrent meter and also power measurement meter.

The Meter can measure Voltage, Current, Active Power,Apparent Power, Reactive Power, Power Factor, PhaseAngle, Frequency, Active Energy, Temperature and etc.

Warning

Open the package case and take out the Meter. Checkthe following items carefully to see any missing ordamaged part:

Unpacking Inspection

Item12345678

DescriptionEnglish Operating ManualTest LeadAlligator ClipPoint Contact Temperature ProbeUSB Interface CableSoftwareTool Box1.5V Battery (LR6)

Qty1 piece1 pair1 pair1 piece1 piece1 piece1 piece4 pieces

In the event you find any missing or damage, pleasecontact your dealer immediately.

Overview

4


Safety Information

This Meter complies with the standards IEC61010: inpollution degree 2, overvoltage category (CAT. III 600V,CAT IV 300V) and double insulation.

CAT. III: Distribution level, fixed installation, with smallertransient overvoltages than CAT. IV.CAT IV: Primary supply level, overhead lines, cablesystems.

Use the Meter only as specified in this operating manual,otherwise the protection provided by the Meter may beimpaired.

In this manual, a Warning identifies conditions andactions that pose hazards to the user, or may damagethe Meter or the equipment under test.

A Note identifies the information that user should payattention to.

International electrical symbols used on the Meter andin this Operating Manual are explained on page 6.

Rules For Safe Operation

To avoid possible electric shock or personal injury,and to avoid possible damage to the Meter or tothe equipment under test, adhere to the followingrules:

Warning

Before using the Meter inspect the case. Do notuse the Meter if it is damaged or the case (orpart of the case) is removed. Look for cracksor missing plastic. Pay attention to the insulationaround the connectors.Inspect the test leads for damaged insulation orexposed metal. Replace damaged test leadswith identical model number or electricalspecifications before using the Meter.Do not apply more that the rated voltage, asmarked on the Meter.

5


When measurement has been completed,disconnect the connection between the testleads and the circuit under test, remove thetesting leads away from the input terminals ofthe Meter and turn the Meter power off.Do not carry out the measurement when theMeter’s back case and / or battery door is openedto avoid electric shock.When the Meter working at an effective voltageover 30V in AC, special care should be taken.Use the proper terminals and function for yourmeasurements.Do not use or store the Meter in an environmentof high temperature, humidity, explosive,inflammable and strong magnetic field. Theperformance of the Meter may deteriorate afterdampened.Do not use the Meter if the surface of it is wetor the user’s hands are wet.When using the test leads, keep your fingersbehind the finger guards.Replace the battery as soon as the battery

indicator appears. With a low battery, theMeter might produce false readings that canlead to electric shock and personal injury.When opening the battery door, must make surethe Meter is power off.When servicing the Meter, use only the samemodel number or identical electricalspecifications replacement parts.The internal circuit of the Meter shall not bealtered at will to avoid damage of the Meter andany accident.Soft cloth and mild detergent should be used toclean the surface of the Meter when servicing.No abrasive and solvent should be used toprevent the surface of the Meter from corrosion,damage and accident.Turn the Meter off when it is not in use and takeout the battery when not using for a long time.Constantly check the battery as it may leak whenit has been using for some time, replace thebattery as soon as leaking appears. A leakingbattery will damage the Meter.

6


The Meter StructureA. The Meter Face View (see figure 1)

Figure 1

Brack Red

International Electrical Symbols

AC (Alternating Current)GroundingDouble InsulatedWarning. Refer to the Operating ManualDeficiency of Built-In BatteryDanger of High VoltageConforms to Standards of European Union

7


1

2

345678

Transformer Jaw: designed to pick up the ACand DC current flowing through the conductor.It could transfer current to voltage. The testedconductor must vertically go through the Jawcenter.Hand Guards: to protect user’s hand fromtouching the dangerous area.Power buttonMax/ buttonMENU buttonLOAD button (recall data)CLEAR button (clear the stored reading)MIN/ button

9101112131415161718192021

Temperature negative Input TerminalTemperature positive Input TerminalV: Voltage Input TerminalCOM Input TerminalMAX/MIN buttonCAL: calibration buttonSAVE button (data store button)USB buttonLIGHT button (auto display backlight button)HOLD buttonLCD DisplayTesting Leads (Red and Black)Temperature Probe

8


B.The Meter Back and Bottom Structure (see figure 2)

1 Infrared Interface

2 USB Communication Interface Cable

Figure 2

Functional ButtonsBelow table indicated for information about the functionalbutton operations.

Operation PerformedPress and hold POWER for 1 second toturn the Meter on.Press POWER again to turn the Meter off.

Press HOLD to enter the Hold mode inany mode, appears and the Meterbeeps.Press HOLD again to exit the Hold modeto return to measurement mode, theMeter beeps and disappears.Press LIGHT to turn the display backlighton.The display backlight will be offautomatically after 30 seconds.

ButtonPOWER

HOLD

LIGHT

MENU

H

Press MENU to display the followingfunctions in sequence:

H

9


Operation Performed

AC Voltage (main display) + Frequency(secondary display)AC Current (main display) + AC Voltage(secondary display)Active power (main display) + Phaseangle (secondary display)Apparent power (main display) +Reactive power (secondary display)Power factor (main display) + Phaseangle (secondary display)Active Energy (main display) + Time(secondary display)Temperature (main display) +Temperature (secondary display)Press LOAD once, MR icon shown, theMeter displays the next stored reading,the left secondary display showing theindex increase one.Press USB once to turn the USB

Button

MENU

Operation Performed

interface on, USB appears and the Meterbeeps.Press USB again to turn the USBinterface off, USB disappears and theMeter beeps.It is invalid at active energy mode.Press once to enter LOAD mode, MRappears and the Meter beeps.Press again to exit LOAD mode, MRdisappears and the Meter beeps.Press and hold LOAD for 1 second todisplay the stored data quickly.

Button

USB

USB

LOAD

Calibrating data. It is not recommended tocalibrate the meter without authorization.

CAL

SAVE Press once to store single reading, MEMappears and the Meter beeps.Press and hold for over 1 second tocontinuous store reading, MEM blinksand the Meter beeps. The index number

10


Operation PerformedButtonSAVE shown on the left secondary display keep

on increasing. Press SAVE again to exit.The maximum number of data store is 99,when it achieves 99, the Meter shows FUL.Press CLEAR to clear the stored readingin order to store next reading.

CLEAR At active energy range, press to resettime the zero, then restart the timing.At all other ranges, press to clear storedreadings.Press once at LOAD mode, MR iconshown, the Meter displays the previousstored reading, the left secondarydisplay showing the index decreaseone.

MAX/MIN Starts recording of maximum andminimum vales. Press to step throughmaximum (high), minimum (low) andthe current AC voltage True RMS value

Operation PerformedButtonMAX/MIN at any mode except at the following ranges:

Power factor (main display) + Phaseangle (secondary display)Active Energy (main display) + Time(secondary display)Temperature (main display) +Temperature (secondary display)

11


Display Symbols (see figure 3)

Figure 3

1 2 3 4 5 6

7

8

9

10

11

12

131415161718

19

20

21

22

23

24

MeaningData hold is activeData Output is in progressIndicator for DC measurementUnit for hourUnit for minuteUnit for secondThe battery is low. Warning: To avoid falsereadings, which could lead topossible electric shock orpersonal injury, replace thebattery as soon as the batteryindicator appears.

Number1234567

8

Symbol

USBDChmms

Hz,PG,KVAr

Symbol of Unit.Hz: Hertz. The unit of frequency.PG: The unit of phase angleKVAr: The unit of reactive powerMinimum reading

H

12


MeaningMinimum readingAnalogue Bar GraphOverloadingRulerMaximum readingTemperature symbolCalibration symbolIndicator for clear the storedreadingRuler negative symbolHigh voltage symbolIndicates negative readingIndicator for AC voltage orcurrentIndicator for recall the storedreadingFrequency symbol

Number 910111213141516

17181920

21

22

MeaningIndicator for data storeIndicator for data stored is full

Number2324

SymbolMIN

MAXTEMPCALCLR

AC

MR

FREQ

SymbolMEMFUL

13


Figure 4

Measurement Operation

Press and hold POWER for one second to turn theMeter on. The default range is the last measurementrange when you turned off the Meter.Replace the battery as soon as the battery indicator“ ” appears on the display.

A. AC Voltage (main display) + Frequency (secondary display) Measurement (see figure 4)

Brack Red

Circuit

14


When the voltage input is higher than 30V, thedisplay shows to warn you to take extra careof safety.When the input voltage is higher than 600V(r.m.s.), the display shows OL.

The AC Voltage ranges are:15V, 100V, 300V and 600V

The frequency range is:20Hz~500Hz

Warning

To measure AC voltage + frequency, connect the Meteras follows:

Insert the red test lead into the V terminal and blacktest lead to the COM input terminal.Press the MENU to select Voltage (main display)+ Frequency (secondary display) range and connectthe two test leads to the object being measured.The double display shows the AC voltage TrueRMS value and the frequency value.

1.

2.

3.

Press MAX/MIN again to show the present ACvoltage True RMS value.The display shows OL when the input voltage ishigher than 600V (r.m.s).

6.

7.

When the measurement has been completed,disconnect the connection between the testing leadsand the circuit under test and remove testing leadsfrom the input terminals.

Note

Press MAX/MIN once, the LCD displays MAX, itstarts recording the maximum AC voltage True RMSvalue.Press MAX/MIN again, the LCD displays MIN, itstarts recording the minimum AC voltage True RMSvalue.

4.

5.

15


B. AC Current (main display) + AC Voltage (secondary display) Measurement (see figure 5)

Figure 5

The AC current ranges are:40A, 100A, 400A and 1000A

The AC Voltage ranges are:15V, 100V, 300V and 600V

To measure AC current + AC voltage, connect the Meteras follows:

Press the MENU to select AC Current (main display)+ AC Voltage (secondary display) range.Press the lever to open the transformer jaw.Center the tested conductor within the transformerjaw, then release the Meter slowly until thetrasnformer jaw is completely closed, Make surethe conductor to be tested is placed at the centerof the transformer jaw, otherwise it will casuedeviation. The Meter can only measure oneconductor at a time, to meausre more than onecondutor at a time will cause deviation.The double display shows the AC current TrueRMS value and AC voltage True RMS value.Press MAX/MIN once, the LCD displays MAX, it

1.

2.3.

4.

5.

16


C. Active Power (main display) + Phase Angle (secondary display) Measurement (see figure 6)

Figure 6

starts recording the maximum AC current True RMSvalue.Press MAX/MIN again, the LCD displays MIN, itstarts recording the minimum AC current True RMSvalue.Press MAX/MIN again to show the present ACcurrent True RMS value.The display shows OL when the current of thetested conductor is higher than 1000A rms.

6.

7.

8.

When the measurement has been completed,disconnect the connection between the conductorunder test and the jaw, and remove the conductoraway from the transformer jaw of the Meter.

Note

Brack

Red

17


The active power ranges are:40A, 100A, 400A and 1000A

The phase angle ranges are: 0° ~360°

Warning

To avoid damages to the Meter or harms to you, doyou measure higher than AC voltage 600 v.r.s. andAC current 1000A v.r.s.

To measure active power + phase angle, connect theMeter as follows:

Press the MENU to select Active power (maindisplay) + Phase angle (secondary display) range.Press the lever to open the transformer jaw, andclamp them to the power source or the testedconductor.Insert the red test lead to V input terminal and blacktest lead to COM input terminal and connect themto tbe live wire and neutrual wire of the tested circuit.

1.

2.

3.

The double display shows the active power kWvalue and the PG value of the measured object.The maximum active power kW measuring rangeis 600kW, OL will be displayed when it is over thanthat.Press MAX/MIN once, the LCD displays MAX, itstarts recording the maximum active power value.Press MAX/MIN again, the LCD displays MIN, itstarts recording the minimum active power value.Press MAX/MIN again to show the present activepower value.

4.

5.

6.

7.

8.

When testing has been completed, disconnect theconnection between the testing leads and the circuitunder test and remove testing leads from the inputterminals.

Note

Figure 7

18


D. Apparent Power (main display) + Reactive Power (secondary display) Measurement (see figure 7)

Brack

Red

To avoid damages to the Meter or harms to you, doyou measure higher than AC voltage 600V rms andAC current 1000A rms.

Warning

To test for Apparent power (main display) + Reactivepower (secondary display), connect the Meter as follows:

Press the MENU to select Apparent power (maindisplay) + Reactive power (secondary display) range.Press the lever to open the transformer jaw, andclamp them to the power source or the testedconductor.Insert the red test lead to V input terminal and blacktest lead to COM input terminal and connect themto tbe live wire and neutrual wire of the tested circuit.The double display shows the apparent power kVAvalue and the reactive power KVAr value of themeasured object.The maximum apparent value kVA and the reactivepower KVAr measuring range is 600kVar. OL willbe displayed when it is over than that.Press MAX/MIN once, the LCD displays MAX, it

1.

2.

3.

4.

5.

6.

Figure 8


19

starts recording the maximum apparent powervalue.Press MAX/MIN again, the LCD displays MIN, itstarts recording the minimum apparent power value.Press MAX/MIN again to show the present apparentpower value.

7 .

8 .


Note

E. Power Factor (main display) + Phase Angle (secondary display) Measurement (see figure 8)

Brack

Red


20


Warning

To test for Apparent power (main display) + Reactivepower (secondary display), connect the Meter as follows:

Press the MENU to select Power factor (maindisplay) + Phase angle (secondary display) range.Press the lever to open the transformer jaw, andclamp them to the power source or the testedconductor.Insert the red test lead to V input terminal and blacktest lead to COM input terminal and connect themto tbe live wire and neutrual wire of the tested circuit.The double display shows the power factor valueand the phase angle value of the measured object.When the power factor value is negative, it meansthe loading is capacItive.When the power factor value is positive, it meansthe loading is inductive.MAX and MIN are not valid when measuring power

1.

2.

3.

4.

5.

6.

7.

factor.


Note

21


F. Active Energy (main display) + Time (secondary display) Measurement (see figure 9)

Figure 9

Brack

Red

Warning


To test for Active Energy (main display) + Time(secondary display), connect the Meter as follows:

Press the MENU to select Power factor (maindisplay) + Phase angle (secondary display) range.Press the lever to open the transformer jaw, andclamp them to the power source or the testedconductor.Insert the red test lead to V input terminal and blacktest lead to COM input terminal and connect themto tbe live wire and neutrual wire of the tested circuit.The double display shows the active energy valueand the measuring time value of the measuredobject.

1.

2.

3.

4.

The measuring reading gets increasing alongwith the time increases. Press HOLD to read aparticular time kWh value. Then the reading and

22


time are locked, but still continuous accumulatemeasuring time.After read the data, press HOLD again tocontinous measurement. kWh value continousaccumulate and the measuring time jumps tothe present measuring time.When the measuring time is over 24 hours orthe Meter is switched to other measuring ranges,active energy measuring will stop.The maximum readinng of acitve energy is9999kWh. OL will be displayed when the readingis over than that.

MAX and MIN are not valid when measuring activeenergy.Press CLEAR to reset the time.

5.

6.


Note


G. Temperature (main display) and Temperature (secondary display) Measurement (see figure 10)

Figure 10

23

K type oftemperature probe

To test for temperature (main display) and Temperature (secondary display), connect the Meter as follows:

Press the MENU to select Power factor (main display)+ Phase angle (secondary display) range.Inser the temperature probe positve to the TEMP+input terminal and negative to the TEMP – inputterminal and connect it to the mesaured object.The double display shows the present degree celsiusvalue on the main display and the fahrenheit valueon the secondardy display.

1.

2.

3.

When testing has been completed, disconnect theconnection between the temperature probe and thecircuit under test and remove temperature probefrom the input terminals.

Note


24

True RMS Measurement and Average ValueMeasurement

The True RMS measurement method can measureaccurately the effective value of non-sine wave inputsignal.

Average value measurement method can measure themean value of one sine wave input signal, and thendisplays it as RMS value

When the input waveform has distortion, measuringtolerance will be included. The total tolerance dependson the total distortion. Below table 1 shows the waveformcoefficient and the relationship and the requestedchanging factor of sine wave, square wave, pulserectangle wave, sawtooth triangle wave, RMS valueand average value.

Input Wave PK-PK 0-PK RMS AVGSine

PK0 PK-PK

sine commute(whole wave)

PK0 PK-PK

sine commute(half wave)

PK0 PK-PK

square wavePK0 PK-PK

commuted square wavePK0 PK-PK

pulse rectangle

X0 PK-PKY

D=X/Y

sawtooth trianglePK0 PK-PK

2.828

1.414

2.828

1.800

1.800

0.9/D

3.600

1.414

1.414

2.828

0.900

1.800

0.9/ D

1.800

1.000

1.000

1.414

0.900

1.272

0.9D/2

1.038

0.900

0.900

0.900

0.900

0.900

0.9/D

0.900

Three Phases Four Wires and Three PhasesThree Wires Measurement Method

25


The Model UT231 digital power clamp meter canmeasure single phase power and power factor. Thepower of three phases four wires system can use singlephase power measurement method to measure, seefigure 7.

If it is a balance load, the total watts is three times ofsingle phase. If it is not a balance load, test eachphase power separately, then sum up the three phasespower value to obtain the total watt. The apparentpower, reactive power, active energy and active powermeasurement methods are the same.

Power factor value can be obtained directly from eachphase power factor testing. Thee phases total powerfactor is equal to three phases total active power valuedivided by three phases total apparent power value.

Under three phases three wires balance load situation,

its total watt can be directly by measuring its voltage ofthe line and current of the line. Connect the loaded twophases to the V and COM input terminal of the powermeter, clamp the transformer jaw to the third phase, itstotal watt is equal to the reading obtained times 1.732.

Three phases total watt also can be obtained by usingthe specified clamp type three phases digital powermeter.

26


SpecificationsA. General Specifications

Maximum Voltage between any Terminals andgrounding: Refer to different range input protectionvoltage.Display: Multi LCD displays, Maximum display 9999.Ranges: AutoOverloading: Display OL.Battery Deficiency: Display .Data Holding: Display H.Data Logging: Maximum 99, Single or ContinuousrecordsData RecallMaximum and Minimum value display: Voltage,Current, Active Power and Apparent Power rangesDisplay Backlight: White colourComputer connection: USBCalibration FeatureSleep Mode: To preserve battery life, the Meterautomatically turns off if you do not turn press anybutton for around 15 minutes., except at active

energy range.Analogue Bar GraphSampling: 3 times per second.Max. Jaw Size: 55mm diameter.Power: 4 x 1.5V battery (LR6)Dimensions: 303mm x 112mm x 39mmWeight: Approximate 601g

B. Environmental Requirements

Altitude: Operating: 2000m Storage: 10000mTemperature and humidity: Operating: 0 ~30 ( 85%R.H) 30 ~40 ( 75%R.H) 40 ~50 ( 45%R.H) Storage: -10 ~+60 ( 85%R.H)Safety/ Compliances: IEC 61010 CAT.III 600V,CAT.IV 300V overvoltage and double insulationstandard, pollution degree 2.Certification:


27

Accurate SpecificationsAccuracy: (a% reading + b digits), guarantee for 1 year.Operating temperature: 23 5Operating humidity: 45~75%R.H

A. AC Voltage (True RMS)

Range

15V100V300V

Resolution

0.1V

Accuracy

(1.2%+5)

Allowable Maximum overload protectionvoltage

600 RMS

B. Frequency

Precision1Hz

Accuracy(0.5%+5)

Range20Hz~500Hz

Input Impedance

10M


28

C. AC Current (True RMS)

Range

40A100A400A1000A

Resolution

0.1A

1A

Accuracy

(2%+5)

Allowable Maximum overload protectioncurrent

1000A RMS

D. Active Power (W=V x A x COS Φ)

Voltage / CurrentVoltage Range

15V0.60kW1.50kW6.00kW15.00kW

100V4.00kW10.00kW40.00kW100.0kW

300V12.00kW30.00kW120.0kW300.0kW

600V24.00kW60.00kW240.0kW600.0kW

(3%+5)

100kW:0.01kW 100kW: 0.1kW

CurrentRange

PrecisionDefend Rate

40A100A400A1000A

Remarks:Allowable maximum overload protection voltage: 600V RMSAllowable maximum overload protection current: 1000A RMS

29


E. Apparent Power (VA = V x A)

Voltage Range15V0.60kVA1.50kVA6.00kVA15.00kVA

100V4.00kVA10.00kVA40.00kVA100.0kVA

300V12.00kVA30.00kVA120.0kVA300.0kVA

600V24.00kVA60.00kVA240.0kVA600.0kVA

(3%+5)1000kVA:0.01kVA 100kVA: 0.1kVA

CurrentRange

AccuracyResolution

40A100A400A1000A

Remarks:

Allowable maximum overload protection voltage: 600V RMSAllowable maximum overload protection current: 1000A RMS

Voltage / Current

30


F. Reactive Power (Var = V x A x SIN Φ)

Voltage Range15V0.60kVar1.50kVar6.00kVar15.00kVar

100V4.00kVar10.00kVar40.00kVar100.0kVar



(4%+5)1000kVar: 0.01kVar 100kVar: 0.1kVar

CurrentRange

AccuracyResolution

40A100A400A1000A

Remarks:


Voltage / Current


31

G. Power Factor (PF = W / VA)

Range0.3~1(capacitive or inductive)0.3~1(capacitive or inductive)

Accuracy

0.022

Resolution

0.001

Measuring ConditionThe minimum measuring current 10AThe minimum measuring voltage 45VMeasuring current less than 10A ORMeasuring voltage less than 45V

Remarks:


H. Phase Angle (PG=acos (PF))

Accuracy

1o

Resolution

1o

Measuring ConditionThe minimum measuring current 10AThe minimum measuring voltage 45VMeasuring current less than 10A ORMeasuring voltage less than 45VFor reference only

Range

0o ~360o

0o~360o

For reference only


32

I. Active Energy (kWh)

Range1~9999kWh

Accuracy(3%+2)

Resolution0.001kWh

Remarks:


K. Temperature (TEMP)

Range-50 ~00 ~1300-58 ~3232 ~2372

Accuracy(1%+10)(1%+5)(1%+18)(1%+11)

Resolution11

MAINTENANCE

33


This section provides basic maintenance informationincluding battery replacement instruction.

Warning

Do not attempt to repair or service your Meter unlessyou are qualified to do so and have the relevantcalibration, performance test, and serviceinformation.

To avoid electrical shock or damage to the Meter,do not get water inside the case.

A. General ServicePeriodically wipe the case with a damp cloth andmild detergent. Do not use abrasives or solvents.To clean the terminals with cotton bar with detergent,as dirt or moisture in the terminals can affectreadings.Turn the Meter power off when it is not in use.Take out the battery when it is not using for a longtime.

Do not use or store the Meter in a place of humidity,high temperature, explosive, inflammable and strongmagnetic field.

Figure 11

34


B. Replacing the Battery (see figure 11) Warning

To avoid false readings, which could lead to possibleelectric shock or personal injury, replace the batteryas soon as the battery indicator “ ” appears.Make sure the transformer jaw and the tests leadsare disconected from the circuit being tested beforeopening the case bottom.

To replace the battery:.

Press POWER to turn the Meter off and remove allthe connections from the input terminalsTurn the Meter’s front case down.Remove the screw from the battery door, and separatethe battery door from the case bottom.Take out the old battery and replace with 4 x 1.5Vbattery (LR6).Rejoin the case bottom and the battery compartment,and reinstall the screw.

1.

2.3.

4.

5.


35

This operating manual is subject to change without notice.

*END*


36

Copyright 2007 Uni-Trend Group Limited.All rights reserved.

Manufacturer:Uni-Trend Technology (Dongguan) LimitedDong Fang Da DaoBei Shan Dong Fang Industrial Development DistrictHu Men Town, Dongguan CityGuang Dong ProvinceChinaPostal Code: 523 925

Headquarters:Uni-Trend Group LimitedRm901, 9/F, Nanyang Plaza57 Hung To RoadKwun TongKowloon, Hong KongTel: (852) 2950 9168Fax: (852) 2950 9303Email: [email protected]://www.uni-trend.com

Documents

UT231 Ó¢ÎÄ·âÃæ2 25 26 26 26 27 27 27 28 28 29 30 31 31 32 32 33 33 34 model ut231: operating manual table of contents title page