Model UT233 OPERATING MANUAL5 Model UT233: OPERATING MANUAL l l l l l l l l l l l l l testing leads...

Model UT233OPERATING MANUAL

Model UT233: OPERATING MANUAL

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TABLE OF CONTENTSTITLE PAGE

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. Active power + AC Voltage + AC Current MeasurementB. Apparent Power + AC Voltage + AC Current MeasurementC. Reactive Power + AC Voltage + AC Current MeasurementD. Power Factor cos + AC Voltage + AC Current MeasurementE. Phase Angle + AC Voltage + AC Current MeasurementF. Frequency Hz + AC Voltage + AC Current MeasurementG. Active Energy + Active Power + Time Measurement

334467789121414212426283032

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TABLE OF CONTENTSTITLE PAGE

H. Phase SequenceSpecifications A. General Specifications B. Environmental RequirementsAccuracy Specifications A. AC Voltage (True RMS) B. Frequency C. AC Current (True RMS) D. Active Power E. Apparent Power F. Reactive Power G. Power Factor H. Phase Angle I. Active EnergyMaintenance A. General Service B. Replacing the Battery

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

WarningTo avoid electric shock or personal injury, read theìSafety Informationî and ìRules for Safe Operationîcarefully before using the Meter.

Model UT233 is a digital power clamp meter (hereafterreferred to as ìthe Meterî) 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 and Phase Sequence.

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

Item12

3

4567

DescriptionEnglish Operating ManualTest Lead (red, black, blueand yellow colourAlligator Clip (red, black, blueand yellow colour)USB Interface CableSoftwareTool Box1.5V Battery (LR6)

Qty1 piece1 piece eachcolour1 piece eachcolour1piece1 piece1 piece4 pieces

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

Overview Unpacking Inspection

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Safety InformationThis 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 and

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in this Operating Manual are explained on page 6.

Rules For Safe Operation

Warning

To avoid possible electric shock or personal injury,and to avoid possible damage to the Meter or to theequipment under test, adhere to the following rules:

Before using the Meter inspect the case. Donot use the Meter if it is damaged or the case(or part of the case) is removed. Look for cracksor missing plastic. Pay attention to the insulationaround the connectors.Inspect the test leads for damaged insulationor exposed 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.When measurement has been completed,disconnect the connection between the testleads and the circuit under test, remove the

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l

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testing leads away from the input terminals ofthe Meter and turn the Meter power off.Do not carry out the measurement when theMeterís 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 userís hands are wet.When using the test leads, keep your fingersbehind the finger guards.Replace the battery as soon as the batteryindicator 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 usedto clean 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 leakwhen it has been using for some time, replacethe battery as soon as leaking appears. Aleaking battery will damage the Meter.

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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

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Figure 1

1

2

34567

89

10

111213

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 userís hand fromtouching the dangerous area.Power buttonMax/ buttonMENU buttonLOAD button (recall data)SELECT button (press to select alternatefunction and sum of Watts measurement)MIN/ buttonV3 Input Terminal (Third phase measurement)V2 Input Terminal(Second phase measurement)V1 Input Terminal (First phase measurement)COM Input TerminalCLEAR button (maximum and minimum)

The Meter Structure

A. The Meter Front Structure (see figure 1)

Black Red Blue Yellow

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1 Infrared slot2 USB Interface Cable

Figure 2

14151617181920

button (Sum)SAVE button (data store button)USB buttonLIGHT button (auto display backlight button)HOLD buttonLCD DisplayTesting Leads (Red, Black, Blue and Yellow)

B. The Meter Back and Bottom Structure (see figure2)

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Functional ButtonsBelow table indicated for information about the functionalbutton operations.

ButtonPOWER

HOLD

LIGHT

MENU

ButtonMENU

Operation PerformedPress and hold POWER for 1 secondto turn the Meter on.Press POWER again to turn the Meteroff.Press HOLD to enter the Hold modein any mode,appears and the Meterbeeps.Press HOLD again to exit the Holdmode to return to measurement mode,the Meter beeps and disappears.Press LIGHT to turn the display backlighton.The display backlight will be off automaticallyafter 30 seconds.

Press MENU to display the followingfunctions in sequence:

Active power (main display) + AC Voltage(left secondary display) + AC Current(right secondary display)

Operation Performed

Apparent Power (main display) + ACVoltage (left secondary display) + ACCurrent (right secondary display)Reactive Power (main display) + ACVoltage (left secondary display) + ACCurrent (right secondary display)Power Factor (main display) + ACVoltage (left secondary display) + ACCurrent (right secondary display)Phase Angle (main display) + ACVoltage (left secondary display) + ACCurrent (right secondary display).Frequency (main display) + ACVoltage (left secondary display) + ACCurrent (right secondary display).Active Energy (main display) + ActivePower (left secondary display) + Time(right secondary display)

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Button Button

SAVE

MAX/

Operation Performed

MENU Phase sequence

Press to start recording of maximum value,it valid at voltage, current, active power,apparent power and reactive powerranges only.Press once at LOAD mode, MR iconshown, the Meter displays the nextstored reading

LOAD 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.

SELECT At Active power (main display) + AC Voltage(left secondary display) + AC Current (rightsecondary display) mode, press SELECTbutton to step through first phase, secondphase, third phase and sum of watts.

Operation PerformedSELECT At other mode except phase sequence,

press SELECT to step through firstphase, second phase and the thirdphase.

Press once to store single reading,Press and hold for over 1 second tocontinuous store reading. Press SAVEagain to exit. The maximum numberof data store is 99, when it achieves99, the Meter shows FULL. PressCLEAR to clear the stored reading inorder to store next reading.

C L E A R At active energy range, press to resettime the zero, then restart the timing.At all other ranges, press to clear storedreadings.

MIN / Press to start recording of minimumvalue, it valid at voltage, current, activepower, apparent power and reactivepower ranges only.

Button Operation PerformedPress once at LOAD mode, MR iconshown, the Meter displays the previousstored reading.At Active power (main display) + Phaseangle (secondary display) mode, press

once button to sum up the current firstphase of 3 phase measurement result.Then carry out second phase powermeasurement.Press again to sum up the secondphase power measurement result, thencarry out third phase power measurement.Press again to sum up the third phasepower measurement result, then pressSELECT to enter the measurement ofsum of the watts mode, the display showsthe 3 phase sum of the watts value (Powerfactor + Active power + Reactive power).

MIN /

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Display Symbols (see figure 3)

Figure 3

1 2 3 4 5 6 7

8910111213

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4567

89

101112

MeaningCalibration symbolIndicator for data stored is fullIndicator for clear the storedreadingData Output is in progressData hold is activePhase sequenceThe battery is low.

Warning: To avoid falsereadings, which could lead topossible electric shock orpersonal injury, replace thebattery as soon as the batteryindicator appears.Watt: Sum of WattThird phase symbolPrimary reading unit symbolSecond phase symbolFirst phase symbol

SymbolCALFULCLR

USB

RST

W3

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Number

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13

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MeaningRight secondary display unitsymbolUnit for secondUnit for minuteUnit for hourLeft secondary display unit symbolMinimum readingMaximum readingAuto ranging indicatorCos indicatorIndicates negative readingIndicator for AC voltage or currentIndicator for data storeIndicator for recall the storedreadingHigh voltage symbol

Symbol

SmmhKWMINMAXAutoCosφ

MENMR

Number

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Measurement Operation

Press and hold ON/OFF button for one second toturn the Meter on. The default range is the lastmeasurement range when you turned off the Meter.Replace the battery as soon as the battery indicator appears on the display.

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

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

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

WarningTo avoid damages to the Meter or harms to you,do you measure higher than AC voltage 600 v.r.s.and AC current 1000A v.r.s.

Press the MENU to select Active power (maindisplay) + AC Voltage (left secondary display) + ACCurrent (right secondary display) range.Press the lever to open the transformer jaw, andclamp them to the corrresponding phase of testedconductor. If user needs to mesaure any phase ofthe 3 phase, then clamp them to that phaseísconductor.Connecting method (see figure 4, 5, 6).

1.

2.

3.

A. Active power (main display) + AC Voltage (left secondary display) + AC Current (right secondary display) Measurement (see figure 4)

To measure active power + AC voltage + AC current,connect the Meter as follows:

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Figure 4

Insert red test leads to V1 input terminal.Insert blue test leads to V2 input terminalInsert yellow test leads to V3 input terminalConnect red blue and yellow test leads to everylive wire of the 3 phase.Insert black test leads to COM input terminal andconnect it to the neutrual wire of the 3phase.You must specify that this connection is usedwhen the main transformer have STAR connection.

Black

Red

Blue

Yellow

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Insert red test leads to V1 input terminal.Insert blue test leads to V2 input terminalInsert black test leads to V3 input terminal andconnecting it to every live wire of the 3 phase.

Figure 5

Red

Blue

Yellow

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Figure 6

Insert red test lead to V1, V2 or V3 input terminalcorresponding to one of, 1, 2 or 3phaseInsert black test leads to COM input terminal.Connecting the two test leads to live and neutualwires.

When measuring 3 phases 4 wires or 3 phases 3wires:(see figure 7, 8, 9, 10, 11, 12, 13).

4.

Press SELECT to choose first phase 1, seefigure 7. The triple displays show the acitvepower kW value, the voltage value and the currentvalue of 1.

If necessary, press to get the sum of watts asfigure 8.

Figure 7

Figure 8

Black

Red

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After sum up the current power measurement valueof the first phase, then press SELECT to choosethe second phase 2, as figure 9.

Figure 9

The triple displays shows the value of acitve powerkW, AC voltage V and AC current A of 2.If ncessary, press to get the sum of watts as figure10.

Figure 11

After sum up the current power meaursuremnt valueof the second phase, then press SELECT again tochoose the third phase 3, as figure 11.

The triple displays shows the value of acitve powerKW, AC voltage V and AC current A of 3.If ncessary, press to get the sum of watts as figure12.

Figure 12 Figure 10


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After sum up the current power measurement valueof the third phase, finally press SELECT again todisplay the 3 phases sum of waltt value (sum ofpower factor + sum of active power + sum of reactivepower).

Figure 13

The maximum power is 600kW of single phase activepower, OL will be displayed when it is over than that.The maximum range is 1800kW of three phase sumof active power and reactive power, OL will bedisplayed when it is over than that.Press MAX/ , the display shows MAX, it startsrecording the maximum active power value, voltagevalue and current value. Press again to display thecurrent active power value, voltage value and currentvalue.Press MIN/ , the display shows MIN, it startsrecording the minimum active power value, voltagevalue and current value. Press again to display thecurrent active power value, voltage value and currentvalue.

5.

6.

7.


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When there is no input or single phase, the Meterdisplays OL. button is not valid.It can only sum up and save the currentmeasurement value. The maximum and minimumvalue cannot sum up and save.Only at this range can carry out sum of wattsmeasurement, other ranges cannot carry out thismeasurement.USB interface connection is invalid when carryingout sum of watt measurement.When testing has been completed, disconnect theconnection between the testing leads and the circuitunder test and remove testing leads from the inputterminals.

Note

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Figure 15

Apparent Power (main display) + AC Voltage(left secondary display) + AC Current (rightsecondary display) Measurement

B.

Warning

Press the MENU to select Apparent Power (maindisplay) + AC Voltage (left secondary display) + ACCurrent (right secondary display) range.Press the lever to open the transformer jaw, andclamp them to the corrresponding phase of testedconductor. If user needs to mesaure any phase ofthe 3 phase, then clamp them to that phaseísconductor.The connecting method of 3 phases 4 wires, 3phases 3 wires or single phase 2 wires, see figure4, 5 and 6.

1.

2.

3.

Press SELECT to choose the first phase 1, seefigure 15.

The triple displays shows the first phase valueof apparent power kVA, AC voltage V and ACcurrent A..Then press SELECT again to choose the secondphase 2, see figure 16.

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

To test for Apparent Power (main display) + AC Voltage(left secondary display) + AC Current (right secondarydisplay), connect the Meter as follows:

When measuring 3 phase 4 wires: (see figure 15,16, 17).

4.

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When measuring 3 phase 3 wires:

Figure 16

The triple displays shows the second phase valueof apparent power kVA, AC voltage V and AC currentA.Press SELECT again to choose the third phase 3,see figure 17.

Figure 17

The triple displays shows the third phase valueof apparent power kVA, AC voltage V and ACcurrent A.

5.The first phase and second phase operatingmethod is same as three phase 4 wires.Jump over the third phase measurement.

The maximum measuring range is 600kW whenmeasuring single phase apparent power kVA, OL wilbe displayed when it is over than that.Press MAX/ the display shows MAX, it startsrecording the maximum apparent power value, ACvoltage value and AC current value. Press again todisplay the current apparent power value, AC voltagevalue and AC current value.Press MIN/ the display shows MIN, it starts recordingthe minimum apparent power value, AC voltage valueand AC current value. Press again to display thecurrent apparent power value, AC voltage value andAC current value.

8.

7.

6.


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

Note


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Reactive Power (main display) + AC Voltage (leftsecondary display) + AC Current (right secondarydisplay) Measurement

C.

Warning

Press the MENU to select Reactive Power (maindisplay) + AC Voltage (left secondary display) + ACCurrent (right secondary display) range.Press the lever to open the transformer jaw, and

1.

2.

4. When measuring 3 phase 4 wires: (see figure 17,18, 19)

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

To test for Reactive Power (main display) + AC Voltage(left secondary display) + AC Current (right secondarydisplay), connect the Meter as follows:

clamp them to the corrresponding phase of testedconductor. If user needs to mesaure any phase ofthe 3 phase, then clamp them to that phaseísconductor.The connecting method of 3 phases 4 wires, 3phases 3 wires or single phase 2 wires, see figure4, 5 and 6.

3.

Press SELECT to choose the first phase 1,see figure 18.

Figure 18

The triple displays shows the first phase valueof reactive power Kvar, AC voltage V and ACcurrent A.

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The triple displays shows the second phase valueof reactive power Kvar, AC voltage V and AC currentA.Press SELECT again to choose the third phase 3,see figure 20.

Figure 20

The triple displays shows the third phase valueof reactive power Kvar, AC voltage V and ACcurrent A.

5. When measuring 3 phase 3 wires:The first phase and second phase operatingmethod is same as three phase 4 wires.Jump over the third phase measurement.

6. The maximum measuring range is 600kW when measuring single phase reactive power Kvar, OL wil be displayed when it is over than that.7. MAX and MIN are not valid at this measurement mode.

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

Note

Then press SELECT again to choose the secondphase 2, see figure 19.

Figure 19

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D. Power Factor cos (main display) + AC Voltage (left secondary display) + AC Current (right secondary display) Measurement

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

To test for Power Factor (main display) + AC Voltage(left secondary display) + AC Current (right secondarydisplay), connect the Meter as follows:1. Press the MENU to select Power Factor (main display) + AC Voltage (left secondary display) + AC Current (right secondary display) range.2. Press the lever to open the transformer jaw, and clamp them to the corrresponding phase of tested conductor. If user needs to mesaure any phase of the 3 phase, then clamp them to that phaseís conductor.3. The connecting method of 3 phases 4 wires, 3 phases 3 wires or single phase 2 wires, see figure 4, 5 and 6.

4. When measuring 3 phase 4 wires: (see figure 21, 22, 23)l Press SELECT to choose the first phase 1, see figure 21.

Figure 21

The triple displays shows the first phase value ofpower factor cos , AC Voltage V and AC CurrentA.Then press SELECT again to choose the secondphase 2, see figure 22.


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Figure 22

The triple displays shows the second phase valueof power factor cos , AC Voltage V and AC CurrentA.Press SELECT again to choose the third phase

3, see figure 23.

Figure 23

The triple displays shows the third phase value ofpower factor cos , AC Voltage V and AC Current A.

5. When measuring 3 phase 3 wires:

The first phase and second phase operatingmethod is same as three phase 4 wires.Jump over the third phase measurement.

6. MAX/ and MIN/ are not valid at this measurement mode.

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


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E. Phase Angle (main display) + AC Voltage (left secondary display) + AC Current (right secondary display) Measurement

Warning

To avoid damages to the Meter or harms to you, doyou measure higher than AC voltage 600V rms andAC current 1000A rms.To test for Phase Angle (main display) + AC Voltage(left secondary display) + AC Current (right secondarydisplay), connect the Meter as follows:

Press the MENU to select Phase Angle (maindisplay) + AC Voltage (left secondary display) + ACCurrent (right secondary display) range.Press the lever to open the transformer jaw, andclamp them to the corrresponding phase of testedconductor. If user needs to mesaure any phase ofthe 3 phase, then clamp them to that phaseísconductor.The connecting method of 3 phases 4 wires, 3phases 3 wires or single phase 2 wires, see figure4, 5 and 6

1.

2.

3.

When measuring 3 phase 4 wires: (see figure 24,25, 26)

4.

Press SELECT to choose the first phase 1,see figure 24.

Figure 24

The triple displays shows the first phase value ofphase angle AC Voltage V and AC Current A.Then press SELECT again to choose the secondphase 2, see figure 25

Figure 25

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The triple displays shows the second phase valueof phase angle AC Voltage V and AC CurrentA.Press SELECT again to choose the third phase

3, see figure 26.

The triple displays shows the third phase valueof phase angle AC Voltage V and AC CurrentA.

Figure 26

When measuring 3 phase 3 wires:5.

The first phase and second phase operatingmethod is same as three phase 4 wires.Jump over the third phase measurement.

MAX/ and MIN/ are not valid at this measurementmode.

6.


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F. Frequency Hz (main display) + AC Voltage (left secondary display) + AC Current (right secondary display) Measurement


Frequency Measurement only measures thefrequency of voltage signal not he frequency ofcurrent signal.To test for Frequency Hz (main display) + AC Voltage(left secondary display) + AC Current (right secondarydisplay), connect the Meter as follows:

1.

2.

Press the MENU to select Frequency Hz (maindisplay) + AC Voltage (left secondary display) + ACCurrent (right secondary display) range.Press the lever to open the transformer jaw, andclamp them to the corrresponding phase of testedconductor. If user needs to mesaure any phase ofthe 3 phase, then clamp them to that phaseísconductor.

3.

4.

The connecting method of 3 phases 4 wires, 3phases 3 wires or single phase 2 wires, see figure4, 5 and 6When measuring 3 phase 4 wires: (see figure 27,28, 29)

Press SELECT to choose the first phase 1, seefigure 27.

Figure 27


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The triple displays shows the first phase value offrequency Hz, AC Voltage V and AC Current A.Then press SELECT again to choose the secondphase 2, see figure 28

Figure 28

The triple displays shows the second phase valueof Frequency Hz AC Voltage V and AC Current A.Press SELECT again to choose the third phase 3,see figure 29.

Figure 29

The triple displays shows the third phase valueof Frequency Hz, AC Voltage V and AC CurrentA.

5. When measuring 3 phase 3 wires:The first phase and second phase operatingmethod is same as three phase 4 wires.Jump over the third phase measurement.

MAX/ and MIN/ are not valid at this measurementmode.

6.



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G. Active Energy (main display) + Active Power (left secondary display) + Time (right secondary display) Measurement


To test for Active Energy (main display) + Active Power(left secondary display) + Time (right secondary display),connect the Meter as follows:1.

2.

3.

Press the MENU to select Active Energy (maindisplay) + Active Power (left secondary display) +Time (right secondary display) range.Press the lever to open the transformer jaw, andclamp them to the corrresponding phase of testedconductor. If user needs to mesaure any phase ofthe 3 phase, then clamp them to that phaseísconductor.The connecting method of 3 phases 4 wires, 3phases 3 wires or single phase 2 wires, see figure4, 5 and 6.

4. Press SELECT to choose one of the three phases( 1, 2, 3), see figure 30.

The double display shows the value of testedobjectís active engergy kWh value and themeasuring time of the corresponding phase.The measuring reading gets increasing along withthe time increases. Press HOLD to read a particulartime kWh value. Then the reading and time arelocked, but still continuous accumulate measuringtime.After read the data, press HOLD again to continousmeasurement. kWh value continous accumulateand the measuring time jumps to the presentmeasuring time.

Figure 30

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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 at this measurementmode.Press CLEAR to reset the time.USB interface feature is not valid at this measurementmode.

5.

6.7.

NoteWhen there is no input signal, it cannot carry outactive energy measurement.When there is input signal, the maximum waitingtime is around 10s before timing.When testing has been completed, disconnect theconnection between the testing leads and the circuitunder test and remove testing leads from the inputterminals.

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H. Phase Sequence

For Phase Sequence Judging, connect the Meter asfollows:1. Press the MENU to select AC Voltage (main display) + AC Voltage (left secondary display) + AC Voltage (right secondary display) range as figure 31.

Insert red test lead into V1 input terminal.Insert blue test lead into V2 input terminal.Insert yellow test lead into V3 input terminal.Insert black test lead into COM input terminal.Connect these four test leads to the circuit undertest or the loading of three phases and groundingterminalFor the loaded return circuit of 3 phases 4 wires, theMeter shows the phase sequence result as figure32, 33 and 34:

Figure 31

Figure 32=phase missing

Figure 33=negative phase sequence

Figure 34=positive phase sequence

Black

Red

Blue

Yellow


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2. Positive phase sequence is shown as below figure 35. A

BC

V3 input terminalcorresponding voltage

Figure 35

When V1 input terminal, V2 input terminal and V3input terminal base on the below table connectingA phase, B phase and C phase, all three phasesvoltage are over 100V, LCD displays positive phasesequence result

Positive phase sequence

A, B, C phases

V1ABC

V2BCA

V3CAB

Input Terminal

Checking Result Positve phase sequence




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Negative phase sequence is shown as below figure. When V1 input terminal, V2 input terminal and V3input terminal base on the below table connectingA phase, B phase and C phase, all three phasesvoltage are over 100V, LCD displays negative phasesequence result, as figure 36.

3.

A, B, C phases

V1ABC

V2CAB

V3BCA

Input Terminal

Checking Result Negative phase sequence

A

BC


V1 input terminalcorresponding voltage.


Figure 36

When any one phaseís voltage has no singal or lessthan 100V at 3 phases 4 wires overload mode, theLCD display missing phase result.USB interface feature is not valid at this measurementmode.

4.

5.

Note

Postive and negative phase sequence checkingvoltage range is 100V ~500V.When testing has been completed, disconnect theconnection between the testing leads and the circuitunder test and remove testing leads from the inputterminals.

Negative phase sequence

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 .Data Logging: Maximum 99, Single or Continuousrecord and recall dataMaximum and Minimum value display: Voltage,Current, Active Power, Apparent Power and ReactivePower rangesDisplay BacklightComputer connection: USBSleep Mode: To preserve battery life, the Meterautomatically turns off if you do not turn press anybutton for around 15 minutes., except at activeenergy range.

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Analogue Bar GraphSampling: High speed: 2 times per second, Lowspeed: 1 time per 3 seconds, Mid speed: 1 time per2 seconds.Max. Jaw Size: 55mm diameter.Power: 4 x 1.5V Alkaline battery (LR6 AA)Dimensions: 303mm x 112mm x 39mmWeight: Approximate 601g

B. Environmental Requirements

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

A. AC Voltage (True RMS)

Range15V100V300V600V

Resolution

0.1V

Accuracy

(1.2%+5)

Allowable Maximum overload protection voltage

600 RMS

Input Impedance

10M

B. Frequency

Range20Hz~500Hz

Resolution1Hz

Accuracy(0.5%+5)


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D. Active Power ( W=V x A x COS )

Current / Voltage

CurrentRange

40A100A400A1000A

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

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

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

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

Voltages Range

AccuracyResolution

At 15/1000A range: (3%+10) Others: (3%+5)<100kW: 0.01kW

100kW: 0.1kW

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

C. AC Current (True RMS)Range40A100A400A1000A

Resolution

0.1A

1A

Accuracy

(2%+5)

Allowable Maximum overload protection current

1000A RMS


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E. Apparent Power (VA = V x A)

Current / Voltage

CurrentRange

40A100A400A1000A

15V0.60kVA1.50kVA6.00kVA15.00kVA

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

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

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

Voltages Range

AccuracyResolution


At 15/1000A range: (3%+10) Others: (3%+5)<100kVA: 0.01kVA

100kVA: 0.1kVA


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

Current / Voltage

CurrentRange

40A100A400A1000A

15V0.60kVar1.50kVar6.00kVar15.00kVar




Voltages Range

AccuracyResolution

15V/1000A Range: (4%+20) Other : (4%+5)<100kVar: 0.01kVar

100kVar: 0.1kVar


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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

For reference only

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

Range0° ~360°

0° ~360°

Accuracy

1°

Resolution

1°

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

For reference only



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I. Active Energy (kWh)

Range1~9999kWh

Accuracy(3%+2)

Resolution0.001kWh

Remarks: Allowable maximum overload protection voltage:

600V RMS Allowable maximum overload protection current:

1000A RMS

Figure 37


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MAINTENANCEThis section provides basic maintenance informationincluding battery replacement instruction.

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.

Warning

A. General Service

Periodically wipe the case with a damp cloth and milddetergent. Do not use abrasives or solvents.To clean the terminals with cotton bar with detergent,as dirt or moisture in the terminals can affect readings.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.

B. Replacing the Battery (see figure 37)


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To avoid false readings, which could lead to possibleelectric shock or personal injury, replace the batteryas soon as the battery indicator ì î appears.

Make sure the transformer jaw and the tests leadsare disconected from the circuit being tested beforeopening the case bottom.

Warning

To replace the battery:.

1.

2.3.

4.

5.

Press POWER to turn the Meter off and remove allthe connections from the input terminalsTurn the Meterís front case down.Remove the screw from the battery door, andseparate the 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.


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This operating manual is subject to change without notice.

*END*

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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

Model UT233 OPERATING MANUAL5 Model UT233: OPERATING MANUAL l l l l l l l l l l l l l testing leads...

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