ETCR 7300 User manual

CONTENT
Warning....................................................................................................1
.Introduction.........................................................................................2
Ⅱ. Model .................................................................................................3
Ⅲ. ElectricalSymbols............................................................................3
Ⅳ.TechnicalSpecification....................................................................3
Ⅴ. MeasurementAccuracy...................................................................5
1．Base Conditionsand Working Conditions..................................5
2．AC Voltage U..............................................................................6
3．AC CurrentI...............................................................................6
4．FrequencyF ................................................................................6
5．Active PowerP:W=(V ACOSФ)...........................................6
6．ApparentPowerS:VA=(V A)..................................................7
7．Reactive PowerQ:VAR=(V AsinФ)......................................7
8．PowerFactorPF:PF=W/VA......................................................7
9．PhaseAngle.................................................................................7
10．PowerEnergy W.......................................................................8
Ⅵ. Instrument Structure........................................................................8
Ⅶ. Method ofOperation......................................................................10
1．Switch On/Off...........................................................................10
2．Choose measurementmode ......................................................10
3．Max and Min measurement.......................................................10
4．BacklightControl......................................................................10
5．Data Hold/Storage.....................................................................10
6．DataAccess/Exit......................................................................11
8．Delete Data................................................................................11
9．MeasurementInstruction...........................................................11
Ⅶ. BatteryReplacement.....................................................................22
Ⅷ.Accessories.....................................................................................22

-1-
Warning
Thankyou forpurchasing our ETCR7300SeriesLargeCaliberThreePhase
PowerTester, inorder tobetter useof thisproduct, besureto:
----Toread thisuser manual carefully.
----Complystrictlywithsafetyrulesandprecautionssetoutinthismanual.
uPayspecial attentiontosafetyunder anycircumstanceswhile using the
instrument.
uTakenoteof thelabeltext and symbolson the panelandback of the
instrument.
uKeep the clampclean and maintain regularly.
uPleasedon tconnectthetesterwithcomputervia RS232 duringvoltage
measurement.
uPleasedontplaceand storethe instrumentatthe placewithhigh
temperature,humidity,moisturecondensation and straightsunlightfora
long time.
uReplacebatteryin timewhen the batteryvoltage is low.
uRemoveorreplacethe batteryif youexpect nottousetheinstrument fora
long time.
uTakenoteof thepolaritywhen replacethe battery.
uThe operation, demolition,calibration and maintenanceoftheinstrument
mustbe carried out byqualifiedpersonnel authorized todo so.
uThe meter should bestoppedfrombeing used immediatelyand sealed if
dangeris broughtupincaseofcontinueduse;onlyacompetent bodycan
be authorizedtodealwithit.
u“”in the manual isthe safetywarning sign,the contentsofthismanual
mustbe followed for safeoperation.
u“”andothersafetysigns, the contentsofthismanual mustbefollowed
for safeoperation.

-2-
.Introduction
ETCR7300 Series Large CaliberThree PhasePowerTester is well
designedandmanufactured for measuring three phaseAC voltage,current,
leakage current, phasebetween currentand voltage, phasebetween phase
voltage,frequency, power energy, phasesequence,activepower, reactive
power, apparentpower, power. It isamultifunctional, digital,intelligent tester.
Itslarge caliber80mm×80mm can clampelectriccableof80mm diameter, or
96mm×4mmflatcable and steel earthwires.It hasall the functionsof Large
CaliberLeakageClampMeterand MicroPower ClampMeter. Besides, italso
hasthisfunctionssuchasdistinguishtransformer wiring group, inductiveand
capacitivecircuits,test secondcircuitand busdifferentialprotection systems,
read thephaserelationship between CTsof the differential protection,check
the meter wiringright, repairlinesand equipment, etc.Provide operatorswith
asafe, accurateand convenient tester.
ETCR7300 Series Large CaliberThree Phase PowerTester sclamp
coreismadeofspecial alloy,adoptthelatestmagneticshieldingtechniques,
canalmostshieldtheinfluencefromexternal magneticfield,toensurethe
high precision,highstabilityand high reliabilityofperennial uninterrupted
measurement.The metercan store200setsofdata,withRS232 interface,
uploadstoreddatatothecomputerthroughthesystemsoftware,
implementing online real-timemonitoring,historicalinquires,dynamicdisplay.
Withthe function ofhistorical dataread,preserve,print, andbacklight,data
hold,etc. It is anecessarytoolfor electricalsafetytesting.

-3-
. Model
Model MeasurementRange Resolution Note
ETCR
7300
AC0.00mA-1200A 0.01mA
Can measureleakage
current, lowpower
AC 0.5W-720KW 0.01W
ETCR
7300A
AC 0.0A-2000A 0.1A Can measurebig current,
high power. Can’t
measureleakagecurrent
AC 0.1K-1200KW 1W
Note: Otherfunctionisthesame.
Ⅲ. Electrical Symbols
Extremelydangerous!The operatormuststrictlyabidebythesafety
rules;otherwisethereisriskofelectricshock,resultingin bodily
injuryorfatalities.
Dangerous!The operatormuststrictlyabidebysafetyrules;
otherwise thereisrisk ofelectric shock,resulting in bodilyinjuryor
fatalities.
Warning!Safetyrulesmust bestrictlyabidedby,otherwise personal
injuryorequipmentdamage maybe caused.
AlternateCurrent AC）
Direct Current DC）
Double Insulation
Ⅳ.TechnicalSpecification
Function
Measurethree phaseAC voltage,leakage current,
current, activepower,reactivepower,apparent
power,power,phasebetweencurrentandvoltage,
phasebetween phasevoltage,frequency,power
energy, phasesequence
Power 6VDC(LR6×4alkalinedrybatteries,continuously
working for12 hours)
Test Mode ClampCT, integral mode
Clamp Size 80mm×80mm(canclampelectriccableof80mm
diameter,or96mm×4mmflatcable and steelearth

-4-
wires)
Measured Wire
Position Measured wireatapproximatelythegeometriccenter of the clamp
DataStorage 200 sets,“FULL”symbolindicatethe memoryisfull
RS232 Interface
WithRS232 interface,download datatocomputerfor
analysis and management
Communication
Wire RS232 communicationwire, 1.8m
Frequency 50Hz,60Hzautomaticidentification
GearShift Automaticshift
SampleRate About 2times/second
Line Voltage BelowAC 600V line measurement
DisplayMode LCD: 128dots×64dots; Displayarea:43mm×29mm
MeterSize Length275mm ×Width145mm ×Height40mm
Backlight Controlled by “
*
”key
DataHold “HOLD”symbol appears
Overflow “OL”symbolappears
Automatic
Shutdown Automaticallyshutdownabout15 minutesafterpower on toreducebatteryconsumption
Voltage
Detection
Lowbatterysymbol “"appearstoremindthe
replacementofbatterywhen the batteryvoltagedrops
below5.2V.
Weight 1kg(withbatteriesand accessories)
Working
Current 50mAwithenabled backlight; 25mAwithdisabled backlight
Working
Temperature
and Humidity -10℃-40℃;80%rh
Storage
Temperature
and Humidity -10℃-60℃;below70%rh
Insulation
strength AC 3700V/rms(between coreand shell)
Safety
Specifications
IEC1010-1,IEC1010-2-032,2class ofpollution,CAT
Ⅲ(600V)

-5-
Ⅴ. MeasurementAccuracy
1Base ConditionsandWorking Conditions
InfluenceQuantity Model
Base
Condition Working Condition Note
Ambient Temp 7300
7300A
23℃±1℃-10℃-40℃----
Ambient Humidity 7300
7300A
40%-60% ＜80% ----
Signal Waveform 7300
7300A
sinewave sinewave β
=0.01
Signal Frequency 7300
7300A
50HZ±1HZ 45HZ-65HZ ----
CurrentAmplitude
inPower/Power
Energy/Phase/Phase
SequenceTest
7300 5A±0.1A 50mA-1200A ----
CurrentAmplitude
inPower/Power
Energy/Phase/Phase
SequenceTest
7300A 50A±1A 10A-2000A ----
Voltage Amplitude in
Power/Power
Energy/Phase/Phase
SequenceTest
7300
7300A
50V±1V 10V-600V ----
CurrentAmplitude
inPowerFactorTest
7300 5A±0.1A 50mA-1200A
Power
factor:
0.3-1
CurrentAmplitude
inPowerFactorTest
7300A 50A±1A 10A-2000A Power factor:
0.3-1
Voltage Amplitude in
PowerFactorTest 7300 7300A
100V±20V 10V-600V ----
External Electric
MagneticField 7300 7300A
Tobe avoided
Measured Wire
Position 7300 7300A
Measured wireat approximatelythe
geometriccenterof the clamp

-6-
2ACVoltageU
MeasurementRange
Accuracy Resolution
7300 7300A 7300 7300A
0.00V-9.99V
±(1.5%+5dgt)
0.01V
10.0V-99.9V 0.1V
100V-600V 1V
3ACCurrent I
Measurement
Range
Accuracy Resolution
7300 7300A 7300 7300A
0.00mA-9.99mA ±(1.5%+5dgt) ---- 0.01mA ----
10.0mA-99.9mA ±(1.5%+5dgt) ---- 0.1mA ----
100mA-999mA ±(1.5%+5dgt) ±(2.0%+5dgt) 1mA 0.1A
1.00A-9.99A ±(1.5%+5dgt) ±(2.0%+5dgt) 0.01A 0.1A
10.0A-99.9A ±(1.5%+5dgt) ±(2.0%+5dgt) 0.1A 0.1A
100A-1199A ±(2.0%+5dgt) ±(2.0%+5dgt) 1A 1A
1200A-2000A ---- ±(2.5%+5dgt) ---- 1A
4FrequencyF
Measurement
Range
Accuracy Resolution
7300 7300A 7300 7300A
25Hz-100Hz ±(0.5%+5dgt) 0.1Hz
5ActivePowerP:W=( V×A×COSФ)
Measurement
Range
Accuracy Resolution
7300 7300A 7300 7300A
0.50W-9.99W ±(3%+5dgt) ---- 0.01W ----
10.0W-99.9W ±(3%+5dgt) ---- 0.1W ----
0.10KW-9.99KW ±(3%+5dgt) ±(3%+5dgt) 0.01KW 0.01KW
10.0KW-99.9KW ±(3%+5dgt) ±(3%+5dgt) 0.1KW 0.1KW

-7-
100KW-719KW ±(3%+5dgt) ±(3%+5dgt) 1KW 1KW
720KW-1200KW ---- ±(4%+5dgt) ---- 1KW
6Apparent PowerS:VA=(V×A)
Measurement
Range
Accuracy Resolution
7300 7300A 7300 7300A
0.50VA-9.99VA ±(3%+5dgt) ---- 0.01VA ----
10.0VA-99.9VA ±(3%+5dgt) ---- 0.1VA ----
0.10KVA-9.99KVA ±(3%+5dgt) ±(3%+5dgt) 0.01KVA 0.01KVA
10.0KVA-99.9KVA ±(3%+5dgt) ±(3%+5dgt) 0.1KVA 0.1KVA
100KVA-720KVA ±(3%+5dgt) ±(3%+5dgt) 1KVA 1KVA
720KVA-1200KVA ---- ±(4%+5dgt) ---- 1KVA
7ReactivePowerQ:VAR=( V×A×sinФ)
Measurement
Range
Accuracy Resolution
7300 7300A 7300 7300A
0.50var-9.99var ±(3%+5dgt) ---- 0.01var ----
10.0var-99.9var ±(3%+5dgt) ---- 0.1var ----
0.10Kvar-9.99Kvar ±(3%+5dgt) ±(3%+5dgt) 0.01Kvar 0.01Kvar
10.0Kvar-99.9Kvar ±(3%+5dgt) ±(3%+5dgt) 0.1Kvar 0.1Kvar
100Kvar-719Kvar ±(3%+5dgt) ±(3%+5dgt) 1Kvar 1Kvar
720Kvar-1200Kvar ---- ±(4%+5dgt) ---- 1Kvar
8PowerFactorPF:PF=W/ VA
MeasurementRange Accuracy Resolution
7300 7300A 7300 7300A
0.3-1.0
(CapacitiveorInductive) ±(0.02+5dgt) 0.001
9PhaseAngle
MeasurementRange
Accuracy Resolution
7300 7300A 7300 7300A
0.0°-360.0°±(1.5°+5dgt) 0.1°

-8-
10 PowerEnergyW
MeasurementRange
Accuracy Resolution
7300 7300A 7300 7300A
0.0000KWh-9.9999KWh ±(3%+5dgt) ±(4%+5dgt) 0.0001KWh
10.000KWh-99.999KWh ±(3%+5dgt) ±(4%+5dgt) 0.001KWh
100.00KWh-999.99KWh ±(3%+5dgt) ±(4%+5dgt) 0.01KWh
1000.0KWh-9999.9KWh ±(3%+5dgt) ±(4%+5dgt) 0.1KWh
10000KWh-72000KWh ±(3%+5dgt) ±(4%+5dgt) 1KWh
Ⅵ. InstrumentStructure
1. Clamp(80mm×80mm)
2.*/△key:Open/Closethe backlight, increasethe page number byone,
switchMAX/MIN measurement states.
3. HOLDkey: Datahold and store.
4. /∑key: Left movethe cursor,sumup the threephasepower.
5. POWERkey: Power ON/OFF

-9-
6. MODE/▽key:Switchthe measurementmode(7kindsofdifferent
modes), decreasethepage numberbyone.
7. LCD display(See the belowdetails)
8. U1voltage input
9. U2voltage input
10. RS232interface,upload datatocomputer.
11. U3voltageinput
12. Publicinputof three phasevoltage(COM)
13.φ3/CLRkey:Choosetomeasure φ3phasevoltageorpower,cleardate
storage.
14. Opening lever
15.MEMkey:Access/Exit data reading
16.φ2/▷key:Choosetomeasure φ2phasevoltage orpower,rightmove
the cursor
17.φ1key: Choosetomeasure φ1phasevoltage or power
18. Upand downcover connectingscrews
19. Batterycover
20. Batterycoverscrew
21. Test wires
LCD Display
1. The firstrowon the LCD: displaythemeasurement value
2. The secondrowon theLCD: displaythemeasurement value
3. The thirdrowon theLCD: displaythe measurementvalue
4. The fourthrowon theLCD: displaystates
5. Lowpowerindicator: displaywhen the batteriesdon thaveenoughpower
6. Stateindicator: “MEM”indicatingdatastore, “HOLD”indicatingdatahold,
“READ”indicating historical dataaccess.
7. Datagroupnumber

-10-
8. “max”indicatingthemaximumvaluemeasurementofactivepower,
apparent power, voltage, current.
“min”indicatingthe minimumvalue measurementofactivepower,
apparent power, voltage, current.
Inthe normal measurement state, this symbol doesn’t display.
Ⅶ. Method ofOperation
1SwitchOn/Off
Press POWER keytoswitchon,LCD display,in testmode,press
POWER keytoswitchoff. The meterwill automaticallypoweroffafter
booting 15 minuteslater (The tester won t power off automaticallyin power
energymeasurementmode). If LCD displayisdarker,maybe thebattery
voltage is too low, pleasereplacebatteries.
2Choosemeasurement mode
Press MODE keytoswitch7kindsofdifferentmode:active
power/reactivepower/apparentpower,voltage/current/powerfactor,power
energy,phaseangle betweenvoltageandcurrent, phaseanglebetween
three phasevoltage,frequency,phasesequence.Inthemodeofactive
power/reactivepower/apparentpowerand voltage/current/powerfactor,
press 1、2、3keytoswitchand displaythe corresponding powerand
voltage.
3Max and Minmeasurement
Inthe modeofactivepower/reactivepower/apparentpower
measurementandvoltage/current/power factormeasurement, long press
△keyor ▽keyfor3seconds,when “max”or “min”displayed attheright
bottomofthe LCD, itistomeasurethe maximumorminimumvalue,and
then press △keyor ▽keyfor3secondstoexitthe measurementmode
of maxand min,returntonormal measurement mode.
4Backlight Control
Afterbooting,press *keytocontrol the backlight, suitable fordim
placesand night, default closedafterbooting.
5DataHold/Storage
Inallthe modesexceptphasesequencemeasurement,press HOLD
keytolockcurrentlydisplayedvalueanddisplay “HOLD “symbol.At the
sametime,thislockedvalueasaset ofdatafollowed byauto-ID andstore,
displaythegroup numbersuchas “HOLD：0003”,and thenpress HOLD
keytocancelthe lock, “HD”symbol disappear,then continuetomeasure.
Loop operation,the metercanstore200setsofdata.Ifthe memoryis full,

-11-
display “FULL”symbol. “MEM:0003”displays intestmodemeansthere
have3groupsstoreddata.
6DataAccess/ Exit
Intest mode,press MEM keytoaccess datainquiryformgroup “READ：
001”,and display “READ”symbol.It is allowed torapidlynavigatetothe
desired page number.Press “△”keytoincreasethe pagenumberbyone,
press ”▽”keytodecreasethe pagenumberbyone.Press ””keyto
decreasethepagenumberbyten,when the pagesislessthenten,please
change tousethe ”▽”key.Press ”▷”keytoincreasethepage numberby
ten,when theleftpagesislessthanten,pleasechange tousethe “△”key.
Press MEM keytoexit dateinquiry.
7DataUpload
Connectingthe meterand computerwithUSB-RS232 communication
line attached in package.Start up the meter,run software,choosehistory
access,then read,save,report, printhistorydata,etc. The moredatastorage,
takethe longertimetoreadit.Historicaldatacan besaved in TxttextorExcel
format.Pleasedon tconnectthe testerwithcomputervia RS232 when the
testeris underthe stateofvoltagemeasurement, in caseresultin leakage
current todamage the tester.
8DeleteData
At the dateinquirymode,press CLRkeytoaccessdeletingdatamenu,
then press“”or “▷”keys tomovethe cursorto “YES”or “NO”item.Press
MENU keytoconfirmdeletion or returntothe testmode.
9Measurement Instruction
(1) Singlephase AC voltage (U1/U2/U3) measurement:

-12-
(Table-1)
Key Input（+）Input（-）Measurement
Quantity
φ1key
U1
interface
Yellow
pen COM interface
Black
pen Voltage ofthe first phase
φ2key
U2
interface
Green
pen COM interface
Black
pen Voltage ofthe second phase
φ3key
U3
interface
Red pen
COM
interface
Black
pen Voltage ofthe third phase
(a)Press MODE keytoswitchthemode tovoltage/current/powerfactor
measurementstate. (Showasthe aboveLCD display)
(b)ConnectwiresaccordingtoTable-1,press 1、2、3keytoswitchthe
phase,and insertthetesting pens(Yellow,Green,Red)into “U1/U2/U3”
interface,insert the black pen into “COM”interface.
(c)The first rowon the LCD displays the corresponding voltage.
(d)Longpress △keyor ▽keyfor3seconds,when “max”or “min”
displayed atthe rightbottomofthe LCD, itistomeasurethe maximumor
minimumvoltage.Andthen press △keyor ▽keyfor 3secondstoexitthe
measurementmode of maxand min, returntonormalmeasurement mode.
(e)Whenthevoltage exceeding600V, “OLV”symbol will display.
(2) Singlephase AC current（I）measurement
(a)Press MODE keytoswitchthemode tovoltage/current/powerfactor
measurementstate. (Showasthe aboveLCD display)

-13-
(b) Clamptheto-be-measuredwire.
(c)The second rowon the LCD displaysthe current.
(d)Longpress △keyor ▽keyfor3seconds,when “max”or “min”
displayed atthe rightbottomofthe LCD, itistomeasurethe maximumor
minimumcurrent. Andthen press △keyor ▽keyfor3secondstoexitthe
measurementmode of maxand min, returntonormalmeasurement mode.
(e)Whenthecurrentexceeding measurementrange, “OLA”symbol will
display.
(3) Singlephase AC leakage current（I）measurement
(a)Press MODE keytoswitchthemode tovoltage/current/powerfactor
measurementstate. (Showasthe aboveLCD display)
(b) Clampthelivewireand nulllineofsinglephase.
(c)The second rowon the LCD displaysthe leakage current.
(d)Longpress △keyor ▽keyfor3seconds,when “max”or “min”
displayed atthe rightbottomofthe LCD, itistomeasurethe maximumor
minimumcurrent. Andthen press △keyor ▽keyfor3secondstoexitthe
measurementmode of maxand min, returntonormalmeasurement mode.
(e)Whenthecurrentexceeding measurementrange, “OLA”symbol will
display.

-14-
(4) Three phaseleakagecurrent（I）measurement
(a)Press MODE keytoswitchthemode tovoltage/current/powerfactor
measurementstate. (Showasthe aboveLCD display)
(b) Clampthree wiresor four wiresof thethreephasetogether.
(c)The second rowon the LCD displaysthe leakage current.
(d)Longpress △keyor ▽keyfor3seconds,when “max”or “min”
displayed atthe rightbottomofthe LCD, itistomeasurethe maximumor
minimumcurrent. Andthen press △keyor ▽keyfor3secondstoexitthe
measurementmode of maxand min, returntonormalmeasurement mode.
(e)Whenthecurrentexceeding measurementrange, “OLA”symbol will
display.
(5)Singlephase activepower(P)/reactivepower(Q)/apparentpower(S)
measurement

-15-
(a)Press MODE keytoswitchthe mode toactivepower/reactive
power/apparentpowermeasurementstate.(ShowastheaboveLCD
display)
(b)ConnectwiresaccordingtoTable-1,press 1、2、3keytoswitchthe
phase,and insertthetesting pens(Yellow,Green,Red)into “U1/U2/U3”
interface,insert the black pen into “COM”interface.
(c) Clampthe to-be-measuredwire.
(d)The firstrowon the LCD displaysthecorresponding activepower,while
the secondandthirdrowrespectivelydisplays thecorrespondingreactive
power and apparent power.
(e)Longpress △keyor ▽keyfor3seconds,when “max”or “min”
displayed atthe rightbottomofthe LCD, itistomeasurethe maximumor
minimumvalues.And thenpress △keyor ▽keyfor3secondstoexitthe
measurementmode of maxand min, returntonormalmeasurement mode.
(f) Whenthe power exceeding measurementrange, “OL”symbol will display.
(g)Whenthemeasured voltage intherangeof10V-5V,and themeasured
currentintherangeof50mA-20mA,themeasurementerrorwill bedoubled.
Whenthevoltage below5Vorthe currentbelow20mA, the testerwill display
“0.00W/0.00var/0.00VA”.
(6) Singlephase powerfactor（PF1/PF2/PF3）measurement
(a)Press MODE keytoswitchthe mode toactivepower/reactive
power/apparentpowermeasurementstate.(ShowastheaboveLCD

-16-
display)
(b)ConnectwiresaccordingtoTable-1,press 1、2、3keytoswitchthe
phase,and insertthetesting pens(Yellow,Green,Red)into “U1/U2/U3”
interface,insert the black pen into “COM”interface.
(c) Clampthe to-be-measuredwire.
(d)The thirdrowon theLCD displaysthecorrespondingpower factor.
(e)Whenthemeasured voltage intherangeof10V-5V,and themeasured
currentintherangeof50mA-20mA,themeasurementerrorwill bedoubled.
Whenthevoltage below5Vorthe currentbelow20mA, the testerwill display
“PF1:0.000”.
(7) Singlephase powerenergy(W1/W2/W3) measurement
(a)Press MODE keytoswitchthe mode topowerenergymeasurementstate.
(Showasthe aboveLCD display)
(b)ConnectwiresaccordingtoTable-1,press 1、2、3keytoswitchthe
phase,and insertthetesting pens(Yellow,Green,Red)into “U1/U2/U3”
interface,insert the black pen into “COM”interface.
(c) Clampthe to-be-measuredwire.
(d)The firstrowontheLCD displaysthecorrespondingpowerenergy,while
the second rowdisplaysthemeasurementtime,withunitofmins(minutes
and seconds)when less than1hour,andhmin (hoursandminutes)when
morethan 1hour.

-17-
(e)Whenthepowerenergyexceeding measurementrange, “OL”symbolwill
display.Whenmeasuringpowerenergy,the testerwon’tpoweroff
automaticallyafter 15minutes,itcanbeusedfor100hours.Press HOLD key
tostorethe data,meanwhile the measurementis going onuntil press MODE
keytoexit. When press 1、2、3keytoswitchthe phase,the timerandthe
power energyvaluewill be cleared, restart tomeasureagain.
(f) Whenthe measured voltage inthe rangeof10V-5V,and themeasured
currentintherangeof50mA-20mA,themeasurementerrorwill bedoubled.
Whenthevoltage below5Vorthe currentbelow20mA, the testerwill display
“W1:0.0000KWh”.
(8) Phaseanglebetween voltage（U1/U2/U3）andcurrentmeasurement
(a)Press MODE keytoswitchthemodetophaseanglebetween voltageand
current measurementstate. (Showasthe aboveLCD display)
(b)ConnectwiresaccordingtoTable-1,press 1、2、3keytoswitchthe
phase,and insertthetesting pens(Yellow,Green,Red)into “U1/U2/U3”
interface,insert the black pen into “COM”interface.
(c) Clampthe to-be-measuredwire.
(d)The LCD displayscorrespondingphaseangle.Forexample,the phase
angle between U1and I isU1I:359.8°, the othertwophasehavenot connect
voltage U2,U3,soitsphaseangle display0°or360.0°(0°is samewith
360.0°).