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INSTRUCTION MANUAL

DIGITAL CLAMP METER

KEW 2055

１．Features

●

Designedtomeetinternationalsafetystandards.

 

IEC61010-1.IEC61010-031:2002&IEC61010-2-032

 

MeasurementCategory(CAT)IV600V

 

PollutionDegree2

●

Double molded main body provides comfortable



singlehandedgrip

 

●

DataHoldFunction

●

LCD Backlight function to facilitate working at

dimlylitsituations.

●

RELfunctiontoindicatemeasurementvariation.

 

(Current,voltage,Resistancemeasurement)

●

MIN/MAX functionenables easyreading ofmin &

maxvalueduringmeasurement.

●

WithContinuity&DiodeCheckFunction

●

NCV

（

Non Contact Voltage

）

Function for wiring

check.

●

600Vinputprotection.

●

Sleepfunctiontoextendbatterylife.

●

WithBarGraph,6039counts

2. Safety Warnings

This instrument has been designed, manufactured and

testedaccordingtoIEC61010:Safetyrequirementsfor

Electronic Measuring apparatus, anddelivered in

the best condition after passed the inspection. This

instructionmanual contains warningsand safety

rules which must be observedby the user to ensure

safeoperation of the instrument and retain it in safe

condition.

Therefore, readthrough theseoperating instructions

beforeusingtheinstrument.

 

WARNING

●

Read throughand understandthe instructions

contained inthis manual before usingthe

instrument.

●

Keepthemanual at handto enable quick

referencewhenevernecessary.

●

Theinstrumentistobeusedonlyinitsintended

applications.

●

U n d e r s t a n da n df o l l owa l lt h es a f e t y

instructionscontainedinthemanual.

Failure tofollow the instructions may cause injury,

instrument damage and/or damage toequipment

undertest. Kyoritsu isby no meansliable for

any damage resultingfrom the instrument in

contradictiontothiscautionarynote.

Thesymbol indicatedontheinstrumentmeansthat

theusermustrefertotherelatedpartsinthemanual

forsafe operation ofthe instrument. It isessential to

readthe instructions whereverthesymbol appears

inthemanual.



DANGER is reserved for conditions and actions

that are likely to cause serious or fatal injury.



WARNING is reserved for conditions and actions

that can cause serious or fatal injury.



CAUTION is reserved for conditions and actions

that can cause injury or instrument damage.

●

Marks listed in the table below are usedon this

instrument.

Usermustrefertothemanual.

Instrumentwithdoubleorreinforcedinsulation

Indicates that this instrument can clampon

bareconductorswhenmeasuring avoltage

corresponding to the applicablemeasurement

category,whichismarkednexttothissymbol.

AC

 DC

AC&DC

Thisinstrumentsatisfiesthemarkingrequirement

defined inthe WEEE Directive (2002/96/EC).

This symbol indicates separate collection for

electricalandelectronicequipment.

 

DANGER

●

Never make measurement on a circuit in which

voltageoverAC600Vexists.

●

Donot attempt to makemeasurementin the

presenceof flammable gasses. Otherwise, the use

of the instrument may cause sparking, whichcan

leadtoanexplosion.

●

Transformerjawtips aredesignednot toshort

the circuit under test. If equipment under test

hasexposed conductive parts,however, extra

precaution shouldbe takento minimize the

possibilityofshorting.

●

Neverattempttousetheinstrumentifitssurface

oryourhandiswet.

●

Donot exceed the maximumallowable input of

anymeasuringrange.

●

N e ve rop e nt h eB a t t e ry c ov e rd u ri n ga

measurement.

●



The instrument is to beused only in its intended

applications orconditions.Otherwise, safety

functionsequippedwiththeinstrumentdoesn



twork,

and instrumentdamageorseriouspersonalinjury

maybecaused.

●

Verify proper operation ona known source before

use ortaking actionas a result indicationof the

instrument.

●

Keepyourfingersandhandsbehindtheprotective

fingerguardduringmeasurement.

 

WARNING

●

Never attempt to make measurement if any

abnormal conditions, such as broken case and

exposedmetalpartsarefoundontheinstrument.

 

●

Do notrotate the FunctionSwitch while the test

leadsarebeingconnected.

●

Do not install substitute parts or make any

modification totheinstrument. Forrepair or

re-calibration, returnthe instrumentto yourlocal

distributorfromwhereitwaspurchased.

●

Donot try to replace the batteries if the surface

oftheinstrumentiswet.

●

Disconnect all thecordsandcables from the

object under test and poweroffthe instrument

before openingtheBattery Coverfor Battery

replacement.

●

Verify proper operation ona known source before

useortakingactionasaresultoftheindicationof

theinstrument.

●

Use appropriate personal protective equipment

such asinsulating gloves, Insulating boots, and

safetyglasses.

●

Stop using the test lead if the outer jacketis

damaged and the inner metal orcolor jacket is

exposed.



 

CAUTION

●

SettheFunctionSwitchtoanappropriateposition

beforestartingmeasurement.

 

●

Firmlyinsertthetestleads.

 

●

Disconnectthetestleadsfromtheinstrumentfor

currentmeasurement.

 

●

Do not exposethe instrument to the directsun,

hightemperatureandhumidityordewfall.

 

●

Altitude 2000m or less. Appropriate operating

temperatureiswithin0

℃

and40

℃

.

●

This instrument isn



t dust & water proofed. Keep

awayfromdustandwater.

●

Be sure to power off theinstrument after use.

Whentheinstrumentwill notbein usefora long

period,placeit in storage after removing the

batteries.

●

Use a cloth dipped in water or neutraldetergent

for cleaning the instrument. Do not use abrasives

orsolvents.

Measurement Category

To ensuresafe operationof measuring instruments,

IEC 61010establishes safety standardsfor various

electrical environments,categorized as Oto CATIV,

and calledmeasurement categories.Higher-numbered

categories correspondto electrical environments with

greatermomentary energy,so a measuringinstrument

designedforCAT III environmentscanendure greater

momentaryenergythanonedesignedforCATII.

O

:Circuits whichare notdirectly connected

tothemainspowersupply.

CAT II

:Electrical circuits of equipmentconnected

toanACelectricaloutletbyapowercord.

CAT III

:Primary electrical circuits of the

equipment connected directly to the

distribution panel,and feeders fromthe

distributionpaneltooutlets.

CAT IV

:Thecircuit from theservice dropto the

service entrance,and to the power meter

andprimaryover-currentprotectiondevice

(distributionpanel).

3. Specification

3-1. Measuring range & accuracy

(accuracyguaranteedat23

℃ ±

5

℃

.humidity45

〜

85%)

ACCurrent600A,1000AFunction

Function Measuring

Range Accuracy

600A 0-600.0A

±

1.5%rdg

±

5dgt

(50/60Hz)

±

3.5%rdg

±

8dgt

(40-400Hz)

1000A 0-1000A

DCCurrent600A,1000AFunction

Function Measuring

Range Accuracy

600A

0-600.0A

±

1.5%rdg

±

5dgt

1000A

0-1000A

ACVoltageFunction



（

Auto-ranging,Inputimpedance:approx.10M

Ω）

Range Measuring

Range Accuracy

6/60/600V 1-600.0V

±

1.3%rdg

±

4dgt(50/60Hz)

±

3.0%rdg

±

5dgt(40

〜

400Hz)

DCVoltageFunction



（

Auto-ranging,Inputimpedance:approx.10M

Ω）

Range Measuring

Range Accuracy

600mV/6/

60/600V 0-600.0V

±

1.0%rdg

±

3dgt

Resistance

（

Continuity/DiodeCheck

）

Function

Range Measuring

Range Accuracy

600

Ω

/6k/

60k/600k

Ω

6M

Ω

0-6M

Ω ±

1.0%rdg

±

5dgt

60M

Ω

6.00M-

60.00M

Ω±

5%rdg

±

8dgt

ContBuzzer 0-600.0

Ω

Thresholdvalue:60

Ω±

30

Ω



Diode Testvoltage:0-2V

Frequency/ DUTYFunction

（

Auto-ranging for

Frequency

）

Range Measuring

Range Accuracy

ACA 40Hz

−

400Hz

±

0.5%rdg

±

5dgt

ACV 1Hz

〜

10kHz

0.1-99.9%

(Pulsewidth/Pulseperiod)

±

2.5%rdg

±

5dgt

Note:Measurableinputsare:40Vrms@ACVor

60Arms@AC600A,350A@AC1000ARange

3-2. General Specification

●

Modeofoperation

 

:

Δ

∑mode

●

Display 

 

:max.6039counts



(Frequency:9999)&Bargraph

●



Over-range indication:"OL" displayed when exceeding

the measuring range. (except for AC/DCV and 1000A

Function)

●

Rangeswitching :

 

Auto-ranging/Voltage,ResistanceRange

 

Singlerange/Continuity,Diodecheckand

DUTY

●

Samplerate

:threetimespersecond

●

Functionalconstruction:

 

OFF/ACA/DCA/ACV/DCV/

Ω



●

Keys :

 

SELECT(AC/DCswitching&/

Ω

/ /),REL

Δ

,

 

Hz/DUTY,MIN/MAX,HOLD/BackLight

●

Powersource :DC3V/R03(UM-4)x2pcs

●

Lowbatterywarning

:

" "markisdisplayedat

 

2.4V

±

0.15Vorless.

●



Temperature & humidity: 23

℃ ±

5

℃

,relative humidity



accuracyguaranteed85%orless(nocondensation)

●

Operatingtemperature:0

〜

40

℃

,relativehumidity

 

&humidityrange85%orless(nocondensation)

●

Storagetemperature :-20

〜

60

℃

,relativehumidity



 

&humidityrange85%orless(nocondensation)

●

Currentconsumption:approx.12mA

●

SleepFunction:Automaticallypoweredoffinabout

 

15minafterthelastFunctionswitchoperation.

 

Pressany key or rotate the Function Switch from

OFFtoanypositiontoexitfromtheSleepstate.

●

Locationforuse

Outdooruse,Altitudeupto2000m

●

ApplicableStandards

 

IEC61010-1,61010-2-032,61010-2-033

 

MeasurementCATIV600VPollutiondegree2

 

IEC61010-031

 

EMC

：

EN61326-1

 ・

EN55022

 ・

EN61000-4-2(performancecriterionB)

 ・

EN61000-4-3(performancecriterionB)

●

RoHS

：

EN50581

●

OverloadProtection

 

CurrentRange :1200AAC/DC/10sec

 

VoltageRange :720VAC/DC/10sec

 

ResistanceRange :600VAC/DC/10sec

●

WithstandVoltage

 

6720VAC

（

TRMS50/60Hz

）

/5sec

 

(betweenJawsandelectricalcircuit/betweeninternal



 

circuitandenclosure)

●

InsulationResistance:10M

Ω

ormore/1000V

 （

betweenelectricalcircuitandenclosure

）

●

Conductorsize

 

approx.40mm

●

Dimension

 

approx.254(L)

×

82(W)

×

36(D)mm

●

Weight:approx.:310g

●

Accessories

 

 

TestLeads Model7066A/1set

 

BatteryR03

（

UM-4

）

/2pcs

 

InstructionmanualEnglish,Japanese/1pce

 

CarriyngCaseModel9094/1pcs

3-3. Function Keys

The"

●

"markshowsavailablefunctionateachRange.

DCCurrentMeasurement

HOLD SELECTZEROHz/

DUTY MAX/

MIN

ACA

●●●●●

ACV

●

-

●●●

DCA

●●●

-

●

DCV

●

-

●

-

●

Ω●●●

-

●

-

●

---

-

●

---

4. Preparation for measurement

4-1. Checking Battery Voltage

Set theFunctionSwitch toanyposition otherthan

"

OFF

".When thedisplayis clearwithout  "

BATT

" mark,

showing, batteryvoltage is enough. When the display

is blankor

 

 "

BATT

" mark isindicated,replacethe

batteriesaccordingtoSection7,BatteryReplacement.

 

CAUTION

The Sleepfeature automaticallypowers the

instrumentoffinabout 15minafterthe lastswitch

or key operation. Therefore, the display may be

blankevenwiththeFunctionSwitchsettoaposition

other than "

OFF

". Tooperate theinstrument in this

case, turn the switch back to the  "

OFF

"  position,

thentoanyotherposition,orpressanykey.Replace

the batteriesifnothingwasdisplayed afterabove

operations.

4-2. Checking Switch Setting & Operation

Confirm the Function Switch is set to the correct

position,the instrument isset to thecorrect

measurementmode,

and the Datahold function is disabled. Otherwise,

desiredmeasurementcannotbemade.

5. Measurement

5-1. AC Current Measurement

 

DANGER

●

Nevermake measurement on a circuit in which

voltage over AC600V exists to avoid getting

electricalshock.

●

Transformer jaw tips are designed not to short

the circuit under test. Ifequipment under testhas

exposedconductiveparts,however,extraprecaution

shouldbe taken to minimize the possibility of

shorting.

●

Do not make measurement with the Battery Cover

removed.

●

Disconnect the test leadsfrom the instrument for

currentmeasurement.

●

Keep yourfingersand handsbehindthe barrieron

theinstrumentduringameasurement.

(1)Set theFunction Switchto "

600A

" or"

1000A

"

position.

AChasbeenselectedbydefault;presstheSELECT

key, whenDC hasbeenselected, tochangeit to

AC.AC mark isdisplayed at theupper left onthe

display.

(2)Pressthetriggertoopenthetransformerjawsand

clampthemontotheoneconductorundertest,then

take thereading on the display. Pressing the "

Hz/

DUTY

" Key switches the indication in following

sequence.

AC Current

⇨

Hz

⇨

DUTY

Hz/DUTY

 Function requires 60A ormore at AC600A

Rangeand350AormoreatAC1000Arange.

 

CAUTION

●

Max conductorsize for KEW2055 isapprox

dia. 40mm. Duringcurrent measurement, keep

the trans former jaws fully closed.Other wise,

accuratemeasurementscannotbetaken.

5-2. DC Current Measurement

 

DANGER

●

Never make measurementon a circuitin which

voltage overDC600Vexists toavoid getting

electricalshock.

●

DonotmakemeasurementwiththeBatteryCover

removed.

●

Keepyourfingersandhandsbehindthebarrieron

theinstrumentduringameasurement.

(1)Set theFunction Switchto "

600A

" or"

1000A

"

position. AC has been selected by default; press

the SELECT key, when AC has been selected, to

changeittoDC.

DC mark isdisplayed atthe upperleft on the

display.

Barrier

O: Device which is

not directly

connected to the

mains power supply

Protectivefingerguard(Barrier)

：

Itisapartprovidingprotection againstelectrical

shock and ensuring theminimum required airand

creepagedistances.

Cap

：

UncappedconditionforCATIIenvironment

CappedconditionforCATIII/IVenvironments

TheCapshuldbefirmlyattachedtotheprobes.

Whenthe instrument and the testlead are combined

andusedtogether,whicheverlowercategoryeitherof

thembelongstowillbeapplied.

Cap

Protective fingerguard

Produktspecifikationer