Extech Instruments CB20 User manual

USERGUIDE
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CircuitBreakerFinder/ReceptacleTester
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ModelCB20
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2CB20-EU-EN-V1.2 5/13
Introduction
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ThankyouforselectingtheExtechModelCB20.Thisdeviceisshippedfullytestedandcalibratedand,
withproperuse,willprovideyearsofreliableservice.Pleasevisitourwebsite(www.extech.com)
tocheckforthelatestversionofthisUserGuide,ProductUpdates,andCustomerSupport.
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Safety
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InternationalSafetySymbols
Thissymbol,adjacenttoanothersymbolorterminal,indicatestheusermustrefertothe
manualforfurtherinformation.
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Thissymbol,adjacenttoaterminal,indicatesthat,undernormaluse,hazardousvoltages
maybepresent
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Doubleinsulation
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SafetyNote
Removethebatteryifthedeviceistobestoredforlongerthan60days.
Cautions
Iftheequipmentisusedinamannernotspecifiedbythemanufacturer,theprotection
providedbytheequipmentmaybeimpaired.
Thisproductisdesignedforusebysuitablyqualifiedpersonnelfamiliarwithelectrical
supplysystems.
Beforeusingthisproduct,readtheseinstructionsandsafetywarnings.Failuretocomply
withthesafetywarningoruseoftheunitinamannernotspecifiedmayresultinserious
injuryordamagetoequipment.
Useindryconditions
Beforeusetestthatunitisfunctioningcorrectly.
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WARNING:Referallindicatedproblemstoaqualifiedelectrician.
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3CB20-EU-EN-V1.2 5/13
MeterDescription
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Transmitter
1. GFCITestbutton
2. ReceptacleTestCodeChart
3. TestIndicatingLED’s
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Receiver
4. BatteryCompartment
5. ON/OFF/RESETbutton
6. LowBatteryLED
7. IndicatingLED
8. SensingTip
9. BatteryCoverLatch
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Operation
FunctionalTest
Turnthereceiveronandcheckthat:
1. TheIndicatingLEDisONandRed.
2. TheLowBatteryLEDisOFF.
Ifeitheroftheseconditionsdoesnotexist,replacethebattery
Plugthetransmitterintoalivesocketandmovethereceiverscanningheadoverthefaceofthe
transmitter.Thefrequencyofthebeepingshouldbecomeveryrapidorchangetoacontinuous
tone.TheIndicatingLEDshouldturnGreenwhenthescanningheadisdetectingasignal
”hotspot”(thisisgoodpracticeforscanningsincetheindicationissimilartofindingthecorrect
circuitbreakeratthepanel.)
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4CB20-EU-EN-V1.2 5/13
SettingMaximumSensitivity
Beforeperformingascan,settheunitformaximumsensitivity.Tomaximizesensitivity:After
poweringtheunitON,holdtheunitawayfromthecircuitbreakerpanelandthenpressand
releasetheresetbuttononce.
FindingaCircuitBreaker
Thetransmitterinjectsasignalontothecircuitwhichcanbedetectedbythereceiver.The
receiverwillbeepandtheindicatingLEDwillchangefromredtogreenwhenthestrongestsignal
islocated.Thereceiversensitivityautomaticallyadjuststominimizefalseidentifications.
Pleasefollowtheinstructionsbelowverycarefullywithregardtotheorientationangleofthe
sensorheadtothecircuitbreakerarea.Failuretofollowthesedirectionsexactlycouldleadto
inconclusivetestresults;alsonotetheaccompanyingdiagramforadditionalguidance.
1. Plugthetransmitterintothesocketundertestandthe“correct”LEDswillturnon.
2. GotothecircuitbreakerpanelorfuseboxandswitchONthereceiver.TheIndicatingLED
onthereceiverwilllightredtoindicateautomaticscan.
3. Placethesensingtipincontactwiththe
faceofthecircuitbreakerorfuses.The
sensingtipmustbeflatagainstthecircuit
breakeratalltimesduringthetest.Anytilt
intheangle,inonedirectionoranother,
willaffectthesensor’sabilitytopickupthe
signal.
4. Slowlyrunthesensingtipalongtherowof
circuitbreakers.Maintainaconstantangle
tothebreakersasshown.Thefrequencyof
thebeepingwillincreasetoaveryrapidor
continuoustoneandtheLEDwillturnfrom
redtogreenwhenthereceiverencounters
thebreakerwiththestrongestsignal.
Continuethescanthroughallthebreakers.
5. Repeatthescanoftherowofbreakers.
Witheachsweepthereceiverwill
automaticallyadjustitssensitivityanddisregardweakersignals.
6. Continuescanninguntilthecorrectindication(rapidorcontinuoustoneandgreenLED)is
givenonlywhenthesensingtipisoveronebreakerorfuse.Thisisthebreakerprotecting
thecircuitthatthetransmitterispluggedinto.
7. TurntheselectedcircuitbreakeroffandthereceiverwillreverttoaredLEDdisplay.
8. Returntothetestedsocketandconfirmthatthecorrectbreakerhasbeenselectedby
checkingthattheLEDsonthetransmitterarenolongerON(powerisoff).
9. PressandHoldtheON/OFF/RESETbuttontoturntheReceiverOFF.

5CB20-EU-EN-V1.2 5/13
Tipsforautomaticscanning
Thereceiverworksbycomparingthestrengthofthesignalreceivedfromonebreakerto
thenext.Observethefollowingforbestresults.
Important:Thefirststrongsignalencounteredmaynotbethestrongestthereis.Donot
stopscanningwhenastrongsignalisfirstencountered.Itisessentialtocontinue
scanninguntilallthebreakersaretestedtoinsurethecorrectbreakerislocated.
Donotletthescanningheadwanderaround.Tooperatewell,theautomaticscanning
memoryneedsaconsistentsignal.
Keeptheredscanningheadatthesameanglerelativetothebreakerorfusesforthe
durationofthetest.
Keeptheheadincontactwiththebreakerduringeachsweeptoensureconsistencyin
theproximityoftheheadtothebreaker.
Testonlythesamesideofeachbreakerduringatest.Payparticularattentiontothis
whentestingaverticallyhungpanelwhichmayhaveneighboringbreakersmountedin
oppositedirections.
Alwaysresetthereceiver(awayfromthedistributionboard)beforechanginganytest
condition.
AlternateScanningTechniques
Duetothedifferingdesignsofcircuitbreakersitmaysometimesbeunclear
fromtheaboveprocedurewhichoftwobreakersthestrongestsignal
comesfrom,particularlyifitappearstocomefromaboundaryarea
betweentwoadjacentbreakers.Intheeventofthisoccurring,oneofthe
followingvariationsshouldenableclearidentification.
A:Resetthereceiverandscanthebreakersontheoppositesideofthe
switch.Thestrongestsignalmaybefoundatthetopofthebreaker.
B:Resetthereceiverandscanthebreakersata90°angletotheoriginal
scan.Atsomepointastrongersignalwillbefound;scanatthenew
angle.
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6CB20-EU-EN-V1.2 5/13
ReceptacleWiringTest
1. PlugtheTransmitter/Receptacletesterintotheoutlet.
2. ThethreeLED’swillindicatecircuitcondition.Thediagramlistsalloftheconditionsthatthe
CB20candetect.TheLED’sinthisdiagramrepresenttheviewfromtheGFCIbuttonsideof
thetransmitter.WhenviewingtheothersideofthetransmittertheLED’swillbeamirror
imageofthoseshownhere.
3. Thetesterwillnotindicatethequalityofthegroundconnection,2hotwiresinacircuit,a
combinationofdefects,orreversalofgroundandneutralconductors.
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ReceptacleGFCITest
1. Beforeusingthetester,presstheTESTbuttonontheinstalledGFCIreceptacle,theGFCI
shouldtrip.Ifitdoesnottrip,donotusethecircuitandcallaqualifiedelectrician.Ifitdoes
trip,presstheRESETbuttononthereceptacle.
2. PlugtheTransmitter/Receptacletesterintotheoutlet.Verifythatthewiringiscorrectas
describedabove.
3. Pressandholdthetestbuttononthetesterforatleast8seconds,theindicatorlightson
thetesterwillshutoffwhentheGFCItrips.
4. Ifthecircuitdoesnottrip,eitherthewiringisincorrect,orthewiringiscorrectandtheGFCI
isdefective.
CORRECT WIRING
GFCI TESTING IN PROGRESS
HOT ON NEUTRAL WITH HOT OPEN
HOT AND GROUND REVERSED
HOT AND NEUTRAL REVERSED
OPEN HOT
OPEN NEUTRAL
OPEN GROUND
OFF ON

7CB20-EU-EN-V1.2 5/13
BatteryReplacement

WhentheredlowbatteryLEDonthereceiverturnsonthe9Vbatterymustbereplaced.
Toreplacethebattery:
Pressdownonthebatterycoverlatchthenslidethecovertotherearandliftoff.
Replacethe9Vbattery.
Reinstallthebatterycover.
Note:ThetransmitterispoweredbytheAClineanddoesnotrequireabattery.

AllEUusersarelegallyboundbytheBatteryOrdinancetoreturnallusedbatteries
tocommunitycollectionpointsorwhereverbatteries/accumulatorsaresold!
Disposalinhouseholdtrashorrefuseisprohibited!
Disposal:Followthevalidlegalstipulationsinrespectofthedisposalofthedeviceat
theendofitslifecycle

OtherBatterySafetyReminders
Neverdisposeofbatteriesinafire.Batteriesmayexplodeorleak.
Nevermixbatterytypes.Alwaysinstallnewbatteriesofthesametype.


Pleasedisposeofbatteriesresponsibly;alwaysobservelocal,state,andfederalregulationswith
regardtobatterydisposal.

Cleaning
Wipetheexteriorsurfaceofthetransmitterandreceiverwithadampclothorcleansingwipe.
Donotusesolvents.Drythoroughlybeforeuse.




8CB20-EU-EN-V1.2 5/13
Specifications
OperatingVoltage90to120VAC
OperatingFrequency47to63Hz
Powersupply9Vbattery(receiver)
OperatingTemperature5ºCto40ºC(41ºFto104ºF)
StorageTemperature‐20oCto60oC(‐4oFto140oF)
OperatingHumidityMax80%upto31ºC(87ºF)decreasinglinearlyto50%at40ºC(104ºF)
StorageHumidity<80%
OperatingAltitude2000meters(7000ft.)maximum
WeightTransmitter:91g(3.2oz)
Receiver:136g(4.8oz)
DimensionsTransmitter:118x60x35mm(4.6x2.4x1.4”)
Receiver:196x55x36mm(7.7x2.2x1.4”)
ApprovalsULCE
ULListedTheULmarkdoesnotindicatethatthisproducthasbeenevaluated
fortheaccuracyofitsreadings.
Copyright©2013FLIRSystems,Inc.
Allrightsreservedincludingtherightofreproductioninwholeorinpartinanyform
ISO‐9001Certified
www.extech.com