Extech Instruments 2 CB20-EU-EN-V1.2 5/13 Manual

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5 CB20-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.

