3M Dynatel 2250M - Locating Active Duct Probes (Sondes); Determining ADP Depth

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Note: In order to measure the depth and current accurately, the operator must
pinpoint the target pipe or cable, and the receiver handle should be in-line with the
target path.
− WhileinDirPkmode,findthehighestSignalStrength[10].
− Lowerthetipofthereceivertotheground.Twistthereceiverleftandright
whilewatchingthesignalstrength.
− WhenthehighestSignalStrength[10]readingisdisplayed,thehandleofthe
receiverisinlinewiththetargetpipeorcable.
Occasionally,asignalwillappearonadjacentcablesorpipes.Comparetherelative
andactualcurrentreadings(valuethatisundertherelativecurrentvalueandinmA
units)overeachpathtohelpdeterminethetargetpath.Currentreadingswillbe
significantlylessontheadjacentcablecomparedtothetargetpath.
19. Astracingproceeds,rememberthatthemostpowerfulsignalisnearthetransmitter.
AsthereceivergetsfartherawayfromthetransmittertheSignal Strength[10]
decreases.Itmaybenecessarytoreadjustthegainasneededtoensurethatthereis
adequatesignalforthereceivertooperate.PresstheGain [4]upordown whenthe
Bar Graph[11]isnolongervisible(toolittlesignal)orwhentheBar Graph[11]is
closed(toomuchsignal).
20. Tracethepathuntilyoureachalogicalterminationpoint(i.e.:terminal,meter,
cabinet,etc).
11. Locating Active Duct Probes (Sondes)
1. PressOn/Off[1]onthereceiver.
2. PressLocate/OK [5].
3. PressCable/Pipe [SK].
4. PressMode [SKToggle]toselectSpecialPeak(SplPk).
5. PressFreq [SK].
6. PressActive [SKToggle]toselectthe33kHzfrequency(fora33kHzSonde
orActiveDuctProbe(ADP)).
7. PressLocate/OK [5].
8. Withthereceiverhandleperpendiculartotheconduitpath,locatetheADPposition
bymovingalongthepathuntilthestrongestsignalisfound.AdjustGain [4]upor
down whenthebargraphremainseitherfullyopenorfullyclosed.
9. RefertotheADPoperatinginstructionsforfurtherinformation.
A. Determining ADP Depth
1. PlacethetipofthereceiveronthegrounddirectlyabovethelocatedADPposition.
2. Maintainthehandleorientationperpendiculartothetargetpath.
3. PressDepth[SK]intheCableLocatedisplay.