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78-8130-6150-0-F 35

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.

3M Dynatel 2250M User Manual

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