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Selecting the Tracing Signal
The .choice .of .815 .Hz, .8 .kHz, .33kHz .or .82 .kHz .Frequency .is .dependent .on .the .conditions .of .
the .locate .
The .815 .Hz, .8 .kHz, .33kHz .and .82 .kHz .signals .each .have .their .advantages . .It .is .recommended .
to .begin .by .using .the .815 .Hz .signal, .and .continue .as .long .as .you .are .confident .in .the .results . .If .
the .signal .is .very .weak .try .to .adjust .the .connection .or .grounding . .If .there .is .no .improvement .in .
signal .then .try .8 .kHz . .Repeat .adjustments .of .ground .and .connection .point .again .until .switch-
ing .to .33 .kHz .and .then .82 .kHz .
815 .Hz .(lower .frequency) .signal .is .usually .preferred .to .the .8 .kHz .(mid-range .frequency) .and .
82 .kHz .(high .frequency) .signal, .because .it .is .much .less .susceptible .to .locating .errors .caused .
by .nearby .cables .or .pipes . .The .815 .Hz .locating .range .is .also .much .longer .than .the .82 .kHz .
signal . .The .815 .Hz .signal .will .not .travel .well .through .disconnected .shield .bonds .or .insulated .
pipe .bushing . .
8 .kHz .and .33kHz .takes .the .best .of .both .high .and .low .frequency . .This .mid .range .frequency .is .
not .very .susceptible .to .bleed .off .or .coupling, .but .it .can .jump .impedance .on .the .utility .better .
than .the .815 .Hz . .It .is .still .best .to .use .815 .Hz, .but .8 .kHz .is .one .of .the .most .common .frequencies .
used .to .locate .coaxial .cable .and .telecom .pairs .
The . 82 . kHz . (higher . frequency) . is . sometimes . better . than . the . 815 . Hz . (lower . frequency) . for .
locating .sharp .corners .in .cables .or .pipes . .The .82 .kHz .signal .is .also .better .for .“jumping” .discon-
nected .shield .bonds .or .grounds, .or .tracing .signal .may .indicate .one .of .these .characteristics . .
The .locating .range .is .quite .short .for .the .82 .kHz .signal .so .the .
T
ransmiTTer
.must .be .repositioned .
more .often .during .the .tracing .operation . .This .
Frequency
.is .also .useful .for .applying .a .signal .using .
the .
F
lexicoupler
or
THe
H
ard
c
oupler
.
.