3M 2220M Manuale Utente
7
Induction Method
If.you.cannot.make.a.direct.connection,.or.use.the.3M
™
.Dynatel
™
.Dyna-Coupler.
clamp.to.apply.a.locating.signal.on.the.target,.use.the.induction.method..This.
method.uses.the.internal.coil.of.the.transmitter.to.generate.a.magnetic.field..
This.is.the.least.preferred.method.of.applying.a.signal.on.a.target.conductor.
because.it.can.easily.be.picked.up.by.other.non-target.conductors.in.the.area..
However,.it.is.the.preferred.method.of.applying.a.signal.to.multiple.cables/pipes.
in.the.same.trench.
1.. .Verify.battery.level.of.transmitter.and.remove.any.cables.from.the.output.
method.uses.the.internal.coil.of.the.transmitter.to.generate.a.magnetic.field..
This.is.the.least.preferred.method.of.applying.a.signal.on.a.target.conductor.
because.it.can.easily.be.picked.up.by.other.non-target.conductors.in.the.area..
However,.it.is.the.preferred.method.of.applying.a.signal.to.multiple.cables/pipes.
in.the.same.trench.
1.. .Verify.battery.level.of.transmitter.and.remove.any.cables.from.the.output.
jack.
2.. .Position.the.transmitter.over.the.target.facility,.with.the.hinge.of.the.
transmitter.over.and.in.line.with.the.cable/pipe.path...
3.. .Align.the.Induction.Direction.arrows.on.the.transmitter.with.the.target.
conductor.
4.. Turn.on.the.transmitter.by.pressing.the.frequency.key.
5.. Select.High.Output.level.for.the.best.signal-to-noise.ratio.
Note: If nothing is plugged into the output jack of the transmitter, the
transmitter will automatically turn on the internal antennae, and 82 kHz
will broadcast in induction mode. For best results, the receiver should be
at least 40 feet (12 m) away from the transmitter to begin tracing the target
path. Attempting to trace the target close to the transmitter may lead to false
indications due to the receiver detecting the large magnetic field radiating
from the transmitter.
5.. Select.High.Output.level.for.the.best.signal-to-noise.ratio.
Note: If nothing is plugged into the output jack of the transmitter, the
transmitter will automatically turn on the internal antennae, and 82 kHz
will broadcast in induction mode. For best results, the receiver should be
at least 40 feet (12 m) away from the transmitter to begin tracing the target
path. Attempting to trace the target close to the transmitter may lead to false
indications due to the receiver detecting the large magnetic field radiating
from the transmitter.