Cargo 211091, User Manual

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211091
19
Vedpak 113_Version 2_201109
211091
18
Vedpak 113_Version 2_201109
Reception Distance and What that means
When tracing parallel circuits, you can determine if
a one wire has a stronger "Grounded Circuit Signal"
present over another wire. The wire that has a stronger
signal carries a larger current. This means the circuit
that has the stronger signal also has a lower resistance
compared to the other parallel branch. Just knowing this
information can come in handy when determining the
fault of a circuit.
Once the receiver is locked into the Short/Grounded
Circuit signal, (See: Locking the Sensitivity of Short/
Grounded Circuits") note the distance of the pick-up
area to the wire as you slowly lower it down near to the
wire. For example you will notice the receiver’s indicator
comes on about 2 inches with one wire and 3 inches
with the other wire. The wire that makes the receiver
come on 3 inches away is transmitting a stronger signal
than the circuit that makes the receiver come on only
2 inches away. That is important to know so you can
understand and determine which wire has a stronger
signal. This is why it is always recommended to isolate
your troubled circuit. Isolating your circuit insures
that you are following the correct circuit and it avoids
confusion with other parallel wires or circuits. (See:
"Isolating the Circuit").
The signal is at its strongest
when the transmitter is con-
nected exclusively through a
single wire as shown here.
Parallel circuits divide
the signal strength
Higher resistance
= Weaker signal
Lower resistance
= Stronger signal
Tracing Circuits that are Shielded
Quite often you will need to trace circuits in areas that
are shielded from the receiver. This doesn’t have to
be an impossible feat. Sometimes just a little logic
and planning can overcome many obstacles. If your
circuit enters a shielded area, consider if it may have
an exit point as well. If you receive a signal going
into a shielded area and a signal going out, you can
consider the problem not in the shielded area. Since you
found the exit point of the circuit exposing the wire is
unnecessary. If you find that the signal does not exit the
shielded area, then you might need to remove the shield
and probe further. (See: "Verify an Open Circuit").
Other wires can shield
open circuit signals
Wet carpet, metal and
even your own hand
can shield open circuit
signals
Break/Open
Wire harness probe lets you
probe between wires
Plastic harness cover