Automotive Short And Open Finder
12
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Electromagnetic loop size and geomet, etc. may aect the range of the V210 receiver.
For example for circuits in which the live and ground (return) wire run parallel and close
to each other in the same circuit, the two magnetic elds interaction may weaken the
signal, thereby reducing the V210 receiver range.
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Wires enclosed or tightly lining the metal frame or body of the vehicle, (i.e.: door frames),
have the same eects as having the live and ground wires running in parallel in the same
circuit since, the metal frame or vehicle body will be acting as a ground wire. Another
unfavorable factor may be due to the channeling eect steel pas have on magnetic
elds. These two cases, individually or combined, will reduce and sometimes impede the
In order to avoid confusing a shielded poion of the faulty wire with the actual fault on it,
the circuit should be checked on in several places to conrm that no signal is detected on
the other side of the suspected faulty section.
When the V210 transmitter detects a sho circuit (or closed circuit), it injects pulses of
electrical current in the wires, which generate magnetic elds. Unlike radio signals,
magnetic elds are not easily absorbed by nearby conductors and therefore can be picked
up by the V210 receiver probe sensor in a wider range of situations (See Fig. 9 as below)
2.12.2 Working with sho circuits (and tracing circuits)
2.12.3 Some circuit characteristics that may aect the tracing of a wire:
Weakened
signal
area
Other Wire
Traced wire
Steel Pa
Figure 9