Triplett Fox 2 – PN: 3382 - Manual (Page 35)

35
For the most accurate simulation, lay out a serpentine pat-
tern on the floor similar to that in a ceiling, and try to locate
an open using the nulling and the grounding technique. Have
an assistant position the open fault while you are out of the
room, and then cover the wire with cardboard, newspaper,
plywood, etc..... and see if you can find the open. You’ll prob-
ably find that the open is sometimes found in the wrong
place. Notice what wire configuration causes this to happen
and experiment with the nulling and grounding techniques
to see if a method can be figured out that will work in these
situations.
To test the actual resistance heating circuit, disconnect the
ends of the heating wires from the power source. This can
usually be done at the thermostat that controls the room.
Attach the clips of the FOX 2 to the wires (one clip to each
wire) and use the nulling and grounding techniques dis-
cussed above, and any other methods learned from your ex-
periments, to find the open fault.
Cars:
Wires can be traced in cars or similar metal bodied vehicles
using the grounded method. The metal body of the car acts
as a ground, and as a shield. This means that, compared to
tracing in a wood frame structure, it will be necessary to
place the HOUND or HOUND 2 closer to the target wire to
pick up a tracer tone.
Connect one clip of the FOX 2 to the metal chassis of the car,
and the other clip to the wire to be traced. As in other appli-
cations, the far end of the wire must be disconnected from