UT25CL User Manual
17
field generated around the conductor by the signal produced by the transmitter (the electromagnetic
field is detected by the receiver). The clearer the signal, the easier the cable can be tracked. Connect
the transmitter with two adjacent conductors of the same circuit (i.e., the live and neutral wires of
Romax cable), the signal is transmitted through the first conductor in a direction, and then returns
through the second conductor (opposite direction), thus the two opposite-direction electromagnetic
fields around adjacent conductors counteract mutually. The electromagnetic fields in opposite
directions mutually counteract partially or wholly, which leads to difficulty in tracking cable, or even
inability to track. As shown in the figure below:
To avoid the counteraction effect, independent grounding shall be employed. The red test lead of
the transmitter shall be connected to the live wire of the circuit tracked, and the black to the
independent grounding, i.e., water pipe, grounding spike, metal structure of building, or grounding
connection of outlet at other circuits. Please note that the independent grounding is not the
grounding end of any outlet at the circuit to which the measured conductor belongs. If the live wire
is energized and the transmitter is connected to the independent grounding correctly, the LCD of the
transmitter will display the AC or DC symbol of corresponding voltage and power supply (For DC,
the polarity “+” or “-“ will be displayed). For independent grounding, the electromagnetic fields
around live wire are not counteracted by the opposite-direction signal of the loop of adjacent
conductors (live or neutral wire), and the signal is transmitted through independent grounding,
therefore, the intensity of the signal generated is the strongest.
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