Manual
21
5.2.2.2 Finding low-lying current circuits
For bipolar use the search depth is strictly limited if the loop / ring cable consists of core wires in cables
with multiple core wires (such as, for example, NYM 3 x 1.5 mm²), because a short distance between the
supply cable and the loop cable causes a strongly distorted magnetic field. A sufficiently strong magnetic
field cannot be established in the narrow places. If a separate loop cable is used, this problem could be
resolved easily, since a separate conductor could spread the magnetic field much more. In case of the
loop cable it may go about some type of conductive wires or cable rolls. It is important that the distance
between the supply cable and the loop cable is bigger than the depth of laying. In practice, this distance is
usually 2 m or more.
preparations:
- The circuit must be unloaded.
- Connect the transmitter as in the following figure.
- The distance between the supply cable and the loop cable must be at least 2 ~ 2.5 m.
- For this type of application the influence of moisture or mortar on the wall up to the search depth is not
important.
- The stronger the signals displayed on the Nixie Tube of the locator during the tracking of the current
circuit is, the closer to the locator the tracked cable is.
- Set the power of the transmitter in order to adjust it to different search radii.
- Select the manual mode on the receiver and the appropriate reception sensitivity to locate the current
circuit accurately.
