Pinpointing The Fault With The A-Frame - Beha-Amprobe AF-600-EUR Manual De Usuario

When connecting to large diameter pipes and cables, it is sometimes not possible to find a suitable projection
to apply the alligator clip. If the material is ferrous, use a magnet to make contact to the line and then attach
the alligator clip to a magnet. For example: making a connection to a street lighting circuit. Usually it is
practice to connect the sheath of a lighting cable to the metallic inspection cover of a street lamp. Making a
connection to the inspection plate will induce a signal to the cable via the plate and sheath. Usually, there is
no projection on the plate on which to clip so using a magnet on the plate provides a suitable clipping point.

7.3 Pinpointing the Fault with the A-Frame

1. Remove the rubber spike covers from the A-Frame.
2. Press the On/Off button to turn the unit on.
3. Use the Left/Right indicator arrows to position A-Frame over the cable. At that point, the bar graph at the
bottom of the display will show maximum value for the test signal strength. The speaker will emit a pulsed
tone on one side of the cable and a solid tone on the other, so it is possible to locate the cable without
looking at the screen. If necessary, adjust the volume by using short presses on the speaker button
Note:
• If the spikes are not in the ground or there is only a very low signal, the 2-digit Fault Signal Level reading and
Fault Direction Compass arrow may not be visible. These are only shown when there is a valid fault find signal.
• If the position of the line is different when comparing the Left/Right position to the peak bar graph
position, there could be a distorted signal that may affect readings. Proceed with caution.
4. Start near the Transmitter. Hold the A-Frame in line with the route of the cable. Walk along the route
of the line placing the spikes of the A-Frame in the ground every two or three paces. Allow a couple of
seconds for the readings to settle before moving to the next position. Keep the A-Frame aligned with the
cable by using the Left/Right arrows.
Note: Initially, the Fault Direction Compass arrow on the display may point towards the Transmitter grounding
stake, but as you continue walking along the cable away from the Transmitter it will fluctuate or disappear. The
2-digit Fault Signal Level may also continue decreasing or disappear. This is because the A-Frame detects signals
conducted by the Transmitter ground stake and a cable fault is further along the line.
L
29
L H
29
H
7
29
L H
29
L H
.