Locating Of Line Interruptions - Amprobe AT-2032 Manual De Instrucciones

Locating of line interruptions

Example 3 (one-pole application)
NOTE:
By touching the contact electrode „7" the sensitivity range is increased to factor 1.5.
Tracing depth approx. 0 . . . 40 cm.
Requirements:
1) The circuit must be dead.
2) All lines which are not required must be conneted to the auxiliary ground in
accordance with figure 3.
3) Connect transmitter to one lead and to an neutral according to figure 3.
4) Carry out this example as described in the application example.
The ground connected to the transmitter can be earth from an earthed socket or a water
pipe which is properly earthed, the extra leads which are not required can be connected to
this ground, too.
When tracing line interruptions in multicore cables, not that all remaining leads in the plastic-
sheathed cable or conductor must be grounded in accordance with the regulations. This is
required to avoid crosscoupling of the fed signal (by a capacitive effect to the source
terminals). The tracing depth for sheathed cable and conductors are different, as the
individual leads in the sheathed cable are twisted around themselves. The transition resistance
of a line interruption must be higher than 100kOhm. The verification of resistance can be
carried out by any multimeter.
Systematically circle round the interruption by changing the sensitivity
Line interruption in the plastic-sheathed cable.
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