Checking Coaxial Cables; Modular Test (Adapter); Maintenance - Testboy TB 27 Digital Manual De Instrucciones

Operation
Example of use 2:
If a break in the guide/limiting wire for automated lawnmowers (Automower) is to be located, then
the following procedure is recommended:
Connect the red lead of the TB 27 digital transmitter (1) to one end of the lead to be tracked.
The black lead is now connected to an earth rod. Now put this earth rod into the earth, but not
directly next to the red lead (if required, use the earth rod wire from the Testboy Accessories for
this). Inadvertent direct contact should be avoided.
If there is a break in the lead the signal should become significantly louder than before. Reducing
the sensitivity on the receiver makes it possible to locate the break more accurately. If the
displayed range is still too big you should slightly reduce the output signal on the transmitter.
This refines the area more and more and can be isolated to a few cm.
A single wire from a cable can be found with the TB-27 digital.
When searching for a line using the cable detector, the various field strengths of the tone signal
could result in the incorrect or multiple lines being found. The cable detector could receive the
tone signal of a different line not connected to the TRANSMITTER. A weak field strength could
result in the cable detector not detecting the correct line. Tone detection can be influenced by
different factors, including:
● Screened lines/wires
● The thickness and type of insulation
● Distance from the source of sound
● Fully-isolated consumers that prevent effective earthing
● The routing of the cable network
● The condition of the test instrument and its batteries

Checking coaxial cables

In order to check coaxial cables, connect the red cable to the screening of the cable and the black
cable to the internal conductor.

Modular test (adapter)

All the necessary checks can be performed using the adapter (e.g. RJ11 or RJ45 plug to check
a telephone line or a twisted cable).

Maintenance

With the exception of the battery, the Testboy ® TB 27 Digital is maintenance-free.
®
Testboy TB 27 Digital 17