TESTBOY 20 Plus Bedienungsanleitung Seite 21

Acoustic continuity testing
Insert the test leads (as shown in Figure 1b). An
acoustic signal can be heard between
0 – 250 . The green
same time. If an unexpected voltage is applied
to the object being measured, the
luminate and the buzzer will issue a warning
tone! If a phase is active on one of the wires be-
ing tested, the red V~ LED will illuminate! The
Testboy 20 Plus is protected against external
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voltages of up to 300 V~ (for max. 30 seconds)!
You can carry out a continuity test while the
flashlight is on!
Cable break detection
The cable break detection is intended for non-
contact localization of cable breaks on non-ex-
posed live lines. When the metal clip located in
the back of the Testboy
live cable (> 110 V AC) starting from the feeding
point, the V~ LED will illuminate before breaking
point. No test leads need to be attached (as
show in Figure 2)! A flowing current is not re-
quired! The metal clip acts here as an extended
sensor.
Do not apply the metal clip on uninsulated haz-
ardous live conductors, which may render elec-
tric shock, electric burn, or arc flash.
The sensitivity of the electronics increases if the
metal clip is touched during the measurement.
This means that AC voltage fields can be de-
tected even at distances of several millimetres!
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Testboy 20 Plus
LED illuminates at the
light will il-
20 Plus is held over a
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Operation
Figure 1b
Figure 2
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