Testboy 20 PLUS, Operating Instructions Manual, Page: 29 / 160

Operation
Testboy
®
20 Plus 29
ENG
L
IS
H
WARNING
Exercise caution at voltages above 30 V, as there is a
risk of electric shock.
WARNING
The non-contact cable break detection function is not
suitable for the detection of hazardous line voltage.
CAUTION
Before touching conductive parts the absence of haz-
ardous voltage must be checked with the two-pole di-
rect contact measurement of other equipment.
Single-pole phase searching
Plug a test lead in the COM port (as
shown in Figure 3).
Before the test, make absolutely sure
to disconnect all other test leads.
Then touch the probe tip to the wire.
Be sure not to touch the clip attached
to the back side (move to up position).
If a phase is active, the V~ LED will il-
luminate!
The sensitivity of the electronics in-
creases if the metal clip is touched
during the measurement. This means
that AC voltage fields can be detected
even at distances of several millime-
tres!
Figure 3