Single-Pole Phase Test; Voltage Test With Rcd Trip Test - Unitest 2000 alpha Bedienungsanleitung

For DC voltage, the polarity of the voltage dis-
played refers to the instrument test probe (+).
Due to technical reasons the instrument cannot
effectuate an automatic switch-on for DC voltages
within the range of approx. 0V to -3V.

4.3 Single-pole Phase Test

" To carry out single-pole phase tests always touch
the contact electrode (11).
" The single-pole phase test starts at an AC voltage of
approx. 100V (pole > 100V AC).
" When using single-pole phase tests to determine
external conductors the display function may be im-
paired under certain conditions (e.g. for insulating
body protective equipment on insulation locations).
"The single-pole phase testing is not appropriate to
determine whether a line is live or not. For this pur-
pose, the double-pole voltage test is always re-
quired.
" Connect instrument test probe to UUT.
A signal sound indicates the phase.
The LED (5) is illuminated in the display.

4.4 Voltage Test with RCD Trip Test

During voltage tests in systems equipped with RCD cir-
cuit breakers, a RCD switch can be tripped at a nominal
residual current of 10mA or 30mA by measuring the
voltage between L and PE.
The RCD trips.
To avoid RCD tripping a test has to be carried out be-
tween L and N during approx. 5s. Immediately after-
wards, voltage testing between L and PE can be carried
out without RCD tripping.
Carrying out Measurements
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