HT instruments М75 - Manual (Page 34)

M72 - M73 - M74 - M75
EN - 32
2. If during measurement a lower input
voltage than 110V is detected, the
instrument does not perform the test and
emits a prolonged sound to signal the
anomalous situation. The screen beside
is displayed for 5 seconds after which the
instrument displays the default screen of
RCD test
This can happen for example if the black cable is erroneously connected to the neutral
conductor instead of the phase one. If a Shuko cable is used, rotate the plug and
repeat the test
3. If during measurement the green probe is
connected to the phase conductor and
the black probe is connected to the
protective conductor, the instrument does
not perform the test and emits a
prolonged sound to signal the anomalous
situation. The screen beside is displayed
for 5 seconds after which the instrument
displays the default screen of RCD test
4. If during measurement an excessive
contact voltage is detected (higher than
50V) the instrument does not perform the
test and emits a prolonged sound to
signal the anomalous situation. The
screen beside is displayed for 5 seconds
after which the instrument displays the
default screen of RCD test
5. If during measurement an excessive
earth resistance is detected, such to
prevent the instrument from generatine
the test current, the instrument does not
perform the test and emits a prolonged
sound to signal the anomalous situation.
The screen beside is displayed for 5
seconds after which the instrument
shows the default screen related to RCD
test