50
Maintenance
and
care
Safety
inspections
Proceed
as
follows
to
perform
a
safety
check
of
the
device:
•
Check
the
protective
earth
conductor
resistance.
For
this
purpose,
connect
the
device
to
the
measuring
instrument
using
the
power
cable.
To
perform
a
measurement,
press
the
measuring
tip
to
the
screw
(measurement
point)
shown
in
Fig.
26
on
the
left
side
of
the
power
switch
(on/off
button).
The
measured
value
may
not
exceed
0.3
Ω
.
1
Measuring
point
Fig.
26
Measurement
of
leakage
current
•
After
successful
measurement,
the
device
leakage
current
must
be
measured.
Preferably,
the
differential
current
method
should
be
used.
the
device
is
in
its
operating
state.
Press
the
measuring
tip
onto
the
measuring
point
again
(
1
,
Fig.
26).
The
measured
value
may
not
exceed
0.5
mA.
•
Finally,
measure
the
insulation
resistance
using
a
test
voltage
of
500
V.
The
measured
value
may
not
fall
below
2
M
Ω
.
•
Note
down
the
measured
values.
000000-2075-933-GA-en-GB-230822
