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26 GMC-I Messtechnik GmbH
11 Leakage Current Measurement
Select the I
xx
measurement and start.
Each time line voltage is applied to the
test socket, L and N are reversed, if this
function has been selected in the leak-
age current menu (see chapter 11 on page 26).
Attention:
Leakage Current Measurement
During leakage current measurement it is imperative to ensure that the de-
vice under test is operated at line voltage. Exposed conductive parts may
be charged with hazardous contact voltage during the test and may con-
sequently not be touched under any circumstances. (There is a power
shutdown as soon as the leakage current is higher than approx. 10 mA).
Frequency response is
taken into consideration
in accordance with the
digram to the right when
leakage current is mea-
sured.
11.1 Earth Leakage Current I
PE
(Feature KA01)
Current which flows from the power pack over the insulation to the
protective conductor, and thus to earth.
Attention!
!
The protective conductor is disabled during this measurement.
11.2 Contact Current
Current which flows from housing
parts which are not connected to
the protective conductor via an
external conductive connection
to earth or another part of the
housing. Flow of current via the
protective conductor is excluded
in this case.
The AC component is mea-
sured. The DC component can
also be measured if individual
measurement is performed (in-
stead of a test sequence).
EN 60601/VDE 0751: The following sequence is programmed for measuring
and documenting several exposed conductive parts:
If the acoustic signal chain changes from long to short intervals, it means
that measurement is completed and the next measuring point can be se-
lected and scanned (key ).
If each measured value is to be recorded (printed), it can be done by
pressing the key after each measurement (on condition that „Direct
print-out“ is activated, see chapter 18).
I leakage
10 10
2
10
3
10
4
10
5
10
6
+20
0
–20
–40
–60
Frequency (f) in Hz
Relative Magnitude (dB): 20 log
U(f)
U(f=10)
μΑ
2
3
L
N
1 Test socket (w/o protective conductor contact)
2 Patient connector cable
(insulated application part)
3 Device housing
1
26


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