Gossen MetraWatt 702 - Manual (Page 30)

30 GOSSEN METRAWATT GMBH
11.5 Testing Devices in Accordance with DIN VDE 0701, Part 240
Testing safety class I and II data processing equipment and office machines as
individual devices and in combination with one another.
The following measurements can be performed in accordance with the
above mentioned standard:
• Protective conductor R
PE
(permanent connection or with plug)
Test current: DC ±200 mA
• Housing leakage current I
• According to DIN VDE 0701, part 240, the device protective conduc-
tor must be tested after maintenance, repair or modification of data
processing equipment and office machines, and exposed, conductive
parts must be tested for the absence of voltage. This applies to:
• Safety class I devices for all exposed, conductive parts which are
accessible to the user, and which are not connected to the protective
conductor
• Safety class II devices (totally insulated devices) for all exposed,
conductive parts which are accessible to the user
with the mains plug poled in both directions
Setting Up the Test Sequence
See chapter 11.4 regarding the test sequence.
Special Parameters
Combined Testing
Safety class I and II devices can be tested individually or in
combination. All protective conductor connections are tested
first for interconnected safety class I devices, and then – as is
also the case for interconnected safety class II devices – all
exposed, conductive parts.
Connecting the Device Under Test
➭ Connect the test instrument and the DUT as described below:
– Connect both devices to separate mains outlets.
The outlets to which the test instrument and the safety class I DUT
are connected must share a common protective conductor!
– Or connect the test instrument to the mains and the DUT to the
test socket at the test instrument.
Data Processing / Office Machines
Permanently connected or with plug
To test socket at the instrument
The requirement for testing with the mains
plug poled in both directions can be fulfilled
by connecting the DUT to the test
socket at the instrument, and by
activating mains polarity reversal under
“Sequence” in the setup menu. Each
time the key (14) is activated, phase
conductor L and neutral conductor N
are reversed at the test socket.
Attention!
!
Testing with mains polarity reversal or with the mains plug poled
in both directions results in interruption of supply power to the
affected data processing equipment or office machine. This test
may thus only be conducted with the consent of the operator of
the data processing equipment or office machine.
If the DUT is defective, the electrical system’s RCCB may be
tripped during testing which would also result in interruption of
supply power to the affected equipment or office machine.
The manufacturer of the test instrument assumes no liability for
loss of data or other damage which results from use of the test
instrument.