GMC-I Messtechnik GmbH
7
Figure 3.18: Example: Waiting Time for Measuring Selective
RCDs
3.4.3
Tripping Current I
➭
Select the
I
function by pressing the
FUNC
key.
➭
Set residual current with the
I
N
key.
➭
RCD type is selected with the
TYPE
key.
Figure 3.19: Settings for the Tripping Current Measurement
➭
Connect the instrument to L and PE downstream from the
RCD as shown in figure 3.13section "Connection Example".
➭
After voltage value U
L-PE
settles in, briefly press the
START
key
to trigger the measurement.
After the measurement has been completed, the results are dis-
played as follows:
Uc (touch voltage) … touch voltage value
➭
Remove the test instrument from the RCD under test.
3.5
Further Device Functions
Phase Detection
If the symbol shown at the right appears in the lower right-
hand corner of the display, and if a phase is contacted with
the fixed test probe, the symbol is changed:
The other test probe may not be connected anywhere or make
any contact at all!
Note
As usual, the test instrument must be gripped in the hand!
Phase voltage to earth must be
190 V at 45 to 65 Hz – dis-
played results are otherwise not reliable.
Querying the Firmware Version
Before querying the firmware version, disconnect both test
probes from the device under test / measuring circuit, and switch
the test instrument off.
➭
Press and hold the
FUNC
key while switching the test instru-
ment on by pressing and holding the
START
key.
The firmware version appears at the display.
➭
The display is returned to the standard menu when the
FUNC
key is released.
3.6
Device Reset Function
If the test instrument does not function as described in these
instructions, we recommend a device reset. The test instrument
must be switched off and neither of the test probes may be con-
nected to a DUT. If device functions are still incorrect after switch-
ing the instrument back on again, remove the batteries as
described in section 5.1 on page 9, wait at least 10 seconds and
then reinsert the batteries (or replace them with new ones).
If the test instrument still does not function as described, remove
the batteries and contact our service department (see section 6).
Figure 3.20: Tripping Current
Measurement
Results
Figure 3.21: Example: RCD is
Not Tripped
Figure 3.22: No Phase Voltage Figure 3.23: Phase Voltage
X
L
