MDtest (100-140 V) - User’s Manual
3
Putting into operation
3.2
Self-test
It can sometimes be difficult to identify if the measuring instrument does not work
properly, especially when measuring current leakage. The MDtest therefore has
built in the possibility to promptly test the basic functionality. The functionality of
the following functions can be tested:
•
Insulation resistance
•
Measurement of alternative (substitute) leakage current
•
Measurement of PE current during operation
•
Measurement of differential leakage current
WARNING
•
Disconnect DUT before the MDtest self-test!
•
This test does not substitute for calibration!
•
The MDtest has to be connected to TT or TN mains.
The test result is displayed on the display using the symbols pass / fail.
Test
proceeds as follows:
•
Disconnect the DUT.
•
Press the
[menu]
key and release it.
•
Use the
[
H
]
key to select
(Setup)
, press the
[ent]
key for confirmation.
•
Use the
[
H
]
key to select
(Self-test)
, press the
[ent]
key for confirmation.
•
Press the
[TEST]
button. The test will then start; after it is finished, the
results are displayed:
(self-test passed) or
(self-test failed).
•
The correct values are:
–
RisoM-PE: 1.000
±
0.050 MΩ
–
IaltEq: 0.100
±
0.010 mA
–
IdirEq: 0.100
±
0.010 mA
–
IdifEq: 0.100
±
0.010 mA
Contact service if the test results differ from the ones described above.
3.3
Help screens
The help screens are available in all functions. The Help screens contain schematic
diagrams for illustrating how to properly connect the instrument for electric instal-
lation, applied standards and the number of a picture according to the standard.
After selecting the measurement you want to perform, press the
[0 HELP]
(once
or repetitively) key in order to see the associated Help screens.
Press the
[0 HELP]
or
[esc]
to leave the Help.
c
2018 ILLKO, s.r.o.
www.illko.cz
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