MDtest (100-140 V) - User’s Manual
4
Measurements
•
Do not touch the exposed conductive parts of the tested appliance
while measurement is in progress –
RISK OF ELECTRIC
SHOCK!
•
Do not disconnect the test leads while measurement is in progress
or immediately after finishing the measurement. The capacitive
component of the tested appliance can be charged to a voltage
of up to 300 V; after the
[TEST]
key is released, this voltage is
automatically discharged.
•
Make sure the tested appliance is de-energized – its mains voltage
must be disconnected before the start of the measurement!
•
Before measuring resistance, the MDtest device checks if the
DUT is de-energized. If so, then an acoustic signal sounds and
the display shows a warning message
(Interference voltage at
the input)
.
•
Resistance measurement is also possible if the MDtest is con-
nected to the IT mains.
Procedure:
•
Press the
[6 R
ISO
]
key and release it.
•
Press one of the function keys to select the type of measuring you require.
•
Connect the appliance for testing:
–
For a one-phase appliance with a movable power supply cord – plug in
its mains plug to Test Socket
1
.
–
For a three-phase appliance with movable power supply cord – connect
the PE pin of its plug to the instrument’s
PE
terminal by means of
the optional test lead + crocodile clip.
Then connect the remaining
current-carrying conductors by means of the test lead + test tip to the
instrument’s
R
ISO
/
I
ALT
terminal.
–
For a hard-wired appliance –
first disconnect the appliance from
the mains!
Connect the point of the PE connection to the instrument’s
PE
terminal by means of the optional test lead + crocodile clip. Then
connect the remaining current-carrying conductors by means of the test
lead + test tip to the instrument’s
R
ISO
/
I
ALT
terminal.
•
If an applied part is measured, plug it into the
PAT
terminal.
•
Switch on the tested appliance’s mains switch.
•
Press the
[TEST]
key. It is recommended that you hold the
[TEST]
key
down for 5-10 seconds (or even longer if the displayed result is not stabilized);
the influence of the tested appliance’s internal capacitance can be eliminated
by this method.
•
After finishing the measurement the last measured value is displayed.
c
2018 ILLKO, s.r.o.
www.illko.cz
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