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REVEXmax - User's Manual
4.4
Insulation resistance - Riso
The three insulation resistance tests take measurements on (500 V and 250 V):
Mains – Protective earth [M-PE]
Welding equip. output - Protective earth [W-PE] (500V, WELD variant only)
Mains - Welding equip. output [M-W] (500V, WELD variant only)
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 550 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 REVEXmax 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 REVEXmax is
connected to the IT mains.
Procedure:
Press the [6 R
500 V and 250 V.
Press one of the function keys to select the type of measuring you require (only
500 V).
If a Mains - Protective earth is measured, 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
– 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
c 2019 ILLKO, s.r.o.
] key and release it. Press the key again to toggle between
ISO
/ I
terminal.
ISO
ALT
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4 Measurements
Page 24
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