Operating Precautions
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• The maximum rated voltage between input terminals
and ground is 600 V AC (150 V AC for model IR4030).
Attempting to measure voltages exceeding 600V AC
(150 VAC for model IR4030) with respect to ground
could damage the instrument and result in personal
injury.
• 1000 V or 600 V may be labeled depending on the sup-
plied test leads, but this is the rating of the test lead
and not the rating performance of the IR 4000series.
Please refer to the Specifications for the rating perfor-
mance of this instrument.
• Before attaching to or removing the test lead from the
instrument, please remove the Test Lead from the
tested objected and turn the function selector to OFF.
• Test leads should only be connected to the secondary
side of a breaker, so the breaker can prevent an acci-
dent if a short circuit occurs. Connections should never
be made to the primary side of a breaker, because
unrestricted current flow could cause a serious acci-
dent if a short circuit occurs.
• Please only use batteries for electrical supply. Any
other electrical supply may damage the instrument and
tested object and cause electric shock.
• Touching any of the high-voltage points inside the
instrument is very dangerous. Do not attempt to modify,
disassemble or repair the instrument; as fire, electric
shock and injury could result.
• To avoid electric shock when measuring live lines, wear
appropriate protective gear, such as insulated rubber
gloves, boots and a safety helmet.
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