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Safety Information
Measurement categories
To ensure safe operation of measuring instruments, IEC 61010
species the measurement categories, which classies testing and
measuring circuits into three categories according to the types of
mains circuits to which they are intended to be connected.
DANGER
Do not use a measuring instrument for
measurements on a mains circuit that
exceeds the range of the measurement
category rated for the instrument.
Do not use a measuring instrument
without a measurement category rating for
measurements on a mains circuit.
Failure to observe this can cause a serious bodily injury
and damage to the instrument and other equipment.
This instrument conforms to the safety requirements for CAT III
1000 V, CAT IV 600 V measuring instruments.
Measurement category II (CAT II)
Applicable to test and measuring circuits connected directly to
utilization points (socket outlets and similar points) of the low-
voltage mains installation.
EXAMPLE: Measurements on household appliances, portable tools,
and similar equipment, and on the consumer side only
of socket-outlets in the xed installation.
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