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Safety Information
Measurement categories
IEC 61010 defines measurement categories to facilitate safe use of measuring instruments. Test
and measurement circuits designed to be connected to a main power supply circuit are classified
into three categories depending on the type of main power supply circuit.
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.
Measurement
category II
(CAT II)
Applicable to test and measuring circuits connected directly to utilization points
(socket outlets and similar points) of a 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 fixed
installation.
Measurement
category III
(CAT III)
Applicable to test and measuring circuits connected to the distribution part of the a
building’ s low-voltage MAINS installation.
Example: Measurements on distribution boards (including secondary meters),
photovoltaic panels, circuit breakers, wiring, including cables, bus-bars,
junction boxes, switches, and socket outlets in a fixed installation, as
well as equipment for industrial use and some other equipment such as
stationary motors with permanent connection to the fixed installation.
Measurement
category IV
(CAT IV)
Applicable to test and measuring circuits connected at the source of the a building’ s
low-voltage MAINS installation.
Example: Measurements on devices installed before the main fuse or circuit breaker
in the building installation.
Outlet
CAT II
Interior wiring
Service entrance
Service drop
CAT IV
Power meter
CAT III
Distribution panel
Fixed equipment
HIOKI BT5525A961-00
Содержание BT5525
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Страница 48: ...48 Notifying the Judgment Result and Test Completion with a Beep HIOKI BT5525A961 00 ...
Страница 76: ...76 Initializing the Instrument Reset HIOKI BT5525A961 00 ...
Страница 82: ...82 Deleting Panel Data HIOKI BT5525A961 00 ...
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