Measurement Category; Measurement Category Definition - Agilent Technologies U1253B User's Manual And Service Manual

7 Specifications

Measurement Category

Measurement category definition

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The Agilent U1253B True RMS OLED Multimeter has a safety
rating of CAT III 1000 V/ CAT IV, 600 V.
Measurement CAT I
which are not directly connected to the AC mains. For
example, measurements on circuits not derived from the AC
mains or specially protected (internal) mains- derived
circuits.
Measurement CAT II
that are directly connected to a low voltage installation. For
example, measurements on household appliances, portable
tools and other similar equipment.
Measurement CAT III
building installations. For example, measurements on
distribution boards, circuit- breakers, wiring (including
cables), bus- bars, junction boxes, switches, socket outlets
within the fixed installation, equipment for industrial use
and equipment that is permanently connected to the fixed
installation such as stationary motors.
Measurement CAT IV
source of the low- voltage installation. For example,
measurements on electricity meters, primary over- current
protection devices and ripple control units.
are measurements performed on circuits
are measurements performed on circuits
are measurements performed on
are measurements performed at the
U1253B User's and Service Guide