Hioki PD3259-50, Instruction Manual

Page: 14 / 86

8
Safety Information
Measurement categories
To ensure safe operation of measuring instruments, IEC 61010
specifies the measurement categories,which classifies 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. Failure to observe this can cause a
severe accident.
• Do not use a measuring instrument without a
measurement category rating for measurements on
a mains circuit. Failure to observe this can cause a
severe accident.
This instrument conforms to the safety requirements for CAT IV 600 V
measuring instruments.
CAT II: Applicable to test and measuring circuits connected directly to
utilization points (socket outlets and similar points) of the low-
voltage mains installation.
CAT III: Applicable to test and measuring circuits connected to the
distribution part of the building’s low-voltage mains installation.
CAT IV: Applicable to test and measuring circuits connected at the source of
the building’s low-voltage mains installation.
T
Outlet
CAT II
Internal wiring
Distribution panel
Service entrance
Service drop
CAT IV
Power meter
CAT III
Fixed installation
HIOKI PD3259C961-00