Hioki 3197, Инструкция по эксплуатации

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Safety Information
6
Measurement categories
This instrument complies with CAT III (600 V) and CAT IV (300 V) safety require-
ments.
To ensure safe operation of measurement instruments, IEC 61010 establishes
safety standards for various electrical environments, categorized as CAT II to
CAT IV, and called measurement categories. These are defined as follows.
CAT II: Primary electrical circuits in equipment connected to an AC electrical
outlet by a power cord (portable tools, household appliances, etc.)
CAT II covers directly measuring electrical outlet receptacles.
CAT III: Primary electrical circuits of heavy equipment (fixed installations) con-
nected directly to the distribution panel, and feeders from the distribu-
tion panel to outlets.
CAT IV: The circuit from the service drop to the service entrance, and to the
power meter and primary overcurrent protection device (distribution
panel).
Using a measurement i n s t r u m e n t in an environment designated with a
higher-numbered category than that for which the instrument is rated could re-
sult in a severe accident, and must be carefully avoided.
Use of a measurement instrument that is not CAT-rated in CAT II to CAT IV
measurement applications could result in a severe accident, and must be care-
fully avoided.