Hioki Power HiTester 3193, Instruction Manual

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Safety Notes
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CATⅡ
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.
CATⅢ
Primary electrical circuits of heavy equipment (fixed installations) connected
directly to the distribution panel, and feeders from the distribution panel to outlets.
CATⅣ
The circuit from the service drop to the service entrance, and to the power meter
and primary overcurrent protection device (distribution panel).
Measurement categories
9600, 9601 and 9602 instrument comply with CAT III (600 V or less)/ CAT
II (600 to 1000 V) safety requirements.
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.
Using a measurement instrument in an environment designated with a
higher-numbered category than that for which the instrument is rated could
result 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
carefully avoided.