Safety Information
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付録
索引
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Measurement categories
This instrument and 9750-01, -02, -03, -11,
-12, -13 TEST LEAD comply with CAT IV
(600 V), CAT III (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.
These are defined as follows.
Using a measurement instrument in an
environment designated with a higher-num-
bered 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 measure-
ment applications could result in a severe
accident, and must be carefully avoided.
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 mea-
suring electrical outlet receptacles.
CAT III Primary electrical circuits of heavy equipment (fixed in-
stallations) connected directly to the distribution panel,
and feeders from the distribution panel to outlets.
CAT IV The circuit from the service drop to the service entrance,
and to the power meter and primary overcurrent protec-
tion device (distribution panel).
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