User Manual

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Safety Notes
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DANGE
R
Indicates that incorrect operation presents an extreme hazard that
could result in serious injury or death to the user.
WARNIN
G
Indicates that incorrect operation presents a significant hazard that
could result in serious injury or death to the user.
CAUTIO
N
Indicates that incorrect operation presents a possibility of injury to
the user or damage to the instrument.
NOTE
Advisory items related to performance or correct operation of the
instrument.
Conventions used in this manual
The following symbols in this manual indicate the relative importance of
cautions and warnings.
Measurement categories (Overvoltage categories)
This instrument complies with CAT safety requirements.
To ensure safe operation of measurement instruments, IEC 61010 establishes
safety standards for various electrical environments, categorized as CAT
to
CAT
, and called measurement categories. These are defined as follows.
CAT
: Secondary electrical circuits connected to an AC electrical outlet through
a transformer or similar device.
CAT
: Primary electrical circuits in equipment connected to an AC electrical
outlet by a power cord (portable tools, household appliances, etc.)
CAT
: Primary electrical circuits of heavy equipment (fixed installations)
connected directly to the distribution panel, and feeders from the
distribution panel to outlets.
CAT
: The circuit from the service drop to the service entrance, and to the
power meter and primary overcurrent protection device (distribution
panel).
Higher-numbered categories
correspond to electrical
environments with greater
momentary energy. So a
measurement device designed
for CAT
environments can
endure greater momentary
energy than a device designed
for CAT
.
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.
Never use a CAT
measuring instrument in CAT , ,or environments.
The measurement categories comply with the Overvoltage Categories of the
IEC60664 Standards.