International Electrical Symbols; Definition Of Measurement Categories - AEMC 6610 User Manual

1.1

International Electrical Symbols

This symbol signifies that the instrument is protected by double or reinforced
insulation.
CAUTION - Risk of Danger! Indicates a WARNING and that the operator
must refer to the user manual for instructions before operating the
instrument in all cases where this symbol is marked.
Important instructions to read and understand completely.
Important information to acknowledge.
Risk of electric shock. The voltage at the parts marked with this symbol may be
dangerous.
AC Alternating current
Compliance with the Low Voltage & Electromagnetic Compatibility European
directives (73/23/CEE & 89/336/CEE)
In the European Union, this product is subject to a separate collection
system for recycling electrical and electronic components In accordance
with directive WEEE 2002/96/EC
1.2

Definition of Measurement Categories

CAT II:
For measurements performed on circuits directly connected
to the electrical distribution system. Examples are
measurements on household appliances or portable tools.
CAT III:
For measurements performed in the building installation at
the distribution level such as on hardwired equipment in
fixed installation and circuit breakers.
CAT IV:
For measurements performed at the primary electrical
supply (<1000V) such as on primary overcurrent protection
devices, ripple control units, or meters.
Phase Rotation Meter Model 6610
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