International Electrical Symbols; Definition Of Measurement Categories - AEMC 8335 User Manual

1.1 International Electrical Symbols

Signifies that the instrument is protected by double or reinforced insulation.
CAUTION - DANGER! Read the User Manual.
Risk of electric shock. The voltage at the parts marked with this symbol may
be dangerous.
Refers to a type A current sensor. This symbol signifies that application around
and removal from HAZARDOUS LIVE conductors is permitted.
Refers to a type B current sensor. Do not apply around or remove from HAZARD-
OUS LIVE conductors without additional protective means (de-energizing the
circuit or wearing protective clothing suitable for high voltage work).
USB socket
The CE marking guarantees conformity with European directives and with
regulations covering EMC.
The trash can with a line through it means that in the European Union, the
product must undergo selective disposal for the recycling of electric and
electronic material, in compliance with Directive WEEE 2002/96/EC.

1.2 Definition of Measurement Categories

CAT I: Measurement category I corresponds to measurements taken on circuits
not directly connected to the network.
CAT II: Measurement category II corresponds to measurements taken on cir-
cuits directly connected to the installation.
Example: measurement for electrodomestic units, portable tools and
analogue devices
CAT III: Measurement category III corresponds to measurements on building
installations.
Example: measurement on distribution panels, cabling, etc.
CAT IV: Measurement category IV corresponds to measurements taken at the
source of low-voltage installations
Example: metering and measurements on overvoltage protection
devices.
Power Quality Analyzer Model 8335
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