International Electrical Symbols; Definition Of Measurement Categories - AEMC 6608 Manual De Instrucciones

1.1 International Electrical Symbols

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 sym-
bol may be dangerous.
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 circuits directly connected to the installation.
Example: measurement for electrodomestic units,
portable tools and analogue devices
CAT III: Measurement category III corresponds to measure-
ments on building installations.
Example: measurement on distribution panels, cabling,
etc.
CAT IV:
Measurement category IV corresponds to measure-
ments taken at the source of low-voltage installations
Example: metering and measurements on overvoltage
protection devices.
Phase & Motor Rotation Tester Model 6609
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