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Table 1
Safety Symbols and Markings
Safety symbols
Warning: risk of electric shock.
Caution: refer to accompanying documents.
Alternating current.
Both direct and alternating current.
Earth (ground) terminal
Protective earth (ground) terminal
Frame or chassis terminal
Terminal is at earth potential. Used for measurement and control
circuits designed to be operated with one terminal at earth potential.
Switch setting indicator. O = Off, | = On.
Standby (supply); units with this symbol are not completely
disconnected from ac mains when this switch is off. To completely
disconnect the unit from ac mains, either disconnect the power cord, or
have a qualified electrician install an external switch.
Regulatory Markings
The CE mark is a registered trademark of the European Community.
The CSA mark is a registered trademark of the Canadian Standards
Association.
The C-tick mark is a registered trademark of the Spectrum Management
N10149
Agency of Australia. This signifies compliance with the Australian EMC
Framework regulations under the terms of the Radio Communications
Act of 1992.
ISM 1-A
This text indicates that the product is an Industrial Scientific and
Medical Group 1 Class A product (CISPR 11, Clause 4).
Safety and Support Information
5
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