BNC 645 - Manual (Page 9)

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same types and same rating as specified.
z Do not try to operate the waveform generator if it is damaged.
Disconnect the power from the equipment and consult the local
service representative. Return the product to Berkeley Nucleonics
Corporation service department if necessary.
1.6 Symbols and Terms
This symbol indicates hazards that may cause damages to the
instrument or even result in personal injury.
This symbol indicates high voltage may be present. Use extra
caution before taking any action.
This symbol indicates the frame or chassis terminal presented need
to be connected to the actual earth ground.
This symbol indicates “Protective Conductor Terminal”.
Underwriters Laboratories ® .
This symbol indicates earth (ground) terminal.
This symbol indicates this product complies with the essential
requirements or the applicable European laws or directives with
respect to safety, health, environment and consumer protections.