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Lake Shore Model 620/622/623/647 Magnet Power Supply User’s Manual

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viii

SAFETY SYMBOLS

Direct current (power line).

Alternating current (power line).

Alternating or direct current (power line).

Three-phase alternating current (power line).

Earth (ground) terminal.

Protective conductor terminal.

Frame or chassis terminal.

On (supply)

Off (supply)

Equipment protected throughout by

double insulation or reinforced

insulation (equivalent to Class II of

IEC 536 - see annex H).

Caution: High voltages; danger of

electric shock. Background color:

Yellow; Symbol and outline: Black.

Caution or Warning - See

instrument documentation.

Background color: Yellow; Symbol

and outline: Black.

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