3 earth ground, 4 main power connection – INFICON XTC/3 Thin Film Deposition Controller Operating Manual User Manual

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XTC/3 Operating Manual

1.2.3 Earth Ground

XTC/3 is connected to earth ground through a sealed three-core (three-conductor)
power cable, which must be plugged into a socket outlet with a protective earth
terminal. Extension cables must always have three conductors including a
protective earth terminal.

WARNING - Risk Of Electric Shock

Never interrupt the protective earth circuit.

Any interruption of the protective earth circuit inside or
outside XTC/3, or disconnection of the protective earth
terminal is likely to make XTC/3 dangerous.

This symbol indicates where the protective earth ground
is connected inside XTC/3. Never unscrew or loosen
this connection.

1.2.4 Main Power Connection

WARNING - Risk Of Electric Shock

XTC/3 has line voltage present on the primary circuits
whenever it is plugged into a main power source.

Never remove the covers from XTC/3 during normal
operation.

There are no operator-serviceable items within XTC/3.

Removal of the top or bottom covers must be done only
by a technically qualified person.