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Symbols on Instruments
Electrical Symbols
on Instruments
The following table describes the electrical symbols that may be displayed on Life
Technologies instruments.
Symbol Description
Indicates the On position of the main power switch.
Indicates the Off position of the main power switch.
Indicates a standby switch by which the instrument is switched on to
the Standby condition. Hazardous voltage may be present if this
switch is on standby.
Indicates the On/Off position of a push-push main power switch.
Indicates a terminal that may be connected to the signal ground
reference of another instrument. This is not a protected ground
terminal.
Indicates a protective grounding terminal that must be connected to
earth ground before any other electrical connections are made to the
instrument.
Indicates a terminal that can receive or supply alternating current or
voltage.
Indicates a terminal that can receive or supply alternating or direct
current or voltage.
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