Safety
AVTMTO3XX Rev 3 Sept 2013
9
F
WARNING
No user serviceable parts inside! Refer all
servicing to the factory or a qualified authorized
service company!
F
CAUTION
Use only factory supplied mains cord! Mains
cord shall not be substituted!
Input Power Precautions
This instrument operates from a single-phase, sine wave, power source. It has a
three-wire power cord and requires a two-pole, three-terminal (live, neutral, and
ground) type input source. The voltage to ground from the live pole of the
power source must be within the following rated operating voltage:
For Cat. No MTO3XX: 120/230 V 10%, single-phase sine, 48 to 62 Hz
The neutral pole must be at ground potential. Before making connection to the
power source, determine that the instrument rating matches the voltage of the
power source. The power input plug must be inserted only into a mating
receptacle with a ground contact.
F
WARNING
Do not bypass the grounding connection. Any interruption of the
grounding connection can create an electric shock hazard.
Determine that the receptacle is properly wired before inserting
the plug.
The control circuits of the instrument are protected by two mains circuit fuses.
These fuses are located in the ON/OFF switch module and are replaceable by
the operator. Please consult the manufacturer for proper replacement fuses to
avoid electric shock and fire hazard. A detailed procedure for Fuse Replacement is
defined in Section 7 - Service.
F
WARNING
Before replacing the fuses, disconnect the
power input plug from the live power source.
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