7
Line Voltage Selection
The instrument may be damaged if operated with the line voltage selector set
at the wrong voltage or with the wrong fuses installed in the power entry
module. When the instrument ships from the factory, it will be programmed
for the standard AC voltage in the user’s country. To select a different operat-
ing voltage refer to the AC Operating Voltages section (Page 43).
Grounding
The line cord is a three-wire power cord for connection to the power mains
and a protective ground. The chassis is connected to the protective ground to
reduce the risk of electric shock. To avoid potential electrical shock, use only
mains that provide a protective ground.
Wheel Hazard
WARNING: The moving wheel may inflict injury. The operator should
assure the safety of personnel who may be exposed to this hazard.
Safety is important! The chopper wheel can cause injury if it is touched while
rotating. This is especially critical if you find yourself reaching into your opti-
cal set-up with the lights off. You may want to use the chopper wheel cover to
reduce the chance of injury.
Environment
The Model 3501 Optical Chopper may be operated in an ambient of 0 to 40
degrees C. It is recommended to avoid direct sunlight on the LED display.
WARNING: Hazardous voltages, capable of causing death, are present inside
this instrument. Do not operate the instrument with the covers removed.
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