B-70315EN/02 SAFETY PRECAUTIONS
s-5
1.3 WARNINGS AND CAUTIONS ON MAINTENANCE
WARNING
1 A high voltage of 3 to 4 kV
0-p
is applied to some places in
the laser oscillator cabinet. Therefore, do not turn the
power to the oscillator on or operate the oscillator when an
oscillator panel is open. Operating the laser oscillator with a
panel open can cause a touch on a high-voltage place,
resulting in electric shock.
2 Before daily inspection, the replacement of a maintenance
part or maintenance, open the main circuit breaker and turn
the power supply off (double power-off).
To prevent the power from being inadvertently turned on,
lock the circuit breaker open, and affix an indication of work
in progress. Before turning on the power during
maintenance if absolutely necessary, take measures for
safety.
3 The gas circulating system in the oscillator becomes very
hot.
Do not touch the gas pipes, turbo blower, heat exchanger,
or exhaust pump, until they have cooled down sufficiently
after the oscillator has been turned off. Otherwise, you may
be burnt.
4 The oscillator contains cooling fan units. Although the fan
units are fitted with a finger guard, to prevent injury, keep
your hands well away from the fans.