Removal Of Oscillator Head Hold Down Brackets; Operation In Cold Weather; Oscillator Head Hold Down Brackets - Unitek Miyachi LW250 Operation, Maintenance And Service Manual

Removal Of Oscillator Head Hold Down Brackets

To fasten the base of the oscillator head during transportation, yellow hold down brackets are
attached as shown in the Figure 1-1. Remove these brackets when installing the LW250 Laser.
Retain them for future use when transporting or relocating the laser. Use of these brackets will
help to prevent misalignment and damage to the laser oscillator caused by severe vibrations.
Figure 1-1. Oscillator Head Hold Down Brackets

Operation In Cold Weather

When the temperature drops below 0°C, the water inside the LW250 Laser's cooling system can
freeze and may damage the laser. In cold regions, take special care to keep the ambient tempera-
ture where the laser is located above 0°C. If the temperature drops below 0°C, perform the pro-
cedure detailed in Chapter 7 entitled Coolant Water Draining: For Long Term Storage; When
Transporting the Laser; or When The Temperature Drops Below 0°C.
When it is cold, a rapid temperature change caused by a heating system, for example, may cause
dew condensation on the end faces of the Nd:YAG rod and on other optical surfaces. This will
attract dust and can cause damage to the surfaces of the optics. CAUTION :Avoid rapid
temperature changes.
Be sure to turn off high voltage and the laser guide beam when
checking the rod end and/or the mirror. If you do not turn them off,
you are exposed to the possibility of electric shock or blinding.
If dew condensation is suspected, check the end surfaces of the laser rod and the optics. Inspect
the rod's end surfaces by placing white paper on one end and using a dental mirror on the other
end. You will need to remove the beam path covers on both ends of the laser cavity to do this
inspection.
990-605 REV B: May, 1997
WARNING
LW250 PULSED Nd: YAG LASER
CHAPTER 1: PRECAUTIONS
L25LHDBR.WPG
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