Replacing The Existing Flash Lamp - Unitek Miyachi LW250 Operation, Maintenance And Service Manual

Replacing the Existing Flash Lamp. This procedure, in which water is drained from
the laser chamber, is given in Chapter 8 of this manual.
Replacing Existing Deionized or Steam-Distilled Water. To replace the existing
deionized or steam-distilled water, proceed as follows:
Note: Use this procedure whenever only the coolant water is to be replaced, not when
the coolant water and the ion exchange resin cartridge are replaced at the same time.
1. Refer to Figure 7-4.
Loosen the stopper bolt
in the laser chamber
water drain hole.
Breaking the vacuum
will al-low the water in
the laser chamber and its
hose to drain into the
water tank.
2. Refer to Figure 7-2. Remove the
thumb screw on the drain pipe
clamp. Remove the drain pipe
cap. Rotate the flexible drain
pipe tube until the outlet end is
below the inlet end to drain the
water into a shallow pan, or
floor drain system.
3. Fasten the drain pipe and replace the end cap.
4. Fasten the stopper bolt in the laser chamber drain hole.
5. Remove the two thumb screws on the water tank cover, and remove the cover.
6. Fill the tank to the upper level mark with deionized water or steam-distilled water.
7. Reattach the top cover using the two thumb screws.
8. Following the Operating Instructions, run the laser for about 30 seconds, then
power it off. This will allow the laser chamber to fill with water.
9. Recheck the fill level of water in the water tank. If necessary, remove the tank
cover, add water to the upper level mark, and replace the tank cover.
990-605 REV B: May, 1997
Figure 7-4. Laser Chamber Vacuum Release
LW250 PULSED Nd: YAG LASER
CHAPTER 7: USER MAINTENANCE
STPRBOLT.PCX
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