PerkinElmer AVIO 200, Hardware Manual

Page: 208 / 309

Maintenance
206
9. If the window is dirty clean it by following the procedure Cleaning the Windows
on page 206.
10. If the window is damaged, replace with a new radial purge window (Long Radial
Purge Window B0810377 or Short Radial Purge Window N0690672).
11. Return the new radial purge window in the stainless steel ring to the instrument.
12. Carefully screw it into place.
13. Use the tool to tighten down the stainless steel ring and radial purge window into
place.
14. Return the Shear Gas Nozzle. See Returning the Shear Gas Nozzle on page 209.
15. Turn on the plasma.
Cleaning the Windows
1. Rinse the windows thoroughly with deionized water.
2. To remove more stubborn marks:
Soak the windows in warm, 40°C, 10-20% nitric acid for one hour.
Rinse the windows thoroughly with deionized water.
3. Dry them with an optical-quality cloth.
4. If the windows are scratched or badly etched, discard them and install new ones.
Note
Do not rub the surfaces of the windows before you have cleaned them as
described below. The more you rub the surface of the windows, the more
chance there is of scratching them. You must discard scratched windows.
Allow to dry completely before reinstalling. If there is any moisture on the
inside of the window, it can degrade the UV performance and/or damage
the optics.