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5. Loosen the union nut (1).
Fig. 9
6. Remove the fiber optic holder
(2) from the spark stand.
7. Loosen the window holder (3)
from the spark stand.
The quartz window is
located between the holder
and the O-ring.
Direct contact with the optical
surfaces must be avoided!
Fig. 10
7. Clean the light inlet window(4),
using optical paper or a lint-free
soft cloth.
Fig. 11