Newcon Optik NVS 6 - Manual (Page 21)

20
Goggles and mount contacts
Table 2-2 Before operation check (cont'd).
Step Item Procedure NO-GO criteria
9 Eyepiece
assembly
Check eyepiece to make sure: the
whole assembly is not loose; that
there is a free movement through full
range of travel. Normally, the +2
mark on the eyepiece focus ring can
turn counter clockwise past the
reference dot up to the second hole
in the indicator plate and the -6 mark
clockwise past the reference dot. The
-6 mark can turn clockwise well past
the reference dot. As long as the
eyepiece focus ring stops at each
extreme of travel this situation is
OK. If the eyepiece focus ring
continues to turn and the whole lens
turns with it, the eyepiece is loose.
The reference dot on the indicator
plate may be at any point around the
eyepiece. Eyepiece
assembly
Loose, travel
binds.