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M i l l i k a n O il D r o p A p p a r a t u s
5.
Recheck the reticle to assure that it is still in proper alignment with the focusing wire (as in step 2).
6.
Lock the viewing scope into position by tightening the set screw into the viewing scope holder.
Adjusting the horizontal reticle alignment
If the horizontal alignment of the viewing scope is altered during rough handling, realign it using the following
procedure:
1.
Loosen one of the two socket head cap screws on the bottom of the platform shown in Figure 13.
2.
With the focusing wire in place and while looking through the eyepiece, gently tap the viewing scope until the
focusing wire is centered in the reticle.
.
3.
Lock the viewing scope into position by tightening the
two socket head cap screws into the viewing scope
holder.
Touching up the black painted surface on the plastic spacer
After prolonged use and repeated cleaning, the black paint (Figure 14) that absorbs refracted and reflected light on
the plastic spacer may begin to wear off. In that event, touch up the surface with a thin coat of flat black acrylic
paint such as that available at hobby stores. Do not use a lacquer or oil-based paint.
Do not allow paint to get on the top and bottom flat surfaces of the plastic spacer since that
would change the plastic spacer thickness.
18
Only a very small adjustment will be required.
Use care to avoid losing site of the focusing wire.
Figure 14: Area on the plastic spacer that
should be painted black
012-13093B
M a i n t e n a n c e N o t e s
Figure 13: Location of the socket head cap
screws that anchor the viewing scope
black painted
area
socket head
cap screws
bottom of
platform
®
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