ADA INSTRUMENTS DigiTeo-10, Operating Manual, Page: 19 / 58

MEASUREMENT FOUNDATION
19
Digi Teo-2/5/10/20
Adjustment:
Unscrew the cross-hair adjustment section cover by
revolving it in the counter-clockwise direction. This
will expose four eyepiece section attachment screws.
a. Loosen all four attachment screws slightly with
the accessory screw-driver. (while taking note of the
number of the revolutions.) Make vertical cross-hair
coincide with A by turning eyepiece and tighten the
four attachment screws.
b. Check if there is displacement in horizontal direction while point A travel-
ling along vertical cross-hair. If not, check is concluded.
4. Collimation of the instrument
Collimation is required to make the line of sight of the telescope per-
pendicular to the horizontal axis of the instrument.
Check:
a. Set the instrument up with clear sights of abort 50 to 60 meters of both
sides of the instrument.
b. Sight point A at approximately 50 meter distance.
c. Loosen the vertical tangent screw only and plunge the telescope 180 °
around the horizontal axis so that the telescope is pointed in the opposite
direction.
d. Sight point B, at equal distance as point A.
e. Loosen the horizontal motion clamp and tangent screw and revolve the
instrument 180°or 200gon. Fix a sight on point A once more and tighten
the motion clamp and screw.
3. Check and adjust vertical cross-hair
Adjustment is required if the vertical cross-hair is not
in a plane perpendicular to the horizontal axis of the
telescope.
Check:
a. Set the instrument on the tripod and carefully level it.
b. Sight the cross-hair on a well-defined point A on the
wall at a distance of at least 50 meters. (160ft )
c. Next swing the telescope and check whether the
point travels along the length of the vertical cross
hair.
d. If the point appears to move continuously on the
vertical hair (see fig.1), the vertical cross-hair lies in
a plane perpendicular to the horizontal axis.(adjustment
is not required.)
e. However if the point appears to be displayed from
the vertical cross-hair (see fig.2) , adjustment is
required in the reticule plate.
reticle retaining crews
eyepiece