Optical Plummet - Sokkia DT5 Operating Manual

Adjusting
screws
G) Unscrew and remove the telescope reticle
adjustment cover KD
æ To move the vertical reticle line towards the
target centre, use the adjusting pin to adjust
the left and right adjusting screws as follows:
Vertical reticle line I To move the reticle to the right (left), first very
Example: To move the reticle slightly loosen the left (right) adjusting screw,
to the right (left) then tighten the right (left) adjusting screw
CD Slightly .. ~ Tighten by by this same amount.
loosen. "" ~':o~~7e Check the reticle position and repeat the
procedure until the reticle comes close to the
~ target centre.
(2 Tighten,) (1 Loosen.) CI To move the horizontal reticle line towards
the target centre, adjust the top and bottom
adjusting screws as follows:
I Horizontal reticle line I To move the reticle down (up), first very
Example: To move the reticle slightly loosen the top (bottom) adjusting
down (up) screw, then tighten the bottom (top) adjust-
Q) Slightly ~ (2 Tighten,) ing screw by this same amount. Check the
ioosæen. . . reticle position and repeat the procedure
until the reticle comes close to the target
lfr -- ---F==. centre.
(j Replace the reticle adjustment cover.
~ Tighten ~
by the same (1 Loosen).
amount
WARNING:
Over-tightening the adjusting screws may damage the reticle.
Unequal tightening of the adjusting screws may mean that the reticle
will go out of adjustment.
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"
13.4 Optical plummet
o a) Carefully level the DT5 and exactly centre a
surveying point in the reticle of the optical
plummet.
b) Turn the upper part 180. and check the
position of the surveying pOint in the reticle.
If the surveying point is not still centred in the optical plummet, adjust
as follows:
1/2~' 0 Use levellng
, "" foot screws
"~ 0 CD Remove half of the displacement using the
o levelling foot screws.
_It
i Q gG ~ Unscrew the optical plummet reticle cover
/ 4i.
C
1/2,.~. 0 Use reticle CI Now adjust the four optical plummet reticle
....... " adJusting adj'usting screws with the adj'usting pin to
'" ' screws
. ':,,0 0 centre the reticle exactly on the surveying
o point.
l
~:;~o
,
,
, ,
, ,
-
r~
For procedure, refer to "vertical and
horizontal reticle adjustment" parts æ
and CI on the previous page.
WARNING: Over-tightening the adjusting screws may damage the
reticle.
Unequal tightening of the adjusting screws may mean that
the reticle will go out of adjustment.
o
G) Check the adjustment by rotating the upper
part. The surveying pOint should remain
centred in the reticle. If necessary, repeat
the adjustment.
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