Circular Level - Sokkia DT5 Operating Manual

If the bubbles are not still centred, adjust as follows:
CD Use levellng screws
æ Use adjusting pin
(
13.2 Circular level
CD Correct half of the bubble displacement of
the plate level which is parallel to a line
between levelling screws A and B by turning
levelling screws A and B in equal and
opposite directions.
Correct half of the bubble displacement of
the other plate level bubble with levelling
screw C.
æ Centre both plate level bubbles by turning
the plate level adjusting screws wand fI
with the adjusting pin.
CI Repeat the procedures from a) until the
bubbles remain centred for any position of
the upper part.
a) Perform the plate level adjustment as in
12.1, or carefully level the plate leveL.
b) Check the position of the circular level
bubble.
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If the bubble is off-centre, adjust as follows:
.Circuiar level CD Note the off-centre direction of the bubble.
adjusting
. screws æ Loosen the adjusting screw farthest from this
~ direction to centre the bubble.
CI Adjust all three adjusting screws until the
tension of each screw tightening is the same,
and the bubble is centred.
WARNING: Over-tightening the adjusting screws may damage the
circular leveL.
Unequal tightening of the screws may mean that the bubble
will go out of adjustment.
13.3 Reticle
13.3.1 Perpendicularity of the reticle to the horizontal axis
a) Carefully level the DT5.
Select and sight a clear target on the upper
part A of the reticle line.
b) Turn the telescope vertical fine motion screw
until the target is on the lower part of the
reticle B.
Check that the target is stil positioned
centrally within the vertical lines.
æ
If the target is off-centre, the following adjustment should be performed:
Adjusting
screws CD Unscrew and remove the telescope reticle
adjustment cover 0..
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