Nikon DTM-302 Series, Instruction Manual

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Preparation 2
Total Station DTM-302 Series Instruction Manual 17
5. Use leveling screw A to move the bubble
into the center of the level.
6.
Repeat Step 1 through Step 5 to center the
bubble in both positions.
7. Rotate the alidade 180
°
.
8.
If the bubble in the plate level remains
centered, the instrument is level. If the
bubble moves off center, adjust the plate
level. For detailed instructions, see
Checking and Adjusting the Plate Level, page 160.
Sighting
2.1
When you sight the instrument, you aim the
telescope at the target, bring the target image
into focus, and align the image with the center
crosshairs of the reticle.
To sight the instrument:
1.
Adjust the diopter:
a. Aim the telescope at a blank area, such
as the sky or a piece of paper.
C
Warning – Never look at the sun through the telescope. If you do, you may
damage or lose your eyesight.
b.
Looking through the eyepiece, rotate
the diopter ring until the reticle
crosshairs are in sharp focus.
2. Eliminate parallax:
a.
Aim the telescope at the target image.
b. Rotate the focusing ring until the
target image is in sharp focus on the
reticle crosshairs.
c.
Move your eye vertically and laterally
to check whether the target image
moves relative to the reticle crosshairs.
If the target image does not move, there is no parallax.
C B
A
2
Center
crosshairs
Diopter ring
Telescope focusing
ring