Spectra Precision Focus 8 Series, User Manual

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2 Preparation
3 0 Spectra Precision Focus 8 Series Total Station User Guide
Sighting
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.
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.
d. If the target image does move, rotate the telescope focusing ring. Then
repeat from
Step c .
3. Rotate the tangent screw:
–
The final turn of the tangent screw should be in a directions, to
align the target accurately on the center crosshairs.
Center
crosshairs
Diopter ring Telescope focusing
ring