Spectra Precision Focus 6, User Manual

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2
Setting up the Instrument
32
Spectra Precision Focus 6 5" Total Station User Guide
Focusing the telescope
C
WARNING – Never look at the sun through the telescope. If you do, you may damage or
lose your eyesight.
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 cross-hairs 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.
b. Looking through the eyepiece, rotate the
diopter ring until the reticle cross-hairs 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 cross-hairs.
c. Move your eye vertically and laterally to check whether the target image
moves relative to the reticle cross-hairs.
–
If the target image does not move, there is no parallax.
–
If the target image does move, rotate the telescope focusing ring and
repeat
Step 2c .
3. Rotate the tangent screw. The final turn of the tangent screw should be in a
clockwise direction, to align the target accurately on the center cross-hairs.
Center
crosshairs
Diopter ring Telescope
focusing ring