Product Manual

2 Preparation
18 Nikon XF Series Total Station Instruction Manual
Sighting and Focusing
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.
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. Turn ON the instrument and rotate the
focusing ring until the target image is in
sharp focus on the reticle crosshairs.
– The focusing lens built-in the XF
Series is driven by a motor when
rotating the telescope focusing ring. On the other hand, as the
focusing lens of the XF HP Series is not driven by a motor, it is not
necessary to turn ON the instrument in this procedure.
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 clockwise direction, to
align the target accurately on the center crosshairs.
Center
crosshairs
Diopter ring
Telescope focusing
ring