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Centering
(1) Switch on the laser switch, adjust the plummet focusing knob to move the
laser spot on the same horizontal plane with ground mark point.
(2) Loosen the tribrach clamp knob and move the instrument until the center
mark coincides with the ground mark point.
(3) Repeat leveling and (2) steps. Ascertain that the center of laser spot coincides
with the mark point when rotating alidade of instrument to any direction.
(4) At last clamp the tribrach again and switch off the laser to save battery
energy.
4.2 Aim
Place the laser target on the target.
Turn the eyepiece screw until the reticle cross-hair is clear. Then turn the
telescope focusing knob until the reflective sheet image is sharp and free from
parallax, i.e. there should be no apparent movement between cross-hairs and
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