25
Vertical Calibration
Perform the following check after completing "Horizontal Calibration" on the previous page.
(1)Checking
1
Set up the instrument half way between 2
walls a minimum of 40m away from each
other. (The instrument can be facing
either direction X or Y. And no tripod is
used.)
2
Turn the power switch on.
3
Place a piece of paper on each wall (A and B).
Mark the horizontal laser positions (Ma and Mb) on each wall using target.
4
Turn the power switch off. Position the
instrument for vertical operation (see
instruction on page 12) with the rotary
side directly facing wall A (see illustra-
tion). Make sure the unit is level by check-
ing the circular level vial. Use the leveling
screw to adjust if necessary.
5
Turn the power switch on. (Laser beam
should be in scanning mode.)
6
Mark where the split beam emitted from
the top of the rotary head strikes wall A
(Ha). Measure the distance (dHa)
between marks Ma and Ha.
about 20 m
(66ft)
about 20 m
(66ft)
Wall
A
Wall
B
about 40 m (130ft)
Wall
A
Wall
B
about 1m
Foot
