54
7 Compare the two measurements dHa and dHb. If the difference between the two mea-
surements is less than 2.5mm ( 1/10 of an inch), no adjustment is necessary. Otherwise,
adjust as follows.
(2)Checking RL-VH3B
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 19 ) 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 40 m (131ft)
Wall
A
Wall
B
about 1m
Foot
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