13
14
Step 1:
Checking the Height Accuracy of the Horizontal Line
For this check, a minimum measuring distance of 16' (5m) from the instrument to
the opposite wall in a dimly lit room is required.
1.
Place the instrument on a firm and level surface or mount the instrument onto
a tripod close to
wall A.
2.
Turn on the instrument in the self-leveling mode by sliding the Pendulum Switch
2
to the UNLOCK position.
3.
Direct the laser beam against wall A and allow a few seconds for the visible line
to stabilize. Mark the center of the horizontal line projected by the instrument on
wall A (point a1).
B
A
a1
16' (5m)
4.
Rotate the instrument by 180°, allow it to self-level, and mark the center
of the horizontal line on the opposite
wall B (point b)
.
B
A
a1
b
Summary of Contents for TB-H2-LL-30-L2
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