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-16-
– Direct the laser against the close wall A and
allow the tool to level in. Mark the center of
the point where the laser lines cross each
other on the wall (point I).
B
180˚
– Turn the tool by 180°, allow it to level in and
mark the cross point of the laser lines on
the opposite wall B (point II).
– Without turning the tool, position it close to
wall B. Switch the tool on and allow it to
level in.
B
– Align the height of the tool (using a tripod or
by underlaying, if required) in such a
manner that the cross point of the laser
lines is projected against the previously
marked point II on the wall B.
B
d
180˚
– Without changing the height, turn around
the tool by 180°. Direct it against the wall A
in such a manner that the vertical laser line
runs through the already marked point I.
Allow the tool to level in and mark the cross
point of the laser lines on the wall A (point III).
– The difference of both marked points I and III
on wall A results in the actual height deviation
of the tool alongside the lateral axis.
On the measuring distance of 2 x 16ft = 32ft,
the maximum allowable deviation is:
32ft x ±0.0024in/ft = ±5/64 (0.078 in)
Thus, the difference d between points I and
III must not exceed 5/64 in (max.).
Checking the Leveling Accuracy
of the Vertical Line
For this check, a door opening is required
with at least 8ft of space (on a firm surface) to
each side of the door.
– Position the tool on a firm, level surface (not
on a tripod) 8ft away from the door opening.
Allow the tool to level in while in vertical
operation with automatic leveling, and direct
the laser beam at the door opening.
8ft (2.5m)
8ft (2.5m)
– Mark the center of the vertical laser line at
the floor of the door opening (point I), at a
distance of 8ft beyond the other side of the
door opening (point II) and at the upper
edge of the door opening (point III).
6.5ft (2 m)
d
– Rotate the tool by 180° and position it on
the other side of the door opening directly
behind point II. Allow the tool to level in and
align the vertical laser line in such a manner
that its center runs exactly through points I
and II.
2610050360 01-18 GLL3-330CCG.indd 16 1/12/18 3:12 PM
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