Bosch GTL3 - Page 12

-12-
– Position the tool (without turning it) at a
distance of 16 ft so that the crossing point
of the laser lines is on the already marked
point II and that the 0° laser line runs
through the point III.
Mark the 45° laser line at a distance of
16 ft (Point IV).
– Turn the tool by 45° so that the center of
the 0° laser line runs through the point IV.
The crossing point of the laser lines must
still be on the point II.
Mark the 45° laser line at a distance of
16 ft as point V.
– Turn the tool by 45° so that the center of
the 0° laser line runs through the point V.
The crossing point of the laser lines must
still be on the point II.
Mark the 45° laser line at a distance of
16 ft as point VI.
– Turn the tool by 45° so that the center of
the 0° laser line runs through the point VI.
The crossing point of the laser lines must
still be on the point II.
– Mark the center of the 45° laser line at a
distance of 16 ft as point VII as near as
possible next to the point I.
– The difference d of the two points VII
and I is the actual deviation of the 0° laser
line and the 45° laser line.
The measuring length 4 x 16 ft = 64 ft has a
maximum admissible deviation of:
64 ft x ±0.0157 in/ft* = ±1 in.
Therefore, the maximum difference d
between the points I and VII may be 1in
or less.
* The value ±0.0157 in/ft results from the
angle accuracy ±0.00787 in/ft plus a possible
uncertainty of 0.00787 in/ft while turning.
d
GTL3 manual-3 2610A11667:Bosch 2/23/11 12:50 PM Page 12