Bosch GTL3 Instructions Manual page 11

– 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.
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– Turn the tool by 45° so that the center of
– Mark the center of the 45° laser line at a
– The difference d of the two points VII
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.
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the 0° laser line runs through the point VI.
The crossing point of the laser lines must
still be on the point II.
distance of 16 ft as point VII as near as
possible next to the point I.
and I is the actual deviation of the 0° laser
line and the 45° laser line.
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