Bosch GPL5 Operating/Safety Instructions Manual page 12

Transferring points with the plumb beam
1. Mark the point to be transferred (labeled
A in this illustration).
2. Use the Mounting accessory or a Tripod
to position the plumb down beam over
point A.
3. The plumb up beam will transfer this point
along a perfectly vertical axis to point B.
4. Mark point B.
Note: This process may be reversed.
Plumb Transfer
Leveling
1. Adjust the height of tool using the
mounting accessory or a tripod so that
the horizontal beam hits a reference point
(labeled A in this illustration).
2. Rotate tool around its mounting axis to
position the front level beam at a point of
interest (labeled B in this illustration).
Note: It is possible to use the beam as a
leveling instrument without marking a line
through beam locations, however, some may
find it more satisfying to mark the beam
location at a variety of points and then create
a straight line through those points to
achieve a level line.
Level
A
Grading
1. Position tool at the highest point of
the surface to be graded.
2. Turn tool on.
3. Measure distance A and make a note of
the distance.
4. Measure distance B at distance X away
from A and note these distances.
5. Slope = (B – A)/X
Note: To calculate Pitch, set X equal to 12".
Grade
Squaring
1. Position tool in the corner of the
two surfaces to be squared (as illustrated).
2. Turn tool on.
3. Measure distance A at a point relatively
close to tool and make a note of
the distance.
4. Measure distance B at a point further
away from tool and make a note of
the distance.
Note: The greater the distance between the
two points of measurement, the greater
the accuracy.
5. Compare distance A with distance B.
6. If distance A equals distance B, proceed to
the next step. If distance A does not equal
distance B, then adjust the position of
tool until distance A does equal
distance B and proceed to the next step.
7. Measure distance Y at a point relatively
close to tool and make a note of
the distance.
8. Measure distance Z at a point further away
from tool and make a note of
the distance.
Note: The greater the distance between the
two points of measurement, the greater
the accuracy.
9. Compare distance Y with distance Z.
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