Bosch GPL5 User Manual

Page 12

-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

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.