Working Advice - Bosch GCL100-40G Operating/Safety Instructions Manual

I), 16 ft (5 m) away on the other side of
the door opening (point II) and on the
upper edge of the door opening (point
III).
– Rotate the measuring tool 180° and
position it on the other side of the door
opening, directly behind point II. Allow
the measuring tool to level in and align
the vertical laser line in such a way that
its center passes through points I and
II exactly.
– Mark the center of the laser line on
the upper edge of the door opening as
point IV.
– The discrepancy d between the two
marked points III and IV reveals the
a c t u a l ve r t i c a l d ev i a t i o n o f th e
measuring tool.
– Measure the height of the door
opening.
You can calculate the maximum permitted
deviation as follows:
Doubled height of the door opening × 0.3
mm/m
Example: At a door opening height of 2
m, the maximum deviation amounts to
2 × 6.5 ft × ±0.0036 in/ft = 0.047 in
(2 × 2 m × ±0.3 mm/m = ±1.2 mm)
The points III and IV must therefore be no
further than 1.2 mm from each other.
Checking Plumb Accuracy
For this check, you will need a clear
measuring space on firm ground with a
distance of approx. 16 ft (5 m) between
the floor and the ceiling.
– Mount the measuring tool onto the
rotating mount (11) and place it on the
floor. Select point mode and allow the
measuring tool to level in.
Mark the center of the top laser point
–
on the ceiling (point I). Also mark the
center of the bottom laser point on the
floor (point II).
Turn the measuring tool by 180°.
–
Position it so that the center of the
bottom laser point falls onto the
marked point II. Allow the measuring
tool to level in. Mark the center of the
top laser point (point III).
– The discrepancy d between the two
marked points I and III on the ceiling
reveals the actual deviation of the
measuring tool from the vertical plane.
You can calculate the maximum permitted
deviation as follows:
Doubled distance between floor and
ceiling × 0.0084 in/ft (0.7 mm/m)
Example: At a floor-to-ceiling distance
of 16 ft (5 m), the maximum deviation
amounts to
2 × 16 ft x 0.0084 in/ft = 0.27. The points
I and III must therefore be no further than
0.27 from each other.

Working Advice

• Only the center of the laser point or
laser line must be used for marking.
The size of the laser point/the width
of the laser line changes depending on
the distance.
-16-
16 ft (5 m)
d
180°