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Applications and Setups 5
DG711 and DG511 Pipe Laser User Guide 37
The laser is now at the proper
working elevation.
Surveyor rod
Grade hub
Table 5.2 Example 1: Setting the Grade Rod on top of the Top Pole
Scale
Step Description Metric Ft / Inch
Step 1 Decide what elevation the laser
beam shall be used above the
invert.
0.152 m 0.5 ft
Step 2 Record the “Cut to Invert”
information from the grade hub.
0.805 m 2.64 ft
Step 3 Measure the elevation (HI) of the
optical instrument above the
grade hub.
1.128 m 3.70 ft
Step 4 Subtract the measured distance
from the optical instrument to the
top of 1239 Universal Fixed Pole
-1.635 m -5.38 ft
Step 5 Subtract the desired elevation of
the laser beam above the pipe’s
invert.
-0.152 m -0.50 ft