5 Applications and Setups
36 DG711 and DG511 Pipe Laser User Guide
Method 1: Using the Top Pole
Scale (TPS)
Grade rod set on top of the Fixed
Pole.
Note – First decide the laser
beam’s elevation above the invert.
1Record the “cut-to-invert”
information from the grade hub.
2Set up an automatic level and
measure its elevation (HI) above
the grade hub.
3Set a grade rod on top of the
Fixed Pole and record the
measurement with the automatic
level.
4Subtract the desired laser beam
elevation above the pipe’s invert.
5Calculate the TPS setting.
Laser beam distance
above invert
Rod reading
on grade
hub
Rod reading on top
of fixed pole
Cut to invert
HIn