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Applications and Setups 5
DG711 and DG511 Pipe Laser User Guide 53
2 Set the tripod and laser on line
behind the first manhole and
ensure the system is level.
3 Suspend a plumb bob from the
tripod or use a Laser Plummet over
the first point.
4 Transfer the elevation into the
manhole using a level, transit, or
with your laser set to 0.00% grade.
5 Set a stake on the centerline of
the pipe so the top of the stake is at
invert elevation.
6 Use the wireless remote to
position the beam on the rod as you
take your readings.
7 Add your grade rod reading to
your cut-to-invert reading.
8 Set a target on rod at this
distance. For example:
Rod reading = 6.48
Cut-to-invert = 4.51
Set to = 10.99
Grade hub
C.I.
Grade rod
reading
Instrument method-manhole
10.99
Laser beam
Pipe
invert