Spectra DG711 - page 46

Applications and Setups 5
DG711 and DG511 Pipe Laser User Guide 39
Method 2: Setting Grade Rod
on Top of Laser
Note – Using this method, the
offset distance of 70 mm (0.23 ft)
between the top of the Laser
housing and the center of the laser
beam will be used.
1Decide what elevation of the
laser beam shall be used above the
invert.
2Record the “cut-to-invert”
information from the grade hub.
CI = 0.805m
(2.64')
AKS = 1.933m (6.34') - 0.152m (.5') - 1.635m (5.38') = 0.146m (0.46')
1.128m (3.70')
14.6cm (0.46')
HIn = 1.933m (6.34')
1.635m (5.38')
0.152m (0.5')
A
A
Rod reading set on
top of fixed pole
Rod reading on top of laser