Spectra DG711 User Manual Page 46

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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.
1 Decide what elevation of the
laser beam shall be used above the
invert.
2 Record 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
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