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Calibration 9
DG711 and DG511 Pipe Laser User Guide 79
Example 9.3.1
The pipe is laid correctly when the
rod reading “A” minus rod reading
“B” equals the rise according to the
engineering plans.
Table 9.1 Grade check chart
Metric Ft / Tenths
Rod Reading at “A” 4.801 m 15.74 ft
Rod Reading at “B” 3.749 m 12.289 ft
Rise or Difference
(A – B)
1.052 m 3.451 ft
Distance from A to B 44.196 m 145 ft
Rise divided by Run 0.0238 0.0238
Rise divided by Run times
100 = Laser Setting
2.38% 2.38%
Rise according to
engineering plans
(2.38% * 44.196 m) =
1.052 m
(2.38% * 145 ft) =
3.451 ft