Spectra Precision DG613, Информационное руководство

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Setting Line
The principle for setting line is always the same. The Laser is
positioned over the starting point of the pipe run then aimed to
the second control point on line. The further your second point is
from the laser, the more accurate your line will be.
First Point Setup (Using Plumb-bob):
Whether using the Laser in the invert or attached to the various
mounting plates the goal is to always set the Laser’s line axis bulls-
eye target over the vertical centerline of the pipe. This is
accomplished by one of the following methods:
1. Place the bulls-eye target under a plumb bob that has been
transferred from an offset grade hub.
2. If using a transit or theodolite, align the bulls-eye target to the
vertical cross hair of the transit’s telescope.
3. If the bulls-eye target cannot be seen, use the plus sign on the
positive grade button to align the target to the vertical cross
hair of the transit.
4. In an over-the-top setup, set the laser on a tripod and plumb
bob them over the first grade stake.