Spectra Precision DG613 Bedienungsanleitung Seite 36

Grade Check
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After the first 25 – 50 feet (8 – 15 m) of pipe has been laid, it is recommended that you make a
grade check to insure that the setup is correct, and that the system is properly operating.
The illustration shows a method for checking grade.
1. Using a transit level, or an automatic level and a grade rod, take a reading at the beginning of
the pipe "A".
2. Using the same instruments, obtain a level reading at the end of the pipe "B".
3. The difference between the readings equals the rise over the run.
4. In terms of % of grade, rise divided by the run times 100 equals the percent of grade.
Note: The user of this equipment is expected to follow all operating instructions and make
periodic checks on the proper grade, elevation, and line of the pipe as it is being laid. Trimble or
its representatives assumes no responsibility for improperly laid pipe.
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