Spectra DG711 Manuel d'utilisateur télécharger pdf (Page 85)

9 Calibration

78 DG711 and DG511 Pipe Laser User Guide

Grade Check 9.3

After the first 8–15 m (25–50 ft) of

pipe has been laid, it is

recommended that you make a

grade check to ensure 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.

A B

1 2 ... 80 81 82 83 84 85 86 87 88 89 90 ... 95 96

Pas de commentaire

Spectra DG711 Manuel d'utilisateur Page 85