Johnson-level-tool-mfg 40-6580 Manual de usuario descargar pdf (Pagina 22)

8. Self-Check and Calibration

IMPORTANT: It is the responsibility of the user to verify the

calibration of the instrument before each use.

Accuracy Check

1. Put the laser on a tripod 50’ away from the wall. Put the laser

on the tripod with X+ axis towards wall.

2. Power on and after self-leveling,

using the detector, make a

mark “A” on the wall where the detector indicates on grade with

the laser beam.

3. Turning the instrument 90º, Y+, X-, Y-, after the laser self-levels,

mark “B” for Y+, “C” for X- and “D” for Y- on the front wall. Make

sure points B, C, D are in the same vertical line as point A.

4. Measure the vertical distance between the highest and lowest

points between A, B, C, D and mark that “h”.

5. If “h” is less than 1/32”, the accuracy is good. If it is more than

1/32”, the accuracy is beyond its tolerance and the laser needs to

be recalibrated.

50’

2406H 5/28/09 9:04 AM Page 22

1 2 ... 17 18 19 20 21 22 23 24 25 26 27 28 29 30

Sin comentarios

Johnson-level-tool-mfg 40-6580 Manual de usuario Pagina 22