23
CALIBRATION
Checking Calibration of the Y- and X-Axes
1. Set up the laser 30 m (100 ft) from a wall and allow it to level.
2. Set the grade to 0.000% in both axes.
3. Raise/lower the receiver until you get an on-grade reading for the
+Y axis. Using the on-grade marking notch as a reference, make
a mark on the wall.
Note: For increased precision, use the fine-sensitivity
setting (1.5 mm/ 1/16 in.) on the receiver.
4. Rotate the laser 180° (-Y axis toward the wall) and allow the laser
to re-level.
5. Raise/lower the receiver until you get an on-grade reading for the
–Y/axis. Using the on-grade marking notch as a reference, make
a mark on the wall.
6. Measure the difference between the two marks. If they differ
more than 3 mm at 30 m (1/8 inch at 100 feet), the laser needs
calibrating.
7. After checking the Y-axis, rotate the laser 90°. Repeat the above
starting with the + X axis facing the wall.
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