6R, 6G, 180R, 180G
Users Manual
16
Plumb Accuracy (6R, 6G Only)
To check the accuracy of the plumb:
1. Find a site that has a ≥2.29 m (7.5 ft) vertical height.
2. Place a cross mark at the bottom of the site.
3. Center the down point laser on both axes of the cross mark. See Figure 10.
Figure 10. Plumb Accuracy
4. Place a cross mark at the point where the up point laser intersects the target area at the top of the site.
5. Turn the Product 180 ° on its center.
6. Repeat step 3 and step 4.
If the first and second cross marks on the target area at the top of the site are the same, the laser is plumb.
7. If the cross marks are not the same, measure the distance between the center points of the two cross marks
and divide by two to calculate the difference of error.
If the distance is ≤3 mm at 10 m (1/8 in at 30 ft), the laser is within calibration accuracy.
≥ 2.29 m
(7.5 ft)
123
-
3 mm @ 10 m
1 2
1 2
(1/8 in @ 30 ft)
≤
1 2
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