Prexiso XL2 User Manual page 6

1.4 Accuracy check on auto leveling
In order to assure your cross line laser's accuracy use
our instructions to check it.
1.4.1 To check level
Choose two walls nearly 5 m apart.
180°
A
Turn on the cross line laser to horizontal leveling in
unlocked mode. Set the instrument on a leveling half-
way between two walls (A+B).
Direct the instrument at wall A and mark the position of
the line on wall A (-> A1).
Rotate the instrument by 180° and mark the horizontal
laser line in exactly the same way on wall B (-> B1).
Then place the instrument at the same elevation as close
as possible to wall A and again mark the horizontal laser
line on wall A (-> A2).
783114a en
Rotate the instrument by 180° again and mark the laser
on wall B (-> B2). Measure the distances of the marked
points A1-A2 and B1-B2. Calculate the difference of the
two measurements. If the difference does not exceed
3 mm, then the Prexiso XL2 is within tolerance.
| (A1 - A2) - (B1 - B2) |
1.4.2 Horizontal line accuracy check
B
180°
B1B2
Place the instrument 5m away from the wall, turn it on,
move it from left to right or otherwise, compare the
beam ends of right side and left side to see the elevation
difference. If the difference does not exceed 4.5 mm,
your instrument is within tolerance.
3 mm
max.
>4.5 mm
45° 45°
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