Zone20 H | 22Accuracy Adjustment
7 Accuracy Adjustment
About • It is the responsibility of the user to follow operating instructions and to periodically check the accuracy
of the laser and work as it progresses.
• The Zone20 H is adjusted to the defined accuracy specification at the factory. It is recommended to
check the laser for accuracy upon receipt and periodically thereafter to ensure accuracy is maintained.
If the laser requires adjustment, contact your nearest authorised service centre or adjust the laser
using the procedures described in this chapter.
• Only enter the accuracy adjustment mode when you plan to change the accuracy. Accuracy adjust-
ments should only be performed by a qualified individual that understands basic adjustment principles.
• It is recommended to perform this procedure with two people on a relatively flat surface.
7.1 Checking the Level Accuracy
Checking the level accu-
racy step-by-step
The Zone20 H is within its accuracy specification if the four marks are within ± 1.5 mm (± 1/16")
from the centre.
Step Description
1. Place the Zone20 H on a flat, level surface or tripod approximately 30 m (100 ft) from a wall.
2. Align the first axis so that it is square to a wall. Allow the Zone20 H to self-level completely
(approximately 1 minute after the Zone20 H begins to rotate).
3. Mark the position of the beam.
4. Rotate the laser 180° and allow it to self-level.
5. Mark the opposite side of the first axis.
6. Align the second axis of the Zone20 H by rotating it 90° so that this axis is square to the wall.
Allow the Zone20 H to self-level completely.
7. Mark the position of the beam.
8. Rotate the laser 180° and allow it to self-level.
9. Mark the opposite side of the second axis.
011292_001
30 m (100 ft)
30 m (100 ft)
X+
X—
011293_001
30 m (100 ft)
30 m (100 ft)
Y+
Y—
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