Datum DT3X360G, Operating Instructions Manual

Page: 8 / 12

8 CROSSLINE LASER LEVEL
CALIBRATION CHECK
It’s possible for you to check the calibration of the laser. Calibration by yourself is only
approximate and the accuracy of the calibration will depend on the care with which you
proceed.
TO CHECK THE LEVEL
Checking the horizontal pitch calibration of the laser requires 2 walls, which must be at least 5
metres apart. The best calibration results can be achieved if the laser is mounted on a tripod.
1. Mark point A1 on the wall.
2. Turn the device 180 ° and mark A2 on the opposite side of A1. You now have a horizontal
reference between point A1 and A2.
3. Position the device as near as possible to the wall at the same height of point A1.
4. Turn the device 180° and mark point A3. The difference between point A2 and A3 is the
tolerance.
1.
1.
If the distance between A2 and A3 is more than 2mm/10m, the device is in need of calibration.
Contact authorised dealer or service agent.
CHECKING THE VERTICAL LINE
1. Position the device about 5 m from a wall. Fix a plumb bob with a line of 2.5 m length on
the wall, making sure that the bob can swing freely.
2. Switch on the device and align the vertical laser to the plumb line. The precision is within
the specified tolerance if the deviation between the laser line and the plumb line is not
greater than ± 2 mm.