# Automatic Levelling (see figures A−B)

Position the measuring tool on a level, firm support or attach it to a tripod (18).

Turn the measuring tool on the magnetic rotating mount (3) so that the outlet aperture (1) is not obstructed.

After switching on, the automatic levelling function automatically compensates irregularities within the self-levelling range of ±3.5°. The levelling is finished as soon as the laser lines are permanently lit (i.e. no longer flashing) and do not move anymore.

If automatic levelling is not possible, e.g. because the surface on which the measuring tool stands deviates by more than 3.5° from the horizontal plane, the laser lines will flash continuously and quickly and the measuring tool will work without automatic levelling. The laser lines remain switched on, but the two intersecting lines will no longer necessarily be perpendicular to each other.

To work with automatic levelling again, set up the measuring tool so that it is horizontal and wait for the self-levelling procedure to complete. As soon as the measuring tool is within the self-levelling range of ±3.5° and is levelled in, the laser lines will light up continuously again.

In case of ground vibrations or position changes during operation, the measuring tool is automatically levelled again. Upon re-levelling, check the position of the horizontal or vertical laser line with regard to the reference points to avoid errors by moving the measuring tool.