Newcon Optik LRB 3000PRO - Manual (Page 20)

16
3 – Unit shall be well levelled with deviation from 0 not more
than ±0.75 degrees. Horizontal direction shall be to Magnetic
North (not True North). If devices detects large installation
errors (unit is not well levelled or not aimed to the North),
then LCD will show result “444” and “99”, which means that
correction was not performed due to incorrect setup.
Compass calibration
If the System was exposed to a strong magnetic field or was
not in use for a long time, the compass accuracy may
diminish.
To return the compass into working condition:

Select CALc from CAL menu
 Keeping the unit horizontally, perform one full rotation
around vertical axis within half a minute and then one
full rotation around vertical axis with device upside down
during half a minute.
 If one rotation does not restore calibration – perform two
rotations.
The normal compass functioning will be restored.