
10
Before doing any precision levelling it is advised to check the calibration of the unit.
‣Set up the laser on a tripod at about 30m facing a wall or staff with a detector.
‣Allow the unit to level.
‣Detect and note laser position on the wall or staff.
‣Without moving the tripod rotate the unit 180°.
‣Detect and note laser position on the wall or staff.
‣Calculate the distance between the two readings.
‣The difference should be within 6mm at 30m.
‣If the unit is out of calibration it is advised to send it in to Spot-on.
(see www.spoton.com.au for details)
CHECKING CALIBRATION