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Before doing any precision levelling it is
advised to check the calibration of the
instrument.
▪ Set up the laser on a tripod at about 30m
facing a wall or staff with a detector.
▪ Allow the instrument to level.
▪ Detect and note laser position on the
wall or staff.
▪ Without moving the tripod rotate the
instrument 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 instrument is out of calibration it is
advised to send it in to Spot-on.
(see www.spoton.com.au for details)
CHECKING CALIBRATION
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