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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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