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Checking the System Accuracy
Laser Receiver Calibration Check – Method 2
• Setup a rotating laser approximately 5 feet (1.5 m) high with no slope.
• Lock the center tooth on the main working screen by taping on the center tooth on the bucket symbol on the left hand side of the screen.
• Mark a spot at a point to be reached by the machine.
• Place the bucket center tip/edge on the marked spot on the ground.
• Initiate a first laser catch.
• Enter “0” as the bucket height and confirm.
• Perform a laser catch.
• Place a grade rod on the spot and place your hand held detector on grade.
• Read the grade rod and determine the height difference between that spot and the rotating laser beam.
• The measured laser height difference should match the calculated laser height (red number) shown on the screen. ± 1/3 inch (1 cm) is
acceptable.
• Check the laser receiver accuracy in various dipper stick angles.
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