Laser Reference pro shot L1-M, Service Manual

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19
Periodic maintenance and service
checks.
1. Calibration check:
Procedure: Using the 50-1000 Calibration alignment range or equivalent.
A. Place the laser on the calibration range stand.
B. Power-up the laser in "cal mode":Press and hold the alarm mode button. Press and
release the power button. Release the alarm mode button.
C. Rotate the laser such that the grade counter (+ X axis) is facing the optical instrument.
Allow about 30 seconds for the sensor to settle and then re-level the laser as required.
D. Adjust the alignment range calibration receiver to obtain an on-grade indication, and
find the center of the on-grade reading. Record this reading.
E. Rotate the laser 180 degrees and re-level it. Wait for the laser to settle and adjust as
required.
F. Adjust the alignment range calibration receiver to obtain an on-grade indication, and
find the center of the on-grade reading. Record this reading.
G. Move the calibration receiver to the mid point between the two recorded readings.
H. Use the X axis leveling screw to tilt the laser until an on grade reading is achieved.
I. Using a 1/4" wrench, adjust the Cross Axis calibration screw until the Cross Axis
display is centered. Wait for about 30 seconds to be sure no further adjustment is needed.
J. Rotate the laser 90
°
so that the + Slope Axis is facing the optical instrument. Level the
laser and wait for about 30 seconds to be sure no further adjustment is needed.
K. Without moving the calibration receiver, adjust the laser until an on grade indication
is achieved.
L. Center the Slope Axis sensor using the potentiometer on the back of the laser inside
the battery compartment. Wait for about 30 seconds to be sure no further adjustment is
needed.
M. To check for cone error, adjust the centering receiver to obtain an on grade
indication. Now, adjust the calibration receiver to obtain an on grade indication. The
difference from the known zero point (if any) is the error.
N. To check for squaring error, do not move the calibration receiver after completing the
three axis calibration above, rotate the laser approximately 150 degrees and align it with
the scribed mark on the alignment range. Level the displays and wait for about 30
seconds to be sure no further adjustment is needed.
O.
Record the position of the calibration receiver and then adjust it until an on grade
indication is achieved. The difference shown (if any) is the error.