Product Manual

LEVEL ACCURACY CHECK
Seting two benchmarks
Locate a previously level area to set the LMPL20. Level the LMPL20 and set the grade to precisely 0.000% Set
two markers (A and B) in line with the laser. Marker “A” should be set 1’ (.3M) from front of the LMPL20, and
Marker “B” should be set 100’ (30M) away. (Fig. 32)
Level Check
A. Set a measuring rod directly on top of marker ”A”. Mark where the beam strikes the
measuring rod “A1”
B. Set the same measuring rod directly on marker “B” and mark this point “B1” (Fig. 33)
C. Move the LMPL20 to the opposite side of the markers so that it is located 1’ from marker “B” and 100’
away from marker “A”. (Fig. 34)
D. Make sure that the laser beam strikes mark “B1” when the measuring rod is place on marker “B”. If
needed adjust the height of the LMPL 20 so that the laser strikes “B1” (Fig. 34)
E. Now set the measuring rod on marker “A” an if the laser beam strikes mark “A1” . the LMPL20 is
calibrated. If the laser beam did not strike mark “A1” then the unit needs to be calibrated.
X AXIS CROSS LEVEL CHECK
The LMPL20 offers the option to check and adjust the Calibration of the Horizontal Line Position.
Select XY Calibration from the Menu Display Screen and press the “C” Button.
1. Place the Pipe laser (50) feet from the pole. (See Fig. 35).
2. Turn on the LMPL20 and allow it to self level.
3. Verify that the Line Position is set to the default center position. Point the laser at the Pole and
mark the center of the laser on the Pole.
4. Adjust the Line Position to its maximum right Line Position setting by pressing the “D2” Button.
(See Fig. 36).
5. Turn the LMPL20 so that the laser is pointing at the Pole (See Fig. 37). Allow the LMPL20 to
self level.
6. Compare the laser height of the current maximum right setting to the center mark that was
previously recorded. If they are level with each other, no adjustments need to be made. If they
are not level, follow X axis calibration procedure (see page 16 ).
7. Once the right side has been completed, adjust the line position to its maximum left Line Position
setting by pressing the “D1” button. (See Fig. 38).
8. Turn the LMPL20 so that the laser is pointing at the Pole (See Fig. 39). Allow the LMPL20 to
self level.
9. Compare the laser height of the current maximum left setting to the center mark that was
previously recorded. If they are level with each other, no adjustments need to be made. If they
are not level, follow X axis calibration procedure (see page 16 ).
10. Power off the LMPL20 by pressing the “A” button. Center the LMPL20 and turn it on. Allow it to
self level.
11. Repeat the calibration procedure to verify the previous adjustments are correct. Repeat
as needed.
LMPL20 • 15