Product Manual

PL20 Pipe Laser Calibration Proceedure
XY Calibration Screen
The LMPL20 offers the user the ability to recalibrate.
1. In the Menu Display Screen select XY Calibration Option (Fig. 5 e) and press the “C” button.
2. The XY Calibration Option Screen will appear in the LCD display (Fig. 7).
Y Axis (Grade Axis)
Check calibration as outlined in the calibration or peg test ( see Figures 32 –34 ).
If unit is out of calibration then do the following:
1. Center the line adjustment by pressing left and right adjustment arrows.
2. Zero the grade counter.
3. In the Menu Display Screen select XY Calibration Option (Fig. 5 e) and press the “C” button.
4. Press the Lock key (Fig. F) to enter the Y axis adjustment screen.
5. Using the up(E1) and down (E2) buttons change the laser grade setting (this adjusts the beam without
changing the counter) to the correct elevation.
Note: With the laser beam set all the way to the left (E1) makes the beam go up and (E2) makes the beam go
down. With the laser beam set all the way to the right it is opposite. (E1) makes the beam go down and (E2)
makes the beam go up.
6. Press menu button to accept changes.
7. Recheck Y axis calibration.
X Axis (Cross Axis)
Check the cross axis calibration as outlined in the calibration procedure (see figures 35-39).
1. Center the line adjustment by pressing left and right adjustment arrows.
2. Zero the grade counter.
3. Move the laser spot line adjustment to right or left extreme and check elevation. If incorrect then follow
steps below.
4. In the Menu Display Screen select XY Calibration Option (Fig. 5 e) and press the “C” button.
5. Using the up and down arrows change the laser grade setting (this adjusts the beam without changing
the counter) to the correct elevation.
6. Press menu button to accept changes.
7. Move the laser spot line adjustment to opposite side and repeat the adjustment process.
8. Recheck X axis calibration.
APPLICATIONS
Setting LM-PL20 (All models)
Set Up of the Laser at the Correct Elevation (HI)
All height references are given in relationship to the Invert Elevation (inside lowest point of pipe).
1. Attach the LM-PL20 to the trivet plate or position in the manhole on the correct feet.
Care should be taken that the LMPL20 is positioned on the correct centerline.
2. Use the three leveling screws to adjust the trivet plate to approximate level condition (not required
when mounting on self centering feet with pre-poured inverts - as the invert should be at the
correct elevation).
16 • LMPL20