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Checking Calibration
To check the horizontal calibration, a tripod with a 5/8-11 threaded
mount, handheld detector, universal key (supplied), or a 1/16 in. (1.5
mm) diameter pin or small nail are required. Having another person to
help saves time if you need to adjust the calibration.
1. Set up and level the laser 100 ft (30 m)
from a wall.
2. Point the Y- axis toward the wall. Raise/
lower the detector until you get an on-grade
reading. Using the on-grade marking notch
as a reference, make a mark on the wall.
.
This mark is Y
1
Note: For increased precision, use the
fine accuracy (deadband) setting on the
detector.
3. Rotate the laser 180° (Y+ axis toward
the wall) and re-level the laser.
4. Raise/lower the detector until you get
an on-grade reading for the Y+ axis.
Using the on-grade marking notch as a
reference, make a mark on the wall. This
mark is Y
.
2
5. Measure the difference between the two
marks. If they differ more than 1/8 inch at
100 feet (3.0 mm at 30 m), the laser needs
calibrating.
6
Checking Calibration
6. To correct for a calibration error, position
the receiver at the midpoint of the two
elevation marks on the wall. This position
is Y
.
3
Note: Although you can calibrate the laser
by yourself, having another person to help
saves time.
7. To adjust the calibration, insert the
universal key (or a nail 1/16 in. or 1.5 mm
diameter) into the opening in the calibration
screw and turn the screw in the appropriate
direction.
Note: The arrows on the display show
which direction the calibration screws
need turning. An up arrow on the receiver
indicates that the Y axis calibration screw
needs to be turned clockwise to lower the
laser plane. A down arrow on the receiver
indicates that the Y axis calibration screw
needs to be turned counterclockwise to
raise the laser plane.
8. Rotate the laser 180° back to the original
face. Make sure this axis is less than 1/16
in. (1.5 mm) from the midpoint line.
Note: If additional adjustment is required,
repeat steps 2-7 above.
9. After adjusting the Y axis, rotate the
laser 90°. Repeat steps 2-8 starting with
the –X axis facing the wall.
Calibration
Screws
7
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