Self-Check & Fine Calibration - Johnson 40-6645 Manual De Instrucciones

8369H-All_Manuals 10/3/14 1:57 PM Page 11
8. Self-Check & Fine Calibration
IMPORTANT: It is the responsibility of the user to verify the
calibration of the instrument before each use.
Horizontal Accuracy (transversely)
1. Locate a wall, set up an elevated tripod 15 feet away from the wall, fix
the laser to the tripod.
2. Rotate the laser until the V1 laser beam faces the wall and power on all
the laser lines, mark the cross dot of V1 and H on the wall as point "A".
3. Rotate the laser 90º counter-clockwise and mark the cross dot of V2
line and H line as "B".
4. Measure the distance 'e' between "A" and "B". (See illustration below)
5. If the distance is greater than 3mm (0.125"), then the horizontal line
accuracy is out of tolerance and the laser needs to be calibrated.
When the horizontal line accuracy is out of
tolerance, remove the screw of the
self-calibration port. Use a 3mm hex
wrench to adjust the laser to get a
distance 3mm.
©2014 Johnson Level & Tool
V2
Self-
Calibration
Port
V1
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