©2017 Johnson Level & Tool - Rev. 1 23
11.Position the laser so the Y-direction is facing the wall.
12.Perform Y-direction self-check using the same method as the
X-direction (steps 6-10 above) and mark Point Ay, By, and 0y.
13.If the distance between points Ay and By is more than 3/16”
at 25’, the laser is out of calibration. Calibrate the laser by fol-
lowing the steps in the Accuracy Calibration section below. If
this distance is < 3/16” at 25’, and your X-axis is also within
the tolerance listed in Step 10, then your laser is in calibration.
Accuracy Calibration
1. Note: The laser should be turned off and the compensator
must be unlocked prior to making any adjustments
2. Remove the adjustment-hole bolts with a #1 Philips screw-
driver, and adjust the X direction fine-adjustment bolt in the
instrument core with a 3mm hex wrench until the top edge of
1658i-English_Manuals 1/11/17 11:50 AM Page 23
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