Johnson Level & Tool Mfg. 40-6530 - Manual (Page 15)

©2005 Johnson Level & Tool 15
(f) Turn-off timer
• The instrument will automatically turn off if it has not received
laser scanning signal for 5 minutes
(g) Illuminator system
• There is an illuminator system at the right-faced display window.
Press the illuminator button which will illuminate the display window.
8. Self-Check and Calibration
X-Direction Accuracy Self-Check
1. For clarity, we define the direction of handle as X-direction,
and another direction as Y-direction
2. Place the unit on a platform that is 30 feet (10m) away from a
wall indoors, with the handle facing the wall head-on. Unlock
the unit and adjust it to the quick-scan status.
3. Draw one vertical line on exactly front wall, which intersection
with the laser line can be marked as point A.
(Note: This test should be done indoors with dim lighting It’s
critical that the laser mark is easily seen)
4. Turn the instrument by 180 degrees, mark the intersection of
vertical line and laser line as point B, and also mark the center
of point A and point B as point 0.
Wall
40-6520_6530 4/20/05 4:12 PM Page 15