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5. Position the instrument on the other side of the door opening directly behind point b. Allow
the instrument to self-level and ensure the vertical laser line aligns with points a and b.
6. Mark the center of the vertical line at the upper edge of the door opening (point c2).
7. Measure the distance between points c1 and c2 at the upper edge of the door opening
that indicates the actual deviation of the instrument from the vertical plane.
If the actual deviation is greater than the allowable deviation for the corresponding Ceiling
Height in the table below, the instrument must be serviced.
Ceiling Height
7' (2.1m)
10' (3m)
15' (4.5m)
c1
c2
b
a
Allowable Deviation
1/16" (1.6mm)
1/8" (3.2mm)
3/16" (4.78mm)
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5. TROUBLESHOOTING
Problem
Possible Cause
Batteries are not inserted
Incorrect battery polarity
No Laser
Low charge or depleted batteries
Beam
Corroded battery terminals
Defective Instrument
Instrument tilted beyond its ± 4°
self-leveling range
Depleted batteries
Fluctuating
Beam
Temperature is too low or too high
Debris on the Laser Beam Window
Does Not
Instrument is placed on an inclined
Self-Level
surface (beyond ± 4°)
2
Cannot
Pendulum Switch
is in
Power-OFF
the UNLOCK position.
Out of Level
Laser Beam out of leveling
Laser Beam
calibration
Solution
Insert 3 x AA batteries
Check battery polarity
Replace with new batteries
Clean the battery terminals
Contact ToughBuilt
®
Customer Service
Reposition the instrument
Replace with new batteries
Allow the instrument to cool down
or warm up
1
Clean the window with a damp lint-free cloth
Place the instrument on a level surface
Slide the Pendulum Switch
2
to the LOCK position, then press
the Power ON/OFF button
5
.
Perform the accuracy check
(see the Accuracy check section)
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