Johnson 40-6641 User manual
©2018 Johnson Level & Tool - Rev. 1 1
Self-Leveling 3 Dot Laser
Model Nos. 40-6641, 40-6643, 40-6646
Instruction Manual
Congratulations on your choice of this Self-Leveling 3 Dot Laser. We
suggest you read this instruction manual thoroughly before using the
instrument and save this instruction manual for future use.
This is a Class II laser tool and is manufactured to comply with CRF 21,
parts 1040.10 and 1040.11 as well as international safety rule IEC 285.
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2©2018 Johnson Level & Tool - Rev. 1
Table of Contents
1. Kit Contents
2. Features and Functions
3. Safety Instructions
4. ocation/Content
of Warning abels
5. ocation of Parts/Components
6. Operating Instructions
7. Checking Accuracy
8. Application Examples
9. Troubleshooting Guide
10. Technical Specifications
11. Product Warranty
12. Warranty Registration
1. Kit Contents
Description for Model 40-6646 Qty.
Self- eveling 3 Dot aser
1
“AA” Alkaline Batteries 2
Description for Model 40-6641 & 40-6643 Qty.
Self- eveling 3 Dot aser
1
Magnetic Bracket 1
Tinted Glasses 1
Magnetic Target 1
“AA” Alkaline Batteries 2
Hard-Shell Carrying Case 1
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©2018 Johnson Level & Tool - Rev. 1 3
2. Features and Functions
• Simultaneously projects three laser beams (front, up and down)
to check plumb and level.
• Magnetically dampening compensation system stabilizes
pendulum quickly and accurately, and stays level even with
nearby vibration on the job site.
• Visual out of level indicator alerts you to when the tool is beyond
its leveling range.
• Clearance for all common drywall track materials and 2x
dimensional lumber.
• ocking compensator helps protect the tool’s inner mechanisms.
• Dust resistant construction.
• Tripod thread for convenience.
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4©2018 Johnson Level & Tool - Rev. 1
3. Safety Instructions
Please read and understand all of the following instructions, prior
to using this tool. Failure to do so, may void the warranty.
DANGER!
Class II aser Product
Max. Power Output: ≤1mW
Wavelength: 635nm (40-6643 & 40-6646)
THIS TOOL EMITS LASE ADIATION.
DO NOT STA E INTO BEAM.
AVOID DI ECT EYE EXPOSU E.
DANGER!
Class II aser Product
Max. Power Output: ≤1mW
Wavelength: 520nm (40-6641)
THIS TOOL EMITS LASE ADIATION.
DO NOT STA E INTO BEAM.
AVOID DI ECT EYE EXPOSU E.
CAUTION
Maximum Power < 1mW
Wavelength 520nm
Class II laser product
LASER RADIATION-DO NOT STARE
INTO THE BEAM OR VIEW DIRECTLY
WITH OPTICAL INSTRUMENTS
This device complies with 21 CFR chapter 1,
Subchapter J, CFR1040.10 and 1040.11
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©2018 Johnson Level & Tool - Rev. 1 5
ATTENTION IMPORTANT
• Read all instructions prior to operating this laser tool. Do not remove any labels from tool.
• Do not stare directly at the laser beam.
• Do not project the laser beam directly into the eyes of others.
• Do not set up laser tool at eye level or operate the tool near a reflective surface as
the laser beam could be projected into your eyes or into the eyes of others.
• Do not place the laser tool in a manner that may cause someone to unintentionally
look into the laser beam. Serious eye injury may result.
• Do not operate the tool in explosive environments, i.e. in the presence of gases or
flammable liquids.
• Keep the laser tool out of the reach of children and other untrained persons.
• Do not attempt to view the laser beam through optical tools such as telescopes as
serious eye injury may result.
• Always turn the laser tool off when not in use or left unattended for a period of time.
• Remove the batteries when storing the tool for an extended time (more than 3 months)
to avoid damage to the tool should the batteries deteriorate.
• Do not attempt to repair or disassemble the laser tool. If unqualified persons attempt
to repair this tool, warranty will be void.
• Use only original Johnson®parts and accessories purchased from your Johnson®
authorized dealer. Use of non-Johnson®parts and accessories will void warranty.
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6©2018 Johnson Level & Tool - Rev. 1
4. Location/Content of Warning Labels
CAUTION
Maximum Power < 1mW
Wavelength 520nm
Class II laser product
LASER RADIATION-DO NOT STARE
INTO THE BEAM OR VIEW DIRECTLY
WITH OPTICAL INSTRUMENTS
This device complies with 21 CFR chapter 1,
Subchapter J, CFR1040.10 and 1040.11
40-6643
40-6646
40-6641
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©2018 Johnson Level & Tool - Rev. 1 7
5. Location of Parts/Components
ocking
Compensator/
Power Switch
Battery
Cover
Release
Status ight
1/4″-20 Tripod Thread
(underneath, not shown)
aser
Output
Windows
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8©2018 Johnson Level & Tool - Rev. 1
6. Operating Instructions
IMPO TANT: It is the responsibility of the user to ensure proper
maintenance of the Self- eveling 3 Dot aser. Conduct periodic
test measurements to ensure the instrument is measuring
accurately and consistently. This is most important if the
instrument has been exposed to extreme temperatures or
moisture. Keep the Self- eveling 3 Dot aser optic lens clean and
inspect for damage.
Battery Installation
To install batteries in the Self- eveling 3 Dot aser:
1. Remove the battery cover, which is located at
the back of the tool, by pressing the battery
cover release found on the left and right side of
the tool and pulling the cover back.
2. Insert 2 “AA” batteries into the battery compart-
ment according to the polarity illustrated inside.
3. Replace the battery cover by seating the bottom door edge first,
then pivoting the battery cover up. Press in the release tabs to
clear the housing as the door closes.
Notes:
• Always check that the locking compensator/power switch is in the
locked position before removing and replacing batteries.
• Use only alkaline batteries.
• Remove the batteries when storing the instrument for an extended
time (more than 3 months) to avoid damage to the tool should the
batteries deteriorate.
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©2018 Johnson Level & Tool - Rev. 1 9
Powering the Laser On/Off
Slide the locking compensator up to power on the unit and unlock
the compensator so that the laser can self-level. The status light
will illuminate, and the unit will emit three laser beams (up, front
and down).
Slide the locking compensator down to power off the unit and
engage the pendulum lock. The laser can be safely transported when
the pendulum is locked.
Note: The Self- eveling 3 Dot aser must be within ±5° of level for
the self-leveling feature to function properly. If the instrument is
beyond its 5° self-leveling range, the laser will not self-level, the
laser will flash and the status light will turn red. Once the instrument
has been adjusted to within its 5° self-leveling range, the laser will
self-level, the status light will turn green and the laser light will stop
flashing and remain solid.
Tips from the Pros
• Increasing the Beams’ Visibility – When working in bright
conditions, such as when working near windows or outside walls,
the visibility of the laser beams can be maximized by following
these steps:
• Work towards the laser.
• Use a freestanding target (sold separately).
• Wear laser glasses (sold separately).
Note: aser glasses enhance beam visibility but should never be
used to stare into the beam or be used as safety glasses. Eye
damage may result if these directions are not followed.
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Care and Handling
• This Self- eveling 3 Dot aser is a precision tool that must be
handled with care.
• Avoid exposing unit to shock vibrations and extreme temperatures.
• Remove the batteries when storing the unit for an extended time
(more than 3 months) to avoid damage to the unit should the
batteries deteriorate.
• Avoid getting the unit wet.
• Keep the laser unit dry and clean, especially the laser output
window. Remove any moisture or dirt with a soft, dry cloth.
• Do not use harsh chemicals, strong detergents or cleaning
solvents to clean the unit.
10 ©2018 Johnson Level & Tool - Rev. 1
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