Johnson 40-6646 User manual

©2017 Johnson Level & Tool 1
Self-Leveling 3 Dot Laser
Model No. 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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Table of Contents
1. Features and Functions
2. Safety Instructions
3. Location/Content
of Warning Labels
4. Location of Parts/Components
5. Operating Instructions
6. Accuracy Check Instructions
7. Application Examples
8. Troubleshooting Guide
9. Technical Specifications
10. Product Warranty
11. Warranty Registration
1. Features and Functions
• Simultaneously projects three laser beams (front, up and down)
to check plumb and level.
• agnetic 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.
• Locking compensator helps protect the tool’s inner mechanisms.
• Dust resistant construction.
• Tripod thread for convenience.
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2. 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 Laser Product
ax. Power Output: ≤1mW
Wavelength: 635nm
THIS TOOL EMITS LASER RADIATION.
DO NOT STARE INTO BEAM.
A OID DIRECT EYE EXPOSURE.
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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3. Location/Content of Warning Labels
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4. Location of Part/Components
Locking
Compensator/
Power Switch
Battery
Cover
Release
Status Light
1/4″-20 Tripod Thread
(underneath, not shown)
Laser
Output
Windows
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5. Operating Instructions
IMPORTANT: It is the responsibility of the user to ensure proper
maintenance of the Self-Leveling 3 Dot Laser. 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-Leveling 3 Dot Laser optic lens clean and
inspect for damage.
Battery Installation
To install batteries in the Self-Leveling 3 Dot Laser:
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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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-Leveling 3 Dot Laser 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 be flashing 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 on.
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: Laser 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-Leveling 3 Dot Laser 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.
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6. Checking Accuracy
IMPORTANT: It is the responsibility of the user to verify the
calibration of the instrument before each use.
Checking Plumb Accuracy
1. Place the laser on a flat surface in as tall of a room as possible.
20′or higher is ideal. In shorter rooms, a mirror can also be used
on the ceiling to reflect the beam back to the ground to give a
longer effective distance.
2. Turn on the laser. ark the center of the plumb down beam as
Point O. ark the center of the plumb up beam as Point A.
3. Rotate the laser 90 degrees, aligning the plumb down beam with
Point O. ark the plumb up beam as Point B.
4. Rotate another 90 degrees and align the plumb down over Point
O. ark the plumb up as Point C.
5. Rotate another 90 degrees and align the plumb down over Point
O. ark the plumb up as Point D.
6. This will establish 4 points on the ceiling (A, B, C and D), that
should either perfectly superimpose or form a very small circle.
easure the diameter of this small circle. The laser is in tolerance
if the circle is equal to or smaller than:
• 3/64″for a 10′ceiling
• 3/32″for a 20′ceiling, or reflected by a mirror from a
10′ceiling.
• 1/16″for a 30′ceiling, or reflected by a mirror from a
20′ceiling.
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Checking Level Accuracy
• Set the instrument on a level surface such as a tripod, located
between two walls (labeled Wall 1 and Wall 2), located a minimum
of 25′apart (see Fig 1). The laser should be as close as possible
to Wall 1.
• Point the instrument at Wall 1. Turn the laser
on, and mark the beam as Point A. Rotate the
instrument 180 degrees so the laser is pointed
at Wall 2. ark the beam on Wall 2 as Point B.
• ove the instrument and the tripod so the
laser is positioned as close as
possible to Wall 2 near Point B (see
Fig 2). Level the tripod and position the
instrument on the tripod facing Wall 2. Turn the
laser on, and mark the beam as Point C. Point C should be directly
above or below Point B.
• Turn the laser off and rotate the laser 180 degrees so that it is
facing directly to Wall 1.Turn on the laser, and mark the beam as
Point D. Point D should be directly above or below Point A.
• easure the vertical distance between Points A and D.
• easure the vertical distance between Points B and C.
• If the larger of the two differences measured above is less than
1/4″at 25′, your instrument is within tolerance.
Note: This accuracy checking method doubles the error. For example,
if the difference between Point A and Point D is 1/4″at 25′, your
laser is accurate to 1/8″at 25′.
Wall 1 Wall 2
Fig 1
Fig 2
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