Johnson 40-6648 User manual

©2017 Johnson Level & Tool 1
Self-Leveling Cross and Line Laser
Model No. 40-6648
Instruction Manual
Congratulations on your choice of this Self-Leveling Cross and Line
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©2017 Johnson Level & Tool
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. Checking Accuracy
7. Application Examples
8. Troubleshooting Guide
9. Technical Specifications
10. Product Warranty
11. Warranty Registration
1. Features and Functions
• Projects up to three laser beams simultaneously to plot both
crosslines and a plumb line, or either line individually.
• Tilt mode can be used to plot orthogonal reference lines at
any angle.
• Magnetically dampened compensator system stabilizes the
pendulum quickly and accurately, and stays level even with
nearby jobsite vibration.
• Status light alerts you to when the tool is beyond its leveling
range.
• Locking mechanism protects the pendulum during transportation.
• 1/4″-20 tripod thread for use with most common tripods.
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2. afety 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
Max. Power Output: ≤1mW
Wavelength: 635nm
THI TOOL EMIT LA ER RADIATION.
DO NOT TARE INTO BEAM.
AVOID DIRECT EYE EXPO URE.
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.
• eep 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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4©2017 Johnson Level & Tool
3. Location/Content of Warning Labels
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©2017 Johnson Level & Tool 5
4. Location of Parts/Components
Status Light
Locking
Compensator/
Power Switch
Battery Cover
Release Tab
Battery Cover
Release Tab
Battery
Cover
Tilt Mode
Button
Crossline Laser
Output Window
Plumb Line
Laser Output
Window
1/4″- 20 Tripod
Thread
(underneath, not shown)
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6©2017 Johnson Level & Tool
5. Operating Instructions
IMPORTANT: It is the responsibility of the user to ensure proper
maintenance of the Self-Leveling Cross and Line 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. eep the Self-Leveling Cross and Line Laser optic lens
clean and inspect for damage.
Battery Installation
To install batteries in the Self-Leveling Cross and
Line Laser:
1. Remove the battery cover, which is located at the
back of the tool, by pressing the battery cover
release tabs 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. Press in the release
tabs as you insert them into the tool housing.
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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Using the Product in elf-Leveling Mode
1. Slide the locking compensator up to the unlocked position to
power on the unit. The status light will illuminate, and the unit will
emit both a crossline and a 90° vertical (plumb) line.
2. Press the tilt mode button once to produce only the crossline.
3. Press the tilt mode button a second time to produce only the 90°
vertical (plumb) line.
4. Press the tilt mode button a third time to again produce both a
crossline and a 90° vertical (plumb) line.
5. Slide the locking compensator down to the locked position to
power off the unit.
Note: The Self-Leveling Cross and Line Laser must be within ±4°
of level for the self-leveling feature to function properly. If the
instrument is beyond its 4° 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 4° self-leveling range,
the laser will self-level, the status light will turn green and the laser
light will stop flashing and remain solid.
Using the Product in Tilt (Manual Level) Mode
The Crossline with 90º Plumb Line Laser can be used to project laser
beams at any angle desired, such as when projecting a line for stairs
or a railing. This mode produces the best results when the tool is
mounted on a tripod.
1. With the locking compensator down in the locked position, tap
the tilt mode button to power on the unit. The status light will
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illuminate in red, and the unit will emit both a crossline and a
90° vertical (plumb) line.
Note: Relative orthogonal alignment of each of the beams will not
change from self-leveling mode, but the entire laser assembly will
not self-level.
2. Press the tilt mode button a second time to produce only the
crossline.
3. Press the tilt mode button a third time to produce only the vertical
(plumb) line.
4. Press the tilt mode button a fourth time to power off the unit.
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.
8©2017 Johnson Level & Tool
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Care and Handling
• This Self-Leveling Cross and Line 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.
• eep 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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10 ©2017 Johnson Level & Tool
6. Checking Accuracy
IMPORTANT: It is the responsibility of the user to verify the
calibration of the instrument before each use.
Plumb Accuracy Check
Plumb accuracy can be checked in two ways. The easier, though less
accurate, method is to project the beam on a flat wall and use a
plumb bob to check the plumb of the beam.
The more accurate method to check the plumb line accuracy is to
follow these steps:
1. Place the laser on the floor in a fairly
dark room, approximately 10′from a
doorway.
2. Project the plumb beam through the
doorway.
3. Mark the plumb beam’s closet point to
the tool on the floor as Point 1.
4. Mark a spot 20′away as Point 2.
5. Mark directly under the doorway as Point C.
6. Mark a spot directly above Point C, but on the doorway, as point D.
7. Move the laser to Point 2, and aim the plumb beam directly
through Point 1 and Point C.
8. Mark on the doorway Point E.
9. Measure the distance between Point D and Point E. If this
distance does not exceed 1/8″for a 10′high doorway, then the
tool is properly calibrated.
1
2
C
DE DE
C
E
C
2
1
1
1
1
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