Johnson 40-6535 User manual

©2020 Johnson Level & Tool - Rev. 2 1
Electronic Dual-Slope Rotary Laser
Model Nos. 40-6535, 40-6541
Instruction Manual
Thank you for your purchase of this Electronic Dual-Slope Horizontal
Rotary 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 IIIa laser tool and is manufactured to comply with CFR 21,
parts 1040.10 and 1040.11 as well as international safety rule IEC 285.

2 ©2020 Johnson Level & Tool - Rev. 2
Table of Contents
1. Kit Contents
2. Features and Functions
3. Safety Instructions
4. Location/Content
of Warning Labels
5. Location of Parts/Components
6. Operating Instructions
7. Using the Product
8. Accuracy Check
9. Technical Specifications
10. Application Demonstrations
11. Care & Handling
12. Troubleshooting Guide
13. Product Warranty & Registration
14. Accessories
1. Kit Contents
Description for Model 40-6535 Qty.
Electronic Dual-Slope Rotary Laser 1
NiMH Rechargeable Battery Pack 2
Battery Charger 1
Remote Control with 9V Battery 1
Detector with 9V Battery 1
Instruction Manual 1
Hard-Shell Carrying Case 1
Description for Model 40-6541 Qty.
Electronic Dual-Slope Rotary Laser 1
NiMH Rechargeable Battery Pack 2
Battery Charger 1
Remote Control with 9V Battery 1
Detector with 9V Battery 1
Tripod 1
13’ Grade Rod 1
Magnetic Target 1
Tinted Glasses 1
Instruction Manual 1
Hard-Shell Carrying Case 1

©2020 Johnson Level & Tool - Rev. 2 3
2. Features and Functions
• ±5° electronic auto-level range with out-of-level indicator.
• ±8º dual slope range.
• Height of Instrument/TILT alarm function ensures product accuracy.
• Dust and rain resistant.
• Remote power off function.
• Included detector and remote control for more convenient operation.
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 IIIa Laser Product
Max. Power Output: ≤5mW
Wavelength: 625-645nm
THIS TOOL EMITS LASER RADIATION.
DO NOT STARE INTO BEAM.
AVOID DIRECT EYE EXPOSURE.

4 ©2020 Johnson Level & Tool - Rev. 2
4. Location/Content of Warning Labels
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.

©2020 Johnson Level & Tool - Rev. 2 5
5. Location of Parts/Components
Rotating laser emitting window
Handle
Keypad
DC Outlet Jack
Battery Cover

6 ©2020 Johnson Level & Tool - Rev. 2
6. Operating Instructions
IMPORTANT: It is the responsibility of the user to verify the
calibration of the instrument before each use.
Battery Installation
Note: Always check to be sure that the on/off switch is in the off
position before removing and replacing batteries.
NiMH Rechargeable Battery Pack Installation
1. Unscrew the battery cover bolt and remove
the battery cover.
2. Put 2 rechargeable battery packs into the
battery case and then insert the plug of the
battery pack lead-wire into the socket at the battery case.
3. Screw the battery cover bolt back on.
NiMH Rechargeable Battery Charging
Using the battery charger (included), charge the rechargeable battery
pack through the outlet jack. When the charge indicator lamp turns
from red to green (after approximately five hours), the NiMH
rechargeable battery pack has been fully charged.
Note:
(1) For the first two charges of new rechargeable batteries, it is
necessary to charge for 12 plus hours.
(2) The unit can still work during charging with the charger.
(3) Do not charge alkaline batteries to avoid explosion.
(4) Used (discharged) batteries are hazardous waste and should be
disposed of properly.

©2020 Johnson Level & Tool - Rev. 2 7
Before Using the Laser
When you charge the new battery or one which has not been used for
long periods of time, it may not reach full charge until after you have
discharged it fully in use and recharge it several times.
Instrument Usage
1. Put in NiMH rechargeable battery pack, or 4 “C” alkaline batteries (not
included), or connect to DC power through the outlet jack.
2. Place the instrument on a tripod, connect it to the tripod using the
5/8” screw thread at the bottom of the instrument.
Note: If the instrument is inclined beyond the self-leveling range, the
instrument will deliver an audible alarm. You will need to
re-position the instrument.
3. Press power switch to turn power on. Press buttons on remote control to
adjust for slope feature.
4. After finishing operation or before moving the instrument, turn the
power off.
Alkaline Battery Installation
1. Unscrew the battery cover bolt and remove the battery cover.
2. Put in 4 “C” alkaline batteries (not included) according to the
illustrated polarity direction.
3. Screw the battery cover bolt and battery cover back on the unit.

8 ©2020 Johnson Level & Tool - Rev. 2
7. Using the Product
Operating Panel
Power On/Off
1. Press the power button to power on. The
power indicator lamp will light up and then the
instrument will automatically level itself, with
rotation occurring once the unit is level.
2. Press the power button again to power off.
Low Battery Indication
If the battery indicator lamp is lit, this means low
battery voltage. To ensure normal operation, replace
batteries or charge the rechargeable NiMH battery pack.
Alarm If Beyond Range
If the instrument is inclined beyond the self-leveling
range of ±5° , it will deliver an audible alarm, and
the power indicator lamp will blink. You will need
to re-position the instrument until it is within the
leveling range.
Instrument Panel Remote Control Panel

©2020 Johnson Level & Tool - Rev. 2 9
Height of Instrument (Tilt Mode)
1. After powering on the instrument and entering into
auto-level status, press the tilt button. When the
indicator is on (see figure), the instrument enters
into TILT mode. If the leveled instrument is moved
or bumped, the head will stop rotation and the TILT indicator light and
laser beam will flash instead of the unit performing the auto-level
function. Press the tilt button on the panel or remote to quit the tilt
mode and enter into auto-level status.
2. Press the tilt button on the laser or remote again to enter the tilt mode.
Slope Adjusting Function (SLOPE)
This function must be operated by the remote control (see operating
panel shown in fig.1).
1. Select slope adjusting direction
The first press of X/Y button will illuminate the X indicator light (fig. 2).
The second press of X/Y button will illuminate the Y indicator light (fig.
3). The third press of the X/Y button will quit the slope-adjusting func-
tion and enter the unit into auto-level status.
2. Adjust the slope angle
When in either the x-axis or y-
axis, press either of the two
up/down arrow keys on remote
control (fig.1) to adjust slope
angle.
Note: A single press of either key
activates fine tuning while a
continuous pressing activates
quick adjustment.

10 ©2020 Johnson Level & Tool - Rev. 2
Adjust the inclination extent of the slope
Pressing the up/down arrow keys on the remote control, will adjust the
inclination of the instrument slope. A single press will cause a
slight adjustment and a continuous press will cause a quick adjust-
ment.
If laser is taken past its slope range (±8º), the laser will deliver an
audible alarm and the laser beam will flash and stop rotating.
Sleep Mode
1. The first press of the
POWER button on the
remote control (fig.4) will
make the instrument enter
sleep mode. The power indicator lamp on the panel is lit (fig.5),
the laser beam goes out, and the instrument head stops rotation.
2. The second press of the POWER button on the remote control will
make the instrument quit sleep mode and enter auto-level status.
Timed Power-off Function
Power instrument on and press the power key on the remote control,
the instrument will enter the sleep mode. Under the sleep mode, if
there is no operation for 30 minutes, the instrument will power off
automatically. Under sleep mode, press the power key on the
remote control to make the instrument start.

©2020 Johnson Level & Tool - Rev. 2 11
8. Accuracy Check
IMPORTANT: It is the responsibility of the user to verify the
calibration of the instrument before each use.
The instrument must be checked for accuracy before each operation.
If the accuracy is found to be out of tolerance, the laser should be
returned to Johnson or an authorized Johnson service center for
calibration.
Accuracy Check
1. Place the laser on a platform or tripod that is 50’ away from a
wall indoors, with the X-axis direction facing the wall. The X and
Y axes are marked on the top of the laser head. Power on the
laser.
2. Using the detector, mark the wall where the beam hits the wall as A.
3. Turn the instrument by 180 degrees, mark the beam on the wall
as point B.
4. Measure the vertical distance between point A and point B. If A &
B are more than 1/32” apart at 50’, the unit is out of calibration.
5. Turn the instrument 90° so the Y-axis is facing the wall, and
repeat steps 2 - 4 above to check the Y axis.
50’

12 ©2020 Johnson Level & Tool - Rev. 2
9. Technical Specifications
Laser Wavelength 635nm±10nm
Laser Classification Class IIIa
Maximum Power Output ≤5mW
Accuracy ±1/16"/100 ft.
Range Up to 200 ft. diameter
Detector Range Up to 2000 ft. diameter
Remote Range Up to 200 ft. diameter
Auto-Leveling Range ±5°
Slope ±8º
Power Supply Rechargeable NiMH battery pack with
charger (incuded) or 4 “C” alkaline bat-
teries (not included)
Battery Life 28 hours (NiMH)
33 hours (alkaline)
Dimensions 7.4" x 5.91" x 8.15"
Weight 5.51 lbs.
Working Temperature 14°F to 113°F
Center Screw Thread 5/8" – 11
Rotation Speed 800 rpm
IP Rating IP66

©2020 Johnson Level & Tool - Rev. 2 13
10. Application Demonstrations
This laser features a high-accuracy dual-slope head, and is well suit-
ed to a variety of leveling and grading tasks around your jobsite:
11. Care and Handling
•This laser unit is a precision tool that must be handled with care.
•Avoid exposing unit to shock vibrations and extreme temperatures.
•Before moving or transporting the unit, make sure that the unit is
turned off.
•Remove the batteries when storing the unit for an extended time
(more than three months) to avoid damage to the unit should the
batteries deteriorate.
•Always store the unit in its case when not in use.
•Avoid getting the unit wet.
•Keep the laser unit dry and clean, especially the laser output win-
dow. Remove any moisture or dirt with a soft, dry cloth.
•Do not use harsh chemicals, strong detergents or cleaning solvents
to clean the laser unit.

14 ©2020 Johnson Level & Tool - Rev. 2
12. Troubleshooting
Symptom
Will not turn on
Possible Cause
Batteries missing or
depleted
Polarity reversed
Solution
Change the batteries
Charge the batteries (if
equipped with
rechargeable batteries)
Check polarity
Turns off after a
short time
Batteries depleted
Battery pack required
reconditioning
(rechargeable batteries
only)
Rechargeable battery
pack has exceeded its
useful life
Change or charge the
batteries
Fully discharge batteries
by operating tool. Fully
charge batteries (12-14
hrs.) Repeat two more
times.
Replace rechargeable
battery pack.
Beam is difficult to
detect with laser
detector
Beam reflections or
object blocking detecton
window
Ensure your body is not
blocking the receiver
window
Ensure laser is not posi-
tioned near windows,
trucks, or other reflec-
tive panels

©2020 Johnson Level & Tool - Rev. 2 15
Symptom Possible Cause Solution
Laser light appears dim Batteries are weak
Improper battery type
Speed too high (indoor)
Ambient temperature
too high/low
Replace or recharge-
batteries
Ensure high quality
alkaline batteries are
used
For indoor operation,
operate on lowest
speed to give the most
visible beam
Ensure temperature is
within operating
range
Remote control will not
function
Batteries depleted
Laser powered down
more than 30 minutes
Remote out of operating
range
No line of sight to laser
Replace batteries
Laser must be woken
up by manually turning
on power from main
control panel
Move closer to the laser
Position yourself so no
objects are between you
and the laser

16 ©2020 Johnson Level & Tool - Rev. 2
13. Product Warranty & Warranty Registration
Johnson Level & Tool offers a three year limited warranty on this
product. Warranty details are available at www.johnsonlevel.com. The
warranty is limited to repair and/or replacement of the product only.
Repairs completed by a non-authorized servce center will void your war-
ranty. A list of service centers can be found on our web site.
NOTE: The user is responsible for proper use, care, and ensuring the calibra-
tion of the instrument before each use.
Customer Service Department (USA): 888-953-8357.
Customer Service Department (CANADA): 800-346-6682.
Please register within 30 days of purchase. Registering ensures we
have your information on file for warranty service even if you lose your
receipt, and lets us contact you if there is ever a product recall. We will
never sell your information and only send you marketing information if
you opt-in. To register, go to www.johnsonlevel.com/register.
14. Accessories
Johnson®accessories are available for purchase through authorized
Johnson®dealers. Use of non-Johnson®accessories will void any
applicable limited warranty and there will be NO WARRANTY. If you need
any assistance in locating any accessories, please contact our
Customer Service Department at:
888-953-8357 (USA)
or
800-346-6682 (Canada)