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.