Congratulations on your choice of this Self-Leveling Rotary Laser
Level. We suggest you read this instruction manual thoroughly before
using the instrument. 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. Turn the vertical adjustment knob to center the bubble in the
vertical vial.
7. Using the Product
Keypad
Rotating speed
switch key
Low speed LED
Middle speed LED
High speed LED
When the laser is in the horizontal position, the laser will not
power on until the compensator/transportation lock knob is
turned to the “On” position.
Power Key
Power LED
Power Key: Press this key to power on/off the laser.
Power LED: Lighted LED mean power-on
Extinguished LED means power-off
Flashing LED means weak battery voltage
Note: When starting the unit, the laser will be in the high-speed rotating status.
When switching the rotating speed, the corresponding LED will light up.
400 (M)
Middle speed
200 (L)
Low speed
Out of Level
Set the lock knob to the on position. Power on. During the process of
self-leveling, if the laser is tilted to exceed its self-leveling range, it
will stop rotating and will give a sound alarm.
• Aim the receiving window at the
rotating laser. Loosen the clamp bolt
and move the detector up and down
to receive the laser scanning signals
transmitted by the rotating laser.
• When the detector displays like Fig. (A),
move the detector slightly down as
indicated by the arrow. When it displays
like Fig. (B), move it slightly up as
indicated by the arrow.
• When Fig. (C) is displayed, the detector is level with the rotating
laser beam.
• Tighten the clamp bolt and note the position on the grade rod by the
rabbet. This mark will be the horizontal reference in the coarse mode.
2. Fine detection
1. power symbol
2. fine detection symbol
• Press coarse/fine detection button. The
detector is ready for fine detection.
• Move the detector slightly up and down
like the coarse detection procedure.
Figure 6
• When the detector displays like Fig 6, it is
level with the rotating laser beam.
• Tighten the clamp bolt and note the position on the grade rod by the
rabbet. This mark will be the horizontal reference in the fine detection.
• If the detector is working in a circumstance that makes it difficult to
use the display function, the sound function can be used instead.
• Press the sound function button. The sound symbol is displayed
which means it is in sound mode.
• When the sound signal has a rapid sound, move the detector
slightly up.
• When the detector has a short sound, move it slightly down.
• When the detector makes a continuous sound, it is level with the
rotating laser beam.
• If there is no sound heard, the detector is not receiving a laser
signal.
(f) Turn-off timer
• The detector will automatically turn off if it has not received laser
signal for 10 minutes
(g) Detector Maintenance
• When you are done using the detector, return it to its carrying case.
• Keep the detector, particularly the detecting window, clean. If
detector becomes dusty, use a clean cloth to gently wipe it clean.
• Avoid knocking the detector over or allowing it to fall on the
ground.
• Although the detector is rain resistant, you should avoid
submerging the unit in water or other liquids. If the detector
comes into contact with water or other liquids, wipe it dry
immediately.
• Do not use detector around fire or expose it to fire in any way.
When first turning the detector on, the middle signal
indicator turns red first and then turns green. If the
horn gives two short sounds and the detector powers
off automatically, it means that the battery voltage is
seriously low and it is necessary to replace the battery
immediately. When turning the power on and the down
signal indicator flashes, it means that the battery is low
and it is necessary to replace the battery.
1. Open the battery cover and put
the batteries into the battery case
according to the polarity shown in
the battery slot.
2. Slide the battery cover back.
Note: Take the batteries out when the unit is not in use for a
long time.
4. Detecting Methods
1. This detector can detect a red rotating laser beam.
2. Press the Power Key once , the middle signal indicator will
quickly turn red first and then turns green. It will beep once
to indicate that the detector is ON.
While detecting, the signal indicators show as follows:
1. While detecting a horizontal laser beam, it is necessary to
have the horizontal bubble vial centered, as the tilt of the
detector will influence its receiving accuracy.
Horizontal Vial
2.Keep the detecting window facing
the rotating laser.
3.Keep the detector still while
detecting the laser beam
4.When the laser beam is centered,
mark at the front reference marker.
5. When the detector does not
receive a laser signal for 6
minutes, and there are no
buttons pushed during these
6 minutes, the middle signal
indicator will turn green first
and then turn red. The horn
will give two short sounds and
the detector will power off automatically.
• Keep the detector, particularly the detecting window, clean. If unit
becomes dusty, use a clean cloth to gently wipe it clean.
• Avoid knocking the detector over or allowing it to fall on the
ground.
• Although the detector is rain resistant, you should avoid
submerging the unit in water or other liquids. If detector comes
into contact with water or other liquids, wipe it dry immediately.
• Do not use detector around fire or expose it to fire in any way.
IMPORTANT: It is the responsibility of the user to verify the
calibration of the instrument before each use.
25’
X&Y-Direction Accuracy Self-Check
1. Note X & Y-direction as indicated on top of laser.
2. Place the laser on a platform that is 25’ away from a wall
indoors. Position the laser so the X-direction is facing the
wall. Unlock the laser and set to low speed.
3. Mark on the wall where the beam hits the wall and mark that as A.
(Note: This test should be done indoors with dim lighting. It’s
critical that the laser mark is easily seen.)
4. Turn the laser by 180 degrees, mark the beam as point B.
5. Measure the vertical distance between point A and point B. If A &
B are more than 1/16” apart at 25’, the laser is out of calibration.
6. Turn the laser 90° and place it on the platform. Position the
laser so the Y-direction is facing the wall. Perform Y-direction
self-check with the same method as X-direction self-check,
and mark point C and point D by turns.
7. If point C and point D are within 1/16” at 25’, the accuracy is
within tolerance.
Accuracy Calibration
1. As shown in the following figures, screw off the adjustment-hole
bolt with the cross screwdriver, and adjust the fine-adjustment
bolt in the instrument core with a flat head screwdriver until the
laser line in within 1/8” at 50’.
2. Adjust the X-direction and the Y-direction with the same method.
Note: The laser should be turned off and the compensator
must be locked prior to making any
adjustments. If the accuracy is
beyond tolerance, calibrate the
X-direction through the adjustment
hole as shown.
3. After X is calibrated, rotate the
instrument 90º to calibrate the Ydirection.
Note: The alkaline batteries
must be removed to access the
instrument core with a flat head
screwdriver.
Note: If you fail to calibrate the accuracy according to the above
steps, please contact Johnson Level & Tool for service.
9. Technical Specifications
Laser Wavelength635nm±10nm
Laser ClassificationClass IIIa
Maximum Power Output≤5mW
Accuracy±1/8"/50 ft. (±2mm/10m)
Interior RangeUp to 200 ft (60m) diameter depending
upon light conditions
Exterior RangeUp to 800 ft (240 m) diameter with detector
Self-Leveling Range±3°
Power Supply4 “AA” alkaline batteries (included)
Battery LifeApprox. battery life 20 hours continuous use
Dimensions5” x 6 1/2” x 6 1/2” (126x170x168mm)
Weight3.3 lbs (1.5 Kg)
Working Temperature14°F to 113°F (-10°C to +45°C)
Center screw thread5/8" – 11
Rotation Speed200 rpm, 400 rpm, 600 rpm
IP protection class54
•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
window. 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.
12. Product Warranty
Johnson Level & Tool offers a three year limited warranty on each of its
products. You can obtain a copy of the limited warranty for a Johnson
Level & Tool product by contacting Johnson Level & Tool's Customer
Service Department, as provided below, or by visiting our web site at
www.johnsonlevel.com. The limited warranty for each product
contains various limitations and exclusions.
Do not return this product to the store/retailer or place of purchase.
Non-warranty repairs and course calibration must be done by an
authorized Johnson
®
service center or Johnson Level & Tool's limited
warranty, if applicable, will be void and there will be NO WARRANTY.
Contact one of our service centers for all non-warranty repairs. A list