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Thank you for purchasing this Johnson laser detector! This laser
detector locates red beam (635/650nm) rotary lasers and is ideal for
outdoor and indoor jobsites, large or small, where it’s dicult to see
the laser beam with the naked eye.
This detector features coarse and fine accuracy modes. For rough
work such as excavation, the coarse mode makes it quicker and
easier to detect the laser beam. For critical work such as checking
formwork or floor heights, the fine mode allows precise location of
the laser beam.
This laser detector features:
• Accuracy of 0.04” (fine mode)
• Accuracy of 0.1” (coarse mode)
• LCD display to show grade position
• Audio indicator with volume control
• 10-minute auto-o timer
• Grade rod clamp
• Dust and rain resistant construction
40-6700 Laser Detector Operator’s Manual
www.johnsonlevel.com/manuals
INSERTING BATTERIES
1. Remove the battery cover by depressing gently on the battery
door arrow and sliding the cover in the direction indicated by the
arrow. Lift the exposed end, and remove the cover.
2. Attach a 9V battery to the battery connector, and press the
battery into the housing.
3. Replace the battery cover.
INTERPRETING THE LCD DISPLAY
GETTING STARTED
1. Insert the included 9V battery. See “INSERTING BATTERIES.”
2. Attach the detector to the included clamp (if using a grade rod)
or remove the clamp if using the detector on a standalone basis.
3. Press
to turn on the detector.
4. Press
to enable or disable the audio indicator. When
enabled, the audio indicator icon will be displayed on the LCD.
5. Set coarse or fine accuracy by pressing
. The LCD will
indicate the accuracy mode as follows:
6. Operate the detector. See “USING THE DETECTOR.”
7. When you are finished using the detector, power it o by
pressing
. This detector will also automatically power o
after 10 minutes of inactivity (no buttons pressed or laser signals
received).
COARSE FINE
1. POWER ICON - Indicates the detector is on
and ready to receive laser signals.
2. LOW BATTERY INDICATOR - Indicates it is
time to change the battery.
3. ACCURACY - Indicates coarse or fine
accuracy mode. Coarse accuracy is +/-0.1”,
and fine accuracy is +/- 0.04”.
4. VOLUME - Indicates sound is enabled.
COARSE FINE
5. BEAM LOCATION INDICATOR - Indicates the direction to move
the detector to find the laser beam. If no laser beam is detected
in the detection window, this display will be blank.
MOVE UP MOVE DOWN ON GRADE
PRESS & SLIDE LIFT REMOVE
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www.johnsonlevel.com/manuals
USING THE DETECTOR
1. Follow the instructions in “GETTING STARTED” to prepare the
detector for use and set your desired accuracy mode.
TIP: If the rotary laser you are using has multiple rotational speed
options, use the highest speed when working with the detector.
This will make it easier to locate the laser beam.
2. Position the detector so the detection window is facing the laser
and nothing (including your own body) is in between the detector
and the laser.
TIP: Be cautious of laser reflections from windows, trucks and
other surfaces that can cause laser reflection and erroneous
signals.
3. Move the detector perpendicular to the plane of laser light until
you begin to locate the beam. The detector will beep (if sound
is enabled), and the LCD beam location indicator will appear. If
you’re having trouble finding the beam initially, make sure you are
using a slow, steady motion to move the detector.
GRADE ROD CLAMP
GRADE POSITION
INDICATORS
LCD DISPLAY
VOLUME BUTTON
DETECTION WINDOW
ACCURACY BUTTON
POWER BUTTON
GRADE ROD (NOT INCLUDED)
4. Continue to move the detector up or down until you locate grade.
You will receive both visual cues and audio cues (if enabled)
regarding which direction to move the detector to locate grade:
MOVE UP MOVE DOWN ON GRADE
(FAST BEEP) (SLOW BEEP) (SOLID TONE)
Use the grade position indicators to read or mark grade:
IF USING A GRADE ROD: Read the top edge of the grade
position indicator on the grade rod clamp (indicated by the blue
line in the image below). In this image of a ft/100’s (engineer’s
scale) grade rod, the grade reading would be 0.74’.
IF NOT USING A GRADE ROD:
Read grade position using the grade
position indicator on the housing of
the laser detector (shown in the blue
circle in the image to the left).
For your convenience, the dual raised
edges will help center a pencil, marker
or other marking tool so that you can
mark the grade position directly on
your work surface.
0.74’
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