Johnson 1760-2400 User manual

©2017 Johnson Level & Tool 1
24″and 48″Electronic Digital Level
Model Nos. 1760-2400 & 1760-4800
Instruction Manual
Congratulations on your choice of this Digital Level. We suggest you
read this instruction manual thoroughly before using the instrument.
Save this instruction manual for future use.
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2©2017 Johnson Level & Tool
Table of Contents
1. Kit Contents
2. Features and Functions
3. ocation of Parts/Components
4. Operating Instructions
5. Using the Product
6. Calibration
7. Technical Specifications
8. Care and Handling
9. Product Warranty
1. Kit Contents
Description Model Nos. 1760-2400 & 1760-4800 Qty.
Electronic Digital evel 1
Instruction Manual 1
Carrying Case 1
2. Features and Functions
• Angle inclination in 5 construction languages - units of measure
(degrees, percent, in/ft (fractional), in/ft(decimal), mm/m)
• Self-calibrate
• Automatic digit inversion for overhead measurements
• Reference function making any slope “0.0”
• Hold function locks measurement on the CD
• Working range on angle measurement 4 x 90º
• SurroundView®vials reflect ambient light for easy-read
• Two vials read plumb and level
• Bright CD backlight
• Audible and visual plumb and level indicators
• Shock absorbing end-caps
• arge hand grips fastened with screws
• Rigid aluminum box frame profile
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3. Location of Part/Components
CD Display
Window
Keypad
Hand Hole
End-cap
Plumb Vial
evel Vial
End-cap
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4. Operating Instructions
Battery Installation
1. Turn the digital level off.
2. Open the battery panel by removing the battery panel screw.
3. Remove the old batteries and put in new ones.
4. Turn on the unit to see if all functions are correct.
Note:
1. Be careful to follow the polarity symbol when replacing the
batteries.
2. Take out the batteries if the digital level is not going to be used
for a long time.
IMPO TANT: It is the responsibility of the user to verify the
calibration of the instrument before each use.
Battery Panel Screw
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5. Using the Product
Key Guide
ON/OFF Button
Push this button once to turn on the digital level. Push this button
again to turn the digital level off.
Mode Button
Push this button once to switch from one unit of measure to another.
This controls which unit of measure your digital level will measure in.
Your level has the capability to measure in degrees, percentage of
slope, inches/feet in fractions, inches/feet in decimal and millimeters/
meters. A symbol at the top of the CD will show which unit of
measure you are currently in.
Direction
Arrow Symbol
On/Off Button
Mode Button
Sound Button Reference
Button
Hold
Button
Calibrate Button
CD Backlight
Button
Sound Symbol Hold Symbol
Percent Symbol
Reference Symbol
Degree Symbol Battery Symbol
inch/feet
Symbol
millimeters/
meter Symbol
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Push and hold this button in for 3 seconds and then release to enter
the automatic shut off mode (5 minutes or 2 hours). When the button
is held in for 3 seconds and released the CD will show a “5”
blinking 3 times and then return to the regular display, the automatic
shut off is now set to 5 minutes. When the button is held in for
another 3 seconds and released the CD will show a “2H” blinking
3 times and then return to the regular display, the battery symbol will
be displayed as a reminder that the digital level is now set for 2
hours. The default setting is for automatic shut off in 5 minutes.
NOTE: When the battery is low (less than 5%) the digital level will
default to 5 minute automatic shut off, the battery symbol will begin
to flash and there will be no response to pushing this button in for
3 seconds.
eference Button
Push this button once to enter Reference Mode. The reference
function allows for setting any angle or slope to “0.0”. This is very
useful for measuring the same slope continuously during a project
or finding the difference between two slopes. To set the reference
function, position the level at the desired angle you wish to measure.
Press and release the reference button. REF will appear on the
screen while in the reference mode and the numbers will go to 0.0.
Set the level on the second surface to measure the difference
between the first and second surface. To exit this reference mode,
press the reference button again.
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Hold Button
Push this button once to enter hold mode. Pressing this button once
will lock the current angle reading displayed on the CD. The word
HO D will appear at the top of the display to remind you that you are in
the HO D function. Press this button once again to exit the hold mode.
Sound Button
Push this button once to enter the sound function mode. The sound symbol
will appear on the CD and there will be 4 different types of sound.
1. Between 10° - 5° or 80°- 85° there is a slow beep
2. Between 4.9° - 1° or 85.1° - 89° there is a faster beep
3. Between 0.9° - 0.1° or 89.1° - 89.9° there is a rapid beep
4. 0° and 90° there is a continuous sound
Press this button again to exit the sound mode.
Backlight Button
Push this button once to turn on the backlight function. The CD back-
light will stay on for approximately 30 seconds with no movement of the
level. Any push of a button or movement of the level will turn the back-
light back on. To exit the backlight function, push this button again.
Calibrate Button
Push this button to enter calibration mode. See Calibration section for
more information on how to calibrate this digital level.
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Inclination Indication
The left and right arrows are displayed to indicate the inclination
direction of the digital level.
When the digital level is at the position of 0 degree, the horizontal
reference line will show as follows:
Auto Shut-Off
The digital level will automatically shut-off in 5 minutes if no key is
pressed.
NOTE: This can be changed to a 2 hour automatic shut-off, please
see MODE function.
“Erro” eading
An error reading on the CD indicates the level is tipped too far
forward or backward to display an accurate reading.
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6. Calibration
To Calibrate this unit:
1. Select a flat horizontal reference surface, like a table or
countertop. It should be fairly level, but need not be perfectly
level. Position the level in the horizontal position with the CD
facing you, as pictured on the cover of this manual.
2. With the digital level turned on, push and hold the CA button
for 5 seconds.
3. The CD will show "CA 1" indicating the digital level has
entered the calibration process.
4. After 5 seconds, the display will indicate "CA 2", meaning the
first calibration point was accepted.
5. Rotate the level 180 degrees vertically so that the CD is still
facing you, but the level is now upside-down.
6. After approximately 5 seconds, the level will finish its self-
calibration and return to normal operating mode, indicating
the calibration was successfully completed. If the level is not
rotated correctly, it will continue to show “CA 2” until the
level is properly rotated.
IMPO TANT: It is the responsibility of the user to verify the
calibration of the instrument before each use.
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7. Technical Specifications
Display Range 4 x 90º
Resolution 0.1º, 0.1%, 1/8″, .125″, 1 mm/m
Accuracy ± 0.1º for 0º and 90º
± 0.2º for other angles
Power Supply 2 “AAA” alkaline batteries (not included)
Battery ife 100 hours
Working Temperature 32°F to 122°F
Dimensions 24″x 1″x 2.4″(1760-2400)
48″x 1″x 2.4″(1760-4800)
Weight 1.19 lbs (1760-2400)
2.30 lbs (1760-4800)
IP Rating IP54
8. Care and Handling
•This 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 unit dry and clean. 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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