Johnson 1760-2400 Manuale utente

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.

1870i-English_Manuals 3/22/17 1:58 PM Page 1

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

1870i-English_Manuals 3/22/17 1:58 PM Page 2

3. Location of Part/Components

CD Display

Window

Keypad

Hand Hole

End-cap

Plumb Vial

evel Vial

End-cap

1870i-English_Manuals 3/22/17 1:58 PM Page 3

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

1870i-English_Manuals 3/22/17 1:58 PM Page 4

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

1870i-English_Manuals 3/22/17 1:58 PM Page 5

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.

1870i-English_Manuals 3/22/17 1:58 PM Page 6

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.

1870i-English_Manuals 3/22/17 1:58 PM Page 7

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.

1870i-English_Manuals 3/22/17 1:58 PM Page 8

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.

1870i-English_Manuals 3/22/17 1:58 PM Page 9

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.

1870i-English_Manuals 3/22/17 1:58 PM Page 10

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