7640H-English_Manuals 12/11/13 4:18 PM Page 1 24" and 48" Waterproof Electronic Digital Level Model Nos. 1880-2400 & 1880-4800 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. ©2013 Johnson Level & Tool - Rev.
7640H-English_Manuals 12/11/13 4:18 PM Page 2 Table of Contents 1. Kit Contents 2. Features and Functions 3. Location of Parts/Components 4. Operating Instructions 5. 6. 7. 8. 9. Using the Product Self-Calibration Technical Specifications Care and Handling Product Warranty 1. Kit Contents Description Model Nos. 1880-2400 & 1880-4800 Electronic Digital Level Instruction Manual Carrying Case Qty. 1 1 1 2. Features and Functions • IP 65 dust and waterproof • Extremely accurate with 0.
7640H-English_Manuals 12/11/13 4:18 PM Page 3 • Two vials read plumb and level • Bright LCD backlight • Audible and visual plumb and level indicators • Shock absorbing end-caps • Large hand grips fastened with screws • Rigid aluminum box frame profile 3. Location of Part/Components LCD Display Window End-cap End-cap Hand Hole Plumb Vial Keypad Level Vial ©2013 Johnson Level & Tool - Rev.
7640H-English_Manuals 12/11/13 4:18 PM Page 4 4. Operating Instructions IMPORTANT: It is the responsibility of the user to verify the calibration of the instrument before each use. 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.
7640H-English_Manuals 12/11/13 4:18 PM Page 5 5. Using the Product millimeters/ meter Symbol Key Guide Reference Symbol inch/feet Symbol Sound Symbol Hold Symbol Percent Symbol Battery Symbol Degree Symbol RES Button Hold Button Mode Button Direction Arrow Symbol On/Off Button Sound Button Calibrate Button LCD Backlight Reference Button Button ON/OFF Button Push this button once to turn on the digital level. Push this button again to turn the digital level off.
7640H-English_Manuals 12/11/13 4:18 PM Page 6 slope, inches/feet in fractions, inches/feet in decimal and millimeters/ meters. A symbol at the top of the LCD will show which unit of measure you are currently in. Push and hold this button in for 3 seconds and then release to enter the automatic shut off mode (5 minutes or 2 hours).
640H-English_Manuals 12/11/13 4:18 PM Page 7 Hold Button Push this button once to enter hold mode. Pressing this button once will lock the current angle reading displayed on the LCD. The word HOLD will appear at the top of the display to remind you that you are in the HOLD 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 LCD and there will be 4 different types of sound. 1.
7640H-English_Manuals 12/11/13 4:18 PM Page 8 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” Reading An error reading on the LCD indicates the level is tipped too far forward or backward to display an accurate reading. Inclination Indication The left and right arrows are displayed to indicate the inclination direction of the digital level.
7640H-English_Manuals 12/11/13 4:18 PM Page 9 6. Self-Calibration IMPORTANT: It is the responsibility of the user to verify the calibration of the instrument before each use. To Calibrate this unit: Quick Level Calibration 1. Turn the digital level on. 2. Hold the digital level against a wall making sure the level bubble is centered in the vial. 3. While keeping the digital level in the level position push and hold the CAL button in for 3 seconds. 4.
7640H-English_Manuals 12/11/13 4:18 PM Page 10 4. “CAL” will flash on the LCD indicating the digital level is in the calibration process. 5. If the digital level is not kept stable or if the digital level is tipped to far forward or backward, “ERRO” will appear on the LCD. Push the Calibration Button one time to exit calibration mode and repeat the procedure. 6. If the calibration procedure is successful, the LCD will display “rdy”.
7640H-English_Manuals 12/11/13 4:18 PM Page 11 7. Technical Specifications Display Range Resolution Accuracy Power Supply Battery Life Working Temperature Dimensions Weight IP Class 4 x 90º 0.05º or 0.1º, 0.09% or 0.2%, 1/8", 0.125", 0.9mm/m or 2mm/m ± 0.05º for 0º and 90º ± 0.1º for other angles 2 “AAA” alkaline batteries (not included) Approx. battery life 100 hours continuous use 32°F to 122°F (-10°C to +50°C) 24" x 1" x 2.4" (610x25x61mm) (1880-2400) 48" x 1" x 2.4" (1220x25x61mm) (1880-4800) 1.
7640H-English_Manuals 12/11/13 4:18 PM Page 12 9. Product Warranty Johnson Level & Tool offers a limited lifetime 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 us online at www.johnsonlevel.com. The limited warranty for each product contains various limitations and exclusions.
