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Instructions for installing batteries in the digital level, including screw removal and polarity.
How to turn the digital level on and off using the dedicated button.
Functionality of the mode button for switching measurement units.
Instructions for installing batteries in the digital level, including screw removal and polarity.
How to turn the digital level on and off using the dedicated button.
Functionality of the mode button for switching measurement units.
The Johnson 24" and 48" Electronic Digital Level, Model Nos. 1760-2400 & 1760-4800, is a precision instrument designed for accurate angle and slope measurements in various construction and leveling applications. This digital level offers a comprehensive set of features to enhance usability and precision, making it a valuable tool for professionals.
At its core, the device functions as an electronic level capable of displaying angle inclination in five different construction languages or units of measure. Users can choose to view measurements in degrees, percentage of slope, inches per foot (fractional), inches per foot (decimal), or millimeters per meter. This versatility ensures that the level can be adapted to a wide range of project requirements and regional standards. The current unit of measure is clearly indicated by a symbol at the top of the LCD display, providing immediate feedback to the user.
One of the key operational features is the self-calibration capability. This allows the user to ensure the instrument's accuracy before each use, which is crucial for reliable measurements. The calibration process is straightforward: the user positions the level on a flat horizontal surface with the LCD facing them, then presses and holds the CAL button for 5 seconds. The display will show "CAL1," indicating the start of calibration. After 5 seconds, "CAL2" will appear, signifying that the first calibration point has been accepted. The user then rotates the level 180 degrees vertically so it is upside-down, with the LCD still facing them. Approximately 5 seconds later, the level completes its self-calibration and returns to normal operating mode, confirming successful calibration. If the level is not rotated correctly, it will continue to show "CAL2" until the proper rotation is performed. This self-calibration function underscores the importance of user responsibility in verifying the instrument's accuracy.
The digital level is equipped with an automatic digit inversion feature, which is particularly useful for overhead measurements. When the level is inverted, the display automatically flips, ensuring that the readings are always upright and easy to read, regardless of the level's orientation. This eliminates the need for the user to mentally invert numbers, reducing potential errors and improving efficiency.
A "Reference" function is integrated into the device, allowing users to set any angle or slope as "0.0." This is an incredibly useful feature for projects requiring continuous measurement of the same slope or for determining the difference between two slopes. To activate this, the user positions the level at the desired angle, presses and releases the reference button, and "REF" will appear on the screen, with the numbers resetting to 0.0. The level can then be moved to a second surface to measure the difference. Pressing the reference button again exits this mode.
The "Hold" function is another practical feature, enabling users to lock the current angle reading on the LCD. When activated, the word "HOLD" appears at the top of the display, indicating that the measurement is frozen. This is beneficial when taking readings in difficult-to-view positions, allowing the user to move the level to a more comfortable viewing angle without losing the measurement. Pressing the hold button again releases the measurement.
For enhanced visibility in various lighting conditions, the level includes a bright LCD backlight. This backlight can be turned on with a single button press and will remain active for approximately 30 seconds without movement of the level. Any button press or movement of the level will reactivate the backlight, ensuring continuous visibility.
Audible and visual plumb and level indicators provide additional feedback to the user. The "Sound" function offers four different types of beeps to indicate proximity to plumb or level. A slow beep signals angles between 10°-5° or 80°-85°, a faster beep for 4.9°-1° or 85.1°-89°, a rapid beep for 0.9°-0.1° or 89.1°-89.9°, and a continuous sound for exact 0° and 90° angles. This auditory feedback allows users to work without constantly looking at the display, which can be particularly helpful in dimly lit environments or when the display is out of direct line of sight.
The physical design of the level also prioritizes durability and user comfort. It features shock-absorbing end-caps to protect against impacts and large hand grips fastened with screws for secure handling. The rigid aluminum box frame profile contributes to the level's overall robustness and stability. Two traditional vials, one for plumb and one for level, are also incorporated, offering a conventional method of leveling. These "SurroundView®" vials are designed to reflect ambient light, making them easy to read.
The device also includes an auto shut-off feature to conserve battery life. By default, the digital level will automatically turn off after 5 minutes of inactivity. This can be adjusted to a 2-hour shut-off by holding the MODE button for 3 seconds. When the battery is low (less than 5%), the level will default to the 5-minute auto shut-off, and the battery symbol will flash as a reminder. An "Erro" reading on the LCD indicates that the level is tipped too far forward or backward for an accurate reading. Inclination direction is shown by left and right arrows on the display.
Maintenance of the Johnson Digital Level is straightforward. It is a precision tool and should be handled with care, avoiding shock vibrations and extreme temperatures. Before moving or transporting the unit, it should be turned off. For extended storage (more than three months), the batteries should be removed to prevent damage from deterioration. The level should always be stored in its case when not in use and kept dry and clean. Any moisture or dirt should be removed with a soft, dry cloth. Harsh chemicals, strong detergents, or cleaning solvents should not be used to clean the unit, as these can damage the instrument.
In summary, the Johnson Electronic Digital Level is a robust, versatile, and user-friendly tool designed to provide accurate and reliable angle and slope measurements with features like self-calibration, automatic digit inversion, reference and hold functions, a bright backlight, and audible indicators, all housed in a durable and ergonomic design.
General| Brand | Johnson |
|---|---|
| Model | 1760-4800 |
| Category | Laser Level |
| Language | English |
