User Manual Q&AAnswer
Mar 02, 2025 - 11:02 AM
To calibrate the Johnson 1920-0800D Crescent Protractors and Squares, follow these steps:
1. Power on the unit by pressing the ON/OFF button.
2. Position the blade as shown in the manual.
3. Press the ZERO button to calibrate the display to a 0° reference angle. The display is now calibrated to a reference angle of 0°.
Note: It is important to verify proper calibration before each use to ensure accurate measurements. If you experience any problems with the product, please contact Johnson Level & Tool for assista
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