48295 Manual_Revised_07-0620 Page 90.0%. If the sound is turned on, the level will beep at 0.0% and 100%.Push the convert button to change the display to Slope mode (%).ABSOLUTE AND RELATIVE ANGLE MEASUREMENTSAbsolute angle measurement1. Place the digital level on a working surface with the base flat against the surface.2. The display indicates the absolute angle between “true level” and the workingsurface. The zero line indicates the level position, and the arrow indicates theorientation of the working surface: either above or below true level.3. To activate the sound, briefly press the button. The level will beepwhen the level is at 0° (level), 45°, 90° (plumb), and last hold angle.4. Press the Hold button to freeze the display reading. To take a newmeasurement, press the hold button again to return to measurement mode.Relative angle measurementThe relative angle mode allows you to measure the angle of difference between2 different surfaces.1. Place the digital level on Surface 1.2. The LCD screen indicates the absolute angle between true level and Surface 1.3. Press the ZERO button to activate the relative-angle measurement mode.The current angle will be considered to be 0.0° and the display will read 0.0°.4 Place the digital level on Surface 2, and the relative angle between Surface1 and Surface 2 will be displayed. The zero line indicates the Surface 1position, and the arrow indicates the orientation of Surface 2, either above orbelow Surface 1.5. At this point you can change the display units for the measured angle fromdegrees (°), to pitch (inch/foot), or slope (%) by pressing the convert button.