Level Box

Level Box Horizontal position setting: 1) Put level box on one plane. When the bubble stay at left side, being relative to the horizontal position, it means that the left side of level box is higher than right side 2) Adjust the high of right side of level box properly until the bubble stay in mid position, press ABS / zero button 5 seconds for zero setting, then the LCD display the horizontal position 3) When the level box on a plane, and the bubble stay at right side, it means the right side of level box is higher than left side at relative plane 4) Adjust the high of left side of level box properly until the bubble stay in mid position, press ABS / zero button 5 seconds for zero setting, then the LCD display the horizontal position 5) It means the measuring plane is 0.8 degree off the horizontal plane