Place the electronic level to be tested on a flat surface (or machine tool guideway) that has been roughly adjusted to a level position, close to the locating block. Once the bubble stabilizes, the reading at the end of the bubble is a1. Then, adjust the level horizontally by 180° and place it precisely back in the original position. Record the reading at the other end of the bubble as a2. The half of the difference between the two readings is the zero point deviation = (a1 - a2) / 2 divisions. If the zero point deviation exceeds the permissible range, a high-speed zeroing mechanism is required. Alternatively, find the relative zero point instead of adjusting the zero. As shown in the figure, place the electronic level on the plane. Once the bubble stabilizes, read the right end as a1. Adjust the level horizontally by 180° and place it accurately. After the bubble stabilizes, the reading at the right end is a2. The half of the difference between the two readings is the relative zero point; the electronic level can only measure with the relative zero point as a standard. As shown in the figure, the baseline extends 1.5 divisions to the right.

Do not arbitrarily turn screws or nuts that are not designated for adjustment.

Sixth, precautions: 1. Changes in temperature can cause measurement deviations. It is necessary to keep the equipment isolated from heat sources and wind sources during detection or use. If the environmental humidity differs from the storage humidity, the equipment should be stabilized for 3 hours before use in the operating environment.

2. Prior to measurement, it is necessary to wait for the bubble to completely settle.

After using the level, the working surface must be wiped clean, coated with rust preventive, and stored in a clean, dry place.

4. Our company is responsible for defects and malfunctions caused by manufacturing issues with the three-year warranty electronic level, provided that it is used and stored in accordance with specifications.