There are many details to be aware of during the use of the level. First of all, it must be noted that the table to be operated must be kept clean and flat. Secondly, it must be ensured that the bubble can be read when it is completely still. There will be deviations in the values read. For the test of the level, it will be affected by some other factors, such as temperature changes or wind sources, which will affect the measurement results. Therefore, it is necessary to pay attention to the isolation of the wind source to avoid affecting the test. As a result, of course, similar instruments produced by different manufacturers will have certain deviations in the measurement results. It is recommended to select instruments produced by professional manufacturers to avoid large deviations in measurement and affect subsequent work.
Relatively speaking, these instruments are precision instruments and must be used correctly. The methods and related knowledge about the level are introduced here. I hope that everyone can help, especially to keep the bubbles in the readings. At rest, avoid serious effects due to reading deviations.