How to use laser level！ |
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Laser level, also known as throwing line instrument, belonging to the basic line marking equipment. In general, according to the instructions on the use of it, the following by Feisikai Xiaobian to introduce you to the use of laser level method.
Horizontal scale values are expressed in degrees (seconds) or as slopes, and are expressed as the angle at which the bubble is shifted by one grid or by the height at which the bubble is tilted by one meter of the working surface. As the use of the level of inclination is very small, so tg, such as tg4 4 radian = 0.02mm / 1000mm, the level of the work surface when measuring close to the surface to be measured until the bubble after reading stable. To measure the actual tilt value of length L, it can be calculated by the following formula: Actual tilt value of level meter = Nominal index L Lattice number, for example: nominal index value is 0.02mm / m, L = 200mm, The number of grids is 2 grids, then the actual tilt value = 0.02 / 1000 200 2 = 0.008mm.
In order to avoid the measurement error caused by inaccurate zero level of the level meter, the zero level of the level meter must be checked or adjusted before use. Zero level check and adjust the level of the instrument: Place the instrument to be calibrated on a substantially horizontal flat plate, close to the positioning block, a1 after the bubble is stabilized, and then adjust the level to 180 azimuths, Write down the reading at the other end of the bubble as a2 by the first reading. Half of the difference between the two readings is zero error, that is = (a1-a2) / 2 grid. If the zero error is out of the allowable range, adjust the zero mechanism.
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