Plumb line meter leveling third side adjustment is not flat what effect

Plumb line instrument leveling the third side of the adjustment is not flat impact is that the precision has deviated, the data is not accurate. According to the relevant information query high-rise building plumbing instrument also called plumbing instrument or laser latitude and longitude instrument, the operating steps: fixed tripod, install the instrument, adjust the level, aligned with the ground axis control points, rotate 180 ° to adjust the error, and then up to the upper or upper vertical control holes, above the personnel in the floor to draw a fixed point of the cross-lines, the use of intercom notification of the laser column red dot stabilization that is to complete the operation of the whole process.