The station is at a known point: then start to build the station, first input the coordinates of the station, then input the coordinates of the rear viewpoint according to the prompt, aim the instrument at the rear viewpoint, and then press the ranging button. After the measurement is completed, the site will be established.

At this time, it is necessary to measure the back viewpoint reversely to see how much the measured back viewpoint coordinates differ from the coordinates you entered. If it is within the allowable range, the next lofting can be carried out.

If not, we need to find out the reason, which comes from three aspects: instrument problem, human problem and point coordinate problem. After solving, you can enter the next step of lofting.

According to the instrument prompt input lofting point coordinates, general instrument will display the angle after input * * *? Distance * * * means that the instrument calculates the relationship between the point to be lofting and the site according to the input data. Regardless of him, then press the range key or the next key to enter an interface where the horizontal angle will change constantly. Adjust the instrument to the vicinity of 0 0 0 minutes and 0 seconds, and then adjust the instrument to 0 0 0 minutes and 0 seconds with horizontal inching, which means that the point to be lofting is on this line.

Extended data:

1, angle measurement

(1) function: horizontal and vertical angles can be measured.

(2) Method: Like theodolite, if the horizontal angle ∠ AOB is to be measured, then:

1) When the accuracy requirement is not high:

Aim at point A-zero (0 setting)-aim at point B, and write down the size of the horizontal dial HR.

2) When the accuracy is high, the observation set method can be used. The operation steps are the same as those of theodolite, only press "H SET" when configuring dial.

2. Distance measurement

Setting of PSM and PPM-before ranging, measuring coordinates and lofting.

1) prism constant (PSM) setting.

Universal: prism =0 (original prism), -30mm (domestic prism)

2) Setting of atmospheric correction number (PPM) (multiplication constant).

Enter temperature (temp) and pressure (press) during measurement, or enter PPM value after calculation.

(1) function: it can measure the horizontal distance HD, the height difference VD and the oblique distance SD (the height difference and oblique distance between the total station lens point and the prism lens point).

(2) Method: aim at the prism point and press "MEAS".

Baidu encyclopedia-total station