The total station has many uses, such as angle measurement, distance (oblique distance, horizontal distance, height difference) measurement, three-dimensional coordinate measurement, traverse measurement, intersection point measurement and setting out measurement. After the built-in special software, the function can be further expanded.
Basic operation and use method of total station:
Horizontal angle measurement
(1) Press the angle measurement key to put the total station in the angle measurement mode and aim at the first target a.
(2) Set the reading of the horizontal dial in direction a as 0 ° 00 ′ 00 ″.
(3) Aim at the second target B, and the horizontal dial reading displayed at this time is the horizontal included angle between the two directions.
Distance measurement
(1) Set prism constant
Before ranging, the prism constant must be input into the instrument, and the instrument will automatically correct the measured distance.
(2) Set atmospheric correction value or air temperature and pressure value
The propagation speed of light in the atmosphere will change with the temperature and pressure of the atmosphere. 15 ℃ and 760mmhg are a standard value set by the instrument. At this time, the atmosphere is corrected to 0ppm. During actual measurement, the temperature and pressure values can be input, and the total station will automatically calculate the atmospheric correction value (or directly input the atmospheric correction value), and correct the ranging results.
(3) Measure the instrument height and prism height and input them into the total station.
(4) Distance measurement
Aim at the center of the target prism, press the ranging key, the distance measurement starts, and the oblique distance, horizontal distance and elevation difference are displayed when the ranging is completed.
There are three modes: coarse measurement mode and precision measurement mode. The precision measurement mode is the most commonly used ranging mode, with the measurement time of about 2.5s and the minimum display unit of 1mm; Tracking mode, which is commonly used for continuous ranging when tracking moving targets or setting out. The minimum display is generally 1cm, and each ranging time is about 0.3s; Rough measurement mode, the measurement time is about 0.7s, and the minimum display unit is 1cm or 1mm. During distance measurement or coordinate measurement, you can press the ranging mode key to select different ranging modes.
It should be noted that some models of total station cannot set the instrument height and prism height during distance measurement. The displayed height difference value is the height difference between the horizontal axis center of total station and prism center.