South surveying and mapping electronic theodolite DT02L centering method and instruction manual.
2. Turn the anchor screw to align the optical calibrator with the center of the stop sign. At this point, the bubble of the circular level shifts, and the tripod legs expand and contract to center the bubble of the circular level. Pay attention to the position of the tripod tip.
Second, accurate centering and leveling:
1, leveling: firstly, turn the sighting part to make the leveling tube parallel to the attachment of any pair of foot screws, and turn both foot screws inward or outward with both hands at the same time to center the air bubble, and pay attention to that the moving direction of the air bubble is always the same as that of the left thumb; Then rotate the aiming part by 90, and rotate the third foot screw to center the bubble in the leveling tube. ?
2. First unscrew the centering connecting screw, and gently move the theodolite on the frame head to make the tip of the hammer ball accurately align with the marking center of the centering table, or make the marking center of the reticle of the centering device coincide with the marking image of the measuring table; Then tighten the connecting screws. 3. Generally, it takes several cycles of "alignment-alignment-alignment" until alignment meets the requirements.
Extended data:
Characteristics of electronic theodolite:
There are many kinds of electronic theodolite, and they all have the same characteristics as follows:
1. The horizontal axis and the vertical axis of the instrument are made of the same alloy steel, and a spiral ball is arranged between the shaft and the shaft sleeve, and a light pressure interference fit is adopted. Its clearance is zero, and its error is only the machining shape error, so this kind of shafting has the characteristics of high precision, little temperature influence, flexible rotation at low temperature, good seismic performance, difficult jamming and long service life, thus ensuring the reliability and stability of the instrument.
2. The number of gratings is small (the number of gratings in the horizontal disk is only 6480), which reduces the technical requirements of the structure, thus increasing the stability of the instrument and improving its anti-vibration ability.
3. It has automatic correction function, which can correct the index difference, collimation axis error value and horizontal axis error of the instrument, thus improving the accuracy of the instrument.
4. The circuit board is small, and the digital circuit with automatic signal balance is adopted to realize the automation of electric adjustment and enhance the reliability of the instrument.
5. Low power consumption and low working current.
6. Laser alignment is eye-catching, clear and easy to use.
7, there is a total station operation function.
8. There are three representations of angles: hexadecimal, decimal and decimal. In particular, the secret position system can be used by troops.
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