The use of laser vertical collimator 1. placement, alignment, leveling the tripod placed on the station, the instrument installed in the base of the tripod center hole to force the locking base clamp knob, the instrument stable. Adjust the height of the tripod, the telescope eyepiece roughly human eye contour. Open-to-point laser switch, adjust the focusing knob on the spot, the laser is focused on the test site. Adjusting the tripod, so the bubble is centered round blisters. Turn the instrument alidade so long vial with screw connection of any two legs parallel to the same amount of rotating in opposite directions the two leveling screws so that the bubble is centered. The instrument alidade turned 90? Surveying instruments manufacturers, swirling spiral third leg, the bubble is centered. Using the above method repeatedly adjusted until the instrument is rotated to any position, the bubble does not exceed one quarter of the maximum deviation from the grid value. The instrument alidade rotated 180? Check on the situation, if it deviates, loosen the central screw, the head of the entire instrument rack pan, until the laser spot and the station precise alignment. Rotate the alidade, confirm that the instrument is rotated to any position, long spirit level bubble is centered, if deviated, repeat the above steps. Confirmation, and after leveling is completed, will point the laser turned off to save electricity. 2. Place the grid laser sighting target at the target. Rotate the telescope eyepiece reticle crosshairs make clear, then turn the focusing knob on the laser target reticle clear imaging, and try to eliminate parallax, that is, when the observer moves slightly sight, there can be between the reticle and the target significantly offset. Otherwise, you should continue to ignore the above steps until the difference. 3. A. upward vertical quasi-optical vertical quasi If the instrument is calibrated when the instrument after leveling, collimation axis coaxial with the vertical axis error ≤5 °, vertical alignment of production as surveying instruments, one observation can guarantee vertical quasi accuracy. However, in order to improve the vertical quasi precision instrument alidade should be rotated 180 ?, get a second observation through a telescope surveying instruments manufacturer, whichever number (midpoint) of the measured value. B. laser surveying instruments vertical quasi-China high-end, Sanding manufacturing STS-750 Series Total Station, the world's leading technology, craftsmanship and manufacturing. Adapt to a variety of measurement environment: heat, cold, rain; competent major measurement tasks: mapping, engineering, architecture. Excellent protection and environmental adaptability, the instrument in a variety of complex and harsh operating conditions of work performance and stability as usual, ready to guarantee the reliability of measuring outcomes, to ensure the efficient use of maximum. 750 total station measurements rich program that always let you handy. Surveying instruments surveying instruments manufacturers _ _ Jinke instrumentation provided by the Instrument Co., Ltd. Qingdao Branch. Instrument Co., Ltd. Qingdao Branch (www.qdjk17.com) strong, credible, in Qingdao, Shandong analytical instruments industry has accumulated a large number of loyal customers. The company better work attitude and constantly improving innovative ideas will lead Jinke instrumentation and you work into the brilliant, for a better future!