Brand Model: Beijing Bowflex - BTS-802, BTS-805 (C / E / English display, A technical indicators ranging differences, H with slide base, L with lower laser plummet) Applications: Professional Full station instrument for ground construction of large buildings and underground tunnels and other precision engineering measurements or deformation monitoring and other fields, in order to achieve horizontal angle, vertical angle, slope distance, horizontal distance, height and other measurements. Instrument features: high density and large display screen, large fonts Chinese interface design; elegant appearance instrument panel design, smooth lines, and enhance the overall sense of the instrument and visual effects; numbers, letters, function keys, navigation keys are operating more simple ; similar memory WINDOWS Explorer file management system, intuitive to use; process large capacity storage space, in addition to pre-rich applications (hanging high on the side of resection, area, line stakeout, etc.), but also according to different user needs software applications; bidirectional communication function, the user can directly control the PC Programming Total Station realization of complex functions; Ranging faster, farther, more stable; 50,000 point data can be stored in bulk memory, the memory can be easily managed, can automatically record a variety of measurement data; integration of large capacity universal battery. Objective lens aperture: 45mm Magnification: 30 × Erect Field: 1 ° 30 'Minimum focus: 1.5m distance measurement single prism: 2.0Km prism: 3.0Km measurement accuracy: ± (2mm +2 ppm? D) Minimum reading Fine measurement mode: 1mm (0.001ft) tracking measurement mode: 1mm (0.001ft) measurement speed precision measurement mode: 1.8 seconds (2.5 seconds for the first time) fast measurement mode: 0.9 seconds (2.5 seconds for the first time) Tracking mode: 0.4 seconds (1.5 for the first time sec) atmospheric correction range:-499ppm ~ +499 ppm prism constant correction range:-99mm ~ +99 mm measured corner reading mode: Incremental method of reading detection system: the diameter Minimum reading: 10 "/ 5" / 1 "standard deviation: 2 "Measuring time: 0.1 seconds Compensator Working range: ± 3 'Level of sensitivity: Circular level: 8' / 2mm Plate level: 30" / 2mm Optical plummet Magnification: 3X Focus range: 0.5 ~ ∞ FOV: 4 ° Battery? Voltage: DC 7.2V? Capacity: 2.2AH Continuous working time (± 20 ℃)? distance and angle measurements: 4 hours? for angle measurement only: 18 hours Temperature range? Storage: 40 ℃ ~ +60 ℃? Working: -20 ℃ ~ +55 ℃