
TOPCON AT-B4A 自动水平仪
制造商: TOPCON Model: AT-B4A - 联系
Telescope
Length: 214mm (8.42in.)
Magnification: 24X
Objective Aperture: 32mm (1.26 in.)
Resolving Power: 4”
Field of View (at 100m/328ft.): 1°25’ (2.5m / 8.2ft.)
Minimum Focus: 0.2m (7.9 in.) from end of telescope0.3m (1ft.) from instrument center
Image: Erect
Stadia Constant: 0
Stadia Ratio : 100
Focusing Knob: 1-speed
Sighting Aid: Gun Sight
Accuracy (1km double run leveling)
Without Micrometer: 2.0mm (0.08 in.)
With Micrometer: n/a
Compensator
Type: Pendulum compensator with magnetic damping system
Setting Accuracy: 0.5"
Working Range: ±15'
Circular Level
Sensitivity: 10' / 2mm
Horizontal Circle
Diameter: 99mm (3.9in.)
Minimum Division: 1°/ 1gon
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