Topcon DL-501 - 25 Specifications

118
25.SPECIFICATIONS
Except where stated, the following specifications apply to both DL-501 Advanced and DL-501
Standard.
Telescope
Length: 280mm
Aperture: 45mm (1.8 inch)
Magnification: 32X
Image: Erect
Resolving power: 3"
Field of view: 1°20' (2.3m/100m)
Minimum focus: 1.5m (5.0 ft)
Stadia ratio: 1:100
Stadia additive constant: 0
View Finder (DL-501 Advanced only)
Length: 130mm
Aperture: 22mm (about 0.9 inch)
Magnification: 4.5X
Image: Erect
Field of view: 3°
Minimum focus: 7m
Auto Focus (DL-501 Advanced only)
Method: Combination of passive/electronic distance measurement and
contrast detection
Range: 1.6m to 100m
Minimum brightness level: 20lx at staff
Auto Focus time: 0.8 to 4 sec. (outdoors, fine to cloudy conditions)
Auto Focus motion: Yes/No (selectable)
Auto Focus/manual conversion: No (Manual mode given priority by friction clutch)
Automatic compensator
Automatic compensator: Magnetic damping and pendulum mechanism
Compensation range: ±12'
Setting accuracy: ±0.3"
Tilt warning
Mechanism: Liquid 2-axis tilt sensor
Range: ±8.5’ (graphic level display and audio tone)
Measurement
Horizontal circle: Diameter: 103mm
Graduation: 1°/1 gon
Measuring range
*1
:
Height 0.0375 to 1.9305m (0.124 to 6.333 ft) (with BIS20 staff)
0.0375 to 2.9725m (0.124 to 9.752 ft) (with BIS30/30A staff)
0 to 4m (13.123 ft) (with BGS40 staff)
0 to 5m (16.404 ft) (with BGS50 staff)
Distance Electronic measurement: 1.6 to 100m
Visual measurement: from 1.5m
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