Topcon AT-B4 User Manual

27
10. SPECIFICATIONS
AT-B2 AT-B3 AT-B4
Telescope
Length 215mm
(8.46 in.)
Image Erect
Objective aperture 42mm
(1.65 in.)
36mm
(1.42 in.)
32mm
(1.26 in.)
Magnification 32X 28X 24X
Field of view
(at 100m/328ft.)
1
°20'
(2.3m/7.5ft.)
1°25'
(2.5m/8.2ft.)
Resolving power 3.0" 3.5" 4.0"
Minimum focus 0.3m (1ft.)
Stadia ratio 1:100
Additive constant 0
Horizontal circle
Diameter 103mm (4.1in.)
Graduation 1° / 1gon
Automatic compensator
Range ±15'
Circular level
Sensitivity 10' / 2mm
Standard deviation for 1 km of double run leveling
0.7mm
(0.03in.)
1.5mm
(0.06in.)
2.0mm
(0.08in.)
With micrometer 0.5mm
(0.02in.)
Water resistance IPx6 (IEC60529:2001)
Operating temperature
range
-20 to 50°C (-4 to 122°F)
Storage temperature
range
-40 to 70°C (-40 to 158°F)

Topcon AT-B4 Specifications

General

Brand	Topcon
Model	AT-B4
Category	Tools
Language	English