Horizontal angles can be directly read in 1
o or 1gon units. Free rotation feature allows you to read any angle from zero. The circle is covered for protection against dirt and scratch. The readout window is located below the eyepiece for quick reading.
AT-B Series Features:
Durable, Dependable, High Value Auto Levels
3 Models - 32x, 28x, and 24x Magnifications
Rapid, Accurate, and Stable Automatic Compensation
Ultra-Short 20cm (7.9 in.) Focusing
All-Weather Dependability
Clampless, Endless Fine Horizontal Adjustments
Rapid, Stable, and Durable Compensator
The compensator of AT-B Series incorporates four suspension wires made of super-high-tensile metal that features minimal thermal expansion coefficient, providing unmatched durability and accuracy. Finely tuned magnetic damping system quickly levels and stabilizes the line of sight despite the fine vibrations present when working near heavy equipment or busy roadways.
Horizontal Circle for Angle Measurement
Horizontal angles can be directly read in 1
o
or 1gon units. Free rotation feature allows you to read any angle from zero. The circle is covered for protection against dirt and scratch. The readout window is located below the eyepiece for quick reading.
20cm (7.9 in.) - Ultra-Short Minimum Focus
The AT-B Series can focus on objects at 20cm (7.9 in.) in front of the telescope. This feature dramatically facilitates the works in confined spaces.
|
|
AT-B2
|
AT-B3
|
AT-B4
|
|
Telescope
|
|
Length
|
215mm (8.46 in.)
|
215mm (8.46 in.)
|
215mm (8.46 in.)
|
|
Magnification
|
32X
|
28X
|
24X
|
|
Objective Aperture
|
42mm (1.65 in.)
|
36mm (1.42 in.)
|
32mm (1.26 in.)
|
|
Resolving Power
|
3 in.
|
3.5 in.
|
4 in.
|
|
Field of View
|
1
o
20'
|
1
o
25'
|
1
o
25' (at 100m/328ft.)
|
|
(at 100m/328ft.)
|
(2.3m/7.5 ft.)
|
(2.5m/8.2 ft.)
|
(2.5m/8.2 ft.)
|
|
Min. Focus from end of telescope
|
0.2m (7.9 in.)
|
0.2m (7.9 in.)
|
0.2m (7.9 in.)
|
|
Min. Focus from instrument center
|
0.3m (1 ft.)
|
0.3m (1 ft.)
|
0.3m (1 ft.)
|
|
Image
|
Erect
|
Erect
|
Erect
|
|
Stadia Constant
|
0
|
0
|
0
|
|
Stadia Ratio
|
100
|
100
|
100
|
|
Focusing Knob
|
2-speed
|
1-speed
|
1-speed
|
|
Sighting Aid
|
Peep Sight
|
Gun Sight
|
Gun Sight
|
|
Accuracy
|
|
Without Micrometer
|
0.7mm (0.03 in.)
|
1.5mm (0.06 in.)
|
2.0mm (0.08 in.)
|
|
With Micrometer
|
0.5mm (0.02 in.)
|
n/a
|
n/a
|
|
Compensator
|
|
Type
|
Pendulum compensator with magnetic damping system
|
|
Setting Accuracy
|
0.3 in.
|
0.5 in.
|
0.5 in.
|
|
Working
Range
|
+/-15 ft.
|
+/-15ft.
|
+/-15 ft.
|
|
Circular level
|
|
Sensitivity
|
10 ft./2mm
|
10 ft./2mm
|
10 ft./2mm
|
|
Horizontal circle
|
|
Diameter
|
103mm (4.1 in.)
|
103mm (4.1 in.)
|
103mm (4.1 in.)
|
|
Minimum Division
|
1
o
/1gon
|
1
o
/1gon
|
1
o
/1gon
|
|
General
|
|
Water Resistance
|
IPX6 (IEC 60529:2001)
|
|
Operating Temperature
|
-4F to +122F (-20C to +50C)
|
|
Width
|
5.12 in. (130mm)
|
5.12 in. (130mm)
|
5.12 in. (130mm)
|
|
Length
|
8.46 in. (215mm)
|
8.46 in. (215mm)
|
8.46 in. (215mm)
|
|
Height
|
5.51 in. (140mm)
|
5.51 in. (140mm)
|
5.31 in. (135mm)
|
|
Weight
|
4.1 lbs. (1.85kg)
|
3.7 lbs. (1.7kg)
|
3.7 lbs. (1.7kg)
|
link:
http://www.topconpositioning.com/sites/default/files/literature/ATB_series_Broch_7010_2057_RevA-FINAL_sm.pdf
