Topon Auto Level AT-B2 New Brand
AT-Bseries SPECIFICATIONS
| AT-Bseries SPECIFICATIONS |
AT-B2 |
AT-B3A |
AT-B4A |
| Telescope |
| Length |
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″ |
3.5″ |
4″ |
Field of View
(at 100m/328ft.) |
1°20′
(2.3m / 7.5ft.) |
1°25′
(2.5m / 8.2ft.) |
| Minimum Focus |
0.2m (7.9 in.) from end of telescope
0.3m (1ft.) from instrument center |
| Image |
Erect |
| Stadia Constant |
0 |
| Stadia Ratio |
100 |
| Accuracy (1km double run leveling) |
| 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 |
| Compensator |
| Type |
Pendulum compensator with magnetic damping system |
| Setting Accuracy |
0.3″ |
0.5″ |
| Working Range |
±15′ |
| Circular level |
| Sensitivity |
10′ / 2mm |
| Horizontal circle |
| Diameter |
103mm (4.1 in.) |
| Minimum Division |
1°/ 1gon |
| General |
| Water Resistance |
IPX6 (IEC 60529:2001) |
| Operating Temperature |
-20℃ to +50℃ (-4°F to +122°F) |
| Size |
Width |
130mm (5.12 in.) |
| Length |
215mm (8.46 in.) |
| Height |
140mm (5.51 in.) |
135mm (5.31 in.) |
| Weight |
1.85kg (4.1 lbs.) |
1.7kg (3.7 lbs.) |
