TOPCON AT-G4 AUTOMATIC LEVEL FOR SURVEYING WITH ONE MONTH WARRANTY

Description

SPECIFICATIONS
MODEL
ITEM
AT-G1
AT-G2/G2A
AT-G3
AT-G4
AT-G6
AT-G7
Telescope
Model
AT-G1
AT-G2
AT-G3
AT-G4
AT-G6
AT-G7
Length (mm/in.)
229/9
229/9
230/9
192/7.7
193/7.7
204/8
Image
Erect
Erect
Erect
Erect
Erect
Erect
Magnification
32
´
32
´
30
´
26
´
24
´
22
´
Objective lens (mm/in.)
45/1.8
45/1.8
40/1.6
30/1.2
30/1.2
30/1.2
Relative brightness
1.98
1.98
1.78
1.33
1.56
1.86
Field of view
1°20
¢
1°20
¢
1°30
¢
1°30
¢
1°30
¢
1°30
¢
Resolving power
2.5
²
2.5
²
3.0
²
3.5
²
4.0
²
4.0
²
Minimum focus (m/ft.)
1.0/3.2
1.0/3.2
0.5/1.6
0.5/1.6
0.5/1.6
0.9/2.9
Stadia constant (m)
0
0
0
0
0
0.1
Stadia ratio
100
100
100
100
100
100
Circular Level
Sensitivity (/2mm)
8
¢
8
¢
8
¢
8
¢
8
¢
10
¢
Automatic Leveling
Setting accuracy
±0.3
²
±0.3
²
±0.3
²
±0.3
²
±0.3
²
±0.5
²
Compensating range
±15
¢
±15
¢
±15
¢
±15
¢
±15
¢
±10
¢
Accuracy at 30m/100ft
w/o optical micrometer (mm/in.)
—
—
—
±2.0/±0.08
±2.0/±0.08
±2.5/±0.1
Accuracy 1km Double Run Level
w/o optical micrometer (mm/in.)
±0.7/±0.03
±0.7/±0.03
±1.5/±0.06
±2.0/±0.08
±2.0/±0.08
±2.5/±0.1
with optical micrometer (mm/in.)
±0.4/±0.02
±0.4/±0.02
±1.0/±0.04
—
—
—
Horizontal Circle
Dimameter (mm/in.)
90/3.5
117/4.7
117/4.7
117/4.7
117/4.7
102/4.0
Minimum division
10
¢
(0.1g)
1°(1g)
1°(1g)
1°(1g)
1°(1g)
1°(1g)
Weight
Instrument (kgs./lbs.)
2.1/4.6
1.8/4.1
1.8/4.1
1.6/3.5
1.6/3.5
1.2/2.6
Plastic carrying case (kgs./lbs.)
1.3/2.9
1.3/2.9
1.3/2.9
1.3/2.9
1.3/2.9
1.2/2.6
· Designs and specifications herein are subject to change without notice.
In order to obtain the best results with this instrument,
please be sure to review all user instructions prior to operation.
Important