Topcon GTS-3B - Specifications

Telescope
Length
Objective aperture
Magnification
Image
Field of view
Resolving power
Minimum focus distance
Distance measurement
Measurement range
152mm
40mm(EDM: 45mm)
30X
Erect
1
°20'
3/1
1.5m
Type Prism
Atmospheric conditions
Condition 1 Condition 2
1
Prism
2,000
m 2,300 m
(6,600 ft) (7,600 ft)
GT8-38 3 Prisms
2,700
m 3,100 m
(8,700 ft)
(10,200 ft)
9 Prisms
3,600
m
4,200 m
(11,800 ft)
(13,800 ft)
1 Prism
1,600
m 1,800 m
(5,200.ft)
(5,900
ft)
GT8-3C 3 Prisms
2,200
m 2,500 m
(7,200 ft)
(8,200 ft)
9 Prisms
2,800
m
3,400 m
(9,200 ft) (11 ,100 ft)
Condition 1: Slight haze with visibility about 20 km (12.5 miles), moderate sunlight with
light heat shimmer.
2: No haze with visibility over 40 km (25 miles), overcast with no heat
shimmer.
Measurement accuracy
GT8-38
± (5mm +
3 ppm) m.S.e.
GT8-3C
± (5mm +
3 ppm) m.s.e. -1 Orv + 40°C
± (5mm +
7 ppm) m.s.e. -20rv-1 O°C, +40rv+50°C
Accuracy around the far end of measuring distance is enhanced by adding the number of
prism; higher accuracy is available with 3 prisms than that with a single prism and with
9 prisms higher accuracy
is available thafl that with 3 prisms.
Display unit
Number of distance (Single)!
Continuous measurement
Tracking/Coarse
67
1 mm (0.005 ft.)
1
Omm (0.02ft.)
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