23-1
23 SPECIFICATIONS
23 SPECIFICATIONS
Telescope
Length : 150mm
Objective lens : 45mm (EDM 50mm)
Magnification : 30×
Image : Erect
Field of view : 1°30'
Resolving power : 2.5"
Minimum focus : 1.3m
Reticle illumination : Provided
Distance measurement
Measurement range
Condition 1: Sight haze with visibility about 20km (12.5miles) moderate sunlight with light heat
shimmer.
Condition 2: No haze with visibility about 40km(25 miles), overcast with no heat shimmer.
Measurement accuracy
GTS-233/235/236 : ±(2mm +2ppm × D) m.s.e.
GTS-239 : ±(3mm +3ppm × D) m.s.e.
D:Measuring distance (mm)
Least Count in Measurement
Fine measurement mode : 1mm (0.005ft.) / 0.2mm (0.001ft.)
Coarse measurement mode : 10mm (0.02ft.) / 1mm (0.005ft.)
Tracking measurement mode : 10mm (0.02ft.)
Measurement Display : 12 digits : max. display 99999999.9999
Measurement Time
Fine measurement mode : 1mm : 1.2sec. (Initial 4 sec.)
0.2mm : 2.8sec. (Initial 5 sec.)
Coarse measurement mode : 0.7sec. (Initial 3 sec.)
Tracking measurement mode : 0.4sec. (Initial 3 sec.)
(The initial time will be different by a condition and
setting EDM off time. )
Atmospheric Correction Range : –999.9 ppm to +999.9 ppm , in 0.1 ppm increments
Prism Constant Correction Range : –99.9 mm to +99.9 mm , in 0.1 mm increments
Coefficient Factor : Meter / Feet
International feet 1meter = 3.2808398501 ft.
US SURVEY feet 1meter = 3.2808333333 ft.
Model Prism
Atmospheric conditions
Condition 1 Condition 2
GTS-233
GTS-235
GTS-236
Mini prism 1,000m (3,300ft) ----
1 prism 3,000m (9,900ft) 3,500m (11,500ft)
3 prisms 4,000m (13,200ft) 4,700m (15,400ft)
9 prisms 5,000m (16,400ft) 5,800m (19,000ft)
GTS-239
Mini prism 900m (3,000ft) ----
1 prism 2,000m (6,600ft) 2,300m (7,500ft)
3 prisms 2,700m (8,900ft) 3,100m (10,200ft)
9 prisms 3,400m (11,200ft) 4,000m (13,200ft)
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