GTS-310
                                 SPECIFICATIONS
TELESCOPE                      
  Length

150 mm
  Objective 

  lens diameter

 45 mm (EDM:50mm)
  Magnification 30 x
  Image Erect
  Field of view 

  (at 1,000m)

 1°30´
  Resolving power 2.5"
  Minimum focusing   

  distance

 1.3 m
  Reticle illumination provided
DISTANCE MEASUREMENT 
  Measuring range GTS-300/311 GTS-312 GTS-313

  Condition 1

    1 Prism

    3 Prisms

    9 Prisms

2,400m (7,900ft)

2,200m(7,200ft)

1,600m(5,200ft)

3,100m(10,200ft)

2,900m(9,500ft)

2,400m(7,500ft)

3,700m(12,100ft)

3,600m(11,800ft)

3,000m(9,800ft)

  Condition 2

    1 Prism

    3 Prisms

    9 Prisms

 

2,700m(8,900ft)

2,500m(8,200ft)

1,900m(6,200ft)

 

3,600m(11,800ft)

3,300m(10,800ft)

2,600m(8,500ft)

 

4,400m(14,400ft)

4,200m(13,800ft)

3,600m(11,800ft)
  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

±(2mm+2ppm)m.s.e.
  Least count in measurements

    Fine mode

    Normal mode

    Coarse mode

    Tracking mode

 0.2 mm (0.001 ft)

1 mm (0.005 ft)

10 mm (0.02 ft) /1 mm (0.005 ft)

10 mm (0.02 ft)
  Measurement display

11 digits: max. display 9,999,999.9999m
  Measuring time

    Fine mode

    Normal mode

    Coarse/Tracking mode

3.0 sec.

2.0 sec.

0.7 sec./0.3 sec.
  Atmospheric correction range Temperature / pressure input on

-99.9 to +99.9ppm (by 0.1ppm )
  Prism constant correction -99.9 to +99.9mm (by 0.1mm )
  Ambient temperature range -20°C to +50°C (-4°F to +122°F)
ELECTRONIC ANGLE MEASUREMENT 
  Method Incremental reading
  Detecting

    Horizontal

    Vertical

2 sides

2 sides 
  Minimum reading GTS-300:0.5"/1" (0.1mgon/0.5mgon)

GTS-311:1"/5" (0.2mgon/1mgon)

GTS-312:1"/5" (0.2mgon/1mgon)

GTS-313:1"/5" (0.2mgon/1mgon)
  Accuracy GTS-300: 1" (0.2mgon)

GTS-311: 2" (0.6mgon)

GTS-312: 3" (1mgon)

GTS-313: 5" (1.5mgon)

(Standard deviation based on DIN18723)
  Circle diameter

71 mm
TILT SENSOR
  Method

Dual-axis liquid-type
  Compensating range

±3´
LEVEL SENSITIVITY  
  Plate level

30" / 2 mm
  Circular level

10´/2 mm
OPTICAL PLUMMET TELESCOPE
  Image

Erect
  Magnification

3 x

  Focusing range

0.5 m to ∞
  Field of view (at 1.3m)

4° (91mmØ)
DIMENSION 
  Instrument with handle battery 13.6 (H) x 7.5 (W) x 5.9 (D) in.

[346 (H) x 190 (W) x 150 (D) mm]
  Weight Instrument 

  (with handle battery)

13.0 lbs.(5.9 kg) 
HANDLE BATTERY BT-24QW 
  Output voltage

7.2V
  Capacity

2.8 AH
  Maximum operating time at +20°C (+68°F)
  Distance measurement

8 hours (7,000 points)

  Angle measurement only

30 hours
  Weight

2.0 lbs.(0.9 kg) 
BATTERY CHARGER BC-20BR/20CR 
  Input voltage

AC120V (BC-20BR)

AC230V (BC-20CR)
  Frequency

50/60 Hz
  Recharging time (at +20°C /+68°F)

  Handle battery BT-24QW

 1.5 hours
  Discharging time (at +20°C/+68°F)

  Handle battery BT-24QW    

8 hours (in case of full charge)
  Operating temperature

10°C to 40°C (50°F to 104°F)
  Weight

1.1 lbs. (0.5kg)
  Point guide

Factory option