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Total Station Topcon GTS-820Aseries

Auto tracking total station GTS-820Aseries

GTS-820A
GTS-820A
The GTS-820A series inherits the functions and operability of the GTS-810A series and incorporates the CCD tracking system. Tracking speed, accessible distance and search operation drastically improved. The new tracking system and area CCDs quickly seek the prism center to improve detection sensitivity.
Product features
1. Very fast auto tracking speed.
Model
GTS-810A
GTS-820A
Auto tracking speed
10°/sec
12°/sec
2. Longer tracking distance
Model
GTS-810A
GTS-820A
Auto tracking range
700m
800m
<Specification>
Model
GTS-821A
GTS-822A
GTS-823A
GTS-825A
Telescope
Length
166mm
Objective Lens Dia.
50mm
Magnification( × )
30 ×
Image
Erect
Field of View
1°30′
Resolving Power
3″
Min. Focus Distance
1.3m
Distance Measurement
Measuring Range
1 Prism
3 prism
9 prism

2,200m
2,800m
3,600m
Condition: Sight haze with visibility about 20km moderate sunlight with light heat shimmer.
Accuracy
Fine measurement mode
Coarse measurement mode

±(2mm+2ppmxD*) m.s.e.
±(10mm+2ppmxD*) m.s.e.
Least Count Measurement
Fine measurement mode
Coarse measurement mode

1mm/0.2mm
10mm/1mm
Measurement Display
10 digits: max. display ±999999.9999
Measuring time
Fine measurement mode

Coarse measurement mode

1mm: Approx. 1.2 sec. (Initial 4 sec.)
0.2mm: Approx. 2.8 sec. (Initial 5 sec.)
10mm: Approx. 0.4 sec. (Initial 3 sec.)
1mm: Approx. 0.7 sec. (Initial 3 sec.)
Angle Measurement
Method
Absolute reading
Horizontal/Vertical
2 sides/2 sides
Minimum reading 0.5″ /1″ (0.1 / 0.5mgon) 1″ /5″ (0.2 / 1mgon)
Accuracy** 1″
(0.3mgon)
2″
(0.6mgon)
3″
(1mgon)
5″
(1.5mgon)
Diameter of circle 71mm
Servo Mechanism
Driving Range
All range rotating
Coarse movement
Shuttle control
Fine movement Jog Control (Min. 1 sec)
Max. Rotating Speed 50° / sec
Auto Tracking
Max. Auto Tracking Speed 12° / sec
(Max. trackable speed/100m : 76km/h)
Search Range User definable
Auto Tracking Range
Prism unit type A3/A3s
Prism 2

10m to 500m
8m to 800m
Collimation Accuracy 3″ (Standard deviation of repeatability)
Laser safety Class 2
Tilt Correction
Type Dual axis
Method Liquid type
Compensating range ±4′
Correction unit 1″ (0.1mgon)
Computer unit
OS MS-DOS® ver.3.22
Internal memory
System memory
Program memory
Main memory
Application program & Data memory

FEEPROM 512KB
FEEPROM 1MB
SRAM 640KB
FEEPROM 4MB
Display Graphics LCD 40 characters × 10lines (240 × 80 Dots)
w/backlight heathr
Calendar clock Provided
Card system
(Type I/II)
PC Card Standard 95 Max./32MB 5.0V
Surveying data (Dist, Ang, Coordinate)
Setting out coordinate, AP software
Interface
Serial I/F RS-232C
Parallel I/F For printer: Centronics Standard (12 pin)
Other
Instrument height
196mm
Level sensitivity
Circular level
Plate level

10″ / 2mm
30″ / 2mm
Optical plummet
Magnification
Focusing range
Image

3x
0.5m to infinity
Erect
Point Guide/Tracking indicator
Provided
Dimension
211(L)×229(W)×325(H)mm
Weight
Instrument(with battery)
Plastic Carrying Case

7.7kg
5.4kg
Durability
Dust/Water protection
Ambient Temperature Range

IP54
-20°C to + 50°C
*D : measuring distance (mm)
** : Standard deviation based on DIN18723