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Review Total Station Topcon GTS-820Aseries
Auto tracking
total station GTS-820Aseries
*D : measuring
distance (mm)
** : Standard deviation based on DIN18723
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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.
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Model |
GTS-821A
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GTS-822A
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GTS-823A
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GTS-825A
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Telescope | ||||
Length |
166mm
|
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Objective Lens Dia. |
50mm
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Magnification( × ) |
30 ×
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Image |
Erect
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Field of View |
1°30′
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Resolving Power |
3″
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Min. Focus Distance |
1.3m
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Distance Measurement | ||||
Measuring Range 1 Prism 3 prism 9 prism |
2,200m 2,800m 3,600m |
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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. |
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Least Count Measurement Fine measurement mode Coarse measurement mode |
1mm/0.2mm 10mm/1mm |
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Measurement Display |
10 digits: max. display ±999999.9999
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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.) |
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Angle Measurement | ||||
Method |
Absolute reading
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Horizontal/Vertical |
2 sides/2 sides
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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
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Coarse movement |
Shuttle control
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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) |
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Search Range | User definable | |||
Auto Tracking Range Prism unit type A3/A3s Prism 2 |
10m to 500m 8m to 800m |
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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 |
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Display | Graphics LCD 40 characters × 10lines (240 × 80 Dots) w/backlight heathr |
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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 |
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Interface | ||||
Serial I/F | RS-232C | |||
Parallel I/F | For printer: Centronics Standard (12 pin) | |||
Other | ||||
Instrument height |
196mm
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Level sensitivity Circular level Plate level |
10″ / 2mm 30″ / 2mm |
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Optical plummet Magnification Focusing range Image |
3x 0.5m to infinity Erect |
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Point Guide/Tracking indicator |
Provided
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Dimension |
211(L)×229(W)×325(H)mm
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Weight Instrument(with battery) Plastic Carrying Case |
7.7kg 5.4kg |
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Durability Dust/Water protection Ambient Temperature Range |
IP54 -20°C to + 50°C |
** : Standard deviation based on DIN18723