Surveying Instrument Collection
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Maker |
TOPCON (Japan) |
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Model |
GTS-2 10 |
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Serial Number |
B45056 |
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Dimensions |
(Without carrying handle and clip-on battery pack) telescope length 169mm, Height 380mm, Width 195mm |
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Image |
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Description |
This GTS-2 10 semi-electronic tacheometer is a combination of an electronic distance meter (EDM) and an optical scale-reading theodolite which has been consolidated into a single very compact and light-weight unit. The axis of the infrared light beam and the optical line of sight are in coincidence, thus making possible accurate electronic distance measurements and angular measurements at one pointing of the instrument. Distance measurement starts automatically, by simply pointing to the prism, with the return signal level optimised by an automatic level control system. The measured distance is displayed by light-emitting diodes (LED's) in distinct digital readout's, directly over the telescope eyepiece, while the measured angle is numbered in one degree divisions and simply read (optically) in the field of view of the optical micrometer, from left to right, to 10 seconds of arc. In spite of it's compact size, the GTS-2 can measure distances up to 1,400 m with a single prism and 2,000 m with triple prisms, under ideal atmospheric conditions. The weight of the instrument is 6 kg (without carrying handle and clip-on battery pack). The instrument features an accurate and fast responding automatic vertical circle indexing system. The range and setting accuracy of this system is ±5' and ±0.25", respectively. The sensitivity of the circular level is 10'/2mm and the sensitivity of the plate level is 30"/2mm. The distance measurement precision is in the order of about ±(5mm+5ppm). The measurement time in FINE mode for long distances could take as long as 7 s. |
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History & comments |
This is the first mass-produced electronic tacheometer from Topcon with a balanced telescope. |
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Conservation |
Plastic carrying case (L 536mm, W 375mm, H 240mm) |
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Condition |
Good condition |
| Remarks |
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Dates |
Catalogued in 2000 |
