Maker

Topcon, Japan

Model

ET-1

Serial Number

F30405

Dimensions

210 X 180 X 365 mm

Image

Description

Electronic tacheometer (electronic theodolite with built-in electronic distance meter). Accuracy: horizontal directions +/- 2" , zenith angles +/- 3", slope distance +/-(5 mm + 5 ppm) . This instrument type was the first fully electronic tacheometer produce by Topcon. It includes a tribrach and a battery that sits on top of the standards. Measurements can be triggered without touching the instruments (use of light barriers). Weight with battery: 8.3 kg.

History & comments

This isntyrument was purchased by UNSW second hand from the (NSW) Department of Main Roads in 1994.

Conservation

In yellow transport boxe ( 530 x 370 x 240 mm)

Condition

A lot of scratches on paint. The instrument exhibits intermittent problems (of low supply voltage) and is, thus, not fully operational.

Remarks

Carries the labels 'DMR-72', UNSW 'No. 2'.

Dates

Manufactured ca. 1983.

Catalogued by J. M. Rüeger on 3 December 2002.