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This Zeiss 1 Th 2 Optical Micrometor Theodolite is a highly accurate Instrument. Fields of application include precise angular measurement for traversing, first and second-order triangulations, plumbing, diatance measuring with subtense bar and establishing astronomical positions. The discription that follows is an aproximation of the features of this instrument and is copied from other sources to aid in the Use and function of this equipment: This instrument, as with the Zeiss Th 2, also features the "ball-and-socket" levelling system. Some other features of the theodolite include: optical plummet built into the alidade, combined coarse-fine focusing drives, automatic vertical circle indexing system featuring a V-type compensator, inverted telescope image and a sighting collimator for rapid and convenient coarse pointing. Simultaneous viewing of the horizontal and vertical circles eliminates the need for changing over between readings. Also, the graduation images of the horizontal and vertical circles are colour coded for easy differentiation (blue for vertical and yellow for horizontal).The graduation interval of the horizontal and vertical circles is 1 degree, the optical scale interval is 1 minute (1') and estimation can be made to 6". The diameters of the horizontal and vertical circles are 98 mm and 85 mm respectively. The sensitivity of the plate level is 30" per 2 mm and the setting accuracy of the compensator is approximately ±1". The magnification of the telescope is 25x, the diameter of the objective lens of the telescope is 35 mm, and the shortest pointing distance is approximately 1.2 metres.The instrument's plastic case is fitted with a number of accessories including a plumb bob and a cylinder telescopic attachment for glare reduction. Two 1 Th 2 Theodolite optical micrometers At this time the units are untested. The power supply is questionalble and need testing. There are tools and storage cases and misc. pieces. A 12 volt laser and other survey tools are included but we don't know their function. There is no power supply for the laser that we have found. All Ziess made and in beautiful condition. Effort has been made to provide accurate information and photo to match the items, however, there may be inaccuracies in the information and there may be errors or substitutions in photo matching. A.I. Scientific. will try to provide resolution to these inaccuracies as we are made aware of them but assumes no responsibility for any inaccuracies, including without limitation any pictures, descriptions or other information relating to the assets as contained on the website, A.I. Scientific., or other communications, electronic or otherwise. |
