Specifications

Theodolite Data Recording System

This system was designed to allow the operator of the theodolite to continuously track a target, such as a balloon, and have azimuth and elevation readings automatically recorded. This system can be operated by one man and eliminates operator reading and recording errors. The operator can concentrate on tracking the target and does not have to stop to take readings or take time to reacquire a lost sighting. The Data Recorder can be set to take angular and time readings at various time intervals from 1 second to 99 seconds or greater if needed. The readings can be recorded on the paper tape print out or stored for downloading into a computer through an RS232 port. The system is battery operated for ease of operation in remote locations.

Telescope: Bent axis type with 21 power main telescope and 4 power wide angle finder telescope viewed through the one eyepiece. Length, 13.1", counterbalanced, moisture and dust proof-internal focusing by rack and pinion - minimum focus 100' with 21x power - all lenses with low reflection coating.
Main Telescope: 42mm diameter achromatic doublet objective - effective aperture 40mm - resolving 4 seconds - 2 degree field of view.
Finder Telescope: 17mm diameter achromatic doublet objective - effective aperture 15mm - field of view 10 degrees.
Eyepiece: Four element achromatic - .074" diameter exit pupil - 15/32" eye relief - molded soft rubber eye guard.
Sights: Two pair, one fixed, one folding (hinged), mounted on telescope for quick alignment and spotting.
Azimuth and Elevation Scales: Precision divided and engraved to single degrees. Quick release micrometer worm drive with drum reading to 1/10th degree. (See below for 20-8350)
Illumination: Rheostat controlled lamp for illuminating cross hair reticule - shielded light for both the azimuth and elevation scales.
Standards: Sturdy A shape with vee type bronze bearings and self-adjusting bronze fixation bearings in standard caps.
Centers: Long taper double cone centers of hard bronzes - precisely fitted for long wear - concentric with vertical axis.
Leveling Head: Sturdy, four screw type - durable, dust protected, precision fitted, non-cramping, leveling screw - tripod plate U.S. Standard 3-1/2 x 8 thread.
Battery Box: Attached to all theodolites. (Removable). Mounts to standard of instrument-holds 2 batteries (D cell). Power for illuminating cross hair reticule, azimuth and elevation scales.
Model No. 20-8350 Azimuth and Elevation: tangent screw micrometer drums, 1-3/8" diameter and periphery graduated in 50 parts. Permits ground observer to read both azimuth and elevation angles direct to 1/50 of a degree.
Azimuth Potentiometer: precision 5000 ohm, 10 turns (10 degrees)
Elevation: Potentiometer precision, 5000 ohm, 3 turns (3 degrees)
All Models are furnished complete in substantial carrying case and with the following accessories - waterproof canvas cover, sunshade, adjusting pins, spanner wrench, accessory tool, screwdriver, spare bulbs and Handbook Instruction Manual. Shp. Wt. 55 lbs.

Detailed Description

Features

Specifications