David White Realist TR-300 4.5 - User Manual

Using the Transit
David White Instruments Realist TR-300 4.5" Transit
Telescope in
normal reading
orientation
Cross-hair focus
Compass
Upper tangent
screw
Upper clamp
Vertical clamp
Focus
Vertical tangent
screw
Lower clamp
& tangent screw
Vertical circle&
vernier
Plate levels
Capstan screws:
top
bottom
Horizontal circle &
vernier
Leveling screws
Upper clamp &
tangent screw

Summary

Transit Setup and Operation

Adjusting a Plate Bubble Level

Procedure to level the transit using plate levels, involving rotation and adjustment screws.

Clamps and Tangent Screws

Explanation of the three clamp and tangent screw pairs for fine adjustments of the transit.

Reading Horizontal Azimuths

Reading Vertical Angles

Reading Distances Using Stadia Rod

David White Realist TR-300 4.5 Specifications