Manual — Hilger Watts Theodolite

The Ultimate Guide to Hilger & Watts Theodolites: Operation, History, and Manual Resources

For the modern user, the manual is surprisingly accessible. Unlike contemporary digital manuals that focus on software interfaces, this manual focuses on principles of measurement

Built into the alidade or tribrach to center the instrument precisely over a ground station mark. 4. Setup and Leveling Procedure

A rudimentary external sight mounted on top of the telescope for rapid initial targeting. 2. The Reading System (Microptic Eyepiece) hilger watts theodolite manual

: Sellers on eBay and specialist auction sites occasionally list original manuals for sale, particularly for popular models like the "Watts (Military) No. 2 Theodolite. Operating Handbook" . A Worthpoint listing for a Hilger & Watts ST156-4 specifically noted that it came with an "Instruction book, and servicing manual".

Ensure the illumination mirrors are clean, untarnished, and angled correctly toward a light source. If using a battery attachment, check for wire corrosion or dead bulbs.

Turn the micrometer knob until the division line sits perfectly centered between the double images of the circle graduations (coincidence achievement). The Ultimate Guide to Hilger & Watts Theodolites:

. Turn the instrument 90 degrees and repeat until the bubble stays centered in all directions. Measurement

The Hilger Watts theodolite is a classic surveying instrument, and its manual is a valuable resource for surveyors, engineers, and researchers. Here's a detailed guide to help you understand and use the Hilger Watts theodolite:

: The upper part of the instrument that rotates on the vertical axis and contains the telescope and vertical circle. Setup and Leveling Procedure A rudimentary external sight

[ Objective Lens ] | [ Telescope Barrel ] --- (Focusing Ring) | (Vertical Clamp) --- [ Standards ] --- (Optical Reading Eyepiece) | [ Horizontal Clamp ] | [ Tribrach Base ] | (Footscrews x3)

Re-tighten the central fixing screw and re-verify the spirit levels. Reading the Angles on Microptic Models