A step-by-step guide is given in the 1986 training film: "Setting up a theodolite -- Measuring horizontal angles -- Measuring vertical angles -- Packing up".
The Hilger & Watts theodolite is a classic example of British optical engineering, widely regarded for its durability and precision in mid-20th-century surveying. While modern "total stations" have largely replaced traditional theodolites in high-tech applications, these manual instruments remain highly effective for construction layout and educational purposes. 1. Key Components and Features
A rudimentary external sight mounted on top of the telescope for rapid initial targeting. 2. The Reading System (Microptic Eyepiece)
Here are a few ways we can build on this guide to make it more useful for you: hilger watts theodolite manual
[ Telescope Focus Ring ] | [ Eyepiece Focus ] ------ [ Optical Sight ] | [ Vertical Circle Housing ] | [ Circle Reading Eyepiece ] | [ Upper Tangent Screw ] --- [ Plate Bubble Level ] | [ Lower Tangent Screw ] | [ Tribrach Base ] | [ Levelling Footscrews ]
Look through the optical plummet eyepiece located near the base of the instrument.
We can create a step-by-step guide on performing a to check and adjust the instrument's collimation error. A step-by-step guide is given in the 1986
to align the instrument directly over the ground marker by sliding it across the tripod head. Adjust the tripod legs to level the circular bubble for rough positioning. three footscrews on the base to precisely center the plate level bubble
Rotate back to the original position to verify, and repeat until the bubble stays centered in all directions. Step 3: Focusing the Optics
Look at the scale to find the last passed whole-degree graduation number. The Reading System (Microptic Eyepiece) Here are a
Exterior polished metal scales read via external magnifying glasses. 3. Anatomy of a Microptic Theodolite
Taking a measurement requires a deliberate, step-by-step process to ensure mechanical errors (like collimation error) are minimized.
Formed in 1948 by the merger of Adam Hilger Ltd. and E.R. Watts & Son, the British manufacturer Hilger & Watts became a global benchmark for optical surveying technology.