Direct reading to 20 seconds of arc, with easy estimation to 5 seconds.
To precisely center the instrument over a survey mark. 3. Setting Up the Hilger & Watts Theodolite
Formed in 1948 by the merger of Adam Hilger Ltd. and E.R. Watts & Son, the company combined cutting-edge optical engineering with masterful mechanical craftsmanship.
Set the tripod over the point, ensuring the head is roughly level [3]. hilger watts theodolite manual
The Microptic No. 2 is a highly precise optical micrometer theodolite designed for high-order surveying and industrial metrology.
Because these instruments have been out of production for decades, you won't find them at your local hardware store. However, a thriving community of antique surveying equipment collectors and engineering historians has made many of these documents available online.
Secure the theodolite tribrach to the tripod head using the central fastening screw. Direct reading to 20 seconds of arc, with
This is the most unique part of Hilger & Watts instruments. The manual describes a :
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.
Carefully remove the theodolite from its carrying case, holding it securely by its standards or base—never by the telescope barrel. Setting Up the Hilger & Watts Theodolite Formed
Factory-only adjustments (e.g., circle graduation errors) are clearly marked.
Fine-adjustment screws used to gently nudge the telescope vertically or horizontally after the main clamps are locked.