Do you have a Hilger Watts manual or theodolite story? Share your experience in the comments below (on the original blog post). Your knowledge could help another surveyor save a piece of history.
Today, Hilger & Watts theodolites—such as the Microptic No. 1, No. 2, and the specialized Vernier models—are highly sought after by surveyors, collectors, and restoration enthusiasts. Because original paper documentation is scarce, this comprehensive guide serves as a digital manual and technical resource for identifying, operating, and maintaining these vintage optical instruments. The Legacy of Hilger & Watts Surveying Instruments
Add the degrees from the main scale to the minutes and seconds indicated on the fine micrometer scale to get your final, highly precise angular measurement. Routine Maintenance and Storage Care
If you have landed here looking for the PDF or a scanned copy of that elusive manual, you are in the right place. This article will explain the history of the instrument, the differences between the major models (the Micropic, the Tavistock, and the 20-inch), and—most importantly—the best strategies for finding, downloading, or reconstructing the original operator’s handbook. hilger watts theodolite manual
The Ultimate Guide to Hilger & Watts Theodolites: Operation, History, and Manual Resources
Features high-quality achromatic lenses with an adjustable eyepiece for focusing the crosshairs (reticle) and a main focusing knob for targeting the object.
For more information on the Hilger Watts theodolite manual, please refer to the following resources: Do you have a Hilger Watts manual or theodolite story
Whether you are looking to operate a vintage Microptic transit, perform routine maintenance, or understand the original factory specifications, this comprehensive guide serves as a practical manual for Hilger & Watts theodolites. 1. The Legacy of Hilger & Watts Instruments
The No. 2 uses a optical coincidence system to eliminate centering errors.
Avoid DIY internal adjustments unless trained; misadjustment risks more error than leaving a small known offset. Today, Hilger & Watts theodolites—such as the Microptic No
Taking a measurement requires a deliberate, step-by-step process to ensure mechanical errors (like collimation error) are minimized.
Horizontal collimation error occurs when the line of sight is not perpendicular to the horizontal axis.
