Treat the Hilger & Watts theodolite as a mechanical clock. It is robust but relies on friction and precise glass wedges. The key skill is the Coincidence Reading —aligning those lines perfectly before writing down the number. If your FL and FR angles differ by more than a few seconds on horizontal measurements, re-level the plate bubble.
A very specific request!
: The total angle is the sum of the main circle reading and the micrometer displacement 4. Maintenance and Care : Only use soft brushes or specialized lens tissue for optical surfaces hilger watts theodolite manual
A typical Hilger & Watts manual—such as those for the widely used models—follows a logical progression designed to ensure sub-second accuracy in the field: Treat the Hilger & Watts theodolite as a mechanical clock