Hilger Watts - Theodolite Manual [verified]

A sensitive spirit level tube mounted on the rotating upper instrument plate (alidade) used for precise leveling.

Typically a three-screw leveling base used to perfectly level the instrument using the circular and plate bubbles. hilger watts theodolite manual

Online communities like the Weebly page on Watts/Cary Porter models often host scanned documents. A sensitive spirit level tube mounted on the

Loosen the tripod centering screw slightly and slide the instrument on the tripod head until the optical plummet is perfectly centered on the ground mark. Retighten and recheck the levels. 5. Reading the Optical Circles hilger watts theodolite manual

This feature solves the biggest problem with vintage Hilger & Watts manuals: It bridges the gap between a history book and a service manual.