This allows you to orient the instrument's zero reference.
Repacking a vintage Hilger & Watts theodolite (like the popular No. 2 Microptic
Whether you are restoring a microptic theodolite No. 1, recalibrating a Watts ST‑200 for workshop use, or simply fascinated by the precision of optical instruments, having access to a well‑repacked manual transforms a vintage theodolite from a museum piece into a working tool. The circle‑reading instructions, collimation adjustments, and case‑care details printed decades ago remain as relevant today as they were when a surveyor first opened the case on a hillside in Kent or a mine shaft in Wales. The manual repack is the key that unlocks that continuing utility—and a tribute to the engineering excellence of Hilger & Watts.
Use a soft camel-hair brush to remove field dust, grit, and moisture from the metal limbs, leveling screws, and optical surfaces.
: The main spindles that allow the telescope to transit or rotate.
A clear, parallax-free image is essential for accurate readings.
Locate and remove the horizontal circle setting knob or lever assembly.
Before breaking any seals or loosening structural screws, a contamination-free workspace and specialized tool kit must be prepared.
Before loosening any screws, understand that mechanical alignment and optical alignment are interdependent on this instrument.
: Gasoline or specialized degreasers for removing old, hardened grease.
Hilger & Watts transit cases are highly engineered, form-fitting shells. They do not rely on generic foam; instead, they feature specific wooden blocks, brass brackets, or molded rubber cushions that mirror the contours of the instrument. The Three-Point Base Alignment
These instruments typically included a for sighting, horizontal and vertical circles for angle measurement, spirit levels for precise levelling, and a tribrach for mounting on a tripod. Some models also featured an optical plummet for accurate centering over a point, and an optical micrometer for reading angles to fractions of a minute of arc. The Watts microptic theodolite No. 1 Mark IV, for example, included an optical micrometer , spirit levels , an optical plummet , and a hard-wearing carrying case, making it a complete field instrument.
A fine-tip permanent marker or a brass scribe to make internal registration marks (witness marks) for alignment. Tweezers: Non-magnetic, fine-tip ESD tweezers.
This allows you to orient the instrument's zero reference.
Repacking a vintage Hilger & Watts theodolite (like the popular No. 2 Microptic
Whether you are restoring a microptic theodolite No. 1, recalibrating a Watts ST‑200 for workshop use, or simply fascinated by the precision of optical instruments, having access to a well‑repacked manual transforms a vintage theodolite from a museum piece into a working tool. The circle‑reading instructions, collimation adjustments, and case‑care details printed decades ago remain as relevant today as they were when a surveyor first opened the case on a hillside in Kent or a mine shaft in Wales. The manual repack is the key that unlocks that continuing utility—and a tribute to the engineering excellence of Hilger & Watts.
Use a soft camel-hair brush to remove field dust, grit, and moisture from the metal limbs, leveling screws, and optical surfaces. hilger watts theodolite manual repack
: The main spindles that allow the telescope to transit or rotate.
A clear, parallax-free image is essential for accurate readings.
Locate and remove the horizontal circle setting knob or lever assembly. This allows you to orient the instrument's zero reference
Before breaking any seals or loosening structural screws, a contamination-free workspace and specialized tool kit must be prepared.
Before loosening any screws, understand that mechanical alignment and optical alignment are interdependent on this instrument.
: Gasoline or specialized degreasers for removing old, hardened grease. 1, recalibrating a Watts ST‑200 for workshop use,
Hilger & Watts transit cases are highly engineered, form-fitting shells. They do not rely on generic foam; instead, they feature specific wooden blocks, brass brackets, or molded rubber cushions that mirror the contours of the instrument. The Three-Point Base Alignment
These instruments typically included a for sighting, horizontal and vertical circles for angle measurement, spirit levels for precise levelling, and a tribrach for mounting on a tripod. Some models also featured an optical plummet for accurate centering over a point, and an optical micrometer for reading angles to fractions of a minute of arc. The Watts microptic theodolite No. 1 Mark IV, for example, included an optical micrometer , spirit levels , an optical plummet , and a hard-wearing carrying case, making it a complete field instrument.
A fine-tip permanent marker or a brass scribe to make internal registration marks (witness marks) for alignment. Tweezers: Non-magnetic, fine-tip ESD tweezers.