Rotate the instrument 90° and use the third screw to center the bubble [3]. Repeat until the bubble remains centered in all positions. 3. Reading the Circles
If the vertical circle does not read 90° when the telescope is horizontal, use the index adjustment screw [2].
Always store the theodolite in its original case with a packet of fresh silica gel to absorb moisture. Store it in a climate-controlled room. Excess humidity can cause fungus to grow between the internal prisms, ruining the internal optics. 6. Where to Find Original Manuals and Resources hilger watts theodolite manual
Look through the small circle reading eyepiece located next to the telescope.
Hilger & Watts Microptic Theodolite is a precision optical instrument manufactured from the late 1940s through the 1960s. These instruments are renowned for their compact design , weighing approximately 9 pounds (4 kg), and their use of etched glass circles for high-accuracy angle measurement. Science Museum Group Collection Key Specifications and Models Model No. 1 Rotate the instrument 90° and use the third
The Hilger & Watts Microptic theodolite is a compact, high-precision transit instrument . Its key features include: Science Museum Group Collection Optical Micrometers : Used for accurate readings on glass circles. Internal Illumination : Often equipped for low-light use. Transit Telescope : Designed to swivel completely, allowing for quick back-sighting and error correction. Science Museum Group Collection 2. Setup and Leveling accuracy and precision in measurement: : Secure the instrument to the using the central mounting knob.
Secure the theodolite to the tripod head using the central fixing screw. Reading the Circles If the vertical circle does
Looking for the Hilger Watts theodolite manual? This classic optical theodolite—used for precise angular measurements in surveying and engineering—has a well-regarded manual that covers setup, leveling, collimation, reading micrometer verniers, maintenance, and care. Key points to highlight in a post: