Hilger Watts Theodolite Manual !!top!!

Use the horizontal fine adjustment screw for precise alignment [3]. Measuring Vertical Angles Sight Object: Focus the telescope on the target.

of your Hilger & Watts theodolite? Share public link

Lock the horizontal and vertical clamps and use the tangent screws for perfect crosshair alignment on your target. hilger watts theodolite manual

Periodic checks (every 3-6 months):

Unlike modern digital theodolites, Hilger Watts models use a complex optical micrometer to interpolate between the graduation marks on the glass circles. The manual provides the exact procedure for: Use the horizontal fine adjustment screw for precise

: To eliminate any slight misalignment (index error), take two readings of the same angle—once with the telescope in its "normal" position and once after flipping it 180°. The average of these two readings will give you the true, error-free angle.

If you need an actual for a specific Hilger Watts model (e.g., Microptic 2″ ), I can point you to archive sources or help interpret a manual you already have. Let me know which model you’re working with. Share public link Lock the horizontal and vertical

This is a comprehensive guide to operating and understanding the (specifically the popular Watts No. 1 and No. 2 models). These are classic British surveying instruments from the mid-20th century, renowned for their precision and tank-like durability.