Hilger Watts Theodolite Manual ❲Edge❳

The scale is subdivided into tens of minutes (e.g., 10', 20', 30', 40', 50').

Look through the reading eyepiece. Turn the micrometer knob until the graduation lines in the main scale window are perfectly centered within the indexing forks. Once centered, read the main degrees and minutes from the upper window, and read the fine single minutes and seconds from the lower micrometer window. Combine the two readings for your final ultra-precise measurement. 5. Maintenance, Storage, and Calibration

[ Objective Lens ] | [ Telescope Barrel ] --- (Focusing Ring) | (Vertical Clamp) --- [ Standards ] --- (Optical Reading Eyepiece) | [ Horizontal Clamp ] | [ Tribrach Base ] | (Footscrews x3) hilger watts theodolite manual

Never wipe lenses with a dry cloth or fingers. Use a soft camel-hair brush to blow away loose dust, then use lint-free lens tissue dampened with a drop of specialized optical cleaner or pure isopropyl alcohol. Wiping in a gentle circular motion from the center outward.

Sight the first point, release the horizontal circle clamp, and turn the scale to zero using the micrometer knob [2]. The scale is subdivided into tens of minutes (e

Set the tripod over the point, ensuring the head is roughly level [3].

One of the most defining characteristics highlighted in any Hilger Watts theodolite manual is the . Instead of reading degrees and minutes off a metal vernier, operators look through a dedicated reading eyepiece positioned near the main telescope. When you look through the reading eyepiece: Once centered, read the main degrees and minutes

Never force any knob or screw. If a tangent screw stops turning, it has reached the end of its thread; back it off and readjust coarse alignment. Never use heavy household lubricants or WD-40 on the internal gears, as they will attract dust and gum up the fine mechanics.