Hilger Watts Theodolite Manual =link=

Mechanical components use specialized, low-viscosity instrument grease. Standard lubricants (like WD-40 or heavy grease) will gum up the internal gears, cloud the internal glass optics, and ruin the instrument.

Older models utilizing mechanical vernier scales on brass or metal plates, requiring an external magnifying glass to read. 2. Anatomical Breakdown of the Instrument

Theodolites manufactured by Hilger & Watts are legendary in the fields of surveying, engineering, and meteorology. Known for their precision, robust construction, and advanced optical systems, a (often a Microptic model or a specialized Pilot Balloon instrument) represents a pinnacle of 20th-century optical engineering. hilger watts theodolite manual

Add the main scale reading to the fractional estimation to find your final angle. Reading a Microptic No. 2 (1-Second Instrument)

If you are looking for a specific model's manual (like the Microptic ST1 or a specific year of the Pilot Balloon theodolite), searching for the specific model number in the Met Office repository is a great place to start. To provide more tailored information, could you tell me: Add the main scale reading to the fractional

Note: Hilger & Watts produced several theodolite models (e.g., TM 1A, TM 6, 20-second, 1-second). The following is a general guide applicable to their classic 6-inch (150mm) glass circle theodolites, which are the most common in collections and field use today.

Avoid DIY internal adjustments unless trained; misadjustment risks more error than leaving a small known offset. To provide more tailored information

Reads directly to 1 second of arc via an internal optical micrometer.

Never wipe glass lenses with dry cloths or fingers. Use a soft camel-hair brush to remove dust. If necessary, use pure isopropyl alcohol and high-quality optical tissue applied in a gentle circular motion.