. Any significant deviation indicates a collimation error that requires mechanical adjustment via the reticle screws. 6. Sourcing Original Manuals and Digital PDFs
Hilger & Watts changed designs subtly over decades.
Vintage optical instruments require careful maintenance to retain their legendary precision. Checking for Collimation Error
A vintage manual is an invaluable resource for "Field Adjustments." It provides step-by-step instructions on: hilger watts theodolite manual
Always lock the transit clamps lightly when storing the instrument in its fitted metal or wooden case. Carry the case using the provided handles; never drop or subject it to heavy vibrations. 5. Troubleshooting Common Issues
Three-screw tribrach, often featuring an integrated optical plummet.
According to standard theodolite operating guides 0;52;, successful measurement requires a specific setup sequence: 0;265;0;418; Sourcing Original Manuals and Digital PDFs Hilger &
Add the main scale reading to the fractional estimation to find your final angle. Reading a Microptic No. 2 (1-Second Instrument)
Each window contains a main scale graduated in degrees (and sometimes 10-minute intervals).
Refocus the crosshairs against a plain background before aiming at the target. Dried-out whale oil or grease Carry the case using the provided handles; never
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: 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.