Read the primary degrees and tens of minutes from the main scale, then add the single minutes and seconds indicated on the sub-micrometer scale. 4. Maintenance, Storage, and Calibration
. Any significant deviation indicates a collimation error that requires mechanical adjustment via the reticle screws. 6. Sourcing Original Manuals and Digital PDFs hilger watts theodolite manual
Slide the theodolite across the flat tripod head until the plummet crosshairs sit exactly over the ground mark. Tighten the tripod centering screw completely. Step 4: Leveling the Instrument Read the primary degrees and tens of minutes
Vintage Hilger & Watts instruments are built to last generations, but they require proper care to prevent degradation. hilger watts theodolite manual