Spectra Geospatial Focus 35, Руководство пользователя

Страница: 88 / 109

6 Instrument Technology
values are then applied to all subsequent angle measurements, including the distance related focus lens
collimation error. Angles observed in a single face are corrected for collimation errors, which eliminates
the need to measure in both instrument faces.
Carry out a collimation test in the following situations:
l
Whenever the instrument may have been roughly handled during transport.
l
When the ambient temperature differs by more than 10 °C (18 °F) from the previous collimation test
temperature.
l
Immediately prior to high precision angle measurements in one face.
FOCUS 35 Total Station with LockNGo Tracker
A FOCUS 35 Total Station with LockNGo capability can automatically lock and track a prism target as it
moves. Pointing errors caused by slight misalignment of the instrument’s tracker have a similar effect to
the HA and VA Collimation errors as detailed above.
To correct for the tracker collimation errors, carry out a LockNGo Tracker collimation test. The
LockNGo Tracker collimation test automatically observes angular measurements to a target in both
faces, the tracker collimation errors are calculated and the respective correction values are stored in
the instrument.
The collimation correction values are then applied to all subsequent angle measurements observed when
LockNGo Tracker is enabled. Angles observed in a single face are corrected for collimation errors, which
removes the need to measure in both instrument faces.
Carry out a LockNGo Tracker collimation test in the following situations:
l
Whenever the instrument may have been roughly handled during transport.
l
When the ambient temperature differs by more than 10 °C (18 °F) from the previous collimation test
temperature.
l
Immediately prior to high precision angle measurements in one face.
FOCUS 35 Total Station User Guide | 88