Chapter 3
Theory of Operation
Trimble S, VX, SPS & RTS Service Manual3 - 42 P/N 57150002, Revision 5.0
F
Automatic correction for trunnion axis tilt
The trunnion axis tilt error is the difference between the trunnion axis and the plane perpendicular to
the plumb axis. In the Trimble S6 the trunnion axis tilt error can be determined by performing a pre
measurement trunnion axis tilt test. Angular measurements are observed on both instrument faces to
enable the horizontal tilt axis error to be calculated and the respective correction value to be stored in
the instrument. The horizontal tilt axis correction value is then applied to all subsequent horizontal
angles.
Arithmetic averaging for reducing sighting errors
The Trimble S6 automatically reduces sighting errors caused by misaligning the instrument to the
target or by movement during measurement. The sighting errors can be reduced by:
Using Autolock technology. When Autolock is enabled the instrument will automatically lock to and
track the target. Manual sighting errors are therefore reduced.
SurePoint accuracy assurance. When the Trimble S6 is manually aimed at a target the servo motors
are finely tuned to hold the aimed angle. SurePoint ensures that sighting errors due to unintentional
small movements of the instrument are eliminated. SurePoint is not available on the Trimble S3 Total
Station.
Automatically averaging angles during distance measurement. When measuring in STD mode
the instrument will take approximately 1.2 seconds to measure the distance. Fully synchronized
angles and distances are averaged over the measurement period to obtain an averaged, highly accurate
measurement.
Using averaging measurement methods in the Trimble field software. Measurement methods are
available, which allow a defined number of measurements to be observed and a resultant averaged
measurement to be stored in addition.
To Next Page
Loading...
Need help?
General
