2.1.4
ANGLE MEASUREMENT SYSTEM CHAPTER 1
GEODIMETER SYSTEM 600
Correction for Collimation Errors
By carrying out a simple pre-measurement test procedure,
both horizontal and vertical collimation of the instrument can
be quickly measured and stored. All angles measured
thereafter are automatically corrected. These collimation
correction factors remain in the internal memory until they
are measured again.
Correction for Trunnion Axis Tilt
During the same pre-measurement test procedure, it is also
possible to measure and store angular imperfections of the
horizontal tilt axis relative to the horizontal axis. This stored
correction factor is applied automatically to all measured
horizontal angles.
When should these tests be carried out?
1. After transport where hard handling may have occured.
2. When the temperature differs by > 10°C from the previous
application.
3. If you have changed the keyboard unit configuration since
the latest calibration. (You can use one, two or none key
board unit).
4. Immediately prior to high precision angle measurement.
How are these tests carried out?
See "Test Measurements", part 1, page 1.2.19.
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