BT2 user manual - H-5911-9004-02-B Page | 12
3.4 Gyro check
After the probe is retrieved from the hole it is possible to perform a gyro check to confirm that the dynamics, shocks
and rotations experienced during the deployment have not caused the gyro to drift or lose accuracy.
As long as the Broretrak2 is still aligned, place the probe back on the alignment jig and select Align > Verify
Alignment. An error factor is displayed to give an indication of the change in angle during the survey. See section
15.2.2.
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