TracVision M5/M7 User’s Guide
94
Appendix B - Recalibration
Setting the Sensor Offset Values
The GyroTrac sensor must be mounted as close to level in pitch and
roll as possible, with its long axis parallel to the vessel’s centerline. If
the GyroTrac sensor was not mounted according to the guidelines in
the Installation Guide, you need to adjust the sensor offset values to
compensate for variances when pitch, roll, and azimuth references
cannot be met.
NOTE:
The maximum offset values for pitch and roll are ±45°; the maximum
offset value for azimuth is ±180°.
NOTE:
Pitch, roll, and yaw settings are determined by the GyroTrac sensor,
not external hardware.
Step 1 - Zero All Offset Values
Use the flowchart in Figure 3 on page 95 to enter zeros for all
measurements.
Step 2 - Record the Difference in Offset Values
Now you need to record the difference in the offset values displayed.
Navigate to the Pitch, Roll, and Yaw display. Then record the values
displayed for pitch, roll, and yaw (see “Pitch, Roll, and Yaw” on
page 27 for more information).
Step 3 - Enter Inverse Offset Values
Use the flowchart in Figure 3 on page 95 to enter the inverse values for
the measurements you recorded earlier (positive becomes negative,
negative becomes positive). An example of offset value compensation
is provided in Figure B-8.
Figure B-8 Example of Offset Compensation
For Recorded Offset:
Enter Offset:
-10.0
°
10.0
°
12.6
°
-12.6
°
