5-6
4125 SIDE SCAN SONAR SYSTEM 0004823_REV_C
5
To perform the hard iron calibration:
1. Set up the platform with the tow vehicle on it well away from any metal objects, such as buildings
or cars.
2. Activate the system.
3. Verify that the platform remains level to within a degree when rotating it 360 degrees by
observing the Pitch and Roll displays.
4. Close the Sonar.exe window on the desktop.
5. Using the remote desktop program Choose
Start/Programs/Accessories/Communications/HyperTerminal.
6. In the Connect To dialog box, select COM3 from the Connect Using drop-down list box, and then
click OK.
7. In the Port Settings dialog box, click Restore Defaults.
8. Select 19200 from the Bits per second drop-down list box, and then click OK.
The COM3 window opens.
9. Confirm that there are compass data being received in the COM3 window as shown in Figure 5-6.
10. Press <Esc>, and then uppercase "C."
11. Slowly rotate the tow vehicle at least 360 degrees, taking at least 20 seconds to do so, and
stopping the calibration by pressing the Space bar when "….." is observed in the COM3 window
as shown in Figure 5-7.
12. Turn the tow vehicle 90 degrees on its side such that the towing arm is parallel to the platform.
13. Press <Esc>, and then uppercase "Z."
14. Slowly rotate the tow vehicle at least 360 degrees, taking at least 20 seconds to do so, and
stopping the calibration by pressing the Space bar when "….." is observed in the COM3 window
as shown in Figure 5-8.
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