L3 comminications SERIES 5000, Operation And Maintenance Manual

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D-52
APPENDIX D General Setup, Configuration and Troubleshooting
Series 5000 Sonar System Operations and Maintenance Manual P/N 11210060, Rev. 13.0
D.8.17 Calibrating the Compass
Starting with version SonarPro 5.2 a Compass Calibration Wizard was added.
To start the Compass Calibration Wizard, click
Run Compass Calibration Wizard
on the Towfish Diagnostics tab of the Sonar Interface dialog box. Follow the
instructions and play the demonstration animation.
The compass calibration must be done away from all magnetic and metal sources,
most likely off the ship. You enable the towfish compass calibration mode and
then rotate the towfish slowly 360 degrees in a circle (more than a minute). At the
same time you must pitch and roll the towfish beyond its 20 degree limits, we
suggest 45 degrees to be safe.
The compass calibration can also be done by manually entering commands in the
Operator command
area of the Towfish Diagnostics tab. After entering a
command, click
Send Command
to send the command to the towfish.
To calibrate the compass manually, enter the following commands in the order
shown.
$TWF:
Turn off transducer transmitter.
$TA0:
Turn off altimeter transmitter.
$Ch: Halt compass transmission.
$Cmpcal=d:
Disables compass multi-point calibration mode.
$Ccc:
Clears compass calibration table.
$Cmpcal=e:
Enables multi-point calibration.
$Cgo:
Starts compass for calibration. Rotate the towfish 360
degrees while rotating the towfish through the limits of
pitch and roll. This should be done over a time frame of
1 minute.
$Ch:
Halt compass calibration.
NOTE Excellent calibration results have been obtained by enabling the
compass calibration and towing the towfish in a series of three circles with
the boat.
NOTE If trying the method mentioned in the note above, survey the area
first making sure you have enough water to operate safely since the
transmitters are turned off.