Figure 11. Compass Alignment - RD Instruments WorkHorse User Manual

g. The third rotation requires the ADCP to be tilted 15 degrees in another
direction than from the first and second rotations. Follow the on-screen
instructions to orient the ADCP correctly.
h. If the calibration procedure is successful, it records the new calibration
matrix to nonvolatile memory. The ADCP will not change its matrix
unless the calibration is properly carried out.
i. If the calibration procedure is not successful, return your ADCP to the
original factory calibration, by using the AR-command. Try using the
AR-command if you have trouble calibrating your compass. In some
circumstances, a defective compass calibration matrix can prevent
proper calibration.
Place the Dummy Plug or small block under the end-cap
to make the tilt less than or equal to 20 degrees.
Figure 11.
P/N 957-6169-00 (April 2005)
Spin 90 degrees
Tilt >10 degrees
UPWARD DEPLOYMENT
Spin 90 degrees
Tilt >10 degrees
DOWNWARD DEPLOYMENT
Compass Alignment
WorkHorse Mariner ADCP User's Guide
page 21