SonTek RS5 User Manual (August 2020) 72
Mean Magnitude -
This is
the mean value of the magnetic field measured
during calibration. The units are internal to the compass itself and values are
unique to instrument and location at time of calibration. For 3D calibrations
(including pitch/roll), this value depends on the magnetic field strength both
from the instrument and from the surrounding environment. Values resulting
from two consecutive RS5 calibrations should be about the same. If a user
deploys an RS5 at same site every week, s/he should see about the same
mean magnitude each time. If the value substantially changes, sources of
magnetic interference should be investigated.
Figure 49. Compass Calibration Fail
8. After a passed calibration, there must not be any changes made to the position of
engines or mounts, or any other metal components on the boat, such as
toolboxes, electronic devices, etc, when taking the actual measurement. If any
position changes are made, the compass calibration should be repeated so that
the system can account for the new, current, magnetic field affects prior to
proceeding with the measurement.
7.5.5 System Configuration
System configuration settings (shown in Figure 50) are specific to each measurement,
location, and hardware setup. Information is entered by clicking the Change link
highlighted in Figure 50.
Summary of Contents for Sontek River Surveyor RS5
Page 1: ...RS5 USER MANUAL XA00125...
