RAIS
056357/B
In- and Output Calibration
6-21
26. Carry out a first performance check now, to determine whether addi-
tional input and/or output calibration points need to be set.
In particular, check the accuracy of the input calibration by compar-
ing the angle read at the rudder stock scale with the angle indicated
on the dial on the RAC application main page in SUSI.
27. If required, set additional input calibration points, applying one of
the following strategies:
–
Either, set points at every 5° for a ±45° steering gear and every
10° for a ±70° steering gear.
This ensures optimum calibration for the angles at which the
accuracy is tested according to ISO_20673.
–
Or, determine the rudder angles where the largest errors occur
and set calibration points at exactly these angles. Repeat this
procedure until the required accuracy is met.
This ensures good calibration with as few calibration points as
possible.
28. If required, set additional output calibration points to correct the
errors in indication of the RAIs.
While it is possible to set points systematically every 5° or 10°, this
requires to adjust the output for every RAI at every point set.
It will mostly suffice to set calibration points selectively at those indi-
cations where individual RAIs exhibit the largest error.
Note
In case dummy signals or zero values have been supplied during the in-
or output calibration, the RAC may not be taken into operation yet.
The configuration of the unit is not complete before the input has been
calibrated using the actual input signal from the feedback potentiometer
and the outputs have been calibrated for the individual RAIs installed.
Summary of Contents for Rudder Angle Indicator System
Page 18: ...056357 B RAIS 1 10 Declaration of Conformity...
Page 20: ...056357 B RAIS 2 2 Normal Operational Mode...
Page 26: ...056357 B RAIS 3 6 Viewing RAC Errors through SUSI...
Page 28: ...056357 B RAIS 4 2 Maintenance by Service Personnel...
Page 58: ...056357 B RAIS 7 4 General Troubleshooting Instructions...
Page 64: ...056357 B RAIS 8 6 Replacing Alarm Output Relays...
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