Simrad RI9 Rudder Angle Indicator
10 20220562E
Fig. 1-10. RI9 Input signal selection
Note ! When changing from voltage to current signal (or vice versa), the
indicator may have to be recalibrated. In this case, or if the Gain and
Offset trimpot’s for other reasons are maladjusted, the following
calibration procedure should be carried out:
1. Take the rudder to midship position.
2. Use trimpot “O” (Offset) to calibrate RI9 to indicate zero rudder
angle.
3. Move the rudder to e.g. 40 degrees (starboard or port). Use trimpot
“G” (Gain) to calibrate RI9 to show the same angle as the rudder is
set to (or the same angle as shown on the autopilot display in
“Debug” mode).
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