ComNav Commander P2 - Heading Rate Stabilizer

ComNav Commander P2 & P2VS Installation & Operation Setting Up
Document PN 29010074 V4.1 - 99 -
Heading Rate Stabilizer
Note: if you have a Heading Rate Stabilizer, you only need to compensate it. You
do not need to compensate the Fluxgate Compass attached to it (and in fact,
trying to do so will cause an error).
If you do not have an HRS, do the Fluxgate Compass procedure instead of this.
1) With the autopilot powered off, loosen the white plastic screw on the top of the Heading
Rate Stabilizer
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, by approximately 3 turns (don’t remove it all the way, though).
2) Power up the autopilot, in the Dockside Setup menu.
3) Move the highlight to the “Compass Setup” line, and press the
F
F
n
n button.
4) Highlight “Analog Compass”, make sure the parameter is correctly set to “HRS”, and
press the Fn button.
5) You will see a “Reading Compass” screen, and then a “Turn Boat at 3°/s” screen.
• If “ComNav HRS Found” appears instead, the HRS has not entered its test mode.
Power off, back the HRS screw out another turn & re-try.
6) Manually steer the boat in a circle.
You will typically need to do a bit more than 2 full circles.
7) After enough circles, the screen should change to say “Compensation OK”
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.
Press the
P
P
O
O
R
R
T
T button, to end the HRS testing procedure and go back to the Compass
Configuration menu.
• If the “Compensation OK” screen does not appear after you have done more than 3
full circles, or if the screen shows “HRS Compensation Failed”, shut off the autopilot,
check all wiring, then repeat this procedure from step 2).
• If that does not work, you should repeat the procedure, but try to turn the boat in a
bigger, steadier circle.
• If that does not work, you may also have to relocate the compass and/or HRS.
• If you continue to encounter difficulties, please contact your ComNav Dealer for
assistance.
• To repeat the HRS compensation, you must power the system off & then back on
again (in Dockside Setup). If you try to repeat compensation without a power cycle,
you will see “ComNav HRS Found” appear on the screen, followed by “HRS
Compensation Failed”. If this occurs, press the
P
P
O
O
R
R
T
T button to abort the invalid HRS
compensation attempt.
8) Screw the plastic screw on the top of the HRS all the way in again. Be careful not to
over-tighten it.
The HRS is now compensated. It and the Fluxgate Compass attached to it are ready for use
(although the combination may still need to be calibrated).
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Backing out the screw toggles an internal “mode” switch, which it turn causes the HRS, the next time it is powered up,
to perform some internal tests. In these tests, it adjusts certain of its operating parameters to the specific electrical
characteristics of the Fluxgate Compass which it is connected to, and for Hard-Iron deviation errors. During testing, the
HRS is outputting an “invalid” Sine/Cosine signal pair to the SPU … both signals are at 2.5 Volts.
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The HRS has completed its tests, and is now outputting “valid” Sine/Cosine signals – derived from the Fluxgate’s
Sine/Cosine signals, but compensated for the vessel’s rate of turn – to the SPU.