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Matt Dralle
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Joined: 08 Nov 2005
Posts: 25704
Location: Livermore CA USA
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 Posted: Sat Feb 07, 2009 8:42 pm Post subject: GRT AHRS Pitch & Roll Calibration... |
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How do I adjust the pitch and roll calibration of the AHRS on the Grand Rapids EFIS HX AHRS? I go into the AHRS Maintenance page and find the Pitch and Roll numbers for AHRS 1 and for AHRS 2, but when I select "Change", but none of the numbers are adjustable. I mounted my dual AHRS as level as I possibly could, but there's no way a mere mortal such as myself could possible get it perfect. Surely you are allowed to dial in the pitch and roll attitudes........?
Thanks for the help!
Matt Dralle
RV-8 #82880 / N998RV (res)
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skylor4(at)yahoo.com
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| Posted: Mon Feb 09, 2009 8:32 pm Post subject: GRT AHRS Pitch & Roll Calibration... |
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Matt,
On the Settings Menu/Primary Flight Display there is a "Pitch Ladder Offset" that can be adjusted to +- 15 degrees.
There is no adjustment for roll. GRT states that the AHRS and magnetometer must be installed level in roll, and I believe this is critical for stability. If your mounting shelf isn't perfect, use shims between the mounting flange and your mounting bracket to get it level. You'll also want to make sure that your mounting brackets won't flex under "G" and vibrate from engine vibrations.
Skylor
RV-8 Under Construction
Finishing...
--- On Sat, 2/7/09, Matt Dralle <dralle(at)matronics.com> wrote:
[quote]From: Matt Dralle <dralle(at)matronics.com>
Subject: GRT AHRS Pitch [quote][b]
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Matt Dralle
Site Admin
Joined: 08 Nov 2005
Posts: 25704
Location: Livermore CA USA
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| Posted: Wed Feb 11, 2009 10:42 am Post subject: Re: GRT AHRS Pitch & Roll Calibration... |
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Thanks for the feedback. I also heard back from GRT tech support and they said that anything under .5 degrees is fine. I'm right around .2 degrees in both pitch and roll, so I guess that's close enough.
Matt
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| Description: |
| Pitch and Roll at .2 Degrees |
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Matt Dralle
Site Admin
Joined: 08 Nov 2005
Posts: 25704
Location: Livermore CA USA
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| Posted: Wed Feb 11, 2009 10:46 am Post subject: Re: GRT AHRS Pitch & Roll Calibration... |
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Here's one more shot to prove it looks alright at .2degrees... 
Matt
| | - The Matronics RV8-List Email Forum - | | | Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:
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| Description: |
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111.27 KB |
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3988 Time(s) |
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