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EDM 830 install

Retz

By Retz
in Avionics/Panel Discussion

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carusoam Grand Master

carusoam

Posted
Posted (edited)

The 90's factory installed location is out on the wing on the underside. It is a small bump.  So small it is a challenge to remember exactly where it is.  If you fly in IMC it is helpful to have the high precision and accuracy afforded by the digital JPI display, with the sensor located in the factory position.

Advantage: Away from engine heat and out of the sunshine.

Disadvantage: Long wire runs.

Please note: I am a PP, not a mechanic.

Best regards,

-a-

Edited by carusoam
Houman Mentor

Houman

Posted
Posted

Ours is in the same place as teejayevans and daver328

Bob

I have it the same place as Carusoam, under the wing. I would have tought the position in the vent would get a good amound of prop air in it, wondering if that would influence the data ?

Houman Mentor

Houman

Posted
Posted

I have mine under the 3rd access panel I belive, on the left side, I think pretty much aligned with the stall tab.

 

ArtVandelay Grand Master

ArtVandelay

Posted
Posted
I have it the same place as Carusoam, under the wing. I would have tought the position in the vent would get a good amound of prop air in it, wondering if that would influence the data ?

Most of the hot air passes underneath the plane, my original wing mount seems to match my 830 vent mount, or at least as close as I can tell from little analog temperature gauge.

PTK Grand Master

PTK

Posted
Posted (edited)

I have it the same place as Carusoam, under the wing. I would have tought the position in the vent would get a good amound of prop air in it, wondering if that would influence the data ?

I think the point is to have the probe be bathed by and sample the temperature of the outside air. As long as it's not sampling exhaust air, i.e. underneath the plane, it's fine.

 

Edited by PTK
Marauder Grand Master

Marauder

Posted
Posted
I think the point is to have the probe be bathed by and sample the temperature of the outside air. As long as it's not sampling exhaust air, i.e. underneath the plane, it's fine.

 

Being a redundant kind of guy I have multiple OAT indicators on my plane. The first being the factory unit, analog that now sits on the side window. The second is the JPI's sensor that is installed in the pilot side air intake and the third is the Aspen's which is resident in the RSM on the fuselage, just aft of the baggage door.

Having watched all 3, I found the Aspen is always a few degrees warmer than the JPI reading and the factor unit usually agrees closely with the JPI.

In this photo the Aspen is showing 57° F and the JPI at 54°.

31da8b02a9dd6afcdbfcc00678247890.jpg

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PTK Grand Master

PTK

Posted
Posted (edited)

This made me think of something else.

I have in the airplane a few instruments that provide voltage info: The JPI, the M655 and the stormscope has a battery monitor. 

All seem to be different! 

Is this normal?!

Chris, how do you draw pretty red circles in pics?!!

Edited by PTK
Bob_Belville Grand Master

Bob_Belville

Posted
Posted

There's a parameter adjust for either the Aspen or JPI or both. I think I change the JPI after comparing all 3 in the hanger. Then I removed the one in the pilot window and plugged the hole with silicone caulk. Picked up 3-4 kts. 

Marauder Grand Master

Marauder

Posted
Posted
This made me think of something else.

I have in the airplane a few instruments that provide voltage info: The JPI, the M655 and the stormscope has a battery monitor. 

All seem to be different! 

Is this normal?!

Chris, how do you draw pretty red circles in pics?!!

iPad app called photo editor by Axiem Systems.

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Marauder Grand Master

Marauder

Posted
Posted
I'm surprised the Aspen doesn't convert to °F when it knows where it is flying. 

Best regards,

-a-

Going from F to C is user selectable. I keep it at C to make it easier match for icing math. ️

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Marauder Grand Master

Marauder

Posted
Posted

I'm surprised that JPI can't send my GTN650 the OAT, it sends it the fuel stats. How big is the Aspen probe temp probe anyway?

The JPI probe is big:

dfacb546f3a70655e21c00903a3c95fb.jpg

The probe for the Aspen is part of the antennae.

7dacc535fd9f9d5d46819ad7f702457e.jpg

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PTK Grand Master

PTK

Posted
Posted

 

 

I'm surprised that JPI can't send my GTN650 the OAT, it sends it the fuel stats. How big is the Aspen probe temp probe anyway?

The JPI probe is big:

dfacb546f3a70655e21c00903a3c95fb.jpg

 

Exactly how mine is!

KSMooniac Grand Master

KSMooniac

Posted
Posted

The best spot is under the wing, just outboard of the gear in an inspection panel.  That is where the factory put them in the J+ models and for good reason.  Out of the sun, out of the exhaust, and out of the engine heat streams.  It is also out of the way of getting bumped easily.  Running the wire takes less than an hour if you already have an interior panel out.  I put a Davtron probe on my left wing many years ago, and just added a JPI probe under my right wing at the original factory OAT location.  

It is worth doing it properly, especially if you fly in IMC where you'd really like to know if it is 31 degrees or 33 degrees!

  • Like 1
Marauder Grand Master

Marauder

Posted
Posted
Antenna? For what? Aspen talks to you GTN-650, yes?

The Aspens have their own GPS antenna for emergency backup purposes. If you lose the GTN, the flight plan is stored in the Aspen and the Aspen reverts to an emergency GPS mode which is supplied by the Aspen.

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ArtVandelay Grand Master

ArtVandelay

Posted
Posted

The Aspens have their own GPS antenna for emergency backup purposes. If you lose the GTN, the flight plan is stored in the Aspen and the Aspen reverts to an emergency GPS mode which is supplied by the Aspen.

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I thought that was only for MFD version, does just PFD have this as well? I may not fully understand the Aspen offerings.

Sorry for the thread shift....

Marauder Grand Master

Marauder

Posted
Posted
I thought that was only for MFD version, does just PFD have this as well? I may not fully understand the Aspen offerings.

Sorry for the thread shift....

The PFD comes standard with the backup GPS. The MFD shares the GPS with the PFD but you can also buy the updated backup for the MFD.

I tried it a couple of times in flight by shutting off the GTN. An error popped and I got the emergency RSM GPS message.

6dfc5b74d73ef2a6f84645f0d578051e.jpg

c516a56d5f7ef87d30dfe1b58aa6b4a3.jpg

Features like these are why I picked the Aspen over the G500.

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