SkyView Technical Support FAQ

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Revision as of 10:56, 5 December 2011 by Admin (talk | contribs) (Added Engine Sensor Accuracy and Grounding)
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Thanks for reading - work in progress.

I just got my new SkyView system. I figured how to hook up the power and ground wires, but when I connect up the SV-ADAHRS-200 with the provided cable, all I see is three big Red X's. Help!

A SkyView Display, as shipped from the factory, is set to display MAP (30%), PFD (30%), and EMS (20%).

To do a SkyView Network Configuration (recognizes the devices connected to the SkyView display), push Buttons 7+9 to access the SETUP Menu, then SYSTEM SETUP > NETWORK SETUP > CONFIGURE > DETECT (button).

  • The EMS screen will disappear (SV-EMS-220 not detected on SkyView Network)
  • The MAP will continue to display the red X until a GPS is connected to the SkyView display.
  • The Primary Flight Display (PFD) screen will display.

The SkyView Network Configuration procedure must be performed any time the network configuration is changed - devices added, or removed.

I'm having trouble with my (various) sensor - it's just not reading what I expect it to.

By far, the most common issue with sensors installation, and sensors displaying correct values, is grounding issues, especially with one-wire sensors that depend on the engine block for return ground. We recently added this excellent explanation about grounding, written by a Dynon engineer, to the SkyView System Installation Guide.

Engine Sensor Accuracy and Grounding

It is vitally important that all engine sensors, your Dynon SkyView display, your SV-EMS-220 module, and electrical system all share the same ground, and that there is virtually no measurable voltage between these grounds.

Large currents flow between your alternator and the rest of your aircraft. The ground for these currents is shared with your sensors. Because of the large currents involved, resistance in grounds that cannot be seen with a simple multimeter can still lead to significant voltage offsets. This can lead to errors in sensor readings.

These large currents exist in other places in the aircraft as well, such as between the battery ground cable and its connection to the airframe, and along the grounding points for the avionics bus. It is important that all of these ground paths be appropriately sized for the loads involved, and that the connections be clean, solid, and devoid of contamination.

In particular, be sure to connect a ground wire between your engine block or avionics ground block and any of the SV-EMS-220’s ground pins.

Please note that running a ground wire from the EMS to the engine block may not entirely solve grounding issue, as this adds just a small wire in parallel with another much larger wire, and the load will get transferred to this smaller wire, which itself is resistive due to its small size, and thus no real effect will be seen.

Though dealing with grounding issues can be time consuming and frustrating, errors that are seen on your Dynon Engine Monitor are caused by points in the aircraft where there isinsufficient grounding. This can lead to weak starting, hot wires, and corrosion. Fixing the Engine Monitor readings by having a good ground will also lead to a healthier aircraft electrical system overall.

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Tech Support FAQ #5

Answer #5