New engine EMS problems

[10ixwwybk2]

I ran the O320 engine in my, RV9a equipped with twin Skyviews, for the first time today.

I am not very Avionics savy and would appreciate some advice on the following issues

The Lycoming instructions say switch off immediately if the oil pressure does not rise, I found. that the power drain of the starter causes the Dynons to re-boot, it is then over a minute before you can see your any output from your EMS.
I went ahead and when the screen re-booted it showed a good oil pressure numericaly, but the digital scale had a red cross on it and was not working. I checked the 'sensor setup' and it seems to be correctly formulated in the same manner as the other displays.

I also had a some other problems.

The carb heat said it was not connected. I will check the curcuit. I assume it is a variable resistor to ground, can anyone tell me the resistance range of the sensor.

I did not have a voltmeter reading. There was a simple solution, I did not connect the red wire, pin 1. It was not mentioned, as far as I could see, in the instructions. Can I connect this to any +ve source.

Many thanks
Robin

 

[jakej]

a) Carb heat - page 7-48 (latest install manual) covers installation of the sensor however if you are using the Westach 299 sensor then here is some info from another poster ---

This data is from Westach thermistor temp sensors that have two wires each, which I need for proper grounding of the sensors as they get mounted to several different items like radiator, gearbox, engine block etc. I ground them all to the same location. The data below is from Westach. The column on the left is temperature in F, the column on the right is Ohms of resistance.

0      49500
-10      35500
0      25500
10      18700
20      13800
30      9800
40      7840
50      5970
60      4600
70      3570
80      2780
90      2190
100      1750
110      1400
120      1130
130      915
140      745
150      615
160      507
170      422
180      348
190      296
200      251
210      210
220      178
250      113
300      57
400      16

b) Red wire pin 1 can go to any +ve source

Rebooting of EMS screen can be prevented by adding the optional SV-BAT-320.

HTH

Jake J

 

[Dynon]

A red X usually means that a sensor is "railed out" (not connected), or way out of range. What was the numerical number that you were seeing? Also, what are the end points and ranges that are set under the sensor setup?

 

[Dynon]

The voltmeter inputs can read any DC voltage source, essentially. You'll need to make sure that you set up the pin, sensor, and page appropriately too before it will show up on the display.

 

[10ixwwybk2]

Thanks for the carb heat sensor resistance infomation Jake I should be able to fault find that one.
However you say the standby battery should stop the Skyview re-booting. I do have the SV320 and it still re-boots on start up, it is working becuase the unit stays on for 30 secs when you shut down. My inspector has an issue with this as he really wants to see oil pressure on start up not 1+ minutes later. I would appreciate a comment from Dynon on this one.
Regarding the red cross on the oil pressure display, the numerical pressure shown was accurate at around 60psi. The sensor is configured as per the download for the engine and is in the right range,
Thanks,
Robint

 

[Dynon]

Short answer - it shouldn't do that. To be clear - are you saying that when you shut master off, you get the countdown, but when you crank, it reboots? What version of software are you running?

 

[dynonsupport]

Also, is this a 12V or 28V plane?

 

[10ixwwybk2]

Yes, it is as you say, when the master is turned off I get the count down but when cranking the engine it re-boots.
I am running version 5.1.
It is a 12v system.
I have a D700 and a D1000. I have a back up battery on the D1000 only and this is the one I have the EMS displayed on for start.
Robint

 

[dynonsupport]

The test you need to run is to turn off the switch or breaker for SkyView and let it run on battery. Then start the engine. Does it still reboot?

If it does, you have something really strange in the wiring somewhere. If it doesn't, then there is still something funny up. Knowing which way it goes will help us figure it out.