EGT Is Celsius On Spreadsheets

[Dynon101]

My Dynon is setup to show CHT/ EGT/ TIT in degrees F on the screen however when I download the User Data to a spreadsheet the temperatures show up as C.

The problem that I have is that when doing a GAMI LOP sweep the graduations of C is not as fine of a measurement as F so when looking at the spreadsheet I see the EGT digits increasing as the fuel flow is decreasing however the EGT will level off at 973 C at 18.7 GPH and just stay there at 973 C as the engine is leaned to 18.3 GPH and that does not produce useful data.

I am sure that if the system was recording in F then there would be a number of digits to look at as the fuel is leaned and I can more accurately see where the peak is.

If I try to add decimal places on the spreadsheet only yields 973.00 C for that spread of data so it is not like the spreadsheet was rounding the data.

Is there a way to get the Dynon to record in F?

 

[porterjames]

Sorry for responding without doing any research, but could it be that is the upper limit of the reporting scale for the EGT's?
That is really high isn't it?
The same problem exists when using Savvy Analysis but there is a way to have C converted to F. That probably won't help you though.

 

[Dynon101]

On Savvy I selected in the aircraft setup to convert C to F...and that is a new question. I always thought that when I did that I would read the real EGT in F however if Dynon is only recording the EGT in C without any decimal places (973.58 C) then the data I am reading on the Savvy charts is a conversion from the 973 C to F

 

[swatson999]

According to the manual, EGT values are 0 to 999 in degrees C.

 

[Dynon101]

>According to the manual, EGT values are 0 to 999 in degrees C.

So Dynon just records in whole degrees C (973.0 C).

Sadly when doing a GAMI lean of peak sweep then uploading it to SAVVY the graduation of C is not fine enough. When my lines on the chart peak if I zoom in (highlight the section) and the zoomed in chart appears the lean of peak "peak" of the chart is very flat making it hard to really identify when the temp peaked.

We do however have the ability to read the scale of F on the SkyView screen and the numbers seem to move up and down in normal F increments and are not choppy (in other words they do not seem to show up on the screen as whole number degrees C converted to degrees F).

How have other been doing the GAMI LOP sweeps?

It is almost like I should run a video camera and watch the playback to see the EGT numbers as displayed on the screen instead of relying on the C converted to F on the Savvy screen.

 

[RV6-KPTW]

I use the exported data. Celsius is adequately accurate for LOP measurements.

 

[Carl_Froehlich]

I also just use the exported data onto an Excell spreadsheet. I suggest the data is far more susceptible to accuracy of data collection than temperature units of measure.

Note - by editing the spreadsheet to the data run periods, and triming down to a few columns of interest like EGT, Fuel Flow, MP, altitude and such you can get each PEAK event capured on one or two screens. Using graph functions to look for peaks is not accurate.

Do three good runs at perhaps 6500’ and get a rough cut. This will drive the first injector replacements (I tend to always find the rich cylinders and select smaller injectors for those). For me I find three nozzle replacement iterations to be adequate to get the GAMI spread to 0.0 or 0.1 GPH. For the last two iterations more runs are needed to get a better data average to filter out data taking variences, and at different altiudes of interest.

Carl

 

[Dynon101]

Thanks for the advice