Dynon Avionics EFIS-D100 Installation Guide - Manual (Page 77)

Appendix
EFIS-D100 Installation Guide 7-9
CALIBRATION AND ADJUSTMENT
Before adjustment, it is possible for the OAT sensor to read as much as 5 degrees Celsius off the
actual value. Therefore, it may be necessary to adjust the displayed air temperature value to
compensate for this. To make this adjustment, you must enter the menu system and press the
following sequence of buttons: MORE > SETUP > MORE > OAT. This will display the OAT
adjustment menu. Press INC or DEC to increase or decrease the currently displayed OAT value.
It is important to make this adjustment when the air surrounding the OAT probe is at a known
temperature. This can be achieved with a standard thermometer. Adjust the displayed OAT until
it agrees with your independent temperature reference.
TROUBLESHOOTING
OAT value fluctuates wildly
If the OAT probe is improperly wired, the EFIS-D100 will not receive a valid signal from it.
Verify that the three wires coming from the OAT probe are wired exactly as described in the
Wiring Instructions section above.
OAT value is consistently high/low
You need to adjust the displayed OAT value to correct for sensor inaccuracies. Follow the
instructions in the Calibration and Adjustment section above.
OAT display area states OAT NOT FOUND
Ensure that you have selected the number corresponding to your OAT in the OAT INSTALLED
menu as described above. It can sometimes take as long as 5 seconds for the EFIS-D100 to lock
onto the OAT reading. Ensure that all wiring is correct and that there are no shorted or open
connections.
Other strange behavior by OAT reading
It is possible that your EFIS-D100 and EDC-D10A have mismatched versions of firmware on
them. This most commonly happens when one takes the EFIS-D100 out of the aircraft to connect
to a computer for firmware upgrade. Ensure that the EFIS-D100 and EDC-D10A are connected
to each other and communicating before attempting a firmware upgrade.