Dynon Avionics FlightDEK-D180 Installation Guide - Manual (Page 125)

Appendix
FlightDEK-D180 Installation Guide 9-9
CALIBRATION AND ADJUSTMENT
Before calibration or 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 FlightDEK-D180 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 FlightDEK-D180 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 FlightDEK-D180 and EDC-D10A have mismatched versions of firmware
on them. This most commonly happens when one takes the FlightDEK-D180 out of the aircraft
to connect to a computer for firmware upgrade. Ensure that the FlightDEK-D180 and EDC-
D10A are connected to each other and communicating before attempting a firmware upgrade.
Additionally, ensure that you have set up only one of the two types of OAT probes that can be
used with the FlightDEK-D180. If you have this 3 wire OAT connected, none of your EMS GP
inputs should be set to OAT. Conversely, if you have the 2 wire EMS OAT connected directly to
the 37 pin connector, the EFIS OAT should be set to “NONE”.