Appendix G: Sensor Debug Data
29-6 SkyView HDX System Installation Manual - Revision E
o Px refers to an individual pin on the 37-pin or the 25-pin connector.
o Px/x refers to a pair of pins used for thermocouples (CHT/EGTs) on the 37-
pin or the 25-pin connector.
• NAME – The name selected in SENSOR INPUT MAPPING for this sensor /
input / pin.
• SENSOR ID – The type of sensor selected in SENSOR INPUT MAPPING for
this sensor / input / pin.
• RAW – Raw number from the Analog to Digital converter; Dynon Avionics
internal use only.
• CAL(V) – The exact voltage that is present on this pin. The output of many
sensors is converted to a voltage in the SV-EMS-220 for processing. For
example, Dynon Avionics temperature sensors are thermistors, which vary their
resistance with changing temperature, and are converted to a voltage
internally, before resulting in a display of temperature in ° Fahrenheit or °
Celsius.
• VALUE – Output of the (selected) sensor in (converted) units (such as
pressure, temperature, etc.) corrected for the measurement unit selected
(temperature in ° Fahrenheit, etc.). This is the same number that is displayed
in the widget on the EMS page.
o “NAN” is “Not A Number”; the input being received on this pin is invalid for
this particular sensor. This is normal when the input is not configured, or the
sensor is not connected or defective.
Specialized Function Pins
Pin 14
Primary fuel flow sensor, monitoring fuel flow from the tank to the engine. The RAW value
will increment for every pulse received from the fuel flow sensor in the current boot cycle
(reset when the SkyView display is powered off).
In the figure above, the displayed RAW value is shown as “5AD” (not 00000000). This
value is displayed as a hexadecimal number (Base 16), and increments by 1 for each
pulse. Succeeding pulses would change this value to 5AE, then 5AF, then 5B0, etc.
If the engine is on (fuel is flowing from the fuel tank to the engine), the RAW value should
be incrementing. If the RAW value is not incrementing, no pulses are being received from
the fuel flow sensor.
CAL(V) and VALUE both show the fuel flow rate, corrected for the “K-factor” selected in
FUEL FLOW CALIBRATION (pulses per unit per hour) and the unit selected (Gallons or
Liters).
Pin 19
Return fuel flow sensor, monitoring fuel flow from the engine back to the tank. The RAW
value will increment for every pulse received from the fuel flow sensor in the current boot
cycle (reset when the SkyView display is powered off).
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