Appendix G: Sensor Debug Data
SkyView HDX System Installation Manual - Revision E 29-7
Similarly, as Pin 14, 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 engine back to the tank), the RAW value should
be incrementing. If the RAW value is not incrementing, no pulses are being received from
the fuel flow sensor.
Note that pulses received on Pin 14 are used to SUBTRACT from fuel flow monitored by
Pin 14; pulses received on Pin 19 are subtracted from pulses received on Pin 14. For
example, if 100 pulses are received on Pin 14, and 50 pulses are received on Pin 19, the
net number of pulses used by the SkyView fuel computer to display actual fuel flow will
use 50 “net” pulses.
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).
RPM Left – Pins C37 P32/34
Pin C37 Pin 32 and C37 Pin 34 are different signal levels to the RPM Left Input.
Pin 32 is used for standard (attenuated) signal (typically received from a magneto or other
“high level” RPM output) for the RPM Left Input.
Pin 34 is used for low-voltage RPM signal (typically received from an Electronic Control
Unit [ECU]).
RPM Right – Pins C37 P33/35
Pin C37 Pin 33 and C37 Pin 35 are different signal levels to the RPM Right Input.
Pin 33 is used for standard (attenuated) signal (typically received from a magneto or other
“high level” RPM output) for the RPM Right Input.
Pin 35 is used for low-voltage RPM signal (typically received from an Electronic Control
Unit [ECU]).
RPM Left – Pins C37 P32/34 and RPM Right – Pins C37 P33/35
Pin C37 P32/34 and Pin C37 P33/35 display an incrementing number in "RAW". Similar
to what’s shown in the figure above for Pin 14, the displayed RAW value is displayed as
a hexadecimal number (Base 16), and increments by 1 for each pulse. Similar to the
hexadecimal value shown for Pin 14, succeeding RPM pulses would change this value to
5AE, then 5AF, then 5B0, etc.
Thermocouples
Thermocouples (CHTs, EGTs) display as voltage in millivolts. .0084 is 84 millivolts, and
which converts to 383 degrees F in a J type thermocouple.
Vref+ is an internal calibration voltage. If it's not near 5.00V in CAL(V) something in the
voltage regulator circuitry is not operating correctly and will likely not read correctly.
Vdiff: Value should be near 100. This only affects thermocouples.
To Next Page
Loading...
