Error Messages:
“COM” - If communication is lost with the EDC, after 2 seconds all functions requiring signals from the
EDC will display “COM” for its value.
“A2D” - If the EDC sends an error message for a specific channel, the function associated with that
channel (on the MVP) will display “A-D” for the value.
“
OVR” - If a channel on the EDC is over ranged (>2.5 volts differential), an “OVR” will be displayed for
that function.
“
REF” - If the reference for any function has a problem or a derived value used to calculate the function has
a problem, the display for the function will show “REF.”
“FPR” - If a capacitance fuel probe is unplugged, or water touches the center electrode, the digital value
for the fuel level will displayed “FPR.”
EDC-33P and EDC-33T-XX
(S Version)
Weight: 1.0 Lb
Environmental: Designed and Tested to TSO (DO-160E)
Software: Designed and Documented to TSO (DO-178B, Level C)
Power Requirements: 7.5 to 50 Volts, 0.1 amps (Typ).
Accuracy all Functions: <= 1% (Unless otherwise noted)
Input Configuration:
EDC-33P: 1-Volt Channel, 1-Amp Channel, 1-Fuel Flow Channel, 6-Pressure Channels,
17-Temp Channels, 4-Resistive Fuel Level Channels, 4-Capacitive Fuel Level Channels and 2-RPM Channels.
EDC-33T-XX: 1-Volt Channel, 1-Amp Channel, 1-Fuel Flow Channel, 9-Pressure Channels, 13-Temp Channels,
4-Resistive Fuel Level Channels or 4-Capacitive Fuel Level Channels and 2-RPM Channels.
Note: Temp, Fuel Level and Pressure channels can be used to monitor other functions or
annunciators.
Volts:
Measured on pin 35 of the EDC Top Connector.
Input Resistance: 83.8K Ohms.
Range: 0 to 40 volts.
Sensitivity: 6400 counts per volt.
Note: A VI-221 or FM-VA-MVP-xx may be used to measure Voltage on any temperature
channel. 67
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