Electronics International CGR-30P - Manual (Page 49)

Fuel Flow: Input Trigger: 2.5 Volt with over voltage protection. Input Configuration: 5.11K Ohm pull-up to +5
Volts. Operating Range: 0 to 8.3 KHz. Sensitivity: One count per pulse measured over a 0.356 second period.
Notes:
* +10 Volts are provided from the EDC to energize the flow transducer.
* An FFDM-1-MVP module may be used to accommodate fuel return from
a pressure carburetor.
* An FM-Flow-P module may be used to measure flow from a pulsed injector.
RPM: Two RPM channels are available. May be configured for digital or mag pickup. Also, may be set up to
operate from one or two inputs. Selectable jumpers and different EDC models accommodate 2, 4, 6, 8, etc.
cylinder engines. Inputs are over voltage protected. Mag Out feature provided.
Input Trigger: +3V / -1V
Input Resistance: 2.06K with 1 volt pull up.
Max RPM (EDC-33P-4/6): 4500, see Appendix for information on high RPM EDC units.
Sensitivity (EDC-33P-4/6): 20 counts per RPM
Notes: A 79K isolation resistor (supplied in the kit) must be put in series with the input when measuring
signal from mags.
Pressure:
Input: 0 to 2.5 Volts Differential
Input Impedance: > 20M Ohms
Common Mode Range on the Input: + 4 Volts to -.2 Volts (from ground).
+5 Volt and Ground provided to energize the pressure transducer.
Sensitivity: Ratiometric to the EDC +5 Volt supply (9.537uV x (5/(voltage of the EDC +5V supply)))
Notes: Many pressure transducers are available to monitor many different functions. See an E.I. price sheet for a
list of pressure transducers available.
Temperature:
Input Range: 0 to 2.5 Volts Differential
Input Impedance: 12.1K Ohms on each input to ground
Sensitivity: 9.537uV per count.
Notes:
* Any Temp Channel may be used to measure any thermocouple probe or any device outputting a voltage.
In this way many different types of functions may be monitored through a temperature channel. See an
E.I. price sheet for a list of modules available.
* A Reference junction is provided to accommodate TC probes. Temp channel 8 is closest to the “Ref
Diode” and is best used for measuring OAT.
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