Fuel Management Systems

Signal Conditioners

Several models, using both analog and digital circuitry, are available to interface engine-mounted flowmeters to cockpit rate indicators and totalizers. PC600 and PC800 series units support legacy systems, while the PC910/PC920 systems are designed to upgrade existing systems, and to provide an accurate link to new Flight Management Systems.

Features:

• Direct replacement for current legacy systems
• Interfaces with newer flight management systems with current instrumentation
• Established product history

Specifications:

The PC910 (single) / PC920 (dual) series of signal conditioners conform to the requirements of FAA document TSO-C44b.

Flow Sensor input:	Input full scale frequency range: 1600 Hz Max
Input:	Input Type: Balanced Input Impedance: 20K ohms Input Sensitivity: 7 millivolts RMS at frequencies < 100 Hz
Temperature:	Temperature Sensor Type: RTD, Nickel 270 Alloy
Sensor Input:	Temperature Sensor Resistance @ 25°C:1000 ohms +/- 1% Temperature Coefficient: 6 ohms per °C Temperature Range: -67°C to 158°F (-55° to 70°C)
Totalizer Output:	Output type: Solid-State switch to ground Current sink: 400 mA maximum Totalizer supply source: +28 vdc fuse protected Pulse width: 50 ms Rise/fall time: < 25/us Output frequency: dependant on scaling, 10 Hz maximum Accuracy: +/- 3% of indicated total with fuel at nominal density, variations in fuel density from nominal will affect accuracy
Indicator Rate Output:	Accuracy: +/- 3% of full scale flow rate with fuel of nominal density Fuel density variations from nominal will affect accuracy Linearity: +/- 1% of full scale Output Impedance: > 400K ohms
Auxiliary Analog Output:	Type: Voltage output signal proportional to flow rate Full Scale Voltage: 5.000 or 5.333 vdc Slew rate: < 0.5 s from zero to full scale Accuracy: +/- 2.0% of full scale Repeatability: +/- 0.1% of full scale Linearity: +/- 0.2% of full scale Temperature Drift: +/- 0.01% of full scale per °F (+/- .02% of full scale per °C) Output Impedance: < 1K ohms
Power Requirements:	Voltage: +10 to 32 vdc Current: Each channel 75mA typical 100mA maximum, excluding totalizer current
Temperature Range:	-22° to +122°F -30° to +50°C
Mating Connectors:	J1 - MS3116F14-15S J2 - MS116F14-15SX