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World-Class Engineered Solutions
for Aerospace Systems

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{cf45cea113033368483d38fb286aa921cdb0f50c649cb191fdaaa2ffe38c25ab}
  • Temperature Coefficient: 6 ohms per °C
  • Temperature Range: -67°C to 158°F
  • (-55° to 70°C)

Totalizer Input:

  • 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{cf45cea113033368483d38fb286aa921cdb0f50c649cb191fdaaa2ffe38c25ab} of indicated total with fuel at nominal density, variations in fuel density from nominal will affect accuracy

Indicator Rate Output:

  • Accuracy: +/- 3{cf45cea113033368483d38fb286aa921cdb0f50c649cb191fdaaa2ffe38c25ab} of full scale flow rate with fuel of nominal density
  • Fuel density variations from nominal will affect accuracy
  • Linearity: +/- 1{cf45cea113033368483d38fb286aa921cdb0f50c649cb191fdaaa2ffe38c25ab} 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{cf45cea113033368483d38fb286aa921cdb0f50c649cb191fdaaa2ffe38c25ab} of full scale
  • Repeatability: +/- 0.1{cf45cea113033368483d38fb286aa921cdb0f50c649cb191fdaaa2ffe38c25ab} of full scale
  • Linearity: +/- 0.2{cf45cea113033368483d38fb286aa921cdb0f50c649cb191fdaaa2ffe38c25ab} of full scale
  • Temperature Drift: +/- 0.01{cf45cea113033368483d38fb286aa921cdb0f50c649cb191fdaaa2ffe38c25ab} of full scale per °F (+/- .02{cf45cea113033368483d38fb286aa921cdb0f50c649cb191fdaaa2ffe38c25ab} 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

Send us your contact information and a brief description of your project, and we will respond right away.

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