IFR Aeroflex PSD90-1C Universal AC/DC Fuel Capacitance Test Set

The IFR Aeroflex PSD90-1C Universal AC/DC Fuel Capacitance Test Set is a portable, field-capable instrument for testing and calibrating aircraft fuel quantity indication systems. It measures and simulates capacitance across five distinct ranges - from 0.001 pF to 39.99 kpF - with measurement accuracy of ±0.1% of reading or 0.05 pF, and simulation accuracy of ±0.3% of reading or 0.3 pF across 300 Hz to 9,600 Hz. The instrument supports Tank Unit, Compensator, and Auxiliary simulation modes, operates on rechargeable battery or external power, and measures DC voltage via manual or auto-ranging input.

Dimensioned at 10.6" × 14" × 6.5" and weighing 13 lbs, it delivers rugged portability suitable for shop, depot, and field-level troubleshooting. MIL-STD-810 Method 511.4 certified and NIST-traceable, it operates from −40 °C to +55 °C across altitudes to 15,000 ft.

Technical Specifications

• Capacitance Measurement: 0.000 pF to 39.99 kpF with five ranges: Extra Low (0–19.999 pF, 0.001 pF resolution), Low (0–199.99 pF, 0.01 pF), Medium (200–1,999.9 pF, 0.1 pF), High (2,000–19,999 pF, 1 pF), Extended (20–39.99 kpF, 10 pF); Accuracy ±0.1% of reading or 0.05 pF


• Capacitance Simulation: Tank Unit 0–11,990 pF; Compensator 0–1,190 pF; Auxiliary 10–11,990 pF; Accuracy ±0.3% of reading or 0.3 pF from 300 Hz to 9,600 Hz


• Resistance Measurement: ±2% of reading or 0.1 Ω; High Extended and Mhos ranges ±20%


• DC Voltage: Manual or auto-ranging measurement


• Temperature Operating Range: −40 °C to +55 °C; Storage −51 °C to +71 °C


• Humidity: 90% max non-condensing (0–28 °C); 80% max to 31 °C, linear decay to 50% at 40 °C


• Altitude: 15,000 ft (4,600 m) maximum


• Dimensions/Weight: 10.6" × 14" × 6.5" (26.9 × 35.6 × 16.5 cm); 13 lbs

Key Features

• Rechargeable battery operation with 110V/230V charger


• Self-test on power-up; battery capacity display


• Annual calibration interval


• Tests AC or DC capacitive fuel, water, LOX, engine oil, and related systems

Compatibility & Integration

• Boeing Spec 10-61959 Rev H compliant


• NIST-traceable calibration


• Aircraft-specific interface cables sold separately


• F-16 fleet version (ITAR-controlled) and universal non-F16 variants available