Fuel capacitance systems are separated into two broad groupings, AC capacitance and DC capacitance. The source of these names derives from the type of signal processed by the fuel system amplifier. Barfield designs a universal tester for each type of system with the proper interface harnesses to access individual aircraft applications. Some of the various test and measurements include:

• Insulation - Testing the wiring and probes
• Fuel Tank Capacitance Measurement
• Individual Probe Capacitance Measurement
• Capacitance Simulation - Indicators and amplifiers
• Indicators - Bench testing of remote units

Contrary to popular belief, there is no "black magic" in troubleshooting and calibrating fuel capacitance systems, but only if you have the right equipment!