Barfield 101-00423 Fuel Adapter Cable for Select Cessna Aircraft

The Barfield 101-00423 Fuel Adapter Cable is designed to connect specific Cessna aircraft fuel quantity systems to compatible Barfield fuel quantity test sets, enabling accurate calibration and maintenance. It provides a secure and reliable electrical connection between the test set and the aircraft’s fuel probes and indicators, ensuring consistent readings during system verification and troubleshooting.

The 101-00423 Fuel Adapter Cable is designed for use with Barfield DFQ40K, AC2K, 2548H, and 8000 Fuel Quantity Test Sets. These instruments are industry-standard tools for verifying and calibrating aircraft fuel quantity systems. The cable provides precise connectivity, allowing for accurate capacitance readings and calibration verification between the aircraft’s sensors and the test equipment.

Yes. For certain Cessna aircraft configurations, the 101-00423 serves as a required base adapter when using additional cables, such as the 101-00560 (indicator side) and 101-00561 (aircraft side) cables. These cables rely on the 101-00423 as the primary interface between the aircraft and the test set, ensuring complete circuit integrity during fuel quantity system testing.

The system adapter cable connects the test set to the aircraft’s overall fuel quantity system, while the probe adapter cable links directly to individual tank probes for more detailed testing. The 101-00423 serves as the main system adapter for several Cessna aircraft and is often paired with complementary probe cables, such as the 101-00424, to provide full system coverage.

By providing a shielded and calibrated electrical pathway, the 101-00423 adapter cable minimizes resistance, noise, and signal distortion between the test set and aircraft circuits. This precision ensures more consistent capacitance readings during system calibration, improving overall accuracy and reliability in fuel quantity measurement.

No. The 101-00423 adapter cable is specifically configured for select Cessna models and their associated connector types. Each Barfield adapter cable is tailored to unique aircraft wiring interfaces, ensuring that pin assignments and impedance match the manufacturer’s fuel quantity system specifications.

The cable should be visually inspected before each use for signs of wear, damage to the connectors, or continuity issues. Barfield recommends conducting periodic continuity checks and verifying insulation resistance to ensure reliable performance. Cables used frequently in maintenance environments should be inspected more often to prevent test inaccuracies caused by degraded connectors or damaged shielding.

The cable itself does not require calibration since it functions as a passive electrical connection. However, it must be verified as part of the fuel quantity test set’s overall calibration procedure to ensure that its electrical integrity meets Barfield standards. This verification is typically performed during the annual calibration cycle of the test set.

The adapter cable connects to the aircraft’s system interface plug on one end and to the fuel quantity test set output port on the other. Once connected, technicians use the test set to measure probe capacitance and simulate fuel tank conditions, ensuring the readings match the aircraft’s specifications. Clear labeling and keyed connectors help prevent misconnection during setup.

Before connecting or disconnecting the cable, technicians must ensure that the aircraft's electrical system is de-energized and that fuel circuits are properly grounded. Using the cable near open fuel tanks requires strict adherence to safety procedures to avoid ignition hazards. Proper storage in a protective case also helps maintain connector integrity and prevent contamination.