DESCRIPTION:

The VIAVI PSD90-3 Fuel Quantity Test Set is a portable universal AC/DC avionics test platform developed for testing, troubleshooting, calibration, and validation of aircraft fuel quantity indicating systems and capacitance-based fuel measurement systems.

Designed for flight line maintenance, depot repair operations, aircraft manufacturing environments, and avionics troubleshooting applications, the PSD90-3 supports comprehensive testing of AC and DC capacitive fuel systems, water systems, liquid oxygen (LOX) systems, and engine oil quantity systems across a broad range of commercial and military aircraft platforms.

The platform is engineered for:

• fuel quantity system troubleshooting
• fuel probe diagnostics
• capacitance measurement and simulation
• contaminated fuel probe detection
• aircraft fuel system calibration
• return-to-service validation
• avionics maintenance
• electrical fault isolation
• fuel system verification

The PSD90-3 incorporates automatic and manual contaminated fuel probe detection capability designed to identify fuel probe contamination caused by particulates, water ingress, microbial growth, and other fuel system contaminants that may result in incorrect fuel level indication.

During standard capacitance measurements, the system automatically monitors for contaminated probe conditions and provides visual warning indications through onboard error analysis and front-panel contamination alerts. Manual probe validation functions allow technicians to isolate and verify suspected contaminated probes using configurable error thresholds.

The platform supports operation on internal rechargeable battery power for flight line deployment or external AC power for bench maintenance environments. Its intrinsically safe design and portable ruggedised construction make it suitable for both hangar and operational ramp environments.

The PSD90-3 replaces several legacy VIAVI and Aeroflex fuel quantity test platforms including:

• PSD30-2AF
• PSD60-2R
• PSD60-1AF
• PSD90-1C

The system supports aircraft-specific interface adapters for access to individual aircraft FQIS architectures and is compatible with a wide range of fixed-wing and rotary aircraft platforms.

Technical Specifications

Supported System Types

• AC capacitive fuel systems
• DC capacitive fuel systems
• Water quantity systems
• LOX systems
• Engine oil quantity systems

Measurement Functions

• Capacitance measurement
• Capacitance simulation
• Insulation resistance testing
• Distance-to-Fault (DTF) measurement
• DC voltage measurement
• Fuel probe contamination detection

Capacitance Measurement Range

• 0.00 pF to 39.99 KpF

Resistance Measurement Capability

• Up to 19990 M

Diagnostic Functions

• Automatic contaminated probe detection
• Manual probe troubleshooting
• Low Voltage / Low Current diagnostic mode
• Corroded connection isolation
• Fault distance analysis
• Intermittent fault detection

Fuel Probe Detection Features

• Automatic contamination analysis
• Degree of error indication
• Manual CHECK PROBE functionality
• Front-panel contamination alert indication

User Interface

• Integrated digital display
• Front-panel operational controls
• Automated self-test on power-up
• Closed-box calibration functionality

Power

• Rechargeable internal battery
• External AC operation support

Platform Construction

• Portable ruggedised design
• Intrinsically safe architecture
• Flight line deployable configuration

Platform Configuration Options

Software Configurations

Available software capability configurations include:

• AC software option
• DC software option
• OEM DC software option

Test Set Variants

Available operational configurations include:

• PSD90-3 AC/DC Fuel Quantity Test Set
• PSD90-3AC Fuel Quantity Test Set
• PSD90-3DC Fuel Quantity Test Set
• PSD90-3-F16 Fuel Quantity Test Set

Aircraft Interface Configurations

The PSD90-3 supports aircraft-specific interface adapters for:

• commercial aircraft platforms
• military aircraft platforms
• rotary aircraft systems
• fixed-wing fuel quantity systems

Aircraft interface capability depends on the individual aircraft fuel quantity system architecture.

Standard Accessories

Typical supplied accessories include:

• Universal charger
• Ground cable
• Operational documentation
• Reverse polarity BNC connectors
• Aircraft interface accessories

Optional Accessories

Available optional accessories include:

• Aircraft interface adapter kits
• Calibration standards
• Maintenance documentation
• Transit and carrying cases
• Additional interface accessories

Key Features

• Universal AC/DC fuel quantity test platform
• Aircraft fuel quantity system diagnostics
• Automatic contaminated fuel probe detection
• Capacitance measurement and simulation
• Distance-to-Fault analysis capability
• Low Voltage / Low Current diagnostic mode
• Corroded connection isolation
• Intrinsically safe architecture
• Rechargeable battery operation
• Flight line and bench deployment capability
• Closed-box calibration functionality
• Fuel probe troubleshooting support
• Aircraft-specific interface compatibility
• Commercial and military aircraft support
• Portable ruggedised maintenance platform