VIAVI - PSD90-3 Fuel Quantity Test Set
- • Safe and precise measurement and simulation
- • Contaminated Probe Detection
- • Low Voltage / Low Current Mode - Isolates corroded connections.
- • Distance-to-Fault Measurement
- • Self-test on power up
- • Closed box calibration
The PSD90-3 will test any AC or DC capacitive fuel, water, liquid oxygen (LOX), or engine oil system.
When combined with an aircraft specific interface, the PSD90-3 allows the user to test, troubleshoot and isolate fuel system issues, calibrate fuel quantity indicators, and detect contaminated fuel probes.
Developed for use in all environments the PSD90-3 is ideal for flight line testing on battery power or bench testing on external power.
Contaminated Probe Testing
The PSD90-3 provides users with two methods; Auto and Manual, for detecting and isolating contaminated fuel probes caused by particulates, water, microbial growth, or other sources of contamination.
During normal capacitance measurements, the contaminated fuel probe detection function will automatically alert the user via a Degree of Error indication on the display and with a Contaminated Fuel Probe Detected LED on the front panel.
Once there is an indication of possible probe contamination, the user can manually test using the Check Probe function with a user-selectable Percent of Error limit which will illuminate the Contaminated Fuel Probe LED indicator if exceeded.
Aircraft Specific Interface
Each aircraft platform requires a unique interface to access the FQIS. The complexity of the fuel system determines the capability of the interface to allow for complete testing of the fuel quantity system. Contact VIAVI for the proper interface for your aircraft.
Key Features
- • Measurement of capacitance, DC voltage, insulation resistance, and Distance to Fault (DTF)
- • Simulation of capacitance for indicator testing
- • Automatic contaminated fuel probe detection while performing normal capacitance tests
- • Manual troubleshooting of contaminated fuel probes using the CHECK PROBE function
- • Low Voltage/Low Current Mode allows isolation of intermittent or corroded connections
- • Megger and capacitance manual ranging modes assist in finding intermittent faults
- • REV DC (DC+) Mode measures capacitance from the DC+ side of the tank unit for complete testing DC capacitive fuel systems
- • Compatible with existing aircraft fuel quantity system interfaces
- • Closed box calibration using front panel controls • Self-test on power-up
- • Rechargeable battery or externally powered
- • Intrinsically safe design
- • Optional OEM DC option emulates PSD30-2AF OEM DC operation and DC capacitive measurement values.
More Product Information

- • ADS-B equipment installation verification
- • Complete AC 20-165B fast and convenient reporting to identify installation issues
- • STC support
- • Eliminate post STC operational flights
- • Coupled testing in the hangar or on the flight line, eliminates:
- • Open sky requirements
- • GPS repeater
- • Weather issues
- • Interference with ATC operations
- • Saves time and money

All features from the existing IFF-45TS will be carried over, including:
- • Mode 5 testing without actual cryptographic applique and keys using integral mode 5 emulator
- • Supports DoD AIMS 04-900A Option A - KIV-78 and QRTK6 NG (with Airbus DS QRTK6 NG adapter) and Option B - KIV-77 and SIT-2010 crypto appliqués, KIV-79
- • Separate connections for direct or over-the-air testing
- • Test ranges of up to 3 km with appropriate antennas
- • ADS-B Out
- • Over-the-air platform testing of MK XIIA equipment including Mode 5, ADS-B beacons and TACAN interrogators

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NEO 941 parts are AS5836 compatible (Clam Shell Clamps not Included)
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NEO 942 parts are AS1653 compatible (Clam Shell Clamps not Included)

- • Solid-state circuits and LCD backlit display for low power consumption and high reliability
- • Battery-powered for complete portability and ease of maintenance
- • Lightweight aluminum case has hinged compartment in lid for test lead storage
- • Small size permits testing in restricted spaces
- • Push-button "extended range" switch permits readings up to 9,999 pf or 10,000 megohms - over-range indication on LCD
- • Tested and approved for use in any function with fuel in tanks; battery power eliminates need for voltage (safety) checks

- • Compatible with AD 98-20-40 & AD 99-03-04 compliant aircraft (Mod 6 and above)
- • Modular design for high reliability and low maintenance
- • Closed box calibration using front panel controls - performed annually
- • Battery powered with percent of charge displayed
- • Maintenance codes displayed to aid in troubleshooting
- • Distance-to-Fault (DTF) Mode determines the "length" of the wire or the approximate distance to a break in the wire or shield
- • Large selection of aircraft specific interface cables readily available

- • Software-driven design allows for field updates for adding new features, capability or modifications due to industry changes
- • ADS-B Target Generator
- • ADS-B squitter encode/decode
- • DO-260, DO-260A and DO-260B data parsing
- • DO-260B canned tests available (option)
- • Generates ATCRBS/Mode S interrogations Multi-receiver test capability (option)
- • UAT TX/RX capability (optional)
- • Pulse and frequency measurement
- • 10.4 inch touch screen LCD display for operator control of all test set capabilities
- • Remote controlled via GPIB or Ethernet
- • Two independent transmitters and receivers
- • TX/RX data logging capability
- • Full diversity testing capability
- • Data parsing in engineering units

- • Legacy command set compatibility offered for the following products: NAV-2000R, ATN-7300 and the Collins 479S-6A
- • Ethernet remote control interface offered on the ATB-7300NG
- • VHF Generator - Provides control of modulation frequency, modulation depth (up to 3 sources), SELCAL tones, frequency and tone sequences.
- • ILS/Localizer Generator - Provides control of 90 Hz and 150 Hz tone frequencies, modulation depths, left/right DDM and IDENT settings, including Morse code.
- • ILS Glide Slope Generator - Provides control of 90 Hz and 150 Hz tone frequencies, modulation depths, up/down DDM
- • VOR Generator - Provides control of 30 Hz Var/Ref and 9960 Hz tone frequencies, modulation depths, 9960 Hz deviation, VOR bearing, to/from and IDENT settings
- • ADF Generator - Provides control of modulation frequency, modulation depth and IDENT settings
- • Marker/Beacon Generator - Provides selection of Outer, Middle and Inner marker beacon tones and control of tone frequencies, modulation depth and IDENT settings
- • Basic Graphical User Interface (GUI) allows access to test features

VIAVI supports many rotary and fixed-wing aircraft platforms with an extensive library of aircraft specific interface cables and units. Combined with a VIAVI Fuel Quantity Test Set, the test solution provides complete functional testing and troubleshooting of the fuel quantity system.
- • PSD 737-2 FQIS - This interface measures the capacitance of the individual probes and compensator or total tank capacitance and also tests densitometers.
- • PSD 767-2 FQIS - This interface is a Honeywell FQIS at FQPU interface unit.

VIAVI supports many rotary and fixed-wing aircraft platforms with an extensive library of aircraft specific interface cables and units. Combined with a VIAVI Fuel Quantity Test Set, the test solution provides complete functional testing and troubleshooting of the fuel quantity system. If you are unable to find your aircraft listed here, we also offer design services for the development of new interfaces and aircraft test procedures.
Available through your GSA Supplier

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