PSD90-3 Fuel Quantity Test Set

Universal AC/DC Fuel Quantity Test Set

PSD90-3 Universal AC/DC Fuel Quantity Test Set
PSD90-3 Universal AC/DC Fuel Quantity Test Set
PSD90-3 Universal AC/DC Fuel Quantity Test Set

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.

PSD90-3 Fuel Quantity Test Set

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.

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
  • 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.

PSD90-3 Software Options*

  • AC Software Option
  • DC Software Option
  • OEM DC Software Option

* Software options must be installed at our factory or by an authorized VIAVI service center.

PSD90-3 Test Set Versions

  • 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

PSD90-3 Standard Accessories

  • Universal Charger 
  • Operations Manual 
  • F-16 Interface Adapter Cable (F-16 Test Set 22165794 only)
  • Connector BNCF Rev. Polarity
  • Connector BNCM Rev. Polarity (qty 2)
  • Ground Cable

PSD90-3 Optional Accessories

  • PTS-3 Calibration Standard
  • PSD30-2AF Interface Adapter
  • Maintenance Manual


Avionics Maintenance and Repair Care Plans

VIAVI offers warranty and Avionics Maintenance and Repair Care Plans that include hardware and labor costs for repair, and annual certified calibrations performed at the factory during the duration of the service contract.

Avionics Maintenance and Repair Care Plan

Repair and Calibration

Our products live in rugged environments for over 10 years with 1000s of test connect/disconnect cycles.  We will be there to support you to ensure components that require maintenance like connectors, batteries, and software updates to ensure you are ready to test accurately for years to come. We apply factory procedures that use fast, automated calibration and functional verification, maintenance using OEM parts and the application of all engineering change orders and software updates. Services are available through contract Care plans, FleetCare or per incident as requests. 

Top 4 Reasons to Choose VIAVI for Your Repair and Calibration Needs:

  • Minimize business disruption
  • Budget
  • Measurement Accuracy and Product Reliability
  • Measurement Compliance, TL9000 certification and OEM Standards

Explore More

Care Support Plan - PSD90-3

Care Support Plan - PSD90-3

ProductRecommended Plan (Part Number)BronzeCare
Why calibrate?

Why calibrate this product?
What are the common issues?

Why Calibrate the product? AVX


VIAVI Solutions performs a product performance check certifying the test equipment is performing within published specifications and updates the instruments internal calibration.  The calibration ensures accuracy and proper function of the instrument including required retrofits/repairs and firmware/software updates.

VIAVI Solutions conforms to one or more of the standards listed below as applicable to their product, location, and customer requirements. In keeping with this policy, the metrology and calibration processes provide an unbroken line of traceability to nationally and / or internationally recognized standards.

  • ISO 9001 Quality Management Systems - Requirements
  • ANSI/NCSL Z540-1 Calibration Laboratories Measuring and Test Equipment.

In addition, aviation ground support equipment (ramp or back shop), is required by the various aviation authorities around the world (including the FAA) to be maintained in accordance with the manufacturer recommendations, including calibration traceable to national standards.

What are the common issues? AVX


Tests performed with out of calibration test sets can return to service devices which are not performing to regulated specifications.

What are the most common implications of these issues to the business?

  • Inaccurate results: Calibration cycles greater than recommended may not yield accurate measurements
  • Inaccurate measurements resulting from uncalibrated tools may violate industry standards and violate regulatory body requirements
  • Tests found to be performed by an out of calibration test set can result in containment actions and unplanned rework
  • Devices calibrated on uncalibrated test sets may function improperly, cause interference issues violating government regulatory requirements, and/or damage other equipment


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