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

Universal AC/DC test set for measuring and simulating capacitive fuel, water, LOX and engine oil quantity systems, with contaminated probe detection.

Capacitance measurement modes: AC, DC, OEM DC
Range: 0.000 pF – 39,999 pF
Accuracy: Greater of ±0.1% of reading or ±0.05 pF
Resolution, 0.000 – 39.999 pF: 0.001 pF

Datasheet

Overview

The VIAVI PSD90-3 is a universal test set for AC and DC capacitive fuel, water, liquid oxygen (LOX) and engine oil quantity systems. It measures capacitance, DC voltage, insulation resistance and Distance to Fault (DTF), and simulates capacitance for indicator testing.

Used with an aircraft-specific interface, the PSD90-3 tests and troubleshoots fuel quantity indicating systems (FQIS), isolates fuel system faults, calibrates fuel quantity indicators and detects contaminated fuel probes. It runs from its rechargeable battery for flight line testing or from external power for bench testing.

Contaminated Probe Testing

The test set has two methods, Auto and Manual, for detecting and isolating fuel probes contaminated by particulates, water, microbial growth or other sources. During normal capacitance measurements, automatic detection shows a Degree of Error indication on the display and lights a Contaminated Fuel Probe Detected LED on the front panel. If contamination is indicated, the probe can be tested manually with the Check Probe function, using a user-selectable Percent of Error limit that lights the LED when exceeded.

Aircraft Specific Interface

Each aircraft platform needs its own interface to access the FQIS. How complex the fuel system is determines what the interface must do to allow complete testing of the fuel quantity system.

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 of 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
Auto and manual ranging
Fully remote controllable via RS-232
Backlit display
CE certified
Meets safety requirements of Boeing 10-61959 specification
DTF function displayed in capacitance

Specifications

Capacitance Measurement

Capacitance measurement modes	AC, DC, OEM DC
Range	0.000 pF – 39,999 pF
Accuracy	Greater of ±0.1% of reading or ±0.05 pF
Resolution, 0.000 – 39.999 pF	0.001 pF Manual Range only
Resolution, 0.00 – 399.99 pF	0.01 pF
Resolution, 400.0 – 3,999.9 pF	0.1 pF
Resolution, 4,000 – 39,999 pF	1 pF AC and DC only; the range text in the extracted datasheet is garbled

Capacitance Simulation

Accuracy	Greater of ±0.2% of reading or ±0.1 pF From 300 Hz to 10,000 Hz
TU simulation range / resolution	0.00 – 399.99 pF / 0.01 pF
TU simulation range / resolution	400.0 – 3,999.9 pF / 0.1 pF AC or DC
TU simulation range / resolution	400.0 – 1,999.9 pF / 0.1 pF OEM DC
TU simulation range / resolution	4,000 - 11,500 pF / 1 pF AC or DC
COMP (AC) simulation range / resolution	0.00 – 399.99 pF / 0.01 pF
COMP (AC) simulation range / resolution	400.0 – 1,150 pF / 0.1 pF
AUX simulation range / resolution	0.00 – 399.99 pF / 0.01 pF
AUX simulation range / resolution	400.0 – 3,999.9 pF / 0.1 pF AC or DC
AUX simulation range / resolution	400.0 – 1,999.9 pF / 0.1 pF OEM DC
AUX simulation range / resolution	4,000 - 11,500 pF / 1 pF AC or DC

Resistance Measurement

Accuracy	Greater of ±2% of reading or 0.05 Ω
Accuracy, manual ranges and Extended Meg range	±5% of reading
Resolution, 0.000 – 39.999 Ω	0.001 Ω AC and DC only
Resolution, 0.000 – 399.99 Ω	0.01 Ω
Resolution, 400.0 – 3,999.9 Ω	0.1 Ω
Resolution, 4.000 K – 39.999 K	0.001 K
Resolution, 40.00 K – 399.99 K	0.01 K
Resolution, 400.0 K – 3,999.9 K	0.1 K
Resolution, 4.000 M – 39.999 M	0.001 M
Resolution, 40.00 M – 399.99 M	0.01 M
Resolution, 400.0 M – 3,999.9 M	0.1 M
Resolution, 4,000 M – 19,999 M	1 M
Resolution, 0.0000 nS – 3.9999 nS	0.0001 nS Manual Range only

DTF (Distance to Fault) Measurement

Range	0 pF – 39,999 pF
Accuracy	±0.1% of reading ±1 pF
Resolution	1 pF – 1 range

Voltage Measurement

Range	-33.999 V – +33.999 VDC
Accuracy	Greater of ±0.2% of reading or ±2 mV
Resolution	0.001 V – 1 range
Impedance	1.0 MΩ

Environmental

Operating temperature	-40°C to +55°C
Storage temperature	-51°C to +71°C

Power Requirements

Battery	1 Rechargeable 12 V Lead Acid Gel Cell
Operation	12 hours minimum from -10°C to +50°C Lower operation time beyond these temperatures
Charge time	8 hours max from fully discharged battery
Charge input	100 – 240 VAC from 45 – 60 Hz; 100 – 130 VAC from 380 – 440 Hz
Charge temperature	-20°C to +50°C Charger will operate unit beyond these temperatures but will not charge battery

Physical Characteristics

Height	10.6” (26.9 cm)
Width	14” (35.6 cm)
Depth	6.5” (16.5 cm)
Weight	13 lbs (5.9 kg)

Test Set Certifications

Altitude, operating	MIL-PRF-28800F, Class 2
Altitude, not operating	MIL-PRF-28800F, Class 2
Bench handling	MIL-PRF-28800F, Class 2
Blowing dust	MIL-STD-810F, Method 510.4, Procedure I
Drip proof	MIL-PRF-28800F, Class 2
Explosive atmosphere	MIL-STD-810F, Method 510.4, Procedure I As printed in the datasheet
Relative humidity	MIL-PRF-28800F, Class 2
Shock, functional	MIL-PRF-28800F, Class 2
Vibration limits	MIL-PRF-28800F, Class 2
Temp, operating	MIL-PRF-28800F, Class 2
Temp, not operating	MIL-PRF-28800F, Class 2
Transit-drop	MIL-PRF-28800F, Class 2
Safety compliance	UL-61010B-1, EN-61010-1, CSA 22.2 No 61010-1
EMC	EN-61326