Aircraft External Refuel Preselect Panel

Overview

Liquid Measurement Systems (LMS) provides fuel gauging and interface controls for service, maintenance, and flight crew personnel, at the primary refuel point on the aircraft.

External Refuel Preselect Panels can display the quantity of fuel in each tank, calculate the total quantity of fuel onboard, allow service teams to pre-select desired fuel quantity, and display fault codes. LMS’ external refuel preselect panels are compact, lightweight, and rugged systems that can be adapted to a variety of platforms.

Enclosure

• Material: Nickel plated aluminum
• Dimensions: 5.06″ x 5.37″ x 3.36″
• Weight 1.20 pounds maximum
• Mil-STD-38999, shell size 13, 22 pins, environmentally sealed

Features

• Receives fuel quantities from two separate ARINC 429 buses
• Certified to FAA TSO C55A
• Software DO-178
• Environmental DO-160
• Capable of driving shutoff valves open and closed to enable automatic refueling

Functions

• Start/Off toggle switch
• Increment/decrement toggle switch used to preselect the desired total fuel quantity

Operational Temp. Range

• -55° C to +75° C

Input

• Up to Five (5) Open/28VDC discrete inputs
• One (1) Open/GND discrete input
• ARINC 429 or customer specific requirement

Outputs

• Up to Two (2) Discrete Open/GND
• Displays several tank quantities and calculates the total quantity
• Displays preselected fuel quantity
• Displays fault codes

Power Requirements

• 28VDC
• Current Draw: < 150mA
• Maximum Power Consumption: 4W