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Introduction
1. Description
1.1 Introduction
There are two versions of this Air Data Test System (ADTS), a 19", 6U high (10½") rack-
mounted unit (ADTS 405R Mk2) and a flight-line unit (ADTS 405F Mk2).
The ADTS 405R Mk2 is a rack-mounted system and, with external pressure and vacuum
supplies connected, provides measurement and control of pitot and static systems and
components. The unit can be used for leak checks, calibration accuracy checks and functional
tests of air data instruments, components and systems.
The ADTS 405F Mk2 is a self-contained flight-line air data test system providing complete
pitot and static measurement and control. The unit can be used for on-aircraft sense and leak
testing, calibration accuracy checks and functional tests of air data instruments, components
and systems. The ADTS 405F Mk2 comprises an controller-rack and pump-rack enclosed in a
high density, polyethylene case.
The ADTS 405 Mk2 displays and operates in either units of pressure measurement or
aeronautical units. In the control mode, the rate that the pressures change towards new set-
points can be controlled in true aeronautical rate units.
There are two independent pneumatic channels connect to the aircraft or instrument
systems, one for static and one for pitot. They can be operated as measure only channels
with leak testing facility or each can be control channels producing true pressure conditions
for altitude and airspeed.
To protect sensitive instruments and equipment a "ground" facility automatically and safely
controls both channels to atmospheric pressure at the previously entered rates of change
and then informs the operator when both channels are safely at "ground".
The operator interface is either a hand terminal connected to the front panel or the key pad
and display on the front panel. Both provide information and control selections for the user
through the keys and display. The keypad has a back-light for improved operation in poor light
conditions. The unit can also be controlled remotely using the IEEE 488 communications
interface. The front panel contains the operate switch and a mimic panel with LED indicators
showing the operation of the solenoid-operated pneumatic valves.
The pump-rack, on the ADTS 405F Mk2, produces pressure and vacuum supplies for the
controller-rack and for external services. Located on the front panel, the external connectors
provide for external pressure and vacuum supplies (EXT PRESSURE and EXT VACUUM) and an
auxiliary static (vacuum) output (AUX). The rack is cooled by a fan located under a protective
cover on the front panel. The power supply connection for the ADTS 405F Mk2 is located on
the front panel.
1.2 Operating Range and Performance
The ADTS 405 Mk2 is supplied in one of two full-scale ranges (850 or 1000 kts) for
measurement and control of the pitot pressure channel.
© 2017 General Electric Company – All Rights Reserved.
ADTS 405 R/F Mk2 Instruction Manual-English | 1
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