GE Druck ADTS 405 - 1 DESCRIPTION; 1.1 Introduction

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K114 Issue No. 9
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1 DESCRIPTION
1.1 Introduction
 There are two versions of the ADTS 405, a 19", 6U high (10½”) rack-mounted unit and a
flight line unit.
 The ADTS 405 is a rack-mounted system and, with external pressure and vacuum supplies
connected, provides measurement and control for leak checks, calibration accuracy
checks and functional tests of air data instruments, components and systems.
 The ADTS 405F is a self-contained flight-line air data test system providing complete
pressure and vacuum measuring and control for on-aircraft sense and leak testing,
calibration accuracy checks and functional tests of air data instruments, components and
systems. The unit comprises an electronics rack and pump rack enclosed in a high density,
polyethylene case.
 The ADTS 405 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 an ATEX certified 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 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, produces pressure and vacuum supplies for the
electronics 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 is located on the front panel.