GE Druck ADTS 405 R/F Mk2 Instruction Manual Download Page 19

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Introduction

ADTS 405 Mk2 Instruction Manual-English | 1

1. DESCRIPTION

1.1 Introduction

There are two versions of this Air Data Test System, a 19", 6U high (10½”) rack-mounted unit (ADTS
405R) and a flight line unit (ADTS 405F).
The ADTS 405R 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 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 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 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 IEEE488 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.

1.2 Operating Range and Performance

The ADTS 405 is supplied in one of two full-scale ranges (850 knots or 1000 knots) for
measurement and control of the pitot pressure channel.
Operating limits are set, pre-defined tabular limits known as STANDARD, CIVIL and MAX these can
be selected through the SETUP menu (see Reference section 6). Operators may also configure the
display to aeronautical or pressure units but should be aware that when units of pressure are
selected, wider full-scale pressure limits will be enabled for some parameters.