GE Druck ADTS 405 Bedienungsanleitung

Druck ADTS 405/405F

Air Data Test Systems

Service Manual K0171

Sensing & Inspection Technologies

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Druck ADTS 405 Service Manual

K171 Issue No. 1 Page i

TABLE OF CONTENTS

Preliminary pages

Table of contents (this table)

Introduction

Purpose

Scope

Glossary

Abbreviations

Chapter

1 DESCRIPTION

2 DISMANTLING

3 ASSEMBLING

4 TESTING

5 CALIBRATION

6 ILLUSTRATED PARTS LIST

Druck ADTS 405 Service Manual

K171 Issue No. 1 Page ii

Associated Druck Documents:

K114 - ADTS 405 User Manual

INTRODUCTION

Purpose

This technical manual provides servicing instructions and a parts list to an intermediate level of

maintenance for the Druck ADTS 405 series of air data test systems.

Scope

This technical manual contains a constructional description, a functional description explaining the

theory of operation, dismantling, assembling and testing procedures. The test equipment and special

tools required for the recommended maintenance level are listed.

Druck ADTS 405 Service Manual

K171 Issue No. 1 Page iii

GLOSSARY

Terminology

The terminology used in this manual is specific and individual interpretation must not be

introduced. The terms are defined as follows:

Adjust:

To bring to a more satisfactory state; to manipulate controls, levers, linkages, etc. to return

equipment from an out-of-tolerance condition to an in-tolerance condition.

Align:

To bring into line; to line up; to bring into precise adjustment, correct relative position or

coincidence.

Assemble:

To fit and secure together the several parts of; to make or form by combining parts.

Calibrate:

To determine accuracy, deviation or variation by special measurement or by comparison with a

standard.

Check:

Make a comparison of a measure of time, pressure, temperature, resistance, dimension or other

quality with a known figure for that measurement.

Disconnect:

To detach the connection between; to separate keyed or matched equipment parts.

Dismantle:

To take apart to the level of the next smaller unit or down to all removable parts.

Ensure:

To confirm that a proper condition exists; to find out with certainty.

Examine:

To perform a critical visual observation or check for specific conditions; to test the condition of.

Fit:

Correctly attach one item to another.

Inspect:

Review the work carried out by Specialists to ensure it has been performed satisfactorily.

Install:

To perform operations necessary to properly fit an equipment unit into the next larger assembly

or system.

Maintain:

To hold or keep in any particular state or condition especially in a state of efficiency or validity.

Operate:

Ensure that an item or system functions correctly as far as possible without the use of test

equipment or reference to measurement.

Readjust:

To adjust again; to move back to a specified condition; to bring back to an in-tolerance condition.

Reconnect:

To rejoin or refasten that which has been separated.

Refit:

Fit an item which has previously been removed.

Druck ADTS 405 Service Manual

K171 Issue No. 1 Page iv

Terminology (continued)

Remove:

To perform operations necessary to take an equipment unit out of the next larger assembly or

system. To take off or eliminate. To take or move away.

Repair:

To restore damaged, worn out or malfunctioning equipment to a serviceable, usable or operable

condition.

Replace:

Remove an item and fit a new or a serviced item.

Reset:

To put back into a desired position, adjustment or condition.

Service:

To perform such operations as cleaning, lubricating and replenishing to prepare for use.

Test:

Ascertain by using the appropriate test equipment that a component or system functions

correctly.

Druck ADTS 405 Service Manual

K171 Issue No. 1 Page v

Abbreviations

The following abbreviations are used in this manual; the abbreviations are the same in the singular

and plural.

A Ampere

abs Absolute

a.c. Alternating current

ALT Altitude

CAS Calibrated airspeed

d.c. Direct current

e.g. For example

EOC End of conversion

EPR Engine pressure ratio

EPROM Electrically programmable read only memory

etc. And so on

Fig. Figure

ft Foot

g Gauge

Hg Mercury

Hz Hertz

IAS Indicated airspeed

i.e. That is

IEEE 488 Institute of Electrical and Electronic Engineers standard 488 data

in Inch

kg Kilogram

LED Light emitting diode

(M) Magnesium alloy

m Metre

mA Milliampere

max Maximum

mbar Millibar

min Minute or minimum

mm Millimetre

mV Millivolts

No. Number

N.m. Newton metre

Para. Paragraph

Ps Static pressure

psi Pounds per square inch

Pt Total pressure

Qc Differential pressure Ps/Pt

QFE Local atmospheric pressure

QNH Barometric pressure at sea level

ROC Rate of climb

SCPI Standard commands for programmable instruments

TAS True airspeed

TE Test equipment

V Volts

Vc Calibrated velocity

Vt True velocity

+ve Positive

-ve Negative

°C Degrees Celsius

Druck ADTS 405 Service Manual

K171 Issue No. 1 Page vi

Druck ADTS 405 Service Manual

K171 Issue No. 1 Page 1-1

Chapter 1

Description

CONTENTS

Para.

Introduction.........................................................................................1

SPECIFICATION

DESCRIPTION

ADTS 405 and Electronics Rack (ADTS 405F) .......................5

Pitot and Static Controllers ..........................................................11

Operation ................................................................................14

Pressure output ....................................................................19

Soft start ..................................................................................21

Control computer and communications ...............................22

ARINC 429 Interface (special order) .........................................23

Altimeter Encoder Interface (special order)..........................24

IEEE 488 Interface (option E) .... 25

Pump Rack...........................................................................................26

Hand terminal ....................................................................................31

Illustrations

fig.

ADTS 405 General view .................................................................1-1

ADTS 405F General view ...............................................................1-2

ADTS 405 ..............................................................................................1-3

ADTS 405F Racks ..............................................................................1-4

ADTS 405 and Electronics Rack Internal view.....................1-5

Controller PCB Schematic.............................................................1-6

Ps Manifold Schematic...................................................................1-7

Pt Manifold Schematic ...................................................................1-8

Supervisor Computer and Communications .......................1-9

Pump Rack...........................................................................................1-10

Hand terminal ....................................................................................1-11

Druck ADTS 405 Service Manual

K171 Issue No. 1 Page 1-2

INTRODUCTION

1. 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 sense and leak testing and functional tests of air

data instruments, components and systems. The ADTS 405F is a self-contained air data test system

providing complete pressure and vacuum measuring and control for on-aircraft sense and leak testing

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.

2. The user interface for the rack-mounted version is a front panel keyboard and display with a

hand terminal as an option. For the ADTS 405F version the hand terminal is the supplied user interface

with the front panel keypad and display as an option. The ADTS 405 can also be controlled by a

computer (PC) using the front or rear panel IEEE 488 communications interface. The front panel

contains the operate switch and the mimic panel with LED indicators showing the operation of the two

pneumatic channels.

3. The pump rack, on the ADTS 405F, produces pressure and vacuum supplies for the electronics

rack and for external connectors. 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 auxiliary static output provides vacuum for suction-type static adaptors.

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.

4. The ADTS 405 can display and operate in either units of pressure measurement or aeronautical

units. The rate that the pressure changes to a new set-point can be set. The rate is then reduced as

the set-point is achieved and maintained, without overshoot. A `ground' facility automatically and

safely controls both channels to atmospheric pressure at the previously entered rates of change and

then informs the user when both channels are safely at `ground'.

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