GE Druck ADTS 405 User Manual

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Page 1

Druck ADTS 405

Air Data Test Systems

User Manual K114

Sensing

DRUCKADTS 405 ATEXCOMPLIANT

HANDTERMINAL

DONOT DISCONNECT WHEN

ENERGIZEDIN THE HAZARDOUS AREA

1013. 25 mbar

Aim

1013. 25<

3199. 91 mbar

Aim

3200. 00

405

ATE

LIA

Page 2

Page 3

K114 Issue No. 9

405

ATE

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INA

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IZED

Ps 1013. 25 mbar Aim 1013. 25< Pt 3199. 91 mbar Aim 3200. 00

Druck ADTS 405

Air Data Test Systems

User Manual

K114

NOT

DISCONNECTW

HEN

ENERGIZED

THE

HAZARDOUS

AREA

RUCKADTS

405

ATEX

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K114 Issue No. 9

Page 5

K114 Issue No. 9

Introduction

This technical manual provides operating instructions for the Air Data Test System compatible with the requirements of first line servicing.

Scope

This technical manual contains a brief description, operation and testing procedures for the user of this equipment.

Safety

 The manufacturer has designed this equipment to be safe when operated using the

procedures detailed in this manual. Do not use this equipment for any other purpose than that stated.

 This publication contains operating and safety instructions that must be followed to

make sure of safe operation and to maintain the equipment in a safe condition. The safety instructions are either warnings or cautions issued to protect the user and the equipment from injury or damage.

 Use qualified* technicians and good engineering practice for all procedures in this

publication.

Pressure

 Do not apply pressure greater the maximum safe working pressure to the equipment.

Toxic Materials

 There are no known toxic materials used in this equipment.

Maintenance

 The equipment must be maintained using the manufacturer’s procedures and should

be carried out by authorised service agents or the manufacturer’s service departments.

Technical Advice

 For technical advice contact the manufacturer or subsidiary.

* A qualified technician must have the necessary technical knowledge, documentation,

special test equipment and tools to carry out the required work on this equipment.

Druck ADTS 405 User Manual

This product meets the essential protection requirements of the relevant EEC directives. Further details of applied standards may be found in the product specification.

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K114 Issue No. 9

Associated Publications

This lists the Druck manuals and publications referenced in this manual.

Maintenance Manual K244

Air Data Test System ADTS 405

Calibration Manual K199

Air Data Test System ADTS 405

IEEE 488 OPT 2 Manual K154

Air Data Test System ADTS 405

SCPI IEEE 488 Manual K157

Air Data Test System ADTS 405

User Manual K170

Altimeter Encoder Option

User Manual K185

ARINC 429 Option

User Manual K220

Line Switching Unit LSU 100/101

User Manual K222

Line Switching Unit LSU 200

Operating and Communications Manual K223

Line Switching Unit LSU Series

TPM Programming and Communications Manual K230

Test Program Manager Version 4 for Windows

TPM User Manual K250

Test Program Manager Version 4 for Windows

Symbols

This symbol, on the instrument, indicates that the user should refer to the user manual.

This symbol, on the instrument, indicates do not throw-away in domestic bin, hazardous material, dispose correctly in accordance with local regulations.

This symbol, on the instrument, indicates d.c.

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K114 Issue No. 9

Table of Contents

Preliminary pages

Introduction ............................................................................................................................................................ i

Scope ............................................................................................................................................................ i

Associated Publications ........................................................................................................................................................ ii

Symbols ............................................................................................................................................................ ii

Table of contents (this table) ............................................................................................................................................. iii

Abbreviations ............................................................................................................................................................ viii

Glossary ............................................................................................................................................................ ix

Returned Goods Procedure for Europe ......................................................................................................................... xi

Returned Materials Procedure for USA .......................................................................................................................... xii

Approved Service Agents ..................................................................................................................................................... xii

ATEX Certified ADTS Hand Terminal ................................................................................................................................ xiii

Pressure Units and Conversion Factors ........................................................................................................................xiv

Section page

1 DESCRIPTION

1.1 Introduction ................................................................................................................................................. 1-1

1.2 Operating Range and Performance ................................................................................................ 1-3

1.3 Operating Limits ........................................................................................................................................ 1-3

2 INSTALLATION

2.1 Packaging ..................................................................................................................................................... 2-1

2.2 Packaging for Storage and Transportation .................................................................................2-1

2.3 Electrical Connection .............................................................................................................................. 2-5

2.4 Pneumatic Pressure Connections ..................................................................................................... 2-7

2.5 Positioning of the ADTS 405 ................................................................................................................. 2-8

2.6 Positioning of the ADTS 405F .............................................................................................................. 2-9

3 OPERATION

3.1 Preparation .................................................................................................................................................. 3-1

3.2 Display Functions and Units of Measure ...................................................................................... 3-2

3.3 Quick Reference ......................................................................................................................................... 3-3

3.4 First Time Operators ................................................................................................................................ 3-4

3.5 Operation and Example Procedures ............................................................................................... 3-10

3.5.1 Checks Before Use .................................................................................................................... 3-10

3.5.2 Operating Procedures ............................................................................................................. 3-10

3.6 Power-up ....................................................................................................................................................... 3-10

3.7 Control or Measure Parameter .......................................................................................................... 3-11

3.8 Leak Testing the ADTS 405 ................................................................................................................... 3-12

3.9 Displays ......................................................................................................................................................... 3-15

3.10 Rate Timer Displays ................................................................................................................................. 3-17

3.11 Pt Only Display ........................................................................................................................................... 3-18

3.12 Changing the Display ............................................................................................................................. 3-18

3.13 Changing the Units .................................................................................................................................. 3-19

3.14 Limit Checking ............................................................................................................................................ 3-19

Aircraft System Protection ...................................................................................................................3-21

Mach Test and Constant Mach .......................................................................................................... 3-21

CONTENTS

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K114 Issue No. 9

Table of Contents (contd)

Section page

True Airspeed ..............................................................................................................................................3-21

Airspeed Switch Test ............................................................................................................................... 3-22

Engine Pressure Ratio (EPR) ................................................................................................................. 3-23

3.15 Testing Aircraft Systems or UUT ....................................................................................................... 3-24

3.15.1 Go to Ground and Shut-Down ............................................................................................ 3-24

3.16 Options ........................................................................................................................................................... 3-25

SCPI IEEE 488 Option ............................................................................................................................... 3-25

Altimeter Encoder Option ..................................................................................................................... 3-25

ARINC 429 Option ..................................................................................................................................... 3-25

3.17 SETUP and CONFIGuration ...................................................................................................................3-26

3.18 Quick Reference ......................................................................................................................................... 3-26

4 MAINTENANCE

4.1 Introduction ................................................................................................................................................. 4-1

4.2 Materials........................................................................................................................................................ 4-2

4.3 Maintenance Tasks .................................................................................................................................. 4-3

4.4 Routine Maintenance .............................................................................................................................. 4-4

5 TESTING AND FAULT FINDING

5.1 Introduction ................................................................................................................................................. 5-1

5.2 Standard Serviceability Test ............................................................................................................... 5-2

5.3 Self-test Errors ............................................................................................................................................ 5-4

5.4 Venting after Over-pressure ............................................................................................................... 5-4

5.5 Fault Diagnosis .......................................................................................................................................... 5-5

5.6 Further Testing ........................................................................................................................................... 5-8

Test Environment and Preliminary Operations .......................................................... 5-8

Pressure Leak Check ...............................................................................................................5-8

Vacuum Leak Check ................................................................................................................ 5-9

Controller Stability .................................................................................................................... 5-10

5.7 Testing an Option Facility .....................................................................................................................5-11

Testing the IEEE 488 Facility................................................................................................................ 5-11

Configuring and Enabling the IEEE 488 Facility ......................................................................... 5-11

Programming a Test of the IEEE 488 Facility .............................................................................. 5-12

Connection of the IEEE 488 Facility ................................................................................................. 5-13

Testing the Altimeter Encoder Option............................................................................................. 5-14

Configuring and Enabling the Altimeter Encoder Option...................................................... 5-14

Optional cable (AAU-32) ......................................................................................................................... 5-15

Testing the ARINC 429 Option ............................................................................................................ 5-16

Configuring and Enabling the ARINC 429 Option ..................................................................... 5-16

5.8 Fault Finding ................................................................................................................................................ 5-17

5.8.1 Error Messages ...........................................................................................................................5-17

5.8.2 Warning Messages ................................................................................................................... 5-18

6 REFERENCE and SPECIFICATION

6.1 Introduction ................................................................................................................................................. 6-1

6.2 Main Pressure Display ............................................................................................................................ 6-1

F1 - F4 ............................................................................................................................................. 6-1

ALT Ps .............................................................................................................................................. 6-2

Druck ADTS 405 User Manual

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K114 Issue No. 9

Table of Contents (contd)

Section page

SPEED Qc ....................................................................................................................................... 6-2

MACH Pt ......................................................................................................................................... 6-3

EPR .................................................................................................................................................... 6-4

ROC Ps RATE ................................................................................................................................ 6-4

RATE TIMER ................................................................................................................................... 6-4

HOLD ............................................................................................................................................... 6-5

RATE ................................................................................................................................................. 6-6

LEAK MEASURE/CONTROL ..................................................................................................... 6-6

GROUND ........................................................................................................................................ 6-7

PORT ................................................................................................................................................ 6-9

REMOTE .......................................................................................................................................... 6-9

PRINT ............................................................................................................................................... 6-9

EXECUTE TEST PROGRAM ...................................................................................................... 6-10

HELP ................................................................................................................................................. 6-12

or (nudge keys) .................................................................................................................. 6-12

0 to 9 ................................................................................................................................................ 6-12

-000 .................................................................................................................................................. 6-13

CLEAR/QUIT .................................................................................................................................. 6-13

ENTER .............................................................................................................................................. 6-14

CLEAR/QUIT + ENTER (ABORT) .............................................................................................................6-14

6.3 SET-UP ............................................................................................................................................................ 6-15

FULL SET-UP ................................................................................................................................................ 6-15

SETUP, [UNITS] ............................................................................................................................ 6-16

SETUP, [LIMITS] ........................................................................................................................... 6-16

SETUP, [OSC] ................................................................................................................................ 6-17

SETUP, [MORE], [CONTROL],[Ps Pt DUAL] ....................................................................... 6-17

SETUP, [MORE], [DISPLAYS/OPTIONS],[DISPLAY TYPE] ............................................. 6-18

SET-UP, [MORE], [DISPLAYS/OPTIONS],[OPTIONS]...................................................... 6-20

SETUP, [MORE], [CLOSE OUTPUT VALVES]...................................................................... 6-20

SETUP, [MORE], [OPEN OUTPUT VALVES] ....................................................................... 6-20

SET-UP, [MORE], [SYSTEM SELF TEST]............................................................................... 6-20

SET-UP, ALT .................................................................................................................................. 6-21

SET-UP, SPEED [AUTO ZERO] ................................................................................................ 6-21

SET-UP, SPEED [CAS/TAS] ...................................................................................................... 6-21

SET-UP, SPEED [Pt TEMPERATURE] .................................................................................... 6-23

SET-UP, MACH ............................................................................................................................. 6-23

SET-UP, RATE TIMER ................................................................................................................................. 6-23

SET-UP, RATE ............................................................................................................................... 6-23

SET-UP, LEAK MEASURE CONTROL, [AUTO LEAK] ....................................................... 6-24

SET-UP, LEAK MEASURE CONTROL, [AUTO LIMIT] ...................................................... 6-24

SET-UP, GROUND .......................................................................................................................6-24

SET-UP, PORT ............................................................................................................................... 6-24

SET-UP, PRINT,[DATE/TIME]................................................................................................... 6-2

SET-UP, EXECUTE TEST PROGRAM ..................................................................................... 6-24

SET-UP, HELP ............................................................................................................................... 6-25

SET-UP,

or (nudge keys) ................................................................................................ 6-25

CONTENTS

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K114 Issue No. 9

Table of Contents (contd)

Section page

MINIMUM SET-UP ............................................................................................................................................................ 6-26

SETUP, [UNITS], [AERO] ........................................................................................................... 6-26

SETUP, [UNITS], [PRESS] ..........................................................................................................6-26

SETUP, [LIMITS] ........................................................................................................................... 6-26

SETUP, ALT/Ps.............................................................................................................................. 6-27

SETUP, PORT ................................................................................................................................. 6-27

SETUP, HELP ................................................................................................................................. 6-27

6.4 CONFIGURATION ....................................................................................................................................... 6-28

Procedure...................................................................................................................................... 6-28

Functions ....................................................................................................................................... 6-28

CONFIG,[UNITS] .......................................................................................................................... 6-29

CONFIG, [LIMITS],[EDIT LIMITS],[EDIT EXISTING] ..........................................................6-29

NAME ............................................................................................................................................... 6-30

MIN ALT,MAX ALT, MIN CAS, MAX CAS ............................................................................. 6-30

MAX MACH .................................................................................................................................... 6-30

MAX ROC, MAX RATE CAS ....................................................................................................... 6-30

MIN Ps, MAX Ps, MIN Qc, MAX Qc ....................................................................................... 6-30

MAX RATE Ps, MAX RATE Qc.................................................................................................. 6-30

ARINC LIMITS ............................................................................................................................... 6-30

ALTITUDE CORRECTION ..........................................................................................................6-31

SAVING LIMITS ............................................................................................................................. 6-31

CONFIG, [LIMITS],[EDIT LIMITS],[MAX LIMITS] ................................................................ 6-32

CONFIG, [LIMITS],[EDIT LIMITS],[EDIT NEW] ................................................................... 6-32

CONFIG, [LIMITS],[CLEAR LIMITS] ........................................................................................6-32

CONFIG, [LIMITS],[LOCK AIRCRAFT] ...................................................................................6-32

CONFIG, [LIMITS],[DEFAULT AIRCRAFT] ........................................................................... 6-32

CONFIG, [MORE],[CONTROL],[CONTROL MODE] .......................................................... 6-32

CONFIG, [MORE],[CONTROL],[CONTROL LOCK] ...........................................................6-32

CONFIG, [MORE],[DISPLAY/OPTIONS],[DISPLAY TYPE] .............................................. 6-32

CONFIG, [MORE],[DISPLAY/OPTIONS],[OPTIONS] ........................................................ 6-32

CONFIG, [MORE],[DATE/FORMAT] ....................................................................................... 6-32

CONFIG, [MORE],[SETUP MODE] .......................................................................................... 6-33

FULL ................................................................................................................................................. 6-33

MINIMUM ....................................................................................................................................... 6-33

OFF ................................................................................................................................................... 6-33

CONFIG, SPEED,[AUTO ZERO] ............................................................................................... 6-33

CONFIG, SPEED,[CAS/TAS] ..................................................................................................... 6-33

CONFIG, SPEED,[Pt TEMPERATURE] ................................................................................... 6-33

CONFIG, RATE TIMER ................................................................................................................6-33

CONFIG, RATE .............................................................................................................................. 6-33

CONFIG, LEAK MEASURE, [AUTO LEAK ON/OFF] .........................................................6-33

CONFIG, LEAK MEASURE, [AUTO LEAK LOCK] ..............................................................................6-33

CONFIG, LEAK MEASURE, [AUTO LIMIT ON/OFF] ......................................................................... 6-33

CONFIG, LEAK MEASURE, [AUTO LIMIT LOCK] ..............................................................................6-33

CONFIG, GROUND ..................................................................................................................................... 6-33

Druck ADTS 405 User Manual

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K114 Issue No. 9

Table of Contents (contd)

Section page

CONFIG, PORT ............................................................................................................................. 6-34

CONFIG, REMOTE ....................................................................................................................... 6-34

CONFIG, ETP,[AUTO RUN] ....................................................................................................... 6-34

CONFIG, ETP,[ERASE PROGRAMS] ...................................................................................... 6-34

CONFIG, ETP,[RESULT] ............................................................................................................. 6-34

CONFIG,

or (nudge keys) ............................................................................................... 6-34

CONFIG, 000 ................................................................................................................................................ 6-34

6.5 Specification ................................................................................................................................................ 6-35

Zone 2 Hazardous Area Definition ................................................................................................... 6-42

List of Illustrations

Figure page

Figure 1-1 ADTS 405 General View.......................................................................................................................... 1-2

Figure 1-2 ADTS 405F General View ....................................................................................................................... 1-2

Figure 2-1 Equipment and Parts .............................................................................................................................. 2-3

Figure 2-2 ADTS 405 Altitude Reference .............................................................................................................. 2-8

Figure 2-3 ADTS 405F Altitude Reference ............................................................................................................ 2-9

Figure 2-4 ADTS 405 General View.......................................................................................................................... 2-10

Figure 2-5 ADTS 405 Rear Panel View ................................................................................................................... 2-11

Figure 2-6 ADTS 405F General View ....................................................................................................................... 2-12

Figure 3-1 Front Panel ................................................................................................................................................... 3-2

Figure 3-2 Main Pressure Display (Leak Measure Mode) .............................................................................. 3-12

Figure 3-3 Main Pressure Display (Control Mode)............................................................................................ 3-13

Figure 3-4 Single Display ............................................................................................................................................. 3-15

Figure 3-5 Dual Display ................................................................................................................................................ 3-16

Figure 3-6 Triple Display .............................................................................................................................................. 3-16

Figure 3-7 Rate Timer Display Aeronautical Units .......................................................................................... 3-17

Figure 3-8 Rate Timer Display Pressure Units ................................................................................................... 3-17

Figure 3-9 Pt Only Display ........................................................................................................................................... 3-18

Figure 5-1 Fault Finding Chart .................................................................................................................................. 5-6

Figure 6-1 Altitude Correction Rack Mounting .................................................................................................. 6-22

Figure 6-2 Altitude Correction On-aircraft .......................................................................................................... 6-22

Figure 6-3 ARINC 565 Operating Limits ................................................................................................................ 6-31

List of Tables

Table page

2-1 Parts List ........................................................................................................................................................ 2-4

4-1 Maintenance Chart .................................................................................................................................. 4-1

4-2 Materials List ............................................................................................................................................... 4-2

4-3 Tool and Test Equipment Requirements ....................................................................................... 4-2

5-1 Fault Finding ................................................................................................................................................ 5-7

5-2 Error Messages .......................................................................................................................................... 5-17

5-3 Warning Messages ................................................................................................................................... 5-18

Page 12

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K114 Issue No. 9

Druck ADTS 405 User Manual

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 ATEX Equipment for Use in Potentially Explosive Atmosheres 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 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 °F Degrees Fahrenheit

Page 13

K114 Issue No. 9

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.

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 make sure 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.

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

Operate: Make sure that an item or system functions correctly as far as possible without

the use of test equipment or reference to measurement.

Power-up: To perform operations necessary to switch on a system ready for use.

Glossary

Page 14

K114 Issue No. 9

Power-down: To perform operations necessary to safely switch off a system after use.

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.

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 required 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 User Manual

Page 15

K114 Issue No. 9

Returned Goods Procedure

for Europe

Should the unit become unserviceable and require repair it can be returned to the Druck Service Department.

Please contact our Service Department, either by 'phone, fax or e-mail to obtain a Returned Goods Authorization (RGA) number, providing the following information:

Product (i.e. ADTS 405)

Pressure medium (i.e. air, nitrogen)

Serial number

Details of defect/work to be undertaken

Operating conditions

Safety Precautions

You must also tell us if the product has been in contact with anything hazardous or toxic and the relevant COSH references and precautions to be taken when handling.

Important notice

Service by unauthorized sources will affect the warranty and may not guarantee further performance.

Page 16

xii

K114 Issue No. 9

Returned Material Procedure

for USA

Should the equipment become unserviceable it can be returned to the Druck Service Department.

Please contact our Service Department, either by 'phone, fax or e-mail to obtain a Returned Material Authorization (RMA) number, providing the following information:

Product (i.e. ADTS 405)

Pressure medium (i.e. air, nitrogen)

Serial number

Details of defect/work to be undertaken

Operating conditions

Safety Precautions

You must also tell us if the product has been in contact with anything hazardous or toxic and, the relevant MSDS references and precautions to be taken when handling.

Important notice

Service by unauthorized sources will affect the warranty and may not guarantee further performance.

Approved Service Agents

For the list of service centres visit our web site:

www.gesensing.com

Page 17

xiii

K114 Issue No. 9

ATEX Certified ADTS Hand Terminal

CONDITIONS OF USE

The ATEX certified ADTS hand terminal supplied with the ADTS 405 can be used in zone 2 hazardous areas in accordance with the ATEX certification document and schedule.

ATEX Certificate of Conformity

No. Baseefa05ATEX0192

BASEEFA being an Approved Certification Body, in accordance with Article 14 of the Council Directive of the European Communities of 18th December, 1975 (76/117/EEC) certifies that the apparatus has been found to comply with harmonised European Standards:

EN 60079-15: 2003

and has successfully met the examination and test requirements recorded in confidential report number:

05(C)0154 (Baseefa) dated 12th October 2005

NOTE: Refer to pages 2/2 of the Certificate of conformity for electrical connection parameters.

Rated Voltage = 32Vdc.

Marking detail:

ADTS Hand Terminal Baseefa05ATEX0192

II 3G IP54

Baseefa05ATEX0192 (EC type examination certificate number)

EEx nA nL IIC T4 (-25°C

amb

<=55°C)

Druck, LE6 0FH, UK

6 - 32V

Power 3W Max

SPECIAL CONDITION OF USE

• The power supplies must be isolated when connecting the ADTS hand terminal in the

hazardous area.

• The ADTS hand terminal must not be disconnected when energized in the hazardous

area.

• The ADTS hand terminal is a non-serviceable component. If the ADTS hand terminal

becomes unserviceable it can only be replaced by another ATEX compliant hand terminal.

Page 18

xiv

K114 Issue No. 9

Table of pressure units and conversion factors

Unit Conversion To convert FROM pressure VALUE 1 in pressure UNITS 1

TO pressure VALUE 2 in pressure UNITS 2, calculate as follows:

VALUE 2 = VALUE 1 x

FACTOR 1

FACTOR 2

Note

The conversion factor for pressure units referenced [1] are calculated for a water temperature of 4°C. Pressure units referenced [2] are calculated for a water temperature of 68°F these units are normally used in the USA.

tinuerusserP )slacsaP(rotcaF tinuerusserP )slacsaP(rotcaF

rab000001tf/fbl

3088.74

ni/fbl

)isp(67.4986gHni93.6833

O56.6089Hni

]1[O980.942

rabm001Htf

]1[O70.9892

mc/fgk

5.66089mta0.523101

m/fgk

56608.9tf/ldp

61884.1

gHmm223.331mc/nyd

1.0

gHmc22.3331rabh00000001

gHm0.223331tf/fnot

)KU(0.252701

H/mm

]1[O56608.9ni/fnot

)KU(00344451

H/mc

]1[O5660.89Hni

]2[)ASU(O53146.842

m/N

1Htf

]2[)ASU(O3896.3892

aPh001mm/pk

0566089

aPk0001mc/pk

5.66089

aPM0000001m/pk

56608.9

rrot223.331

Pressure units and conversion factors

Page 19

1 - 1Description

K114 Issue No. 9

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.

Page 20

Druck ADTS 405 User Manual

1 - 2

K114 Issue No. 9

FIGURE 1-2 ADTS 405F GENERAL VIEW

FIGURE 1-1 ADTS 405 GENERAL VIEW

DRUCKADTS 405 ATEXCOMPLIANT

HANDTERMINAL

DONOT DISCONNECT WHEN

ENERGIZEDIN THE HAZARDOUS AREA

Ps 1013. 25 mbar Aim 1013. 25< Pt 3199. 91 mbar Aim 3200. 00

DONOT DISCONNECT WHEN

ENERGIZEDIN THE HAZARDOUS AREA

DRUCKADTS 405 ATEXCOMPLIANT

HANDTERMINAL

Page 21

1 - 3Description

K114 Issue No. 9

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.

1.3 Operating Limits

The following sets of operating limits are supplied with the ADTS 405.

850 knot range operating limits

retemaraP stimiLxaM stimildradnatS stimilliviC

tlAniMtf000,3-tf000,2-tf000,1-

tlAxaMtf000,501tf000,08tf000,05

SACniMstk001-stk0.0stk0

SACxaMstk058stk05

8stk054

sPniMrabm0.3rabm516.72rabm279.511

sPxaMrabm00.5531rabm756.8801rabm604.0501

cQniMrabm00.253,1-rabm0.0rabm0

QxaMrabm00.007,1rabm00.8861rabm10.863

hcaMxaM53.215.21

CORxaMnim/tf000,001nim/tf000,9nim/tf000,6

SACetaRxaMnim/stk

000,2nim/stk006nim/stk006

sPetaRxaMnim/rabm00.000,01nim/rabm00.002nim/rabm00.001

cQetaRxaMnim/rabm00.000,01nim

/rabm00.002nim/rabm00.001

stimiLCNIRAFFOFFOFFO

noitcerroCtlAtf0tf0tf0

Page 22

Druck ADTS 405 User Manual

1 - 4

K114 Issue No. 9

retemaraP stimiLxaM stimildradnatS stimilliviC

tlAniMtf000,3-tf000,3-tf000,1-

tlAxaMtf000,501tf000,08tf000,05

SACniMstk001-stk0stk0

SACxaMstk000,1stk00

0,1stk054

sPniMrabm0.3rabm516.72rabm279.511

sPxaMrabm00.5531rabm920.821,1rabm604.0501

cQniMrabm00.253,1-rabm303.6

1-rabm0

cQxaMrabm00.005,2rabm05.094,2rabm10.863

hcaMxaM79.4151

CORxaMnim/tf000,001nim/tf000,51nim/tf000,6

SACetaRxa

Mnim/stk000,2nim/stk007nim/stk006

sPetaRxaMnim/rabm00.000,01nim/rabm00.002nim/rabm00.001

cQetaRxaMnim/rabm00.0

00,01nim/rabm00.002nim/rabm00.001

stimiLCNIRAFFOFFOFFO

noitcerroCTLAtf0tf0tf0

1000 knot range operating limits

Page 23

K114 Issue No. 9

Installation 2 - 1

2 INSTALLATION

2.1 Packaging

Packaging List - ADTS 405

i) Rack ADTS 405 ii) Power supply cable iii) User Manual (this publication) iv) Output, hose, 2.5m, red, AN6 - open v) Output, hose, 2.5m, blue, AN4 - open vi) Input, hose, 2.5m, green, AN6 - open vii) Input, hose, 2.5m, yellow, AN4 - open viii) Spare fuses (2 off) ix) Plug, expansion port

Packaging List - ADTS 405F

i) Flight line ADTS 405F ii) Accessory bag iii) Power supply cable iv) Hand terminal v) Hand terminal cable - 2 m vi) Hand terminal cable - 18 m vii) Output, hose, 2.5m, red, AN6 - open viii) Output, hose, 2.5m, blue, AN4 - open ix) User Manual (this publication) x) Spare fuses (2 off)

2.2 Packaging for Storage or Transportation

 To store the unit or to return the unit for calibration or repair carry out the following

procedures:

1. Pack the unit as detailed in the following procedure.

2. To return the unit for calibration or repair complete the return goods procedure as detailed in the preliminary pages.

 On receipt of the ADTS 405 check the contents of the packaging against the following

lists:

Page 24

K114 Issue No. 9

2 - 2 Druck ADTS 405 User Manual

Procedure

 The unit should be at zero/ambient pressure. Disconnect the hose assemblies and

stow in the shoulder bag.

 Switch OFF and disconnect from the electrical power supply. Disconnect the

power supply cable and the hand terminal cable. Disconnect the hand terminal cable from the hand terminal.

 Stow the power supply cable, hand terminal cable and the hand terminal in the

ADTS 405F lid. For ADTS 405 rack units these items should be placed in a sealed polythene bag.

 Fit the lid to the unit.

 If available, use the original packing material. When using packing materials other

than the original, proceed as follows.

 Wrap unit in polyethylene sheeting.

 Select a double-wall cardboard container. Inside dimensions must be at least

15 cm greater than the equipment. The carton must meet test strength requirements of >125 kg.

 Protect all sides with shock-absorbing material to prevent equipment movement

within the container.

 Seal carton with approved sealing tape.

 Mark carton “FRAGILE” on all sides, top, and bottom of shipping container.

Environment

 The following conditions apply for both shipping and storage:

 Temperature Range-40° to +70°C (-40° to +158°F)

 Altitude......................... Up to 15,000 feet (4,570 metres)

Page 25

K114 Issue No. 9

Installation 2 - 3

DONOT DISCONNECT WHEN

ENERGIZEDIN THE HAZARDOUS AREA

DRUCK ADTS 405

ATEXCOMPLIANT

HAND TERMINAL

FIGURE 2.1 EQUIPMENT AND PARTS

11a

18m

Page 26

K114 Issue No. 9

2 - 4 Druck ADTS 405 User Manual

TABLE 2-1 PARTS LIST

oN rebmuNtraP noitpircseD nOdesU

repytQ

yssa

0M-93-8271-504STDAredluohS,gaB

F504STDA

0M-63-8271-504STDAgniR-O/esuF,tiK

F504STDA

dna

504STDA

1M-73-8271-504STDA,lanimretdnaH

F504STDA

dna

504STDA

0M-74-8271-504STDA)dnEnepOV062(M5,rewoPCA,elbaC

F504STDA

dna

504STDA

0M-82-8271-504STDAM2lanimretdnaH,elbaC

F504STDA

dna

504STDA

0M-72-8271-504STDAM81lanimretdnaH,elbaC

F504STDA

dna

504STDA

*b6

0M-92-8271-504STDA)noitpO(M03lanimretdnaH,elbaC

0M-25-9271-504STDA)nepO/TSNAM5.2x2(rotpadaesoh,tiK

F504STDA

dna

504STDA

0M-16-9271-504STDA6NA,NPO/TS,der,)sP(citatS,esoH

)elbaliavasnoitpolaicepS(

F504STDA

dna

504STDA

0M-26-9271-504STDA4NA,NPO/TS,eulb,)tP(totiP,esoH

)elbaliavasnoitpolaicepS(

F504STDA

dna

504STDA

0M-43-8271-504STDA)dnEnepO()rotcennoCralucriC(CNIRA,elbaC

)noitpO(

F504STDA

dna

504STDA

a11

0M-53-8271-504STDA)dnEnepO(M6,redocnEretemitlA,elbaC

)noitpO(

F504STDA

dna

504STDA

*b11

0M-16-1981-504STDA)sretemitla23-UAA(M6,elbaCredocnEretemitlA

)noitpO(

0M-84-8271-504STDA)noitpO(M5,rewoPCD,elbaC

F504STDA

0M-22-1981-504STDAtropnoisnapxe,gulP

504STDA

ATEX certified

Page 27

K114 Issue No. 9

Installation 2 - 5

2.3 Electrical Connection

WARNINGS: 1 VOLTAGES IN EXCESS OF 30 VOLTS (RMS) AC OR 50VOLTS DC,

IN CERTAIN CIRCUMSTANCES, CAN BE LETHAL. CARE MUST BE TAKEN WHEN WORKING ON LIVE, EXPOSED CONDUCTORS.

2 DO NOT DISCONNECT THE HAND TERMINAL WHEN ENERGIZED IN THE

HAZARDOUS AREA.

Power Supply Connection

The unit must be connected to the correct electrical power supply as stated, adjacent to the power connector.

CAUTIONS:

HE SUPPLY MUST PROVIDE CONNECTION TO A PROTECTIVE GROUND TERMINAL. THE UNIT

MUST

, AT ALL TIMES, BE CONNECTED TO THE SUPPLY EARTH (GROUND).

HE POWER SUPPLY CABLE AND CONNECTOR MUST BE CORRECTLY RATED FOR THE POWER

SUPPLY

Note: The ADTS 405 is normally supplied with an approved power supply cable

for use in the country of delivery. This can limit the maximum supply voltage that can be safely used. e.g. a NEMA 5-15P terminated cable, for use in the U.S.A., is approved for a maximum of 125 V ac; it must be replaced for a higher supply voltage.

ADTS 405 rack mounted units

 Make sure that the power supply is off before connecting the power cable .

 If required, connect the hand terminal to the connector using either the 2 metre or 18

metre cable.

Note: Connecting the hand terminal disables the front panel key-pad.

 Fit the expansion port plug (item 13, Table 2-1) to the rear panel expansion port.

Note: For units used with the Druck PV 103 Pump Unit connect the expansion cable, supplied

with the PV 103, to the expansion port.

Pin European U.S. Function

Colour Color

1 Brown Black Live

4 Blue White Neutral

Centre Green/Yellow Green Protective Earth

(Ground)

Page 28

K114 Issue No. 9

2 - 6 Druck ADTS 405 User Manual

Note: The unit will not be damaged if AC power and DC power are connected at the same time.

Flight line units



Make sure that the power supply is off before connecting the power cable and hand terminal cable.

Note: The flight line version power cable supplies both the electronics and pump racks.

 If required, connect the hand terminal to the connector on the front panel using either

the 2 metre or 18 metre cable.

Note: Connecting the hand terminal disables the front panel key-pad.

 The two fuses, located in the holders and mounted on the front panel, protect the

Electronics Rack and the Pump Rack. The fuses are connected in the live supply circuit and are rated at:

5A anti-surge HBC 250V

 An external earth (ground) cable may be connected to the stud on the front panel of

the pump rack to ensure integrity of the earth (ground) connection.

DC Power Option

The DC power option (nominal 28 V DC), can be an alternative power supply using an additional connector. This is located on the rear of the rack (ADTS 405) or on the pump front panel (ADTS 405F) both have the same connector details.

Pin European U.S. Function

Colour Color

1 Grey Gray +28V

2 White White 0V Return

Protective Earth Protective Ground Protective Earth (Ground) (Ground)

Page 29

K114 Issue No. 9

Installation 2 - 7

2.4 Pneumatic Pressure Connections

ADTS 405 rack-mounted unit

Static (Ps) ............................................................................................................................ AN-6 37° flare

Pitot (Pt) ............................................................................................................................ AN-4 37° flare

Pressure supply ....................................................................................................................... AN-4 37° flare

Vacuum supply ........................................................................................................................ AN-6 37° flare

 Connect pressure and vacuum supplies to the rear panel PRESSURE and VACUUM

connectors. The pressure supply should be clean, dry gas, nitrogen or air refer to the specification.

 Connect the Unit Under Test (UUT) to either the front panel or optional rear panel Ps

(static) and Pt (pitot) output connectors.

Note: Blanking caps must be fitted on unused front or rear outputs.

ADTS 405F flight line

Static (Ps) ............................................................................................................................ AN-6 37° flare

Pitot (Pt) ............................................................................................................................ AN-4 37° flare

Pressure supply ....................................................................................................................... AN-4 37° flare

Vacuum supply ........................................................................................................................ AN-6 37° flare

Auxiliary vacuum supply ..................................................................................................... AN-4 37° flare

 In normal operation make sure that the correct blanking caps are fitted to the external

connectors.

 The external pressure and vacuum connections are used when an external pump unit

supplies the pressure and vacuum. This may increase the maximum achievable rates of change when connected to large volume systems.

 The auxiliary vacuum, AUX VACUUM, can be used to supply the suction-type static

adaptors and provides a nominal 100 mbar (3 inHg) absolute vacuum. When not in use, a blanking cap must be fitted.

Note: A leak of this blanking cap affects the performance of the ADTS 405F.

Page 30

K114 Issue No. 9

2 - 8 Druck ADTS 405 User Manual

Single channel operation



For single pipe testing of airspeed indicators or similar, requiring only Pt (pitot), connect the UUT to Pt (pitot). The Ps (static) output must be left open to atmosphere (no blanking cap) to provide a reference pressure.

Note: The Pt ONLY mode of operation must be used in this configuration.

 For single pipe testing of altimeters or similar, requiring only Ps (static), connect the

UUT to Ps (static). The Pt (pitot) output should be left with a blanking cap fitted.

Note: The Ps ONLY mode of operation must be used in this configuration.

2.5 Positioning of the ADTS 405

 It is important that the position of the ADTS 405 in relation to the components under

test is known. An altitude correction must be made to allow for the difference in height between the reference level, indicated on the mimic panel, and the components under test. The Reference section contains details of altitude correction (SETUP, ALTITUDE).

FIGURE 2-2 ADTS 405 ALTITUDE REFERENCE

WARNING: OBSERVE THE APPROPRIATE SAFETY

INSTRUCTIONS AND PROCEDURES DETAILED IN THE COMPONENT MAINTENANCE MANUALS.

Page 31

K114 Issue No. 9

Installation 2 - 9

reference level

inst

AIR DATA COMPUTER

STATIC

PITOT

reference level

altitude correction value

Corrected altitude = Altitude measurement - Altitude correction value

Zone 2 defined hazardous area

2.6 Positioning of the ADTS 405F

WARNING: DO NOT DISCONNECT THE ATEX CERTIFIED HAND TERMINAL WHEN

ENERGIZED IN THE HAZARDOUS AREA. THIS CAN CAUSE AN EXPLOSION.

 To operate safely, the ADTS 405F must be placed outside the user defined zone 2

hazardous area. Only the ATEX certified hand terminal may be used inside the defined zone 2 hazardous area (refer to section 6.5 for a definition).

 It is important that the position of the ADTS 405F in relation to the aircraft altitude

sensors is known. An altitude correction must be made to allow for the difference in height between the reference level and the aircraft's altitude sensors. The Reference section contains details of altitude correction.

WARNING: OBSERVE THE APPROPRIATE SAFETY

INSTRUCTIONS AND PROCEDURES DETAILED IN THE AIRCRAFT MAINTENANCE MANUALS.

IGURE 2-3 ADTS 405F ALTITUDE REFERENCE

Page 32

K114 Issue No. 9

2 - 10 Druck ADTS 405 User Manual

FIGURE 2-4 ADTS 405 GENERAL VIEW

Page 33

K114 Issue No. 9

Installation 2 - 11

FIGURE 2-5 ADTS 405 REAR PANEL VIEW

Page 34

K114 Issue No. 9

2 - 12 Druck ADTS 405 User Manual

FIGURE 2-6 ADTS 405F GENERAL VIEW

DONOT DISCONNECT WHEN

ENERGIZEDIN THE HAZARDOUS AREA

System

status

indicator

Solenoid

valve status

indicator

Key-pad

and

display

Cover plate

for option

connectors

Static

output

connector

Connector cable

(2m or 18m)

Hand

terminal

Pitot

output

connector

Altitude

reference

Auxiliary

Vacuum

input

connector

Vacuum

input

connector

Calibration

enable

switch

Power

supply

switch

Pump

switch

ARINC 429/

Altimeter

encoder

connector

(optional)

AC power

supply

connector

DC power

supply

connector

(optional)

DC and

AC power

supply

fuses

Pressure

input

connector

Fan

outlet

cover

Elapsed

time

indicator

DRUCK ADTS 405

ATEXCOMPLIANT

HAND TERMINAL

Page 35

K114 Issue No. 9

Druck ADTS 405 User Manual 3 - 1

3 OPERATION

3.1 Preparation

WARNING:

OBSERVE SAFETY PRECAUTIONS STATED IN LOCAL ORDERS AND THE AIRCRAFT OR EQUIPMENT SERVICING PROCEDURES.

 Make sure the electrical and pneumatic connectors, electrical cables and pipes and

positioning of the ADTS 405 comply with the instructions and requirements in Section 2 Installation.

 Carry out the following before use:

 If necessary, carry out the maintenance task detailed in Section 4.

 Make sure the air data test system power supply switch on the front panel is set

to OFF. Connect the air data test system to the electrical supply, make sure the supply includes a connection to a protective earth.

 Inspect the pneumatic hoses for damage, ingress of dirt and moisture. Make

sure the aircraft adaptors are serviceable.

 Connect, to the air data test system, the hoses necessary for the test procedures to be

carried out: red hose to the STATIC output (Ps), blue hose to the PITOT output (Pt). Temporarily seal the free ends of the hoses.

Note: When connected, take care not to kink or stand on the hoses.

 Connect the hand terminal to the air data test system through the HAND TERMINAL

connector on the front panel. If necessary, connect the hand terminal through the extension cable.

 Before use, the ADTS 405 should be tested, for first time users see section 3.4, for users

requiring more operating detail see section 3.5.

 This section contains a quick reference chart showing all the functions of the key-pad.

Further quick reference charts show the set-up and configuration settings for each key-pad function.

 Review and become familiar with the whole procedure before starting the test process

on an aircraft or component.

Page 36

K114 Issue No. 9

3 - 2 Operation

3.2 Display Functions and Units of Measure

 When operating in either pressure measuring or pressure controlling modes, the ADTS

405 can display the following information:

Aeronautical Functions Display Abbreviation Displayed Units

(if applicable)

Altitude ALT ft, m Calibrated and True Airspeed CAS, TAS kts, km/h, mph Mach MACH Rate of Climb ROC ft/m, m/m, m/s, hm/m Rate of Airspeed Rt CAS, kts/m, km/h/m, mph/m Rate of Mach RtMCH Mach/m

Pressure Functions Display Abbreviation Displayed Units

(if applicable)

Static (Absolute) Ps [P] Pitot (Absolute) Pt [P] Dynamic or Impact (Differential) Qc [P] Engine Pressure Ratio EPR Rate of Ps Rt Ps [P] /m Rate of Pt Rt Pt [P] /m Rate of Qc Rt Qc [P] /m Rate of EPR Rt EPR EPR/m

Where [P] is the currently selected pressure units from the following list:

mbar, inHg, mmHg, inH2O (4°C), inH2O (20°C), psi, hPa, kPa, inH2O (60°F), kg/cm2, %FS

FIGURE 3-1 FRONT PANEL

Page 37

K114 Issue No. 9

Druck ADTS 405 User Manual 3 - 3

the display shows the main pressure display (Leak Measure or Control mode).

KEY-PAD FUNCTION

F1-F4

ALT Ps SPEED Qc MACH Pt EPR ROC Ps RATE RATE TIMER

F1 F2

F3 HOLD RATE LEAK MEASURE/CONTROL

GROUND

[GO TO GROUND]

[DISPLAY QFE]

[DISPLAY QNH]

PORT REMOTE PRINT

[ALPHA]

[BACK]

data entry

EXECUTE TEST PROGRAM

[NEXT]

[PREV]

[RUN]

F2 HELP SETUP See QUICK REFERENCE -

SETUP or MINIMUM SETUP SETUP + F1 See QUICK REFERENCE - CONFIG

(nudge up) (nudge down) 0-9

-000 CLEAR/QUIT ENTER CLEAR/QUIT + ENTER

Function keys for menus

Altitude (Aeronautical units) or Ps (Pressure units) Airspeed (Aeronautical units) or Qc (Pressure units) Mach (Aeronautical units) or Pt (Pressure units) Engine Pressure Ratio (pressure units only) Rate of Climb (Aeronautical units) or Rate of Ps (Pressure units) Start timing rate of change Wait and time choice 1 Wait and time choice 2 Wait and time choice 3 Hold pressure at present value - Press again to release Rate of change of Pitot parameter - Press Pitot parameter then RATE

Switches between measure mode (for leak testing) and control mode

Controls Ps to atmospheric pressure and Qc to zero at current rates of change Display local atmospheric (ground) pressure Display sea level equivalent of local atmospheric pressure

See Line Switching Unit User Manual Switches (toggles) between remote and local operation Prints current parameter values Inserts alphabet character in user text Deletes last character of user text Numeric entry for user text

Execute down-loaded Test Programs Select next listed test program Select previous listed test program Execute selected test program Execute all tests in the test program Selects and executes a specific test program Press HELP then other key for further information Temporary set-up - lost at power down

Configuration - changes power-up defaults Hold F1 while pressing SETUP - then enter PIN

Increases aim value Decreases aim value Number entry Minus sign for first number entry 000 (thousand) if not first number of entry Clear number entry - quit from menu or clear warning message Complete number entry ABORT - restart with power-up

Key/selection Function and comments

3.3 Quick Reference

The quick reference chart shows normal operation key functions. In the key/selection column the following applies:

ALT - Key. [NEXT] - Item in menu (soft key). (SINGLE DOUBLE) - Sequence of parameters selected by NEXT key. (craft1 craft2...) - Sequence of names selected by NEXT key. data entry - Enter number from key-pad.

Page 38

K114 Issue No. 9

3 - 4 Operation

3.4 First Time Operators

 The following sequences of operation should be used by first time operators and by

operators that use the equipment occasionally. For regular users, familiar with the equipment, go to section 3.5. Set the power supply switch to OPERATE and the powerup routine starts.

(1) The display, on the front panel or hand-terminal, shows:

DK126 Iss 1.xx

Display Power Up

Please Wait

(2) After a short time the display shows:

DRUCK ADTS 405 DK263 VER 6.xx

Note:

Where x is the current issue number of the software.

(3)

Last Calibration dd/mm/yy (dmy) RPT Transducer PLEASE WAIT

Note:

Date format can be changed in configuration. For units fitted with the Solartron transducer, the display shows Solartron Transducer in place of RPT Transducer.

(4)

Self Test

PLEASE WAIT

Page 39

K114 Issue No. 9

Druck ADTS 405 User Manual 3 - 5

(5) The system opens the zero valves and after approximately 7 seconds the valves close

and the routine continues with the display shows:

Measuring Ground

Pressures

PLEASE WAIT

(6) The system opens the output valves and controls pressures at the original measured

values.

Equalising System Pressures (Valves May Pulse) PLEASE WAIT

(7) At switch on, check the hand-held terminal display.

Note:

The ADTS 405 is a continuous, self-monitoring system. If the system detects an error, the display shows an error message. Lists of errors are detailed in Section 5, Fault Finding and Testing.

ALT 0 ft Leak Measure

WARMUP

Note:

Wait 15 minutes, before continuing, to allow the system to get to thermal stability. The wait time can be reduced to 5 minutes if the system has been re-powered after a short time.

Operating modes

 The air data test system can now be set for a variety of functions and modes. In the

following, examples of measure mode, control mode, leak measure mode and go-toground show the key presses and selections required for each mode.

Page 40

K114 Issue No. 9

3 - 6 Operation

Measure Mode

SPEED

or or

Measured parameter

"leak-measure" when measure mode selected

Measured value

ALT

STATIC

MACH

PITOT

Units of measurement

SETUP

Change display

dual or triple

press:

single,

Change units from aeronautical to pressure:

[MORE]

[CONTROL]

[DISPLAYS/OPTIONS]

[OPTIONS]

[Ps Pt DUAL]

[DISPLAY TYPE]

[UNITS]

[SAVE]

[PREV]

[NEXT]

To select the measured parameter press:

kts

CAS

Alt

350

10000

Leak Measure

Page 41

K114 Issue No. 9

Druck ADTS 405 User Manual 3 - 7

Control Mode

Page 42

K114 Issue No. 9

3 - 8 Operation

Leak Measure Mode

Note: Compressing a gas generates heat. Gas heated or cooled in an enclosed volume

causes a pressure change. It is important, especially for leak testing, to allow enough time for the heated gas to cool and the pressure to stabilize. When setting the rate timer consider three factors:

1 The volume of the system to be tested (large volumes take longer to stabilize). 2 The pressure change (the higher the change the greater heat generated). 3 The ambient air temperature.

Page 43

K114 Issue No. 9

Druck ADTS 405 User Manual 3 - 9

Go to Ground

Page 44

K114 Issue No. 9

3 - 10 Operation

3.5 Operation and Example Procedures

3.5.1 Checks Before Use

 Inspection and Cleaning

Inspect the external of the ADTS 405, and its associated equipment, for damage, dirt, and the ingress of moisture. If necessary, use foam cleaner and a lint-free cloth to clean the external surfaces. Inspect the pressure outlet ports for ingress of dirt and moisture, clean if necessary with a lint-free cloth.

3.5.2 Operating Procedures

 The procedures show the steps required to make sure the ADTS 405 is serviceable and

the settings required to test an aircraft system or component. For further information refer to the quick reference charts, at the end of this section, and Section 6 - Reference and Specification.

In the following:

 All key presses are highlighted in bold and shown as identified on the key-pad.

 Key presses inside brackets e.g., [MORE], are soft key presses (i.e., function key

selections {F1 to F4} indicated on the display screen).

Help System

 The help information includes further details of the function and details associated

functions, also see the Reference Section 6.

3.6 Power-up

 Check the power indicator is illuminated and set the front panel power switch to

OPERATE.

 The display shows the following sequence:

a. Display power-up screen. b. ADTS 405 power-up screen. c. Date of the last calibration and type of main transducer fitted. d. Self-test message. e. Measuring ground pressure message. f. Equalising system pressures message. g. Display shows Leak Measure mode and the number of parameters last selected in

configuration.

 The ADTS 405 always powers-up in Leak Measure mode with the pressure controllers

off. When changing to Control Mode the pump unit must be switched on and producing the correct pressure and vacuum.

Note: The display at power-up can be changed, see CONFIGuration.

Page 45

K114 Issue No. 9

Druck ADTS 405 User Manual 3 - 11

 The ADTS 405 system may now be used but for full specification accuracy and

stability, wait the "WARMUP" period of 15 minutes. The display shows “WARMUP” in the lower right hand corner, this message clears automatically after the time period.

3.7 Control or Measure Parameter

 To change the displayed parameter:

Value parameters - Press the parameter key

e.g., press SPEED/Qc to display airspeed.

Rate parameter - Press the associated parameter key followed by the rate

key for that channel. e.g., display airspeed rate, press SPEED/Qc then RATE. ROC/Ps Rate may be directly pressed without first pressing ALT/Ps.

Note: The displayed parameters depend on the last keys pressed.

 To display two parameters:

 Press each value parameter in turn.

e.g., display altitude and airspeed together, press ALT/Ps then SPEED/Qc.

 In control mode, an arrow, at the right-hand end of the aim value, indicates

the last parameter selected. This can be changed by entering a new value.

 To display a value parameter together with its rate:

 Press the parameter key followed by the associated rate key.

e.g., display airspeed and rate of speed together, press SPEED/Qc then RATE. See Rate set-up for display details.

Note: If ROC/Ps Rate is pressed, the display automatically shows ALT and ROC.

Aim

 A new aim can be entered using the numeric keys. Each digit is displayed as it is

pressed. The existing aim is replaced when the first digit of the new aim is pressed. If an error is made during the entry of data, press CLEAR/QUIT to restore the original aim.

 Press ENTER to action the new aim.

Note 1: The 000 key can be used as a quick way of entering thousands.

Note 2: The ADTS 405 must be in control mode to enter a new aim (current aim

displayed). If the aim field shows "Leak Measure" press LEAK MEASURE/ CONTROL to enter control mode.

Page 46

K114 Issue No. 9

3 - 12 Operation

3.8 Leak Testing the ADTS 405

 It is important to check that the ADTS 405 and the connecting equipment does not

leak. Before use a leak check should be carried out as follows:

 Connect the pitot and static hoses (to front panel of ADTS 405F). Temporarily seal the

free ends of the hoses.

 Set the display to dual display, see 3.9.

 Set the units to feet and knots, see 3.13.

 Using the SETUP menu, choose the limits set for the aircraft or UUT, see 3.14.

 Press SETUP, [LIMITS], and [NEXT] repeatedly to select the limit set from those

available.

 Press [SEL] to save and then press CLEAR/QUIT repeatedly until the main

pressure screen shown below is displayed.

Note:

The numeric value of the parameters displayed change with each power-up sequence. The amount of change depends on local atmospheric pressure conditions at the time of power-up.

FIGURE 3-2 MAIN PRESSURE DISPLAY (LEAK MEASURE MODE)

 Press the LEAK MEASURE/CONTROL key to turn on the pressure controllers.

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 To apply an altitude of 5000 ft at a rate of climb of 6000 ft/min and an airspeed of 300

kts at a rate of 600 kts/min press the following keys:

 SPEED/Qc then RATE to select rate of change of speed.  6, 0, 0, ENTER to set the rate.  SPEED/Qc to select airspeed.  3, 0, 0, ENTER to set an airspeed of 300 kts (airspeed [CAS] now starts increasing).  ROC/Ps Rate to select rate of climb.  6, 0, 0, 0, ENTER to set the rate of climb.  ALT/Ps to select the altitude.  5, 0, 0, 0, ENTER to set altitude (altitude [Alt] now starts increasing).  SPEED/Qc to view altitude and airspeed together.

Note:

When altitude and airspeed are changing at the same time, and automatic airspeed rate is enabled, the system automatically adjusts the airspeed rate so that the aim points are reached at the same time. The airspeed rate will not exceed the entered aim value.

 Wait for the aim values to be achieved.

 Observe over a period of 1 minute that the value of Alt stays within ±10 ft and

the value of CAS with ±1 kt.

FIGURE 3-3 MAIN PRESSURE DISPLAY (CONTROL MODE)

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3 - 14 Operation

Leak Measure

Note: Compressing a gas generates heat. Gas heated or cooled in an enclosed volume causes

a pressure change. It is important, especially for leak testing, to allow enough time for the heated gas to cool and the pressure to stabilize.

 Press LEAK MEASURE/CONTROL to return to Leak Measure mode.

 Press RATE TIMER, F3 - [Wait 05:00, Time 01:00].

Note: Different wait and time periods can be selected by pressing F1 or F2.

 Wait until rate timer has completed and the results displayed.

 Check rate of climb is less than ±100 ft/min and rate of airspeed (CAS) is less

than ±1 kt.

 Press LEAK MEASURE/CONTROL to return to Control mode.

 Press GROUND, F1, [Go to Ground].

 Wait until for the display shows Safe At Ground.

 After a successful leak test, the ADTS 405 is now ready to be connected to an aircraft

system or unit under test.

 After an unsuccessful, first-time leak test, leave the system to achieve thermal stability

for a further five minutes, press CLEAR/QUIT and repeat the leak test. If the leak test is now successful, the ADTS 405 is now ready to be connected to an aircraft system or unit under test.

 After another unsuccessful leak test, disconnect both hoses, check the condition of the

o-rings on the Ps and Pt connectors as detailed in the maintenance section and firmly replace the blanking caps. Press CLEAR/QUIT and repeat the leak test procedure.

 After a successful leak test without hoses connected, replace or repair the faulty

hose(s) and retest. If the ADTS 405 fails the leak test without hoses connected, switch off and return the unit to the repair depot.

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3.9 Displays (Fig 3.4, Fig 3.5 and Fig 3.6)

 The display normally shows pressures and rates or aeronautical equivalents.

It can be set-up to show, at the same time, one parameter (single), two parameters (dual) or three parameters (triple). The ADTS 405 automatically returns to the pressure display if left inactive in any set-up or menu type display for a period of more than one minute.

 The triple display always shows altitude and airspeed; with pressure units selected, the

display always shows Ps and either Qc, Pt or EPR. When ALT or CAS are selected the display shows the aim and measured values of ALT and CAS as a dual display. With any other selected parameter the display shows the measured values of altitude and airspeed and, the aim and measured value of the other selected parameter.

 Additional display modes are available for options.

FIGURE 3-4 SINGLE DISPLAY

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FIGURE 3-6 TRIPLE DISPLAY

FIGURE 3-5 DUAL DISPLAY

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3.10 Rate Timer Displays (Fig 3.7 and Fig 3.8)

 When in Leak Measure mode and, after completing a rate timing, the system generates

the rate timer displays. These displays do not depend on the display mode (single, dual, triple or option). Pressing a parameter key (ALT, ROC, etc.,) or CLEAR/QUIT exits the rate timer displays.

FIGURE 3-7 RATE TIMER DISPLAY AERONAUTICAL UNITS

FIGURE 3-8 RATE TIMER DISPLAY PRESSURE UNITS

Note: There is no pointer for the primary parameter, values cannot be entered in

the rate timer displays.

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3 - 18 Operation

3.11 Pt Only Display (Fig 3.8)

 The Pt only display overrides the other display modes (single, dual and triple). The

measured altitude and the CAS are produced from Ps in measure mode.

FIGURE 3-9 PT ONLY DISPLAY

3.12 Changing the Display

 The display can show either one, two or three parameters as follows:

Note: Display cannot be changed with SETUP switched off or in minimum mode.

 To change the display:

 Press SETUP.  Select [MORE].  Select [DISPLAYS/OPTIONS].  Select [DISPLAY TYPE].  Using [NEXT] or [PREV].  Select either SINGLE, DUAL or TRIPLE, ARINC, ENCODER

(more display types with options fitted).

 Press [SAVE] to accept.  Press CLEAR/QUIT repeatedly to return to user display.

 To change the display for Pt Only:

 Press SETUP.  Select [MORE].  Select [Control], [Ps Pt Dual].  Select [Pt Only Mode].  Press CLEAR/QUIT repeatedly to return to user display.

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3.13 Changing the Units

 The units can be changed to units of pressure measurement or aeronautical units.

 In Full Set-up Mode any set of aeronautical or pressure units can be selected.

 To change the units:

 Press the SETUP key.  Select [UNITS].  Use [NEXT] and [PREV] keys to select the required units.  Select [SAVE] to accept.  Press CLEAR/QUIT repeatedly to return to the main pressure display.

 In Minimum Setup Mode only the default aeronautical and pressure units can be

selected.

 To change the unit type:

 Press the SETUP key.  Select [UNITS TYPE].  Select either [AERO] or [PRESS] to select the unit type.  Select [SAVE] to accept.  Press CLEAR/QUIT repeatedly to return to the main pressure display.

Note: The default pressure and aeronautical units are defined in the CONFIGuration

mode.

 If Set-up Mode is switched off, units cannot be changed.

3.14 Limit Checking

 The system checks all data entered against minimum and maximum limits set for the

particular limit set in use. If these limits are exceeded, the data entry is ignored and a warning message displayed showing the minimum and maximum values that can be entered. The system also checks all limits of associated parameters. If these limits are exceeded when a new value is entered, the display shows the name of the associated parameter. e.g., If a Mach limit is exceeded when entering an airspeed value the display shows "Mach" and the equivalent maximum and minimum limits as airspeed values. Similarly, if an ARINC 565 limit is exceeded when entering a value and, ARINC limits are enabled, the display shows `ARINC'.

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3 - 20 Operation

 Using the SETUP function, previously stored sets of limits can be recalled for use. Each

set of limits is stored under an aircraft name. Three pre-defined sets of limits “Standard“, “Civil“ and “Max“ limits are supplied with the ADTS 405.

Note: The ADTS 405, when delivered, contains "Standard" and "Civil" limits; to set and store

"Max" limits, for the first time, enter configuration. The "Max" limits depend on the range of the pitot channel either 850 or 1000 knots, see section 1.3, operating limits.

To select the limits in use:

 Press SETUP.  Select [LIMITS].  Use [NEXT] or [PREV] to select the limits required. Each set of limits

is identified by its name, including the pre-defined sets of limits (“Standard“, “Civil“ and "Max" see section 1.3, operating limits).

 Select [SEL] to select the limits.  Press QUIT/CLEAR to return to the pressure display.

 Using the CONFIGuration function, new sets of limits can be created and existing sets of

limits can be edited. In addition, the set of limits in use at power-up can be selected. If required, this selection can be locked to prevent unauthorised changing of the limits.

Auto recovery facilities

 The pressure controllers in the ADTS 405 can "feed" a leak in an aircraft system. When

first testing an aircraft system, a leak test must be carried out at low altitude and airspeed.

 If, during a leak test, a leak in the system produces a rate of climb greater than the rate

set in limits or a rate of change of airspeed greater than the rate set in limits, then the pressure controllers automatically regain control to minimise damage to the aircraft system. This AUTO LEAK RECOVERY facility can be disabled.

 If a leak causes the system pressures to exceed any limit during a leak test, the

pressure controllers automatically regain control. This AUTO LIMIT RECOVERY system can be disabled.

 If negative airspeed (or Qc) occurs in measure mode, the zero value is automatically

opened for one second to balance the airspeed. This only applies when the minimum CAS (or Qc) limit is zero.

 Limits cannot be changed with SETUP switched off or Limit Lock enabled.

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Aircraft System Protection

 The ADTS 405 protects the aircraft system against user error and leaks in the aircraft

system.

Note: The pumps must be switched on.

The system protection operates:



Limit checking of user entered set-points.



Automatic regain of control if leak rate is over limit during leak testing.



Automatic regain of control if a leak takes the system pressures outside of limits.

Mach Test and Constant Mach

 To go to 0.8 Mach, enter Control Mode and proceed as follows:

 Press SPEED then RATE to select rate of change of airspeed.  Enter required rate, e.g. 300 kts/min.  Press MACH.  Enter 0.8.  Wait for the Mach to be achieved.

Note: If the altitude changes the system automatically adjusts the airspeed to

keep the Mach value constant.

True Airspeed

 The normal airspeed parameter is Calibrated Airspeed (CAS) (equivalent to IAS for

testing purposes).

 The airspeed parameter may be changed to True Airspeed (TAS) as follows:

 Press SETUP then SPEED.  Select [CAS/TAS].  Select [TAS].  Press QUIT/CLEAR repeatedly to exit set-up.  Press SPEED.

 The display now shows the airspeed parameter as TAS.

Note: Airspeed parameter type can only be changed in Full Set-up mode. Rate of

change of airspeed will still be shown as Rate CAS.

 Pitot temperature (Tt) is used in the calculation of TAS. To enter Tt:

 Press SETUP.  Press SPEED.  Select [Pt TEMPERATURE].  Enter the temperature measured by the aircraft's Pitot temperature sensor.  Press QUIT/CLEAR three times to return to user display.

Note: Pitot temperature can only be changed in Full Set-up mode.

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Airspeed Switch test

 The following example shows how an airspeed switch an be functionally checked.

Note: For low airspeed switches (i.e. 130 knots) the Pt Only facility could be used.

 Press LEAK MEASURE/CONTROL to enter control mode. Press SPEED/Qc.

 If necessary, press RATE and enter a change of airspeed low enough to observe switch

operation.

 Enter an Aim value below the operating limits of the switch (i.e., airspeed switch

operating at 130 knots ±2 knots set 127 knots).

 Press ENTER and observe the airspeed changing.

 Using the nudge facility, set to an appropriate step value, increase the Aim value.

 Increase the Aim until the switch operates (contacts close) and record the value.

 Change the Aim to above the airspeed operating range (i.e. 133 knots). Repeat the

steps, decreasing the Aim value until the airspeed switch operates (contacts open) and record value.

 This procedure can be repeated. If many operations of a switch are required use the

oscillating facility detailed in Full Set-up. The above method can be used for the other parameters:

Examples:

Altitude switch - low altitude warning

- landing gear configuration warning

- height lock

Mach switch - Speed brake scheduling

- Mach cruise lock

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Engine Pressure Ratio (EPR)

 The ADTS 405 may be used to check EPR sensors and indicators. Use Ps for INLET

pressure and Pt for OUTLET pressure.

 To carry out an EPR check, the display must be showing pressure units e.g., mbar or

inHg.

 To change units in FULL SETUP Mode:

 PressSETUP.  Select [UNITS].  Select required pressure units for display using [NEXT], [PREV] and [SAVE].  Use CLEAR/QUIT to return to pressure display.

 To change units in MINIMUM SETUP Mode:

 Press SETUP.  Select [UNITS TYPE].  Select [PRESS].  Use CLEAR/QUIT to return to the main pressure display. Pressure units cannot

be selected when set-up mode is switched off.

 To enter an EPR of 1.8 with inlet pressure of 500 mbar (15 inHg), proceed as follows:

 If the display shows “Leak Measure”, press LEAK MEASURE/CONTROL to regain

control.

Note: The pressure/vacuum pumps must be switched on.

 Press ROC/Ps RATE to select rate of change of static.  Enter required rate of change e.g., 1000 mbar/min, (30 inHg/min).  Press EPR then RATE to select EPR rate.  Enter required value e.g., 5 EPR/min and press ENTER.  Press ALT/Ps.  Enter 500 mbar (15 inHg) and press ENTER.  Press EPR.  Enter 1.8 and press ENTER.  An EPR of 1.8 will quickly be achieved.

Note: EPR testing can also be performed by specifying the actual INLET and OUTLET

values.

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3.15 Testing Aircraft Systems or UUT

WARNING: OBSERVE THE APPROPRIATE SAFETY INSTRUCTIONS AND PROCEDURES

DETAILED IN THE AIRCRAFT MAINTENANCE MANUALS OR COMPONENT MAINTENANCE MANUALS.

 Connect the hoses and appropriate adaptors to the aircraft system or UUT.

 To make sure that the connections to the aircraft system or UUT are not leaking carry

out a leak test detailed in the appropriate aircraft or component manual.

3.15.1 Go To Ground and Shut-down

 On completion of testing and, before disconnecting from the aircraft system or UUT,

the pressures in the system must be taken to the local atmospheric pressure (ground) with zero airspeed.

 If the display shows "Leak Measure", press LEAK MEASURE/CONTROL.  Press GROUND, F1, [Go To Ground].  Wait for the display to show "Safe At Ground". It is now safe to

disconnect the aircraft system or UUT.

 The pressure in the system changes towards ground. The ground pressure or "Ground"

replaces the static or altitude aim value.

 If required, new rates of change can be entered while going to ground.  To change the ROC or static rate, press ROC/Ps Rate and enter the new value.  To change the airspeed or Qc rate, press SPEED/Qc then RATE and enter the new

value.

 To change from going to ground, enter a new altitude (static) or airspeed (Qc) set-point.  When the airspeed reaches zero and the Ps channel pressure nears ground, the

system re-measures atmospheric pressure to update the recorded ground pressure (QFE). During this period, the display shows the message "Checking Ground". The ADTS 405 then reconnects to the aircraft system and equalises the system pressures. Commands cannot be entered when these two messages are displayed.

 The Ps channel pressure is then taken to the new recorded atmospheric pressure and,

at this new pressure, the display shows the message “Safe At Ground”. The ground vent and zero valves remain open to keep the aircraft system vented to atmosphere.

 Press CLEAR/QUIT to continue with normal operation. The ground vent and zero

valves automatically close.

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3.16 Options

WARNINGS:

1. COMPLY WITH ALL LOCAL SAFETY ORDERS.

2. OBSERVE ALL SAFETY PROCEDURES IN THE AIRCRAFT MAINTENANCE MANUALS.

SCPI IEEE 488 Option

The SCPI IEEE 488 interface provides remote control of the ADTS 405 from a suitable PC, using standardised commands.

The ADTS 405 implements the full SCPI command set with the exception of expressions and units suffixes. Although all the ADTS 405 commands at the first, or root, level are fully defined in the SCPI standard, many of the functions required have not been allowed for in the standard. The lower levels of commands have been created using the appropriate rules contained within the standard.

Druck publication K157 SCPI User Manual provides details of command codes, command syntax and examples of programming. Section 5 of this manual details a test procedure for the option.

Altimeter Encoder Option

The Altimeter Encoder Option allows the output from encoder altimeters to be displayed on either the hand terminal or display and key-pad of the unit. The displayed data includes the bit pattern and the equivalent altitude decoded from the bit pattern. The unit supplies 24 VDC to power the altimeter encoder electronics circuit and the altimeter vibrator circuit.

Druck publication K170 Altimeter Encoder Option User Manual provides details of displayed and encoded data. Section 5 of this manual details a test procedure for the option.

ARINC 429 Option

The ARINC 429 Interface provides the ADTS 405 with the ability to continuously transmit all internal aeronautical and pressure measurement parameters. Through an appropriate connector, the ADTS 405 can transmit the measurement parameters to the aircraft systems. The ADTS 405 can also monitor the aircraft ARINC 429 bus and display the measurement data on the hand terminal or the front panel display. The labels used for transmitting and receiving each parameter conform to the standard 429 specification.

Druck publication K185 ARINC 429 Option User Manual provides details of parameters and data output. Section 5 of this manual details a test procedure for the option.

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3.17 SETUP and CONFIGuration

 The SETUP key provides access to secondary functions using a menu system, extends

the keyboard and allows many of the ADTS 405 functions to be customised. All changes made under SETUP are temporary and will be lost when the system is switched off. The range of options allowed in set-up is determined by the set-up mode.

 Holding down the F1 key while pressing SETUP provides access to the CONFIGuration

mode. CONFIGuration is similar to SETUP with many identical functions. The changes made under CONFIGuration are permanent and remain set after the system is switched off. CONFIGuration can be used to change the power-up default settings of the ADTS 405 functions.

Note: Access to the CONFIGuration mode may be protected by a PIN.

3.18 Quick Reference

The quick reference charts show full set-up, minimum set-up and configuration functions. In the key/selection column the following applies:

The display shows the main pressure display (Leak Measure or Control mode).

Set-up example

Press SETUP and the display shows:

Pressing a function key (F1 to F4) enters the set-up menu.

When in set-up, pressing a key (ALT Ps in this example) enters a menu or setting that applies to the parameter.

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FULL SET-UP

Key/selection Function and comments

SETUP

[UNITS]

[NEXT] [PREV] [SAVE]

[LIMITS]

[NEXT] [PREV] [SEL]

[OSC]

[Ps]

[START] [STOP] [FREEZE] [AMPL/FREQ]

[AMPL]

Data Entry

[FREQ]

Data Entry

[Pt]

[MORE]

[CONTROL]

[Ps Pt DUAL]

[DISPLAYS/OPTIONS]

[DISPLAY TYPE]

[NEXT] [PREV] [SAVE]

[OPTIONS] [CLOSE O/P VALVES] [OPEN O/P VALVES] [SYSTEM SELF TEST]

SETUP + KEY PRESS

ALT

data entry

SPEED

[AUTO ZERO]

[ON]

[OFF] [CAS/TAS]

[CAS]

[TAS] [Pt TEMPERATURE]

data entry

MACH

[DEFAULT] [OFF] [ON]

data entry

As for Ps channel

See option manual Close output valves Open output valves Start self test

Full or minimum set-up selected in configuration. Select units Step through available units Step back through available units Select displayed units Select set of limits (aircraft 1\aircraft 2 ...) As NEXT, in reverse order Select displayed limit set Oscillate about aim For Ps channel

Select single, dual or triple display (SINGLE\DUAL\TRIPLE\ENCODER\ARINC429) As NEXT, reverse order Save displayed Display Type

Auto zero function

Altitude correction value

Calibrated or true airspeed

Mach limit Defined by current limits Removes Mach limit Enables Mach limit Enter new Mach limit

Temperature for true airspeed Enter Pitot temperature

SETUP contd...

c e

Selects Ps only, Pt only or Dual channel control

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3 - 28 Operation

FULL SET-UP (contd.)

Key/selection Function and comments

SETUP contd... RATE TIME

[WAIT/TIME ON F1]

[TIME]

[WAIT]

data entry

[WAIT TIME F2]

[WAIT TIME F3]

RATE

[ON] [OFF]

LEAK MEASURE

[AUTO LEAK]

[ON] [OFF]

[AUTO LIMIT]

[ON] [OFF]

GROUND

data entry

PORT

REMOTE

[DATE/TIME]

[DATE]

data entry

[TIME]

data entry

HELP

(Nudge UP)

[NEXT]

data entry

[PREV]

data entry

(Nudge DOWN )

Automatic airspeed rate

Automatic

Manual

Auto leak recovery on or off

Auto limit recovery on or off

Airfield altitude for QNH display

See Line Switching Unit User Manual

Remote mode lock, see configuration

Adjust date and time

Enter Time

Help on SETUP

Enter nudge values (ALT \ CAS / TAS \ MACH \ ROC \ RATE \ RATE CAS) Aeronautical units or (Ps \ Pt \ Qc \ EPR \ RATE Ps \ RATE Qc \ RATE EPR) Pressure units As NEXT, in reverse order Required nudge increment As Nudge UP

Set-up WAIT and TIME time periods For F1 Change to TIME Change to WAIT of TIME time of WAIT time See [Wait/Time on F1]

See [Wait/Time on F1]

Enter Date

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MINIMUM SET-UP

Key/selection Function and comments

SETUP

[UNITS TYPE]

[AERO] [PRESS]

[LIMITS]

[NEXT] [PREV] [SEL]

ALT

data entry

PORT

HELP

EXECUTE TEST PROGRAM

[PRINT/SAVE]

[PRINT] [SAVE]

[PRINT FILE]

[NEXT] [PREV] [PRN]

Full or minimum set-up selected in configuration. Set units type Set units to default aeronautical units Set units to default pressure units

Select set of limits (aircraft 1\aircraft 2 ...) As NEXT, in reverse order Select displayed limit set

Altitude correction value

See option user manual

Help on set-up

Result file related print option Print/save mode selection Print generated result data Save generated result data to file Print result file option Select next result file Select previous result file Print selected result file

R e

r e n

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3 - 30 Operation

CONFIGURATION Key/selection Function and comments

SETUP + F1

[UNITS]

[AERONAUTICAL]

[NEXT] [PREV] [SAVE]

[PRESSURE]

[NEXT] [PREV] [SAVE]

[TEMPERATURE]

[C] [F]

[LIMITS]

[EDIT LIMITS]

[EDIT EXISTING]

[NEXT] [PREV] [SEL]

[NEXT]

[PREV] [ON/OFF] data entry [ALPHA]

[BACK] [MAX LIMITS] [EDIT NEW]

[CLEAR LIMITS]

[NEXT] [PREV] [SEL]

[YES] [NO]

[LOCK AIRCRAFT]

[ON] [OFF]

[DEFAULT AIRCRAFT]

[NEXT] [PREV] [SEL]

SETUP + F1 contd...

Hold F1 and press SETUP to enter CONFIG Default units Select default aeronautical units Step through available units Step back through available units Save selected units

Configure sets of limits Change limit values Change existing values (aircraft 1 \ aircraft 2 ..._ As NEXT, in reverse order Select aircraft to EDIT limits NAME \ MAX ALT \ MIN ALT \ MAX CAS \ MIN CAS \ MAX MACH \ MAX ROC \ MAX RATE CAS \ MIN Ps \ MAX Ps \ MIN Qc \ MAX Qc \ MAX RATE Ps \MAX RATE Qc \ ARINC LIMITS \ ALTITUDE CORRECTION As NEXT in reverse order Switch (toggle) to ARINC 565 limits Limit value Insert alphabet character in name Nudge up select next letter in alphabet Nudge down select previous letter in alphabet Delete last character in name Create maximum limits called "MAX"

Select default pressure units Step through available units Step back through available units Save selected units Select default temperature units

C F

Create new limits As for [EDIT EXISTING][SEL] above Clear an existing set of limits (aircraft 1 \ aircraft 2 ...) As NEXT, in reverse order Clear selected limits Confirm delete

Only DEFAULT limits available in USER mode SETUP can be used to select aircraft

(aircraft 1 \ aircraft 2 ...) As NEXT, in reverse order Select aircraft limits used at power-up. May be locked

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Key/selection Function and comments

CONFIG (SETUP + F1) contd...

[MORE]

[CONTROL]

[Ps Pt DUAL]

[DISPLAY/OPTIONS]

[DISPLAY TYPE]

[NEXT] [PREV] [SAVE]

[OPTIONS]

[DATE FORMAT]

[DMY] [MDY]

[SETUP MODE]

[OFF] [MIN] [FULL]

CONFIG (SETUP + F1) + KEY PRESS

SPEED

[AUTO ZERO]

[ON]

[OFF]

[CAS/TAS]

[CAS]

[TAS]

[Pt TEMPERATURE]

data entry

RATE TIME

[WAIT/TIME ON F1]

[TIME]

[WAIT]

data entry

[WAIT/TIME ON F2] [WAIT/TIME ON F3]

RATE

[ON] [OFF]

LEAK MEASURE

[AUTO LEAK ON/OFF]

[ON]

[OFF]

[AUTO LEAK LOCK]

[ON]

[OFF]

[AUTO LIMIT ON/OFF]

[ON]

[OFF]

[AUTO LIMIT LOCK]

[ON]

[OFF]

Lock auto limit recovery state

Lock auto leak recovery Lock

Auto limit recovery state

Auto leak recovery Lock

Configure WAIT and TIME times For F1 Change to TIME Change to WAIT TIME time period WAIT time period See [Wait/Time on F1] See [Wait/Time on F1]

Configure Calibrated or True airspeed

Auto zero function

Configure Pt temperature

Automatic airspeed rate Automatic Manual

CONFIG (SETUP + F1) + KEY PRESS contd...

Ps Pt DUAL control Ps single pipe testing of altimeters. Pt single pipe testing of airspeed and Mach indicators. DUAL normal combined system testing.

Configure display type (SINGLE\DUAL\TRIPLE\ENCODER\ARINC429) As NEXT, in reverse order Save selection

See option manual Format of date text UK format DD/MM/YY US format MM/DD/YY

Limits access to set-up functions

R e

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c e

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Key/selection Function and comments

CONFIG (SETUP + F1) + KEY PRESS contd...

GROUND

data entry

PORT

REMOTE

[ON] [OFF]

ETP

AUTO RUN

[NEXT] [PREV] [NONE] [SEL]

ERASE PROGRAMS

[NEXT] [PREV] [DEL]

RESULTS

[PRINT/SAVE]

[PRINT] [SAVE]

[ERASE FILE]

[NEXT] [PREV] [DEL]

(nudge up)

[NEXT] [PREV]

data entry

(nudge down)

[000]

data entry

(ALT\CAS/TAS\MACH\ROC\RATE CAS\Ps\Pt\Qc\EPR\RATE Ps\RATE Qc\RATE EPR) As NEXT, in reverse order Required nudge increment

As nudge up

Delete test program

PIN protection PIN (code number to enter CONFIG) set to 0000 for "no code required"

Refer to option user manual

Run test program on power up

Airfield altitude for QNH display

Remote mode lock

Print/Save mode selection Generated result data printed Generated result data saved in a file Result file delete option Select next result file Select previous result file Delete selected result file

Page 67

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Druck ADTS 405 User Manual

K114 Issue No. 9

4 Maintenance

4.1 Introduction

This section details the maintenance tasks to be carried out by the operator. The maintenance chart shows the maintenance tasks, the periodicity of each task and a code referenced to the task detailed in 4.3.

* Periodicity may change depending on usage and environment, refer to the Engineering Authority.

ksaT edoC doireP

tcepsnIA .esuerofeb,yliaD

tcepsnIBylkeeW

tseTC.esuerofeB

tseTD .esuerofeb,yliaD

etarbilaCE *shtnom21yrevE

ecalpeRF .

noitcepsniretfadeliatednehwrognidniftluafnideliatedsA

naelCG*ylkeeW

ecivreSH

rotacidniemitdespaletinupmupeh

tybdedrocersruoh000,1

.golgninnurtnempiuqeehtro

ecivreSJ

rotacidniemitdespaletinupmupehtybdedrocersruoh00

0,3

.golgninnurtnempiuqeehtro

TABLE 4-1 MAINTENANCE CHART

Page 68

K114 Issue No. 9

4 - 2

Maintenance

TABLE 4-2 MATERIALS LIST

metI

rebmuN

noitpircseD,emaNmetI

1eerF-tniL,nottoC,htolC

2)AedarG,82401-A-LIM(lyporposI,lohoclA

3diuqiL,dliM,tnegreteD

17834-B-LIM(eltsirb-tfoS,hsurB

Note: Equivalent substitutes can be used.

TABLE 4-3 TOOL AND TEST EQUIPMENT REQUIREMENTS

)1(

edoCfeR

)2(

erutalcnemoN

)3(

s’rerutcafunaM

rebmuntrap

1latigiD,retemtloV1927H77epyT,IIseiresekulF

2V052,retseTnoitalusnIniboR

Note: Equivalent substitutes can be used.

4.2 Materials

This lists materials required for the user to maintain the ADTS 405. The item number and name in the table identifies the item in the maintenance tasks (for example, "Use a soft bristle brush, item 4, Table 4-2").

The description provides further information required to identify the item.

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Druck ADTS 405 User Manual

K114 Issue No. 9

4.3 Maintenance Tasks

A Visually inspect the unit for obvious signs of damage and check that all the equipment

is present; record any deficiencies.

B Visually inspect the pneumatic output connectors for damage. Inspect the small o-ring

on each pneumatic output connector for cuts and any signs of wear; if necessary, replace as detailed in 4.4. Visually inspect pneumatic hoses, electrical cables for cuts, splits and damage; replace as necessary.

C Before use, power-up the unit as detailed in Section 3. Check the date of the last

calibration and, if necessary, refer to task E. Record any error messages and refer to Section 5.

D Daily and before use, carry out the SST detailed in Section 5.

E Normal calibration period 12 months. When calibration is due, the unit should be

withdrawn from service and returned to depot or calibration facility. The date of calibration is stored in the unit and displayed in the power-up sequence and on a label on the front panel. Do not use a unit with out-of-date calibration. Engineering authority may change the periodicity of calibration depending on usage and the operating environment.

F As detailed in fault finding or when detailed after inspection replace the listed item in

table 2-1.

G Clean the unit every week. Clean the front panel with a damp lint-free cloth (item 1,

Table 4-2) and mild liquid detergent (item 3, Table 4-2). Remove any stubborn dirt using isopropyl alcohol (item 2, Table 4-2) and allow to dry. Clean all pneumatic connectors with a soft brush (item 4, Table 4-2). Remove any stubborn dirt using isopropyl alcohol (item 2, Table 4-2) and allow to dry.

H Withdraw the unit from service and return to the repair depot. The intermediate

service manual contains the 1,000 hour servicing procedure.

J Withdraw the unit from service and return to the repair depot. The intermediate

service manual contains the 3,000 hour servicing procedure.

Page 70

K114 Issue No. 9

4 - 4

Maintenance

4.4 Routine Maintenance

WARNING: S

WITCH OFF AND DISCONNECT THE POWER SUPPLY BEFORE STARTING ANY MAINTENANCE TASK.

Carrying out the maintenance tasks detailed 4.3.

Servicing Procedures

The following procedures provide instructions to test and replace items for the operator. Return the unit to the intermediate service depot for further testing and replacement of items.

Replacing the output connector o-ring

After inspection as detailed in maintenance task B, carry out the following if the o-ring is worn or damaged:

Carefully remove the o-ring from the small groove at the top of the connector.

Fit a new o-ring in the small groove at the top of the connector.

Make sure the o-ring is tight in the groove and not damaged after fitting.

Note: Damage to this o-ring causes leaks.

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Druck ADTS 405 User Manual

K114 Issue No. 9

Cable tests Carry out the following check when detailed in Testing and Fault Finding, Section 5.

Measure continuity using the DVM (item 1, Table 4-3) set to an appropriate range.

Measure the continuity between corresponding pins at each end of each cable assembly. The measured resistance must not exceed 2.0 ohms.

Note: This resistance value is the expected maximum value for the 18 metre (60ft) cable.

The resistance value varies depending on the length of the cable.

Measure insulation using the Insulation tester (item 2, Table 4-3), set to an appropriate range.

Measure the insulation resistance between the shell of the connector and all individual pins in turn.

Measure the insulation resistance between the shell of the appropriate connectors and all pins in turn.

Measure also the resistance between individual pairs of pins (i.e., 1-2, 1-3, 1-4, 1-5, 1-6, 2-3, 2-4, 2-5, 2-6, 3-4, 3-5, 3-6, 4-5, 4-6 and 5-6). In all cases the resistance must exceed 10 Mohms.

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K114 Issue No. 9

4 - 6

Maintenance

INTENTIONALLY LEFT BLANK

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K114 Issue No. 9

Druck ADTS 405 User Manual

5 - 1

5 TESTING AND FAULT FINDING

5.1 Introduction

 The ADTS 405 contains a built-in, self-test and diagnostic system. The system

continuously monitors the performance of the unit and at power-up carries out a selftest. Warning and error messages are displayed during normal operation if out of range values are entered or if faults occur.

 This section details the standard serviceability test and the possible error messages

and codes that can be displayed. A fault diagnosis flow chart and table provide the probable cause and procedures to rectify specific symptoms.

Error messages

 When the display shows a message indicating entry of incorrect data or values,

pressing QUIT clears the message and allows the correct entry to be made.

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K114 Issue No. 9

5 - 2

Testing and Fault Finding

5.2 Standard Serviceability Test

 The following procedure can be used to check the functions and facilities of the ADTS

405. For further information refer to Section 6 - Reference and Specification.

 In the following:

 All key presses are highlighted in bold and shown as identified on the key-pad.

 Key presses inside brackets e.g., [MORE], are soft key presses (i.e., function key

selections {F1 to F4} indicated on the display screen).

Procedure

 Connection and power-on checks

 Connect power to the unit and, if necessary, connect the hand terminal.

Make sure that the blanking caps are fitted to the Ps and Pt front panel outputs. Check power indicator is on.

 Set the front panel switch to OPERATE. Set the front panel switch for the pump

unit to PUMP ON and check that the pump power indicator lights.

 Check the display shows the first stage power-up message as below (where: x is

the version number of the installed display driver software):

 Check the second stage power-up message displays as below (where: x is the

version number of the installed main operating software):

Note: "ADTS 405" may be replaced by an alternative identity string. The software version may

also be supplemented by extra alpha characters.

DRUCK

ADTS 405

DK 263

VER 6.xx

DK 282 Version x.xx Display Power up Please Wait

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K114 Issue No. 9

Druck ADTS 405 User Manual

5 - 3

 The ADTS 405 displays any detected errors. Check that the power-up sequence

continues through the following stages without error:

 Calibration date.  Self-test.  Measuring ground pressures.  Equalizing system pressures.

 Check that the display then changes to show measured altitude and airspeed (CAS or

TAS) values.

NOTES

1 The displayed values change as atmospheric pressure changes at power-up.

2 The display shows the “WARMUP” message in the lower right corner indicating

that full pressure accuracy and stability may not be achieved. The WARMUP message clears after 15 minutes. This indication does not inhibit operation and these tests may proceed without waiting for the message to clear.

3 An automatic zero (if enabled) takes place regularly. The display shows “ZERO”

and the state of the valves, on the mimic panel, change for approximately six seconds. Commands may still be entered while auto-zero takes place.

 Press the MACH key and check the display changes to show Altitude and Mach

measured values.

Pump unit

 Set the front panel switch for the pump unit to PUMP ON and check that the pump

power indicator lights.

 Press LEAK MEASURE/CONTROL to go to control mode. Enter an altitude aim of 5000

ft by pressing 5, 0, 0, 0, ENTER.

 Enter rate or use default rates.

 Enter an airspeed aim of 500 knots by pressing SPEED, 5, 0, 0, ENTER.

 Check that these aim values are achieved.

Completion  On successful completion of this test procedure, select GROUND, [Go to Ground] wait

until the unit is at ground, switch off and disconnect the power supply.

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K114 Issue No. 9

5 - 4

Testing and Fault Finding

5.3 Self-Test Errors

 At power-up, the ADTS 405 indicates if there is a fault by displaying an error code for

example:

701:HHHH PS SELF-TEST ERROR

 The HHHH is a hexadecimal code containing additional information record the whole

error code.

 Paragraph 5.8 contains a table listing the error codes, check that the error code is

complete and listed in the table before returning the unit to the repair depot.

5.4 Venting after Overpressure

 To calibrate or test the ADTS 405, an external pressure source is connected to the Ps

and/or Pt output connectors. If, during calibration or test procedures, an overpressure occurs, the output valves close to protect the system. After the valves close pressure may be trapped in the internal system; the display may show on the next power-up error 701:0100 or 702:0100. The following procedure to vent this pressure enters the maintenance mode. Review and become familiar with the whole procedure before beginning the venting process:

1. Remove the source of pressure and vent Ps and Pt to atmosphere (caps off).

CAUTION:ONLY SELECT ITEMS DETAILED IN THE FOLLOWING MENUS, INCORRECT SELECTIONS CAN CAUSE

CHANGES

TO SAFETY LIMITS AND THE CALIBRATION DATA OF THE SYSTEM.

2. Re-power the ADTS 405. During the power-up screen:

DRUCK

ADTS 405

DK XXX

VER XXX

3. Press F1 and F4 simultaneously. The ADTS 405 enters the maintenance mode with the following screen displays.

Note: The system may prompt for a PIN. This is not the CONFIG PIN but the Calibration

PIN. If this Calibration PIN is enabled and not entered, the system will not execute the following procedure.

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5 - 5

CAUTION:ONLY SELECT ITEMS DETAILED IN THE FOLLOWING MENUS, INCORRECT SELECTIONS CAN CAUSE

CHANGES

TO SAFETY LIMITS AND THE CALIBRATION DATA OF THE SYSTEM.

4. The system enters the maintenance mode with the following screen display:

(MAINTENANCE) F1 Data Block F2 Supervisor EEPROM F3 More

5. Select F3. The display shows:

(MAINTENANCE) F1 System F2 Hardware F3 Error log

6. Select F3. The display shows:

(MAINTENANCE) F1 Vent System F2 Set System Ready F3 View Temperature

7. Select F1 and when complete, press CLEAR/QUIT three times to reset the system.

5.5 Fault Diagnosis

 If the display shows a warning or error message, refer to the above sections.

 If a fault occurs, refer to the fault location chart, Figure 5-1 and Table 5-1 for possible

fault causes and recommended action.

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K114 Issue No. 9

5 - 6

Testing and Fault Finding

FIGURE 5-1 FAULT FINDING CHART

SET POWER SWITCH

TO OPERATE

HAND-TERMINAL

FITTED

HAND-TERMINAL

FITTED

POWER

INDICATOR

FRONT PANEL

DISPLAY FITTED

STATUS LIGHT

HAND-TERMINAL

BACKLIGHT ON

F9 F2 F10

POWER-UP SEQUENCE

COMPLETED WITHOUT ERRORS.

IF ANY FURTHER ERRORS OCCUR

THE SYSTEM LOGS THE OCCURRENCE

AND DISPLAYS AN ERROR MESSAGE

STATUS LIGHT

FROM NOW ON,

REFER TO ERROR CODES FOR FAULT

FINDING PROCEDURE

IF ANY ERRORS OCCUR

THE SYSTEM LOGS THE OCCURRENCE

AND DISPLAYS AN ERROR MESSAGE

TO CONFIRM SERVICEABILITY,

CARRY OUT THE

STANDARD SERVICEABILITY TEST

FUNCTIONAL TESTING

COMPLETE

MAKE SURE POWER-UP SEQUENCE

IS COMPLETED WITHOUT ERRORS

POWER-UP

MESSAGE

HAND-TERMINAL

DISPLAY POWER-UP

MESSAGE

Power-up sequence

DK282 version xx.xx Display Power Up

Please Wait

DRUCK

ADTS 405

DK 263

Ver 6.xx

Last Calibration

mm/dd/yy (mdy)

PLEASE WAIT

RPT Transducer

Self Test

PLEASE WAIT

Measuring Ground

Pressures

PLEASE WAIT

Equalising System

Pressures

(Valves May Pulse)

PLEASE WAIT

ALT 0 ft Leak Measure CAS 0.0 kts Leak Measure

WARMUP

SYSTEM STATUS

RED

SYSTEM STATUS

ORANGE

SYSTEM STATUS

GREEN

STATUS LIGHT

F2F9

HAND-TERMINAL

FITTED

FLASHING

RED/ORANGE

GREEN

RED

OFF

FLASHING

RED/ORANGE

OFF

RED

FRONT PANEL

DISPLAY POWER-UP

MESSAGE

FRONT PANEL

DISPLAY POWER-UP

MESSAGE

FLASHING

RED/

ORANGE

GREEN

RED

OFF

F7 F2

STATUS LIGHT

FLASHING

RED/ORANGE

OFF

RED

GREEN

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Druck ADTS 405 User Manual

5 - 7

TABLE 5-1 FAULT FINDING

Fault Symptom Probable cause Action

Faulty power supply.

Unserviceable fuse, AC/DC power supply Faulty power supply cable.

Pump power-on indicator does not light.

Internal control computer fault.

Use an available hand-terminal.

Record fault and return ADTS 405 to depot for repair.

Display power-up message appears and status light remains red.

Hand-terminal fault (cable OK).

No hand-terminal display, status light green. Handterminal back- light on.

Display fault.

No front panel display power-up message, status light green.

No hand-terminal display, status light green. Handterminal back-light not on.

Hand-terminal.

Status light off.

System fault.

Status light steady orange.

No front panel display DK127 message. Status light flashing red/orange.

No front panel display detected.

Internal fault.

Remove hand-terminal and re-test.

Replace hand-terminal. Hand-terminal or hand-terminal cable fault. Record fault and return hand-terminal/cable to depot for repair.

Check power supply. Check/replace power supply fuse or reset circuit protection device. Check/replace fuse (front panel). Replace cable and re-test.

Record fault and return ADTS 405 to depot for repair.

F10

Replace hand-terminal.

Record fault and return handterminal to depot for repair.

Record fault and return ADTS 405 to depot for repair.

Internal PSU fault.

No hand-terminal or front panel display DK127 message. Status light flashing red/orange.

No hand-terminal or front panel display detected. Hand-terminal fault. Cable fault. Internal fault.

AC or DC power indicator does not light.

AC or DC power supply cable to 405 rack.

405 rack AC input fuse.

PSU fault.

Check/replace cables. Check/replace fuse. Record fault and return ADTS 405

to depot for repair.

Record fault and return ADTS 405 to depot for repair.

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5 - 8

Testing and Fault Finding

5.6 Further Testing

 The following tests should only be carried out if a pneumatic leak or a controller

instability is suspected.

Test Environment and Preliminary Operations

 These tests should be carried out in a room with a stable temperature environment

within the operating temperature range. The room must be free from drafts.

 Review and become familiar with the whole of the test procedure before beginning the

test procedure.

 The unit must be thermally stable; switch on and leave the unit for at least one hour to

achieve thermal stability.

 Change the units to mbar as follows:

(1) Press SETUP then select [UNITS]. Repeatedly select [NEXT] until the

display shows “mbar”.

(2) Select [SAVE] and then press CLEAR/QUIT twice and the display now shows Ps and Pt

in units of mbar.

Pressure Leak Check

 This section verifies that the unit is leak tight under positive pressure conditions.

(1) Press LEAK MEASURE/CONTROL to enter control mode.

The display shows “Aim” in place of “Leak Measure”.

(2) Enter a Ps aim of 1016 mbar by pressing: ALT/Ps, 1, 0, 1, 6, ENTER.

(3) Enter a Qc aim of 272 mbar by pressing:SPEED/Qc, 2, 7, 2, ENTER.

Wait for the aim values to be achieved then wait for 1 min.

(4) Press LEAK MEASURE/CONTROL to return to Leak Measure mode.

(5) Press RATE TIMER and select [WAIT 05:00], [TIME 01:00]. Observe that the

"Waiting" time is shown on the display as it counts down, followed by the "Timing" time.

(6) At the end of the "Timing" period, the display shows the rate of change of

Ps, Qc and Pt with a “T” to indicate timed average.

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(7) Check that the Ps, Qc and Pt rates are less than or equal to ±0.5 mbar/min.

If the leak rate is not achieved, allow further thermal stabilization time and re-test by pressing RATE TIMER and selecting [WAIT 05:00], [TIME 01:00].

(8) Press CLEAR/QUIT to exit rate display.

Vacuum Leak Check

 This section verifies that the unit is leak tight under vacuum conditions.

(1) Press LEAK MEASURE/CONTROL to enter control mode.

The display shows “Aim” in place of “Leak Measure”.

(2) Enter a Ps aim of 100 mbar by pressing: ALT/Ps, 1, 0, 0, ENTER

(3) Enter a Qc aim of 0 mbar by pressing: SPEED/Qc, 0, ENTER

(4) Wait the required time for temperature stabilization e.g., one minute.

Press LEAK MEASURE/CONTROL return to Leak Measure mode.

(5) Press RATE TIMER and select [WAIT 05:00], [TIME 01:00]. Observe that

the "Waiting" time is shown on the display as it counts down, followed by the "Timing" time.

(6) At the end of the "Timing" period, press ROC/Ps RATE to display the measured rate of

change of Ps (“T” is shown after the value indicating a timed average).

(7) Check that the Ps, Qc and Pt rates are less than or equal to ±0.5 mbar/min.

If the leak rate is not achieved, allow further thermal stabilization time and re-test by pressing RATE TIMER and selecting [WAIT 05:00], [TIME 01:00].

(8) Press CLEAR/QUIT to exit special rate time display.

Range check

 Using key presses based on the above, control the Ps and Qc pressures to the normal

limits of operation and make sure that these are achieved. Use minimum Ps and zero Qc and then maximum Ps and maximum Qc.

Note: Do not exceed the maximum Pt as shown on the front panel of the unit.

Use maximum available rates of change to minimise test times.

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Testing and Fault Finding

Controller Stability

 This section verifies the control stability.

(1) Press LEAK MEASURE/CONTROL to turn the pressure controllers on.

“Aim” replaces “Leak Measure” on the display.

(2) Enter a Ps aim of 510 mbar with a rate of change of 204 mbar/min. by

pressing the following: ALT/Ps, 5, 1, 0, ENTER, Ps RATE, 2, 0, 4, ENTER.

(3) Enter a Qc aim of 0 mbar with a rate of change of 204 mbar/min. by

pressing the following: SPEED/Qc, 0, ENTER, RATE, 2, 0, 4, ENTER.

(4) Press Ps and wait for the aim values to be achieved.

(5) If auto-zero is enabled, wait for an auto-zero to take place. During auto

zero, the valve state changes on the mimic panel and the display shows “Zero” in place of the airspeed aim value. The time to auto-zero should be less than 1 minute from achieving the aim value.

(6) Wait for a minimum of 20 seconds after auto-zero before proceeding.

(7) Observe the measured values of Ps and Qc on the display for 1 min.

(8) Check that the displayed value of Ps remains within ±0.068 mbar.

(9) Check that the displayed value of Qc remains within ±0.068 mbar.

Note: If a further auto zero takes place, allow the display to stabilize

following the auto zero before proceeding.

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5 - 11

5.7 Testing an Option Facility

 The following tests should only be carried out if the serviceability of an option facility is

suspected or when an error occurs.

Testing the IEEE 488 Facility

 This IEEE 488 facility requires specialist knowledge of both IEEE 488 communications

and test programming for specified, authorized test procedures. Only qualified personnel should use this facility, the test procedure must be authorized by the appropriate engineering authority.

 To enable and disable this IEEE 488 facility access the configuration menu. When

enabled, this facility will be available from power-up of the ADTS 405 with the settings held in non-volatile memory.

Configuring and Enabling the IEEE 488 Facility

 To enable the IEEE 488, set the ADTS 405 to the SCPI IEEE option and set to Address 1

as follows:

 Press and hold down F1 then press SETUP to enter the configuration menu.

Release both keys.

 If requested, enter PIN details.

 Press [MORE], [DISPLAY/OPTIONS], [OPTIONS], [IEEE-488], [SCPI/OPT2].

 Check the display shows that SCPI is selected, if the settings are correct, press

CLEAR/QUIT until the display shows the main pressure display, run the test program below.

 If the display does not show that SCPI is selected, press [SCPI].

 Press CLEAR/QUIT, [DEVICE ADDRESS].

 Check the address displayed is 1.

 If not, press 1 on the numeric key-pad and then ENTER.

 If any changes have been made, press CLEAR/QUIT until requested to accept

the changes, then press ENTER.

 The ADTS 405 automatically restarts, when the display shows the main pressure

display, carry out the following test program.

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K114 Issue No. 9

5 - 12

Testing and Fault Finding

Programming a Test of the IEEE 488 Facility

 There are many different programs and items of equipment for communicating over

the IEEE 488 interface. In the following example, the user must be familiar with the IEEE 488 bus controller to be used.

 The following example commands can be used to check for correct operation of the

IEEE 488 interface. Initialize the bus controller as follows:

 Set Address 1 as the talker listener address.  Make sure that bus time-out periods are set sufficiently high (e.g., 5 seconds).

 Set the bus controller to send EOI with last byte and to expect EOI on last byte of

received data.

 Send interface clear (IEEE 488 command).  Send "SOURCE:STATE OFF" (one space between STATE and OFF).  Send "SOURCE:STATE?"  Instruct device 1 to TALK and input the response string.  The response string should be "OFF".

(1) If the above procedure is unsuccessful, check the continuity of the IEEE

488 cable.

(2) If faulty, replace the cable.

(3) If the continuity of the cable is correct, return the ADTS 405 to the repair

depot.

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5 - 13

Connection of the IEEE 488 Facility

 The front connector is behind the option connector cover plate.

CAUTION: THE OPTION CONNECTOR COVER MUST ALWAYS BE FITTED WHEN THE EQUIPMENT IS USED

OUTDOORS

OR IN AN ENVIRONMENT WHERE MOISTURE MAY ENTER THE UNIT THROUGH THE

OPTION

CONNECTOR PANEL.

 The connector details are as follows:

dradnatS

niProtcennoC

rebmuN

noitcnuF

dradnatS

niProtcennoC

rebmuN

noitcnuF

110ID31501D

2201D41601D

3301D51701D

4401D61801D

5I0E71NER

6VAD81]2[dnG

7DFRN91]2[dnG

8CADN02]2[dnG

9CFI12]2[dnG

01QRS22]2[dnG

11NTA32]2[

dnG

21]1[dleihS42]2[dnG

[1] Chassis connection [2] 0V return for signals (not chassis)

Page 86

K114 Issue No. 9

5 - 14

Testing and Fault Finding

Testing the Altimeter Encoder Option

 To enable and disable this Altimeter Encoder facility access the configuration menu.

When enabled, this facility will be available from power-up of the ADTS 405 with the settings held in non-volatile memory.

Configuring and enabling the Altimeter Encoder Option

Press and hold down F1 and press SETUP to enter the configuration

menu. Release both keys.

 Press [MORE], [DISPLAY/OPTIONS], [DISPLAY TYPE], [NEXT], [ENCODER].

 Check the display shows "Encoder" is selected.

 Press [SAVE], then repeatedly press CLEAR/QUIT until the display shows the

following:

Note: With an incorrect bit combination such as all zeroes, the display shows "ENCODER

ERROR" in the place of the decoded value.

 If the above procedure is unsuccessful, check the continuity of the Altimeter Encoder

cable.

 If faulty, replace the cable.

 If the continuity of the cable is correct, return the ADTS 405 to the repair depot.

Alt 5000

ft Aim 5000 D2 to C4>00001010010 CODE 5000

ADTS 405 mode

value

units of measurement

bit codedecoded value

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K114 Issue No. 9

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5 - 15

Optional cable (AAU-32 units)

 The 15-core cable is supplied for the AAU-32 encoder unit:

Note: The D2 data line (turquoise cable) is not defined for the AAU-32, it is for above

62,000 ft and not connected.

lenaptnorF

rotcennoc

.oNnip

noitcnuF

ruolocelbaC

edoc

23-UAA

rotcennoc

snip

1BSL4CnworbB

32CderC

51CegnaroD

74BwolleyE

92BneergF

111BeulbG

314AteloivH

222AetihwJ

21AyergK

44DkcalbL

c/nBSM2D*esiouqrotc/

8langis)V0(nommocknipA

01rewop)V0(nommocder/wolleyb

M+

41rotarbivV42+eulb/derP

21redocneV42+der/neergc

llehsdnuorg/esacllehsallehs+

OPTIONAL CABLE CONNECTIONS

Page 88

K114 Issue No. 9

5 - 16

Testing and Fault Finding

Testing the ARINC 429 Option

 To enable and disable this ARINC facility access the configuration menu. When

enabled, this facility will be available from power-up of the ADTS 405 with the settings held in non-volatile memory.

Configuring and enabling the ARINC 429 Option

 To enable the ARINC option as follows:

 Press and hold down F1 and press SETUP to enter the configuration menu.

Release both keys.

 Press [MORE], [DISPLAY/OPTIONS], [OPTIONS], [ARINC-429].  Check the display shows ARINC 429 is selected.

noitcnuF niP ruoloC

ev+tuptuo51wolley

ev-tuptuo61eulb

ev+tupni81neerg

ev-tupni91der

htrae/dnuorGllehs-

Note: If the ARINC 429 option is not fitted the value is replaced by "absent".

 If the above procedure is unsuccessful, check the continuity of the ARINC 429 cable.

 If faulty, replace the cable.

 If the continuity of the cable is correct, return the ADTS 405 to the repair depot.

Alt XXXXX ft Leak Measure Bus XXXXX ft ARINC 429 WARMUP

ADTS 405 mode

value

units of measurement

ADTS 405 status

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K114 Issue No. 9

Druck ADTS 405 User Manual

5 - 17

Note:

Some errors display extra information using a four digit hexadecimal code. This should always be recorded with the error number to provide information for the repair depot.

rorrE

edoC

egasseMrorrE

lamicedaxeH

edoC

515YDAERREGNOLONUSP

615RORRERELLORTNOCNWONKNU

715TUOEMITGNIR

055ERULIAFROSNESYTIDIMUHsP

155ERULIAFROSNESYTIDIM

UHtP

106RORREMARLANRETNI

306MORPEEOTGNITIRWRORRE

306DETTIFTONROYTLUAFSMORPEEMETSYS

107RORRETSET-FLESsP

207RORR

ETSET-FLEStP

307RORRETUOEMITTSET-FLESsP

407RORRETUOEMITTSET-FLEStP

017RORRERELLORTNOCsP

117RORRERELLORTNOCs

217RORRERELLORTNOCsP

317RORRERELLORTNOCsP

417RORRERELLORTNOCsP

717RORRERELLORTNOCsP

027RORRERELLORTNOCtP

127RORRERELLORTNOCtP

227RORRERELLORTNOCtP

327RORRERELLORTNOCtP

427RORRERELLORTNOCtP

727RORRERELLORTNOCtP

108NEPOOTDELIAFREVIRD884EEEI

208TESEROTDELIAFREVIRD884EEEI

009ERAWTFOSLANRETNI

999RORRELANRETNI

5.8 Fault Finding

5.8.1 Error Messages

 In the event of a malfunction, the built-in, self-test and diagnostic system

displays an error message and error code. A unit displaying this type of error should be returned to the repair depot:

TABLE 5-2 ERROR MESSAGES

IMPORTANT NOTE

If the display shows

ERROR 703 START UP Ps SELF TEST TIME ERROR.

Check that the expansion port plug (item 13, Table 2-1) is correctly connected in the expansion port on the rear panel (Fig. 2-4).

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5 - 18

Testing and Fault Finding

5.8.2 Warning Messages

 The following table lists the warning messages with the probable cause and

action to be taken.

TABLE 5-3 WARNING MESSAGES

(continued)

.oNegasseMesuaCelbaborPnoitcA

2TUPNIRESUDILAVNI

sawderetneeulavcirebmunehT

egnardewollaehtedistuo

dewollanihtiweulavretne-eR

egnar

ELBAN

ELACETAREPO

LENAPSUTATSNO

gnivomererofebdetratsnoitarbilaC

tnorfehtnoetalpelbanenoitarbilac

lenap

gnidniftluafniamehtotrefeR

launamecivresehtnitrahc

NIDILAVYLNO

EDOMLORTNOC

erusaemkaeLnidewollatonnoitceleS

edom

orellortnoctceleS

012

TRATSTFOSsP

TUOEMIT

otniogotdeliafsahrellortnocsPehT

edomlortnoc

sliaffI.niagaLORTNOC

tceleS

tluafniamehtotrefer,niaga

ecivresehtnitrahcgnidnif

launam

212LIAFERUSSERPsP

fossoldetcetedsahrellort

nocsPehT

yllacitamotuadnaerusserpylppus

.edomerusaemotslennahclladehctiws

fosetarhgihyrevtarucconacsihT

mulovegralniegnahcerusserp

ecudorptonnacspmupehtfismetsys

erusserphguone

EROFEBylppuserusserperotseR

.nia

gaedomlortnocotgniog

gnidniftluafniamehtotrefeR

launamecivresehtnitrahc

312LIAFMUUCAVsP

ssoldetcetedsahrel

lortnocsPehT

yllacitamotuadnamuucavylppusfo

.edomerusaemotslennahclladehctiws

fosetarhgihyrevtarucconacs

iht

smetsysemulovegralnignahcerusserp

hguoneecudorptonnacspmupehtfi

muucav

EROFEBylppusmuucaverotseR

.niag

aedomlortnocotgniog

gnidniftluafniamehtotrefeR

launamecivresehtnitrahc

022

TRATSTFOStP

TUOEMIT

otniogotdeli

afsahrellortnoctPehT

edomlortnoc

sliaffI.NIAGALORTNOCtceleS

tluafniamehtotrefer,niaga

ecivresehtnitrahcgn

idnif

launam

222LIAFERUSSERPtP

fossoldetcetedsahrellortnoctPehT

yllacitamotuadnaerusserpylppus

.edomerusaem

otslennahclladehctiws

fosetarhgihyrevtarucconacsihT

emulovegralniegnahcerusserp

ecudorptonnacspmupehtfis

metsys

erusserphguone

EROFEBylppuserusserperotseR

.niagaedomlortnocotgniog

gnidniftluafniamehtotrefeR

laun

amecivresehtnitrahc

Page 91

K114 Issue No. 9

Druck ADTS 405 User Manual

5 - 19

.oNegasseMesuaCelbaborPnoitcA

322LIAFMUUCAVtP

fossoldetcetedsahrellortnoctPehT

yllacitamotuadnamuucavylppus

.edomerusaemotslennahcllade

hctiws

fosetarhgihyrevtarucconacsihT

emulovegralniegnahcerusserp

ecudorpotnnacspmupehtfismetsys

muucavhgu

one

EROFEBylppusmuucaverotseR

.niagaedomlortnocotgniog

103

HGIHOOTETARKAEL

LORTNOCGNINIAGER

rofdeniagerylla

citamotuaedomlortnoC

hgihootsetarkaelsaytefastfarcria

tseterdnakaeltcerroC

203

STIMILEDISTUO

LORTNOCGNINIA

GER

rofdeniageryllacitamotuaedomlortnoC

seulavserusaemehtsaytefastfarcria

gnitarepoehtfoedistuodetfirdevah

skaeloteudstimil

kaelfI.tseterdnaskaeltcerroC

cQlanimontahterusne,sP

stk002.g.e(deilppasierusserp

)deep

sriaevitagendiovaot

303

OOTTESFFOOREZ

EGRAL

-otuagnirudderusaemtesffoorezehT

edistuosaworez

roftopedecnanet

niamotnruteR

noitarbilac

403

KNALBGNIZILAITINI

SMORPEEMETSYS

evahSMORPEEwenfisruccoylnosihT erawtfosmetsysn

iamnorodettifneeb

edargpu

lamrongnirudsruccoegassemfI

ecnanetniamotnruter,noitarepo

.toped

503

OGSTIMILEDIS

TUO

DNUORGOT

wenedistuosierusserpderusaeM

stimilpu-rewoprodetcelesstimil

stimilnihtiwotserusserplortnoC

3NOSPMUPHCTIWS

ehthtiwedomlortnoctcelestonnaC

ffospmup

nospmuphctiwS

703

NOITACINUMMOC

TEKCAP-TLUAFGNIR

TPURR

OCSI

rorrelanretnI

,detaeperebnactluafehtfI

.topedecnanetniamotnruter

803

METSYSGNITADPU

SMORPEE

edargpueraw

tfoSetunim1tiaW

903LORTNOCTONNACtsetpmupdeliaFstimilmetsyskcehC

013DELIAFTSETPMUPstmilgniveihcatonpmuPstimilre

wolteS

TABLE 5-3 WARNING MESSAGES (CONTINUED)

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Testing and Fault Finding

INTENTIONALLY LEFT BLANK

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6 REFERENCE AND SPECIFICATION

6.1 Introduction

 This section includes a full description of each key function including references to

associated functions.

 The available keys are:

F1 - F4 ALT/Ps SPEED/Qc MACH/Pt EPR ROC/Ps RATE RATE TIMER HOLD RATE LEAK MEASURE/CONTROL GROUND PORT REMOTE PRINT EXECUTE TEST PROGRAM HELP SETUP

s (nudge up) t (nudge down)

0 to 9

- 000 CLEAR/QUIT ENTER . (decimal point)

Double key presses give:

ABORT (CLEAR + ENTER) CONFIGURATION (F1 + SETUP)

6.2 Main Pressure Display

F1 - F4

 These function keys or soft-keys are used to select choices from menus. The menu

choices may be shown directly over the keys or displayed as a list.

 When a menu is displayed, press the appropriate function key to select the required

choice.

 CLEAR /QUIT can be used to leave a menu without making a selection.

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Reference and Specification

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K114 Issue No. 9

ALT/Ps

 In aeronautical units (ft or m), this key selects an altitude display.

 In pressure units (mbar, inHg etc.), this key selects a static pressure (Ps) display.

 SETUP, [UNITS] can be used to change the units of display, if set-up mode is not switched off.

 Before entering a new altitude or Ps aim, set the rate of change using the ROC/Ps Rate

key.

 In Control Mode (Aim display), enter a new altitude or Ps aim using the numeric keys.

Use LEAK MEASURE/CONTROL to change between Control and Leak Measure mode.

SPEED/Qc

 In aeronautical units (kts, km/h), this key selects an airspeed (CAS or TAS) display. In

pressure units (mbar, inHg etc.), this key selects dynamic pressure and the display shows (Qc).

 The airspeed can be displayed and entered as either Calibrated Airspeed (CAS, Vc) or

True Airspeed (TAS, Vt).

Note: For testing purposes, Calibrated Airspeed equates to Indicated Airspeed (IAS).

 The Pt temperature value affects the calculation of TAS. The value of Pt temperature,

normally measured by the aircraft temperature sensor, can be changed by SETUP, SPEED/Qc, [Pt TEMPERATURE] only in full set-up mode.

 Use SETUP, SPEED/Qc, [CAS/TAS] to select CAS or TAS.

 CAS/TAS can be changed in full set-up mode.

 If the altitude aim is changed, after the entry of CAS, the Mach and TAS aim values

change while the CAS value remains unchanged*.

 If the altitude aim is changed, after the entry of TAS or Mach, the CAS aim value

changes while the TAS and Mach values remain unchanged*.

 If the Ps aim is changed, after the entry of Qc, then the Pt aim value changes while the

Qc remains unchanged*.

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 If the Ps aim is changed, after the entry of Pt, then the Qc aim value changes while the

Pt remains unchanged

The display shows = symbol next to the parameter that remains unchanged.

 SETUP, [UNITS] can be used to change the units of display, if set-up mode is not

switched off.

 Before entering a new CAS or Qc aim, the rate of change should be set using the RATE

key.

 In Control Mode (AIM display), a new CAS or Qc can be entered using the numeric keys.

Use LEAK MEASURE/CONTROL to change between Control and Leak Measure mode.

MACH/Pt

 In aeronautical units (ft/kts or m/km/h), this key selects a Mach display.

 In pressure units (mbar, inHg etc.), this selects a total pressure (Pt) display.

 If the altitude aim is changed, after the entry of CAS, the Mach and TAS aim values

change while the CAS value remains unchanged*.

 If the altitude aim is changed, after the entry of TAS or Mach, the CAS aim value

changes while the TAS and Mach values remain unchanged*.

 If the Ps aim is changed, after the entry of Qc, then the Pt aim value changes while the

Qc remains unchanged*.

 If the Ps aim is changed, after the entry of Pt, then the Qc aim value changes while the

Pt remains unchanged*.

The display shows = symbol next to the parameter that remains unchanged.

 Before entering a new Mach or Pt aim, set the rate of change of speed using the

SPEED/Qc key followed by the RATE key.

 In Control Mode (AIM display), a new Mach or Pt aim can be entered using the numeric

keys, Use LEAK MEASURE/CONTROL to change between Control and Leak Measure mode.

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EPR

 Engine Pressure Ratio (EPR) is only available in pressure units (mbar, inHg etc.).

 The ADTS 405 can be used to check EPR sensors and indicators.

 For EPR testing, use Ps as INLET pressure and EPR to set the ratio of OUTLET pressure

(Pt) to INLET pressure.

 Before entering a new EPR aim, the rate of change should be set using the RATE key.

 In Control Mode (Aim display), a new EPR aim can be entered using the numeric keys.

Use LEAK MEASURE/CONTROL to change between Control and Leak Measure mode.

ROC/Ps RATE

 In aeronautical units (ft or m), this key selects a Rate of Climb (ROC) or vertical speed

display.

 In pressure units (mbar, inHg etc.), this key selects a rate of change of Ps display.

 SETUP, [UNITS] can be used to change the units, if set-up mode is not switched off.

 In Control Mode (AIM display), a new ROC or Ps rate can be entered using the numeric

keys. Use LEAK MEASURE/CONTROL to change between Control and Leak Measure mode.

RATE TIMER

 The RATE TIMER key starts an internal timer for one of three pre-defined times. On the

completion of the time period, the average rate of change over the time period is displayed.

 Each selected TIME period can have an associated WAIT period to allow pressures to

settle before the timing starts. The WAIT period counts down to zero before the TIME period starts.

 To use the rate timer:

 Press RATE TIMER.

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 Press F1, F2 or F3 to select the required WAIT and TIME periods.  The main pressure displays shows the WAIT or TIME period counting down.  After timing, the timed average value, identified by a T directly to the right

of the value, replaces the instantaneous rate value.

 In measure mode the display changes to show the timed rate of all associated

parameters on the same screen. Pressing one of the set-point keys (e.g., ALT, ROC, SPEED etc.,) or CLEAR/QUIT exits from this screen.

 At any time during rate timing or when a timed value is displayed, pressing the RATE

TIMER key allows for either the restarting or cancelling of the timing. When timing is

cancelled, the rate displays return to instantaneous values.

 The timed average value remains until a new aim is entered. During this

time, it is possible to view any parameter.

 The WAIT and TIME periods can be changed using SETUP, RATE TIMER,

providing SETUP lock is not enabled.

HOLD

 When HOLD is pressed, a changing pressure is instantaneously held. Pressing HOLD

again releases the pressure to continue to the aim value. The HOLD facility applies to both channels simultaneously and can be used to test pressure switches as follows:

Airspeed Switch Test

 Take the airspeed to a value just below the expected trip point.  Enter a low rate of speed.  Enter a new airspeed aim above the trip point.  Immediately the switch trips, press HOLD.  Read the airspeed value - this is the trip value for increasing airspeed.  Enter a new airspeed aim below the expected trip value.  Immediately the switch trips, press HOLD.  Read the airspeed value - this is the trip value for decreasing airspeed.  Press HOLD again to release hold.  For both channels to start moving to new aims at the same time, use the following

sequence:

 Press HOLD.  Enter Ps channel aim.  Enter Pt channel aim.  Enter required rates.  Press HOLD again to release hold.  HOLD is automatically released when entering Measure Mode.

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K114 Issue No. 9

RATE

 In aeronautical units (kts, km/h), this key selects a rate of change of airspeed (Rate CAS)

display.

 In pressure units (mbar, inHg etc.), this key selects a rate of change of pressure (Rate

Qc, Rate Pt or Rate EPR) display. The actual display depends on the parameter selected before pressing RATE.

 The following rates are available in aeronautical units:

* Rate CAS is displayed with the airspeed in either CAS or TAS.

 The following rates are available in pressure units:

 If set-up mode is not switched off, SETUP, [UNITS] can be used to change the units of

display.

 A new rate aim can be entered using the numeric keys, if the unit is in Control Mode

(Aim displayed). Use LEAK MEASURE/CONTROL to change between Control and Leak Measure mode.

 If the automatic airspeed rate is selected (using SETUP, RATE) the airspeed rate is

automatically adjusted to simultaneously achieve both altitude and airspeed aim values. This adjustment normally requires a reduction in the rate from the aim value; the rate does not exceed the aim value. When airspeed (not Qc) is automatically reduced, the display shows (A) after RATE CAS.

LEAK MEASURE/CONTROL

 This key switches between Control and Leak Measure mode.

Note: The pneumatic supply pumps must be switched on before going to CONTROL mode.

Key-press sequence Rate of change display

Qc, RATE Rate Qc Pt, RATE Rate Pt EPR, RATE Rate EPR

Key-press sequence Rate of change display

SPEED, RATE Rate CAS * MACH, RATE Rate MACH

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 The controllers can be switched off to measure leaks in the aircraft system.

 When in leak measure mode, the display shows “LEAK MEASURE”.

 Press LEAK MEASURE/CONTROL to switch the controllers on. The display briefly shows

“REGAINING CONTROL” while the pressure controllers adjust to the system pressure. No significant pressure transients are produced when regaining control.

 When in control mode, the display shows “Aim" value.

 Two safety systems are built-in to protect the aircraft systems during leak testing.

These are Auto Leak recovery and Auto Limit recovery.

 Auto Leak recovery automatically regains control if the leak rate exceeds the currently

set limits on either channel.

 Auto Leak recovery can be switched off using

SETUP, LEAK MEASURE/CONTROL, [AUTO

LEAK].

 If negative airspeed or Qc occurs in measure mode, the zero valve automatically opens

for a period of one second to balance the airspeed or Qc. This only applies when the minimum CAS (or Qc) limit is zero.

Note: This only applies when the minimum CAS or Qc limit is zero.

 Auto Limit recovery automatically regains control if the pressure on either channel

leaks outside of the selected limits, (except for negative airspeeds).

 Auto Limit recovery can be switched off using

SETUP, LEAK MEASURE/CONTROL, [AUTO

LIMIT].

Note: Auto Limit and Auto Leak recovery functions require the pneumatic supply pump to be

switched on.

GROUND

 This key enables a display of ground pressure or automatically controls the pressures

in the aircraft system to local atmospheric pressure.

 The local atmospheric pressure is recorded by the ADTS 405 during the power-up

sequence.

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K114 Issue No. 9

 When GROUND is pressed, a menu gives a choice of three ground functions:

[GO TO GROUND]

Note: The Go-to-Ground operates only in Control Mode.

 Selecting [GO TO GROUND] automatically enters an altitude or static aim equivalent to

local atmospheric pressure (QFE) and an airspeed or dynamic pressure aim of zero. The system pressures will then be controlled towards these aims, in the normal way, at the rates set by the ROC/Ps Rate and RATE keys. At any time when going-to-ground, a new rate of change can be entered, the ADTS 405 continues going-to-ground.

 At any time during going-to-ground, a new value aim for ALT, CAS, TAS, Mach, Ps, Qc, Pt

or EPR can be entered. This causes the procedure to stop and normal controlling operation to start.

 When the airspeed is zero and the Ps channel pressure is close to ground, the QFE is

re-measured to update the stored "ground" pressure value, the display shows the message "CHECKING GROUND". The ADTS 405 then reconnects to the system under test and equalizes the pressures.

 The display shows the message “Safe At Ground”; the ground and zero valves remain

open so that the aircraft system permanently vents to atmosphere. No commands can be entered when these two messages are displayed.

 Press CLEAR/QUIT to continue with normal operation. The ground and zero valves

then automatically close.

[DISPLAY QFE]

 When [DISPLAY QFE] is selected, the local atmospheric pressure recorded during the

power-up sequence is displayed as QFE in the default units set in configuration.

 Press CLEAR/QUIT to return to the normal user display.

[DISPLAY QNH]

 When [DISPLAY QNH] is selected, the local atmospheric pressure recorded during

power-up is converted to the equivalent sea level pressure. The display shows QNH, in the default units set in configuration, together with the station (airfield) altitude.

 The station (airfield) altitude can be changed in full set-up mode by using SETUP,

GROUND.