Thommen STRATOTIMER ST3 User manual

Installation and Operating Manual
Stratotimer ST3
THOMMEN AIRCRAFT EQUIPMENT AG
H ofackerstrasse 48, CH-4132 Muttenz, Switzerland
INSTALLATION AND OPERATING MANUAL
STRATOTIMER ST3
ATA 31-20-01
Revision: 1.00
12/06/2020

Installation and Operating Manual
Stratotimer ST3
31-20-01
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RECORD OF REVISIONS
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SERVICE BULLETIN LIST
SB No. Subject Rev. Date

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Installation and Operating Manual
Stratotimer ST3
LIST OF EFFECTIVE PAGES
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LIST OF EFFECTIVE PAGES
SECTION PAGE REV. DATE SECTION PAGE REV. DATE
Title Page 1 12/06/20 Description and Operation 1 12/06/20
2 12/06/20 2 12/06/20
3 12/06/20
4 12/06/20
5 12/06/20
Record of Revisions 1 12/06/20 6 12/06/20
2 12/06/20 7 12/06/20
8 12/06/20
9 12/06/20
10 12/06/20
Service Bulletin List 1 12/06/20 11 12/06/20
2 12/06/20 12 12/06/20
13 12/06/20
14 12/06/20
15 12/06/20
List of Effective Pages 1 12/06/20 16 12/06/20
2 12/06/20 17 12/06/20
18 12/06/20
19 12/06/20
20 12/06/20
Table of Contents 1 12/06/20 21 12/06/20
2 12/06/20 22 12/06/20
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Introduction 1 12/06/20 26 12/06/20
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SECTION PAGE REV. DATE SECTION PAGE REV. DATE
Fault Isolation 101 12/06/20 Adjustment / Test 501 12/06/20
102 12/06/20 502 12/06/20
Maintenance Practices 201 12/06/20
202 12/06/20
203 12/06/20
204 12/06/20
Removal / Installation 401 12/06/20
402 12/06/20
403 12/06/20
404 12/06/20

Installation and Operating Manual
Stratotimer ST3
TABLE OF CONTENTS
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31-20-01
Page 1
TABLE OF CONTENTS
RECORD OF REVISIONS 1
SERVICE BULLETIN LIST 1
LIST OF EFFECTIVE PAGES 1
TABLE OF CONTENTS 1
INTRODUCTION 1
1. Purpose of this Manual 1
2. Manual Description 1
3. Revisions 1
4. Warnings, Cautions and Notes 1
4.1 Warnings 1
4.2 Cautions 1
4.3 Notes 1
5. Technical Support 2
6. Installer Responsibility 2
7. Maintenance 2
8. Warranty 2
9. Document/Equipment Feedback 2
10. List of Abbreviations 4
DESCRIPTION AND OPERATION 1
1. General 1
2. Description 2
3. Specifications and Equipment Data 4
3.1 Specifications and Standards 4
3.2Environmental Qualification 4
3.3 Equipment Identification 5
3.3.1 Part Number 5
3.3.2 Manufacturer’s Code 5
3.3.3 Serial Number 6
3.3.4 Manufactured Date 6
3.3.5 MOD Code 6
3.3.6 Identification Label 6
3.4 Mechanical Characteristics 7
3.5 Electrical and Display Characteristics 9
3.6 Operational Limitations, Range and Tolerances 11
4. Operation 12
4.1 Button Controls 12
4.2 Background Light Options 13
4.3 Overview of S-video and Timer Functions 14
4.4 Setting the Date, UTC and LT 16
4.5 Setting the Flight Timer (FT) and Flight Timer Alarm 17
4.6 Setting the Elapsed Timer (ET), Elapsed Timer Down (ETD) and Elapsed Timer Down
(ETD) Alarm 19
4.7 Main Menu Options 21
4.8 S-video 27

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4.9 Clock Sync Function 27
4.10 Maintenance Function 27
FAULT ISOLATION 101
1. General 101
2. Failure Codes 101
MAINTENANCE PRACTICES 201
1. Installation Considerations 201
1.1 General 201
1.2 Unpacking and Inspection 201
1.3 Pre-installation Check 201
1.4 Electrical Grounding 201
2. Battery Replacement 202
3. Storage 204
3.1 General 204
3.2 Environmental Conditions 204
3.3 Packaging Conditions 204
REMOVAL / INSTALLATION 401
1. Removal 401
1.1 References 401
1.2 Special Tools and Equipment 401
1.3 Consumable Materials 401
1.4 Expendable Parts 401
1.5 Preparation 401
1.6 Removal 401
1.7 Close-up 401
2. Installation 403
2.1 References 403
2.2 Special Tools and Equipment 403
2.3 Consumable Materials 403
2.4 Expendable Parts 403
2.5 Preparation 403
2.6 Installation 404
2.7 Close-up 404
ADJUSTMENT / TEST 501
1. General 501
2. Operational Test 501
2.1 References 501
2.2 Special Tools and Equipment 501
2.3 Consumable Materials 501
2.4 Expendable Parts 501
2.5 Preparation 501
2.6 Procedure 502

Installation and Operating Manual
Stratotimer ST3
INTRODUCTION
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INTRODUCTION
1. Purpose of this Manual
This Installation and Operating Manual (INSOP) gives a description and operation of the
Stratotimer ST3 and the necessary procedural steps to remove/install, inspect and maintain the
equipment. It also gives the necessary mechanical and electrical characteristics to make sure
that the aircraft is compatible with it.
For repair procedures, refer to the Component Maintenance Manual (CMM), 31-20-02.
Only Thommen Aircraft Equipment AG are permitted to repair the Stratotimer ST3.
2. Manual Description
The page blocks in this manual comply with the Air Transport Association of America (ATA)
specification i2200.
3. Revisions
Thommen Aircraft Equipment AG (TAE) gives the customers (that have a product guarantee) a
complete revised manual when a change is included in a manual. The Record of Revisions
section gives the reason for the changes done in the current revision.
A documentation revision service (with a customer portal) is also available for customers that
have instruments/devices no longer covered by the new product guarantee. This is especially
useful when an upgrade to the instrument/device can improve the operational life and/or reliability
of older products. The documentation revision service also includes the necessary Service
Bulletins that upgrade/modify the instrument and/or device.
4. Warnings, Cautions and Notes
4.1 Warnings
WARNING: WARNINGS ARE GIVEN IN THE RELEVANT PAGE BLOCKS TO TELL
PERSONNEL ABOUT SOMETHING THAT CAN CAUSE INJURY TO THEM.
WARNINGS ARE GIVEN IMMEDIATELY BEFORE THE APPLICABLE TEXT
TO WHICH THEY REFER.
4.2 Cautions
CAUTION: CAUTIONS ARE GIVEN IN THE RELEVANT PAGE BLOCKS TO TELL
PERSONNEL ABOUT SOMETHING THAT CAN CAUSE DAMAGE TO THE
EQUIPMENT. CAUTIONS ARE GIVEN IMMEDIATELY BEFORE THE TEXT
TO WHICH THEY REFER.
4.3 Notes
NOTE: Notes give helpful information to the personnel doing the task. Notes are included
before or after the text to which they refer.

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5. Technical Support
Please contact Thommen Aircraft Equipment AG at the address given below for technical
support.
THOMMEN AIRCRAFT EQUIPMENT AG
Hofackerstrasse 48
CH-4132 Muttenz
Switzerland
Phone: [phone]
Email: tech-s[email protected]
Internet: www.thommen.aero
6. Installer Responsibility
The installer is responsible for the correct installation of the equipment. This includes the
mechanical and electrical configuration and compatibility with the aircraft.
All installation personnel must be fully qualified and approved to do the work procedures given
in this Installation and Operating Manual (INSOP).
7. Maintenance
Only Thommen Aircraft Equipment AG are authorised to perform maintenance tasks not given
in this manual.
8. Warranty
The warranty for the Stratotimer ST3 is for 24 months.
9. Document/Equipment Feedback
The Document / Equipment Defect Report (on the next page) gives the customer a way to inform
Thommen Aircraft Equipment AG about any defects regarding the equipment or discrepancies
in the technical documentation. This feedback will help Thommen Aircraft Equipment AG to make
continued improvements to the equipment and/or the technical documentation.

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Stratotimer ST3
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DOCUMENT / EQUIPMENT DEFECT REPORT
Aircraft Type Serial No. Manual No. Operator
Date Reported By Contact Details
Document / Equipment:
Description of Defect:
Corrective action taken to continue operation:
Please send to:
THOMMEN AIRCRAFT EQUIPMENT AG
Hofackerstrasse 48
CH-4132 Muttenz
Switzerland
Telephone: [phone]
Email: tech-[email protected]

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10. List of Abbreviations
Abbreviation Description
3-ATI 3 Inch Air Transport Indicator
AMM Aircraft Maintenance Manual
ARINC Aeronautical Radio Incorporated
ATA Air Transport Association
BIT Built-In Test
CBIT Continuous Built-In Test
CHRON Chronograph
CMM Component Maintenance Manual
CRC Cyclic Redundancy Check
CS Certification Specification
DAC Digital-to-Analog Converter
DAL Design Assurance Level
DCI Discrete Input signal
DCIO Discrete Input / Output signal
DCO Discrete Output signal
ET Elapsed Timer
ETD Elapsed Timer Down
ETSO European Technical Standard Order
FAR Federal Aviation Regulation
FC Failure Code
FRAM Ferroelectric Random Access Memory
FT Flight Timer
GND Ground
GPIO General Purpose Input / Output
GPS Global Positioning System
HW Hardware
Hz Hertz
IBIT Initiated Built-In Test
ID Identification
INSOP Installation and Operating Manual
IO Inputs / Outputs
LRU Line-Replaceable Unit

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Stratotimer ST3
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Abbreviation Description
LT Local Time
MAN Manual
MHB Management Handbook
MIL-STD Military Standard
MTBF Mean Time Between Failures
MTH Maintenance Time in Hours
N/A Not Applicable
NVIS Night Vision Imaging System
PBIT Power-up Built-In Test
PWM Pulse Width Modulation
QTP Qualification Test Procedure
RTCA Radio Technical Commission for Aeronautics
SB Service Bulletin
SBIT Startup Built-In Test
SDRAM Synchronous Dynamic Random Access Memory
ST3 Stratotimer 3 inch
TAE Thommen Aircraft Equipment
TFT Thin Film Transistor
TSO Technical Standard Order
USB Universal Serial Bus
UTC Universal Time Coordinated
VAC Volts Alternating Current
VDC Volts Direct Current
WOW Weight on Wheels

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Installation and Operating Manual
Stratotimer ST3
DESCRIPTION AND OPERATION
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DESCRIPTION AND OPERATION
1. General
This section gives a description of the functionality and operation of the Stratotimer ST3.
The Stratotimer ST3 can be easily installed in all aircraft types with a nominal 28VDC power
supply.
A high resistance to environmental conditions including shock, vibration and mechanical impact
is guaranteed by compliance with DO-160G, MIL-STD-202G and MIL-STD-810G qualification
tests.

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DESCRIPTION AND OPERATION
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2. Description
Refer to Figure 1.
The Stratotimer ST3 is a digital multifunction clock, designed to be easily installed in an
instrument panel of an aircraft using a 3-ATI ARINC square clamp. Connection to a power supply
is with a 26-pin, military grade connector on the rear of the device.
The Stratotimer ST3 is a line-replaceable unit (LRU).
Time and timer functions are displayed on a TFT display, with light digits on a dark background
(negative image).
The different display options can be changed using an on-screen menu with four push-buttons
and a push / turn control knob.
The Stratotimer ST3 has the following display options:
•Universal Time Coordinated (UTC) or Local Time (LT)
•Date
•Flight Timer (FT)
•Elapsed Timer (ET) or Elapsed Timer Down (ETD)
•Maintenance Time in Hours (MTH)
•Alarm indicator for Elapsed Timer Down mode
•S-video
The display of the Stratotimer ST3 has three modes:
•Day mode (colour, high light intensity)
•Night mode (colour, low light intensity)
•NVIS green
The brightness of the display can be either adjusted automatically with two light sensors or
adjusted manually.
An internal battery makes sure that the Stratotimer ST3 continues to keep time when aircraft
power is not available.
The battery can be easily replaced by opening a cover at the rear of the Stratotimer ST3 (refer to
Maintenance Practices, page block 201).
A USB connector can be accessed by opening the same battery access cover. The USB
connector is for the use of approved service centres only, for connecting maintenance software.
Capacitors make sure that the Stratotimer ST3 continues to function during momentary power
disruptions.
An identification label is attached to the top of the Stratotimer ST3. Refer to Description and
Operation, section 3.3 for details.
Two warranty-void labels are attached to the outside of the Stratotimer ST3. The warranty-void
labels must not be removed.
Refer to Description and Operation, section 4, for a detailed description of how to operate the
Stratotimer ST3.

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DESCRIPTION AND OPERATION
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Figure 1 – Stratotimer ST3 Assembly

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DESCRIPTION AND OPERATION
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3. Specifications and Equipment Data
3.1 Specifications and Standards
The relevant specifications and standards, which are the basis of the approvals for the
Stratotimer ST3, are given in the Equipment Specification document (ST-SPE-100).
3.2 Environmental Qualification
The environmental qualification for the Stratotimer ST3 is in accordance with the
specifications and criteria given in the Qualification Test Procedure document (ST-QTP-100).