Schiller CARDIOVIT AT-1 How to use

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SCHILLER AT-1 / AT-1smartprintECG Unit
SERVICE HANDBOOK Issue b June 2001
Art.No. 2.540022
AT-1 /
AT-1smartprint
ECG unit
Service Handbook
SCHILLER AG
Altgasse 68
CH-6341 Baar, Switzerland
Phone: + 41 41 766 42 42
Fax: + 41 41 761 08 80
Home page: http://www.schiller.ch/
June 2001 Article Number: 2.540022

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AT-1 / AT-1 smartprint Service Handbook
Article Number 2. 540022b
Issue a : March2001
Issue b : June2001
Associated Documents
Guide to the SCHILLER Interpretation
and Measurement Program E/ D/ F Article No. 2.510179
SCHILLER AT-1 / AT-1 smartprint User Guide - EDF Article No. 2.510171e
Windows™ is a trademark of Microsoft Corporation.

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SCHILLER AT-1 / AT-1smartprintECG Unit
SERVICE HANDBOOK Issue b June 2001
Art.No. 2.540022
Where to Obtain Service
USA /
Canada WELCH ALLYN SCHILLER Inc., 7420 Carroll Road, San Diego, CA , US-92121- 2334 USA
Tel.: [phone] Fax : [phone]
Home Page : www.welchallyn.com
Asia Pacific SCHILLER Asia Pacific, 10 Jalan SS 3/33, Taman Universiti, 47300 Petaling
Jaya, Selangor, Malaysia
Tel.: + 603 7877 5336 Fax : + 603 7877 5744
Austria SCHILLER HmbH, Kampmüllerweg 24, A-4044 Linz, Austria
Tel.: + 43 732 709 90 Fax : + 43 732 757 000
France SCHILLER Medical S.A, BP 50, 19, Avenue de la Gare, F-67162 Wissembourg /
Cedex, France.
Tel.: [phone] Fax : [phone]
Germany
(EU authorized
representative)
SCHILLER Medizintechnik GmbH, Rudolf-Diesel Strasse 14, D-85521
Ottobrunn, Germany
Tel.: + 4989 629 981 0 Fax : + 4989 609 509 0
India SCHILLER Healthcare India Pvt. Ltd.,D.C.Silk Mills Compound, 'A' Wing, 1st
floor, 5, Chunawala Estate, Kondivitta Lane, Andheri - Kurla Road, Andheri (E,
Mumbai - 400 059, India
Tel.: + 9122 826 3520 Fax : + 9122 826 3525
Italy ESAOTE Spa (SCHILLER), Via di Caciolle 15, I-50127 Firenze, Italy
Tel.: + 39055 4229 201 Fax : + 39055 4229 208
Switzerland SCHILLER Reomed AG, Riedstrasse 14, CH-8953 Dietikon, Switzerlan
Tel.: [phone] Fax : + 411 740 3710
All other
countries SCHILLER AG, Altgasse 68, CH-6341 Baar, Switzerland
Tel.: + 4141 766 4242 Fax : + 4141 761 0880
Home Page : www.schiller.ch
The SCHILLER sales and service centre network is worldwide. For the address of your local distributer,
contactyour nearestSchillersubsidiary.Incase ofdifficultyacompletelist ofall distributersandsubsidiaries
is provided on our internet site or can be supplied from our head office.

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Warranty
Terms of Warranty
The SCHILLER AT-1 / AT-1 smartprint is warranted against defects in material and
manufacture for the duration of one year (as from date of purchase). Excluded from
this guarantee is damage caused by an accident or as a result of improper handling.
Thewarrantyentitles freereplacement ofthe defectivepart.Any liabilityfor subsequent
damageis excluded.The warrantyis voidif unauthorizedor unqualifiedpersonsattempt
to make repairs.
In case of a defect, contact your dealer or the manufacturer.
Themanufacturercanonlybeheldresponsibleforthe safety,reliability, andperformance
of the apparatus if:
* assemblyoperations, extensions,readjustments, modifications,or repairsare carried
out by persons authorized by him, and
* the ECG unit and approved attached equipment are used in accordance with the
manufacturers instructions.
THEREARE NOEXPRESSORIMPLIEDWARRANTIES WHICHEXTENDBEYOND THEWARRANTIES
HEREINABOVESETFORTH.SCHILLERMAKESNOWARRANTYOF MERCHANTABILITYORFITNESS
FOR A PARTICULAR PURPOSE WITH RESPECT TO THE PRODUCT OR PARTS THEREOF.
Physicians responsibility
THIS UNIT IS PROVIDED FOR THE EXCLUSIVE USE OF QUALIFIED PHYSICIANS OR PERSONNEL
UNDER THEIR DIRECT SUPERVISION. THE NUMERICAL AND GRAPHICAL RESULTS AND ANY
INTERPRETATION DERIVED FROM A RECORDING MUST BE EXAMINED WITH RESPECT TO THE
PATIENTS OVERALL CLINICAL CONDITION. THE RECORDING PREPARATION QUALITY AND THE
GENERAL RECORDED DATA QUALITY, WHICH COULD EFFECT THE REPORT DATA ACCURACY,
MUST ALSO BE TAKEN INTO ACCOUNT.
IT IS THE PHYSICIANS RESPONSIBILITY TO MAKE THE DIAGNOSIS OR TO OBTAIN EXPERT
OPINION ON THE RESULTS, AND TO INSTITUTE CORRECT TREATMENT IF INDICATED.

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SCHILLER AT-1 / AT-1smartprintECG Unit
SERVICE HANDBOOK Issue b June 2001
Art.No. 2.540022
Safety Notices
NOTES
DO NOT USE SOLVENT CLEANERS.
THIS UNIT COMPLIES WITH EMC REGULATIONS FOR MEDICAL PRODUCTS WHICH AFFORDS
PROTECTION AGAINST EMISSIONS AND ELECTRICAL INTERFERENCE. HOWEVER SPECIAL CARE
MUST BE EXERCISED WHEN THE UNIT IS USED WITH HIGH FREQUENCY EQUIPMENT.
BEFORE USING THE UNIT, ENSURE THAT AN INTRODUCTION REGARDING THE UNIT FUNCTIONS
AND THE SAFETY PRECAUTIONS HAS BEEN PROVIDED BY A PRODUCT REPRESENTATIVE.
CAUTIONS
SWITCH THE UNIT OFF BEFORE CLEANING AND DISCONNECT FROM THE MAINS.
THE DEVICE MUST ONLY BE OPERATED USING BATTERY POWER IF THE EARTH CONNECTION
IS SUSPECT OR IF THE MAINS LEAD IS DAMAGED OR SUSPECTED OF BEING DAMAGED.
USE ONLY ACCESSORIES AND OTHER PARTS RECOMMENDED OR SUPPLIED BY SCHILLER AG.
USE OF OTHER THAN RECOMMENDED OR SUPPLIED PARTS MAY RESULT IN INJURY INACCURATE
INFORMATION AND / OR DAMAGE TO THE UNIT.
IT MUST BE ENSURED THAT NEITHER THE PATIENT NOR THE ELECTRODES (INCLUDING THE
NEUTRAL ELECTRODE) COME INTO CONTACT WITH OTHER PERSONS OR CONDUCTING
OBJECTS (EVEN IF THESE ARE EARTHED).
THERE IS NO DANGER WHEN USING THE ECG UNIT FOR A PACEMAKER PATIENT OR WITH
SIMULTANEOUS USE OF OTHER ELECTRICAL STIMULATION EQUIPMENT. HOWEVER, THE
STIMULATION UNITS SHOULD ONLY BE USED AT A SUFFICIENT DISTANCE FROM THE
ELECTRODES. IN CASE OF DOUBT, THE PATIENT SHOULD BE DISCONNECTED FROM THE
RECORDER.
IF SEVERAL UNITS ARE COUPLED THERE IS A DANGER OF SUMMATION OF LEAKAGE CURRENTS.
WHEN OPERATING SEVERAL DEVICES FOR MEDICAL AND NON-MEDICAL APPLICATION DO
NOT USE ANY EXTENSION CABLES OR DISTRIBUTION BOXES FOR THE CONNECTION.
EARTH MUST BE CONNECTED WHEN THE EXTERNAL PRINTER IS USED.

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WARNINGS
SERVICING IS TO BE CARRIED OUT BY QUALIFIED PERSONNEL ONLY.
DO NOT USE THIS UNIT IN AREAS WHERE THERE IS ANY DANGER OF EXPLOSION OR THE
PRESENCE OF FLAMMABLE GASES SUCH AS ANAESTHETIC AGENTS.
THIS PRODUCT IS NOT DESIGNED FOR STERILE USE.
THIS PRODUCT IS NOT DESIGNED FOR OUTDOOR USE.
DO NOT, UNDER ANY CIRCUMSTANCES, IMMERSE THE UNIT OR CABLE ASSEMBLIES IN LIQUID.
DO NOT USE HIGH TEMPERATURE STERILISATION PROCESSES (SUCH AS AUTOCLAVING). DO
NOT USE E-BEAM OR GAMMA RADIATION STERILISATION.
THIS UNIT IS CF CLASSIFIED ACCORDING TO IEC EN 60601-1. THIS MEANS THAT THE
PATIENT CONNECTION IS FULLY ISOLATED AND DEFIBRILLATION PROTECTED. SCHILLER CAN
ONLY GUARANTEE PROTECTION AGAINST DEFIBRILLATION VOLTAGE HOWEVER, WHEN THE
ORIGINAL SCHILLER PATIENT CABLE IS USED.
DO NOT TOUCH THE CASING DURING DEFIBRILLATION.
IF THE PATIENT CABLE SHOULD BECOME DEFECTIVE AFTER DEFIBRILLATION, LEAD OFF WILL
BE DISPLAYED AND AN ACOUSTIC ALARM GIVEN.

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SCHILLER AT-1 / AT-1smartprintECG Unit
SERVICE HANDBOOK Issue b June 2001
Art.No. 2.540022
What is in this book
THESERVICE PHILOSOPHY FORALLSCHILLERUNITSIS FAULT FINDINGTOMODULE LEVELONLY.
THE PURPOSE OF THIS BOOK IS TO PROVIDE ALL THE INFORMATION NECESSARY TO ENABLE
THESERVICE ENGINEERTOEFFICIENTLYLOCATE ANDREPLACEA FAULTY MODULE.THISBOOK
ASSUMESNO DETAILED KNOWLEDGEOF THEECGUNITBUTDOES REQUIRETHATTHESERVICE
ENGINEERIS FAMILIAR WITHSTANDARDWORKSHOP PRACTICES.
The book is divided into the following chapters:
Chapter 1 - Operating Elements
Thepurpose ofthischapter istoprovideaneasy referenceforall mainoperatorfunctions
and to give a basic introductionto the AT-1 / AT-1smartprint. This chapter gives details of
the operator controls with the operation and function of each key briefly explained.
The information in this chapter provides a background to the operating functions only.
Complete operating information is provided in the SCHILLER AT-1 / AT-1 smartprint User
Guide.
Chapter 2 - Functional Overview
Thischapterprovides afunctionaloverview oftheAT-1 /AT-1smartprint. Thedescription
is supported by functional block diagrams.
Chapter 3 - Fault Diagnosis
This chapter provides a guide to locate a fault to module level. The diagnostics are
presentedin alogicalsequence offault findingalgorithms andprocedures. Illustrations
are provided to support the text where needed.
Chapter 4 - Module Removal and Replacement
This chapter gives an overview of the physical construction of the AT-1 / AT-1 smartprint
with the main physical attributes of the unit briefly described. The physical description
is supported by illustrations showing the internal location of all modules. Removal and
replacement instructions for all removable modules are also provided in this chapter.
Each procedure is autonomous with details of tools, jumper settings, adjustments and
settings or special requirements that are required before and after replacement.
Functionalchecksthat mustbe carriedout afterreplacinga moduleare alsoprovided.
Chapter 5 - Adjustments
This chapter provides all adjustments and settings. Also detailed in this chapter are
basic functional test procedures that can be performed to check the functioning of
the unit.
Chapter 6 - Spare Parts
This chapter provides the part numbers and reordering information for all replaceable
modules. Also included in this chapter are details of any special test equipment or
special tools required for adjustment or fault finding procedures.

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What's in this book
Chapter 7 - Technical Data
The full technical specification of the AT-1 / AT-1 smartprint is given in this chapter.
Index
Circuit Diagrams & Board Layouts
The circuit diagrams and component layouts are provided for all boards. These details
are provided for information only.
General Symbols

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SCHILLER AT-1 / AT-1smartprintECG Unit
SERVICE HANDBOOK Issue b June 2001
Art.No. 2.540022
Contents
Associated Documents 2
Where to Obtain Service 3
Warranty 4
Safety Notices 5
What is in this book 7
CHAPTER 1 OPERATING ELEMENTS 11
Introduction 12
Location & Power 13
The Keyboard 14
AT-1/AT-1smartprint Short Form Operating Instructions 15
Manual ECG Recording (internal printer only) 15
System Configuration 15
AutomaticECG Recording
with external printer connected and switched on: 15
with external printer NOT connected or switched off: 15
Modes of Operation 16
Automatic Mode 16
ManualMode 16
Automatic Mode 17
a. without external printer connected or printer switched off 17
b. with external printer 18
Settings 20
Default Settings 22
Language 23
Filters 24
Baseline Filter 24
Mains Filter 24
Myogram Filter 25
Defining Lead Sequence & Printout 26
AcousticQRSIndication 27
Time / Date 27
Automatic Mode (ECG) Settings, Internal Printer 28
Average Cycles 28
Measurements and Markings (M and C versions only) 29
Interpretation (C version only) 29
Automatic Mode (ECG) Settings, External Printer 30
Average Cycles 30
Measurements and Markings (M and C versions only) 31
Interpretation (C version only) 31

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Automatic Mode (ECG) Settings 32
Interpretation Settings (C version only) 32
SelectingRhythmLeads 33
Service Printout 34
Installing Software Options 35
Care & Maintenance 36
Replacing the Recording Paper in the Internal Printer 37
Thermal Paper Handling 38
CHAPTER 2 FUNCTIONAL OVERVIEW 39
Main Board MK 11-10 42
CHAPTER 3 FAULT DIAGNOSIS 45
Fault Diagnosis Chart 46
General Functional Check Procedures 48
Internal Printer Check 49
CHAPTER 4 MODULE REMOVAL AND REPLACEMENT 51
Warnings and Cautions 54
Physical Overview 55
Opening the Case 56
Top Housing Replacement 57
Physical Overview 58
ECG Interface Board MK 11-2 59
Printer Tray Assembly and Thermal Printer 60
Thermal Printer Removal 61
Control and Power Supply Board MK 11-10 62
Battery Pack 64
Keyboard 66
CHAPTER 5 ADJUSTMENTS 67
Introduction 68
Warnings, Cautions and Conditions 69
Test Equipment 70
Battery Charge Voltage 71
ECG Amplifier Reference Voltage 72
CHAPTER 6 SPARE PARTS 75
Ordering Information 76
Spare Parts 77
CHAPTER 7 TECHNICAL DATA 79
Technical Data 80
Index 83

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SCHILLER AT-1 / AT-1smartprintECG Unit
SERVICE HANDBOOK Issue b June 2001
Art.No. 2.540022
Chapter 1
Operating Elements

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Introduction
The AT-1 / AT-1 smartprint is a 3-channel ECG recorder with all (12) ECG signals
simultaneouslyprocessed toprovideinstant ECGrecordings. Threeautomatic recording
modes-two forthe internal printerand one forthe externalprinter- can beindividually
preset to enable one button ECG recording of preferred print formats.
Individuallampsare provided togive power, papererror,filter, leadgroup andlead off
indications.In addition,any detecteddisturbance(i.e.looseelectrodeorend ofpaper),
givesanaudible alarmandthe correspondingindicatorlamp flashes.
The AT-1 / AT-1 smartprint includes the following features:
• Lowweightand compactdimensions
• Printout from integrated quality thermal printer - OR - from external A4 inkjet
printer
• Built-in rechargeable battery for mains-independent use - 2 hrs normal use on one
battery charge
• Simple one key operation for main functions
• Automaticormanual recording modes
• Selectable printing formats - external and internal printer
• Interpretationprogramoption (including measurements)for children andadults
• Choiceof10 languages(AT-1) and 9languages (AT-1 smartprint) for printing.

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SCHILLER AT-1 / AT-1smartprintECG Unit
SERVICE HANDBOOK Issue b June 2001
Art.No. 2.540022
Location & Power
Location
Do not keep or operate the device in a wet, moist, or dusty environment. Also avoid
exposure to direct sunlight or heat from other sources. Do not allow the unit to come
into contact with acidic vapours or liquids, as such contact may cause irreparable
damage.The unitshould notbe placednearX-rayordiathermy units,large transformers
ormotors.The unit mustbe placed ona flat surfaceand must notbe operated inareas
where there is any danger of explosion.
Power Supply
Themains connectionison therearoftheunit. Themainsindicator lamponthe keyboard
is always lit when the unit is connected to the mains supply. The unit can either be
operated from the mains supply or from the built-in rechargeable battery. The power
source is indicated by the respective indicator lamp. When battery capacity is limited,
the battery symbol flashes on and off.
To recharge the battery, connect the device to the mains supply by means of the
supplied power cable. A totally discharged battery needs less than 15 hours to be fully
recharged (60% in less than 3 hours, 90% in less than 7 hours). A fully charged battery
givesapproximately2 hoursof normaluse. Theunitcan remainconnected tothe mains
supply without any danger of damage to either the battery or the unit.
Switching On and Off
The AT-1 / AT-1 smartprint is switched on with the green ON key
and off by means of the red OFF key
Theunitis automaticallyswitchedoff after5minutes (30seconds if batterycapacity is
limited) if no key is pressed and the patient cable is not connected.
Potential Equalisation
IftheAT-1/AT-1 smartprintisusedinconjunctionwithother patientconnectedequipment,
werecommendthat the potentialequalisation stud onthe rear ofthe unit isconnected
tothe buildingcommon groundwiththeyellow/greenground cable(Part-no. 2.310005).
Whenworkingfrom an emergencyvehicle, the vehiclecommon ground canbe used.
WARNING !
THE UNIT MUST BE GROUNDED WHEN THE EXTERNAL PRINTER IS CONNECTED.

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The Keyboard

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SCHILLER AT-1 / AT-1smartprintECG Unit
SERVICE HANDBOOK Issue b June 2001
Art.No. 2.540022
AT-1/AT-1smartprint Short Form Operating Instructions
Automatic ECG Recording
with external printer connected and switched on:
Prepare skin, hook up patient.
Switch unit on, press ON
Press AUTO to record and print externally
with external printer NOT connected or switched
off:
To record and print on internal printer:
For AUTO Format 1 press
For Auto Format 2 press and then
Press COPY for additional copies.
Manual ECG Recording (internal printer only)
Prepare skin, hook up patient.
Switch unit on, press ON
Press MAN START
Change lead group with
Press STOP to stop the printout.
Electrode hook-up check
Press for print-out of
electrode dc offsets.
Best results are obtained when the electrode voltage
readings(rightcolumn) arebetween +50mVand- 50mV.
Filter On/Off
Press to switch the (Myogram) filter On / Off.
System Configuration
Press to print system
settings.

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Modes of Operation
Automatic Mode
a. without external printer connected or printer switched off
AutomaticMode providesa printoutgiving 10seconds ofECG recordingof all12 leads
with a choice of 2 different formats (only for S version).
The following can be programmed freely for each of the 2 formats before recording:
• LeadFormat
• Chart Speed
• With the optional interpretation program installed it is also possible to select the
measurement table, average cycles with optional markings and interpretation
statements for the printout.
For further information see paragraph `Automatic Mode (ECG) Settings` on page 28.
b. with external printer connected and switched on
Only one Automatic Mode format possible. Other details as above.
For further information see paragraph `Automatic Mode (ECG) Settings` on page 30.
Manual Mode
Manual Mode provides a real time print-out of 3 selected leads and is only possible on
the internal thermal printer.
The following can be freely selected before or during recording:
• LeadGroup
• Chart Speed
• Sensitivity
• Myogram Filter
For further information see paragraph `Manual Mode` on page 19.

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SCHILLER AT-1 / AT-1smartprintECG Unit
SERVICE HANDBOOK Issue b June 2001
Art.No. 2.540022
Automatic Mode
a. without external printer connected or printer switched off
In automatic mode, a full 12-lead ECG is printed in one of two predefined formats
with selectable sensitivity. These formats (see Settings) are selected by the user to suit
his specific needs and requirements.
When the AUTO GAIN key is pressed before recording in automatic mode, the
unit detects very large waveform amplitudes and sets the sensitivity for the extremity
and/or precordial leads accordingly to reduce the overlapping of traces.
To start the automatic ECG recording in Format 1, press the AUTO START
key:
To start the automatic recording in Format 2, press the ALT key followed by
the AUTO START key:
+
Depending upon which option is included, the printout gives the following:
• ECG recording of all leads in either Standard or Cabrera format according to
selection
• Sensitivity
• Heart Rate
• Speed
• Filter Settings
• Interpretation statements (with option C)
• Average Cycles (with options M, C)
• Intervals (with options M, C)
• Axes (with options M, C)
• Detailed Measurement Table (with options M, C)
Toobtainan extraprintout ofthe ECG recordingin Format1, simplypressthe COPYkey:
To obtain an extra printout of the second format, press the ALT key followed by the
COPY key: -
Note: The Auto mode settings for the two formats are detailed in the paragraph
entitled ' Automatic Mode (ECG) Settings` later in this chapter.

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Automatic Mode
b. with external printer
With the external printer connected and switched on, only one Auto Mode format
(selectable) is available.
To start the automatic ECG recording in Automatic Mode, press the AUTO
START key:
For further information see paragraph `Automatic Mode (ECG) Settings` on page 30.

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SCHILLER AT-1 / AT-1smartprintECG Unit
SERVICE HANDBOOK Issue b June 2001
Art.No. 2.540022
Manual Mode
Manual mode provides a real-time ECG printout of 3 selected leads with full control
of parameter selection. This is only possible on the internal thermal printer.
To start the manual recording of a real-time ECG, press the MAN START
Printout key
To stop the manual recording (printout) press the STOP key
The printout provides you with the following:
• Three (selected) leads with lead identification.
• On the lower edge, the chart speed and filter settings (if on).
• At the top, the heart rate as current average of 4 beats, trace sensitivity.
The following can be freely chosen during or before the recording:
Lead Group by means of the LEAD FORWARD
and LEAD BACKWARD key
The following lead groups are selectable:
• I, II, III aVR,aVL,aVF
(Cabrera: aVL, I, -aVR / II, aVF, III)
• V1,V2,V3 / V4, V5,V6
Chart Speed Select speed 5, 25 or 50 mm/s by means of the SPEED keys:
Sensitivity Select 5, 10 or 20 mm/mV by means of the SENSITIVITY keys:
Myogram Filter Switch the filter ON or OFF with the FILTER key:
25 Hz or 35 Hz is displayed on the bottom line of the printout
when the filter is switched on.
Recentering To re-centrethe ECG traces, press the 1mV key

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Settings
Eachparameteris setbymeans ofacode. Thiscodecomprises acombinationof keys
starting with theALT key followed by two or three numbers. The setting is confirmed with
the STOP key. As soon as the ALT key is pressed, the keyboard is dedicated to the
programmingfunction.
Note: The Alternative (ALT) function is only active for 4 seconds. If a programming
key is not pressed within 4 seconds, the unit reverts to standard mode. The
ALT key must again be pressed to activate the programming mode
The setting is remembered and the keyboard released for other functions when the
STOP key is pressed. Once a setting has been confirmed, it is stored in the memory
even when the unit is switched off.
Example
If you want to set the language on your ECG unit to English, the key sequence given in
the table (see page 23), is
ALT - 0 - 2 - 2 - STOP.
Onthefollowingpagestheprogrammableparametersandtheprogrammingsequences
are described in detail.