Schiller AT-1 Service Manual

SCHILLER AT-1 / AT-1smartprint ECG Unit

SERVICE HANDBOOK Issue b June 2001

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

Art.No. 2.540022

AT-1 / AT-1 smartprint Service Handbook

Article Number 2. 540022b

Issue a : March 2001 Issue b : June 2001

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. 510171 e

Windows™ is a trademark of Microsoft Corporation.

Where to Obtain Service

SCHILLER AT-1 / AT-1smartprint ECG Unit

SERVICE HANDBOOK Issue b June 2001

USA / Canada

Asia Pacific S CHILLE R Asia Pacific, 10 Ja la n S S 3 / 3 3, Taman Universiti, 47300 Petaling

Austria SCHIL LER HmbH, Kampmüllerweg 24, A-4044 Linz, Austria

France SCHILLER Medical S.A, BP 50, 19, Avenue de la Gare, F-67162 Wissembourg /

Germany (

EU authorized

representative

India SCHILLER Healthcare India Pvt. Ltd.,D.C.Silk Mills Compound, 'A' Wing, 1st

WELCH ALLY N SC HILL ER I nc., 7420 Carroll Road, San Diego, CA , US-921212334 USA

Tel.: +1 858 635 6023 Fax : +1 858 635 6611 Home Page : www.welchallyn.com

Jaya, Selangor, Malaysia Tel.: + 603 7877 5336 Fax : + 603 7877 5744

Tel.: + 43 732 709 90 Fax : + 43 732 757 000

Cedex, France. Tel.: +33 3 88 63 36 00 Fax : +33 3 88 94 12 82 S CHIL LER Me dizi ntech nik GmbH, Ru do l f- D ie se l St r as se 1 4, D-85521

Ottobrunn, Germany

)

Tel.: + 4989 629 981 0 Fax : + 4989 609 509 0

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.: +411 744 3000 Fax : + 411 740 3710

All other countries

The SCHILLER sales and service centre network is worldwide. For the address of your local distributer, contact your nearest Schiller subsidiary . In case of difficulty a complete list of all distributers and subsidiaries is provided on our internet site or can be supplied from our head office.

S CHILLER AG, A ltgasse 68, CH-6341 Baar, Switzerland Tel.: + 4141 766 4242 Fax : + 4141 761 0880 Home Page : www.schiller.ch

Art.No. 2.540022

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. The warranty entitles free replacement of the defective part. Any liability for subsequent damage is excluded. The warranty is void if unauthorized or unqualified persons attempt to make repairs.

In case of a defect, contact your dealer or the manufacturer. The manufacturer can only be held responsible for the safety , reliability , and performance

of the apparatus if: * assembly operations, extensions, readjustments, modifications, or repairs are carried

out by persons authorized by him, and

* the ECG unit and approved attached equipment are used in accordance with the

manufacturers instructions.

THERE ARE NO EXPRESS OR IMPLIED WARRANTIES WHICH EXTEND BEYOND THE WARRANTIES HEREINABOVE SET FORTH. SCHILLER MAKES NO WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTIC ULAR PURPOSE WITH RESPECT TO THE PRODUCT OR P ARTS THE REOF.

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 PREP ARATION QUALITY AND THE GENERAL RECORDED DATA QUALITY, WHICH COULD EFFECT THE REPORT DA TA 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.

Safety Notices

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.

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.

SCHILLER AT-1 / AT-1smartprint ECG Unit

SERVICE HANDBOOK Issue b June 2001

NOTES

CAUTIONS

USE ONLY A CCESSORIES AND OTHER PARTS RECOMMENDED OR SUPPLIED BY SCHILLER AG. USE OF OTHER THAN RECOMMENDED OR SUPPLIED PARTS MA Y 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 LEAKA GE 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.

Art.No. 2.540022

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

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.

CLASSIFIED ACCORDING TO IEC EN 60601-1. THIS MEANS THAT THE

What is in this book

THE SERVICE PHILOSOPHY FOR ALL SCHILLER UNITS IS F AULT FINDING TO MODULE LEVEL ONL Y. THE PURPOSE OF THIS BOOK IS TO PROVIDE ALL THE INFORMATION NECESSARY TO ENABLE THE SERVICE ENGINEER TO EFFICIENTL Y LOCA TE AND REPLACE A FAUL TY MODULE. THIS BOOK ASSUMES NO DETAILED KNOWLEDGE OF THE ECG UNIT BUT DOES REQUIRE THA T THE SERVICE ENGINEER IS F AMILIAR WITH STANDARD WORKSHOP PRACTICES.

The book is divided into the following chapters:

Chapter 1 - Operating Elements

The purpose of this chapter is to provide an easy reference for all main operator functions and to give a basic introduction to 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

This chapter provides a functional overview of the AT-1 / AT-1 smartprint. The description is supported by functional block diagrams.

SCHILLER AT-1 / AT-1smartprint ECG Unit

SERVICE HANDBOOK Issue b June 2001

Chapter 3 - Fault Diagnosis

This chapter provides a guide to locate a fault to module level. The diagnostics are presented in a logical sequence of fault finding algorithms and procedures. 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. Functional checks that must be carried out after replacing a module are also provided.

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.

Art.No. 2.540022

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

SCHILLER AT-1 / AT-1smartprint ECG Unit

SERVICE HANDBOOK Issue b June 2001

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) 1 5 System Configuration 1 5 Automatic ECG Recording

with external printer connected and switched on: 1 5 with external printer NOT connected or switched off: 15

Modes of Operation 16

Automatic Mode 1 6

Manual Mode 1 6 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 2 5

Defining Lead Sequence & Printout 2 6

Acoustic QRS Indication 2 7

Time / Date 27 Automatic Mode (ECG) Settings, Internal Printer 28

Average Cycles 2 8

Measurements and Markings (M and C versions only) 2 9

Interpretation (C version only) 29 Automatic Mode (ECG) Settings, External Printer 30

Average Cycles 3 0

Measurements and Markings (M and C versions only) 3 1

Interpretation (C version only) 31

Art.No. 2.540022

Automatic Mode (ECG) Settings 32

Interpretation Settings (C version only) 32

Selecting Rhythm Leads 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

SCHILLER AT-1 / AT-1smartprint ECG Unit

SERVICE HANDBOOK Issue b June 2001

Chapter 1

Operating Elements

Art.No. 2.540022

Introduction

The AT-1 / AT-1 smartprint is a 3-channel ECG recorder with all (12) ECG signals simultaneously processed to provide instant ECG recordings. Three automatic recording modes - two for the internal printer and one for the external printer - can be individually preset to enable one button ECG recording of preferred print formats.

Individual lamps are provided to give power , paper error , filter , lead group and lead off indications. In addition, any detected disturbance (i.e. loose electrode or end of paper), gives an audible alarm and the corresponding indicator lamp flashes.

The AT-1 / AT-1 smartprint includes the following features:

• Low weight and compact dimensions

• 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

• Automatic or manual recording modes

• Selectable printing formats - external and internal printer

• Interpretation program option (including measurements) for children and adults

• Choice of 10 languages (AT-1) and 9 languages (AT -1 smartprint) for printing.

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 unit should not be placed near X-ray or diathermy units, large transformers or motors. The unit must be placed on a flat surface and must not be operated in areas where there is any danger of explosion.

Power Supply

The mains connection is on the rear of the unit. The mains indicator lamp on the 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 gives approximately 2 hours of normal use. The unit can remain connected to the mains supply without any danger of damage to either the battery or the unit.

SCHILLER AT-1 / AT-1smartprint ECG Unit

SERVICE HANDBOOK Issue b June 2001

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

The unit is automatically switched off after 5 minutes (30 seconds if battery capacity is limited) if no key is pressed and the patient cable is not connected.

Potential Equalisation

If the A T-1 / AT-1 smartprint is used in conjunction with other patient connected equipment, we recommend that the potential equalisation stud on the rear of the unit is connected to the building common ground with the yellow/green ground cable (Part-no. 2.310005). When working from an emergency vehicle, the vehicle common ground can be used.

WARNING !

THE UNIT MUST BE GROUNDED WHEN THE EXTERNAL PRINTER IS CONNECTED.

Art.No. 2.540022

The Keyboard

SCHILLER AT-1 / AT-1smartprint ECG Unit

SERVICE HANDBOOK Issue b June 2001

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

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

and then

Art.No. 2.540022

Press electrode dc offsets. Best results are obtained when the electrode voltage

readings (right column) are between +50mV and - 50mV . Filter On/Off Press

System Configuration Press

settings.

to switch the (Myogram) filter On / Off.

for print-out of

to print system

Modes of Operation

Automatic Mode

a. without external printer connected or printer switched off Automatic Mode provides a printout giving 10 seconds of ECG recording of all 12 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:

• Lead Format

• 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:

• Lead Group

• Chart Speed

• Sensitivity

• Myogram Filter

For further information see paragraph `Manual Mode` on page 19.

Automatic Mode

a. without external printer connected or printer switched off In automa tic m ode, 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.

SCHILLER AT-1 / AT-1smartprint ECG Unit

SERVICE HANDBOOK Issue b June 2001

When the AUTO GAIN key 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)

To obtain an extra printout of the ECG recording in Format 1, simply press the COPY key:

is pressed before recording in automatic mode, the

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

Art.No. 2.540022

entitled ' Automatic Mode (ECG) Settings` later in this chapter .

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.

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.

SCHILLER AT-1 / AT-1smartprint ECG Unit

SERVICE HANDBOOK Issue b June 2001

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 T o re-centr e the ECG traces, press the 1mV key

Art.No. 2.540022

Settings

Each parameter is set by means of a code. This code comprises a combination of keys starting with the ALT key followed by two or three numbers. The setting is confirmed with the ST OP key. As soon as the ALT key is pressed, the keyboard is dedicated to the programming function.

Note: The Alternative (ALT) function is only active for 4 seconds. If a programming

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

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

ALT - 0 - 2 - 2 - STOP.

On the following pages the programmable parameters and the programming sequences are described in detail.

Settings (cont.)

The defined formats and settings for your unit can be checked as follows:

A printout of the defined settings will be produced and gives the following information, depending on the installed software.

SCHILLER AT-1 / AT-1smartprint ECG Unit

SERVICE HANDBOOK Issue b June 2001

ALT - 0 - 1 - any number

Unit designation Software version, Software option installed (C =

Interpretation) and interpretation version Serial number Serial number of the unit Leads Standard (S) or Cabrera (C) ECG Format Long (ooo), Short (o) or Suppressed (-) M ECG Average cycles as defined in auto ECG recording setup

(e.g. 4 * 3 (25 mm/s) + 2) Measurements Enabled (+) or Suppressed (-) Marks E n a b l e d (+ ) o r Su ppressed (-) Interpretation Enabled (+) or Suppressed (-) Selected Rhythm leads Leads selected for R1 and R2 Automatic Centering Enabled (+) or Suppressed (-) Paper type Z-folded Pr intout of signal s Sequential or Simultaneous Baseline Filter 0. 0 5 , 0 . 1 5 o r 0 .3 0 H z Mains Filter 50, 6 0 Hz o r OFF ( -) Myogram Filter 25 or 35 H z, O N (+ ) or OFF (-) Interpretation settings: N/A: + /- ‘no rmal/a bno rma l’ i s wr itten (+) or

suppressed (-)

U:+/- ‘unconfirmed report’ is written (+) or

suppressed (-)

A30:+/- patient age is assumed to be < 30 (-)

or >30 (+)

S: +/- low (-) or high (+) sensitivity

Art.No. 2.540022

Settings (cont.)

Default Settings

To reset the unit to the basic default settings, proceed as follows:

ALT - 0 - 6 - 6

SETTINGS S = STANDARD M = MEASUREMENTS

LANGUAGE AS SET AS SET AS SET

LEADS STANDARD (S) STANDARD (S) STANDARD (S)

ECG: 25MM/S, SHORT (O)

AUTO FORMAT 1

PATIENT DATA FORM ENABLED +

ECG: 25MM/S, LONG (OOO)

AUTO FORMAT 2

PATIENT DATA FORM ENABLED +

RHYTHM LEADS V1, II V1, II

AUTOM.

CENTERING

PAPER Z - FOLD Z - FOLD Z - FOLD

PRINTOUT OF

SIGNALS

BASELINE FILTER

SETTING

MAINS FILTER

SETTINGS

MYOGRAM FILTER SETTING

INTERPRETATION

SETTINGS

EXTERNAL PRINTER

ENABLED (+) ENABLED (+) ENABLED (+)

SEQUENTIAL SEQUENTIAL SEQUENTIAL

0.05HZ 0.05HZ 0.05HZ

50HZ (60HZ) 50HZ (60HZ) 50HZ (60HZ)

35HZ, OFF (-) 35HZ, OFF (-) 35HZ, OFF (-)

ECG: 25MM/S, SHORT (O)

PATIENT DATA FORM ENABLED +

ECG : 25MM/S, SHORT (O) ECG : 25MM/S, SHORT (O)

M ECG :6*2 (50MM/S + 1) M ECG: 6*2 (50MM/S + 1)

MEASUREMENTS: SUPRESSED (-)

MARKS: ENABLED (+) MARKS: ENABLED (+)

ECG : 25MM/S, LONG (OOO)

M ECG: - - M ECG: NONE

MEASUREMENTS: SUPRESSED (-)

MARKS: ENABLED (+) MARKS: ENABLED (+)

ECG : 25MM/S, SHORT (O) ECG : 25MM/S, SHORT (O)

M ECG: 6*2 (50MM/S) + 2 M ECG: 6*2 (50MM/S) + 2

MEASUREMENTS: SUPRESSED (-)

MARKS: ENABLED (+) MARKS: ENABLED (+)

C = WITH

INTERPRETATION

MEASUREMENTS: SUPRESSED (-)

INTERPRETATION: ENABLED (+)

ECG : 25MM/S, LONG (OOO)

MEASUREMENTS: SUPRESSED (-)

INTERPRETATION: DISABLED (-)

N/A: SUPRESSED (-)

U: ENABLED (+)

A30: UNDER THIRTY (- )

S: LOW (-)

MEASUREMENTS: SUPRESSED (-)

INTERPRETATION: ENABLED (+)

Settings (cont.)

Language

The language is selected as follows:

SCHILLER AT-1 / AT-1smartprint ECG Unit

SERVICE HANDBOOK Issue b June 2001

Language Selection AT-1

Entry Key Sequence Language Confirm

1 German

2 English

3 French

4 Swedish

ALT 0 2

5 American

6 Italian

7 Spanish

8 Portugese

9 Dutch

0 Russian

STOP key

Press

Language S election AT-1 smartprint

Entry Key Sequence Language Confirm

1 German

2 English

3 French

4 Swedish

ALT 0 2

5 American

6 Italian

7 Spanish

8 Portugese

9 Dutch

Confirm the selection by pressing

Notes: The difference between English and American is the mains filter setting -

English = 50Hz; American = 60Hz and the physical units.

Press

STOP key

Art.No. 2.540022

Settings (cont.)

Filters

There are three different filters which can be set individually as follows:

• Baseline filter

• Mains filter

• Myogram filter

Baseline Filter

The digital Baselin e fi lte r suppresses excessive baseline drifts. The setting options are as follows:

Baseline Filter

Entry Key Sequence Filter Setting Confirm

ALT 5

0 0.05 H z (default)

1 0.15 Hz

3 0.30 Hz

Press STOP

key

Confirm the selection by pressing

Note: The set value is the lower limit of the frequency range and is normally set to

0.05 Hz. The settings 0.15 and 0.30 Hz should only be used when absolutely necessary , as the possibility exists that they could affect the original ECG signal, especially the ST segments.

Mains Filter

The Mains filter is an adaptive digital interference filter designed to suppress AC interference without attenuating or distorting the ECG.

Set the mains filter in accordance with the frequency of your local mains supply as follows:

Mains Filter

Entry Key

Sequence

ALT 8

Filter Setting Confirm

5 Mains Filter 50 Hz

6 Mains Filter 60 Hz

9 Mains Filter Off

Press STOP

key

Settings (cont.)

Myogram Filter

The Myogram filter suppresses disturbances caused by strong muscle tremor. The set value will be the new upper limit of the frequency range as soon as the FILT ER key is pressed on or programmed as default when the unit is switched on. When the Myogram filter is on, the value, i.e. 35 Hz is displayed on the bottom line of the printout.

Entry Key Sequence Setting Confirm

SCHILLER AT-1 / AT-1smartprint ECG Unit

SERVICE HANDBOOK Issue b June 2001

Myogram Filter

2 Myogram Filter 25 Hz

3 Myogram Filter 35 Hz

ALT 8

Myogram Filter active when the unit is first

switched on (marked on printout with +)

Myogram Filter off when the unit is first

switched on (marked on printout with - )

Press STOP

key

Confirm the selection by pressing the STO P key

The myogram filter is switched on and off manually with the FILTE R KEY

Note: An ECG recorded in auto mode is stored unfiltered. It is therefore possible to

print the stored ECG either with or without passing the myogram filter. Filter ON is indicated in the bottom information line of the printout. When theFILTER key is pressed again, the filter is switched off and the `35 Hz` indication on the bottom information line of the printout is removed. The cutoff frequency of the myogram filter is set to either 25 or 35 Hz.

Art.No. 2.540022

Settings (cont.)

Defining Lead Sequence & Printout

The required settings can be selected as follows:

Sequences, Print & Auto-centering

Entry Key Sequence Definition Confirm

1 Standard Lead Sequence

2 Cabrera Lead Sequence

3 Simultaneous Print

ALT 7

Confirm the selection by pressing the STOP key

4 Se quential Print

5 Auto-centering ON

6 Auto-centering OFF

7 Z-fold paper

Press STOP

key

The selectable printout forms are: Simultaneous All ECG le ads are printed in the same time segment ( in

automatic mode only).

Sequential Each group is a contiguous time segment of approximately

2.5 or 5 seconds (in automatic mode only).

Auto-Centering ON All ECG traces are centred dynamically for optimal use of

paper width.

Auto-Centering OFF ECG traces are set to a fixed baseline position and may

possibly overlap.

The Standard and Cabrera lead groups available for the AT-1 / AT-1smartprint are:

Lea d Groups

Standard Cabrera

I aVR V1 V4 aVL II V1 V4

II aVL V2 V5 I aVF V2 V5

III aVF V3 V6 -aVR III V3 V6

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