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AT-1 / AT-1smartprint ECG unit

1. CE 0123 Type CF equipment safe for internal applications NOTE The paddles indicate that the equipment is defibrillator proof ON OFF 93 42 EEC Medical Devices 0123 Notified Body TUV PS SC HILLER AT 1 AT 1smartpnnt ECG Unit SERVIC E 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 amp Power 13 The Keyboard 14 AT 1 AT 1smartprint Short Form Operating Instructions 15 Manual ECG Recording intemal printeronly 15 System Configuration 15 Automatic ECG Recording with extemal printer connected and switched on 15 with extemal printer NOTconnected or switched off 15 Modes of Operation 16 Automatic Mode 16 ManualMode 16 Automatic Mode 17 a without extemal printer connected or printer switched off 17 b with extemal printer 18 Settings 20 Default Settings 22 language 23 Filte rs 24 Baseline Filter 24 Mains Filter 24 Myogram Filter 25 Defining Lead Sequence amp Printout 26 Acoustic QRS Indication 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 A
2. SC HILLER AT 1 AT 1smartpnnt ECG Unit SERVIC E HANDBOOK Issue b June 2001 Replacing the Recording Paper in the Internal Printer The recording papermustbe replaced assoon asthe end ofthe paperisindicated by a red stripe on the lower edge After the indication first appears there are about 8 pages left However we recommend that the paper be replaced immediately If no paper is left the printing process is interrupted and the paper waming lamp starts to blink To replace the paperproceed asfollows Pressthe latch forthe papertray to release the lid with the rubber roller e Remove any remaining paperfrom the papertra y Placea new paperpackinto the papertray with the printed grid side facing upwards Close the lid and press firmly until release catches Press the STOP key to transport the paper to the start position SC HILLER can only guarantee perfect printouts when SCHILLER original chart paperor chartpaperofthe same quality is used Art No 2 540022 SCHILLER Thermal Paper Ha ndling 38 The thermal paperused in the AT 1 AT 1smartprint requires slightly different handling to normal paperasitcan reactwith chemicalsand to heat However when the following points are remembered the paper will give reliable results The following points apply to both storage and when archiving the results 1 Before use keep the paper in its original cardboard cover Do not remove the cardboard cov
3. Any adjustments special checks or functional procedures that are required during a procedure are detailed in the relevant step In text diagrams support the text where required and provide location details of connectors test points and adjustment potentiometers Specific wamingsand cautionsare given where applicable Wa mings indicate potential danger that could cause personal injury Cautions indicate areas that could cause damage to the equipment If a key operation or menu selection is required the key sequence required is given in bold letters The character or character string given is the actual character that is printed on the key When a key sequence is provided it must be followed in the order given 53 Art No 2 540022 SCHILLER Wa mings and Cautions 54 WARNINGS BEFORE COMMENCING ANY REMOVAL OR REPLAC EMENT PROC EDURES ENSURE THAT THE MAINS POWER SUPPLY IS SWITC HED OFF AND THAT THE MAINS CABLE IS REMOVED CERTAIN C HEC KS AND ADJ USIMENTS CAN ONLY BE CARRIED OUT WITH THE TOP ASSEMBLY REMOVED AND WITH MAINS CONNECTED WHEN CARRYING OUT THESE PROCEDURES BEWARE THAT POTENTIALLY LETHAL VO LTAG ES ARE PRESENT CAUTIONS THE AF1 AFISMARTPRINT CONTAINS STATIC SENSITIVE CMOS COMPONENTS OBSERVE ANTISTATIC PRECAUTIONS WHEN CARRYING OUTANY MAINTENANCE PROC EDURES ALWAYS PLACE THE UNITON AN EARTHED ANTISIATIC MAT PERSONNEL MUST BE EARTHED WHEN HANDLING ANY BOARDS OR COMPONENTS ALWAYS USE A
4. Note Lead selection for the rhythm lead s is defined on page 33 Average Cycles interpretation option only Internal printer No average lead cycles are printed 4 x 3 25 mms The average complexes are printed in 4 groups of three leads at a chart speed of 25mm s P STOP 4 x 3 50 mms The average s 7 complexes are printed in 4 groups of ALT lor2 2 three leads at a chart speed of 50mm s 6 x 2 50 mnys 1 rhythm lead 25mm s The average complexes are printed in 6 groups of two leads at a chart speed of 50mm s 12 x 1 25 mm s 2 rhythm leads 25mm s The average complexes are printed out for all 12 leads at a chart speed of 50mm s 26 SC HILLER AT 1 AT 1smartpnnt ECG Unit SERVIC E HANDBOOK Issue b June 2001 Automatic Mode ECG settings Intemal Printer cont Measurements and Markings M and C versions only To define the measurements and markings proceed as follows Measurements M and C wm mm Only Internal printer Entry Key Sequence printout S are added to the ECG average cycles Detailed table of measurement results omitted however the values of electrical axes intervals and heart rate are not suppressed lunt nl table of measurement results is TOL lunt nl Press STOP key DE Referenece markings are omited markings are omitted Reference markings beginning and end of P wave and QRS and end of T wave Interpretation C version only To print or suppress interpretation statements
5. MEASUREMENTS SUPRESSED MEASUREMENTS SUPRESSED MARKS ENABLED MARKS ENABLED INTERPRETATION ENABLED ECG 25MM S LONG OOO ECG 25MM S LONG 000 ECG 25MM S LONG 000 FILTER SETTING M ECG M ECG NONE MEASUREMENTS MEASUREMENTS AUTO FORMAT 2 SUPRESSED SUPRESSED PATIENT DATA FORM EE MARKS ENABLED MARKS ENABLED INTERPRETATION DISABLED RHYTHM LEADS V1 Il V1 II AUTOM CENTERING ENABLED ENABLED ENABLED PAPER Z FOLD Z FOLD Z FOLD PRINTOUT OF SIGNALS SEQUENTIAL SEQUENTIAL SEQUENTIAL BASELINE FILTER SETTING 0 05HZ 0 05HZ 0 05HZ MAINS FILTER PETING 50HZ 60HZ 50HZ 60HZ 50HZ 60HZ MYR AM 35HZ OFF 35HZ OFF 35HZ OFF N A SUPRESSED U ENABLED PATIENT DATA FORM ENABLED INTERPRETATION SETTINGS A30 UNDER THIRTY S LOW ECG 25MM S SHORT O ECG 25MM S SHORT 0 ECG 25MM S SHORT O M ECG 6 2 50MM S 2 M ECG 6 2 50MM S 2 MEASUREMENTS MEASUREMENTS EXTERNAL EE SUPRESSED SUPRESSED MARKS ENABLED MARKS ENABLED INTERPRETATION ENABLED Settings Cont language The language is selected asfollows SC HILLER AT 1 AT 1smartprint ECG Unit SERVIC E HANDBOOK Issue b June 2001 Entry Key Sequence Language Selection AT Language Confirm Entry Key S
6. Any liability forsubsequent damage isexcluded The waranty is void if una uthorized orunqualified personsattempt to make repairs In case of a defect contact yourdealerorthe manufacturer The manufacturercan only be held responsible forthe safety reliability and performance ofthe apparatus if assembly operations extensions rea djustments modifications orrepairsare carried outby personsauthorized by him and the ECG unitand approved attached equipmentare used in accordance with the manufacturers instructions THERE ARE NO EXPRESS OR IMPLIED WARRANTIES WHIC H EXTEND BEYOND THE WARRANTIES HEREINABOVE SET FORTH SC HILLER MAKES NO WARRANTY OF MERC HANTABILITY OR FITNESS FOR A PARTICULAR PURPO SE WITH RESPECT TO THE PRODUCT OR PARTS THEREOF Physicians responsibility THIS UNIT IS PROVIDED FOR THE EXC LUSIVE USE OF QUALIFIED PHYSIC IANS OR PERSONNEL UNDER THEIR DIREC T SUPERVISIO N THE NUM ERIC AL AND GRAPHIC AL RESULTS AND ANY INTERPRETATIO N DERIVED FROM A RECORDING MUST BE EXAMINED WITH RESPECT TO THE PATIENTS OVERALL CLINIC AL CONDITION THE RECORDING PREPARATION QUALITY AND THE G ENERAL REC O RDED DATA QUALITY WHIC H C OULD EFFEC T THE REPORT DATA AC C URAC Y MUSTALSO BE TAKEN INTO ACCOUNT IT IS THE PHYSICIANS RESPONSIBILITY TO MAKE THE DIAGNOSIS OR TO OBTAIN EXPERT OPINION ON THE RESULTS AND TO INSTITUTE C ORREC T TREATM ENT IF INDIC ATED SC HILLER AT 1 AT 1lsmartonnt ECG Unit SERVIC E HANDBOOK Issue b Jun
7. Position the Top Housing in front of the Base Assembly and without straining the ribbon cable plug in the interconnecting cable from the keyboard to the main board MK11 10 See picture nextpage Note It may be necessary to tilt the Top Housing forthe cable assemblies to reach 5 Tum the Top Housing slightly counter cloc kwise and lift itover the paper tray lid 6 Carefully position the Top Housing on the Base Assembly and close the paper tray lid 7 Grasping the Top Housing and the Base Assembly to ensure that they cannot part carefully tum the unit upside down and replace the six securing screws and washers in the extreme comers and edges of the unit Retum the unit to the upright position 8 Carry out the functional check procedure detailed in Chapter 3 57 Art No 2 540022 SCHILLER Physic al Overview Keyboard connector Printer motor Patient connector NE lt lt SEH Gu Wi NU TM ir i JN ugin i PME Wa A 1 UNT m UNI View of the unit with the ECG interface board lifted upp di C2 6 SC HILLER AT 1 AT 1lsmartonnt ECG Unit SERVIC E HANDBOOK Issue b J une 2001 ECG Interface Board MK 11 2 The ECG Interface is mounted above the Control and Power Supply board MK 11 10 and is secured to six spacers Prerequisites The Wamingsand Cautionsatthe beginning of the Chaptermustbe observed The top housing mustbe removed asdetailed on page 56 All extemal cable assemblies
8. Fax 33 3 88 94 12 82 Germany SC HILLER Medizintechnik GmbH Rudolf Diesel Strasse 14 D 85521 Ottobrunn Germany Tel 4989 629 9810 Fax 4989 609 509 0 India SC HILLER 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 Fa x 9122 826 3525 Italy ESAO TE Spa SCHILLER Via di Caciolle 15 1 50127 Firenze Italy Tel 39055 4229 201 Fax 39055 4229 208 Switzerland SC HILLER Reomed AG Riedstrasse 14 CH 8953 Dietikon Switzerlan Tel 411 744 3000 Fax 411 740 3710 Allother SC HILLER AG Altgasse 68 CH 6341 Baar Switzerland countries Tel 4141 766 4242 Fax 4141 761 0880 Home Page www schillerch The SCHILLER sales and service centre network is worldwide For the address of your local distributer contact your nearestSchiller subsidiary In case of difficulty a complete listof all distributers and subsidiaries is provided on our internet site or can be supplied from our head office Art No 2 540022 SCHILLER Wa rra nty Terms of Warranty The SCHILLER ALL A 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 accidentorasa resultofimproperhandling The warranty entitles free replacementofthe defective part
9. M ECG Measurements Marks Interpretation Selected Rhythm leads Automatic Centering Paper type Printout of signals Baseline Filter Mains Filter Myogram Filter Interpretation settings Art No 2 540022 Software version Software option installed C Interpretation and interpretation version Serial number of the unit Standard S or Cabrera C Long 000 Short o or Suppressed Average cyclesasdefined in auto ECG recording setup e g 4 3 25 mm s 2 Enabled orSuppressed Enabled orSuppressed Enabled orSuppressed Leadsselected forR1 and R2 Enabled orSuppressed Z folded Sequential orSimulta neous 0 05 0 15 or0 30 Hz 50 60 Hz or OFF 25 or 35 Hz ON or OFF N A normal abnomal is written or suppressed U unconfirmed report is written or suppressed A30 patientage is assumed to be 30 or gt 30 S low or high sensitivity 1586 SCHILLER settings cont Default Settings Ze To reset the unit to the basic default settings proceed as follows ALT 0 6 6 C WITH SETTINGS S STANDARD M MEASUREMENTS ORDEI LANGUAGE AS SET AS SET AS SET LEADS STANDARD S STANDARD S STANDARD S AUTO FORMAT 1 ECG 25MM S SHORT O ECG 25MM S SHORT O ECG 25MM S SHORT O M ECG 6 2 50MM S 1 M ECG 6 2 50MM S 1 PATIENT DATA FORM ENABLED
10. NOTINDEFINITE OLD PAPER PAPER THAT HAS NOT BEEN STORED IN A COOL DAMP FREE ENVIRONMENT OR PAPER THAT HAS BEEN EXPO SED TO EXC ESSIVE HEAT C AN ADVERSELY EFFEC T THE QUALITY OF THE PRINT Printhead Alignment and Printhead Tension The printhead tension the pressure that the printhead exerts on the printer paper is achieved with two springs exerting pressure on the printhead the printhead tension cannotbe adjusted Similarly printhead alignmentis fixed and cannotbe adjusted If the printhead tension orprinthead alignmentisnotcormect change the papertray and printer assembly Possible Printer Problem Internal Thermoprinter Corrective Action Paper jams or does not stop at Clean paper mark detector with a 70 alcohol correct position solution See page 60 Allow to dry completely Ensure that good quality fresh paper is installed Change the Printer Motor see page 60 61 Printout uneven Fading at top or Check evenness of spring pressure of the printer bottom to roller by pulling a sheet of paper through Check roller for wear and symmetry Clean printhead pixel array with alcohol Ensure that good quality fresh paper is installed Faulty pixel Clean printhead pixel array with alcohol Replace printer Printout too faint or too dark Clean printhead pixel array with alcohol General quality poor Ensure that good quality fresh paper is installed 49 Art No 2 540022 SCHILLER Printer Check 50 E
11. OF LEAKAGE CURRENTS WHEN OPERATING SEVERAL DEVIC ES FOR MEDICAL AND NO N MEDIC AL APPLICATION DO NOTUSE ANY EXTENSION CABLES OR DISTRIBUTION BO XES FOR THE CONNECTION EARTH MUST BE CONNEC TED WHEN THE EXTERNAL PRINTER IS USED Art No 2 540022 SCHILLER 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 PRESENC E OF FLAMMABLE GASES SUC H AS ANAESTHETIC AGENTS THIS PRODUCT IS NOT DESIG NED FOR STERILE USE THIS PRO DUC TIS NOT DESIGNED FOR OUTDOOR USE DO NOT UNDER ANY CIRC UMSIANCES IMMERSE THE UNIT OR CABLE ASSEM BUES IN UQ UID DO NOT USE HIGH TEMPERATURE STERILISATION PROCESSES SUCH AS AUTOCLAVING DO NOT USE E BEAM OR GAMMA RADIATION STERILISATION THIS UNIT IS CF 9 CLASSIFIED ACCORDING TO IEC EN 60601 1 THIS MEANS THAT THE PATIENT CONNECTION IS FULLY ISOLATED AND DEFIBRILLATION PROTEC TED SC HILLER CAN ONLY GUARANTEE PROTEC TION AGAINST DEFIBRILLATION VOLTAG E HOWEVER WHEN THE ORIGINAL SC HILLER PATIENT C ABLE IS USED DO NOTTOUCH THE CASING DURING DEFIBRILLATION IF THE PATIENT CABLE SHOULD BECOME DEFECTIVE AFTER DEFIBRILLATION LEAD OFF WILL BE DISPLAYED AND AN ACOUSTIC ALARM GIVEN SC HILLER AT 1 AT 1smartpnnt ECG Unit SERVIC E HANDBOOK Issue b June 2001 What is in this book THE SERVIC E PHILO SO PHY FOR ALL SC HILLER UNITS IS FAULTFINDING TO MODULE LEVEL ONLY
12. VR2 to achieve a voltage difference of 4000 mV 2 mV Ze J hd Len Say d 9 ge Wn JA dok dERE E 3 e 4 bali i Cira Als r dag d Inh a WW tr LEE I T KK BR h LAL j a er de ES A es Eus uer ZSA AT G Se ER sta dn me H CR xd LX Je D E Qs d CG r CZ ue reri DOTE WM ito B e Pie a i Erf Tente ee a AE toa Vesela ce e as p acm e Ee T MS E 232 F Mes Al SR z Ton N e USE i a d e 8 EEEO E i ALONE EE I on d i di tl d d D SES Oper amp U100 Pin 1 low left Obtain a service pnntout by pressing ALT 0 3 any key Ensure thatthe Uref and the Uref measurements are both 2000 mV 20 mV Ensure the the Udiff reading is 4000 mV Adjust VR3 to achieve a Udiff reading of 4000 mV 20 mV Reassemble the unitasdetailed in Chapter4 Recheckthe voltage by again obtaining a service printout 73 Art No 2 540022 SCHILLER SC HILLER AT 1 AT 1lsmartonnt ECG Unit SERVIC E HANDBOOK Issue b June 2001 Chapter 6 Spare Parts 49 Art No 2 540022 SCHILLER Ordering Information Your local representative stocks all the disposables and accessories available for the AT1 AF1smartprint In case of difficulty or to obtain the address of your local dealer please contactthe head office Ourstaff will be pleased to help process yourorderor to provide any details for all SCHILLER products The address foradv
13. X Art No 2 540022 SCHILLER 10 Automatic Mode ECG Settings Interpretation Settings C version only Selecting Rhythm Leads Service Printout Installing Software Options Care amp Maintenance Replacing the Recording Paper in the Internal Printer Thermal Paper Handling CHAPTER 2 FUNCTIONAL OVERVIEW Main Board MK 11 10 CHAPTER 3 FAULT DIAGNOSIS Fault Diagnosis Chart General Functional Check Procedures Internal Printer Check CHAPTER 4 MODULE REMOVAL AND REPLAC EM ENT Warnings and Cautions Physical Overview Opening the Case Top Housing Replacement Physical Overview ECG Interface Board MK 11 2 Printer Tray Assembly and Thermal Printer Thermal Printer Removal Control and Power Supply Board MK 11 10 Battery Pack Keyboard CHAPTER 5 ADJUSTMENTS Introduction Warnings Cautions and Conditions Test Equipment Battery Charge Voltage ECG Amplifier Reference Voltage CHAPTER 6 SPARE PARTS Ordering Information Spare Parts CHAPTER 7 TECHNICAL DATA Technical Data Index 32 32 33 34 35 36 37 38 39 42 45 46 48 49 51 54 55 56 57 58 59 60 61 62 64 66 67 68 69 70 71 72 75 76 17 79 80 83 SC HILLER AT 1 AT 1lsmartonnt ECG Unit SERVIC E HANDBOOK Issue b June 2001 Chapter 1 Operating Elements 11 Art No 2 540022 SCHILLER Introduction 12 The AT 1 A 1 smartprint is a 3 channel ECG recorder with all 12 ECG signals simul
14. connected or printer switched off Automatic Mode provides a printoutgiving 10 secondsofECG recording ofall12 leads with a choice of 2 different formats only for S version The following can be programmed freely foreach of the 2 formats before recording ead Format ChartSpeed With the optional interpretation program installed itis also possible to selectthe measurementtable average cycles with optional markingsand interpretation statements for the printout Forfurther information see paragraph Automatic Mode ECG Settings on page 28 b with external printer connected and switched on Only one Automatic Mode format possible Otherdetails as above For further infomation see paragraph Automatic Mode ECG Settings on page 30 Manual Mode ManualMode providesa realtime print outof 3 selected leadsand isonly possible on the intemal thermal printer The following can be freely selected before orduring recording Lead Group ChartSpeed Sensitivity Myogram Filter Forfurther information see paragraph ManualMode on page 19 SC HILLER AT 1 AT 1smartpnnt ECG Unit SERVIC E HANDBOOK Issue b June 2001 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 needsand requirements When the AUTO GAIN key Ka is
15. disconnected Tools Posi drive screwdriver e Spring compressor or pliers Part Numbers The part numbers for the Thermal Printer Assembly the printhead and the motor are given in Chapter6 Reta ining Screws E Papermark detector F Printer motor CAUTION THE THERMAL PRINTER CONTAINS STATIC SENSITIVE COMPONENTS OBSERVE ANTISTATIC PREC AUTIO NS Printer Paper Tray Assembly Removal 1 Remove the following connectors from the Control and Power Supply Board MK 11 10 data connector to the thermal printer A papermark connector B printer motor connector C earth connector to the printhead D 2 Unscrew the four retaining screws and remove the complete papertray printer assembly Printer Paper Tray Assembly Replacement 1 Position and secure the assembly in the base with the four retaining screws 2 Reconnectthe following connectors to the Control and Power Supply Board MK 11 10 data connector to the thermal printer A papermark connector B printer motor connector C earth connector D 3 Replace the Top Housing see page 57 SC HILLER AT 1 AT 1smartpnnt ECG Unit SERVIC E HANDBOOK Issue b J une 2001 Thermal Printer Removal 1 Remove the top housing and the printer tray assembly as outlined above 2 Tum the printer papertray assembly upside down and unscrew the two printer retaining screws 3 Gently remove the printhead taking care to retain the two ten
16. expected are as follows With patientconnected 100mV With patient simulator connected 20 mV This will depend on the patientsimulatorused and mustbe taken asa flexible measurement With all electrodes shorted together 20 mV No patientcable connected 350 to 450mV This is the measured ambient temperature thatthe processor uses to correct print quality This reading should be ambienttemperature 5 This is the checksum for the EPROM Its value varies from one software version to another SC HILLER AT 1 AT 1smartpnnt ECG Unit SERVIC E HANDBOOK Issue b J une 2001 Insta lling Softwa re Options To upgrade the AT 1 AT 1 smartprint for example from standard to M version type the following ALT 0 4 followed by the upgrade code obtainable from SCHILLER Acceptance of the code isindicated by a series of beeps CAUTION MORE THAN 10 UNSUC C ESSFUL ATTEM PTS TO ENTER THE CODE BLOC KS THE UNIT 35 Art No 2 540022 SCHILLER Care amp Maintenance 36 12 Monthly Check The unit should undergo a technical safety check every 12 months This safety check should include the following e Visual inspection of the unt and cables Electrical safety tests according to IEC 601 1 Clause 19 e Functional tests according to Chapter 3 The test results mustbe documented Cleaning the Casing CAUTION SWITCH THE UNIT OFF BEFORE CLEANING AND DISCONNECT THE MAINS AND THE EXTERNAL P
17. on an antistatic matand antistatic precautions observed when any maintenance is camed out on the AT 1 AT 1 smartonnt The room temperature should be between 18 and 28 C Tools and Equipment Digital Multimeter e Small flatbladed screwdriver e Resistor2 7 kOhms 250 mW Procedure The battery charge voltage is nominally 13 5 V with a nominal maximum current of approximately 5 mA Adjustand check asfollows e DISCONNECTTHE MAINS SUPPLY e Disassemble the unitas detailed in Chapter 4 and remove the ECG interface board MK11 2 Remove the two battery connectorsand connecta 2 7 kOhm 250 mW resistor across the two connectors TP12 and TP13 to simulate a discharged battery Connect the digital multimeter across the resistor Connectthe mains supply WARNING EXERC ISE C ARE BEWARE THAT PO TENTIALLY LETHAL VOLTAG ES ARE PRESENT e Adjust VR4 to obtain a charging voltage of 13 5 V Disconnectthe mains supply and reassemble the unitas detailed in Chapter 4 TP 12 TP 13 TR 1 emu af H adl a EI vd HHC 2 22 LE a de Lars OUTRE TS te 2 4 E x7 EJ EI a re gt i EI ATETEA MIN seat ET S 1 At i Ce tet at txt ST 4 Apa st e IS 5 GEAR sin 2 se Z ma Battery Charge Voltage VR4 7 Art No 2 540022 SCHILLER EC G Amplifier Reference Voltage The 2 V voltage rails generated on the ECG interface board are used asa reference by the measur
18. on the printout proceed as follows Interpretation Inte Option Only Internal printer Entry Key Sequence Printout EX ALT lor2 4 Press STOP key E Interpretation is printed Confirm the selection by pressing the STOP key Full details of the interpretation option are given in the SCHILLER ECG Measurement and Interpretation booklet art No 2 510 179 29 Art No 2 540022 SCHILLER Automatic Mode ECG settings External Printer One Auto format can be defined for the extemal printer in the AT 1smartprint When defining the auto format the key sequence ALT 9 precedes the setting The automatic mode fomatis detailed on the following pages The ECG formatissetas follows ECG Format External printer Entry Key Sequence Printout Confirm l 1 page A4 with 12 leads at 25mm s 1x12 2 One page with the first 8 leads printed for 5s and the last 4 leads printed for 10s 5 No leads printed 6 1 page A4 with 12 leads printed in short form 2x6 ALT 9 1 7 2 pages A4 each with 6 leads printed in long form 6 6 Press STOP key 8 Chart Speed 25mm s 9 Chart Speed 50mm s 0 1 page A4 with 4 groups of 3 leads 4x3 at 25mm s 1 rhythm 25mm s Average Cycles The Average cycles are defined as follows Note Lead selection for the rhythm lead s is defined on page 33 Average Cycles interpretation option only External printer No average lead cycl
19. 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 7 At si Depending upon which option is included the printout gives the following e ECG recording ofall leadsin either Standard or Cabrera format according to selection Sensitivity e HeartRate Speed Filter Settings nterpretation statements with option C Average Cycles with options M C Intervals with options M C e Axes with options M C Detailed Measurement Table with options M C To obtain an extra printoutofthe ECG recording in Format 1 simply pressthe COPY key To obtain an extra printout of the second format press the ALT key followed by the LAB Note The Auto mode settings for the two formats are detailed in the paragraph entitled Automatic Mode ECG Settings later in this chapter COPY key Art No 2 540022 SCHILLER Automatic Mode b with external printer With the extemal printer connected and switched on only one Auto Mode fomat selectable is available To start the automatic ECG recording in Automatic Mode press the AUTO START key For further inf
20. CABLE ASSEM BLIES THE PROC EDURAL STEPS GIVEN FOR EACH MODULE MUST BE FOLLOWED IN THE ORDER GIVEN THE OUTER SURFACES OF THE AF1 AF1 SMARTPRINT ARE SUSCEPTIBLE TO ABRASION DAMAGE TO PREVENT SC RATC HING ALWAYS PLACE ON A SOFT NON ABRASIVE C LOTH Conditions The unitmustbe placed on an antistatic matand antistatic precautions observed when any maintenance iscarried outon the AT 1 AT 1smartprint The room temperature should be between 18 and 28 C Note When a key operation ormenu selection is required in the following procedures the key sequence required isgiven in bold letters The character orcharacter string given is the actual character or character string printed on the key 69 Art No 2 540022 SCHILLER Test Equipment The following proprietary and dedicated test equipment is required to fault find and carry outall board checks and adjustments on the AT 1 AT 1smartprint The list of proprietary equipment is not comprehensive Recommendations of suitable proprietary testequipmentcan be obtained from the SCHILLER Service Department Proprietary Test Equipment Tools Digital Multimeter e Standard tool kit with a selection of flat oladed and posi drive screwdrivers pliers and general tools Resistor2 7 kOhms 250 mW 70 SC HILLER AT 1 AT 1smartpnnt ECG Unit SERVIC E HANDBOOK Issue b June 2001 Battery Cha rge Voltage Precautions and Requirements The unit mustbe placed
21. N ANTISTATC BAG WHEN TRANSPORTING BOARDS OR COMPONENTS THE UNIT IS SUSC EPTIBLE TO ABRASION DAMAGE TO PREVENT SC RATC HING ALWAYS PLACE THE UNIT ON A SOFT NON ABRASIVE CLOTH WHEN CARRYING OUT MAINTENANCE PROCEDURES TAKE CARE NOT TO PLACE ANY STRAIN ON THE CONNECTING RIBBON CABLE WHEN REMOVING THE TOP HOUSING ENSURE THAT THE CABLE ASSEMBLY IS NOT CRIMPED OR TWISTED AND THAT THE TOP HOUSING IS NOTPLAC ED ON THE CABLE ASSEM BLY CARE MUST BE TAKEN WHEN REMOVING AND REPLACING CONNECTORS NEVER USE FORCE NEVER STRAIN THE C ABLE ASSEM BLIES THE PROC EDURAL STEPS GIVEN FOR EACH MODULE MUST BE FOLLOWED IN THE ORDER GIVEN SC HILLER AT 1 AT 1smartpnnt ECG Unit SERVIC E HANDBOOK Issue b June 2001 Physic al Overview The AT 1 AT 1smartprint unit is enclosed in a two part medical standard moulded plastic case The top housing contains the keyboard with the base assembly containing all the electronics of the unit the thermal printer the paper tray the battery and mains tra nsformer The electronics of the unit are contained on two printed circuit boards control and powersupply board MK 11 10 and the ECG interface board MK 11 2 The ECG interface board also supportsthe patient connector The PCBsare secured on spacersmoulded in the base section The battery is secured in position with double sided tape and the mains transformer is secured on spacers The thermal printeris mounted on a pnnter papertray assem
22. RINTER IF PRESENT DO NOT UNDER ANY CIRCUMSTANCES IMMERSE THE APPARATUS INTO A CLEANING LIQUID OR STERILIZE WITH HOT WATER STEAM OR AIR The casing of the AT 1 AT1smartprint can be cleaned with a soft damp cloth on the surface only Where necessary a domestic non caustic cleanercan be used forgrease and fingermarks Patient Cable CAUTION ALIGN THE LEADS IN SUCH A WAY AS TO PREVENT ANYONE STUMBLING OVER THEM OR ANY DAMAG E CAUSED BY THE WHEELS OF INSTRUM ENT TRO LLEYS THE SAM E CAUTION APPLIES TO THE STORAGE OF THE LEADS The patient cable should not be exposed to excessive mechanical stress Whenever disconnecting the leads hold the plugsand notthe cables The cable can be wiped with soapy water Stenlization if required should be done with gas only and not with steam To disinfect wipe the cable with hospital standard disinfectant Cleaning the Thermal Printhead of the internal printer If the printeris used a lot a residue of printers ink from the grid on the paper can build up on the printhead This can cause the print quality to deteriorate We recommend therefore that every month the printhead is cleaned with alcohol as follows Remove the paper tray The thermal printhead is found under the paper tray release catch With a tissue dampened in alcohol gently rub the printhead to remove the ink residue If the printhead is badly soiled the colour of the paper grid ink i e red or green will show on the tissue
23. SC HILLER AT 1 AT 1lsmartonnt ECG Unit SERVIC E HANDBOOK Issue b June 2001 AF1 Atismartpnnt ECG unit Service Handbook SC HILLER AG Altgasse 68 CH 6341 Baar Switzerla nd Phone 41 41 766 42 42 Fax 41 41 761 08 80 Home page http www schiller ch June 2001 Article Number 2 540022 SCHILLER AT 1 AT1 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 H D F Article No 2 510179 SC HILLER AT 1 AT 1 smartprint User Guide EDF Article No 2 510171e 93 A2 EEC Medical Devices CE 0123 Se SN 0123 Notified Body TUV PS Windows isa trademark of Microsoft Corporation SC HILLER AT 1 AT 1smartpnnt ECG Unit SERVIC E HANDBOOK Issue b J une 2001 Where to Obtain Service EU authorized representative USA WELCH ALLYN SCHILLER Inc 7420 Carroll Road San Diego CA US 92121 Canada 2334 USA Tel 1 858 635 6023 Fax 1 858 635 6611 Home Page www welchallyn com Asia Pacific SC HILLER Asia Pacific 10 Jalan SS 3 33 Taman Universiti 47300 Petaling Jaya Selangor Malaysia Tel 603 7877 5336 Fax 603 7877 5744 Austria SC HILLER HmbH Kampmullerweg 24 A 4044 Linz Austria Tel 43 732 709 90 Fax 43 732 757 000 France SC HILLER Medical S A BP 50 19 Avenue de la Gare F 67162 Wissembourg Cedex France Tel 33 3 88 63 36 00
24. THE PURPOSE OF THIS BOOK IS TO PROVIDE ALL THE INFORMATION NEC ESSARY TO ENABLE THE SERVIC E ENGINEER TO EFFIC IENTLY LO C ATE AND REPLACE A FAULTY M O DULE THIS BOOK ASSUM ES NO DETAILED KNOWLEDGE OF THE ECG UNIT BUT DO ES REQUIRE THAT THE SERVIC E ENGINEER IS FAMILIAR WITH STANDARD WO RKSHO P PRAC TIC ES The book is divided into the following chapters Chapter 1 Operating Elements The purpose ofthis chapteristo provide an easy reference forall main operatorfunctions and to give a basic introduction to the AT 1 A 1smartprint This cha ptergives details of the operator controls with the operation and function of each key briefly explained The information in this chapterprovides a background to the operating functionsonly Complete operating information is provided in the SCHILLER AT 1 AT 1 smartprint User Guide Chapter 2 Functional Overview This chapterprovidesa functional overview ofthe AT 1 AT 1 smartprint The description 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 presented in a logical sequence offaultfinding algorithmsand procedures Illustrations are provided to supportthe 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 unitbriefly described The physical descripti
25. al mode only o M Te VO Indicator lamp for selected lead group standard Cabrera Uu a aVL aVR Il aVF III in manual mode only e Vi V2 V3 Indicator lamp for selected lead group in manual mode only o V4 V5 V6 Indicator lamp for selected lead group in manual mode only 14 SC HILLER AT 1 AT 1smartpnnt ECG Unit SERVIC E HANDBOOK Issue b June 2001 AT 1 AT 1sma rtprint Short Form Operating Instructions Art No 2 540022 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 extemally fred with external printer NOT connected or switched off To record and print on intemal printer For AUTO Format 1 press EA 7 For Auto Fomat 2 press Ar and then Ea Press COPY for additional copies copy 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 7 0 3 3 s D I D B IJ noce electrode dc offsets Best results are obtained when the electrode voltage readings right column are between 50mV and 50mV Filter On Off 0 Press Fur to switch the Myogram filter On Off System Configuration 7 0 1 1 DEI RD GB noe setting s I5 SCHILLER Modes of Operation 16 Automatic Mode a without external printer
26. ation 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 Zo Art No 2 540022 SCHILLER settings cont Defining Lead Sequence amp Printout The required settings can be selected as follows er RE Print amp Auto centering Entry Key Sequence Key Sequence Definition nition Confirm ET Standard Lead Sequence EY Cabrera Lead Sequence BEANS ra Sequential Print m PUE ey F Auto centering ON Em Auto centering OFF ER Z fold paper Confim the selection by pressing the STOP key The selectable printout forms are Simultaneous All ECG leads are printed in the same time segment in automatic mode only Sequential Each group isa contiguoustime segmentof approximately 2 5 or5 seconds in automatic mode only Auto Centering ON All ECG tracesare centred dynamically for optimal use of paperwidth Auto Centering OFF ECG tracesare setto a fixed baseline position and may possibly overlap The Standard and Cabrera lead groupsavailable forthe AT 1 AT 1smartprintare Lead Groups Standard Cabrera Fu fave ve vs 1 prep v vs 26 SC HILLER AT 1 AT 1smartpnnt ECG Unit SERVIC E HANDBOOK Issue b June 2001 Settings Cont Acoustic QRS Indication The acoustic QRSbeep can be switched on oroffatany time by pressing the QRS BEEP ke y a Time Date AT 1 smartprint only The required settings can be se
27. attery brown n d d Q D D 2 MALE T 5 1 i n TURN M earth yellow green Le MOTTE n athari Wy SELL 3 Replace the printer papertray assembly and connectall cables 4 Replace the ECG interface board see page 59 5 Replace the top housing and reassemble the unitasdescribed on page 57 65 Art No 2 540022 SCHILLER Ba tte ry Pack The battery pack is held in position with double sided tape Prerequisites e The Wamingsand Cautions atthe beginning of the Chaptermustbe observed The top housing mustbe removed and allextemal cable assemblies disconnected Tools and Equipment Double sided tape Parts The partnumbers of all replaceable items are given in Chapter 6 Battery Pack Removal WARNING THE MAINS SUPPLY MUST BE DISC ONNEC TED DURING THIS PROC EDURE To remove the Battery Pack proceed as follows 1 Ensure that the unit is switched off and that the mains is disconnected 2 Disconnect the two bayonet connectors and remove the Battery Pack by gently pulling away from the base Battery Pack Replacement 1 Stick a piece of double sided tape to the bottom of the battery pack 2 Position the battery pack with the connectors towards the inside of the unitas shown above 3 Press firmly on the battery so the double sided tape sticksto the base assembly 4 Connectthe bayonetconnectorsforthe red and blacklead asshown above 5 Replace the top
28. bly which is secured in the base assembly Because of the plastic construction of the case threaded metal inserts are used throughout for all screw fixings Test Equipment Tools and Accessories The following list details the tools testequipmentand accessories required to carry out all functional tests calibration proceduresand adjustmentsthatcan be carried outon the AT 1 AT 1smartprint The test equipment given here is general If specific recommendation for test equipment is required please contact the SCHILLER service department Selection of posi drive and flat bladed screwdrivers e Cleaning agentsuch as Inchlorethylene Double sided tape e ECG Patient Simulator e SCHILLER 10 lead patientcable Number2 400070 2 400071 for USA e Spring compressor if available ora pairof pliers 35 Art No 2 540022 SCHILLER Opening the Case 56 Prerequisites e The unitmustbe placed on an antistatic matand antistatic precautions observed when any maintenance iscamed outon the AT 1 AT 1smartprint The room temperature should be between 18 and 28 C e THE WARNINGS AND CAUTIONS AT THE BEGINNING OF THE CHAPTER M UST BE OBSERVED Tools Posi drive screwdriver Test Equipment The following testequipmentis required to cany outthe functional test after unitassembly SCHILLER Patient Cable PatientSimulatore g phantom 320 Top Housing Removal The Top Housing is mounted on the Base Assembly and is secured to th
29. ccurate and of good quality Switch the unit off ana leave connected to the mains supply for 10 hours or more to charge the battery Disconnect the mains and switch the unit on Ensure that the Battery LED is lit Run the unit on battery power for approximately one hour Ensure thatthe battery LED flashes when the battery has limited capacity not before 4 hours SC HILLER AT 1 AT 1smartpnnt ECG Unit SERVIC E HANDBOOK Issue b J une 2001 Internal Printer Check To check the printer and to ensure that every pixel is operational a built in printer test is provided To carry out the printer check press ALT MAN START A test printout is given Fourtestpattemsare available toggle between the testpattems with the lead arrow keys up ordown A Wy Carefully examine the printoutand ensure thatallthe linesare even and unintemupted Any faulty printhead pixels will be seen asa horizontal white line Examine the printout for evenness of print If a faulty pixel is detected the printer must be replaced If the printout is uneven for example darkeratthe top than atthe bottom itindicatesthatthe printeralignmentis not correct If the printout is too faint or too dark check the TPH temperature in the service printout given in Chapter 5 Also check the paper old paper paperthathas been exposed to lightfora long period orpoorquality papercan alladversely effect the print qua lity NOTE THE SHELF LIFE OF THE PRINTER PAPER IS
30. ced noise 43 Art No 2 540022 SCHILLER 44 SC HILLER AT 1 AT 1lsmartonnt ECG Unit SERVIC E HANDBOOK Issue b June 2001 Chapter 3 Fault Diagnosis 45 Art No 2 540022 SCHILLER Fault Diagnosis Chart 46 MODULE REMOVAL AND REPLACEMENT INSTRUCTIONS ARE DETAILED IN CHAPTER 4 FOR INTERNAL PRINTER PROBLEMS SEE PAGE 49 SC HILLER AT 1 AT 1smartpnnt ECG Unit SERVIC E HANDBOOK Issue b June 2001 Introduction The AT 1 AT 1smartprint is designed foreasy use and service the service philosophy of the AT 1 AT 1smartprint is module replacement and not board repair The purpose of this chapteristo provide fault finding proceduresthat will quic kly and efficiently identify a faultto a specific module Fault finding proceduresare designed so thattestequipment is keptto a minimum An initial fault diagnosis chart is provided detailing general fault indications Use the procedures on the following pages to indicate a faulty area or module In most cases the fault diagnosis chart should indicate the most likely faulty area When more than one module is stated the first module given is the one most likely to contain the fault Other modulesgiven should be checked in the ordergiven When a module hasbeen replaced specific test parameters and setting up of the module may be applicable The removal and replacementinstructions forall replaceable modules along with any setup orcheck procedures
31. ch parameterissetby meansofa code Thiscode comprises a combination of keys starting with the ALT key followed by two orthree numbers The setting is confirmed with the STOP 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 Ifa 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 wantto set the language on yourECG unitto English the key sequence given in the table see page 23 Is ALT 0 2 2 SIOP ei SI Cm gj Key 0 Key 2 Key 2 Program sequence Start programming Confirm setting Switch to numerical keyboard On the following pagesthe programmable parametersand the programming sequences are descnbed in detail Settings Cont SC HILLER AT 1 AT 1sma rtprint ECG Unit SERVIC E HANDBOOK Issue b June 2001 The defined formats and settings for your unit can be checked as follows ALT 0 1 any number A printout of the defined settings will be produced and gives the following information depending on the installed software Unit designation Serial number Leads ECG Format
32. coordination of the AT 1 AT 1smartprintis performed by a Motorola 68332 Microcontroller which performs all timing and control functions Memory An EPROM with 128 kByte memory containsthe unit software Astatic RAM memory stores the ECG data and comprises two 256 kByte RAM chips Aserial EEPROM U48 stores the unit base settings Thermal Printhead Controller The thermal printhead is controlled by a printhead controller and a CPU timer circuit The printhead controller sera lises the data forthe printhead and the timercirc uit controls how long cumentis applied to the head and thus the intensity of the printout Printer Timing Strobe generation is controlled by the CPU when one complete pixel line of data is ready to be written Pulse length of STRB1 and STRB2 each of which controls half of the pixel array depends on the TPH temperature and therefore on the pulse width of the TPHT signal Note IPHtemperature reading is described on page 34 SC HILLER AT 1 AT 1smartpnnt ECG Unit SERVIC E HANDBOOK Issue b June 2001 Main Board MK 11 10 cont Paper Mark The pulsed papermark signal from the pnnterisfed to a comparator A detected paper mark supresses any logic 0 pulses of PMARK atthe output of comparator U38 Power On Reset The Power on reset circuit controls the master reset of the CPU This circuit has two functions as follows To provide a delay on initial switch on to ensure that the power suppl
33. e 2001 Safety Notices NO TES DO NOT USE SOLVENT CLEANERS THIS UNIT COMPLIES WITH EMC REGULATIONS FOR MEDICAL PRODUCTS WHICH AFFO RDS PRO TEC TION AGAINST EMISSIONS AND ELEC TRIC AL INTERFERENC E HOWEVER SPEC IAL C ARE MUST BE EXERCISED WHEN THE UNIT IS USED WITH HIGH FREQUENCY EQUIPMENT BEFORE USING THE UNIT ENSURE THAT AN INTRODUC TON REGARDING THE UNIT FUNC TONS AND THE SAFETY PREC AUTIO NS 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 SUSPEC TED OF BEING DAMAGED USE ONLY ACCESSORIES AND OTHER PARTS RECOMMENDED OR SUPPLIED BY SC HILLER AG USE OF OTHER THAN RECOMMENDED OR SUPPLIED PARTS MAY RESULT IN INJ URY INAC C URATE INFORMATION AND OR DAMAGE TO THE UNIT IT MUST BE ENSURED THAT NEITHER THE PATIENT NOR THE ELEC TRODES INCLUDING THE NEUIRAL ELEC TRODE COME INTO CONTACT WITH OTHER PERSONS OR CONDUCTING O BJ ECTS EVEN IF THESE ARE EARTHED THERE IS NO DANG ER 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 ELEC TRODES IN CASE OF DOUBT THE PATIENT SHOULD BE DISCONNECTED FROM THE REC ORDER IF SEVERAL UNITS ARE COUPLED THERE IS A DANG ER OF SUMMATION
34. e Base Assembly With six screws accessto the screwsisgained from the underside ofthe unit To remove the Top Housing proceed asfollows WARNING ENSURE THAT THE MAINS CABLE IS REMOVED 1 Tum the unitupside down and rest on a soft antistatic cloth 2 Unscrew and remove the six countersunk retaining screws and washers situated in the extreme comersand edges ofthe unit 3 Grasping the top housing and base assembly to ensure thatthey cannot part carefully retum the unitto the standing position 4 Release the catch and open the paper tray lid with the printer roller 5 Gently liftthe Top Housing and tum it slightly counter clockwise so it can be lifted away from the paper tray lid 6 Disconnectthe cable assembly between the control and powersupply board MK 11 10 and the keyboard 7 Gently liftthe Top Housing away from the Base Assembly and place iton a soft Cloth SC HILLER AT 1 AT 1lsmartonnt ECG Unit SERVIC E HANDBOOK Issue b J une 2001 Top Housing Replacement To replace the Top Housing proceed as follows 1 Check thatall boards and components are firmly secured Check for loose screws Ensure that no screws or foreign bodies are loose in the bottom of the case 2 Inspectall the intemal cable assemblies and ensure that they are in good condition and thatno visible damage can be seen Ensure thatno cable assemblies are strained crushed orcaught 3 Ensure thatall connectors are firmly home 4
35. ement and the PWM Pulse Width Modulation circuits 12 NOTE The ECG board reference voltage is given on the service printoutand can be checked without disassembling the unit Full details of the service printout are given on page 34 IMPORTANT THE 2 V REFERENCE VOLTAG ES AND THE PWM RAMP MUST BO TH BE AD USTED AT THE SAME TIME Tools Equipment and Material Dig ital multimeter Small flatbladed screwdnver Procedure DISC ONNECTTHE MAINS SUPPLY Disassemble the unitas detailed in Chapter 4 Remove the screws securing the ECG interface board MK 11 2 remove the connecting cable to the control and power supply board and gently lift up the ECG interface board Use a pairofflat bladed pliers to tweak the metal tabs of the ECG shield which are protruding through the board and tum them in such a way thatthe ECG shield can be removed Remove the ECG shield Carefully place the ECG interface board by the side of the unit with the componentside up Reconnectitto the control and powersupply board Reconnectthe keyboard to the control and powersupply board and place the top housing on its side in front of the base assembly as shown below SC HILLER AT 1 AT 1smartpnntECG Unit SERVIC E HANDBOOK Issue b J une 2001 ECG Amplifier Reference Voltage Switch the uniton and measure the voltage difference between the 2 V reference and the 2 V reference on pins 1 and 7 of operational amplifier ULOO Adjust the trimmer
36. equence Language Selection AT 1 smartprint Language Confirm German English French Swedish American Italian Portugese Dutch 4 5 6 T Spanish 8 9 0 Russian Press STOP key German English French Swedish American Italan Spanish Portugese Gelle a RS D Dutch Press STOP key Confim the selection by pressing Notes The difference between English and American is the mains filter setting English 50Hz American 60Hz and the physical units Art No 2 540022 23 SCHILLER settings cont Filters There are three different filters which can be set individually as follows Baseline filter e Mains filter Myogram filter Baseline Filter The digital Baseline filter suppresses excessive baseline drifts The setting options are as follows Baseline Filter Entry Key Sequence Filter Setting Confirm E 0 05 Hz default Press STOP mus 0 15 Hz key 0 30 Hz 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 asthe possibility exists thatthey could affectthe original ECG signal especially the ST segments Mains Filter The Mains filter is an adaptive digital interference filter de
37. eruntil the paperisto be used Store in a cool dark and dry area Do notstore near chemicals e g sterilisation liquids In particular do notstore in a plastic cover u e wN Certain glues can react with the paper do notattach the printout onto a mounting sheet with glue SC HILLER AT 1 AT 1lsmartonnt ECG Unit SERVIC E HANDBOOK Issue b June 2001 Chapter 2 Functional Overview 39 Art No 2 540022 Id MN ouuo juoneq NM 1exo d Joy pue NMU BUSTS Jori duue ynduy DOUDIOJOI Io I2AUOO TACT S XISINASSV WALNINd UOTIeST IGQeys JSUISAUOI IOLISAUO9 ler omod Jd OV P JV 9A CLT MIN SUI I SWAP NOLLV IOSI LNALLVd AOVAWALNI 993 SOO 9POI oopg NE WSS SCT PLT K OT neg NOW At 01 MOTIE SUIUUNI 1030JA NON uonooj3o1d UOISISAUOI ogvy oAJopu SO y osuos IFLJJON uonoojoud preoqA2x WO NO z eueouaan ATS Nd WO AAO SOI IFLJJOA SUIUOJIMS SUISU9S 938JI0A ATOI Jongo JOJe NGOI oge3 oA IFLA CIS sna ap Jasreyo AEJ 0HU09 pee 410 NO JSIAS FEJA aM Ug mam UI MIN AVOA NIVIN tl dL Y CI dL AII g ACI ned eq CAI SUT JA 40 SCHILLER SC HILLER AT 1 AT 1smartpnnt ECG Unit SERVIC E HANDBOOK Issue b June 2001 Introduction This chapter provides a functional overview of the AT 1 A 1smartprint electronics The aim of this overview is to enable the service engineer to identify processing paths in orderto
38. es are printed 4 x 3 25 mms 2 rhythm leads 25mm s The average complexes are printed in 4 groups of three leads at a chart speed of 25mm s 4 x 3 50 mm s 2 rhythm leads 25mm S The average complexes are Press STOP printed in 4 groups of three leads at a key chart speed of 50mm s 6 x 2 50 mms 2 rhythm leads 25mnys The average complexes are printed in 6 groups of two leads at a chart speed of 50mm s 12 x 1 lead 25mnys 2 rhythm leads 25mnys 30 SC HILLER AT 1 AT 1smartpnnt ECG Unit SERVIC E HANDBOOK Issue b June 2001 Automatic Mode ECG Settings External Printer cont Measurements and Markings M and C versions only To define the measurements and markings proceed asfollows Measurements M and C Options Only External printer Detailed table of measurement results omitted however the values of electrical 5 axes intervals and heart rate are not suppressed Detailed table of measurement results 1s rinted ALT 3 p Press STOP key Reference markings are omitted Reference markings beginning and end of P wave and QRS and end of T wave are added to the ECG average cycles Interpretation C version only To print or suppress interpretation statements on the printout proceed as follows Interpretation Interpretation Option Only External printer ALT 4 Press STOP M key ES Interpretation is printed Confirm the selection by pressing the STOP key Full details of the interpretatio
39. ete Portoguese 3 910965 Printer Papertray assembly complete 3 910966 Paper tray lid 3 910967 Ground shield 4 416028 Tra nsformer shield 4 416027 ECG isolation shield 4 435198 Mains socket complete 4 270009 Mainsfuse holder 4 210049 Mainsfuse 200 mA T 4 210010 Mains transformer 4 320066 12 Vlead acid battery 4 350024 Printer motor complete 4 330019 Thermal pnnthead 4 140115 Thermal pnnthead cable 4 520378 Printer roller 4 410181 Potential equalisation stud 4 260377 oe SCHILLER SC HILLER AT 1 AT 1lsmartonnt ECG Unit SERVIC E HANDBOOK Issue b June 2001 Chapter 7 Technical Data 79 Art No 2 540022 SCHILLER Technical Data 80 Technical data subjectto change without notice Dimensions Weight Mains Supply Battery Battery Capacity Power Consumption Leads Paper Speed Sensitivity Chart Paper Printing Process Recording Tracks Automatic Lead Programs Data Record ECG Storage Frequency Range of Digital Recorder ECG Amplifier 290 x210 x69 mm 2 9 kg 100 to 115 220 to 240 VAC 50 60 Hz Built in 12 Vlead acid battery rechargeable 2 hoursnormal use Recording 28 VA max Standard Cabrera 5 25 50 mm s direct 5 10 20 mm mV either automatically adjusted or manually selected Thermoreactive Zfolded 90 mm wide perforation 90 mm High resolution thermal printhead 8 dots permm 3 channels positioned at optimal width on 80 mm automatic baseli
40. he building common ground with the yellow green ground cable Partno 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 13 Art No 2 540022 SCHILLER The Keyboa rd Switch unit on A Cancel or enable QRS beeper Automatic ECG sensitivity adjustment E in order to avoid overlapping traces in automatic mode only Stop recording Key for 1 mV mark on output Switch myogram filter muscle tm during manual recording Use this key e also for baseline recentering tremor filter on or off AT Key for initiation of setups and selection Lead group selector backward of second format for printout Switch unit off Copy stored ECG printer ECG sensitivity selector 5 10 or 20 mm mV auto and manual recording Start automatic recording Chart speed selector 5 25 or 50 mm s manual recording only Start manual recording Lead group selector forward ll HE T Mains indicator lit when mains connected o Fi Battery indicator lit when running on battery power mains not connected blinking when battery capacity is getting low o LEAD OFF Warning lamp for loose electrode connection or poor electrode contact o PAPER Warning lamp for end of paper or paper jam o FILTER Myogram filter lit when filter is ON o av i at Indicator lamp for selected lead group standard in manu
41. help identify possible faulty modules A functional block diagram supportsthe te xt 41 Art No 2 540022 SCHILLER Main Board MK 11 10 42 Power Supply The mains supply is full wave rectified to produce an unregulated dc supply of approximately 35 V U This voltage isused by a switched voltage generatorto produce T UD 13 5V UD charges the battery when mains is connected When mains is not connected UD is the battery voltage An ON OFF control logic switches UD to three voltage regulators The unit is switched on directly from the keyboard and then held on from the CPU Detection of overvoltage on either the 5 2 V or 24 V supplies directly switches the unit off Similarly when an undervoltage is detected on US indicating overcurrent the unit is directly switched off The mains LED is lit directly when mainsis connected The same circuitalso monitors the switched dc supply US and activates signal BATT when the unit is switched on and mains is not connected i e the unitis running on battery power A Battery low signal BLOW is set to logic 0 when battery voltage US fallsto 11 3 V A circuit compensates for voltage drop when the printer stepper motor is active and the BLOW signal is active only at 10 3 V Note The battery voltage is also monitored directly by the CPU which switches the unit off when the voltage falls below approximately 9 4 V CPU and processing circuits Overall control and
42. housing and reassemble the unitasdescribed on page 57 SC HILLER AT 1 AT 1smartpnnt ECG Unit SERVIC E HANDBOOK Issue b June 2001 Battery Pack Settings After Battery Replacement AT 1 smartprint only Program all static settings which will have been lostwhen the battery wasdisconnected including date and time Set Date ALT 0 5 2 D D M M Y Y An acoustic signal confirms the changed setting Set Time ALT 0 5 1 H H M M S S An acoustic signal confirmsthe changed setting Note If the battery has been disconnected for more than half an hour the clock oscillator must be restarted before setting the time To do this the following key sequence mustbe pressed ALT 0 5 9 This will start the oscillator and the time can be set Note The time and date only appearon the AUTO printoutfrom the external printer 65 Art No 2 540022 SCHILLER Keyboa rd The keyboard comesasa complete assembly with the top housing The partnumberfor the keyboard complete with top housing is given in Chapter 6 66 Art No 2 540022 SC HILLER AT 1 AT 1lsmartonnt ECG Unit SERVIC E HANDBOOK Issue b June 2001 Chapter 5 Adjustments 67 SCHILLER Introduction 68 This chapterprovidesthe proceduresnecessary to checkand adjustall service settings Every procedure isself contained and details the tools required to cany outadjustments and the test equipment necessary Any adjustments special checks or functi
43. ice is SCHILLER AG Sales Department Order Processing Altgasse 68 CH 6341 Baar Switzerland Phone Number 41 41 766 42 42 Fax Number 41 41 761 08 80 When ordering state that the order is foran AT 1 AT 1smartprint unit and provide the following Part Description PartNumber e YourAddress Service Department If you need help from ourservice engineers please contactthe following number Fax Number 41 41 761 03 34 If you contactus by fax be sure to provide the following information Serial Numberfor your AT 1 A 1smartprint Software version for system printer e Accessonesused modeland cable number 76 SC HILLER AT 1 AT 1smartpnnt ECG Unit SERVIC E HANDBOOK Issue b June 2001 Sp re Parts Art No 2 540022 DESCRIPTION PART NUMBER AT 1 Control and powersupply board MK11 1 3 2420 AT 1 smartprint Control and powersupply board MK 11 10 3 2426 ECG amplifierboard MK 11 2 3 2421 Papermarksensorboard MK11 51 3 2423 AT 1 software programmed EPROM 4 999940 ALL Bottom assembly complete 3 910960 ALL smartprint Bottom assembly complete 3 910940 Top housing with keyboard complete German 3 910961 Top housing with keyboard complete English 3 910962 Top housing with keyboard complete French 3 910963 Top housing with keyboard complete Spanish 3 910964 Top housing with keyboard compl
44. ing to IEC 60601 1 with intemal powersupply Temperature Operating 10 to 40 C Temperature Storage 10 to 50 C Relative humidity 25 to 95 non condensing Atmospheric pressure 700 to 1060 hPa Rubberkeys 12 channel high resolution print out standard Centronicsconnecting cable The AT 1 AT 1smartprintis available in three versions Standard Version Version M Version C Art No 2 540022 Unit with ECG recording and printout capabilities Unit with additional ECG measurementprogram Unit with additional ECG Interpretation program including measurements l SCHILLER 82 SC HILLER AT 1 AT 1smartpnnt ECG Unit SERVIC E HANDBOOK Issue b J une 2001 Index A Article Numbers 77 Automatic Mode 17 18 B Battery Pack 64 65 Board Removal MK11 10 62 Board Replacement MK11 10 63 C Calib 34 Check Procedures 48 Configurations 81 Customer Services Sales Department 76 Service Department 76 D Default Settings 22 E ECG Isolated PowerSupplies 43 ECG Signal 43 Electrode DC Offset 34 F Fault Diagnosis Chart 46 Filter 24 Functional Overview 41 G General Check Procedures 48 K Keyboard 14 66 M ManualMode 19 Memory 42 MotorSpeed 43 N Noise Damping 43 Art No 2 540022 5 SCHILLER O Opening the Case 56 Ordenng Information 76 P PaperHandling 37 PaperMark 43 Paper Tray 60 Patient Cable Resis
45. lected as follows Setting the Time and Date Key Sequence Enter Data Confirmation Time ALT 0 5 1 HHMMSS beep Date ALT 0 5 2 DDMMYY beep Seasonal Time Variation Time change Key Sequence Wintertime to Summetme ip 0 9 A Summertime to Wintertime 1H AE 5 Note If the battery has been disconnected for more than half an hour the clock oscillator must be restarted before setting the time To do this the following key sequence mustbe pressed ALT 0 5 9 This will start the oscillatorand the time can be set Note The time and date only appear on the AUTO printout from the external printer P Art No 2 540022 SCHILLER Automatic Mode ECG settings Internal Printer Two separate Auto formats can be defined for the intemal printer in the AT 1 AF1smartprint When defining auto format 1 the key sequence ALT 1 precedesthe setting When defining auto format2 the key sequence ALT 2 precedesthe setting The automatic mode fomatsare detailed on the following pages The ECG formatisset as follows ECG Format Internal Printer Entry Key Sequence Printout Confirm 5 No leads printed 6 Leads are printed in short form 3 sheets 7 Lead inted in long f 6 sheet ALT lor2 1 PORC et 8 Chart Speed 25mm s 9 Chart Speed 50mm s Average Cycles The Average cycles are defined as follows
46. mustbe disconnected Tools e Posi drive screwdriver Part Numbers The part number forthe ECG Interface Board is given in Chapter 6 Board Removal CAUTION THE ECG INTERFACE CONTAINS SIATIC SENSITIVE CMOS COMPONENTS OBSERVE ANTISTATIC PREC AUTIO NS To remove the ECG interface proceed as follows 1 Unscrew the six screws secunng the board to the spacers 2 Gently raise the board to gain access to the cable assembly to the Control Board MK11 10 and remove the connector Remove the board Board Replacement 1 Connectthe cable assembly to the Control Board MK 11 10 Place the ECG amplifier board component side down over the six spacers so that the patient cable connector is positioned in the cutout on the side panel 2 Secure the board to the six spacer supports with the retaining screws 3 Replace the Top Housing asexplained on page 57 Checks and Tests after Replacement To prove the integrity of the replaced board cany out the following functional check procedure Switch on the unitand connecta SCHILLER patientcable to the ECG connector Connect a Suitable patient simulator to the ECG connectorand press MAN START Ensure that all the leads are printed Art No 2 540022 SCHILLER Printer Tra y Assembly and Thermal Printer Prerequisites The Wamingsand Cautionsatthe beginning of the Chaptermustbe observed The top housing mustbe removed asdetailed previously All extemal cable assemblies mustbe
47. n option are given in the SCHILLER ECG Measurement and Interpretation booklet art No 2 510 179 31 Art No 2 540022 SCHILLER Automatic Mode ECG settings Interpretation Settings C version only The interpretation settings enable the userto determine whetherornotcertain comments will be added to the interpretation statements on the ECG printout Furthermore the patient s age can be defined lt 30 or gt 30 and if low or high sensitivity should be applied Low sensitivity will suppress certain non specific and lessimportantECG diagnosis this may be advisable when carrying out ECGsfor screening rr Settings E J Key E S Seng Normal Abnormal is not printed Normal Abnormal is printed Patient RS eet ee assumed to be lt 30 Patient age assumed to be gt 30 Low sensitivity High sensitivity 32 SC HILLER AT 1 AT 1smartpnnt ECG Unit SERVIC E HANDBOOK Issue b June 2001 Automatic Mode ECG Settings cont Selecting Rhythm Leads The rhythm leadsare printed outasdefined Two separate rhythm leadscan be selected The following formats can be set Rhythm Leads interpretation option only Sequence FE Define rhythm lead one ALT E Define rhythm lead two The 2 rhythm leads are defined as follows Le Leads Precordial Leads Leads Confim the selection by pressing the STOP key 33 Art No 2 540022 SCHILLER Service Printout The service p
48. ne adjustment 3 channel representation of 12 simultaneously acquired standard leads Listing of ECG recording data Version C ECG measurement results intervals amplitudes electrical axes Sokolow Index average complexes with optional measurement reference markings and interpretation Circularinput memory for 10 s 12 lead ECG 0 to 150 Hz IEC 0 to 150 Hz AHA Simulta neous synchronous registration of all 9 active electrode signals 2 12 standard leads Sampling frequenc y 1000 Hz Digital resolution 5 UV Dynamic range 10 mVAC Max electrode potential 300 mVDC Time constant gt 3 25 0 05 to 150 Hz 3 dB gt 10 MOhms Frequency response Inputimpedance Technical Data cont SC HILLER AT 1 AT 1smartprint ECG Unit SERVIC E HANDBOOK Issue b June 2001 Myogram Filter muscle tremor filter 25 Hz or 35 Hz programmable not active on Line Frequency Filter Patient Input Patient Leakage Current Safety Standard Safety Class Environmental Conditions Control Panel AT 1 smartprint only Exte mal Printer Available Configurations averaged waveform The stored ECGscan be printed with or without filter Distortion free suppression of superimposed 50 or60 Hz sinusoidal interferences Fully floating and isolated defibrillation protected lt 5 uA CFaccording to IEC 60601 1 and IEC 60601 2 25 l accord
49. nntout provides information about the patientcable and electrodes and gives the values of certain reference voltages and important intemal offset values These values are for information only To obtain the service printout press ALT 0 3 3 ECG Reference Voltage This provides measurements and setting facilities for the e Uref e Uref e Udif e Uoff e Calib Electrode dc offset TPH TEMP EPROM 34 reference voltage used for accurate measurement of ECG signals This gives the value of the reference voltage used in the multiplexer circuit on the ECG Amplifier The value of the reference voltage is 2000 mV 20 mV Thisisa negative reference voltage used on the ECG Amplifier board The value ofthis voltage should be 2000 mV 20 mV This is the sum of the two reference values above Uref and Uref This value mustbe 4000 mV 20 mV Thisisthe value ofthe offset voltage on the multiplexer circuit This value should be between 150mV and 150mV This value is the Udif value divided by 4 The nominal value is 1000 x5 mV This gives the voltage drop in the patient cable and can indicate any faults in the patient cable or patient electrode The value given isthe dc voltage between the leftleg electrode and all other electrodes The measurements obtained will indicate any cable shortcircuits oropen circuits The measured voltage value will depend on where the electrodes are connected The voltage readingsthat can be
50. on is supported by illustrations showing the intemal 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 mustbe carried outafterreplacing 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 providesthe partnumbers and reordering information forall replaceable modules Also included in this chapter are details of any special test equipment or special tools required foradjustment or fault finding procedures Art No 2 540022 SCHILLER 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 amp Board Layouts The circuit diagramsand componentla youts are provided forall boards These details are provided forinformation only General Symbols Mains connected Battery operation Flashes when battery capacity limited Potential Equalisation common ground Attention General warning sign see accompanying text gt 4H Je
51. onal tests thatare required on the module oron associated modulesor software are also detailed In text illustrations support the text where required and provide location details of connectors test points and adjustment potentiometers Specific wamingsand cautions are given in the text where applicable The part numbers forall replaceable modules are given in Chapter 6 The AT 1 AT 1lsmartonnthas the following adjustments e Battery Charge Voltage VR4 on the control and powersupply board MK 11 10 ECG Amplifierreference voltage and ramp slope VR2 and VR3 on the ECG interface board MK 11 2 We recommend that the reference voltages are checked every year SC HILLER AT 1 AT 1smartpnnt ECG Unit SERVIC E HANDBOOK Issue b J une 2001 Warnings Cautions and Conditions WARNING MAINS POWER IS PO TENTIALLY LETHAL DISC O NNEC T THE MAINS BEFORE DISASSEM BUNG THE UNIT ADDITIO NALLY ENSURE THAT THE MAINS IS DISCONNECTED BEFORE CARRYING OUT ANY MAINTENANCE CALIBRATION C HEC KS OR ADJ USM ENTS CAUTIONS THE AT 1 AF1 SMARTPRINT CONTAINS SIATIC SENSITIVE CMOS COMPONENTS OBSERVE ANTISIATIC PRECAUTIONS WHEN CARRYING OUT ANY MAINTENANC E PRO C EDURES ALWAYS PLACE THE UNIT ON AN EARTHED ANTISTATC MAT PERSONNEL MUST BE EARTHED WHEN HANDLING ANY BOARDS OR COMPONENTS ALWAYS USE AN ANTISTATIC BAG WHEN TRANSPORTING BOARDS OR COMPONENTS CARE MUST BE TAKEN WHEN REMOVING AND REPLACING CONNECTORS NEVER USE FORCE NEVER STRAIN THE
52. ormation see paragraph Automatic Mode ECG Settings on page 30 16 SC HILLER AT 1 AT 1smartpnnt ECG Unit SERVIC E HANDBOOK Issue b June 2001 Manual Mode Manual mode providesa real time ECG printout of 3 selected leads with full control of parameter selection This is only possible on the intemal 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 e On the loweredge the chart speed and filter settings if on e Atthe top the heart rate ascumentaverage of 4 beats trace sensitivity The following can be freely chosen during orbefore the recording Lead Group by meansofthe LEAD FORWARD Wy and LEAD BACKWARD key A The following lead groups are selectable Chart Speed Sensitivity Myogram Filter Recentering Art No 2 540022 M MI a VR a VL a VF Cabrera aVL I aVR Il a VE III V1 V2 V3 V4 V5 V6 Select speed 5 25 or50 mm s by meansof the SPEED keys m ome Come Select5 10 or20 mm mV by means of the SENSITIVITY keys mei eil mem Switch the filter ON or OFF with the FILTER key 25 Hzor35 Hz is displayed on the bottom line of the printout when the filter is switched on 0 9 To re centre the ECG traces press the 1mV key im 19 SCHILLER settings 20 Ea
53. otbe placed nearX ray ordiathemmy units large transformers ormotors The unit mustbe placed on a flatsurface and mustnotbe operated in areas where there isany dangerof explosion Power Supply The mainsconnection ison the rearofthe unit The mainsindicatorlamp 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 isindicated by the respective indicatorlamp When battery capacity islimited the battery symbol flashes on and off To recharge the battery connect the device to the mains supply by means of the supplied powercable Atotally discharged battery needslessthan 15 hoursto be fully recharged 60 in less than 3 hours 90 in less than 7 hours A fully charged battery givesapproximately 2 hoursof nommal use The unitcan remain connected to the 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 meansofthe red OFF key The unitis automatically switched off after 5 minutes 30 seconds if battery capacity is limited if no key is pressed and the patientcable isnotconnected Potential Equa lisation v Ifthe A T1 AT 1 smartprintisused in conjunction with otherpatientconnected equipment we recommend thatthe potential equalisation stud on the rearofthe unitisconnected to t
54. required are given in Chapters4 and 5 If the initial fault diagnosis chart does not indicate the area where the fault exists re check all the settings and parameters that have been entered 47 Art No 2 540022 SCHILLER General Functional Check Procedure 48 The procedure detailed here isa generalconfidence check of the unitafteran intemal module or board hasbeen replaced It is nota full functional test which can only be camed out with dedicated equipment in the factory but is intended to provide a general confidence check in all the major AT 1 AT lsmartonnt functional areas The instruc tions given here are guides to the basic functions If more operating information is required general settings comprehensive menu guides etc please referto Chapter 1 in this publication or the relevant User Manual To cany out the general AF1 AF1lsmartorint functional check procedure proceed as follows 1 Connectmains powerto the unitand ensure thatthe green mains LED lights Switch the unit on by pressing the key on the keyboard Ensure that the LED lig hts flash for about a second Cany out the printer check detailed on the next page Connectan ECG simulator to the ECG connectoron the side panel and switch on Press the Ea key and ensure that three leads are printed and are of good quality Press the Ea key and wait approximately 10 seconds for the printout to commence Ensure that the printoutis a
55. signed to suppress AC interference without attenuating or distorting the ECC Set the mains filter in accordance with the frequency of your local mains supply as follows Mains Filter Entry Key Seauence Filter Setting Mains Filter 50 Hz ALT m Mains Filter 60 Hz See SE CN m Mains Filter Off 24 SC HILLER AT 1 AT 1smartpnnt ECG Unit SERVIC E HANDBOOK Issue b June 2001 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 asthe FILTER key is pressed on orprogrammed asdefaultwhen the unitis switched on When the Myogram filter is on the value i e 35 Hz is displayed on the bottom line of the printout Myogram Filter Myogram Filter 25 Hz EX Myogram Filter 35 Hz Myogram Filter active when the unit is first Press STOP switched on marked on printout with key Myogram Filter off when the unit 1s first switched on marked on printout with Confirm the selection by pressing the STOP key 0 The myogram filter is switched on and off manually with the FILTER KEY ur Note An ECG recorded in auto mode is stored unfiltered Itis therefore possible to print the stored ECG either with or without passing the myogram filter Filter ON isindicated in the bottom information line of the printout When the FILTER key is pressed again the filter is switched off and the 35 Hz indic
56. sioning screws Thermal Printer Replacement To replace the thermal printer proceed as follows 1 Position the printer in the pnnter paper tray assembly so that the printer mounting plate lips slot into the dedicated cutouts in the assembly secure with the two retaining screws Ensure that the cable assemblies from the printer to the interface PCBare notcaughtand are notstrained 2 Using a spring compressor or a pairof pliers insert the two tensioning springs so thatthe springs are positioned overthe outertwo moulded spring supports and in the indent hole in the printer mounting plate 3 Replace the printer papertray assembly asdescnbed on page 60 4 Replace the top housing asdescribed on page 57 Checks Tests and Adjustments after Printer Replacement Checkthe print quality as described in Chapter3 Printer Motor Removal and Replacement 1 Remove the top housing and the printer papertray assembly as outlined above 2 Tum the printer papertray assembly on the side to get access to the printer motor 3 Unscrew and remove the two fixing screws and carefully lift the motor out of the assembly 4 Replace the motor carefully put itin place and fasten the two retaining screws 5 Replace the printer papertray assembly and the top housing as explained above Art No 2 540022 SCHILLER Control and Power Sup ply Board MK 11 10 The Control and Power Supply Board MK 11 10 is secured to the base assembl
57. ta neously processed to provide instant EC G recordings Three automatic recording modes two forthe intemal printerand one forthe extemal printer canbe individually preset to enable one button ECG recording of preferred print formats Individual lampsare provided to give power papererror filter lead group and lead off indications In addition any detected disturbance i e loose electrode orend of paper givesan audible alarm and the corresponding indicatorla mp fla shes The AT 1 AT 1 smartprint includesthe following features e low weightand compactdimensions e Printout from integrated quality thermal printer OR from extemal A4 inkjet printer e Built in rechargeable battery for mains independent use 2 hrsnormmal use on one battery charge Simple one key operation for main functions Automatic ormanualrecording modes e Selectable printing formats extemal and intemal printer Interpretation program option including measurements forchildren and adults e Choice of 10 languages AT 1 and 9 languages AF1 smartprint for printing SC HILLER AT 1 AT 1smartpnnt ECG Unit SERVIC E HANDBOOK Issue b June 2001 Location amp 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 ireparable damage The unitshould n
58. tance 34 Physical Overview 55 Power On Reset 43 Powersupply 13 Printer check 49 50 Printer Removal amp Replacement 59 Printer Timing 42 Printhead 36 Printhead Alignmentand Printhead Tension 49 Program Memory 42 Proprietary Test Equipment tools 70 R Removaland replacement 61 S Safety Notices 5 Serial EEPROM 42 Service and Sales 3 Settings 20 Spare Parts 77 Stepper Motor Controller 43 T Technical Data 80 Test Equipment 70 Thermal Printhead Controller 42 Tools 55 Top Housing Removal 56 Top Housing Replacement 57 U Udif 34 Uoff 34 Uref 34 Uref 34 84
59. xternal Printer Problems Possible Printer Problem External Inkjet printer No printout Poor quality printout No printout Corrective Action Check that the USB and the Centronics interface on the external printer are not simultaneously engaged Make sure that the printer and the AT 1 smartprint are properly grounded via the potential equalisation stud No format has been selected in Settings Select a proper format Art No 2 540022 SC HILLER AT 1 AT 1lsmartonnt ECG Unit SERVIC E HANDBOOK Issue b June 2001 Chapter 4 Module Removal and Replacement 51 SCHILLER Paper tray assembly and motor Thermal printer 32 Remove top assembly ECG Mains trans interface former and MK 11 2 connector Battery pack Control and power supply board MK 11 10 Remove top assembly Keyboard SC HILLER AT 1 AT 1smartpnnt ECG Unit SERVIC E HANDBOOK Issue b June 2001 Introduction This chapterprovidesan overview ofthe proceduresto remove and replace the modules thatare spared atservice level The instructions given in this chapterare autonomous with each module containing the following The prerequisites that must be fulfilled before removing the module e Toolsand equipmentthatare required to remove and replace the module and to carry outthe functional checks and adjustments Removalprocedures Replacementprocedures e Checksand tests that must be carried out after replacement
60. y and located under the ECG Interface Board MK 11 2 Prerequisites The Wamingsand Cautions atthe beginning of the chapter must be observed The top housing mustbe removed and allextemal cable assemblies disconnected The ECG Interface Board mustbe removed The printer papertray assembly mustbe removed Tools and Equipment Posi drive screwdriver Parts Control and Power Supply board MK 11 10 Partnumberasdetailed in Chapter 6 Board Removal WARNING ENSURE THAT THE MAINS CABLE IS DISCONNECTED BEFORE COMMENCING To remove the Control and Power Supply Board MK 11 10 proceed as follows 1 Disconnect the following connectors 62 live and neutral bayonet connectors to the mains connector battery connectors black neutral red live TATEA JIIII D s e 8 Li H Se KKK CC 7 A es D gt H Me Set pe TTL ee Ld Pes LIES loges lol mms Unscrew the 12 fixing screws four on the mains transformer and lift out the board SC HILLER AT 1 AT 1smartpnnt ECG Unit SERVIC E HANDBOOK Issue b J une 2001 Control and Power Sup ply board MK 11 10 Board Replacement To replace the Control and Power Supply Board MK 11 10 proceed as follows 1 Position the board and secure atthe 12 fixing points fouron the mains transformer 2 Connect the following live and neutral bayonet connectors to the mains connector live and neutral bayonetconnectors to the b
61. y is fully stabilized and give the 200ms resettime required by the 68332 processor e To disable the unitif the 5V rail drops below 4 75V Stepper Motor Controller The printer stepper motor controller sets the speed of the printer motor with a clock frequency dictated by the master C PU The purpose of the stepper motor controller circuit is to ensure that the motor speed requested by the microprocessoris achieved and maintained ECG Isolated Power Supplies DC DC converter circuits produce all the isolated powervoltagesrequired by the ECG Amplifier c irc uit The 2 0Vi and the 2Vi isolated reference voltagesare generated from the 5Vi supply Note When taking measurements always ensure that the isolated ground is used for reference ECG Signal The incoming ECG signals RA LA and C1 to C6 are low pass filtered approximately 10kHz and applied to non inverting operational amplifiers giving a gain of 11 The signals are further low pass filtered approximately 400Hz and amplified by 23 before being applied to the multiplexer The multiplexersampling rate is LOOOHz Noise Damping The rightleg electrode to the patient is the signal ground reference signal To assist in cancelling some patientnoise and thus reducing incoming signal distortion the incoming signal from the patientleftleg electrode is phase shifted 180 This phase shifted signal is then used by the signal ground reference to cancel or reduce patient indu

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