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Schiller CARDIOVIT AT-1, Service Handbook

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25

SCHILLER AT-1 / AT-1smartprint ECG Unit

SERVICE HANDBOOK  Issue b  June 2001

Art.No. 2.540022

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 FILTER 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.

Myogram Filter

Entry Key Sequence

Setting

Confirm

ALT

8

2

Myogram Filter 25 Hz

Press STOP

key

3

Myogram Filter 35 Hz

1

Myogram Filter active when the unit is first

switched on (marked on printout with +)

8

Myogram Filter off when the unit is first

switched on (marked on printout with -)

Confirm the selection by pressing the STOP key

The myogram filter is switched on and off manually with the FILTER 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 the FILTER
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.

Summary of Contents for CARDIOVIT AT-1

Page 1: ...CE HANDBOOK Issue b June 2001 Art No 2 540022 AT 1 AT 1smartprint ECG unit Service Handbook SCHILLER AG Altgasse 68 CH 6341 Baar Switzerland Phone 41 41 766 42 42 Fax 41 41 761 08 80 Home page http www schiller ch June 2001 Article Number 2 540022 ...

Page 2: ...22b 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 ...

Page 3: ...sel Strasse 14 D 85521 Ottobrunn Germany Tel 4989 629 981 0 Fax 4989 609 509 0 India SCHILLER Healthcare India Pvt Ltd D C Silk Mills Compound A Wing 1st floor 5 Chunawala Estate Kondivitta Lane Andheri Kurla Road Andheri E Mumbai 400 059 India Tel 9122 826 3520 Fax 9122 826 3525 Italy ESAOTE Spa SCHILLER Via di Caciolle 15 I 50127 Firenze Italy Tel 39055 4229 201 Fax 39055 4229 208 Switzerland SC...

Page 4: ...ized 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 PARTICULAR PURPOSE WITH RESPECT TO THE PRODUCT OR PARTS THEREOF Physicians responsibility THIS UNIT IS PROVIDED FOR T...

Page 5: ...LY ACCESSORIES AND OTHER PARTS RECOMMENDED OR SUPPLIED BY SCHILLER AG USE OF OTHER THAN RECOMMENDED OR SUPPLIED PARTS MAY RESULT IN INJURY INACCURATE INFORMATION AND OR DAMAGE TO THE UNIT IT MUST BE ENSURED THAT NEITHER THE PATIENT NOR THE ELECTRODES INCLUDING THE NEUTRAL ELECTRODE COME INTO CONTACT WITH OTHER PERSONS OR CONDUCTING OBJECTS EVEN IF THESE ARE EARTHED THERE IS NO DANGER WHEN USING TH...

Page 6: ...LIQUID DO NOT USE HIGH TEMPERATURE STERILISATION PROCESSES SUCH AS AUTOCLAVING DO NOT USE E BEAM OR GAMMA RADIATION STERILISATION THIS UNIT IS CF CLASSIFIED ACCORDING TO IEC EN 60601 1 THIS MEANS THAT THE PATIENT CONNECTION IS FULLY ISOLATED AND DEFIBRILLATION PROTECTED SCHILLER CAN ONLY GUARANTEE PROTECTION AGAINST DEFIBRILLATION VOLTAGE HOWEVER WHEN THE ORIGINAL SCHILLER PATIENT CABLE IS USED DO...

Page 7: ... 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 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 m...

Page 8: ...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 ...

Page 9: ...ernal printer NOT connected or switched off 15 Modes of Operation 16 Automatic Mode 16 Manual Mode 16 Automatic Mode 17 a without external printer connected or printer switched off 17 b with external printer 18 Settings 20 Default Settings 22 Language 23 Filters 24 Baseline Filter 24 Mains Filter 24 Myogram Filter 25 Defining Lead Sequence Printout 26 Acoustic QRS Indication 27 Time Date 27 Automa...

Page 10: ...ter 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 Cauti...

Page 11: ...11 SCHILLER AT 1 AT 1smartprint ECG Unit SERVICE HANDBOOK Issue b June 2001 Art No 2 540022 Chapter 1 Operating Elements ...

Page 12: ...bance 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 opera...

Page 13: ...ry 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...

Page 14: ...14 The Keyboard ...

Page 15: ...record and print on internal printer For AUTO Format 1 press For Auto Format 2 press and then Press COPY for additional copies Manual ECG Recording internal printer only Prepare skin hook up patient Switch unit on press ON Press MAN START Change lead group with Press STOP to stop the printout Electrode hook up check Press for print out of electrode dc offsets Best results are obtained when the ele...

Page 16: ...erage 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...

Page 17: ...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 Cy...

Page 18: ...e 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 ...

Page 19: ...edge the chart speed and filter settings if on At the top the heart rate as current average of 4 beats trace sensitivity The following can be freely chosen during or before the recording Lead Group by means of the LEAD FORWARD and LEAD BACKWARD key The following lead groups are selectable I II III aVR aVL aVF Cabrera aVL I aVR II aVF III V1 V2 V3 V4 V5 V6 Chart Speed Select speed 5 25 or 50 mm s b...

Page 20: ... is not pressed within 4 seconds the unit reverts to standard mode The ALT key must again be pressed to activate the programming mode The setting is remembered and the keyboard released for other functions when the STOP key is pressed Once a setting has been confirmed it is stored in the memory even when the unit is switched off Example If you want to set the language on your ECG unit to English t...

Page 21: ... 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 Enabled or Suppressed Interpretation Enabled or Suppressed Selected Rhythm leads Leads selected for R1 and R2 Automatic Centering Enabled or Suppressed Paper type Z folded Printout of signals Sequential or Simultaneous Base...

Page 22: ...OO M ECG M ECG NONE PATIENT DATA FORM ENABLED MEASUREMENTS SUPRESSED MEASUREMENTS SUPRESSED MARKS ENABLED MARKS ENABLED INTERPRETATION DISABLED RHYTHM LEADS V1 II 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 SETTINGS 50HZ 60HZ 50HZ 60HZ 50HZ 60HZ MYOGRAM FILTER...

Page 23: ... key 2 English 3 French 4 Swedish 5 American 6 Italian 7 Spanish 8 Portugese 9 Dutch 0 Russian Language Selection AT 1 smartprint Entry Key Sequence Language Confirm ALT 0 2 1 German Press STOP key 2 English 3 French 4 Swedish 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 50...

Page 24: ... 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 EC...

Page 25: ... 3 Myogram Filter 35 Hz 1 Myogram Filter active when the unit is first switched on marked on printout with 8 Myogram Filter off when the unit is first switched on marked on printout with Confirm the selection by pressing the STOP key The myogram filter is switched on and off manually with the FILTER KEY Note An ECG recorded in auto mode is stored unfiltered It is therefore possible to print the st...

Page 26: ...lectable printout forms are Simultaneous All ECG leads 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 overl...

Page 27: ... 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 Summertime 1Hr ALT 0 5 4 Summertime to Wintertime 1Hr ALT 0 5 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 must be pressed ALT 0 5 ...

Page 28: ...s 8 Chart Speed 25mm s 9 Chart Speed 50mm 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 Internal printer Entry Key Sequence Printout Confirm ALT 1 or 2 2 5 No average lead cycles are printed Press STOP key 6 4 x 3 25 mm s The average complexes are printed in 4 groups of three lead...

Page 29: ...d Press STOP key 6 Detailed table of measurement results is printed 7 Referenece markings are omitted 8 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 Internal printer Entry Key Sequen...

Page 30: ...in long form 6 6 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 Entry Key Sequence Printout Confirm ALT 9 2 5 No average lead cycles are printed Press STOP ke...

Page 31: ...ed Press STOP key 6 Detailed table of measurement results is printed 7 Reference markings are omitted 8 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 Entry Key Sequen...

Page 32: ...w or high sensitivity should be applied Low sensitivity will suppress certain non specific and less important ECG diagnosis this may be advisable when carrying out ECGs for screening Interpretation Settings Entry Key Sequence Setting Confirm ALT 6 1 Normal Abnormal is not printed Press STOP key 2 Normal Abnormal is printed 3 Unconfirmed report is not printed 4 Unconfirmed report is printed 5 Patie...

Page 33: ...formats can be set Rhythm Leads interpretation option only Entry Key Sequence Setup Format ALT 3 Define rhythm lead one 4 Define rhythm lead two The 2 rhythm leads are defined as follows Extremity Leads Entry Key Sequence Lead Confirm ALT 3 or 4 8 1 I Press STOP key 2 II 3 III 4 aVR 5 aVL 6 aVF Precordial Leads Entry Key Sequence Lead Confirm ALT 3 or 4 9 1 V1 Press STOP key 2 V2 3 V3 4 V4 5 V5 6 ...

Page 34: ...er circuit This value should be between 150mV and 150mV Calib This value is the Udif value divided by 4 The nominal value is 1000 5 mV Electrode dc offset This gives the voltage drop in the patient cable and can indicate any faults in the patient cable or patient electrode The value given is the dc voltage between the left leg electrode and all other electrodes The measurements obtained will indic...

Page 35: ...oftware 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 is indicated by a series of beeps CAUTION MORE THAN 10 UNSUCCESSFUL ATTEMPTS TO ENTER THE CODE BLOCKS THE UNIT ...

Page 36: ...BLING OVER THEM OR ANY DAMAGE CAUSED BY THE WHEELS OF INSTRUMENT TROLLEYS THE SAME 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 plugs and not the cables The cable can be wiped with soapy water Sterilization if required should be done with gas only and not with steam To disinfect wipe the...

Page 37: ...If no paper is left the printing process is interrupted and the paper warning lamp starts to blink To replace the paper proceed as follows Press the latch for the paper tray to release the lid with the rubber roller Remove any remaining paper from the paper tray Place a new paper pack into the paper tray with the printed grid side facing upwards Close the lid and press firmly until release catches...

Page 38: ...le 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 cover until the paper is to be used 2 Store in a cool dark and dry area 3 Do not store near chemicals e g sterilisation liquids 4 In particular do not store in a plastic cover 5 Certain glues can react with the paper do not att...

Page 39: ...39 SCHILLER AT 1 AT 1smartprint ECG Unit SERVICE HANDBOOK Issue b June 2001 Art No 2 540022 Chapter 2 Functional Overview ...

Page 40: ...0 kHz 5Vi 2Vi 5Vi 5Vi 10Vi 5 2Vi PATIENT ISOLATION 4kVrms Voltage regulator Switching voltage reg 5V ref 5 2V 24V Overvoltage protection Undervoltage protection Voltage sense conversion MON Motor running BLOW 10 3V MON US ON OFF control Battery charger voltage regulator Rectification Voltage sensing circuit US US 5 2V 24V 12 V Battery Mains LED U MAIN BOARD MK 11 10 TP 12 TP 13 P3 part P3 part P3 ...

Page 41: ... 540022 Introduction This chapter provides a functional overview of the AT 1 AT 1smartprint electronics The aim of this overview is to enable the service engineer to identify processing paths in order to help identify possible faulty modules A functional block diagram supports the text ...

Page 42: ...he 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 coordination of the AT 1 AT 1smartprint is performed by a Motorola 68332 Microcontroller which performs all timing and control funct...

Page 43: ...ted by the microprocessor is achieved and maintained ECG Isolated Power Supplies DC DC converter circuits produce all the isolated power voltages required by the ECG Amplifier circuit The 2 0Vi and the 2Vi isolated reference voltages are 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...

Page 44: ...44 ...

Page 45: ...45 SCHILLER AT 1 AT 1smartprint ECG Unit SERVICE HANDBOOK Issue b June 2001 Art No 2 540022 Chapter 3 Fault Diagnosis ...

Page 46: ...46 Fault Diagnosis Chart ...

Page 47: ... 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 modules given should be checked in the order given When a module has been replaced specific test parameters an...

Page 48: ...follows 1 Connect mains power to the unit and ensure that the green mains LED lights 2 Switch the unit on by pressing the key on the keyboard Ensure that the LED lights flash for about a second 3 Carry out the printer check detailed on the next page 4 Connect an ECG simulator to the ECG connector on the side panel and switch on 5 Press the key and ensure that three leads are printed and are of goo...

Page 49: ...ER THAT HAS NOT BEEN STORED IN A COOL DAMP FREE ENVIRONMENT OR PAPER THAT HAS BEEN EXPOSED TO EXCESSIVE HEAT CAN ADVERSELY EFFECT 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 cannot be adjusted Similarly printh...

Page 50: ...rintout Check that the USB and the Centronics interface on the external printer are not simultaneously engaged Poor quality printout Make sure that the printer and the AT 1 smartprint are properly grounded via the potential equalisation stud No printout No format has been selected in Settings Select a proper format ...

Page 51: ...51 SCHILLER AT 1 AT 1smartprint ECG Unit SERVICE HANDBOOK Issue b June 2001 Art No 2 540022 Chapter 4 Module Removal and Replacement ...

Page 52: ... tray assembly and motor ECG interface MK 11 2 Mains trans former and connector Battery pack Thermal printer Remove top assembly Keyboard In Base Assembly access to In Top Assembly access to Control and power supply board MK 11 10 ...

Page 53: ...nd tests that must be carried out after replacement 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 warnings and cautions are given where applicable Warnings indicate potential d...

Page 54: ...PLACE THE UNIT ON AN EARTHED ANTISTATIC MAT PERSONNEL MUST BE EARTHED WHEN HANDLING ANY BOARDS OR COMPONENTS ALWAYS USE AN ANTISTATIC BAG WHEN TRANSPORTING BOARDS OR COMPONENTS THE UNIT IS SUSCEPTIBLE TO ABRASION DAMAGE TO PREVENT SCRATCHING 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 W...

Page 55: ...tape and the mains transformer is secured on spacers The thermal printer is mounted on a printer paper tray assembly 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 test equipment and accessories required to carry out all f...

Page 56: ... screws is gained from the underside of the unit To remove the Top Housing proceed as follows WARNING ENSURE THAT THE MAINS CABLE IS REMOVED 1 Turn the unit upside down and rest on a soft antistatic cloth 2 Unscrew and remove the six countersunk retaining screws and washers situated in the extreme corners and edges of the unit 3 Grasping the top housing and base assembly to ensure that they cannot...

Page 57: ...tion 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 MK 11 10 See picture next page Note It may be necessary to tilt the Top Housing for the cable assemblies to reach 5 Turn the Top Housing slightly counter clockwise and lift it over the paper tray lid 6 Carefully position the Top Housing on ...

Page 58: ...58 Physical Overview Keyboard connector Printer motor Patient connector View of the unit with the ECG interface board lifted upp ...

Page 59: ...d as follows 1 Unscrew the six screws securing the board to the spacers 2 Gently raise the board to gain access to the cable assembly to the Control Board MK 11 10 and remove the connector Remove the board Board Replacement 1 Connect the 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 positio...

Page 60: ...ISTATIC PRECAUTIONS 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 paper mark connector B printer motor connector C earth connector to the printhead D 2 Unscrew the four retaining screws and remove the complete paper tray printer assembly Printer Paper Tray Assembly Replacement 1 Positio...

Page 61: ...and are not strained 2 Using a spring compressor or a pair of pliers insert the two tensioning springs so that the springs are positioned over the outer two moulded spring supports and in the indent hole in the printer mounting plate 3 Replace the printer paper tray assembly as described on page 60 4 Replace the top housing as described on page 57 Checks Tests and Adjustments after Printer Replace...

Page 62: ...t be removed The printer paper tray assembly must be removed Tools and Equipment Posi drive screwdriver Parts Control and Power Supply board MK 11 10 Part number as detailed 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 live and neutral b...

Page 63: ...ion the board and secure at the 12 fixing points four on the mains transformer 2 Connect the following live and neutral bayonet connectors to the mains connector live and neutral bayonet connectors to the battery 3 Replace the printer paper tray assembly and connect all cables 4 Replace the ECG interface board see page 59 5 Replace the top housing and reassemble the unit as described on page 57 bl...

Page 64: ... 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 unit as shown abov...

Page 65: ... 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 confirms the 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 must be pressed ALT 0 5 9 This will start the oscillator and the time can be set...

Page 66: ...66 Keyboard The keyboard comes as a complete assembly with the top housing The part number for the keyboard complete with top housing is given in Chapter 6 ...

Page 67: ...67 SCHILLER AT 1 AT 1smartprint ECG Unit SERVICE HANDBOOK Issue b June 2001 Art No 2 540022 Chapter 5 Adjustments ...

Page 68: ...d In text illustrations support the text where required and provide location details of connectors test points and adjustment potentiometers Specific warnings and cautions are given in the text where applicable The part numbers for all replaceable modules are given in Chapter 6 The AT 1 AT 1smartprint has the following adjustments Battery Charge Voltage VR4 on the control and power supply board MK...

Page 69: ...STATIC BAG WHEN TRANSPORTING BOARDS OR COMPONENTS CARE MUST BE TAKEN WHEN REMOVING AND REPLACING CONNECTORS NEVER USE FORCE NEVER STRAIN THE CABLE ASSEMBLIES THE PROCEDURAL STEPS GIVEN FOR EACH MODULE MUST BE FOLLOWED IN THE ORDER GIVEN THE OUTER SURFACES OF THE AT 1 AT 1 SMARTPRINT ARE SUSCEPTIBLE TO ABRASION DAMAGE TO PREVENT SCRATCHING ALWAYS PLACE ON A SOFT NON ABRASIVE CLOTH Conditions The un...

Page 70: ... AT 1smartprint The list of proprietary equipment is not comprehensive Recommendations of suitable proprietary test equipment can be obtained from the SCHILLER Service Department Proprietary Test Equipment Tools Digital Multimeter Standard tool kit with a selection of flat bladed and posi drive screwdrivers pliers and general tools Resistor 2 7 kOhms 250 mW ...

Page 71: ...nominally 13 5 V with a nominal maximum current of approximately 5 mA Adjust and check as follows DISCONNECT THE MAINS SUPPLY Disassemble the unit as detailed in Chapter 4 and remove the ECG interface board MK 11 2 Remove the two battery connectors and connect a 2 7 kOhm 250 mW resistor across the two connectors TP12 and TP13 to simulate a discharged battery Connect the digital multimeter across t...

Page 72: ...ocedure DISCONNECT THE MAINS SUPPLY Disassemble the unit as 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 pair of flat bladed pliers to tweak the metal tabs of the ECG shield which are protruding through the board and turn them in such a way that the...

Page 73: ...tional amplifier U100 Adjust the trimmer VR2 to achieve a voltage difference of 4000 mV 2 mV Obtain a service printout by pressing ALT 0 3 any key Ensure that the 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 unit as detailed in Chapter 4 Recheck the voltage by again obtaining a se...

Page 74: ...74 ...

Page 75: ...75 SCHILLER AT 1 AT 1smartprint ECG Unit SERVICE HANDBOOK Issue b June 2001 Art No 2 540022 Chapter 6 Spare Parts ...

Page 76: ...les 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 for an AT 1 AT 1smartprint unit and provide the following Part Description Part Number Your Address Service Department If you need help from our service engineers please contact the following number Fax Number 41 41 761 03 34 If you cont...

Page 77: ...ete 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 complete Portoguese 3 910965 Printer Paper tray assembly complete 3 910966 Paper tray lid 3 910967 Ground shield 4 416028 Transformer shield 4 416027 ECG isolation shield 4 435198 Mains socket comple...

Page 78: ...78 ...

Page 79: ...79 SCHILLER AT 1 AT 1smartprint ECG Unit SERVICE HANDBOOK Issue b June 2001 Art No 2 540022 Chapter 7 Technical Data ...

Page 80: ...ioned at optimal width on 80 mm automatic baseline adjustment Automatic Lead Programs 3 channel representation of 12 simultaneously acquired standard leads Data Record 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 ECG Storage Circular input memory f...

Page 81: ...o IEC 60601 1 and IEC 60601 2 25 Safety Class I according to IEC 60601 1 with internal power supply Environmental Conditions Temperature Operating 10O to 40O C Temperature Storage 10O to 50O C Relative humidity 25 to 95 non condensing Atmospheric pressure 700 to 1060 hPa Control Panel Rubber keys AT 1 smartprint only External Printer 12 channel high resolution print out standard Centronics connect...

Page 82: ...82 ...

Page 83: ... Replacement MK 11 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 Power Supplies 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 Manual Mode 19 Memory 42 Motor Speed 43 N Noise Damping 43 ...

Page 84: ...Printer Timing 42 Printhead 36 Printhead Alignment and Printhead Tension 49 Program Memory 42 Proprietary Test Equipment tools 70 R Removal and 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...

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