Home

Scholar® III Model 507ELC2 Service Manual

1. Recorder Printer Replacement wi 7 9 Recorder Printer PHemoval nenn 7 9 Recorder Printer Installatton 7 11 Loudspeaker Replacement Loudspeaker Removal eese 7 13 Loudspeaker Installation esses 7 13 ECG Board Replacement ECG Board Remowval ECG Board Installation Blood Pressure Board PHeplacement enne 7 15 Blood Pressure Board PHemoval nennen 7 15 Blood Pressure Board Installation ssseeeeeeeeeeeenreeine eenn nesnresirnnrnrenrrnnsnneee 7 16 Air P mp REPlACOMONt lt dascavesleesccccececsudessecseccescocesetsascenveccestecedebevdsneuecducenstderseasecsesed 7 17 Air Pump Removal eese eene nennen nnn nnne nennt enne 7 17 Air Pump Installation nre eet e ciet ep eoe gez 7 19 Scholar Ill 507ELC2 Series Service Manual Page v Page vi Solenoid Valve Replacement c ccccceeceeeeeeeeeeeeeeseeeeeeeeeeeeseaaaeeeeaaeeeseaeeeeeneeeesseeeess 7 20 General 4s Solenoid Valve Removal sssssssseesssessseesieressrssstrnerinssrenrsrnnetrnnsrnnsernnserrnnsrenne Solenoid Valve Installation essseseeseeeeeieeseesinereesrrrinsrrerinsrrnrininsrrerrnrirerrnrrnnt Pressure Switch Replacement ccccceeceeeeeceeeeeeeeeeeeeeeaeeeeeaeeeeeaeeseeaeeeseeeeeeseeeeeeees Pressure Switch Removal eese nennen enne Pressure Switch Installation Display Interface Board
2. Select COM1 for the port and select Scholar II 507EL for the model Click on OK Click on Connection and select Open in Service Mode Press the Scholar Ill monitor ON OFF key to start the monitor Connect a 700cc dummy cuff and manometer to the NIBP fitting on the unit On the LCD window of the monitor verify that the message NBP SERVICE TOOL and the pressure reading appears Verify that the monitor s serial number appears on the ID box Click OK 10 Click on the Calibrate button to calibrate the NIBP module 11 Check the cuff pressure as indicated on the service screen of the computer The cuff pressure should be zero 1 mmHg If the zero base point is out of range the NIBP module must be calibrated If the zero base point is out of range manually set the NIBP module If the zero base point is within 1 mmHg of zero proceed to the next step 12 To perform the service test for speed click on the Speed button then click on Start When the unit passes the speed test press Done 13 To perform the service test for leakage click on the Leak Page 6 6 button then click on Start When the unit passes the leakage test press Done Scholar amp IIl 507ELC2 Service Manual Criticare Systems Inc Criticare Systems Inc Section 6 Service Testing and Calibration 14 To perform the service test for inflation safety click on the Safety button then click on Start When the unit passes the s
3. The action to be taken following accidental wetting of the equipment is as follows 1 Turn the power off Disconnect the AC power cord from the monitor If monitoring a patient transfer the patient to another monitor as quickly as possible Use aclean dry towel or cloth to remove the liquid from the monitor housing aS soon as possible a service technician should inspected the monitor If the internal mechanism is saturated allow the liquid to drain out for 24 hours before shipping If liquid has entered the monitor it needs to be dried and cleaned internally Full testing is required before you can use the monitor Contact the CSI Service Department as soon as possible Time is critical The longer any liquid remains in the monitor the more damage it can do It is important to service the monitor immediately after any liquid is spilled into it Scholar Ill 507ELC2 Service Manual Page 4 3 Section 5 Preventative Maintenance Incoming Inspection You must inspect monitors coming back from service for shipping damage before you place them into operation just like newly purchased monitors The monitor should be free from dents cracks or other physical damage The quality inspection seal of the monitor should be unbroken indicating that the monitor has been tested according to manufacturer s specifications If further incoming inspection or testing is required the manufacturer recommends t
4. Air Pump Installation 1 Section 7 Disassembly Install the two wire ties through the slots in the bottom of the mounting tray see Air Pump Installation on page 7 17 Slide the terminal end of each pump wire into connector J7 until the terminal latch locks into its slot see Wire Position and Removal from J7 Connector on page 7 18 Be certain that the purple wire is in the first position in the J7 connector and that the yellow wire is in the second position Plug the outlet hose onto the plastic nipple at the center of the pump Set the pump onto the vibration damping pad and tighten the wire ties around the pump Install a new wire tie around the wire harness 6 Pick up the mounting tray and set it onto the support bracket so that the two tabs at the rear of the bracket slide into the slots on the tray Press down on the open end of the tray until the edge of the tray locks behind the tab on the support bracket Install the screw that holds the mounting tray to the support bracket Plug the hose from the display panel onto the elbow that leads to the solenoid valves 10 Perform the Blood Pressure Board installation procedure found in Blood Pressure Board Installation on page 7 16 11 Perform the Main Board installation procedure found in Main Board Installation on page 7 7 12 Slide the top cover down onto the monitor 13 Turn the monitor upside down In
5. A universal switching power supply simplifies operation in international markets The power supply is an external universal switching power supply It provides 1 6 A at 16 VDC The LCD display requires a negative power source typically 24 V which is supplied by an inverter on the main board The power supply satisfies international operational requirements by functioning with either 90 260 VAC at 47 63 Hz line frequency The power supply is fused inside the monitor The battery is a rechargeable lead acid in a compartment accessible for replacement without opening the main chassis It has a maximum capacity of 2 0 Amp hours In order to monitor the status of the line power and condition of the battery pack the internal power supply circuitry drives several status lines available to the main module The power management watchdog circuit provides a low battery level detection mechanism manual reset input and a hardware based check on software operation watchdog timer Scholar IIl 507ELC2 Service Manual Page 3 5 Section 3 Theory of Operation ECG Non Invasive Blood Pressure SpO Board Temperature Impedance Respiration Page 3 6 The ECG module uses a differential amplifier to extract surface ECG activity from a pair of electrodes Input to the amplifier is protected against damage from excessive voltages Passive filtering is used to reduce high power RF interference from electrosurgical devices Filtering for m
6. Disassembly Follow the caution for static sensitive devices in General Caution on page 7 1 Perform the battery removal procedure at Battery Removal on page 7 2 Perform the first 12 steps of the Main Board removal procedure found in Main Board Removal on page 7 4 Label and disconnect connector J2 on the Main Board that connect to the speaker see Main Board and ECG Board Connectors on page 7 5 Remove the speaker from the monitor Take the connector for the new speaker and connect it to J2 on the Main Board see Main Board and ECG Board Connectors on page 7 5 Perform the Main Board installation procedure found in Main Board Installation on page 7 7 3 Slide the top cover down onto the monitor Turn the monitor upside down Install and tighten the four screws that hold the top cover to the monitor Perform the battery installation procedure in Battery Installation on page 7 3 Scholar amp Ill 507ELC2 Service Manual Page 7 13 Section 7 Disassembly ECG Board Replacement ECG Board Removal 1 ECG Board Installation 1 Follow the caution for static sensitive devices in General Caution on page 7 1 Perform the battery removal procedure at Battery Removal on page 7 2 Perform the Main Board removal procedure found in Main Board Removal on page 7 4 Remove the four plastic screws from the solder side of the
7. 5 Press the DOWN ARROW key to select OFF Verify that the tone stops LED TEST 1 Press the ON OFF key and the DOWN ARROW key of the monitor at the same time The Service tools screen appears 2 Press the DISPLAY key 3 Observe the LED s They display an 8 on all 7 segment LED s then 0 and count to 9 Observe that all the proper numbers display TIME AND DATE With the unit powered up 1 Press the SETUP key 2 Go to the second Setup screen and cursor over to the time and date using the SETUP key 3 Set the TIME and DATE using the UP and DOWN ARROW keys Page 5 12 Scholar amp IIl 507ELC2 Service Manual Criticare Systems Inc Section 5 Preventative Maintenance Alarms Verification To verify alarm circuitry perform the following procedure Criticare Systems Inc 1 Press the SET ALARM key to enter the Set Alarm menu Set the ALARM VOLUME to 10 in the Set Alarm menu 2 Enter the Setup menu and turn off temperature monitoring TEMP The display for TEMP should read OFF 3 With no cuff attached press the START STAT STOP key The monitor attempts to inflate and responds with a BP CHECK CUFF message 4 Listen for the low level alarm tone a burst of two pulses at the same pitch The bursts should repeat every 10 seconds 5 Set the ALARM LEVEL to 1 and cause another CHECK CUFF alarm The volume should be decreased but still audible 6 Set the ALARM VOLUME to OFF and cause another CHEC
8. Description CABLE TIE 4 0 LG NYLON P H M S 4 40X 750 PL PH BRKT NIBP MTG CABLE TIE 187X7 5LG FOAM ADH BACK 188X 75X2 SWITCH PRESSURE N C AY MOTOR PUMP NIBP AY PRESSURE SWITCH NIBP AY 2WAY VALVE NIBP AY 3WAY VALVE NIBP AY PNEU VALVE PUMP NIBP AY PNEU VALVE SWITCH NIBP SPACER NY 4 250D 125L CHECK VALVE TUBING SILC BLU 125X 250 AY PNEU VALVE PUMP NIBP CSI Part 41571B002 41700B001 41700B002 Description L CONNECTOR WHT NYLON TUBING POLYU 094IDX 1870 TUBE POLYU 125X 250 85DU NIBP VALVE SWITCH ASSEMBLY AY PNEU VALVE SWITCH NIBP 91754A002 Item 01 02 03 04 Scholar Ill 507ELC2 Service Manual CSI Part 40324B008 41571B002 41700B001 41700B002 Description T CONNECTOR WHT NYLON L CONNECTOR WHT NYLON TUBING POLYU 094IDX 1870 TUBE POLYU 125X 250 85DU Criticare Systems Inc Printer Recorder Assembly Criticare Systems Inc 95721A001 Section 9 Drawings and Schematics PRINTER AY 507ELC2 CSI Part 45152B001 45151B001 91373A001 84005B002 83279B001 42171B002 42158B001 42159B001 42187B001 40995B005 83111B003 83443B001 Description PRINTER HOUSING 507ELC2 MEMBRANE PAPER FEED AY PCB LTP1245 PRNTR I F PRINTER SEIKO W O KNOB PRINTER DOOR 8100 9100 PRINTER MOUNT UPPER SHIELD PRINTER LOWER SHIELD PRINTER STANDOFF 25 4 40 X 437LG P H M S 4 40X 25 SEMS 507ELC2 PRINTER CBL MOUNTING BRKT PRINTER Scholar IIl 507ELC2 Service Manual Page 9 7
9. Section 1 Introduction Controls Screen Resolution Wave Slots Waveform Display Gain Waveform Sweep Speed Keys Languages System Outputs Communication P ort Defibrillation Sync Mechanical Electrical Weight Size Voltage external power supply Voltage monitor Battery Battery Life Recharge time Environmental Operating Temperature Storage Temperature Operating and Storage Humidity Type of Protection Degree of Protection Protection against ingress 5 9 passive LCD or active color TFT 121mm x 91mm 320 x 240 pixels 3 maximum waveforms 2 0 5x 1x 2x 4x user selectable 25 or 50 mm sec selectable 11 membrane activated English RS 232 compatible digital DB 9 BNC connector analog output 1V range 8 5 Ib 3 83 kg 7 6 H x 10 1 W x 10 7 D 19cm H x 26 cm W x 27cm D 90 to 260 VAC 47 to 63 Hz 16V DC Sealed lead acid 1 hour typical 6 hours 59 104 F 15 40 C 23 122 F 5 50 C 15 to 90 non condensing Class Equipment Type CF Defibrillator P roof IPX1 drip proof equipment All specifications are subject to change without notice Page 1 10 Scholar Ill 507ELC2 Service Manual Criticare Systems Inc Symbols Symbol A Section 1 Introduction Definition Refer to Operator s Manual for Information C 0413 European Community Mark ER amp p g iv A S lt ES Electrical Testing Labo
10. The accuracy of the monitor is not affected by arrhythmia or other physiological conditions where the electrocardiogram amplitude and heart rate are within the detectable limits specified for the monitor The monitor has user selectable signal filtering in the 60 Hz and 50 Hz bands that reduce electrical interference from the AC mains power sources User selectable filters are also available Respiration can be measured via the ECG electrodes When determining respiration from the ECG the monitor measures patient respiration by impedance pneumography As the patient s chest changes size and shape during inspiration and expiration the resistance between two chest or abdomen ECG electrodes changes Respiration rate is calculated from this change in resistance The monitor uses ECG data from lead for the impedance measurement Scholar amp IIl 507ELC2 Service Manual Criticare Systems Inc Section 1 Introduction Non Invasive Blood The monitor uses ComfortCuff technology to determine non Pressure NIBP invasive blood pressure by means of oscillometry The oscillometric method detects volume displacements within the artery and senses pressure variations within the blood pressure cuff during inflation The monitor uses cuffs ranging in size from neonate cuffs to thigh cuffs Comfort Cuff ComfortCuff technology measures NIBP while the cuff inflates Technology Consequently a measurement is obtained more quickly and with les
11. and ECG data the NIBP oscillometric data is the final default source for a heart rate measurement NOTE The accurracy of the heart rate depends upon the source The range of the measurable NIBP based heart rate will not extend as far as the range available in other modules used by the smart heart rate feature NOTE The NIBP based heart rate is not a continuous measurement and is only current during an NIBP measurement Scholar IIl 507ELC2 Service Manual Page 1 3 Section 1 Introduction ECG Measurement Method Stability of Accuracy Respiration Page 1 4 The electrocardiogram ECG or EKG records the changing potential generated by electrical activity of the heart To obtain an overall view of the heart s electrical activity three electrodes are attached to lead wires detecting electrical impulses from the patient s heart to the skin The monitor calculates the difference in electrical force between two electrode sites Electrode polarity positive negative or ground depends on the cable receptacle the lead wire is attached to and the lead selected on the monitor screen The ECG design uses the standard conventional bipolar limb leads leads I Il Ill using a 3 lead cable accessory The monitor is equipped with pacemaker detection and user selectable pacer rejection There are no known safety hazard due to the operation of a cardiac pacemaker or other electrical stimulators when used with this patient monitor
12. AY CBL 507EL SPO2 TEMP 42014B001 FITNG QUICK CON HH NIBP 40284B005 NUT 10 32 KEPS PL 42384B001 STANDOFF 4 40 X 625 M F 40086B001 WASHER FLAT PL 125X 219 41458B001 P H M S 4 X 250 HI LO 40995B005 P H M S 4 40X 25 SEMS 42335B001 METRIC PAN HEAD M3X8 81517C001 DISPLAY NEC MODIFIED 42237B001 NUT NYLON JAM 3 8 X 32 42236B001 WASHER MYLAR 3 8 015THK 90793A002 AY CABLE ECG 507E 90901A001 AY CBL BACK LIGHT NEC 42352B001 DRIP GUARD MEMBRANE TAIL 42353B001 SHOULDER WASHER 4 82550B001 FERRITE FLST CABLE 41955B001 FOAM TAPE 1 0 X 2 12 Scholar III 507ELC2 Service Manual Page 9 3 Section 9 Drawings and Schematics Chassis Assembly Page 9 4 927914001 Scholar Ill 507ELC2 Service Manual AY CHASSIS SCHOLAR III CSI Part 40995B001 40182B002 40281B007 40284B002 40496B004 41438B001 41525B001 41527B001 41537B001 41537B002 41592B001 41691B001 45005B004 90755A001 90798A002 90796A001 92250A001 93250A001 93755A005 95002A002 95250A001 90813A001 80122B001 40119B001 40041B007 40041B003 40041B001 Description P H M S 4 40X 312 SEMS MTG HARDWARE SUB D SILVER P H M S 6 32X 375 PL PH NUT 6 32 KEPS PL P H M S 6 32X 500 SEMS CLIP TUBING SPRING LOC FOLDING LEG FEET ADHESIVE HEMISPHERE FOAM DISK 1 38 DIA 25THK FOAM DISK 1 38 DIA 12THK RIVET SNAP BLK K236 BRACKET MTG 507N NIBP CHASSIS FOR 507EL AY CABLE 1100 NIBP RIB AY CABLE DB 9 SCHOLAR II AY CABLE PWR INTFC 507E AY BATT MODEL 602 10 11 AY BATTERY D
13. Adjust R78 on the ECG Resp Temp Board to center the baseline of the ECG 12 This is what it looks like when the ECG is centered e Ab ln ta bs 13 Place GLPT or equivalent varnish on R78 of the ECG Resp Temp Board o ON OA Criticare Systems Inc Scholar III 507ELC2 Service Manual Page 6 9 Section 6 Service Testing and Calibration Check DB 9 Connector for 1 Verify Low Battery With unit on slowly decrease the Variable Power Supply voltage to 11 70 VDC 0 2VDC Verify that the LOW BATTERY message appears on the display There is a long delay before this appears Verify Shut off 1 2 Adjust the Variable Power supply to 11 40VDC Adjust R92 until the voltage at TP 18 equals 1 3 VDC GND is at TP 2 Slowly decrease the Variable Power Supply voltage to 10 9VDC 0 2 VDC to verify that the unit turns off Disconnect power from the unit Assemble unit back to its original configuration Make sure all cables are connected and every thing is secured and fastened Place GLPT or equivalent varnish on R92 Display Check There should be no intermittence or jittering of pixels The maximum amount of pixels missing from any display are as follows Telemetry Compatibility Page 6 10 Set Time and Date 1 Seven dots are the maximum allowed per screen Only 1 dot within a 20mm radius circle Verify 5V is present at PIN 4 f the DB 9 connector Ground is PIN 5 Install the DB 9 cover With the un
14. ECG board see Main Board and ECG Board Connectors on page 7 5 You must label and disconnect the printer flex cable to expose one of the screws Label and disconnect the ECG cable at J2 on the ECG Board Label and disconnect the temperature connector at J1 on the ECG Board Gently shake and pull up the ECG assembly from the Main Board To get access to the board level components remove the top four nylon screws then open the shield Plug the ECG board into the Main Board see Main Board and ECG Board Connectors on page 7 5 2 Install the plastic screw through the ECG board and tighten it 3 Perform the Main Board installation procedure found in Main Page 7 14 Board Installation on page 7 7 Slide the top cover down onto the monitor Turn the monitor upside down Install and tighten the four screws that hold the top cover to the monitor Perform the battery installation procedure in Battery Installation on page 7 3 Scholar amp IIl 507ELC2 Service Manual Criticare Systems Inc Section 7 Disassembly Blood Pressure Board Replacement Blood Pressure Board 1 Follow the caution for static sensitive devices in General Removal Caution on page 7 1 2 Perform the battery removal procedure at Battery Removal on page 7 2 3 Perform the Main Board removal procedure found in Main Board Removal on page 7 4 4 Remove the four plastic screws fr
15. Power Supply Performance Charger Operation 1 Place unit on your bench Remove the cover of the Scholar III Disconnect the power cable speaker wire NIBP cable and hose analog and DB 9 cables from the Main Board Flip the bezel upside down and place the component side up Use the power test cable to connect the board and the base of the 507EL monitor 2 Insert an ammeter in series with the battery using the power test cable Measure the quiescent current Verify that it is less than 0 350mA 3 Turn the unit on and run it until the battery is drained enough to cause the battery charger to go into bulk charge mode Plug in the Cat 924 charger and measure the charge current The current should be 175 350mA 4 Verify that the green POWER LED illuminates when the Cat 924 charger is connected to the unit Remove the Cat 924 charger and the ammeter Verify Centered 1 Connect the Variable Power Supply to the power test cable ECG Baseline Set the power supply to 12 5VDC Power up the unit Aa Go m Insert a CAT 853 or equivalent ECG cable into the connector and connect the leads to the ECG simulator Set the simulator for GOBPM Press the UP arrow key two times to set the scale to X4 Verify the monitor reads 1 2mV ECG on the X4 scale Press the DISPLAY key once to enter the ECG only display Press SETUP to enter SETUP MENU 1 and verify that LEAD II displays 10 Set the input filter to OFF 11
16. Press the DISPLAY key to return to the waveform display 5 Verify the TEMP NO PROBE message appears when no probe is attached 6 Connect a FOGG TP 400 temperature simulator to the TEMP input 7 Set the TP 400 to the temperature settings in the table below Verify that the temperature display is within the table limits Table 1 TP 400 Setting Display Limits 8 Verify LOW TEMP 68 F 67 8 68 2 F message appears 77 F 76 8 77 2 F 86 F 85 8 86 2 F 95 F 94 8 95 2 F 96 8 F 96 6 97 0 F 98 6 F 98 4 98 8 F 9 Verify HIGH TEMP 100 4 F 100 2 100 6 F message appears 102 2 F 102 0 102 4 F 104 F 103 8 104 2 F 113 F 112 8 113 2 F Printer Testing NOTE These steps apply only to the 507ELC2 monitor 1 Press the PRINT key on the keypad Ensure that a strip prints with the monitor model number software revision date and time 2 Press the PAPER FEED key and ensure the paper feeds through the roller 3 Press and hold the SETUP key to configure SETUP MENU 2 4 Press the SETUP key until WAVEFORM is highlighted 5 Press the UP arrow key to select WAVEFORM 8 SEC Press the DISPLAY key to return 6 Connect an ECG simulator set for 60 bpm 7 Print out an ECG waveform Page 5 18 Scholar IIl 507ELC2 Service Manual Criticare Systems Inc Section 5 Preventative Maintenance Scholar Ill Final Test Check Sheet Unit serial number Software Rev Te
17. Rate Criticare Systems Inc Section 1 Introduction All Criticare oximeters DOX compatible have SpO calibration tables which were originally generated by monitoring desaturated human patients or volunteers and matching their displayed SpOs value to the value determined by sampling arterial blood and measuring functional SaO with a clinical laboratory grade multi wavelength optical oximeter i e CO oximeter The final SpOs calibration curve was then generated based upon numerous patients data over the range of 40 to 99 SaO All accepted data were taken from patients with dyshemoglobin i e carboxyhemoglobin methemoglobin concentrations near zero This oximeter is a two wavelength device which is calibrated to measure functional SpOs only when dyshemoglobin concentrations are near zero The accuracy specifications of this device will not be met with high concentrations of dyshemoglobins Significant concentrations of carboxyhemoglobin will result in a higher displayed SpO gt value than is actually present in the patient The heart rate is determined primarily from the ECG waveform data A beat detection algorithm is used to identify QRS beats The monitor has a user selectable smart heart rate function It will automatically use alternate sources to determine heart rate if the primary source becomes unmeasurable The plethysmograph SpO waveform is used if the ECG heart rate is unavailable In the absence of SpO
18. Test the analog ECG waveform signal and the input power where they enter the ECG Resp Temp Board for interference noise You can replace the ECG Resp Temp Board as an assembly with the Main Board as a serviceable component Replacement Main Board ECG Resp Temp Board assemblies pn 95536A002 are pre tested software loaded and calibrated The monitor requires complete safety testing after reassembly NOTE Always check line frequency filter settings and the ECG lead cables as part of any ECG trouble shooting Always use the recommended simulators for performance testing There is one pot under the shielding at locations R78 This is factory set and should not be adjusted The respiration circuit is located on the ECG Resp Temp Board There is no separate calibration or testing for the impedance respiration The temperature module is located on the ECG Resp Temp Board There are no on board settings or service calibrations The temperature module is auto calibrating upon start up Scholar IIl 507ELC2 Service Manual Page 8 3 Section 8 Troubleshooting DOX SpO Module Main Board Page 8 4 The DOX SpO module is included on the Main Board The plethysmograph input signal enters the Main Board through a shielded cable that runs between the board and the SpO connection on the front of the monitor The DON SpO module is composed of digital components that are not effected by noise There is also no signal de
19. U9 U11 U13 U12 Sensor Digital to Sensor Receptacle Analog LED Drivers Converter UB U16 Q4 Oximeter Speaker Digital to Audio Alarms Pulse Analog Amplifier lq Tones Key Converter U37 U38 Q11 I D s LCD U36 Q12 Q13 Q14 Driver Real Time U34 Clock U23 7 Segment 7 Segment LED Display 7 Segment Latch U21 Drivers LED Digits U29 U30 Pushbutton Front Panel Switches Matrix U22 U28 Transmitting Isolators rc de U9 U11 RS232 DB 9 Connector Optical Driver Receiving Isolator RS232 Signal DB 9 Connector Printer Membrane Interface Switches M pire Top Panel oaule Monitor Top Cover Hardware and Circuit Block Diagram Criticare Systems Inc Scholar III 507ELC2 Service Manual Page 3 9 Section 3 Theory of Operation Blood Pressure Board Circuit Diagram Master Microprocessor MPU B P Board Microprocessor B P Board Bus B P Board EPROM U27 B P Board RAM U17 Ato D Converter U14 Air Pump and Valves Multiplexer Demultiplexer U21 Air Pressure Pressure Buffer Sensor Time and PR1 Sensor Page 3 10 Interlocks U2 Blood Pressure Cuff Scholar Ill 507ELC2 Service Manual Criticare Systems Inc Section 3 Theory of Operation Block Diagram o g ga m e 2 Fo DB9 Connection Main Board Print Head Backlight Inverter MEMBRANE SWITCHES LED BOARD Passive LCD Display Acti
20. Verification e 2 S 06 0 0 0 0 0 Electrical Leakage SONS OS 8 8 8 Functional Testing No Fault case opened NIBP Pump and Board SPO2 Board ECG Resp Temp Board Main Board Key Pad Printer and or Board 507ELC2 only Instrument Dropped Software Download Annual Safety Test S S SI amp I amp ISISIS Page 6 2 Scholar III 507ELC2 Service Manual Criticare Systems Inc Section 6 Service Testing and Calibration Equipment Required The following tools are needed Criticare Systems Inc Digital voltmeter Variable DC power supply 10 15 VDC 5A Manometer Power test cable See Power Test Cable on page 6 4 to fabricate Dynatech model 232 leakage tester Cat 924 power supply Battery load simulator cable Dynatech cufflink w neonatal and adult cuff 700 cc factory test block TEE connector K Dynatech 217A or Medsim 300 ECG simulator Fogg TP 400 temperature simulator Cat 913 SpO simulator Frequency counter Oscilloscope 3 Lead ECG cable LL2314 Pigtail test cable Ay Associated Research 3565D Dielectric Withstand Tester or equivalent Hi Pot tester Scholar Ill 507ELC2 monitor including Cat 924 power supply module connected AC Input Test Connector see AC Input Test Connector on page 6 4 to fabricate with 2200 pf Y capacitor CSI pn 20004B019 attached to power ground green wire Hi Pot Test connector for ECG SpO s Temp and DB 9 NIBP Setup Comp
21. and 7 segment LED Board Replacement 7 24 Front Bezel Bemoval n eut een ehe nete bees 7 24 Display Interface Board and 7 segment LED Board Removal s 7 25 Display Interface Board and 7 segment LED Board Installation s 7 26 Keypad Membrane Heplacement we 7 28 General neto ad tte iis ely eet 7 28 Keypad Membrane Pemouva nei 7 28 Keypad Membrane Installation we 7 28 SpO Sensor Receptacle we 7 29 er ici ni MEE 7 29 Section 8 Troubleshooting Troubleshooting Table 1 treten reiner rennen ihrer tendon Troubleshooting and Repair zi ComfortCuff NIBP Module ECG Respiration Temperature Module ssssesssseesssesiressireerinsesrinnsirnsinsttnnterirnsernntent Board Settings and Module Software e Respiration deeg ee Eege e EE E as TOMpPCrature EE DOX SpOs Module 5 dered ee i etr ein edat Main Board s orae mn iE CAT 924 Battery Charger root te tr rep tat deen Section 9 Drawings and Schematics List of Drawings Final Assembly ss Front Bezel ACtiVe eren eee i ei rere ee e rer n n e eain 9 3 Chassis Assembly eterne ettet e ie HE daa n HERE eene e abere raa 9 4 Main ECG Resp Temp Assembly 4419 5 NIBP Assembly 9 6 NIBP Mounting Base 9 6 Printer Recorder Assembly sssssssssssssssseseseeeneen enne enne nnne nnne nnns enne 9 7 Scholar Ill 507ELC2 Series Service Manual Criticare S
22. and power management functions Most system functions are controlled by software running on the microprocessor The microprocessor circuitry handles the Main Board computational functions It also provides integrated I O functions including timers I O pins and two serial interfaces SERIAL INTERFACES The Scholar Ill incorporates two mark high logic level asynchronous serial communications interfaces The power management watchdog circuit provides a power fail and or low battery level detection mechanism manual reset input and a hardware based check on software operation The watchdog resets the Main Board and hence the entire system if the main processor software fails to clear it within a certain time interval This circuit interfaces the main processor with the graphics LCD display on the front panel and the display memory The greeting screen is painted as a form of functional test of the LCD display Messages on the screen indicate power on operations which are available and which have been selected The LED drivers control the multi segment multi digit LEDs used for display of certain vital signs data The ability to blink individual LED elements is provided in software The blinking of all display elements is synchronized LEDs provide data on heart rate BPM systolic blood pressure SYS mmHg diastolic blood pressure DIA mmHg and Mean blood pressure with red LEDs and SpO with green LEDs A matrix keypad interfa
23. on the battery end of the cable NOT the end of the cable that is connected to the monitor To lift the battery out of the battery compartment gently pull on the wires attached to the battery terminals Release the latch on the battery cable connector then disconnect the battery cable at the connector NWARNING N The used battery is a potential environmental hazard and you must dispose of it properly Refer to the safety instructions in Introduction in Section 1 Connect the cable from the new battery to the battery cable connector on the monitor Position the battery cable so that it does not pinch or pull excessively Slide the new battery into position in the battery compartment Replace the battery compartment door and secure it with the three screws The short screw goes in the middle NOTE When you replace the feet be sure to align the small projection on each foot with the matching depression in the case Replace the rubber inserts in each foot 5 Reconnect the power cord to the monitor Charge the battery for Criticare Systems Inc ten hours before you operate the monitor on battery power Scholar Ill 507ELC2 Service Manual Page 7 3 Section 7 Disassembly Main Board Replacement Main Board Removal 1 Follow the caution for static sensitive devices in General Caution on page 7 1 2 Turn the monitor off Unplug the AC adapter charger from the AC wall receptacle Then un
24. rights of others Criticare Systems Inc does not assume any liability arising out of any infringements of patents or other rights of third parties PROPERTY OF CRITICARE SYSTEMS INC ALL RIGHTS RESERVED Scholar Ill DOX Digital Oximetry ComfortCuff NIBP and Multi Site SpO Sensors are trademarks of Criticare Systems Inc Scholar III 507ELC2 Service Manual Criticare Systems Inc Contents Criticare Systems Inc Set LEE ii Contents iii Warranty m Service Ret rr Policy 1 22 ot e RD I LE viii EC Declaration of Contormffv nne ix Section 1 Introduction DOSCIPTON ssi ceistedecreust E cones deed ENEE EEN d Intended WEE Pulse Oximetry Measurement SpO Pire e I A DOX Digital eru EE Method shoe reet St De eo bi oe eb bl b A LO sdb tbe SpO Clinical Testing and Accuracy sese 1 3 Heart Rate ne EGG Meas remeht dnte edi ee Er eina xa NEEN 1 4 Met inti noit EE Hen EE EE 1 4 Stability of Accuracy 2s 1 4 Respiration 0 ee eee eee eeee eee wi 1 4 Non Invasive Blood Pressure NIBP Kare DO Comfort Cuti Technology eterne rnt rne nhi etre rio 1 5 Description of NIBP Measurement sese 1 5 NIBP Clinical Testing and Accuracy res Cuff Inflation and Pressure Protection 6 7 Leakage Current J ees eu er ee I rt treten ire ntt etel 1 12 Voltage Fl ctUatioris oc ico dese 1 12 Software Error Related Haz
25. the Front Bezel 9 Slide the front bezel upward and out of the monitor chassis Page 7 24 Scholar IIl 507ELC2 Service Manual Criticare Systems Inc Section 7 Disassembly Display Interface Board 1 Follow the caution for static sensitive devices in General and 7 segment LED Board Caution on page 7 1 Removal 2 Perform the battery removal procedure at Battery Removal on page 7 2 3 Perform the Main Board removal procedure found in Main Board Removal on page 7 4 4 Label and disconnect the grounding connector lead to the front bezel assembly 5 Label and disconnect at the elbow the hose that runs to the Quick Connect fitting for the blood pressure cuff on the front bezel See Figure 7 14 Disconnecting Blood Pressure Cuff Hose at Elbow NIBP Quick Connect Fitting Hose Figure 7 14 Disconnecting Blood Pressure Cuff Hose at Elbow 6 Label and disconnect the temperature cable the ECG cable the SpO cable and the backlight cable 7 Remove the speaker from the monitor chassis 8 Slide the front bezel upward and out of the monitor chassis 9 Remove the two nuts that hold the EMI shield to the Display Interface Board see Front Bezel Assembly on page 7 27 10 Remove the four screws that secure the EMI shield to the Display Interface Board Remove the EMI shie
26. the following series of tests use the CHARGER 507E EL HI POT SETUP device NOTE For the following series of tests the 2200 pf Y capacitor is connected between the power ground of the Cat 924 and the specific input being tested during any one test see Connecting the Y Capacitor The tester black lead is also connected to the input under test The function of the 2200 pf capacitor is to form part of an AC voltage divider in conjunction with a 1000 pf capacitor which is internal to the Cat 924 in order to protect the output circuitry and the 1000 pf capacitor in the Cat 924 from over load 2 2nFY cap 7 7M 1 2W 3 3M 1 2W Earth Ground Hi Pot Alligator Clip he Shorted Hot Neutral an AC Receptacle to Cat 924 Figure 5 1 Connecting the Y Capacitor 1 Connect the test connector for ECG to the 507EL monitor Criticare Systems Inc Scholar amp Ill 507ELC2 Service Manual Page 5 7 Section 5 Preventative Maintenance Page 5 8 2 Hi Pot CHARGER 507E EL HIPOT SETUP to ECG with 5700VDC 2mA for 1 second Switch to DC a Connect the F PIN ECG HI POT CABLE to the 507ELC2 monitor Now connect CHARGER 507E EL HI POT SETUP to the 924 with the Hi Pot leads connected to the terminals on the setup marked with red and black markers Connect the black wire from CHARGER 507E EL HI POT SETUP to the ECG connector of the 507EL monitor Conduct the test and verify that the
27. uA 12 Set the POLARITY switch to the REVERSE position Press the OPEN NEUTRAL button Accept a reading of less than 50 uA 13 Press the OPEN GROUND button Accept a reading of less than 50 uA 14 Set the LEADS switch to the RA LA INTERLEAD position Set the POLARITY switch to the NORMAL position Accept a reading of less than 20 uA 15 Set the LEADS switch to the RA RL INTERLEAD position Accept a reading of less than 20 uA 16 Set the LEADS switch to the LA RL INTERLEAD position Accept a reading of less than 20 uA 17 Set the LEADS switch to the ISO position Press the ISOLATION TEST button Accept a reading of less than 20 uA Criticare Systems Inc Scholar III 507ELC2 Service Manual Page 5 9 Section 5 Preventative Maintenance 18 Connect the bare wire end of the temperature leakage cable to any of the ECG test terminals on the Dynatech Plug the other end of the leakage cable into the TEMP input of the Scholar III patient monitor Accept a reading of less than 20 uA See Figure 5 2 Temperature Receptacle Test Plug to fabricate Jack Terminal B Wire Terminal A Figure 5 2 Temperature Receptacle Test Plug Page 5 10 Scholar amp IIl 507ELC2 Service Manual Criticare Systems Inc Functional Testing Section 5 Preventative Maintenance Interface Inspection This procedure is primarily for monitors with TFT active displays Manual Controls Ch
28. values as well as wave shape may vary somewhat from one test subject to another There shall be no error messages except possible alarm limit violations present on the display SpO2 TOO LOW HIGH or HEART RATE TOO LOW HIGH are alarm violations Remove the sensor from the finger and install an optical load such as a foam peanut into the sensor After a time delay specified by the SEARCH DELAY setting in the SpO parameter box menu default 2 20 seconds the SpO2 LOST message appears Remove the optical load from the finger clip and slowly open the sensor finger clip while holding the sensor near a fluorescent light source It may be necessary to move the sensor back and forth slightly in order to induce signal saturation The SpO2 HIGH AMBIENT message appears on the display Remove the sensor from the light source and reposition it on the finger The message disappears from the display Scholar amp IIl 507ELC2 Service Manual Criticare Systems Inc Section 5 Preventative Maintenance NIBP Verification For both the 120 80 operation setting and the 80 50 operation setting the monitor is connected to a Dynatech Nevada NIBP Analyzer 1 Use the T connection with the dummy cuffs for these tests Connect them to the 0 300 mmHg port of the NIBP analyzer 2 Connect the monitor to an AC mains power source and turn on the monitor 3 Press the monitors CYCLE TIME key The monitor s cycle time window appears 4 Select th
29. 136758001 91366A001 9136658001 Page 9 1 Section 9 Drawings and Schematics Final Assembly Page 9 2 939714001 Scholar Ill 507ELC2 Service Manual FINAL AY 507ELC2 CSI Part 40496B001 45006B004 95723A001 46036B101 92791A001 40180C007 41891B001 40995B005 46162B001 40065B002 92522A001 95722A001 90815A001 42324B001 42065B002 40296B002 95721A001 40496B004 Description P H M S 6 32X 375 SEMS COVER 507EL LABEL SET 507ELC2 ENG LABEL QLTY SEAL CSI LOGO AY CHASSIS SCHOLAR III EH M S COATED COOL GRAY DB9 COVER PLATE P H M S 4 40X 25 SEMS LABEL CSI MON BAR CODE PAPER THERMAL 2 283 WIDE AY BEZEL SCHOLAR III ACT AY MAIN ECG TEMP 507ELC2 AY CABLE 4 WIRE EMI CHOKE BACK COVER PLATE 507EL F H M S 4 40 X 250 PH PNT TUBING SILC BLU 125X 250 PRINTER AY 507ELC2 P H M S 6 32X 500 SEMS Criticare Systems Inc Front Bezel Active Criticare Systems Inc 92522A001 Section 9 Drawings and Schematics AY BEZEL SCHOLAR III ACT CSI Part Description 45141B001 FRONT BEZEL 507EL 45142B001 MEMBRANE 507EL 46333B001 LBL FRNT CONN 507EL 81518B001 DISPLAY FILTER ACTIVE 42322B001 DISPLAY CHASSIS ACTIVE 83401B001 EMI SHIELD INTERCONNECT 42323B001 MOUNTING BLOCK 507EL 91366A001 AY PCB LED DISPLAY 507EL 91367A001 AY PCB INTERCONNECT 507EL 40995B003 P H M S 4 40X 500 SEMS 83402B001 FLEX CBL NEC DISPLAY ACT 83400B001 RIBBON CBL SAMTEC FFSD 90899A001 AY CBL 507EL GROUND 40284B002 NUT 6 32 KEPS PL 90900A001
30. 17 until it stops Without pulling the flex cable out of J17 gently push forward on the locking mechanism until it snaps closed This can be tricky NOTE Ensure that both sides of the locking mechanism are fully closed Test the flex cable connection by gently tugging on the cable It must not move in the J17 connector If it does move or pulls out then the locking mechanism must be reopened and steps 4 5 and 6 repeated Install the recorder printer module onto the top cover of the monitor by first inserting the front end of the module the end with the PAPER FEED switch into the cut out Allow the back end of the module to rest on the top cover over the cut out Apply gentle downward pressure on both sides of the rear of the recorder printer module as it snaps into place on the top cover The module is loose but is captured by the snap tabs on the module Turn the monitor upside down Install and tighten the recorder printer retaining screw see Figure 7 6 Recorder Printer Module Retaining Screw 10 Plug the AC adapter charger into the wall socket Screw the adapter cord into the monitor 11 Press the ON OFF key to power up the monitor 12 To install a roll of paper open the paper door by pressing in on Criticare Systems Inc the tab on the rear of the paper door while lifting the door up and forward Scholar amp Ill 507ELC2 Service Manual Page 7 11 Section 7 Disassembly 13 Eithe
31. 2 glutaraldehyde solution Place only the sensor finger clip and cable in the solution do not place the sensor electrical connector in the solution To clean the reusable blood pressure cuff wipe it with a damp cloth or sponge If necessary the cuff may be disinfected by wiping with 70 alcohol mild bleach solution or other disinfectant Disposable blood pressure cuffs are for single patient use and are not intended to be disinfected You can sterilize the cloth cuff and neoprene bag with commercially available disinfectants such as ethylene oxide ETO Rinse thoroughly to remove any residual disinfectants Do not allow liquids to enter the neoprene bag The cloth cuff may also be sterilized in an autoclave If the cuffs become grossly soiled with blood or other body fluids launder the cloth cuffs by hand or machine You can launder or sterilize the dacron cloth cuff First remove the neoprene inflation bag Then feed the inflation tube back through the hole and then pull out the cloth flap Scholar amp Ill 507ELC2 Service Manual Page 4 1 Section 4 Cleaning and Disinfecting Flap Figure 4 1 Remove Inflation Bag from Cuff Roll up the inflation bag and slide it out the open slot in the cloth cuff Be sure to observe the following laundering precautions disposable cuffs and neoprene inserts should not be laundered Remove the inflatable bag from the cuff before laundering or sterilizing the cuff Strong bleach so
32. Hi Pot tester indicates pass 3 Hi Pot CHARGER 507E EL HI POT SETUP to BNC with 5700VDC 2mA for 1 second a With the same setup connect the black wire from CHARGER 507E EL HI POT SETUP to the BNC connector found on the back of the unit Conduct the test and verify that the Hi Pot tester indicates pass 4 Hi Pot ECG to DB 9 with 4000VAC 2mA for 1 second Switch to AC a Connect the Red lead of the Hi Pot tester to the F PIN ECG CABLE Connect the black lead of the Hi Pot tester to the DB 9 HI POT ISO GND CABLE connected to the interface connector located on the back of the 507EL monitor Conduct the test and verify that the Hi Pot tester indicates pass Leakage NOTE The cover should stay on for the leakage tests Perform a self test on the Dynatech 232D 1 Turn on the unit Set the MODE switch to SELF test The display should read 1000 20 and the current source active lamp should be on NCAUTION N If these conditions are not met do not continue with the leakage test Set the MODE switch on the Dynatech to L1 L2 The display should read 110 to 130 VAC Set the MODE switch to L1 GND The display should read no more than 5 of the previous line voltage measurement Set the MODE switch to L2 GND This reading should be the same as the first reading 5 VAC Scholar amp IIl 507ELC2 Service Manual Criticare Systems Inc Section 5 Preventative Maintenance 3 Set the MODE switch
33. Install and tighten the four screws that hold the top cover to the monitor Perform the battery installation procedure in Battery Installation on page 7 3 Scholar amp IIl 507ELC2 Service Manual Criticare Systems Inc Air Pump Replacement Air Pump Removal Criticare Systems Inc Section 7 Disassembly 1 Follow the caution for static sensitive devices in General Caution on page 7 1 2 Perform the battery removal procedure at Battery Removal on page 7 2 3 Perform the Main Board removal procedure found in Main Board Removal on page 7 4 4 Perform the Blood Pressure Board removal procedure found in Blood Pressure Board Removal on page 7 15 5 Label and disconnect at the elbow the plastic hose that extends to the Quick Connect fitting on the display panel see Figure 7 9 J7 Connector Ts Outlet Hose Air Wire Mounting Pump Ties Tray Support Bracket Retaining P z j Screw E Locking Lei A gr LES K f L r e e e tin e Unplug Hose Figure 7 10 Air Pump Installation 6 Remove the retaining screw that holds the mo
34. K CUFF alarm No alarm tone should be audible Confirm that the ALARM SILENCE LED is flashing red 7 Return the ALARM VOLUME setting to 5 8 Press the SET ALARM key to enter the Set Alarm menu Check the NIBP alarm settings Set the high diastolic setting D A to 60 9 Attach an NIBP simulator to the monitor 10 Set the simulator s diastolic to 100 above the setting of the monitor s alarm 11 Listen for the medium level alarm tone It should appear at a higher pitch than the low level alarm tone It is a burst of three pulses all at the same pitch The bursts should repeat every 25 seconds 12 In the SET ALARM window adjust the SpO low alarm level above the saturation reading to cause an alarm condition 13 Verify that the message LOW SPO2 appears at the bottom of the display in red letters 14 Verify that you get an audible response The alarm should be a high priority alarm tone consisting of 3 beeps followed shortly by two beeps 15 Return the monitor to its standard default settings ALARM LED S Power the unit off then on Upon power up the speaker should provide a power up tone When pressing each front panel key there should be a tone from the speaker except for ALARM SILENCE Along with that selected function should be a change in the operation of the Unit When pressing ALARM SILENCE either the 2 minute LED solid red or the OFF LED flashing red illuminates depending on the length of time the key is
35. OOR POET TE AY FNL NIBP MOD KEYED AY CBL AC CHRGR W CN 507E AY SPEAKER MODEL 602 10 1 AY CABLE ANALOG OUT 507E SOCKET DB 9 PNL MT RECEPT BNC ISO PNL MT TUBING SHRINK 062 CLR TUBING SHRINK 125 CLR TUBING SHRINK 250 CLR Criticare Systems Inc Section 9 Drawings and Schematics Main ECG Resp Temp 95722A001 AY MAIN ECG TEMP 507ELC2 Assembly Item CSI Part Description 01 40123B004 P H M S 4 40X 250 NY WHT 02 40557B009 SPACER HEX 4 40X 75L NY 03 41647B003 SPCR HEX 4 40X 500 M F NY 04 41785B001 SHIELD ECG 507E 05 41786B001 SHIELD OXIMETER 507E 06 91369A003 AY PCB MAIN BOARD 507ELC2 07 91295A001 AY PCB 507E ECG DAUGHTER 08 82510B001 EMI CONNECTOR PLATE 09 42349B001 DRIP SHEILD MAIN BRD Criticare Systems Inc Scholar IIl 507ELC2 Service Manual Page 9 5 NIBP Assembly Section 9 Drawings and Schematics Item NIBP Mounting Base NIBP VALVE PUMP ASSEMBLY 91753A002 Item 02 03 04 93755A005 93251A002 AY FNL NIBP MOD KEYED CSI Part 40283B001 40883B001 41263B001 42292B001 42295B001 91255A005 93251A002 93755T005 Description WASHER FLAT 4 NY 062 NUT HEX 4 40 NYLON LABEL GENERIC SERIAL NO BAXTER NIBP BOX BAXTER MODULE FOAM AY PCB NIBP BAXTER AY NIBP MTG BASE NIBP MODULE AY TEST PROC AY NIBP MTG BASE CSI Part 40067B001 40874B004 41669B001 41574B001 41575B001 41577B001 90772A001 90773A001 90774A001 90775A001 91753A002 91754A002 40006B002 41579B003 40296B002
36. Scholar lll Model 507ELC2 Service Manual 0413 Cat No 1408 Part No 39154B101 Date 07 05 Revision 2 Copyright Page ii COPYRIGHT CRITICARE SYSTEMS INC 2004 2005 CRITICARE SYSTEMS INC Criticare owns all rights to this unpublished work and intends to maintain this work as confidential Criticare may also seek to maintain this work as an unpublished copyright This publication is to be used solely for the purposes of reference operation maintenance or repair of Criticare equipment No part of this publication may be reproduced in any manner or disseminated for other purposes In the event of inadvertent or deliberate publication Criticare intends to enforce its rights to this work under copyright laws as a published work Those having access to this work may not copy use or disclose the information in this work unless expressly authorized by Criticare to do so All product specifications as well as information contained in this publication are subject to change without notice All information contained in this publication is believed to be correct Criticare Systems Inc shall not be liable for errors contained herein nor for incidental or consequential damages in connection with the furnishing performance or use of this material This publication may refer to information and products protected by copyrights or patents and does not convey any license under the patent rights of Criticare Systems Inc nor the
37. Verify that the serial number is the same as the name plate on the bottom of the monitor 3 Press the DISPLAY key Observe that the LEDs display an 8 on all 14 segment LEDs then 0 and count to 9 Make sure that all the proper numbers display 4 Press the PRINT key The monitor should print a full character set and four lines of test bars System Checks Verify the general settings of the monitor 1 Restart the monitor Press the ON OFF key while holding the SETUP key Confirm that the background of the LCD display illuminates a bright green color when the monitor turns on The message CONFIG TO DEFAULT should appear 2 Enter the second Setup menu Set the correct TIME and DATE 3 Confirm that the line frequency LINE FREQ is set correctly The value should be set to 60 in the United States Criticare Systems Inc Scholar amp Ill 507ELC2 Service Manual Page 2 1 Section 3 Theory of Operation General Main Board Microprocessor Circuitry Power Management Watchdog Circuit LCD Controller LED Drivers Keypad Interface Criticare Systems Inc The Scholar III consists of a single main processor supporting all technologies except NIBP The software design supports this hardware philosophy by employing an RTOS to simplify prioritization of the many functions resident on the main processor The Main Board incorporates the system microprocessor memory and peripherals as well as the pulse oximetry circuitry
38. afety test press Done 15 Turn the monitor off Click on Abort if an error message appears on the computer once the monitor is off 16 Exit the service program on the computer Remove the download cable Click No to exit the program click Yes to save the data to a user specified location 17 Seal pots R1 amp RV1 on the BP Module Seal pots R86 and R17 on the Scholar IIl NIBP Board assembly 18 Using the Dynatech Cufflink simulator take two sets of readings at 120 80 for the adult mode during a cycle time of one minute Take two sets of readings at 100 65 for the neonatal mode in the Stat mode Scholar IIl 507ELC2 Service Manual Page 6 7 Section 6 Service Testing and Calibration Calibration for Analog Output Page 6 8 Set the ECG simulator for ECG performance 2Hz square wave 1mV Connect and display 1mV ECG on the LCD screen choose the filter setting OFF and Lead II configuration Use a BNC to BNC cable to monitor the analog output on the oscilloscope Adjust R112 for 1mV ECG peak on the oscilloscope Adjust R113 for zero voltage baseline on the oscilloscope Repeat steps 2 and 3 until both 1mV peak and zero base line are seen simultaneously Disconnect the BNC cable Check DB 9 connector for telemetry compatibility Verify 5V is present at pin 9 of the DB 9 connector Scholar IIl 507ELC2 Service Manual Criticare Systems Inc Section 6 Service Testing and Calibration
39. al Page 5 3 Section 5 Preventative Maintenance Battery Safety Battery Replacement Removing the Battery Page 5 4 The batteries require no maintenance For more information refer to the Scholar II Model 507ELC2 Series Operator s Manual The 1 o N A CAUTION A Do not short circuit the battery terminals The resulting high current discharge can cause burns Charge the battery completely after extended battery use to ensure a fully charged battery is available for the next use Explosion hazard Keep lighted cigarettes sparks and flames away from the battery The battery contains sulfuric acid electrolyte that can cause severe burns and eye damage as well as illness from sulfur oxide fumes Do not crack cut burn or dissolve with solvents the battery case Damaging the battery case can cause the release of sulfuric acid If sulfuric acid is released from the battery wear eye protection and rubber gloves to handle the battery and use a solution of baking soda in water to neutralize the sulfuric acid The used battery is a potential environmental hazard and must be disposed of properly Dispose the old battery in accordance with local and federal laws Do not incinerate battery access door is on the bottom of the monitor Turn the monitor off and disconnect the charger cord from the back of the monitor Turn the unit upside down and place it on the work surface Pull the rubber inserts strai
40. ard Mediation sssssssss 1 13 Potential literfereriCe ooi noii ee te ite EE 1 13 Use of Anesthetics ele ele ll UE Latex COmMent EE Section 2 Service Interface Service lee 2 1 Sel TOStS MOL ce 2 1 System Ghecks s oe See Aa ad eines 2 1 Scholar Ill 507ELC2 Series Service Manual Page iii Page iv Section 3 Theory of Operation General 5 EA Ra ON a Main Board enisi AG euet rne Microprocessor Circuitry Se Power Management Watchdog Circuit essen 3 1 Balgeet te EE LED Drivers iio ee eh fin wan EE EE A ea Keypad Interface is eio RE REPERI OE a a SRI MISERE NIBP Module Interface x External RS 232 Serial Data Pont 3 2 Analog Output Interface nennen nnne 3 2 Internal Recorder 8 2 Speaker Control 9 2 Power Management 3 3 Software Design Main Board 3 3 Oystem Drvo S EE E EUREN 3 3 External Service Tools 3 4 Main Board Software Upgrade NIBP Module Software Upgrade 13 4 NIBP Module Service Tool 3 4 Power app costes iore rie eredi eR rr rd EES 3 5 SpO Board neni nette oi ene inre mre eren 3 6 Temperature nnne ette denne teet ttt treten nete nes 3 6 Impedance Resplratiom ik ous ee eet Deere qa reete e aena EA 3 6 Block Diagrams AE System Level Block Diagoram nennen 3 7 Hardware Block Diagoram enne einn nn
41. ce Inspection Manual Controls Check Alarms Verification dei iiie eie ee deeg E Vital Sign Modules Verification ECG Verification Oximeter SpO Verification NIBP Verification aot eae et e eet died as Temperature Vertticatton nennen Printer Testing Scholar IIl Final Test Check Sheet Section 6 Service Testing and Calibration Field Service Testing Safety 2 ici cette ls 6 1 Field Service Test Matrix 3 Equipment Required m NIBP Calibration i ET NIBP Module Setup eene nennen nennen Calibration for Analog Output o Power Supply Performance eese nennen enne nente nenne nnne Charger Operation WEE Verify Centered ECG Baseline eene 6 9 Verify Low Battery eee eee ecee eee e eee seaeeeseeseeeseeeesaeesaeseeeenaeseaeeed 6 10 Verify Shut off Display Checks x mtt eet cete e btt en esed tem thie n 6 10 Check DB 9 Connector for Telemetry Compatibility sse 6 10 Set Time and Date Mechnical Inspection 1 23 ft eve ive er e eee ek Section 7 Disassembly General Gaution 0c one ERAI RP 7 1 Battery Replacement wae 7 2 Battery Removal ss 7 2 Battery Installaton nennen nennen 7 3 Main Board Replacement eese enne nnne nennen nennen enne 7 4 Main Board Removal 7 4 Main Board Installation
42. ce connects the front panel display controls to the Main Board There are four column drive outputs and three row sense inputs Scholar IIl 507ELC2 Service Manual Page 3 1 Section 3 Theory of Operation NIBP Module Interface External RS 232 Serial Data Port Analog Output Interface Page 3 2 Internal Recorder Speaker Control The NIBP technology module is controlled from the microprocessor through a logic level serial interface The microprocessor has a POWER ON control line which when asserted switches on power to the NIBP module This line is inactive at power up and asserted by the initialization software which permits a staged powerup of this major system component The Scholar Ill provides one patient isolated external RS 232 serial data port TX RX and ground This is compatible with Central Station and ASCII printer applications RF MODEM SUPPORT For wireless Central Station applications the interface must be capable of powering an external RF modem 5VDC 100 mA maximum The Scholar Ill has one patient isolated external analog output This will provide a 1 v output capable of driving a high level input such as a defibrillator or chart recorder The microprocessor includes a PWM timer to generate the analog signal The model 507ELC2 contains an internal recorder as standard equipment the 507ELC2 EX does not have an internal printer This recorder contains of a single stepper motor for paper movement whi
43. ches to the 507ELC2 monitor and a detachable cord that plugs into the wall The detachable cord should be correct for your country s power grid If you have the wrong cord contact Criticare Systems for the correct cord The transformer box is not field reparable If the transformer has failed return it to Criticare Replace broken cracked or loose AC receptacles Replace the receptacle if the external pins are bent or broken Do not attempt to remove or modify the ground pin Check the transformer and cables for damage before replacement Measure the icoming and outgoing voltages and assure they match the specifications printed on the transformer box Scholar IIl 507ELC2 Service Manual Page 8 5 Section 9 Drawings and Schematics List of Drawings Criticare Systems Inc Title Final Assembly Front Bezel Active Chassis Assembly Main ECG Resp Temp Assembly NIBP Assembly NIBP Mounting Base NIBP Valve Pump Assembly NIBP Valve Switch Assembly Printer Recorder Assembly Main Board PCB Main Board Schematic ECG Resp Temp Daughter PCB ECG Resp Temp Daughter PCB Schematic NIBP PCB NIBP PCB Schematic Interconnection PCB Interconnection PCB Schematic LED Display PCB LED Display PCB Schematic Scholar Ill 507ELC2 Service Manual Drawing Number 93971A001 92522A001 92791A001 95722A001 93755A005 93251 A002 91753A002 91754A002 95721A001 91369A003 913695003 91295A001 912958001 91255A005 912558005 91367A001 9
44. contrast in Setup menu Connect J1 J3 and or J4 Criticare Systems Inc Scholar Ill 507ELC2 Service Manual Page 8 1 Section 8 Troubleshooting Symptom Problem Solution RS 232 interface Cable to DB 9 connector on rear Connect cable doesn t work panel is disconnected or loose J13 on Main Board is disconnected Connect J13 or loose LEDs don t come on e LEDs are turned off in software Enter Setup menu set LEDs to ON Refer to Operator s Manual Troubleshooting and Repair A Ate ComfortCuff NIBP Module Page 8 2 Before attempting to repair a damaged monitor the technician must fully understand the functions of the monitor The service technician should have read and understood all the previous sections of this manual You must fully repair calibrate and test all damaged monitors before you use them on patients The monitor must meet the original operating specifications before you use it on a patient Always follow ESD precautions when performing any of the procedures discussed in this section The NIBP module pn 93755A005 consists of a pneumatic pump assembly pn 90772A001 and control circuitry located on the NIBP Board pn 91255A005 The pneumatic assembly is mounted on a mounting plate that is mounted to the frame of the monitor A large diameter tube pn 41700B002 connects to the Quick Connect hardware fixture A small diameter tube pn 41700B001 connects to the trans
45. ctivating the service mode at power up the monitor attempts to locate any service tool attached to the external serial port If it locates a service tool the Scholar Ill is under control of the service tool permitting execution of diagnostic or software upgrades The initial software installation and all subsequent software upgrades is in flash memory and is downloaded through the external serial port The monitor shall not perform patient monitoring during software downloads Initiate the Main Board software installation operation by holding the DOWN arrow key while you apply power to the unit The software installation screen appears with the message SERVICE TOOL IN PROGRESS Upgrade the NIBP module through the external serial port The monitor shall not perform patient monitoring during software downloads The NIBP module software installation operation is initiated by holding the NIBP START STAT STOP key while you apply power to the unit The software installation screen appears with the message NIBP SERVICE TOOL IN PROGRESS The NIBP module Service tool permits execution of the inflation deflation speed test leakage test calibration and safety checks through a program running on an attached PC The software installation screen appears with the message NIBP SERVICE TOOL IN PROGRESS Scholar amp IIl 507ELC2 Service Manual Criticare Systems Inc Power Supply Criticare Systems Inc Section 3 Theory of Operation
46. ducer on the NIBP Board The remaining pneumatics links connect the two control valves pn 90774A001 and 90775A001 the pump pn 84500B001 and the check valve pn 41579B003 As the tubing ages it may lose its seal Old tubing can be re seated or replaced as necessary When any major pneumatic component such as a pump or valve is replaced the NIBP module must be re calibrated as in Service Testing and Calibration in Section 6 of this manual The manufacturer recommends that the monitor be returned to a CSI authorized service facility if pump replacement is required Scholar amp IIl 507ELC2 Service Manual Criticare Systems Inc ECG Respiration Temperature Module Board Settings and Module Software Respiration Temperature Criticare Systems Inc Section 8 Troubleshooting The ECG module is located on the ECG Resperation Temperature Board assembly pn 91295A001 that is attached to the Main Board The ECG Resp Temp Board fits directly on to the Main Board through a socketed 20 pin connection on the component side of the Main Board assembly There is also a shielded cable assembly that extends from the top of the board to the external ECG port Check each of these connection points if the monitor fails to produce an accurate ECG waveform The ECG Resp Temp Board has a foil shield to reduce noise from other portions of the monitor Noise can be introduced by worn cable assemblies and degraded power supplies
47. e NIBP Cycle Time to two minutes 120 80 OPERATION SETTING Use an adult dummy cuff for this test Set the initial Dynatech Nevada NIBP simulator settings of Adult at 120 80 90 and Heart Rate at 80 bpm 1 Press the SETUP key In the monitor s SETUP 1 window set the Patient Size to Adult mode 2 For the Pressure Cure Adjustments set SHIFT to 0 zero and GAIN to 100 3 Press the NIBP START STAT STOP key 4 Allow the monitor to take at least three readings Systolic and diastolic readings should appear The average of the three readings should be within 496 or 4mmhg of all the readings taken 5 Recalibrate the monitor if necessary 80 50 OPERATION SETTING Use a neonate dummy cuff for this test Set the initial Dynatech Nevada NIBP simulator settings of Neo at 80 50 62 1 Set the monitor to the Neonate mode 2 To verify STAT mode operation press and hold the NIBP START STAT STOP key 3 Allow the monitor to take at least three readings Systolic and diastolic readings should appear on the display 4 Take the average of the three readings Each reading should be within 496 or 4mmhg of all the readings taken Criticare Systems Inc Scholar amp Ill 507ELC2 Service Manual Page 5 17 Section 5 Preventative Maintenance Temperature Verification 1 Press the SETUP key to enter the SETUP MENU 1 2 Press the SETUP key until TEMPERATURE highlights 3 Using the UP or DOWN Arrow turn the temperature function on 4
48. e monitor on the side of the handle see Figure 7 6 Recorder Printer Module Retaining Screw lt E TJT Figure 7 6 Recorder Printer Module Retaining Screw Criticare Systems Inc Scholar amp Ill 507ELC2 Service Manual Page 7 9 Section 7 Disassembly Page 7 10 4 5 o Turn the monitor right side up The recorder printer module should now be somewhat loose However the module must be detached in order to disconnect its cable from the Main Board Open the paper door by pressing in on the tab on the rear of the paper door while lifting the door up and forward Remove the roll of paper by first raising the paper release lever Then remove the roll of paper from the chamber NOTE Do not remove the recorder printer module before disconnecting the flat flex cable a Insert screwdriver Figure 7 7 Recorder Module Removal Using along flat blade screwdriver insert the blade into the hole where the tab of the paper door was resting see Figure 7 7 Recorder Module Removal Press the blade firmly between the module housing retaining tab and the cutout in the top cover of the 507ELC2 At the same time gently lift up on the module housing The recorder printer module should dislodge from the top cover at this time Close the paper door to prevent the roll of paper from escapin
49. e performace specifications listed in this manual Criticare Systems Inc Scholar amp Ill 507ELC2 Service Manual Page 1 5 Section 1 Introduction Cuff Inflation and The maximum cuff inflation rate is 15 mmHg sec The software limits Pressure Protection inflation to 300 mmHg adult or 150 neonate A secondary circuit limits maximum possible cuff pressure to 316 mmHg Cuff pressure is allowed to remain above 30 mmHg for a maximum of two minutes The monitor automatically deflates the cuff if the time limit is violated The monitor contains hardware protection for overpressure conditions pressure transducer failures or microprocessor and pump control circuit failures 140 B P Cuff Inflation Pressure 130 Shown during inflation 120 v Systolic Pressure 110 JE ER 400 z Actual Blood t Pressure Waveform i HIV J S NUM 80 V Diastolic Pressure e 70 5 60 1 A p Ds i Cuff deflates rapidly a after monitor determines a x Pulse Waveform a d systolic pressure Measured from B P Cuff Pressure YU Jon a Fluctuation Diastolic Mean Systolic Pressure Pressure Pressure Figure 1 2 NIBP Cuff Pressure and Pulse over Time Page 1 6 Scholar IIl 507ELC2 Service Manual Criticare Systems Inc Temperature Measurement Criticare Systems Inc Section 1 Introduction Body temperature is measured by the monitor using a thermistor temperature sensing elements in
50. eck Criticare Systems Inc 1 T Verify that a readable screen displays For a guide to proper screen layout refer to Section 3 Setup Procedures in the Scholar Ill Model 507ELC2 Series Operator s Manual for sample screens Verify that the screen display is clear and bright when directly facing the monitor Verify the image quality There should be no intermittence or jittering of pixels The maximum amount of pixels missing from any display are as follows Maximum number of bad dots allowed per screen is 7 Maximum number of bad dots within any 20mm circle is 2 Press the FREEZE key to freeze the bottom two ECG waveforms The top ECG waveform remains in real time Verify that you get an audible response from the speaker Press the DISPLAY key to unlock the waveforms Press the START STAT STOP key Verify that you get an audible response from the speaker The pump should operate Press the SET ALARM key Verify that you get an audible response from the speaker A Set Alarm window appears on the display Press the SET ALARM key and verify that the curser moves from item to item on the menu Press the DISPLAY key to close the Set Alarm window Press the SETUP key Verify that you get an audible response from the speaker A Setup window appears on the display Press the SETUP key and verify that the curser moves from item to item on the menu Press the DISPLAY key to close the Setup window Pr
51. effects on safety reliability and performance of the Scholar IIl 507ELC2 patient monitor if assembly operations extensions readjustments modifications or repairs are carried out by persons other than those authorized by Criticare Systems Inc or the Scholar IIl 507ELC2 patient monitor is not used in accordance with the instructions for use or the electrical installation of the relevant room does not comply with NFPA 70 National Electric Code or NFPA 99 Standard for Health Care Facilities Outside the United States the relevant room must comply with all electrical installation regulations mandated by the local and regional bodies of government CRITICARE SYSTEMS INC Telephone 262 798 8282 20925 Crossroads Circle Tech Support 800 458 2697 Waukesha WI 53186 Orders 800 458 4615 USA Fax 262 798 8290 Internet www csiusa com Scholar lll 507ELC2 Service Manual Page vii Service Return Policy Return Procedure Incoming Inspection Page viii In the event that it becomes necessary to return a unit to Criticare Systems Inc the following procedure should be followed Obtain return authorization Contact the CSI Service Department at 800 458 2697 to obtain a Customer Service Authorization CSA number Outside the US call 001 262 798 8282 The CSA number must appear on the outside of the shipping container Return shipments will not be accepted if the CSA number is not clearly visible Please provide the
52. ent and immediately report the discrepancy to the CSI Service Department Scholar lll 507ELC2 Service Manual Criticare S ystems Inc EC Declaration of Conformity Scholar Ill 507ELC2 Patient Monitor Representative in the European Union Criticare Systems Inc To view the Declaration of Conformity visit the Criticare website at www csiusa com A copy of the Declaration can also be faxed Contact Criticare s customer service department at 262 798 8282 to obtain a faxed copy of the Declaration Frank Henaghan Frank Henaghan Criticare Systems Inc Fax 44 151 342 7208 P O Box 48 Frank Henaghan Q csiusa com Heswall CH616TZ United Kingdom Scholar Ill 507ELC2 Service Manual Page ix Section 1 Introduction Description Intended Use Criticare Systems Inc The Scholar Ill model 507ELC2 series patient monitors interpret and display real time physiological data including waveforms and numerical data The monitor is designed for multi parameter measurements including ECG NIBP SpOs temperature and respiration For all these vital parameters the 507ELC2 monitor has limit alarms and alerts The model 507ELC2 series comes equiped with a TFT color display The 507ELC2 monitor also prints strip chart recordings and stores tabular trends for review The 507ELC2 EX does not have print capabilities NOTE All illustrations in this manual are of the Model 507ELC2 The 507ELC2 series monitor is intended to monitor phys
53. er consumption when line power is not available The Scholar Ill Main Board software is a collection of initialization routines interrupt service routines drivers and RTOS tasks The interrupt service routines communicate directly with the RTOS by signaling events and indirectly by filling circular data buffers to be consumed by RTOS tasks In C programming the following suffixes are used SVC an interrupt service routine _TASK an RTOS task number MAIL an RTOS mailbox number TIMER an RTOS timer EVENT an RTOS event number RESOURCE an RTOS resource number The software design description is organized as follows Data elements including key data structures initialization and reset self test code Interrupt service routines ISRs Drivers and Tasks System drivers are low level non ISR functions primarily responsible for hardware interfacing LCD DISPLAY DRIVER This driver communicates to the LCD controller in a synchronized fashion to perform graphics plane and text plane updates without undesirable side effects LCD CONTRAST DRIVER This driver interacts with digital potentiometer circuitry to provide LCD contrast initialization and adjustment via software WATCHDOG DRIVER The watchdog timer must be periodically cleared to prevent a system reset from taking place Since the Main Board software is built around an RTOS it is desirable to make the watchdog clear logic dependent upon recognition of proper
54. ess and hold the SETUP key Verify that you get an audible response from the speaker followed by a double beep and the second Setup window displays Press the SETUP key and verify that the curser moves from item to item on the menu Set the DATE and TIME for the real time clock Press the DISPLAY key to close the Setup window Press the DISPLAY key Verify that you get an audible response from the speaker An ECG 50MM window appears on the display Press the DISPLAY key again Verify an audible response from the speaker A Numerical Display window appears on the display Press the DISPLAY key again Verify an audible response from the speaker A Three lead window appears on the display The three leads should be ECG Cascade and SpO Scholar amp Ill 507ELC2 Service Manual Page 5 11 Section 5 Preventative Maintenance 7 Press the TREND key Verify an audible response from the speaker A Trend window appears on the display Press the DISPLAY key to close the Trend window 8 Press the PRINT key Verify an audible response from the speaker The printer prints a test strip SPEAKER Verify speaker operation 1 Plug an SpO sensor into the SpO port on the 507ELC2 Wait for the SpO to detect a pulse 2 3 Press the SETUP key to open the Setup window 4 Press the SETUP key to highlight Pulse Vol Use the UP ARROW and the DOWN ARROW keys and verify that the speaker increases and decreases in sound at a constant rate
55. essure Board installation procedure found in Blood Pressure Board Installation on page 7 16 Perform the Main Board installation procedure found in Main Board Installation on page 7 7 Slide the top cover down onto the monitor Turn the monitor upside down Install and tighten the four screws that hold the top cover to the monitor 10 Perform the battery installation procedure in Battery Installation on page 7 3 Scholar amp Ill 507ELC2 Service Manual Page 7 21 Section 7 Disassembly Pressure Switch Replacement Pressure Switch Removal 1 Pressure Switch Installation 1 Page 7 22 Follow the caution for static sensitive devices in General Caution on page 7 1 Perform the battery removal procedure at Battery Removal on page 7 2 Perform the Main Board removal procedure found in Main Board Removal on page 7 4 Perform the Blood Pressure Board removal procedure found in Blood Pressure Board Removal on page 7 15 Two wires supply the pressure switch see Solenoid Valve and Pressure Switch Installation on page 7 20 To remove the pressure switch you must unplug these wires from the J7 connector First clip the wire tie that holds the pressure switch wires in the wire harness see Wire Position and Removal from J7 Connector on page 7 18 Label the connector at J7 Use a thin object with a fine point e g a very small screwdrive
56. ffect to the monitor from electrocautery and electrosurgery infrared energy and defibrillation Do not use this device in conjunction with flammable anesthetics such as cyclopropane and ether The monitor can sample from pure oxygen environments but the monitor itself should never be placed inside an oxygen tent or gas containment apparatus Proper anesthetic gas waste recovery should be used All patient contact or user contact materials in this monitor and it s accessories have passed ISO 10993 5 10 amp 11 biocompatibility tests or have been in use in clinical environments in large numbers over an extended period of time predating these standards All Criticare Systems Inc products including patient monitors and accessories are free from latex in any location that may result in patient contact Scholar amp Ill 507ELC2 Service Manual Page 1 13 Section 2 Service Interface Service Mode NWARNING N Never service a monitor while it is attached to a patient Never enter the service menu while monitoring a patient Self Tests To verify the built in self tests 1 Press the ON OFF key and the DOWN ARROW key of the monitor at the same time The monitor displays the message CHECKING FOR SERVICE TOOLS If no communications cable is attached the monitor should continue to the self tests The following message displays SELECT A TEST 2 The software revision and the serial number display on the monitor
57. formance NOTE Do not power up the 507ELC2 monitor during Hi Pot steps MAINS INPUT TO POWER GROUND TEST 1 Connect the red lead of the tester to the shorted black white of the AC input test connector Plug the test connector into the Cat 924 AC input Connect the black lead of the tester to the power ground green wire of the AC input test connector NOTE Do not connect to the capacitor Connect directly to ground 2 Turn on the tester power Press the TEST switch 1500 VAC is applied to the 507EL monitor for 1 second No voltage breakdown HI POT FAIL indication should occur 3 Hi Pot hot and neutral to ground with 1500VAC 2mA for 1 second a Connect the CSI CORD HI POT SETUP CABLE into the Transformer CAT 924 with the RED lead of the Hi Pot connected to the shorted black and white hot and neutral of the CSI CORD HI POT SETUP CABLE b Place the BLACK lead of the hipot tester to the green wire ground of the CSI CORD HI POT SETUP CABLE c Conduct the test and verify that the Hi Pot tester indicates pass Page 5 6 Scholar amp IIl 507ELC2 Service Manual Criticare Systems Inc Section 5 Preventative Maintenance 4 Hi Pot BNC to ground with 1500VAC 2mA for 1 second a With the same setup as above move the RED lead of the Hi Pot tester to the BNC connector b Conduct the test and verify that the Hi Pot tester indicates pass MAINS INPUT TO PATIENT EXTERNAL EQUIPMENT CONNECTION TEST NOTE For
58. g NCAUTION A J17 is delicate The locking mechanism of J17 is not removable from the body of the connector Should it detach it cannot be repaired J17 resides on the Main Board directly beneath the recorder printer module Using either the fingers or a small flat blade screwdriver gently open J17 by pushing pulling the two ears of J17 towards the front of the 507ELC2 until it stops The flat flex cable from the recorder printer module will now easily remove from J17 Place the recorder printer module aside on an ESD protective surface Scholar amp IIl 507ELC2 Service Manual Criticare Systems Inc Recorder Printer 1 Installation Section 7 Disassembly Follow the caution for static sensitive devices in General Caution on page 7 1 Ensure that the locking mechanism of J17 is in the open position in order that it may accept the flat flex cable from the recorder printer module If necessary pull the locking mechanism forward towards the front of the monitor until it stops Note the end of the flat flex cable of the recorder printer module has exposed contacts on one side The flat flex cable must be installed with this side of the flex cable facing down towards the Main Board of the monitor that is contact side down While holding the recorder printer module in one hand insert the flat flex cable contact side down into the opened J17 connector The cable must be inserted all the way into J
59. g Digital signal processing in the microprocessor results in lower noise from circuitry components resulting in a cleaner signal and better performance under low perfusion conditions There is also improved rejection of noise from the patient and environment due to the availability of the true unfiltered sensor signal for digital signal processing The digital pulse oximeter measures oxygen saturation and pulse rate using the principles of spectrophotometry and plethysmography The sensor is completely non invasive and there is no heat source that could burn the patient The pulse oximeter sensor contains two types of LEDs each type emits a specific wavelength of light Since oxygenated hemoglobin and deoxygenated hemoglobin absorb light selectively and predictably the amounts of these two compounds can be determined by measuring the intensity of each wavelength that passes through the measuring site The light from the LEDs shines into a pulsating vascular bed A photodetector located opposite or alongside the LEDs measures the intensity of each wavelength transmitted through the monitoring site The light intensity is converted to an electrical signal which is input to the monitor The effects of skin pigmentation venous blood and other tissue constituents are eliminated by separating out the pulsating absorption data Scholar III 507ELC2 Service Manual Criticare Systems Inc SpO Clinical Testing and Accuracy Heart
60. ght up to remove them from the feet Remove the three Phillips screws Tilt the battery cover up from the front edge You may need to gently pry the cover open with a small flathead screwdriver Lift the battery cover straight up to remove it NCAUTION A In the next step be sure to pull only on the battery end of the cable NOT the end of the cable that is connected to the monitor Gently pull on the wires attached to the battery terminals to lift the battery out of the battery compartment Scholar amp IIl 507ELC2 Service Manual Criticare Systems Inc Installing the New Battery Battery Maintenance Long term Storage Disposal Criticare Systems Inc Section 5 Preventative Maintenance 8 Release the latch on the battery cable connector 9 Disconnect the battery cable at the connector WARNING N The used battery is a potential environmental hazard and you must dispose of it according to local requirements or return it to CSI 1 Connect the cable from the new battery to the battery cable connector on the monitor 2 Position the battery cable so that it is not pinched or excessively pulled Slide the new battery into position in the battery compartment 3 Reattach the battery compartment door with the three Phillips screws The short screw goes in the middle 4 Reattach the rubber inserts to the feet NOTE When you replace the feet be sure to align the small projection on each foot w
61. gradation or loss of calibration due to analog components Interference or noisy signal can be due to a worn cable assembly or DB 9 connector Replace the connector and cable assembly if necessary Always check the sensor when intermittent problems are reported Stretched or otherwise damaged sensor cables must be replaced NOTE The line frequency setting of the monitor must be set correctly for optimal SpO monitoring The Main Board pn 91369A001 contains the primary processors storage memory NIBP circuitry communication interfaces audio driver vital signs module connections power regulation and video generation and keypad inputs User I O The main ground cable pn 95637A001 and the display ground cable pn 95642A001 are part of the Main Board assembly There are two CPUs on the Main Board that you must program from a CSI Service Download Station The programmable settings remain in non volatile memory Repair or improper handling of the Main Board can corrupt this software See procedure 91340T003 for more information There is one replacable 3 amp fuse pn 82004B001 for the battery input at F1 There is one replaceable fuse pn 82003B001 for the power supply module at F2 Scholar amp IIl 507ELC2 Service Manual Criticare Systems Inc CAT 924 Battery Charger Criticare Systems Inc Section 8 Troubleshooting The CAT 924 Battery Charger pn 90250A001 consists of of a transformer a fixed cord that atta
62. hat the glue has made a strong and complete bond with the bezel Scholar amp IIl 507ELC2 Service Manual Criticare Systems Inc Section 7 Disassembly 4 Install the Display Interface Board and LED boards by performing the Display Interface Board and 7 segment LED Board Installation on page 7 26 SpO Sensor Receptacle General If the SpO sensor receptacle is defective you must replace the front bezel see Wire Position and Removal from J7 Connector on page 7 18 A new bezel contains a new SpOz sensor receptacle and a new keypad membrane To replace the bezel perform the Display Interface Board and LED Board removal procedure found in Display Interface Board and 7 segment LED Board Removal on page 7 25 on the old bezel Then install the boards into the new bezel by performing the Display Interface Board and LED Board installation procedure found in Display Interface Board and 7 segment LED Board Installation on page 7 26 Criticare Systems Inc Scholar amp Ill 507ELC2 Service Manual Page 7 29 Section 8 Troubleshooting Troubleshooting Table This section lists the possible causes of monitor problems Use these tables and the schematics in Drawings and Schematics in Section 9 to identify and locate components that malfunction Symptom Problem Solution Unit won t power up Battery is discharged AC charger is not securely connected to monitor AC power cord is not
63. hat you use the Alarms Verification on page 5 13 as an incoming inspection test You can perform additional electrical safety testing in this section as part of an incoming inspection in accordance with the policies of the health care provider Maintenance Schedule Every Patient Clean and disinfect the NIBP cuff as needed Inspect clean and disinfect the oximeter sensor Inspect the accessories and charger for damage Every Day Charge the monitors battery as necessary Every 3 Months Clean the exterior of the unit or clean as needed Every Year Perform the annual safety tests described in the service manual Criticare Systems Inc Scholar amp Ill 507ELC2 Service Manual Page 5 1 Section 5 Preventative Maintenance Monitor Safety Testing You can perform the following tests as part of a periodic safety check The following safety tests are designed so that the monitor s warranty seal does not have to be broken If the monitor fails any portion of these tests contact the CSI service department The contents of this section include the following verifications and safety tests Electrical Safety Testing Withstanding Voltage Hi Pot Electrical Leakage Functional Testing including nterface Inspection Manual Controls Check Alarm Verification Vital Sign Modules Verification e ECG e SpOs NIBP Temperature Internal Printer Communications Criticare recommends that you run a
64. hold the harness together see Air Pump Installation on page 7 17 Label the connector at J7 Use a thin object with a fine point e g a very small screwdriver to depress the latch on the female terminal end and pull gently on the wire to remove it from the J7 connector Be sure to note the positions of the red and black wires in the connector before removing them You must return the wires to the original positions when you reassemble Scholar amp IIl 507ELC2 Service Manual Criticare Systems Inc Solenoid Valve Installation Criticare Systems Inc 1 Section 7 Disassembly Remove the screws from the valve block Retain the plastic spacer that is beneath each screw The spacers are used for reassembly Lift the solenoid valve out of the monitor Plug the hoses onto the valve see Solenoid Valve and Pressure Switch Installation on page 7 20 2 Set the valve into position in the monitor 3 Apply Loctite 425 CSI Cat No 41157B001 to the valve retaining screws Insert the screws into the valve block Place a plastic spacer beneath each screw Tighten the screws Slide the terminal ends of the valve wires into connector J7 Wire Position and Removal from J7 Connector on page 7 18 Be sure that the terminal latch on each wire locks into its slot Be sure that all wires are in their original positions in the connector 5 Install new wire ties on the wire harness Perform the Blood Pr
65. iological parameters of patients within clinical care settings It is intended that the user is a professional health care provider Physiological data system alarms and patient data analysis are available to the care provider from the monitor The user is responsible for the interpretation of the monitored data that is made available Physiological data should be reviewed by a qualified clinical personnel prior to any medical intervention Figure 1 1 Model 507ELC2 Vital Signs Monitor Scholar amp Ill 507ELC2 Service Manual Page 1 1 Section 1 Introduction Pulse Oximetry Measurement SpO DOX Digital Oximetry Page 1 2 Definition Method The monitor uses Digital Oximetry DOX technology to measure blood oxygen saturation SpO Hemoglobin exists in the blood in several forms Oxygenated Oxyhemoglobin Reduced Deoxyhemoglobin Dyshemoglobins carboxyhemoglobin and methemoglobin In the monitor SpO pulse arterial oxygen saturation is the ratio of oxygenated hemoglobin to the sum of oxygenated hemoglobin plus hemoglobin which is available for binding to oxygen as expressed in the following formula oxyhemoglobin i SS x100 percentoxygenisaturation oxyhemoglobin deoxyhemoglobin Dyshemoglobins such as carboxyhemoglobin and methemoglobin are not directly measured and therefore are not factored into the measurement The monitor does not use analog circuitry for signal processin
66. it powered up Press and hold the SETUP key to enter SETUP MENU 2 2 Press the SETUP key to highlight TIME and DATE 3 Change them to the current time and date using the UP and DOWN arrows Scholar amp IIl 507ELC2 Service Manual Criticare Systems Inc Section 6 Service Testing and Calibration Mechnical Inspection 1 Using the steps below perform a mechanical inspection of the unit a Ensure that all connectors are secure and locked b Ensure that all fasteners are in place and secure c Ensure that the internal pneumatics are correctly routed and secured d Ensure all internal wiring is correctly routed and secured e Ensure that all external surfaces are free from defects scratches and marks 2 Place final test sticker on the top of the NIBP MOD PCB AY bracket Criticare Systems Inc Scholar amp Ill 507ELC2 Service Manual Page 6 11 Section 7 Disassembly General Caution Observe the following caution during all removal and installation procedures in this section WARNING N Possible safety hazard Read the battery safety information provided in Introduction in Section 1 NCAUTION A Static sensitive device To prevent damage to the monitor observe the following precautions a Perform the procedure on an antistatic mat b Wear a wrist grounding strap c You should connect both the wrist strap and mat through a resistor 1 megohm typical to a good earth ground Remove the
67. ith the matching depression in the case 5 Reconnect the power cord to the monitor Allow the battery to charge for 10 hours before you operate the monitor on battery power The battery requires no maintenance No special preparation is necessary for long term storage of the monitor At the end of its useful life the monitor and its accessories may be disposed of according to your institution s policies and procedures for disposal of patient contact medical waste Alternately the monitor and its accessories may be returned to Criticare Systems Inc for safe disposal The shipping address is Criticare Systems Inc 20925 Crossroads Circle Suite 100 Waukesha WI 53186 Scholar Ill 507ELC2 Service Manual Page 5 5 Section 5 Preventative Maintenance Electrical Safety Testing Scholar IIl Withstanding Perform this test whenever opening the monitor housing and before Voltage Hi Pot Test using the monitor on patients WARNING N Shock Hazard Because dangerous and lethal voltages are present during the withstanding voltage leakage and ground continuity test all leakage and voltage testing must be done with the monitor housing in place For complete information about the proper operating and safety procedures refer to the Operator s Manual Equipment Needed The following are needed to complete this procedure Associated Research 3565D Dielectric Withstand Tester or equivalent Hi Pot tester Hi Pot Per
68. lays for BPM red SpO green and NIBP red for SYS mm Hg DIA mm Hg and Mean mm Hg If it becomes necessary to replace one of these LEDs it is necessary to replace the entire keypad membrane The keypad membrane contains all the LEDs identified in this paragraph 1 Follow the caution for static sensitive devices in General Caution on page 7 1 2 Perform the Display Interface Board and LED Board removal procedure found in Display Interface Board and 7 segment LED Board Removal on page 7 25 Co On the front side start at the upper left corner of the front bezel and use a thin blade to get beneath the plastic membrane After you lift the corner of the membrane pull with your fingers to peel the entire membrane off the front of the bezel 4 Put some denatured alcohol on a clean cloth to clean any places on the front bezel where glue remains from the membrane that you removed NCAUTION A Be certain that the bezel is completely dry before installing a new keypad membrane The solvent can damage the traces on the backside of the new membrane 1 Follow the caution for static sensitive devices in General Caution on page 7 1 2 Peel the backing sheet from a new keypad membrane to expose the glued surface on the back of the membrane 3 Carefully align the connector block on the membrane and the LEDs on the membrane with the openings in the front bezel Press down on all areas of the membrane to make sure t
69. ld from the Display Interface Board Criticare Systems Inc Scholar amp Ill 507ELC2 Service Manual Page 7 25 Section 7 Disassembly 11 Label the cable connected to P7 Reach underneath the edge of the Display Interface Board near the P7 header connector and gently lift upward until P7 unplugs As a single unit lift the Display Interface Board and the 7 segment LED board out of the front bezel 12 To separate the 7 segment LED Board from the Display Display Interface Board 1 and 7 segment LED Board Installation 9 Interface Board label and disconnect the header connectors marked P1and P2 on the Display Interface Board Join the 7 segment LED Board with the Display Interface Board by plugging together the header connectors marked P1 and P2 on the Display Interface Board see Front Bezel Assembly on page 7 27 Set the assembled boards into the front bezel Carefully align the pins and then plug the P7 header connector on the Display Interface Board into the header block inside the front bezel Install and tighten the four screws that hold the Display Interface Board to the threaded supports inside the front bezel Set the EMI shield down onto the Display Interface Board The top and bottom edges of the shield must fit inside the front bezel Install the two screws that hold the shield to the Display Interface Board Slide the front bezel down into the monitor chassis Set the loudspeaker int
70. le the formation of text and graphs is accomplished through a line of 384 thermal dots This design permits higher recording speed Because of the enhanced recording capability the 507ELC2 provides real time graphical waveform recording at either 25 or 50 mm sec Tabular printing demand or interval is always at 25 mm sec The internal printer control consists of three components Initialization Arasterizing print engine and A print driver in the interrupt service routine The functions are inactive if the printer is not installed this is determined during initialization The functional interface of the PRINT TASK activates the rasterizing of text and graphics and controls the print driver The speaker drive circuit is a DAC controlling speaker volume and an output pin to control frequency The speaker is driven by a square wave signal generated by a software controlled timer hence any drive frequency has harmonic components and no pure tones are generated This reduces the risk of an alarm being missed by an individual with a notch hearing deficit Scholar amp IIl 507ELC2 Service Manual Criticare Systems Inc Power Management Software Design Main Board System Drivers Criticare Systems Inc Section 3 Theory of Operation This circuit Monitors power sources and utilization Informs the main processor of an impending power outage and Permits the shutdown of selected sub systems to reduce pow
71. lect impedance variations across the thorax which in turn reflect respiration activity as well as other phenomena including cardiogenic artifact and motion artifact Scholar amp IIl 507ELC2 Service Manual Criticare Systems Inc Section 3 Theory of Operation Block Diagrams The following pages contain the block diagrams for the Scholar III 507ELC2 patient monitor System Level Block MAIN GPU E Diagram EXTERNAL AC DC POWER PACK pa I x s E 7 s 7 AUDIO LCD KEYPAD LED s POWER DISPLAY BATTERY i SUPPLY SERIAL I ANALOG OUT NIPB MODULE INTERNAL PRINTER l 507ELC2 only AR42 RECORDER Criticare Systems Inc Scholar III 507ELC2 Service Manual Page 3 7 Section 3 Theory of Operation Hardware Block Diagram RAM NIBP i MODULE CLOCK MAIN CPU PROGRAM MEM AUDIO POWER SUPPLY CIRCUIT MAIN PC BOARD EE usi etse INTERNAL PRINTER 507ELC2 only ANALOG OUTPUTS EXT SERIAL PORT Printer Communcate Bus Board Page 3 8 Scholar Ill 507ELC2 Service Manual Criticare Systems Inc Section 3 Theory of Operation Main Board Display Board and SpO Board Circuit Diagram Microprocessor MPU 16 Volt Battery Power Supply System Battery VR1 VR2 VR3 VR4 Charger VR5 VR6 VR7 U4 U17 U33 U26 Q3 Q5 Analog to Sensor Amplifier Digital And Filter Converter U2 U1
72. lutions will damage the cuff Temperatures over 275 F 135 C will damage the cuff Close the Velcro fastener before laundering the cuff Soaking the cuff in dark colored solutions may stain or discolor the cuff Hand laundering as opposed to machine laundering prolongs the life of the cuff Wash the cuff in warm soapy water Rinse the cuff thoroughly After you clean the cuff allow the cuff to air dry and then insert the inflation bag in the cuff ECG Cable You can clean the ECG cable and leads with alcohol Do not immerse the connections Temperature Cable Clean the cable according to hospital protocol for cleaning of reusable equipment cables Typically this protocol consists of the following 1 Disconnect the cable from the monitor and temperature sensor 2 Wipe the cable with a nonabrasive cloth moistened with a mild detergent and warm water or a disinfectant Dry thoroughly 3 Do not use alcohol or solvents to clean the cable 4 Do not allow the cable connectors and contact points to come in contact with liquids 5 Do not fully immerse the cable in liquids 6 Do not autoclave or ETO sterilize the cable Page 4 2 Scholar IIl 507ELC2 Service Manual Criticare Systems Inc Accidental Wetting Criticare Systems Inc Section 4 Cleaning and Disinfecting WARNING A Shock Hazard The monitor is an AC powered device and an immersed monitor presents a danger to anyone who handles the device
73. main battery before you perform any service testing or maintenance procedures Criticare Systems Inc Scholar amp Ill 507ELC2 Service Manual Page 7 1 Section 7 Disassembly Battery Replacement Battery Removal 1 Follow the caution for static sensitive devices on page 7 1 2 Turn the monitor off and disconnect the charger cord from the back of the monitor 3 Turn the unit upside down and place it on the work surface 4 Remove the rubber inserts from the feet by pulling the inserts straight up see Figure 7 1 Battery Removal There is a Phillips head screw beneath each insert Phillips Head Rubber Rubber Screw Insert Insert EI E e mi Philips Head C T Scrow Em Q i Philip ea Screw Z Front dicera L H L Foot Front Foot Battery Cover o OQ S ET Loa rh Ww Figure 7 1 Battery Removal 5 Remove the three Phillips head screws that secure the battery cover to the case 6 Tilt the battery cover up from the front edge use a small screwdriver to gently pry the battery cover open 7 Remove the battery cover from the case by lifting it straight up Page 7 2 Scholar Ill 507ELC2 Service Manual Criticare Systems Inc Battery Installation 1 Section 7 Disassembly CAUTION A In the next step be sure you pull only
74. model number serial number and a brief description of the reason for return Freight policy The customer is responsible for freight charges when equipment is shipped to CSI for service this includes customs charges Loaner service In the U S If it is necessary to provide a loaner system CSI will ship a loaner by overnight courier The loaner system must be returned to CSI at the customer s expense within one week after receipt of the repaired goods If the unit is not returned to CSI within that time the customer will be invoiced for the full purchase price of the equipment Outside the U S No loaners are available from CSI internationally Contact your local CSI representative The following incoming inspection is required whether it is a first time arrival or a return from service Prior to clinical use inspect the instrument for the following 1 The quality inspection seal on the instrument should be unbroken This seal indicates that the instrument has been tested according to manufacturers specifications 2 No physical damage is observed 3 The instrument s battery is to be charged by connecting the instrument to a power outlet for a minimum of 6 hours prior to clinical use 4 When connecting the instrument to a power outlet and then turning the instrument on all displays appear to function correctly and no system errors occur If a discrepancy to these inspection items is observed do not use the instrum
75. ne 3 8 Main Board Display Board and SpO Board Circuit Diagram esssseeeeeeeeeeee 3 9 Blood Pressure Board Circuit Diagram m Block Diagram 5er ERR redeem ene ENTE Be RU erbe ned Lee o raus 3 11 Section 4 Cleaning and Disinfecting Cleaning and Disinfecting Pulse Oximeter Sensors m Blood Pressure uff ees EENS ENEE ENEE deed SEENEN EGG Gable E Temperature Cable Accidental Wetting Section 5 Preventative Maintenance INCOMING Inspection retener etn e ner ee rere ne nr tenere Pe ean 5 1 Maintenance Schedule 25 1 Monitor Safety Testing 5 2 Equipment and Tools tt tti Eed 5 3 Accessory Testing nnne neret rennen rennen enne 5 3 Battery Safety xn Battery Replacement nter teer er ru e tere red Pe aene 5 4 Removing the Battery saissetiae etre tn aee dd iei a eee nnn 5 4 Installing the New Battery inert rrr nennen nnne 5 5 Battery Maintenance nennen rennen rennen trennen trennen 5 5 Long term Storage DIC DE Ee Scholar Ill 507ELC2 Series Service Manual Criticare Systems Inc Criticare Systems Inc Electrical Safety Testing geed Seed ee EES Scholar III Withstanding Voltage Hi Pot Test E Equipment Needed rennen eterne nte tere eene nain HicPot Pertormance iEn a eei a a n e a a e N a a ia EEI le e LP T Functional Testing cir e ce a I v pce cea e ht ree Ee Ed eee Interfa
76. o position inside the monitor chassis Plug the hose from the blood pressure cuff fitting onto the elbow that extends out of the mounting tray See Disconnecting Blood Pressure Cuff Hose at Elbow on page 7 25 Perform the Main Board installation procedure found in Main Board Installation on page 7 7 Slide the top cover down onto the monitor 10 Turn the monitor upside down Install and tighten the four screws that hold the top cover to the monitor 11 Perform the battery installation procedure in Battery Page 7 26 Installation on page 7 3 Scholar IIl 507ELC2 Service Manual Criticare Systems Inc Section 7 Disassembly Aijquiessy Jezeg UO14 et J eunbi4 aueiquisyy pedAsy Jezeg 1uoJJ pieog q31 4 sisse Adeo yuawBbas 7 aiqeo uoqqi 131 PIerus ING aide dalN age j e d v y ods Aejdsig joueg Aejdsiq ajoe da00y oJnjeJedujo pieog 3128euuo2J9ju 9 e3do2es 923 91425 punoJs Page 7 27 Scholar Ill 507ELC2 Service Manual Criticare Systems Inc Section 7 Disassembly Keypad Membrane Replacement Page 7 28 General Keypad Membrane Removal Keypad Membrane Installation If any of the keys on the front of the monitor fail to operate you must replace the membrane that contains the keys The keypad membrane also contains the following LEDs Lights for ALARM SILENCE red and ON OFF Power green and e 7 segment numeric disp
77. om the corners of the Blood Pressure BP Board see Figure 7 8 A plastic spacer is positioned at each screw point between the circuit board and the metal bracket Retain the plastic spacers for board installation Plastic Screw PR1 E GG Blood 8 Pressure J Board Ich NET LT OOOO l l Plastic i Spacer an y on Figure 7 9 Blood Pressure Board Replacement 5 At the rear of the Blood Pressure Board label and disconnect J7 an 8 pin connector Also label and disconnect the plastic tube from PR1 the pressure transducer 6 Lift the blood pressure board out of the monitor chassis Criticare Systems Inc Scholar amp Ill 507ELC2 Service Manual Page 7 15 Section 7 Disassembly Blood Pressure Board Page 7 16 Installation 1 Connect the plastic tube onto pressure transducer PR1 at the rear of the new Blood Pressure Board see Blood Pressure Board Replacement on page 7 15 Connect connector J7 into the rear of the new Blood Pressure Board Place a plastic spacer on each of the four metal mounting brackets Set the new Blood Pressure Board down onto the plastic spacers Install the four plastic screws through the board and the plastic spacers and tighten them Perform the Main Board installation procedure found in Main Board Installation on page 7 7 Slide the top cover down onto the monitor Turn the monitor upside down
78. ompatibility Latex Content Criticare Systems Inc Section 1 Introduction Criticare Systems Inc has quality control practices and procedures in place to review potential hazards as they relate to software The monitor is Year 2001 Compliant and utilizes a two digit year for all date time and leap year calculations This device has been successfully tested to IEC 60601 1 2 specified levels for emissions of and resistance to electromagnetic energy fields External disturbances which exceed these levels may cause operational issues with this device Other devices which are sensitive to a lower level of emissions than those allowed by IEC 60601 1 2 may experience operational issues when used in proximity to this device MAGNETIC FIELDS Use of the monitor in an MRI environment may interfere with MRI image quality Use of MRI may interfere with the monitor RADIO FREQUENCY INTERFERENCE The monitor conforms with IEC 61000 4 3 for radio frequency interference and will operate with negligible adverse effects CONDUCTED TRANSIENTS The monitor conforms with IEC 61000 4 4 and IEC 61000 4 5 for conducted transients and will operate with negligible adverse effects X RAY The monitor will operate with negligible adverse effects in an x ray environment However the monitor should not be placed directly in the x ray beam which could damage the internal electronics of the monitor OTHER INTERFERENCE There is a negligible adverse e
79. onitor vs diagnostic modes lead selection lead off detection and pacer pulse detection are performed in hardware under software control Gain control notch filtering to remove line frequency interference pacer artifact handling noise detection beat detection heart rate calculation and serial communications are performed in software The Criticare NIBP module is an oscillometric continuous ramping inflate mode design with a single lumen hose for both pressurization and sensing The general principles of oscillometric NIBP are well described in Handbook of Blood Pressure Measurement Geddes However the inflate mode design of the Criticare NIBP module distinguishes it somewhat from the systems described in Geddes book The SpO is measured using Criticare s DOX digital oximetry This circuit design is proprietary to Criticare Systems Inc and therefore is not described here The temperature probe produces a resistive change in response to temperature which is inversely related to temperature in an approximately exponential fashion A precision calibration resistor is used auto calibrate the circuitry Linearization and conversion to temperature units is performed in software via table translation The temperature facility is a circuit on the ECG board The TTI respiration circuit uses a transformer to generate a low current high frequency stimulus through the Lead electrodes The resulting voltage variations ref
80. onnectors on page 7 5 16 Label and disconnect the ribbon connector which connects the NIBP assembly to the Main Board at J5 See Main Board and ECG Board Connectors on page 7 5 The Main Board should now be free from the monitor chassis and front bezel Set the front and rear edges on supports that are raised 1 1 2 inches from the storage surface The component side of the Main Board must face up to prevent the printer and printer wires from resting on the storage surface and being damaged 1 Slide the front bezel upward approximately 3 4 inch Place a small wood block beneath the front bezel to hold it in the raised position so you can plug the Main Board into the bezel without hitting the Main Board components on objects inside the monitor chassis 2 Partially turn the Main Board upside down Connect the ribbon connector at J5 with the NIBP assembly Note pin 1 3 Connect the front panel to Main Board connectors J8 and J9 4 Connect the front of the Main Board into the front bezel at connectors J1 J3 and J4 5 Connect connectors J6 analog output and J13 DB 9 connector at the rear of the Main Board 6 Connect both connectors J1 and J2 on the ECG Board at the left front of the monitor 7 Connect the power cable connector at J12 of the Main Board 8 Connect connectors J2 speaker and J11 backlight inverter on the edge of the motherboard near the speaker Install the speaker Scholar amp Ill 507ELC2 Se
81. operation of several execution paths Scholar Ill 507ELC2 Service Manual Page 3 3 Section 3 Theory of Operation External Service Tools Page 3 4 Main Board Software Upgrade NIBP Module Software Upgrade NIBP Module Service Tool REAL TIME CLOCK RTC DRIVER The real time clock RTC circuit is a battery backed source of date and time of day information independent of the microprocessor The RTC driver provides for reading the RTC contents testing date and time integrity updating the RTC and managing the RTC alarm event interrupt In the Scholar III this interrupt is employed as an independent time base check ANALOG OUTPUT DRIVER The analog output is a patient isolated external output signal programmed through a PWM timer to reproduce a selected waveform The functional interface to the analog output update function consists of init_analog_out set_mode_wave and update_analog_wave The PWM hardware is initialized by the init_analog_out routine Analog output signal selection is controlled through the set_mode_wave function The dynamic analog output update is accomplished via the update_analog_wave function called 300 sec from the system timer service ISR which also scales and stores signal data for analog output directly into the wave global array The analog output waveform is reproduced with 100 Hz bandwidth Simulated pacer pulses are omitted from the analog reproduction of the ECG signal Upon a
82. pressed Scholar III 507ELC2 Service Manual Page 5 13 Section 5 Preventative Maintenance Vital Sign Modules Verification ECG Verification 1 Verification that the ECG baseline is centered a To verify the ECG baseline is centered press the UP ARROW key to set up the unit to the X4 scale b Press the SETUP key to set up the unit for the Lead II configuration c Press the UP ARROW key to set up the unit for 1mv ECG d Press the SETUP key and set up the unit for input FILTER OFF e Verify that the ECG baseline is centered with an ECG signal present 4 pixels See Figure 5 3 ECG Baseline I EJ JL s ds Figure 5 3 ECG Baseline 2 Check the DB 9 connector for telemetry compatibility Verify 5V is present at pin 4 of the DB 9 connector 3 Connect an ECG patient cable to the ECG jack on the Scholar IIl patient monitor Connect an ECG simulator to the snap ends of the patient cable as follows RED LL WHITE RA BLACK LA Set the ECG output to 60 BPM then set the RESPIRATION RATE to 60 The HEART RATE BPM 7 segment displays indicate the setting of the pulse setting of the simulator The HEART RATE should be 2 counts of what the ECG simulator is set for The SpO2 7 segment displays flashes a bar across each of the numbers The RESPIRATION RATE RESP displays on the upper right corner of the LCD with a numeric value 4 The Scholar III patient monitor can use 3 different lead configura
83. r to depress the latch on the female terminal end and pull gently on the wire to remove it from the J7 connector Be sure to note the positions of the red and black wires in the connector before removing them You must return the wires to the original positions when you reassemble Remove the two screws that hold the pressure switch in place Label and remove the hose from the pressure switch Remove the pressure switch from the monitor Plug the hose onto the plastic nipple on the pressure switch Set the pressure switch down into position in the monitor Apply Loctite 425 CSI Cat No 41157B001 to the switch retaining screws Slide the screws through the switch and thread them into the mounting tray Slide the terminal end of each switch wire into the J7 connector until the terminal latch locks into its slot see Wire Position and Removal from J7 Connector on page 7 18 Be certain that the switch wires are in their original positions in the J7 connector Perform the Blood Pressure Board installation procedure found in Blood Pressure Board Installation on page 7 16 Perform the Main Board installation procedure found in Main Board Installation on page 7 7 Slide the top cover down onto the monitor Scholar amp IIl 507ELC2 Service Manual Criticare Systems Inc Section 7 Disassembly 9 Turn the monitor upside down Install and tighten the four screws that hold the top co
84. r install the roll previously removed or install a new roll 50 mm paper CSI cat no 1121 New rolls will have a short length of hold down tape that must be removed from the fresh roll Ensure that the end of the paper is cut straight Use scissors if necessary to square up the end Torn paper does not feed correctly 14 Ensure the paper release lever on the side of the recorder housing is in the closed down position 15 Ensure that the paper dispenses from the bottom of the roll as shown below See Figure 7 8 Installing Paper Roll Figure 7 8 Installing Paper Roll 16 Insert the end of the paper squarely beneath the roller of the recorder If properly inserted the recorder should begin to Auto Feed after about one second If this does not occur then the paper may be manually started a Raise the paper release lever inserting the paper beneath the roller b Lower the paper release lever c Press the PAPER FEED key located on top of the recorder housing 17 Center the paper on the roller if necessary by using the paper release lever and repositioning the paper 18 Feed the paper through the slot of the paper door and close the paper door over the new roll of paper 19 Ensure that the paper door latches shut Page 7 12 Scholar III 507ELC2 Service Manual Criticare Systems Inc Loudspeaker Replacement Loudspeaker Removal Loudspeaker Installation Criticare Systems Inc 1 i Section 7
85. r one continuous hour with the power turned off To expose the module to ambient air it must either be outside of the monitor or you must remove the top of the monitor Bring the NIBP module to mid range operating temperature Attach a line cord verify that the ON OFF Power LED on the front panel is lit and turn power on to the NIBP module Leave power applied with the module still exposed to ambient air at temperature between 19 degrees and 24 degrees C for not less than fifteen minutes nor more than one hour before proceeding with calibration To expose the module to ambient air it must either be outside of the monitor or you must remove the top of the monitor Replace the top of the monitor after you complete the calibration Criticare Systems Inc Scholar IIl 507ELC2 Service Manual Page 6 5 Section 6 Service Testing and Calibration NIBP Module Setup Equipment Required PC computer configured for use with CSI Service Software 507EL serial download cable Digital manometer 0 01 resolution or better 700cc dummy cuff Plastic tuning tool ESD protected workbench Dynatech Nevada NIBP Analyzer Connect a serial download cable from the PC serial port to the Scholar III INTERFACE connection Set the DIN download cable to NIBP USER Open the service tool on the computer Select Start gt Programs gt CSI NIBP Service gt NIBPSvc Close the disclaimer dialogue box 3 Click on Connection and select Options
86. ratories ETL Mark Not For Use with Flammable Anesthetic Gasses Do not dispose of in municipal waste Wheeled bin symbol indicates separate collection for electrical and electronic equipment WEEE Directive 2002 96 EEC Type CF Equipment defib proof Shock Hazard Technical Support Phone Number Non Invasive Blood Pressure Temperature Monitoring Not a Sensor Connection Definitions for Warning and Caution symbols Designates a possible dangerous situation WARNING A Non observance may lead to death or the most severe injuries Designates a possible dangerous situation A CAUTION A S Non observance may lead to minor injuries or damage to the product Criticare Systems Inc Scholar Ill 507ELC2 Service Manual Page 1 11 Section 1 Introduction Safety Leakage Current Voltage Fluctuations Page 1 12 WARNING N Read this manual entirely before attempting clinical use of the monitor A possible explosion hazard exists Do not use the monitor in the presence of flammable anesthetics Cables cords and leadwires may present a risk of entanglement or strangulation Verify safe and proper positioning of these items after patient application Unapproved modifications to the monitor may cause unexpected results and present a hazard to the patient Risk of electrical shock Do not remove cover Refer servicing to qualified personnel U S Federal law restricts this device to sale by or on the o
87. rder of a physician NCAUTION A Use the monitor only with recommended accessories Use of unapproved accessories may cause inaccurate readings Equipment accuracy may be affected at extreme temperatures Do not store equipment at extreme temperature Temperatures exceeding specified storage temperatures could damage the system Do not press on the keys with surgical instruments or other tools Sharp or hard objects could damage the keys Use only your fingertips to press on the keys Changes or modifications not expressly approved by Criticare Systems Inc may void the user s authority to operate the equipment and may also void the warranty The monitor complies with leakage current limits required by medical safety standards for patient connected devices Conforms to EN 60601 1 A hazard caused by the summation of leakage currents is possible when several pieces of equipment are interconnected When operated in the line voltage range specified in this manual any fluctuation will have a negligible effect Very low line voltage will cause the monitor to revert to battery power Very high line voltage may cause damage to the charger circuits The monitor is designed with circuitry that will turn the unit off before spurious readings can be caused by a low battery condition Scholar IIl 507ELC2 Service Manual Criticare Systems Inc Software Error Related Hazard Mediation Potential Interference Use of Anesthetics Bioc
88. rvice Manual Page 7 7 Section 7 Disassembly 9 Remove the wood block from beneath the bezel Slide the bezel down into the chassis 10 Slide the top cover down onto the monitor 11 Turn the monitor upside down Install and tighten the four Phillips screws that hold the top cover to the monitor 12 Perform the battery installation procedure found at Battery Installation on page 7 3 13 On monitors with a printer start the end of the paper roll into the printer The paper must feed out from the bottom of the roll because the printer uses a heat activation method of printing and only one side of the printer paper contains a heat sensitive coating Slide the paper as far as it can go into the printer Press the PAPER FEED key to thread the paper through the printer see Installing Paper Roll on page 7 12 Page 7 8 Scholar amp IIl 507ELC2 Service Manual Criticare Systems Inc Section 7 Disassembly Recorder Printer It is not necessary to remove the top cover of the ELC2 to replace the Replacement recorder printer NOTE This applies only to the 507ELC2 models Recorder Printer Removal 1 Follow the caution for static sensitive devices in General Caution on page 7 1 2 Turn the monitor off Unplug the AC adapter charger from the AC wall receptacle Then unscrew the adapter cord and remove it from the back of the monitor 3 Turn the monitor upside down and remove only the screw located towards the rear of th
89. s discomfort than with monitors which measure NIBP during cuff deflation Description of NIBP The NIBP cuff begins to inflate at the beginning of the NIBP Measurement measurement cycle As the cuff pressure approaches the diastolic pressure of the patient the cuff pressure waveform begins to indicate the pulse waveform The cuff pressure at this point is equal to the patient s diastolic pressure which is stored by the monitor As cuff pressure continues to increase the pulse waveform as measured from BP cuff pressure fluctuation becomes stronger reaching its maximum at the patient s mean arterial pressure i e when cuff pressure mean BP The monitor stores this value as mean pressure As cuff pressure increases further it approaches the patient s systolic pressure and the cuffs pulse waveform decreases in amplitude The cuff pulse waveform disappears at the point where cuff pressure is equal to the patient s systolic pressure When the monitor determines that the cuff waveform has decreased to zero amplitude it stores the cuff pressure value as the systolic pressure and releases the pressure from the cuff This typically occurs at about 10 mmHg over the patient s systolic pressure The cuff then rapidly deflates NIBP Clinical Testing This device was clinically tested per the requirements of AAMI SP 10 and Accuracy and is compliant with EN1060 The NIBP module as installed in the 507ELC2 monitor has been tested to meet th
90. screw the adapter cord and remove it from the back of the monitor 3 One of the four Phillips screws that retains the monitor top cover is located beneath the battery see Figure 7 2 Turn the monitor upside down Perform the battery removal procedure at Battery Removal on page 7 2 Top Cover ul Screw LU 1 M Top Cover Screw Top Cover mr eg 9j Cover C mti Screw Figure 7 2 Top Cover Removal 4 Remove the Phillips screw located beneath the battery 5 Remove the other three Phillips screws that are in wells at the corners of the monitor 6 Turn the monitor right side up 7 507ELC2 monitors only a The recorder printer module of the 507ELC2 is secured in place by one of the top cover screws that were just removed The module should now be somewhat loose Detach the module in order to disconnect its cable from the Main Board b Open the paper door by pressing in on the tab on the rear of the paper door while lifting the door up and forward It is not necessary to remove the roll of paper Page 7 4 Scholar III 507ELC2 Service Manual Criticare Systems Inc Section 7 Disassembly c Using a long flat blade screwdriver insert the blade into the hole where the tab of the paper door was resting see Figure 7 3 Recorder Module Removal Press
91. securely connected to charger AC outlet is not live Fuses F1 and or F2 on Main Board are blown J12 on Main Board is disconnected J1 J3 J4 and or J11 on Main Board are disconnected or loose Connect AC charger Connect charger cord securely to rear panel connector Connect cord to charger Connect the power cord to a live outlet Replace fuses Connect J12 Connect J1 J3 J4 and or J11 Leaks in NIBP system NIBP cuff connector is loose at front panel Defective cuff Defective hose Tighten connector Replace cuff Replace hose NIBP not functioning NIBP module is not communicating with Main Board Power unit off then on while watching the display If the screen is blank for ten sec onds after the logo displays the NIBP mod ule is not communicating with the Main Board Check for the following A good connection at J8 on the NIBP Board Flash PROM U27 is completely seated in socket Good connection at each end of ribbon cable between Main Board J5 and NIBP module J8 No sound from speaker J2 on Main Board is disconnected or loose Speaker wire broken at speaker terminals Connect J2 Check speaker wires Display backlight doesn t work J11 on Main Board is disconnected or loose Connect J11 Display is blank or not readable Contrast is misadjusted J1 J3 and or J4 on Main Board are disconnected or loose Adjust display
92. seline PASS Perform Analog Output Calibration PASS Verify 5V at DB 9 pin 4 PASS Verify HR and RR Readings PASS Verify Lead ECG Waveform PASS Verify Lead Off Message White Lead PASS Reconnect White Lead observe ECG waveform PASS Verify Lead Off Message Black Lead PASS Reconnect Black Lead observe ECG waveform PASS Verify Lead II ECG waveform PASS Verify Lead III ECG waveform PASS Verify ECG Lost PASS Oximeter Functionality Verify NO Sensor PASS Verify SpOs Readings PASS Verify SpO Lost PASS Verify High Ambient Condition PASS Perform Computer SPO Simulator Test PASS NIBP Functionality Verify 1 75 Hour Trend PASS Perform the Adult amp Neonate Simulator Test PASS Temperature Functionality Verify Temperature Limits PASS Printer Testing 507ELC2 only PRINT key PASS PAPER FEED key PASS ECG Waveform printout PASS DATE ON TIME CERTIFICATION THAT THE UNIT IS CALIBRATED AND FUNCTIONING PROPERLY NAME DATE This checklist may be copied as needed to record field testing Page 5 20 Scholar amp IIl 507ELC2 Service Manual Criticare Systems Inc Section 6 Service Testing and Calibration Field Service Testing Safety A Criticare Systems Inc A WARNING N Service testing procedures require working with exposed electrical circuits and should only be attempted by experienced electrical or biomedical technicians When a moni
93. serviced monitor for 24 hours less 4 hours for shipping before you perform the tests listed above and place the monitor back into service Repaired modules could require more extensive testing Always follow ESD precautions when performing a procedure discussed in this section Ate WARNING N Because test procedures require working with exposed electrical circuits only experienced electrical or biomedical technicians should perform the procedures After a monitor is altered through repair or hardware adjustment you must fully test it before use Page 5 2 Scholar amp IIl 507ELC2 Service Manual Criticare Systems Inc Equipment and Tools Accessory Testing Criticare Systems Inc Section 5 Preventative Maintenance The following procedures assume that the technician has an ESD safe workbench a set of electronic hand tools and a digital multimeter with a 10 amp setting At the beginning of each test special equipment can be listed A variety of customized cables clips and test fixtures are also needed to complete the tests For more information contact the CSI Service Department Check patient cables e g temperature cables printer cables monthly for damage loose wires connections loose connectors cracked housing etc Check the electrical safety of the charger as part of the monitor safety testing Check the cuffs for leakage as part of the NIBP verification Scholar IIl 507ELC2 Service Manu
94. stall and tighten the four screws that hold the top cover to the monitor 14 Perform the battery installation procedure in Battery Criticare Systems Inc Installation on page 7 3 Scholar amp Ill 507ELC2 Service Manual Page 7 19 Section 7 Disassembly Solenoid Valve Replacement General Solenoid Valve Removal Page 7 20 Two solenoid valves in the air system control the blood pressure cuff inflation and deflation See Figure 7 12 Solenoid Valve and Pressure Switch Installation The same installation and removal procedures can be used for both valves O o N I J7 Connector H Pressure Screw Cp Figure 7 12 Solenoid Valve and Pressure Switch Installation Follow the caution for static sensitive devices in General Caution on page 7 1 Perform the battery removal procedure at Battery Removal on page 7 2 Perform the Main Board removal procedure found in Main Board Removal on page 7 4 Perform the Blood Pressure Board removal procedure found in Blood Pressure Board Removal on page 7 15 Label and disconnect the plastic tubes from the valve To remove the valve from the monitor you must remove the two wires from the J7 connector that supply the valve Free the wires from the harness that contains them by clipping the wire ties that
95. sted by Date Test PassFail Electrical Safety Testing Withstanding Voltage Hi Pot Test Mains Input to Power Ground Test Hi Pot 1500 V to ground Hi Pot HOT and NEUTRAL to ground with 1500VAC 2mA 1 second Hi Pot BNC to ground with 1500VAC 2mA 1 second Hi Pot CHARGER 507E EL HI POT SETUP to ECG with 5700VDC 2mA 1 second switch to DC Hi Pot CHARGER 507E EL HI POT SETUP to ECG with 5700VDC 2mA 1 second Hi Pot ECG to DB 9 with 4000VAC 2mA 1 second switch to AC Leakage Leakage Open ground Mode Switch Reading Reverse position polarity Switch Open Neutral Normal lt 90uA Open Neutral Reverse lt 90uA Leakage Open Ground lt 50uA Polarity Reverse lt 50uA All Leads Normal lt 50uA Open Neutral lt 50uA Open Ground lt 50uA Open Neutral lt 50uA Open Neutral lt 50uA RA LA RA RL LA RL Isolation Test Leakage Temperature 20uA Criticare Systems Inc Scholar amp Ill 507ELC2 Service Manual Page 5 19 Section 5 Preventative Maintenance Functional Testing Interface Inspection PASS Manual Controls Check PASS Shut Off Verify Unit Shut down 10 9 0 2VDC PASS Speaker Perform the Speaker Test PASS LED Functionality Perform LED DISPLAY Test PASS Time and Date Set date and time in the Setup screen PASS Alarms Testing Alarm Volume PASS Alarm LEDs Verify Operation of all membrane switch key PASS ECG Functionality Verify ECG Ba
96. tems Inc Respiration Source Rate Range Resolution Accuracy NIBP Technique Measurement Time Automatic Measurement Cycles Inflation Pressure Range Resolution Accuracy STAT mode Temperature Range Accuracy Probe Type Alarms Characteristics Indication Levels Alarm Modes Volume Silence Trend Reports Types Trend memory Tabular Intervals Data Types Recorder 507ELC2 only Recorder Type Data Formats Paper Speed Criticare Systems Inc Scholar Ill 507ELC2 Service Manual Section 1 Introduction Impedance ECG 9 to 150 breaths minute 1 breath minute gt of 1 or 1 breath minute Oscillometric measure upon inflation lt 40 seconds average standard adult cuff 1 2 3 5 10 15 30 45 60 min 2 4 hrs Adult 0 to 300 mmHg Neonatal 0 to 150 mmHg 1 mmHg 2 mmHg or 2 of reading 5 min of consecutive readings 68 to 113 F 20 to 45 C 0 1 C YS1 400 EN 475 Adjustable Audible Visual High Medium Low Informational Adult Neonate High and low limit settings for each mode User Adjustable 1 10 Yes 2 minutes or permanent Tabular 24 hours 1 2 5 10 15 30 60 minutes 2 4 hours HR SpO Temp Resp NIBP Systolic Diastolic Mean Internal thermal line printer Single or dual waveform Tabular 25mm sec fixed Tabular printing 25 or 50 mm sec selectable Waveform recording fixed length or continuous Page 1 9
97. the blade firmly between the module housing retaining tab and the cutout in the top cover of the 507ELC2 At the same time gently lift up on the module housing The recorder printer module should dislodge from the top cover at this time Close the paper door to prevent the roll of paper from escaping NOTE Do not remove the recorder printer module before disconnecting the flat flex cable ort screwdriver in this slot Figure 7 3 Recorder Module Removal NOTE The left and right sides of the monitor are the same as the left and right sides of the viewer when you face the front panel of the monitor Inverter Housing J4 Ji J8 J9 J3 Figure 7 4 Main Board and ECG Board Connectors Criticare Systems Inc Scholar amp Ill 507ELC2 Service Manual Page 7 5 Section 7 Disassembly CAUTION A J17 is somewhat delicate The locking mechanism of J17 is not removable from the body of the connector Should it detach it cannot be repaired 8 507ELC2 monitors only J17 resides on the Main Board directly beneath the recorder printer module Using either the fingers or a small flat blade screwdriver gently open J17 by pushing pulling the two ears of J17 towards the front of the 507ELC2 until it stops The flat flex cable from the recorder printer module can now easily be removed from J17 Place the recorder printer module aside on an ESD protective surface 9 Begin to slide the monitor cover upward to remove the co
98. the temperature probe The thermistor can sense change in body temperature by changing electrical resistance Unusual fast artificial variations in temperature readings may occur with accompanying applications of an electrocautery system Electrical leakage current of the cable when used with the monitor and sensor comply with IEC 601 1 EN 60601 1 The monitor is compatible with any YSI 400 series temperature probe Scholar amp Ill 507ELC2 Service Manual Page 1 7 Section 1 Introduction Specifications ECG Connector Lead Selection Frequency Response Sweep Speed Electrosurgery Protection Defibrillator Protection Pacer Rejection SpO Range Resolution Accuracy Indications Method Modes Operation Sensor Wavelength Sensor Power Heart Rate Source Range Accuracy Pulse Tone Page 1 8 Scholar Ill 507ELC2 Service Manual Standard AAMI 3 Lead 1 Il Ill Filter Off 0 05 100 Hz Filter On 0 50 40 Hz 25 50 mm sec Yes Yes Yes 1 99 1 70 99 range 2 50 69 range 3 lt 50 unspecified Statistical represents one st dev 66 of clinical samples Plethysmograph Numerical Audible pulse tone pitch varies with SpO Dual wavelength LED Adult Neonate Continuous Use 660nm 905nm 80mW Smart Switching S electable ECG primary P leth NIBP 30 300 bpm ECG Pleth 30 240 bpm NIBP 1 bpm or 1 Selectable On Off Criticare Sys
99. tions for the ECG Press the SETUP key until the LEAD selection is highlighted Press the UP ARROW key to cycle through LEAD I Il or IIl The lead configuration displays on the top of the display Page 5 14 Scholar amp IIl 507ELC2 Service Manual Criticare Systems Inc Section 5 Preventative Maintenance 5 With the Scholar IIl patient monitor set up for LEAD I verify the ECG waveform See Figure 5 4 Lead ECG Waveform e pec wp d E E Figure 5 4 Lead ECG Waveform 6 Disconnect the white lead from the simulator The waveform should disappear and the base line should return to the middle of the display The HEART RATE should decay and a RA LEAD OFF message appears 7 Reconnect the white lead and the waveform should return to normal with a normal heart rate 8 Disconnect the black lead from the simulator The waveform should disappear and the base line should return to the middle of the display The HEART RATE should decay and the LA LEAD OFF message appears 9 Reconnect the black lead and the waveform should return to normal 10 Disconnect the red lead from the simulator The waveform should disappear and the base line should return to the middle of the display The HEART RATE should decay and a LEADS OFF message appears 11 Reconnect the red lead and the waveform should return to normal 12 With the Scholar III patient monitor set up for LEAD II verify the ECG waveform See Figure 5 5 Lead II ECG Wa
100. to CASE LEAKAGE GROUND CONDUCTOR Connect the AC cord from the Dynatech to the AC input of the Scholar III patient monitor Turn the Scholar III patient monitor on for the remaining leakage tests With the POLARITY switch in the NORMAL position monitor the readout for less than 50 uA 4 Change the POLARITY switch to the REVERSE position and accept a reading of less than 50 uA 5 With the POLARITY switch in the NORMAL position Press the OPEN NEUTRAL switch and accept a reading of less than 90 uA 6 Change the POLARITY switch to the REVERSE position and press the OPEN NEUTRAL switch and accept less than 90 uA 7 Press the OPEN GROUND button Accept a reading of less than 50 uA 8 Set the POLARITY switch to the REVERSE position Accept a reading of less than 50 LA 9 Connect the Dynatech to the Scholar IIl patient monitor using the 3 lead ECG cable Set the MODE switch to ECG to GND For the rest of the leakage tests ensure that the leads are dressed away from any ground planes the AC power cord and the chassis Set the MODE switch to ECG TO GND Set the LEADS switch to ALL Set the POLARITY switch to NORMAL Accept a reading of less than 50 uA 10 Press the OPEN NEUTRAL button Accept a reading of less than 50uA The green AC light turns off 11 Press the OPEN GROUND button Accept a reading of less than 50
101. tor is altered through repair or hardware adjustment it should be fully tested before use NCAUTION A Always follow ESD precautions when performing any procedure discussed in this section The manufacturer recommends that a serviced monitor be allowed to run for 24 hours before the monitor is placed back into operation Modules and PCBs that have been repaired may require more extensive testing than what is described in this manual The pre assembly testing of printed circuit boards PCBs is not covered in this manual Disassembly of surface mounted components on PCBs is not recommended Tests provided here are only for the identification of damaged or degraded PCBs Scholar III 507ELC2 Service Manual Page 6 1 Section 6 Service Testing and Calibration Field Service Test Any time you open a monitor s case you must perform electrical Matrix safety tests before you return the monitor to operation If you service the monitor you should also perform the functional tests You should perform additional tests that are specific to modules and assemblies when you service adjust calibrate or disassemble assemblies See the following table Field Service Testing Required Test wv Recommended Test Printer Testing 507ELC2 only NIBP Verification Temperature Verification SpO2 Performance Test NIBP Module Calibration Temperature Check Main Board Testing SPO Verification S Withstanding Voltage Hipot ECG
102. unting tray to its support bracket Scholar amp Ill 507ELC2 Service Manual Page 7 17 Section 7 Disassembly 7 Lift slightly the open end of the mounting tray until it clears the locking tab on the support bracket At the same time slide the tray toward the locking tab until the tray pulls free of the two other tabs that hold the tray to the support bracket Lift the tray out of the monitor 8 Cut the two wire ties that hold the air pump to the mounting tray 9 Label and disconnect the outlet hose from the plastic nipple in the center of the air pump 10 The two wires that supply the air pump are plugged into the J7 connector If the pump is being replaced the two wires must be removed from this connector see Figure 7 10 To free the pump wires first remove the wire tie from the harness that contains them 11 Use a thin object with a fine point e g a very small screwdriver to depress the latch on the female terminal end while pulling gently on the wire to remove it from the J7 connector Terminal J7 Latch NI ne im lm lm im m im m iml Purple Air Pump Brown Pressure Switch Yellow Air Pump E Green n Pressure Switch UR Black Red 3 Way Valve 2 Way AN Black 2 Way Valve Red 3 Way Valve Wire Figure 7 11 Wire Position and Removal from J7 Connector Page 7 18 Scholar III 507ELC2 Service Manual Criticare Systems Inc
103. uter CSI tool 1331 For CSI in house use only Scholar IIl 507ELC2 Service Manual Page 6 3 Section 6 Service Testing and Calibration Plug Into Insulation Removed Battery Ground Positive Battery Voltage Rear View of Connector Half That Plugs Into Board HH Battery E CET Positive Ground Battery Wire Voltage Figure 6 1 Power Test Cable Black Hot Green Yellow Ground White Neutral AC Test Cord Figure 6 2 AC Input Test Connector Page 6 4 Scholar III 507ELC2 Service Manual Criticare Systems Inc Section 6 Service Testing and Calibration NIBP Calibration NOTE The NIBP Functionality test is intended for CSI in house use only Before you proceed any further into the final test of the Scholar Ill patient monitor you must meet the following conditionst Pressure calibration is to be performed ONLY under the temperature conditions outlined below Failure to do so may result in pressure calibration errors After calibration the calibration reading available on the service screen should remain in the range of x0 5mmHg if the monitor has been in the operating temperature range for at least two hours Ensure that the temperature of the NIBP module matches ambient air temperature defined to be between 19 degrees and 24 degrees C If power has been applied to the monitor within the last two hours expose the module to ambient air fo
104. ve gt E O 2 a Q o a Stanley gt DC gt as bd Ba l Criticare Systems Inc Scholar amp Ill 507ELC2 Service Manual Page 3 11 Section 4 Cleaning and Disinfecting Cleaning and Disinfecting Pulse Oximeter Sensors Blood Pressure Cuffs Criticare Systems Inc WARNING N Shock Hazard Turn the power off and disconnect the AC power cable before cleaning the monitor and sensor Shock Hazard Never immerse the monitor The monitor has an internal power source that is active when the unit is unplugged Do not use abrasive cleaners on the monitor or on any sensors or probes Abrasive cleaners can damage the monitor sensors and probes The exterior surface of the monitor except for the display screen may be wiped clean with alcohol and dried with a soft dry cloth It is best to use a cotton cloth to clean the monitor Paper towels or tissues can scratch the surface of the display Do not use full strength alcohol on the display screen Repeated use of strong cleaners can damage the screen Clean the display window by wiping it with a clean soft lint free cloth sprayed with common glass cleaner Do not spray glass cleaner directly on the display NCAUTION A Do not immerse any Criticare pulse oximeter sensor connector in any liquid Doing so may damage the connector You can wipe the SpOz sensor clean with alcohol To disinfect the SpO sensor place the finger clip and cable in a
105. veform ddp ecd os Figure 5 5 Lead Il ECG Waveform 13 With the Scholar IIl patient monitor set up for LEAD III verify the ECG waveform See Figure 5 6 Lead III ECG Waveform III f f f Figure 5 6 Lead Ill ECG Waveform 14 With the Scholar IIl patient monitor set up in LEAD II with a stable waveform and heart rate turn the simulator off In less than 10 seconds the ECG LOST alarm should sound Criticare Systems Inc Scholar amp Ill 507ELC2 Service Manual Page 5 15 Section 5 Preventative Maintenance Page 5 16 Oximeter SpO Verification 15 Press the TREND key and review the Trend screen Verify that 1 the Trend screen is holding data Power down the unit Power up the unit and press the TREND key and review the trend data The unit should retain trend data Observe the data that is stored from the previous tests With the unit powered up and with no sensor connected to the receptacle the message NO SENSOR displays at the bottom of the Scholar III patient monitor display Connect the Cat 511 Finger Sensor to the sensor receptacle and position it on a finger Within 15 seconds valid and stable O saturation and pulse rate readings display on the Scholar III LED display and within the SpOs waveform box and Rate parameter box on the LCD The waveform box also displays a characteristic plethysmograph waveform without noise oscillation or other distortion or artifacts Saturation and pulse
106. ver from the chassis It may be necessary to use a screwdriver to gently pry upward on the right and left front edges of the cover 10 Slide the front bezel upward approximately 3 4 inch Place a small wood block beneath the front bezel to hold it in the raised position so you can unplug the Main Board from the bezel without hitting the Main Board components on objects inside the monitor chassis Figure 7 5 Scholar Ill Open Main Board Exposed Page 7 6 Scholar III 507ELC2 Service Manual Criticare Systems Inc Main Board Installation Criticare Systems Inc Section 7 Disassembly 11 Label and disconnect the ECG connector J1 and the temperature connector J2 from the ECG Board see Main Board and ECG Board Connectors on page 7 5 12 Label and disconnect connectors J8 and J9 front panel from the Main Board at the left front of the monitor see Main Board and ECG Board Connectors on page 7 5 13 On monitors with a recorder label and disconnect J7 and the connector to the remote battery from the Main Board 14 Label and disconnect connectors J2 speaker and J11 backlight inverter from the Main Board Remove the speaker 15 Support the Main Board at the front and at the rear Slide the Main Board backward and away from the front bezel Label and disconnect connectors J1 J3 and J4 These are located at the front of the Main Board and are connected to the Interconnection Board See Main Board and ECG Board C
107. ver to the monitor 10 Perform the battery installation procedure in Battery Installation on page 7 3 Criticare Systems Inc Scholar amp Ill 507ELC2 Service Manual Page 7 23 Section 7 Disassembly Display Interface Board and 7 segment LED Board Replacement Front Bezel Removal 1 Follow the caution for static sensitive devices in General Caution on page 7 1 2 Perform the procedure in Battery Replacement on page 7 2 3 Perform the Main Board removal procedure in Main Board Replacement on page 7 4 4 Disconnect the grounding connector lead to the front bezel assembly 5 Unplug at the elbow the hose that runs to the Quick Connect fitting for the blood pressure cuff on the front bezel see Figure 7 11 6 Disconnect the temperature cable the ECG cable the SpO2 cable and the backlight cable Mark each cable so that it can later be properly reconnected 7 Remove the loudspeaker from the monitor chassis 8 Remove the four Phillips screws that hold the bezel to the chassis two at the top and two at the bottom See Figure 7 13 Remove the Front Bezel Bottom View Top View Remove the four Screws Om e Oo SET L t mmm Lo JL Below battery door Figure 7 13 Remove
108. ystems Inc Warranty Workmanship amp Materials Exemptions Safety Reliability amp Performance In Case of Emergency Contact T Criticare Systems Inc Criticare Systems Inc CSI warranties new equipment to be free from defects in workmanship and materials for a period of one 1 year from date of shipment under normal use and service The 940 Series Multi Site Sensor and the 644 O Sensor carry a six month warranty CSI s obligation under this warranty is limited to repairing or replacing at CSI s option any part which upon CSI s examination proves defective EXCEPT AS DESCRIBED IN THE PARAGRAPH ABOVE CSI MAKES NO WARRANTIES EXPRESS OR IMPLIED INCLUDING ANY WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE CSI s obligation or liability under this warranty does not include any transportation or other charges or liability for direct indirect or consequential damages or delay resulting from the improper use or application of the product or the substitution upon it of parts or accessories not approved by CSI or repair by anyone other than a CSI authorized representative This warranty shall not extend to any instrument which has been subjected to misuse negligence or accident any instrument from which CSI s original serial number tag or product identification markings have been altered or removed or any product of any other manufacturer Criticare Systems Inc is not responsible for the

Scholar® III Model 507ELC2 Service Manual

Contents

Download Pdf Manuals

Related Search

Related Contents

Scholar&reg; III Model 507ELC2 Service Manual

Contents

Download Pdf Manuals

Related Search

Related Contents

Scholar® III Model 507ELC2 Service Manual