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NPB-290 Service Manual - Frank`s Hospital Workshop

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2. 1 2 1 234 5 6 7 8 9 BE NELLCOR PURITAN BENNETT NPB 290 UN a SpO2 in eS DA A Te MEE e wea w w 16 15 14 13 12 1 10 1 SpO2 Sensor Port 9 Alarm Silence Button 2 Power On Off Button 10 Adjust Up Button 3 Low Battery Indicator 11 Adjust Down Button 4 AC Power Indicator 12 Pulse Search Indicator 5 SpO2 Display 13 Motion Indicator 6 Pulse Amplitude Indicator 14 Lower Alarm Limit Button 7 Pulse Rate Display 15 Upper Alarm Limit Button 8 Alarm Silence Indicator 16 Speaker Figure 1 1 NPB 290 Front Panel 1 1 Section 1 Introduction 5 4 1 Equipotential Terminal 4 Fuse Drawer 2 AC Connector 5 Supply Voltage Selector Switch 3 Data Port Figure 1 2 NPB 290 Rear Panel 1 3 RELATED DOCUMENTS To perform test and troubleshooting procedures and to understand the principles of operation and circuit analysis sections of this manual you must know how to operate the monitor Refer to the NPB 290 operator s manual To understand the various Nellcor sensors that work with the monitor refer to directions for use for individual sensors SECTION 2 ROUTINE MAINTENANCE 2 1 Cleaning 2 2 Periodic Safety and Functional Checks 2 3 Battery 2 1 CLEANING Caution Do not immerse the NPB 290 or its accessories in liquid or clean with caustic or abrasive cleaners Do not spray or pour any liquid
3. NFB gp KZ cr2 Friess e MBRS130 onos 1 1113 04 HIGH CURRENT c32 nae TPS 10V L 10U o 16v E 1116 VCC RAW 10V Es AAA H U4 RESETL 9 E 99 CLK 312KHZ 1o 74HCOOS MBRS130 SH9 CONTRAST g P W 5v CR4 121 o e i 2 RAW 10V MBRS130 SH9 CONTRAST g RAW 10V CLK 156KHZ V C vcc CPO CPO CLK 312KHZ CLK 156KHZ CP1 CP1 RST RST 74HC4520S Figure 11 5 Front End Power Supply Schematic Diagram 035350 11 15 035350 CLK 156KHZ D SIPSOP_EN R169 1 00K 1134 ole C79 330P m 5OV NW AAN 12 U14 74HC14S 34 US cso LL 330P m 50v U14 74HC14S 1141 i U14 VDD 74HC14S 7 we la d 5 gt 3 4 ME MBRS130 CRa U49 LT1129CST 5 Q6 SI9936 COILCRAFT Q4470 B 2 y I MBRS130 IN ouT 3 GND1 GND L C19 Z5U C46 47U zu T 10v ys 74HC1OS 74HC10S 1140 U14 74HC14S TX485_EN ITX485_EN NC RELAY
4. RE ER RES GR u 9 1 NEE IR 9 1 9 2 Electrical ici E e 9 1 9 3 Physical Characteristics A 9 1 94 Environmental niae te eb rdc eRE sheet 9 1 GE WEE EEN 9 2 9 6 Factory Default Settings c nh emn 9 2 9 7 tel LEE 9 2 Section 10 Data Port Interface Protocol 10 1 10 1 Introduction uu 016612200004 eel ferte edes 10 1 10 2 Enabling the Data bot 10 1 10 3 Connecting to the Data Port HS HH H 10 2 10 4 Real Time Printout I RA Re Ee ee ee ee kg 10 3 10 5 N rse alli 2 1 oes o re patan tie Dent ten 10 6 10 6 Analog QutIput u uu u elec dc 10 7 10 7 Interactive Mode eedem Guau 10 7 Section 11 Technical Supplement ese ER EER acc em ng 11 1 11 1 unge Tele en EE 11 1 11 2 Oximetry Overview HT Tnhh 11 1 TES ee E IK 11 2 11 4 Functional Overview I emm 11 2 WS HAC ANPUL Ed cies anat tete eee Mu ette 11 3 11 6 Power Supply PCB Theory Of Operation 11 3 EE E o eoe EE ronem aH HT HE 11 4 11 8 User Interface PCB sess 11 5 11 9 Front Panel Display PCB and Controls 11 8 11 10 Schematic Diagrams u HH HH HH 11 9 Section 12 TT E 12 1 LIST OF FIGURES Figure 1 1 Figure 1 2 Figure 3 1 Figure 3 2 F
5. 11 9 Figure 11 16 Display PCB Schematic Diagram 11 9 Figure 11 17 Display PCB Parts Locator Diagram sees ees ee ee ee ee 11 9 Table of Contents LIST OF TABLES vi Table 3 1 Dynamic Operating Range nh 3 8 Table 3 2 Earth Leakage Current Limite 3 11 Table 3 3 Enclosure Leakage Current Limits 3 11 Table 3 4 Patient Leakage Current Limifs 5S AR ee ee 3 12 Table 3 5 Patient Leakage Current Test Configurations Mains Voltage on the Applied Part 3 13 Table 4 1 Language Selection sse 4 3 Table 4 2 Factory Default Settings c nhe 4 5 Table 5 1 Problem Categories 5 2 Table 5 2 Power Problems L enie T HH HH HH k 5 3 Table 5 3 Button Problems A 5 4 Table 5 4 Display Alarms Problems seen 5 5 Table 5 5 Operational Performance Problems 5 6 Table 5 6 Data Port Problems eee 5 7 Table 6 Error Godes iore Peter ean ee 5 8 Table 6 1 Power Supply Leads Connections 6 8 Table 7 1 Parts List te en e e adden 7 1 Table 9 1 Default Settings aaa n ng kh 9 2 Table 10 1 Data Port Pin Outs LH eee 10 2 Table 10 2 Status Codes
6. ee Re eene 10 6 Table 10 3 Nurse Call Relay Pin States ee Ee Re ee ee ee 10 7 Table 10 4 Rating of Nurse Call Relay eee 10 7 SECTION 1 INTRODUCTION 1 1 Manual Overview 1 2 NPB 290 Pulse Oximeter Description 1 3 Related Documents 1 1 MANUAL OVERVIEW This manual contains information for servicing the NPB 290 pulse oximeter Only qualified service personnel should service this product Before servicing the NPB 290 read the operator s manual carefully for a thorough understanding of how to operate the NPB 290 Warning Explosion hazard Do not use the NPB 290 pulse oximeter in the presence of flammable anesthetics 1 2 NPB 290 PULSE OXIMETER DESCRIPTION The Nellcor NPB 290 pulse oximeter is intended for continuous noninvasive monitoring of functional oxygen saturation of arterial hemoglobin SpO2 and pulse rate measured by SpO2 sensor The monitor is intended for use on adult pediatric and neonatal patients in all hospital areas hospital type facilities and in the home environment It may be used during intra hospital transport when powered by its internal battery Digital displays are provided for oxygen saturation and pulse rate and a 10 segment light emitting diode LED bar indicates pulse amplitude The NPB 290 can operate on AC or rechargeable internal battery power The controls and indicators for the NPB 290 are illustrated in Figure 1 1 and Figure
7. ei 2 mae E MN To E O man OOOO me es cs ER OO es On O O Figure 11 15 Power Supply Parts Locator Diagram 035200 11 35 035346 VDD 14CA_GREEN NARG141 14CA_GREEN NARG141 PULSE RATE 11 ay ay ol E O J 0 x T4GA GREEN NARG141 k c1 ca O 1U 47U It 50V 10V U1 19 VDD SEGA27 SEGA 1 SEGHS SEGB 1 SEGE T SEGC 1 BDO 12 Do SEGH S SEGD 1 BD1 11 ip4 sEGH2 SEGE 1 BD2 13 ips SECE22_ SEGE 1 EDS 74 ips SEG 26 SEGG BD4 10 ipa SEGDHAZ SEGDP_1 BD5 Sl ips ED6 5 ipe BD 7 0 BD7 Z ib Dias 18 BLIP BOTTOM AO 9 MODE Diaz Z1 BEP TOP Dias 22 02 100 RED O2 CSL 8 wmre pias 170210 RED Diga 2002 1 RED Dias 23 O2 100 GREEN VDD DiG2 1802 10 GREEN vee o 28 vss DiG1 1502 1 GREEN J1 A ICM7228A 1le gt cs PR_CSL 3 4 AO c2 ca 5 6 1U 47U BDO 7 8 BD1 50V 10V N BD2 9 10 BD3 BD4 11 12 BD5 U2 1 BDS 13 14 BD7 ADD SEG SEG CON 7x2 SEG BDO 12 ipo SEG EID 11 ip4 SEG ED 13 ip2 SEGF BD3 14 ips SEGG ED 19 Da SE
8. Pin Signal 1 RXD RS 422 positive input 2 RXD_232 RS 232 input 3 TXD_232 RS 232 output 4 TXD RS 422 positive output 5 Signal Ground isolated from earth ground 6 AN SpO2 analog saturation output 7 Normally Open Dry Contacts for Nurse Call N O with no active alarm 8 Normally Closed Dry Contacts for Nurse Call N C with no active alarm 9 RXD RS 422 negative input 10 Signal Ground isolated from earth ground 11 Nurse Call RS 232 level output 3 to 10 volts DC with no active alarm 3 to 10 volts DC with active alarm 12 TXD RS 422 negative output 13 AN_PULSE analog pulse rate output 14 AN_PLETH analog pleth wave output 15 Nurse Call Common for Dry Contacts Note When the instrument is turned off the contact at pin 7 closes and the contact at pin 8 opens The pin layouts are illustrated in Figure 10 1 The conductive shell is used as earth ground An AMP connector is used to connect to the data port Use AMP connector AMP P N 747538 1 ferrule AMP P N 1 747579 2 and compatible pins AMP P N 66570 2 9 10 11 12 13 14 15 1 2 3 4 5 6 7 8 Figure 10 1 Data Port Pin Layout When building an RS 422 cable a resistor 120 Q 1 4 watt 5 must be added between pins 1 and 9 of the cable The end of the cable with the resistor added must be plugged into the NPB 290 This resistor is not necessary for RS 232 cables Section 10 Data Port Interface Protocol
9. 2 2N3906S Q26 3 DCH ez 453 len136 AAN DCH 55 N C N O AQVAAAA AQV210EHA NG Hei NC G M NG NG SIP SOP Interface Figure 11 6 SIP SOP Isolation Barrier Schematic Diagram 11 17 RS 485 DRIVER E CMOS LEVEL 035350 RCV_485 14 MAX489 voc RSENAB ITX485_EN TXENAB ITXD Li TXOUT C1 C2 Z5U ca REV 232 12 RIOUT RS232 LHVEL R1IN 13 RXD 232 ITXD 11 T1 IN T1OUT 14 TXD 232 1166 o 9 RH2OUT R2IN le 01167 NC LVL 10 T2IN 1168 US ADM202E SMCJ10C CRY RD 232 TXD 232 ov T BAvoo e RXD RXD NC 232 TXD TXD 8 BIT DAC VDD SCL SDA ADO AD1 AD2 AGND DGND TLE2425CD VIN VOUTI REFO 4 REF1 REF2 REFS OUTO Analog Outputs 173 3 1 0U 20V OUT1 oura 18 outa 15 MAX520S GND 2 c27 O 1U Z5U U13 LT1013S 5 REF u4 1172 o 176 ca2 L I AN_PULSE AN_SPO2 AN_PLETH A 0 6 01 N also O N CO 2 AN_SPO2 ANY c97
10. As 82 ASL O 1204 TXD YY YN 1124 sizo 81 SDA2 SDA2 5 SDA h ng Sizi so SERCLK 80 AA 4 ew PWM VOL 130 BWMA 7amc 86 SERDAT ae 11 ao a zsu i316 FONTSIES pwMB 1209 ela 0 1U m aua o 3 g AC OK L 128 pcL lt 42213 Goi212 A2 C132 m LCOW_BAIT L 4 Pali g Al 1313 CUNG E 18 ics RROMLATECSO 213 7 we NH TURN_OFF 13 S idas Note One ICT per Rpack AT24COT1A DISPLEM 5 liC4 OC5 m AWLLI 01229 CR29 e EL Toc tam Cl Sad m g PWM_FREOG 11 oc2 BKPT DSCLK 56 BKPT W ESSELOSD 23o pd g utt 10 ocs IPIPE DSO 54 w IPIPEO 1340 m DSPLCSL 751179 Ben g c LED e oca IEETCH DSI 55 w IPIPE1 CADDA RXD ES FREEZE QUO 2S g FREEZ RP16 5 6V ss Sms Mu c dioc NN P 1343 o gt Aas aRvcso 118 RRAML SL ER RAMLCSL e Z5U A K SCH OON jams 45 sok Majes 114 HHAMHESI Se HAMHCSL E U46_ R135 g MISO e MISO BGACK Cs2 115 BEEN mk DSPLYCSL e 1128 QMAN_RST 14 PBRST vcc 8 1 00K g MOSI MOSI ECO CSa 118 121 R186 DSPLRDL 2 gt ER SIPSOP EN bd PCSOL 46 Pcso ss EC1 CSa 119 HPBCSL AN i5 sr _ L5 B601 rd PCS1 Fc2 Css 120 SLEDE 121 R152 SEC 7 A RESETL 1328 o e 8 Pcs2 1312 AAA 3 roL RSTH 49 pcss 1327 pP 5 e GND RST 1131 EE ARO 1336 o CLKOUT SS CLKOUT 208 Q toc 3233 323 052 vi Ll haz 1OK JDD 10K MODCLkLZ8 gVDDI Ba 1129 1130 TINO NF TINO 61 VDDSYN LA 601 RIS VDDSYN e e e WD_RST d vssi RWD_RST vasa c1ao J
11. 0 1U Z5U NC_NO Nc_comF1 NC NC TH CON DB15F TH Figure 11 7 Data Port Drivers and Analog Output Schematic Diagram 11 19 VDD 1279 1210 R105 LS A601 45 121 nane VDDI VDDA Ao 90 RAS AAA AO VDDS 1 20 RAI Ter AT DES np 21 RAS RPiT5S AN P A2 VDDA a 22 RAS 120 14 B AS bd bd gt h bd UDDS Aa PS RAT 13 AN la AA E P s I C137 C122 C1as C133 C134 C125 C124 VDDe s 24 RAS T2 B A5 From ewer Supply 47U O 1U O 1U O 1U O 1U O 1U O 1U VDD7 AG 25 RAS LU e EB AS ery D Zm 10V X7R lt 7 x7R x7R x7R x7R VODs AZ BE RAT TO W A7 ogo5 osos 0805 0805 0805 0805 VDDS a 27 RAS 9 B A8 itos q1P59 eer ng So RAS T621 AS 1306 1308 RAMPWR DIDA
12. AC Power Selectable by switch 9 3 PHYSICAL CHARACTERISTICS Dimensions Weight 9 4 ENVIRONMENTAL Operating Temperature Storage Temperature Boxed Unboxed Operating Atmospheric Pressure Relative Humidity Class I per LE C 601 1 clause 2 2 4 Type BF per LE C 601 1 clause 2 1 25 Continuous Rechargeable sealed lead acid internal 8 hours minimum on new fully charged battery and no active alarms 14 hours for full charge in standby 18 hours while in use 2 each 5 x 20 mm Slow Blow 0 5 amp 250 volts 100 120 volts AC 50 60 Hz or 200 240 volts AC 50 60 Hz 3 3 in Hx 10 4 in W x 6 8 in D 8 4 cm H x 26 4 cm W x 17 3 cm D 5 5 lb 2 5 kg 5 C to 40 C 441 F to 104 F 20 C to 70 C 4 F to 158 F 20 C to 60 C 4 F to 140 F 700 hPa to 1060 hPa 20 65 in Hg to 31 27 in Hg 15 RH to 95 RH noncondensing 9 1 Section 9 Specifications 9 5 ALARMS Alarm Limit Range Saturation 20 100 Pulse Rate 30 250 bpm 9 6 FACTORY DEFAULT SETTINGS Table 9 1 Default Settings Parameter Default Setting Alarm Silence Behavior Off with a reminder Audible Alarm Silence Duration 60 seconds Audible Alarm Volume Level 5 Baud Rate 9600 Communication Protocol Serial output mode ASCH High Pulse Rate Alarm 170 bpm Low Pulse Rate Alarm 40 bpm Pulse Beep Volume Level 4 SpO2 High Alarm 100 SpO2 Low Alarm 85 9 7 PERFORMANCE Meas
13. Display Interface Schematic Diagram 11 29 035355 NELLCOR PURITAN BENNETT NPB 295 MAIN BOTTOM SIDE O AO LE du Der Wannan HD E AN Ma SERE a P IP ve ema an sefaar m w ME unt an umm JE Sepp T CC ren res Bodies BOTTOM SIDE EEREREN HEEE PE ue C7 Tum TPZ UR eel OSS vn EE o LLE LEI xuan REVISE Pa on oou yg O ot TH CHA bolama CECR GER BE g AT Eje 2 Me e m V 3 a To ura eessen z 8 Looo lus 4 ws HI ERIE w 1 EET o HI E l H Nh m N ne sd EER mm J FRONT PANCI 5 MKERWPRY VIVITIVIVIVIVI NELLCOR PURITAN BENNETT NPB 295 MAIN TOP SIDE Fei mor Rq Kai AH L tz Luce epp t Se E LG es ne pnr e e OOO ac tr Wm bi m Ke m W xE LT en won ss EE s s ma O LH I peneppe Ba Lt LP JL Hal 107 1 ra CS LE mm ema 2 la IG E Ha ca cm mm A aira afd Son mias KI Tem IPTE UICE EEE oe tot A Ss Dus CIEL e E A c Ls pg as A wans as A ag s E E r RI V T
14. Note When the operator changes an alarm limit to a value other than a power on default value a decimal point is displayed to the right of the parameter whose alarm limit was changed 4 4 5 Menu Item 10 Return to Default Settings Menu item 10 resets the monitor to factory default settings as shown in Table 4 2 three confirmation tones will be heard After menu item 10 has been selected cycle power to the NPB 290 and verify that the factory default values have been reinstated Table 4 2 Factory Default Settings Parameter Default Value Alarm Silence Behavior 0 Off with reminder Alarm Silence Duration 60 seconds Alarm Volume Level 5 Baud Rate 9600 Data Port Format Real time ASCII Nurse Call Polarity Normally Low Pulse beep volume Level 4 Pulse rate High 170 bpm Pulse rate Low 40 bpm SpO2 High 100 SpO2 Low 85 4 4 6 Menu Item 11 Alarm Silence Behavior This menu item is used to change alarm silence behavior Three options 0 1 or 2 can be accessed by first pressing the Upper Alarm Limit button then using the Adjust Up or Down button to scroll to the desired number e Option 0 allows the operator to select Alarm Silence Off There will e Option I allows the operator to select Alarm Silence Off There will e Option 2 does not allow the operator to select Alarm Silence Off When the desired option is indicated in the SpO2 display press the Upper 1 be a reminde
15. and 5 to 12 VOLTS DC during alarm Refer to paragraph 3 3 3 1 5 Ifthe condition still persists replace the User Interface PCB Refer to paragraph 6 11 3 The Nurse Call function relay contacts is not working Verify voltage and current do not exceed values stated in Table 10 4 Replace User Interface PCB Refer to paragraph 6 11 Verify the cable is constructed following procedures outlined in paragraph 10 3 Replace User Interface PCB Refer to paragraph 6 11 5 Analog data inaccurate Verify NPB 290 is operating on AC power Refer to paragraph 3 3 2 1 2 Verify the recorder is calibrated to the NPB 290 Refer to recorder Operator s manual 3 Verify the analog output values by performing the test outlined in paragraph 3 3 3 1 6 4 RS 422 not working 4 Replace User Interface PCB Refer to paragraph 6 11 5 7 Section 5 Troubleshooting 5 7 ERROR CODES 5 8 An error code will be displayed when the NPB 290 detects a non correctable failure When this occurs the unit will stop monitoring sound a low priority alarm that cannot be silenced clear patient data from the display and display an error code Error codes will be displayed with EEE in the saturation display and the number of the code in the pulse rate display i e EEE 1 Table 5 7 provides a complete list of error codes and possible solutions Cycling the power will clear the code and allow the instrument to function
16. tite atte EE e E REDE V Listiof TADIES EE io RUD asna nh iii vi Section 1 IntroducfiOn KENNEN 2 HH HH HH KP Ge ee 2 1 1 1 Manual OvervieW 2 1 HH HH TT TH tk net 2 1 1 22 NPB 290 Pulse Oximeter Description 2 1 1 3 Related Docurrients 2i E iet ebat deed 2 2 Section 2 Routine Maintenance RA SH me 2 1 2 1 RE ER EE EE EE OE eee 2 1 2 2 Periodic Safety and Functional Checks 2 1 2 39 BatterVis u 2 u e dais 2 1 Section 3 Performance Verification 3 1 3 1 Introduction cet AT i Ge DA Aa EDIS Aa aQ 3 1 32 Equipment Needed sss 3 1 3 3 Berformiance Tests si ere ee pe d EE 3 1 did Safety TESIS usted rt nitet niti ss a 3 10 Section 4 Audible Alarm Settings and Service Menu 4 1 4 1 Introduction eiit eoa HR IND EE 4 1 4 2 Audible Alarm Settings sse 4 1 4 3 Operator s Menu Options i e se ee ee ER AA Ge ee khe 4 2 44 Service Menu Options Ee RR AA Ge ee 4 4 Section 5 Troubleshooting UU U uu rece 5 1 51 INWOGUGUON TS emsa uu un T a uh is una arah 5 1 5 2 How to Use this Section a 5 1 5 3 Who Should Perform Repair 5 1 5 4 Replacement Level Supported ii se ee ee RA Re ee
17. 5 1 Alarms 5 5 Button Switch Problems 5 4 Data Port 5 7 Display 5 5 Error Codes 5 8 Guide 5 2 Performance Problems 5 6 Power Problems 5 3 Problem Categories 5 2 Who Should Perform Repas 5 1
18. Connect an SCP 10 or MC 10 sensor input cable to the monitor Connect a D 25 sensor to the sensor input cable 2 3 4 Press the Power On Off button to turn the monitor on 5 Leave the sensor open with the LEDs and photodetector visible 6 After the monitor completes its normal power up sequence verify that the sensor LED is brightly lit 7 Slowly move the sensor LED in close to the photodetector element of the sensor As the LED approaches the photodetector verify that the LED intensity decreases 8 Open the sensor and notice that the LED intensity increases 9 Repeat step 7 and the intensity will again decrease This variation is an indication that the microprocessor is in proper control of LED intensity 10 Turn the NPB 290 off 3 3 3 2 2 Monitor Operation with a Live Subject Pulse oximetry involves connecting the monitor to a live subject for a qualitative test 1 Ensure that the monitor is connected to an AC power source 3 9 Section 3 Performance Verification 2 Connect an SCP 10 or MC 10 sensor input cable to the monitor 3 Connect a Nellcor Durasensor oxygen transducer model DS 100A to the sensor input cable 4 Clip the DS 100A to an adult subject as recommended in the sensor directions for use 5 Press the Power On Off button to turn the monitor on and verify that the monitor is operating 6 The monitor should stabilize on the subject s physiological signal in about 15 to 30 seconds Veri
19. LB Low Battery LM Loss of Pulse w Motion LP Loss of Pulse MO Motion PH Pulse Rate High Limit Alarm PL Pulse Rate Low Limit Alarm PS Pulse Search SD Sensor Disconnect SH Sat High Limit Alarm SL Sat Low Limit Alarm No Data Available T Alarm Parameter Being Violated Note A Sensor Disconnect will also cause three dashes to be displayed in the patient data section of the printout An RS 232 Nurse Call signal can be obtained by connecting to the data port This function is available only when the instrument is operating on AC power The RS 232 Nurse Call will be disabled when the unit is operating on battery power The remote location will be signaled anytime there is an audible alarm If the audible alarm has been turned off or silenced the RS 232 Nurse Call function is also turned off Pin 11 on the data port is the RS 232 Nurse Call signal and pin 10 is ground see Figure 10 1 The voltage between pins 10 and 11 will be 5 volts DC to 12 volts DC or 5 volts DC to 12 volts DC depending on the option chosen in menu item 8 Whenever there is in an audible alarm the output between pins 10 and 11 will reverse polarity An internal Nurse Call relay pins 7 8 and 15 provides dry contacts which can be used to signal a remote alarm These contacts can be used if the instrument is operating on AC or on its internal battery Pin 15 is common pin 7 is normally open N O and pin 8 is normally closed N C The rating o
20. The alarm is silenced when the button is released See Figure 3 7 Figure 3 7 Alarm Silence Duration Release the Alarm Silence button Verify the following a The alarm remains silenced b The Alarm Silence indicator lights c The SpO2 and pulse rate displays resume flashing d The pulse tone is still audible e The audible alarm returns after approximately 60 seconds While pressing the Alarm Silence button press the Adjust Down button until the SpO2 display indicates 30 Press the Adjust Up button and verify that the displays indicate 60 SEC 90 SEC 120 SEC and OFF Release the button when the display indicates OFF Press the Alarm Silence button again and verify that the Alarm Silence indicator flashes Section 3 Performance Verification 10 Wait approximately 3 minutes Verify that the alarm does not return 11 After 3 minutes 10 seconds the alarm silence reminder beeps three times and continues to do so at 3 minute intervals 3 3 3 1 2 Alarm Volume Control After completing the procedure in paragraph 3 3 3 1 1 1 4 5 Press and hold the Alarm Silence button for more than 3 seconds Verify the following a OFF is displayed for approximately 3 seconds b After 3 seconds e a steady tone is heard at the default alarm volume setting e the SpO2 display indicates VOL See Figure 3 8 e the pulse rate display indicates the default setting of 5 Figur
21. The serial cable must have a braided shield providing 100 coverage such as Beldon cable Beldon P N 9616 or equivalent Connectors at both ends of the serial cable must have the shield terminated to the full 360 degrees of the connector s metal shell Do not create sharp bends in the cable this may tear or break the shield 10 4 REAL TIME PRINTOUT When a real time printout 1s being transmitted a new line of data is printed every 2 seconds Every 25 line will be a Column Heading line A Column Heading line will also be printed any time a value in the Column Heading line is changed A real time printout is shown below in Figure 10 2 Note Printouts are available only if the instrument is running on AC power NPB 290 Version 1 0 0 CRC XXXX SpO2 Limit 30 100 PR Limit 100 180 bpm TIME SpO2 PR bpm PA Status Jul 97 14 00 00 00 120 220 Jul 97 14 00 02 00 124 220 Jul 97 14 00 04 00 190 220 Jul 97 14 00 06 00 190 220 Jul 97 14 00 08 00 190 220 Jul 97 14 00 10 00 190 220 Jul 97 14 00 12 00 190 220 Jul 97 14 00 14 00 190 220 Jul 97 14 00 16 00 190 220 Jul 97 14 00 18 00 190 220 Jul 97 14 00 20 01 Jul 97 14 00 22 SD 01 Jul 97 14 00 24 SD 01 Jul 97 14 00 26 SD 01 Jul 97 14 00 28 SD 01 Jul 97 14 00 30 SD 01 Jul 97 14 00 32 SD 01 Jul 97 14 00 34 PS 01 Jul 97 14 00 36 PS 01 Jul 97 14 00 38 PS 01 Jul 97 14 00 40 PS 01 Jul 97 14 00 42 PS 01 Jul 97 14 00 44 PS NPB 290 Version 1 0 0 CRC XXXX SpO2 Lim
22. 0 0 and a software verification number CRC XXXX Neither of these numbers should change during normal operation The numbers will change if the monitor is serviced and receives a software upgrade Alarm Limits NPB 290 Version 1 0 0 CRC XXXX SpO2 Limit 30 100 PR Limit 100 180 bpm TIME SpO2 PR bpm PA The last data field in the top line indicates the high and the low alarm limits for SpO2 and for the pulse rate PR In the example above the low alarm limit for SpO2 is 30 and the high alarm limit 1s 100 Pulse rate alarm limits are 100 bpm low and 180 bpm high Column Headings NPB 290 Version 1 0 0 CRC XXXX SpO2 Limit 30 100 PR Limit 100 180 bpm Actual column headings are in the second row of the Column Heading line Patient data from left to right are the time that the chart was printed the current SpO2 value being measured the current pulse rate in beats per minute bpm the current Pulse Amplitude PA and the operating status of the NPB 290 Section 10 Data Port Interface Protocol Patient Data and Operating Status Time Tag TIME SpO2 PR bpm PA Status 01 Jul 97 14 00 58 100 120 220 Time Tag represents a real time clock in Day Month Year and 24 hour clock The clock is maintained by either AC or battery power If date and time have to be changed follow the procedure outlined in paragraph 10 7 Patient Data NPB 290 Version 1 0 0 CRC XXXX SpO2 Limit 30 100 PR Limit 100 180 bpm TIM
23. 6 11 Section 5 Troubleshooting Table 5 7 Error Codes Code Meaning Possible Solutions 82 Time clock lost 1 Reset time clock 2 Battery power lost check the battery Refer to paragraph 3 3 3 1 7 3 Replace the Power Supply Refer to paragraph 6 8 84 Internal communications error 1 Cycle power to clear error 2 Replace User Interface PCB Refer to paragraph 6 11 5 9 Blank Page SECTION 6 DISASSEMBLY GUIDE 6 1 Introduction 6 2 Prior to Disassembly 6 3 Fuse Replacement 6 4 Monitor Disassembly 6 5 Monitor Reassembly 6 6 Battery Replacement 6 7 Power Entry Module PEM Removal Replacement 6 8 Power Supply Removal Replacement 6 9 Cooling Fan Removal Replacement 6 10 Display PCB Removal Replacement 6 11 User Interface PCB Removal Replacement 6 12 Alarm Speaker Removal Replacement 6 1 INTRODUCTION The NPB 290 can be disassembled down to all major component parts including e PCBs e Battery e Top and Bottom Housing e Speaker e Power Entry Module PEM The following tools are required e Phillips head screwdriver 1 e 10mm open end wrench e Needle nose pliers e Torque wrench 10 inch pounds 1 13 Newton meters e Wire Cutters e Flat blade screwdriver WARNING Before attempting to open or disassemble the NPB 290 disconnect the power cord from the NPB 290 Caution Observe ESD electrostatic discharge precautions when working wit
24. Mallinckrodt s Technical Services Department or your local Mallinckrodt representative to determine the latest version of Score software e Option 2 is intended for Mallinckrodt use only 2 When the desired option is indicated in the SpO2 display press the Upper Alarm Limit button to initiate the current selection Note Menu items greater than 5 cannot be accessed when a valid sensor is connected to the unit 4 3 Section 4 Audible Alarm Settings and Service Menu 4 4 SERVICE MENU OPTIONS Service menu options can be accessed only when the sensor is disconnected from the instrument Only qualified service personnel should access these options Refer to paragraph 4 3 1 for instructions on how to access the menu options and make selections within them Note To reach menu item 8 two invalid tones will be heard when passing through menu items 6 and 7 An invalid tone is a single low pitched tone 4 4 1 Menu Item 6 Not Displayed 442 Menu Item 7 Not Displayed 4 4 3 Menu Item 8 Nurse Call Polarity A negative voltage is provided on pin 10 and a positive voltage on pin 11 that can be used to drive a Nurse Call alarm This voltage will be either 5 volts DC to 12 volts DC or 5 volts DC to 12 volts DC depending on the state of the audible alarm An audible alarm causes the voltage to change polarity Using menu item 8 a choice can be made to make the voltage go either positive or negative during an audible alarm 1 Tw
25. SOM R154 Ke mS e m 50V 1330 o_ e AAA 1000P 410v POV 16v v GND n e l 10V E U1O VREF 50V Uso U53 o NU HLT1013S DG201S SY s Ni TES339CD OT 13 16v U23 2 e PIC RB6 6 16 y LT1013S 4 INH VCC D V L PIC_RBP Ta e ias x a2 Le PIC PER 1018 15 n PIC FEB 9 c x14 a 15 ae cos V GND 124 xo Y OU L E R4 x1 24 9K 150K 4 100K PIC BRC6 2lvo e 22P NN NAN ANN 1 K c64 Y1 VEE ICT OM 220P 5lzo I3O1 50V 135 BOV 3121 vss e NAN 4 VREF 5V R3 R24 R38 CD40539S 374K 100K 121 ue NAN AAN 1283 1157 190 12 1K gt 12 R46 1 ji I 374K PIC_RA2 e PIC RBS3 PIC HB1 PIC HB2 B TOM ANALOG FRONT END g LED_IDRV 10V 10V TLCa39CD T ES mE J Li 0 1U O 1U Z5U Z5U DG201S BYPASS Figure 11 3 035350 UIF PCB Front End Red IR Schematic Diagram 11 11 035350 o 2 MPSA56S Q11 2 vcc 2N3906S Q25 3 2 2N3906S x R192 10 0K 166 R65 20 0K s 2 2N3906S Q24 3 Q8 3 NAN 146 R50 3 32K o 186 A VGC c6 0 1U Z5U 4 7P r 50V LT1013S 2 U31 154 LED_IDRV NE Q2 MPSAO6S 2 vss CD4053S 7 8 C74 i CR10 EE 1N914S VRE ba 14 PIC BREI U11 SPO2 29X RAO RA1 RA2 RAS A4 15 47 o R70 10 0
26. an alarm limit of 85 for 3 seconds Verify that three dashes are displayed at the bottom of the pulse rate display See Figure 3 4 Figure 3 4 Adjusting Low SpO2 Alarm Limit 4 Press the Lower Alarm Limit button Within 3 seconds press and hold the Adjust Down button and verify that the SpO2 display reduces to a minimum of 20 Press and hold the Adjust Up button and verify that the SpO2 display cannot be raised past the upper alarm limit setting of 85 5 Press the Upper Alarm Limit button two times rapidly twice within 3 seconds Verify that the monitor emits two beeps the pulse rate display indicates an alarm limit of 170 and that the SpO2 display window shows three dashes at the top for about 3 seconds See Figure 3 5 Figure 3 5 Adjusting High Pulse Rate Alarm Limit 6 Press the Upper Alarm Limit button two times rapidly Within 3 seconds press and hold the Adjust Down button Verify that the pulse rate display reduces to a minimum of 40 See Figure 3 6 7 Press the Lower Alarm Limit button two times rapidly Verify that the pulse rate display indicates an alarm limit of 40 and that the SpO2 display shows three dashes at the bottom for 3 seconds Figure 3 6 Adjusting Low Pulse Rate Alarm Limit 3 4 Section 3 Performance Verification 8 Press the Lower Alarm Limit button two times rapidly Within 3 seconds press and hold the Adjust Down button Verify that the pulse rate disp
27. c4se _ C141 BE wees O 1U Z gt 10U O O1U Z5U 16V L10 B601 vssa SDA vsss xEc Ls42_ XEC b o 1232 L Lo B601 vsse SCE vss7 EXTAL L82 e o 1233 El vsss 12340 Gas TO ON BACKGROUND DEBUG CONNECTOR Vans xraL so A RRM A 124 1295 VSS10 Lo VDD wS si 332K_ va 9 Hi VSS12 32 768KHZ x x VSS13 IM 1e L BKEIL y EE 3 4 FREEZE Jezis RESETL 6 IPIEEI M C140 smeer C198 7 8 IPIPEO M 68331 JI aap I aap Em 50V T 50v _ CON Be pcc e Eo Figure 11 8 UIF PCB MC331 Core Schematic Diagram 035350 11 21 VDD A 17 0 VDD FLASHPWR O U42 128KX16 1338 A1 11 At To Ao PWR RP3 120 AS 9 15 16 1 DO AA 8 s ed 17 15 We DS AS a bo 19 14 W438 Di AG 6 21 13 2 DS A7 5 AC mis 24 12 N75 D2 AB 4lA7 ps 26 11 We Dio NN AQ 42 A8 Ge 28 10 Iz D3 A10 41 30 SE DIT A9 D7 ANN A11 40 A1O ps 6 A12 39 134 Ge 18 A18 38 20 A12 D10 A14 37 aas Di3 22 DA D4 A15 36 A14 D12 25 B B D12 7T M A16 35 aas Dis 27 D5 A1Z 34 29 e C TT D13 A16 D14 SMAG D15 31 D6 4 T3 D14 13180 aa RY RESETL i VL Di IP55 L 88 BYTE RESET Diz R WL 43 we tre BOOTFL
28. circuit uses an amplifier and one switch in the triple single poll double throw SPDT analog multiplexing unit In order to measure a specified level of oxygen saturation and to still use a standard type combined processor and A D converter the DC offset is subtracted from each signal The DC offsets are subtracted by using an analog switch to set the mean signal value to the mean of the range of the A D converter whenever necessary The AC modulation is then superimposed upon that DC level This is also known as AC ranging Section 11 Technical Supplement Each AC signal is subsequently amplified such that its peak to peak values span one fifth of the range of the A D converter The amplified AC signals are then filtered to remove the residual effects of the PWM modulations and finally are input to the PIC The combined AC and DC signals for both IR and red signals are separately input to the A D converter 11 8 8 Real Time Clock RTC Real time is tracked by the NPB 290 As long as battery power or AC power is available the instrument will keep time If the battery is removed the time clock will have to be reset 11 8 9 Storage of Patient Data Whenever the NPB 290 is turned on it stores a data point in memory every 2 seconds regardless of whether the NPB 290 is monitoring a patient or not Up to 50 alarm limit changes will also be stored in trend data The NPB 290 can store up to 24 hours of trend data The 24 hours of stored
29. ee 5 1 5 5 Obtaining Replacement Parts eed ee ee ee ee AR ee ee ee ee 5 1 5 6 Troubleshooting Guide ee ee ee u aus eem 5 2 57 Error Eodes TT 5 8 Section 6 Disassembly Guide ee RE RE eee 6 1 GT INtOdUEHORN ELE ER NG ENEE 6 1 6 2 Prior to Disassermbly Re AA Re HH mme 6 1 6 3 Fuse Replacement miosina ettet dl ade 6 2 6 4 Monitor Disassembly a 6 3 6 5 Monitor Reassembhy sss eme 6 4 6 6 Battery Replacernent ee ee AA SH 6 5 6 7 Power Entry Module PEM Removal Replacement 6 6 6 8 Power Supply Removal Replacement 6 7 6 9 Cooling Fan Removal Replacemeni ee ee Re ee 6 9 6 10 Display PCB Removal Replacement 6 10 6 11 User Interface PCB Removal Replacemert 6 11 6 12 Alarm Speaker Removal Replacement 6 12 Section 7 Spare PAF S gt 22ccc ER EKKE ENEE EENS GE ee Ee GERS KERE RE RE Re Ee eed 7 1 A ers de ie DEET 7 1 Hi Table of Contents Section 8 Packing for Shipment RE KEER RR RE RE ER RR RE Re EER ARE 8 1 8 1 General Instr ctions iaa Rea ee 8 1 8 2 Repacking in Original Carton 8 1 8 3 Repacking in a Different Carton ee ee AA a 8 3 Section 9 Specifications
30. necessary to convert the current to voltage Because the IR and red signals are absorbed differently by body tissue their received signal intensities are at different levels Therefore the IR and red signals must be demodulated and then amplified separately in order to compare them to each other Demultiplexing is accomplished by means of two circuits that alternately select the IR and red signal Two switches that are coordinated with the IR and red transmissions control selection of the circuits A filter with large time constant follows to smooth the signal and remove noise before amplification The separated IR and red signals are amplified so that their DC values are within the range of the A D converter Because the received IR and red signals are typically at different current levels the signal gain circuits provide independent amplification for each signal as needed The gain in these circuits is adjusted by means of the PWM lines from the PIC After the IR and red signals are amplified they are filtered to improve the signal to noise ratio and clamped to a reference voltage to prevent the combined AC and DC signal from exceeding an acceptable input voltage from the A D converter 11 8 6 Variable Gain Circuits 11 8 7 AC Ranging The two variable gain circuits are functionally equivalent The gain of each circuit is contingent upon the signal s received level and is controlled to bring each signal to approximately 3 5 volts Each
31. normally if no other errors are detected Table 5 7 Error Codes Code Meaning Possible Solutions 1 POST failure Replace User Interface PCB Refer to paragraph 6 11 4 Battery dead 1 Check the voltage selector switch Refer to the N 290 Operator s manual 2 Charge battery for 14 hours Refer to paragraph 3 3 1 3 Leads of battery reversed Refer to paragraph 6 6 4 Replace battery Refer to paragraph 6 6 5 Too many microprocessor resets Cycle power to clear error within a period of time Replace User Interface PCB Refer to paragraph 6 11 Replace Power Supply PCB Refer to paragraph 6 8 6 Boot CRC error 1 Cycle power to clear error 2 Replace User Interface PCB Refer to paragraph 6 11 7 Error on User Interface PCB Cycle power to clear error Check voltage selector switch for proper setting Replace User Interface PCB Refer to paragraph 6 11 11 Flash ROM corruption Cycle power to clear error Replace User Interface PCB Refer to paragraph 6 11 52 Institutional default values lost and Cycle power to clear error reset to factory default values Replace User Interface PCB Refer to paragraph 6 11 76 Error accessing EEPROM Cycle power to clear error Replace User Interface PCB Refer to paragraph 6 11 80 Institutional default values lost and Cycle power to clear error reset to factory default values Replace User Interface PCB Refer to paragraph
32. that value for 60 seconds The third part of the calibration signal is a stair step signal The stair step signal will start at 0 0 volts DC and increase up to 1 0 volt DC in 0 10 volt increments Each increment will be held for 1 second 10 7 INTERACTIVE MODE Introduction When the NPB 290 is connected to a PC through the data port the Interactive Mode is accessible If the Interactive Mode has been accessed real time serial output is stopped and serial input is accepted The user can request printouts and set date and time through the use of the PC and the data port Accessing the Interactive Mode The Interactive Mode can be accessed when the data port of the NPB 290 is connected with a serial cable to a PC Paragraph 10 3 describes the pin outs and how to build a serial cable 10 7 Section 10 Data Port Interface Protocol The Interactive Mode can be accessed from a standard keyboard on a PC by holding the control key down and pressing C twice The PC monitor will display the five options that are available in the Interactive Mode The five options are 1 Dump Instrument Info 2 Set Date and Time 3 Dump Trend 4 Dump Error Log 5 Exit Interactive Mode Interactive Mode Options Pressing the corresponding number on the PC keyboard accesses options Option 1 Dump Instrument Info Menu item 2 Trend Clear described in paragraph 4 3 3 allows the user to delete the most recent trend data Deleted trends can still be re
33. whenever an alarm condition has occurred The final line on the printout is Output Complete This indicates that data has been successfully transmitted with no corruption If there is no Output Complete printed the data should be considered invalid Figure 10 4 is an example of a Trend printout 10 9 Section 10 Data Port Interface Protocol 10 10 NPB 290 Version 1 0 0 000 TREND SpO2 Limit 30 100 PR Limit 100 180 bpm TIME PR bpm 01 Jul 97 14 00 00 120 01 Jul 97 14 00 02 124 01 Jul 97 14 00 04 190 01 Jul 97 14 00 06 01 Jul 97 18 00 43 01 Jul 97 18 00 45 NPB 290 Version 1 0 0 000 Trend SpO2 Limit 80 100 PR Limit 60 180 bpm Time PR bpm 01 Jul 97 18 00 53 01 Jul 97 18 00 55 01 Jul 97 18 01 57 01 Jul 97 18 01 59 01 Jul 97 18 02 01 Output Complete Figure 10 4 Trend Printout Option 4 Dump Error Log A list of all the errors recorded in memory can be obtained by selecting Error Log Dump The first two lines are the Column Headings lines The type of instrument producing the printout software level type of printout and the time of the printout are listed in the first line The second line is printout column headings The final line on the printout is Output Complete This indicates that data has been successfully transmitted with no corruption If there is no Output Complete printed the data should be considered invalid An example of an Error Log printout is shown in Figure 10 5 This option is intended fo
34. 1 Section 5 Troubleshooting 5 6 TROUBLESHOOTING GUIDE 5 2 Table 5 1 categorizes problems with the NPB 290 Refer to the paragraph indicated for further troubleshooting instructions Note Taking the recommended actions discussed in this section will correct the majority of problems you will encounter However problems not covered here can be resolved by calling Mallinckrodt Technical Services or your local Mallinckrodt representative Table 5 1 Problem Categories Problem Area Refer to Paragraph 1 Power 5 6 1 No power up on AC and or DC Fails power on self test Powers down without apparent cause 2 Buttons Monitor does not respond properly to buttons 3 Display Alarms Displays do not respond properly Alarms or other tones do not sound properly or are generated without apparent cause 4 Operational Performance Displays appear to be operational but monitor shows no readings Suspect readings 5 Data Port 5 6 5 NPB 290 and PC not communicating properly Nurse Call not functioning properly All of the categories in Table 5 1 are discussed in the following paragraphs Section 5 Troubleshooting 5 6 1 Power Power problems are related to AC and or DC Table 5 2 lists recommended solutions to power problems Table 5 2 Power Problems Condition Recommended Action 1 BATTERY LOW 1 Ensure that the NPB 290 is plugged into an operat
35. 10 0K N U29 R103 ls e AAN oO PRE VER 49 9K V Gia 12 Ng 2N3904S 2 ONBUTTON D 11 10 0K et CLK R128 4 99K TP47 Critical at approx 5 68V S R126 3 CRIT_BATT L a 131 GN ormally HIGH active LOW VDD 74HC74S O e 3 D CLRIII Q17 2N3904S Mo u37 LT1009S U28 Low at approx 5 85V LM393S 1220 LOW BATT L Normally HIGH active LOW Figure 11 11 UIF PCB Power Supply Schematic Diagram B 035350 11 27 035350 VDD o o 1122 R187 o 2 m mm Je sniz906S d 1285 1 SE s X 1325 OR R140 O 2 oi AA JK 2u3906s Z4HCoos 1284 1 Q20 c29 B O 1U R141 O lb Ua Hein BATLEDDR 4 99K KE 5nI3oo6S 1123 EN R84 Z5U Gs os NAN 971 TU 1289 11 10 OS A alH S19933 S19933 R142 e 13 PSLEDDR 4 99K KZ 2N3906S 1288 Z4HCoos u ANN I 4 951 O R133 1294 1293 249 1277 U24 1286 1287 o R137 bas T 12 MOTNLED O2 CSL 249 a e 13 ASLED R138 74HCO8S 1 e 2 2
36. 232 Nurse Call The Nurse Call relay will remain active Section 11 Technical Supplement 11 8 USER INTERFACE PCB The user interface PCB is the heart of the NPB 290 All functions except the unregulated DC power supply display and keypad reside on the user interface PCB The following text covers the key circuits of the user interface PCB 11 8 1 Regulated DC Power Supply The User Interface PCB receives the MAIN DC unregulated voltage of 7 to 18 volts DC from the power supply or 5 8 to 6 5 volts DC from the internal battery The power supply on the User Interface PCB generates 10 0 5 0 and 5 0 volts DC 11 8 2 Controlling Hardware There are two microprocessors on the User Interface PCB The CPU is a Motorola MC68331CF 331 The second microprocessor PIC16C63 1s referred to as the PIC and is controlled by the CPU CPU The 331 is the main controller ofthe NPB 290 The 331 controls the front panel display data storage instrument status sound generation and monitors and controls the instrument s power The 331 also controls data port communication the Nurse Call feature and analog output Battery voltage is checked periodically by the processor A signal from the processor turns the charging circuit off to allow this measurement to be taken If the processor determines that the battery voltage is below 5 85 0 1 volts DC a low battery alarm is declared by the PIC If battery voltage on the User Interface PCB is measure
37. 49 BATLED PR_CSL 3 4 GAO 1290 U24 5 6 PSLED 9 DDO 7 8 DD1 8 DD2 9 TO DD3 g RESETL 10 DD4 11 12 DD5 DDS 13 14 DD7 DISP_EN Z4HCosas CON 7x2 LL g DSPLYcsL 1206 U24 1 3 GAO Ed AO 2 74HCOBS 1292 TO LED DISPLAY U24 LT 6 DSPLRDL 5 m 1145 Z4HCosas O D 15 0 SE VDD o RP5 120 U39 DDO 1 1G 2 an B1 i8 D8 coso JL DD1 2 W f5 no Bo 17 DS O 1U T DDZ 3 W ha 2lAa Bs 18 DIS ONBUTTON y Z5U DD3 4 M H3 EI aa Ba i5 Dii DD4 5 Y 2 6 As Bs 142_ D12 3_3v ala DDS 6 Wm 7l aa Be 3 D13 u DDe 7 O 8 AZ e7 12 D14 DD7 8 wP as Bs 11 D15 a 1297 ig jD R o G cR22 R143 L BDSPLYCSL deee ese 1OOK a 74HC245S AC OK 1 3 1221 1214 o R132 RPZ 4 99K 2 RP8 INS14S 2N3906S AC_OK 10K E AC LED 10k 3 333 3333 ince ANN TK 922 DIS DIS D 15 0 cres R144 s 10 0K L o 300 AC_LED 1 3 AAA 1 2N7oo2s e gt 1299 J8 U34 Notas R145 ONBUTTON 1 e 2 DEEWEEER g OP LIMIT e Aa BilL18 Ds VDD VDD R189 82 5 BATLED 3 4 UP_LIMIT DOWN_LIMIT s as Ba 17 DS o 200K Wd NDOWN_LIMITS 6 MOTNLEDR E ss 5 alas es 18 DIS 7 8 BENE 1332 6 5 A Ba IS Dii ACPWRLED UE ETN TI 12 ALEMSICA E DOWN BTN 2 5 B5 H3 SAS C100 C102 e 6 B6 o 1U O 1U ASLED 13 144 333 o 8 AZ By 12 D14 SEL e SU 15 16 ALRMSI Pd Sag ss 11 DIS 5 17 Q O SIPIR CON FLEX17 gt 19 G i PBCSL 7AHC2A5S filter cap for U24 U34 290 MEMBRANE PANEL CONNECTOR PBCSL E Figure 11 12
38. 5 Display is flashing but 1 Verify that alarm silence has not been activated there is no audible alarm 2 Check speaker connection to UIF PCB Refer to paragraph 6 12 3 Replace the speaker Refer to paragraph 6 12 4 If the condition persists replace the User Interface PCB Refer to paragraph 6 11 6 An alarm condition exists Replace the User Interface PCB Refer to paragraph but no alarm audible or 6 11 visual is indicated 5 5 Section 5 Troubleshooting 5 6 4 Operational Performance 5 6 Table 5 5 lists symptoms of problems relating to operational performance no error codes displayed and recommended actions If the action requires replacement of a PCB or module refer to Section 6 Disassembly Guide Table 5 5 Operational Performance Problems Symptoms Recommended Action 1 The Pulse Amplitude Indicator seems to indicate a pulse but the digital displays show zeroes 2 SpO2 or pulse rate values change rapidly Pulse Amplitude indicator is erratic 2 An electrosurgical unit ESU may be interfering 3 Verify performance with the procedures detailed 4 If the condition persists replace the User Interface 1 The sensor may be damaged replace it 2 Ifthe condition persists replace the User Interface PCB Refer to paragraph 6 11 1 The sensor may be damp or may have been reused too many times Replace it with performance Move the NP
39. 7 steps 2 and 3 4 Use a 10 mm wrench to disconnect the power supply ground lead from the equipotential lug Figure 6 5 e Disconnect the cooling fan harness from J1 of the power supply Figure 6 7 EN Remove the seven screws shown in Figure 6 6 7 Lift the power supply out of the bottom case Figure 6 6 Power Supply 6 7 Section 6 Disassembly Guide Replacement 8 Connect the AC leads W1 W2 and W3 to the PEM following the instructions in Table 6 1 Table 6 1 Power Supply Leads Connections Power Supply Wire Color Connects To Lead or Label WI Green amp Yellow G Equipotential Lug W2 Brown Labeled L L on the Power Entry Module W3 Blue Labeled N N on the Power Entry Module W4 Red Positive Battery Terminal WS Black Negative Battery Terminal 9 Place the power supply in the bottom case Caution When installing the Power Supply tighten the seven screws to a maximum of 10 inch pounds Over tightening could strip out the inserts in the bottom case rendering them unusable 10 Install the seven screws in the power supply and tighten 11 Connect the cooling fan harness to J1 of the power supply 12 Use a 10 mm open end wrench to connect the power supply ground lead to the equipotential lug Tighten to 12 inch pounds 13 Follow the procedure in paragraph 6 7 steps 5 and 6 14 Verify the ground wire to the PEM i
40. 9 R156 1196 5 16 10 0K 74HC32S 74HC32S D 15 0 7 d 7 D 15 0 035350 Figure 11 9 UIF PCB MC331 Memory Schematic Diagram B 11 23 035350 PWM VOL o SG 1321 TLC27L2 1 1 ANN B de C105 C110 H 47u azu 10V 10V U26 TH VCC GND1 7 gt N C GND S6 I315 TLC27L2 VI2 MO vla voa TDA7ZO52A T C104 47U 10v M C106 47U 10v 1 C88 O 1U Figure 11 10 Speaker Driver Schematic Diagram A 11 25 CR20 U33 MBRS130 MBRS330T3 ATO s 2 b 1 RAMPWR MAIN_OUT 2 p 1 MAIN_DG1 R112 IN OUT a 20 0K R116 GND 100K E 1N914S CHR21 MBRS130 y GNDVIA GNDVIA e HG1 HG2 10 0K e R203 e NW LM393S e 100M Open Collector Output CON_4L_156 NAN Active Low Indicator u35 TP46 a CHR18 LM393S 1N914S H a Q16 3 ld 1 To Linear Power Supply 7 4 SI9953 2 SI9953 5 8 U36 LM2940H e IN ouT 3 G1CSHS YAA 2 4 5 100K C116R114 0 1U BATT_CHECK 3_ 2 p MBRS330T3 1 Q15 TURN_OFF 7 3 1 E NAVV 2N3904s N q GN R127 74HC74S 49 9K ls R120 R129 1193 o 1181 S U29 PRE VCC Q Q13 2N3904S o D e ANN e gt CLK a 3_3V 10 0K 10 0K 3 sv R106 i 1202 BIN PRS
41. 97 7 13 15 Output Complete Version 1 0 0 000 SpO2 Version 1 0 0 000 SpO2 79 79 0 Version 1 0 0 000 SpO2 Instrument PR bpm Instrument PR bpm 58 ST 0 Instrument PR bpm Option 2 Set Date and Time Section 10 Data Port Interface Protocol SpO2 Limit 30 100 PA SpO2 Status SpO2 Limit 80 100 PA SpO2 Status 220 PS SL PL 220 PS SL PL PS LP SL PL SpO2 Limit 80 100 PA SpO2 Status Figure 10 3 Instrument Info Printout PR Limit 100 180 bpm User Interface Status BU LB BU LB BU LB BU LB PR Limit 60 180 bpm User Interface Status A BU LB M BU LB AS M BU LB AS H PR Limit 60 180 bpm User Interface Status When the instrument is sent from the factory the date and time that have been entered are for Pacific Standard Time If the battery has been disconnected or changed the real time clock will not reflect the actual time For either of these reasons it will be necessary to set the date and time Selecting option 2 allows these settings to be entered from the PC keyboard The format for date and time is DD MMM YY HH MM SS The hours minutes and seconds are entered in the 24 hour format Move the cursor to the value that needs to be changed and enter the new value Option 3 Dump Trend A Trend printout will include all data recorded for up to 24 hours of monitoring since the last trend delete was performed A trend line is recorded every 2 seconds or
42. Ato 31 RATO DES 15 NAM P A10 1307 O U43 32 RAII 120 14 B A11 Q gs RICSEL 5J RST 8 SBRI B t 33 RAIZ 13 RAN H A12 SERDATA evo e 1 X e 13 85 HA13 T2 WE A13 BATMEDDA SERCLK 7l cik a14 SS RA14 T Vd AE E ASLEDDR 1282 O p e C120 C121 C127 C123 C126 C128 is 37 RATS TO WF ATS gt MOTNUEDDE Ne 2x4 Aida 0 1U 0 1U 0 1U O 1U OU JL o1u aie 88 HA16 Sm B A16 Ie a C144 EE ala x7R x7R x7R x7R x7R Xx7R 17 431 RA17 LN A 17 0 Ya L 47P 2 0805 0805 0805 0805 0805 0805 A18 42 5 12 A184 A17 989 7 50v A19 CS6 121 1102 Maz nde Gage 3 x2 GND i e pa esa 123 nao 1281 of u A DS1502Z HE 124 s A22 CS9 AAN REAL TIME CLOCK s BESETL a A2s CSio 125 RROMLATECSE 22121 53 HOMLATECSI uod Do D O 15 a 68 RESET Do 111 Do FRONT END RST Di L110 Di M Mon be 109 D2 RPG ps 108 D3 10 2 2 Y 1237 1236 ba L105 Da VDD 104 D5 D5 ales De os De 1219 102 D7 D7 eee BERRL 70 BERR bs 100 DS HALTL 69 HAL T Ge 99 DS DIO Flou VDD POTCSL D10 98 A601 77 apen D11 9Z D11 REII 3333 BATT CHECH cvcvv 76 line Die 94 D12 10K 5 1RQ3 D13 93 DIS NION SCL e BK LT OML 92 D14 TP58 1344 i319 NRQ4 D14 POTCSL o VDD 73 91 D15 R155 IRQ5 D15 MEN do ie y _CRIT_BATT L Z2 Rae 12 R96 499 li NC RELAY L2 B601 IRQqL 71 Iraz Rw 79 RAWER AAN DEN KO I2O1 D 87 AVEC DSACKO 22 BE AC e o 1207 i tran TIEKE e L6 B601 m 1239 DSACK1 gm 1485 EN 0 1125 Ds 85 DSL o 1205 g SEL 61 sci PwR Ls B601
43. B 290 and its cables and sensors as far from the ESU as possible Plug the NPB 290 and the ESU into different AC circuits Move the ESU ground pad as close to the surgical site as possible and as far away from the sensor as possible in Section 3 PCB Refer to paragraph 6 11 Section 5 Troubleshooting 5 6 5 Data Port Table 5 6 lists symptoms of problems relating to the data port and recommended actions If the action requires replacement of the PCB refer to Section 6 Disassembly Guide Table 5 6 Data Port Problems Symptoms Recommended Action 1 No printout is being 1 The unit is running on battery power Connect to received an AC source If the AC indicator is not on Refer to paragraph 5 6 1 2 The monitor s baud rate does not match the printer Change the baud rate of the monitor following instructions in Operator s manual 3 Check connections between data port and printer Refer to paragraph 10 3 4 If the condition still persists replace the User Interface PCB Refer to paragraph 6 11 The unit is running on battery power Connect to an AC source If the AC indicator is not on Refer to paragraph 5 6 1 Verify connections are made between pins 5 or 10 GND and 11 Nurse Call of the data port Refer to paragraph 10 5 2 The Nurse Call function RS232 level is not working Verify output voltage between ground pin 5 or 10 and pin 11 is 5 to 12 VOLTS DC no alarm
44. Calculated Saturation 11 2 Circuit Analysis 11 2 CPU 11 5 AC Input 11 3 AC Ranging 11 7 Battery Circuits 11 4 DC Power Supply 11 5 Display PCB 11 8 Functional Overview 11 2 Input Conditioning 11 7 LED Control 11 6 Membrane Keypad 11 9 PIC Microprocessor 11 6 Power Supply 11 3 Real Time Clock 11 8 Sensor Output 11 6 Signal Gain 11 7 Storage of Patient Data 11 8 User Interface PCB 11 5 Variable Gain Circuits 11 7 Cleaning 2 1 D Data Port Analog Output 10 7 Connecting to 10 2 Enabling 10 1 Interactive Mode 10 7 Interface Protocol 10 1 Real Time Printout 10 3 Date 10 9 Description NPB 290 2 1 Disassembly Monitor 6 3 Prior to 6 1 Disassembly Guide 6 1 E Error Codes 5 8 F Fractional Saturation 11 1 Front Panel 2 1 Functional Checks 2 1 Functional Saturation 11 1 Fuse Replacement 6 2 I Information Dump Instrument 10 8 Interactive Mode 10 7 M Manual Overview 2 1 Measured Saturation 11 2 Menu Items Calibration Signal 4 6 Menu Options 4 2 Accessing Menu Items 4 2 Alarm Silence Behavior 4 5 Baud Rate 4 3 EPP Mode 4 3 Language Selection 4 2 Nurse Call Polarity 4 4 Return to Default 4 5 Save as Default 4 4 Trend Clear 4 2 Trend Print 4 2 N Nurse Call 10 6 0 Overview Manual 2 1 Oximetry Overview 11 1 12 1 Section 12 Index P Packing 8 1 Original Carton 8 1 Wit
45. E SpO2 PR bpm PA Status 01 Jul 97 14 00 58 100 190 220 Patient data and the operating status of the unit are highlighted in the patient data display Parameter values are displayed directly beneath the heading for each parameter In this example the SpO2 is 100 and the pulse rate PR is 190 beats per minute The asterisk next to the 190 indicates that 190 beats per minute is outside of the alarm limits indicated at the far right end in the top row for pulse rate If no data for a parameter is available three dashes will be displayed in the printout The number under PA is an indication of pulse amplitude The number can range from 0 to 254 and will typically range around 45 There are no alarm parameters for this value It can be used for trending information and indicates a change in pulse volume pulse strength or circulation Operating Status NPB 290 Version 1 0 0 CRC XXXX SpO2 Limit 30 100 PR Limit 100 180 bpm TIME SpO2 PR bpm PA 01 Jul 97 14 00 58 100 190 220 The Status column indicates alarm conditions and operating status of the NPB 290 The PH in this example indicates a Pulse High alarm The Status column can have as many as 4 codes displayed in one line of data The status codes are listed in Table 10 2 10 5 Section 10 Data Port Interface Protocol 10 5 NURSE CALL Table 10 2 Status Codes Code Meaning AO Alarm Off AS Alarm Silence BU Battery in Use
46. GDH BD5 Sl ips BD6 5 ipe BD7 7 Ibz pies 18 x AO 9 MODE DIG7 21 Dias 22 PR 100 RED PR C L 8 WETE Dias 17 PR 10 RED 20 PR 1 RED DIG4 Dias 28 PR 100 GREEN Dias 16 PR 10 GREEN 428 vss DiG1 5 PECT GREEN ICM7ZZ8 T4GA GREEN NARG141 BLIP BAR TOP TH DS7 SEGE_1 20 a SEGD 1 19 SEGC 1 18 SEGB 1 17 SEGA 1 16 SEGE 1 15 SEGD 1 14 SEGC 1 13 o jo IN jo Ja ja JO IN SEGB_1 12 SEGA_1 11 2a AAAAAAAAAA HDSP 4850 BLIP_BOTTOM BLIP_TOP Display PCB Schematic Diagram Figure 11 16 11 37 17 Figure 11 Display PCB Parts Locator Diagram 00000000000000 00000000000000 OO O 0000 oo O oo O 0000 OO o OO O 0000 OO 0000000000 0000000000 o OO O OOOO OO OO O 0000 OO o OO O OOOO OO OH 00000000000000 m O O 00000000000000 NELLCOR PURITAN BENNETT NPB 290 DISPLAY TOP SIDE 11 39 Blank Page SECTION 12 INDEX A Alarm Settings Alarm Silence Duration 4 1 Alarm Silence State 4 1 Alarm Volume 4 1 Analog Output 10 7 Audible Alarm Settings 4 1 Authorization Number 8 1 B Battery 2 1 Replacement 6 5 Storage 2 1 C
47. K RAS OSCH VEE vss VW C1 CD4053S 4053 BYPASS VREF c4 0 1U Z5U i VREF Osca VDD MCLR al VSS1 O 1U vss2 Z5U R94 10 0K PIC RSTL RBO 177 e l81 0178 0180 RB1 RB2 RBS RB4 RBS RBG RB7 RCO RC1 RC2 SCK RC3 RC4 RES RCG RCZ PIC16C63 1 Qs w N3904 H 2 L C75 10 33P 10 1 3 Qs O ER mr x OO O 2N3904S 2 R63 10K_0 1 R57 100K PIC_1 OMIE U31 LT1013S 5 O OO d Sang x 9 C71 L O 1U AA U10 TLC339CD 13 VEE vss 6 11 10 FRONT_END_RST 9 12 is 9 2 A 5 GI CD4053S 4 Y Figure 11 4 Front End LED Drive Schematic Diagram 11 13 1115 T2 cna LPE 4841 TP6 VHEF MBRS130 do U12 5 o 2 y 1 8 2H VIN vouT e AAA e e e VIN CRS GND1 GND MBRS130 22U GND2 GND4l cA VSW 1120 O 1U T CR11 czz c1a TP2 y y 78LO5D Z5U Y 1N914S 1000P O 1U FB 0 1U 20v m 596 25U L 22U 2 H 1 AGND
48. Q NELLCOR SERVICE MANUAL NPB 290 Pulse Oximeter Caution Federal law U S A restricts this device to sale by or on the order of a physician To contact Mallinckrodt s representative In the United States call 1 800 635 5267 or 314 654 2000 outside of the United States call your local Mallinckrodt representative C 2002 Mallinckrodt Inc All rights reserved 061096D 1102 0123 Nellcor Puritan Bennett Inc 4280 Hacienda Drive Pleasanton CA 94588 USA Telephone Toll Free 1 800 NELLCOR Mallinckrodt Europe BV Hambakenwetering 1 5231 DD s Hertogenbosch The Netherlands Telephone 31 73 648 5200 Nellcor Puritan Bennett is a wholly owned subsidiary of Mallinckrodt Inc Nellcor Nellcor Puritan Bennett Oxinet II Oxisensor Il and Durasensor are trademarks of Mallinckrodt Inc To obtain information about a warranty if any for this product contact Mallinckrodt Technical Services Department or your local Mallinckrodt representative Notice Purchase of this instrument confers no express or implied license under any Mallinckrodt patent to use the instrument with any sensor that is not manufactured or licensed by Mallinckrodt Covered by one or more of the following U S Patents and foreign equivalents 4 621 643 4 653 498 4 700 708 4 770 179 4 869 254 5 078 136 5 351 685 5 368 026 5 533 507 and 5 662 106 TABLE OF CONTENTS List of Figures List of Tables Table of Contents Ps Ee Er iaa iii Listof EIgUEGS
49. SHO 27 ce anpii RP4 120 FLSHOEL 14 32 OE VD e GND2 1337 29F200 FLASH RAMPWR g_ A 1246 T0 0k RE 314 FRAMPWR L111 B601 W A4 O d g ROMLATECSL A ifg E E A5 Piasa co Ss 2 BOOTFLSHL C118 AG 1250 I S o 5 6 A 17 0 C104 1oU A7 i229 zm 0 1U Z 16V c28 1339 A8 256 a _ 5 _o CON 3x2 Z5U 0 1U A9 1255 BOOTROML Z5U A1O O E BHO 1254 L W 1 _ 71260 Jm Q13 o I259 U41 128KX8 U21 128KX8 A14 22a t 6 AI Ce arelas ps r A1 A1 J 19S_ 1280 AS T as AS T as A1Z 1134 A 9 As A 9 A3 LO 1276 5 8 A4 S BI a4 eg DI 01275 A6 7lAs AS 7 as m _b2 51274 Mor S 5 Ag 13 Ds 5 5 c 13 DO E Da 01273 A7 Do A7 Do W D22 51269 A9 27 as Di 14 DS A9 271 ag Di 14 Di D5 isco AN 25155 alts Dig Si GIE B 1195 A12 35 So DS H8 DIE A12 35 ATO DS H8 D4 DS dt A11 D4 A11 D4 W D29 51265 R148 ie A18 Alaro ps 19 DIS A13 4 aas bs 19 D5 e D9 1266 1278 A14 28 A13 De 20 D14 A14 28 aas De 20 DS z D10 5 1267 ut i AS s A14 pz L21 DAS A A14 pz L21 D7 N Pi o 1268 A A15 A15 Jm 22 o 1261 3 W RL h A17 Share A17 Z Adio D13 ise W 21 51263 74HC32S RAMHCSL 22 ce RAMLCSL 22 ce D15 i264 S co 74HCOOS RESETL 30 CEH RESETL 30 CEH 24 GE RAMOEDIS 24 GE R WL 290 WE ano 18 R WL 294 we anp TT 4810008 L 4310005 MS s PL _ E RESETL RAMHCSL m RAMLCSL U4O U40 4
50. Table 3 1 Dynamic Operating Range SRC 2 Settings NPB 290 Indications Rate Light Modulation SpO2 Pulse Rate 38 HIGH2 LOW 79 83 37 39 112 HIGH1 HIGH 79 83 110 114 201 LOW LOW 79 83 195 207 201 LOW HIGH 79 83 195 207 Note The Nurse Call tests must be performed with the instrument operating on AC power Connect the negative lead of a voltmeter to pin 10 and the positive lead to pm 11 of the data port on the back of the instrument Figure 10 1 Ensure that the audible alarm is not silenced or turned off Set the pulse rate switch of the SRC 2 to create an alarm condition Refer to the SRC 2 Operator s manual Verify that an output voltage at pins 10 and 11 between 5 and 12 volts DC Press the Alarm Silence button With no active audible alarm the output voltage at pins 10 and 11 must be between 5 and 12 volts DC With the instrument in an alarm condition use an ohmmeter to verify that there is no continuity between pins 8 and 15 and that there is continuity between pins 7 and 15 Adjust the alarm limits so that there is no alarm condition Use an ohmmeter to verify that there is continuity between pins 8 and 15 and that there is no continuity between pins 7 and 15 Note The Analog Output tests must be performed with the instrument operating on AC power Connect the negative lead of a voltmeter to pin 10 and the positive lead to pin 6 o
51. Verification and Section 7 Spare Parts To remove and replace a part you suspect is defective follow the instructions in Section 6 Disassembly Guide The circuit analysis in Section 11 Technical Supplement offers information on how the monitor functions WHO SHOULD PERFORM REPAIRS Only qualified service personnel should open the monitor housing remove and replace components or make adjustments If your medical facility does not have qualified service personnel contact Mallinckrodt Technical Services or your local Mallinckrodt representative REPLACEMENT LEVEL SUPPORTED The replacement level supported for this product is to the printed circuit board PCB and major subassembly level Once you isolate a suspected malfunctioning PCB follow the procedures in Section 6 Disassembly Guide to replace the PCB with a known good PCB Check to see if the symptom disappears and that the monitor passes all performance tests Ifthe symptom persists swap back the replacement PCB with the suspected malfunctioning PCB the original PCB that was installed when you started troubleshooting and continue troubleshooting as directed in this section OBTAINING REPLACEMENT PARTS Mallinckrodt Technical Services provides technical assistance information and replacement parts To obtain replacement parts contact Mallinckrodt or your local Mallinckrodt representative Refer to parts by the part names and part numbers listed in Section 7 Spare Parts 5
52. a computer e sending NPB 290 data to the Nellcor Oxinet II System e Nurse Call 10 2 ENABLING THE DATA PORT The data port supports three communication protocols e Option 0 real time ASCII for printouts or displays Option 1 communications with Nellcor Oxinet II system e Option 2 Mallinckrodt Technical Services use only Menu item 4 is used to select baud rate To access menu item 4 e disconnect the sensor cable e press both the Upper and Lower Alarm Limit buttons simultaneously for 3 seconds e press the Upper Alarm Limit button until menu item 6 is displayed e select baud rate by pressing Adjust Up or Adjust Down button 2400 9600 default or 19200 Menu item 5 allows the user to choose between the three communication protocols To access menu item 5 e disconnect the sensor cable e press both the Upper Alarm Limit and the Lower Alarm Limit buttons simultaneously for 3 seconds e press the Upper Alarm Limit button until menu item 5 is displayed e select desired option by pressing the Adjust Up or Adjust Down button Note More information on using menu options is provided in Section 4 10 1 Section 10 Data Port Interface Protocol 10 3 CONNECTING TO THE DATA PORT Data is transmitted in the RS 232 format pins 2 3 and 5 or RS 422 pins 1 4 9 and 12 RS 232 data can be transmitted a maximum of 25 feet The pin outs for the data port are listed in Table 10 1 Table 10 1 Data Port Pin Outs
53. and Lower Alarm Limit buttons simultaneously and then selecting the desired option with the Adjust Up or Adjust Down button These functions are discussed in greater detail in Section 4 11 10 SCHEMATIC DIAGRAMS The following schematics are included in this section Figure 11 3 User Interface PCB Front End Red IR Schematic Diagram Figure 11 4 Front End LED Drive Schematic Diagram Figure 11 5 Front End Power Supply Schematic Diagram Figure 11 6 SIP SOP Isolation Barrier Schematic Diagram Figure 11 7 Data Port Drivers and Analog Output Schematic Diagram Figure 11 8 User Interface PCB MC331 Core Schematic Diagram Figure 11 9 User Interface PCB MC331 Memory Schematic Diagram B Figure 11 10 Speaker Driver Schematic Diagram A Figure 11 11 User Interface PCB Power Supply Schematic Diagram B Figure 11 12 Display Interface Schematic Diagram Figure 11 13 Parts Locator Diagram for USER INTERFACE PCB Figure 11 14 Power Supply Schematic Diagram Figure 11 15 Power Supply Parts Locator Diagram Figure 11 16 Display PCB Schematic Diagram Figure 11 17 Display PCB Parts Locator Diagram 10V
54. arterial pulse reflect absorption by arterial blood nonpulsatile blood and tissue The measurements that are obtained between arterial pulses reflect absorption by nonpulsatile blood and tissue By correcting during pulse absorption for between pulse absorption the NPB 290 determines red and infrared absorption by pulsatile arterial blood Because oxyhemoglobin and deoxyhemoglobin differ in red and infrared absorption this corrected measurement can be used to determine the percent of oxyhemoglobin in arterial blood SpO2 1s the ratio of corrected absorption at each wavelength 11 2 1 Functional versus Fractional Saturation The NPB 290 measures functional saturation that is oxygenated hemoglobin expressed as a percentage of the hemoglobin that is capable of transporting oxygen It does not detect significant levels of dysfunctional hemoglobins In contrast hemoximeters such as the 1L482 report fractional saturation that is oxygenated hemoglobin expressed as a percentage of all measured hemoglobin including measured dysfunctional hemoglobins Section 11 Technical Supplement Consequently before comparing NPB 290 measurements with those obtained by an instrument that measures fractional saturation measurements must be converted as follows functional fractional 100 saturation saturation 100 carboxyhemoglobin methemoglobin 11 2 2 Measured versus Calculated Saturation When saturation is calculated from a blood gas m
55. brane Panel Contained on the Membrane Panel are annunciators and push buttons allowing the user to access information and to select various available parameters The Display PCB contains SpO2 heart rate and Blip Bar LEDs and their associated driver circuits Power Supply Membrane Battery DC Panel Charger Supply m gt Display PCB Alarm Speaker MC68331 CPU System RAM Serial port lt 256K Flash ROM PIC16C63 256K PIC y SpO2 Module Patient U I F PCB Connection Figure 11 2 NPB 290 Functional Block Diagram 11 5 AC INPUT A selector switch on the back of the NPB 290 allows the user to connect the monitor to AC power ranging from 100 volts AC to 240 volts AC The switch has two positions one for 100 volts AC through 120 volts AC and one for 200 volts AC through 240 volts AC Verify that the switch selection matches the AC power at your location before plugging the monitor into an AC outlet AC power enters the NPB 290 through the Power Entry Module PEM A 0 5 amp fuse protects both the Line and Neutral lines These user accessible fuses are located in a fuse drawer which is part of the PEM located on the back of the monitor 11 6 POWER SUPPLY PCB THEORY OF OPERATION The NPB 290 uses an unregulated linear power supply This Power Supply provides the DC power needed to charge the battery and to power the User Interface PCB El
56. ch window 3 3 2 2 Factory Power On Defaults and Alarm Limit Ranges Note Note See Figure 3 1 for the location of the NPB 290 controls When observing or changing default limits a 3 second timeout is in effect that is if no action is taken within 3 seconds the monitor automatically returns to the normal mode 1 Turn the monitor on by pressing the Power On Off button Note Wait for POST to be completed Press and release the Upper Alarm Limit button Verify that the monitor emits a single beep and the SpO2 display indicates a high alarm limit of 100 for about 3 seconds Verify that three dashes are displayed at the top of the pulse rate display See Figure 3 3 The location of the three dashes indicates the type of alarm limit that is being adjusted Three dashes in the top of the display window indicate a high alarm limit and three dashes in the bottom of the display window indicate a low alarm limit 3 3 Section 3 Performance Verification Figure 3 3 Adjusting High SpO2 Alarm Limit 2 Press the Upper Alarm Limit button Within 3 seconds press and hold the Adjust Down button Verify the SpO2 display reduces to a minimum of 85 Note A decimal point to the right of the value in either display indicates that the alarm limits are not power on default values 3 Press the Lower Alarm Limit button Verify that the monitor emits a single beep and that the SpO2 display indicates
57. ct the speaker cable to J13 of the User Interface PCB Follow step 3 of paragraph 6 10 Complete the procedure in paragraph 6 5 6 12 ALARM SPEAKER REMOVAL REPLACEMENT 6 12 Removal 1 Complete the procedure described in paragraphs 6 2 and 6 4 2 Disconnect the speaker wire harness for J13 on the User Interface PCB see Figure 6 10 3 Pull the speaker holding clip towards the center of the monitor and lift the speaker from the top housing Section 6 Disassembly Guide Holding Clip Connect speaker wires to J13 connector Figure 6 10 Alarm Speaker Replacement 4 Slide the speaker into the plastic holding clip provided in the top housing 5 Connect the speaker wire harness to J13 on the User Interface PCB 6 Complete the procedure described in paragraph 6 5 6 13 Blank Page SECTION 7 SPARE PARTS 7 1 Introduction 7 1 INTRODUCTION Spare parts along with part numbers are shown in Table 7 1 Figure 7 1 shows the NPB 290 expanded view with item numbers relating to the spare parts list Table 7 1 Parts List Item Description Part No 1 Top Case Assembly Membrane Panel Included 048497 2 Fuse Drawer 691500 3 Fuses 691032 4 Power Entry Module 691499 5 Cooling Fan 035469 6 Power Supply 035800 7 Display PCB Printed Circuit Card 035347 640119 9 Battery Bracket 035307 10 User Interface PCB 035351 Alarm Speaker not shown 033494 Rubber Feet
58. current The applied voltage for AAMI ESI is 120 volts AC 60 Hz for IEC 601 1 the voltage 1s 264 volts AC 50 to 60 Hz All measurements shall be made with the power switch in both the On and Off positions Refer to Table 3 2 1 Connect the monitor AC plug to the electrical safety analyzer as recommended by the analyzer operating instructions 2 The equipotential terminal is not connected to ground Table 3 2 Earth Leakage Current Limits AC Polarity Line Neutral Leakage Cord Cord Current Normal Closed Closed 500 pA Normal Closed Open 1000 yA 3 4 2 2 Enclosure Leakage Current This test 1s in compliance with IEC 601 1 enclosure leakage current and AAMI Standard ES1 enclosure risk current This test is for ungrounded enclosure current measured between enclosure parts and earth The applied voltage for AAMI ANSI is 120 volts AC 60 Hz and for IEC 601 1 the applied voltage is 264 volts AC 50 to 60 Hz Refer to Table 3 3 1 Connect the monitor AC plug to the electrical safety analyzer as recommended by the analyzer operating instructions 2 Place a 200 cm foil in contact with the instrument case making sure the foil Is not in contact with any metal parts of the enclosure that may be grounded Measure the leakage current between the foil and earth Note The analyzer leakage indication must not exceed values listed Table 3 3 Table 3 3 Enclosure Leakage Current Limi
59. current to the LEDs will induce changes in their spectral output it 1s sometimes necessary to increase the amplification of the received signal channel To that point the PIC controls both the current to the LEDs and the amplification in the signal channel At initialization of transmission the LED intensity level is based on previous running conditions and the transmission intensity 1s adjusted until the received signals match the range of the A D converter If the LEDs reach maximum output without the necessary signal strength the PWMs will increase the channel gain The PWM lines will select either a change in the LED current or signal gain but will not do both simultaneously Section 11 Technical Supplement The LED drive circuit switches between red and IR transmission and disables both for a time between transmissions in order to provide a no transmission reference To prevent excessive heat buildup and prolong battery life each LED is on for only a small portion of the duty cycle Also the frequency of switching is well above that of motion artifact and not a harmonic of known AC transmissions The IR transmission alone and the red transmission alone will each be on for about one fifth of the duty cycle this cycle is controlled by the PIC microprocessor 11 8 4 Input Conditioning 11 8 5 Signal Gain Input to the SpO2 analog circuit is the current output of the sensor photodiode In order to condition the signal current it is
60. d below 5 67 0 1 volts DC the monitor will display an error code and sound an audible alarm Voltages measured at the battery will be slightly higher than the values listed above The user will be unable to begin monitoring a patient if the battery voltage remains below this point If either event occurs plug the unit into an AC source for 14 hours to allow the battery to fully recharge When the NPB 290 is powered by AC the RS 232 Nurse Call function is available If no audible alarm conditions exist the output will be 5 to 12 volts DC or 5 volts DC to 12 volts DC These voltages are dependent upon the option selected in menu item 8 Should an audible alarm occur the output would change polarity The 331 also controls a set of dry contacts provided by a relay on the User Interface PCB The relay will function normally on AC power or on the internal battery power Section 11 Technical Supplement When the CPU sends a tone request three items are used to determine the tone that is sent by the PIC to the speaker First pulse tones change with the SpO2 value being measured The pulse beep tone will rise and fall with the measured SpO2 value Second three levels of alarms each with its own tone can occur high medium and low priority Third the volume of the alarm is user adjustable Alarm volume can be adjusted from level 1 to level 10 with level 10 being the highest volume User s interface includes the front panel d
61. e 3 8 Alarm Volume Display Press the Adjust Down button until an alarm volume setting of 1 is displayed Verify that the volume of the alarm has decreased but is still audible Press the Adjust Up button to increase the alarm volume setting to a maximum value of 10 Verify that the volume increases Press the Adjust Down button until a comfortable audio level is attained Release the Alarm Silence button The tone stops 3 3 3 1 3 Pulse Tone Volume Control 1 3 When a valid pulse has been acquired press the Adjust Up button and verify that the sound level of the beeping pulse tone increases Press the Adjust Down button and verify that the beeping pulse tone decreases until it is no longer audible Press the Adjust Up button to return the beep volume to a comfortable level 3 3 3 1 4 Dynamic Operating Range The following test sequence verifies proper monitor operation over a range of input signals 1 Turn the instrument off and connect the SRC 2 to the NPB 290 Turn the NPB 290 on Place the SRC 2 in the RCAL 63 LOCAL mode Set the SRC 2 as indicated in Table 3 1 Verify that the NPB 290 readings are within the indicated tolerances Allow the monitor several seconds to stabilize the readings 3 7 Section 3 Performance Verification 3 3 3 1 5 Nurse Call 3 3 3 1 6 Analog Output 3 8 Note An asterisk indicates values that produce an alarm Press the Alarm Silence button to silence the alarm
62. e Closed Open 500 pA 50 pA 3 4 2 4 Patient Isolation Risk Current Mains Voltage on the Applied Part This test is in compliance with AAMI Standard ES1 patient isolation risk current sink current and IEC 601 1 patient leakage current Patient Leakage Current is the measured value in a patient connection if mains voltage is connected to that patient connection The applied voltage for AAMI ANSI is 120 volts AC 60 Hz and for IEC 601 1 the applied voltage is 264 volts AC 50 to 60 Hz Warning AC mains voltage will be present on the patient cable terminals during this test Exercise caution to avoid electrical shock hazard 1 Configure the electrical safety analyzer as follows Function Patient Leakage Mains On Applied Part Range uA Section 3 Performance Verification Connect the monitor AC plug to the electrical safety analyzer as recommended by the operating instructions for patient sink leakage current Connect the patient leakage input lead of the electrical safety analyzer to all connectors in the patient cable at the patient end of the cable The equipotential terminal is not connected to ground All functional earth terminals are not connected to ground The analyzer leakage current must not exceed the values shown in Table 3 5 Table 3 5 Patient Leakage Current Test Configurations Mains Voltage on the Applied Part AC Line Neu
63. e Upper Alarm Limit button and then pressing the Adjust Up or Adjust Down key The option being selected is displayed in the SpO2 display window Note Service menu items numbered above 5 cannot be accessed if a sensor is connected to the monitor 3 Once adjustments have been made within a menu item the Upper Alarm Limit button can be used to initiate the current selection To save the current settings as power on default values refer to the procedure outlined in paragraph 4 4 4 4 Menu options can be exited without making changes by pressing the Lower Alarm Limit button Ifa period of 10 seconds passes with no button presses the instrument will exit the service menu go to normal monitoring and no changes will have been made 4 3 2 Menu ltem 1 Trend Print Trend data can be viewed 1f connected to a PC or a trend printout can be made if the Upper Alarm Limit button is pressed when menu item 1 is displayed For more information about trend printouts refer to paragraph 10 4 4 3 3 Menu Item 2 Trend Clear When menu item 2 1s selected trend data that 1s available through the use of menu item 1 will be deleted when the Upper Alarm Limit button is pressed and held until three beeps are heard 43 4 Menu Item 3 Language Selection 1 Seven languages are available for data output to the data port Once menu item 3 has been accessed press the Upper Alarm Limit button Then press the Adjust Up or Adjust Down button until the d
64. e ila H a TELER LE LEIER LY ae cc Ka T ma O Ed np nh E Rn vi Ki ri TRA 1 Ka RUZ CE ER ER REA ir ts E BER a Doum munia A BEER MWU TEE etree rare e Dm oi Gollo Using G IRIS i Mal Lr MOMENTO Pep Cs i na Figure 11 13 Parts Locator Diagram for UIF PCB 11 31 HIGH CURRENT VIAS pud SIE ontro no 111 T2 F1 1 15 FACTA o c2 2ASB TH 4700P 250V _ T1 TH ere cke 22V ws NEUTRAL O H1 CR N SMCJ22C 390K 22v 172W EPS2PC3 N SMcue2c TH zm e R2 Power Entry 100M 1 4W TH D FAN_CTRL 600V TH ESD Protection Main Board D BATT_CHK O w7 MAIN_DG MAN C wo Battery Charge BATT_OUT O we O wa Q2 IRF9510 TH o 18 3 U3 Qe VIN 2N7002S Requires Heat Sink GND VOUT 2 CR7 Nellcor 891196 LM35D TH 1 pe CR4 sw2 112 R7 cne ZER MBRS330T3MTS50B 154K a TH F3 AME o cp N e BATEO wa Battery ws Battery 3 BATT_CHK cae 1N914S Q4 2N3904 TH Figure 11 14 Power Supply Schematic Diagram 035199 11 33 U L NLLCDE PURITAN BENNETT o 8 190 LPS TOP SIDE
65. e voltage applied to the battery 1s 6 8 0 15 volts DC and 1s current limited to 400 80 mA Battery Protection Two types of battery protection are provided by the power supply protection for the battery and protection from the battery Switch SW2 1s a resettable component that protects the battery Switch SW2 opens and turns the charging circuit off if the temperature of the battery rises above 50 C If the output of the battery exceeds 2 5 amps F3 opens Fuse F3 protects the battery from a short to ground of the battery output Fuse F3 cannot be reset Protection from the battery is provided in case the battery 1s connected backwards Should this happen the output of the battery is shorted to ground through CR1 on the User Interface PCB This provides protection for other circuits in the monitor A lead acid battery is used in the NPB 290 It is rated at 6 volts DC 4 amphours When new and fully charged the battery will operate the monitor for 8 hours A new battery will last 15 minutes from the time the low battery alarm 1s declared until the unit is shut down due to battery depletion The battery can withstand 400 charge discharge cycles Recharging the battery to full capacity takes 14 hours in standby and 18 hours if being used Changing from AC to battery power will not interrupt the normal monitoring operation ofthe NPB 290 When the unit is running on battery power the data port will be turned off along with the RS
66. easurement of the partial pressure of arterial oxygen PO2 the calculated value may differ from the NPB 290 SpO2 measurement This is because the calculated saturation may not have been corrected for the effects of variables that can shift the relationship between Pa02 and saturation Figure 11 1 illustrates the effect that variations in pH temperature partial pressure of carbon dioxide PCO2 and concentrations of 2 3 DPG and fetal hemoglobin may have on the oxyhemoglobin dissociation curve pH 100 Temperature EST RE DI y PCO2 Pi GE y 2 3 DPG 2 bi Fetal Hb Ge zt X y f 1 P riis A c ES y pH 9 50 t Temperature M fm t PCO2 2 7 l t 2 3 DPG 50 100 PO mmHg Figure 11 1 Oxyhemoglobin Dissociation Curve 11 3 CIRCUIT ANALYSIS The following paragraphs discuss the operation of each of the printed circuit boards within the NPB 290 pulse oximeter Refer to the appropriate schematic diagram at the end of this section as necessary 11 4 FUNCTIONAL OVERVIEW The monitor functional block diagram is shown in Figure 11 2 Most of the functions of the NPB 290 are performed on the User Interface PCB Functions on the User Interface PCB include the SpO2 module PIC CPU and Memory Other key components of the NPB 290 are the Power Entry Module PEM Power Supply and the Display printed circuit board PCB Section 11 Technical Supplement The Display module consists of the LED display and the Mem
67. ectro Static Discharge ESD protection is also provided by the power supply AC power from the PEM 1s passed through a step down transformer T2 which has two primary and two secondary windings If switch SW1 on the back of the monitor is in the 120 VOLTS AC position the primary windings are in parallel The primary windings are in series if SW1 is in the 240 VOLTS AC position Section 11 Technical Supplement Each secondary winding is fused with a 2 0 amp fuse F1 and F2 Ifa short circuit should occur in the DC circuitry these fuses prevent the transformer from overheating The output of the transformer varies depending on load and input Voltage measured between the outlet of a secondary winding and ground can be from 6 to 20 volts AC High frequency noise from the AC line and from the User Interface PCB is filtered by C and C8 before passing through the bridge rectifler The bridge rectifier provides the DC power used in the NPB 290 The positive output 1s the MAIN_DC ranging from 7 to 18 volts DC This positive voltage 1s used for the battery circuit and to power the User Interface PCB 11 6 1 Battery Circuits 11 7 BATTERY Two circuits are included in this section of the Power Supply PCB One circuit is used to charge the battery and the other circuit provides battery protection Charging Circuit The power supply will charge the battery any time the NPB 290 1s connected to AC power even if the monitor is not turned on Th
68. esired number is displayed in the SpO2 window Table 4 1 lists the languages and their numbers 4 2 Section 4 Audible Alarm Settings and Service Menu Table 4 1 Language Selection Number Language 0 English 1 French 2 German 3 Italian 4 Spanish 5 Dutch 6 Portuguese 2 When the desired option is indicated in the SpO2 display press the Upper Alarm Limit button to initiate the current selection 4 3 5 Menu Item 4 Baud Rate 1 Baud rates of 2400 9600 and 19200 can be selected by first pressing the Upper Alarm Limit button then using the Adjust Up or Adjust Down button to select the desired baud rate The baud rates will be displayed in the SpO2 window as 24 96 or 192 2 When the desired option is indicated in the SpO2 display press the Upper Alarm Limit button to initiate the current selection 4 3 6 Menu Item 5 EPP mode 1 This menu item is used to change the method of sending data to the data port Three options 0 1 or 2 can be accessed by first pressing the Upper Alarm Limit button then using the Adjust Up or Down button to scroll to the desired number e Option 0 enables ASCH This option would be used to send data to a printer or to receive instructions from a computer e Option I sends data from the data port that can be used by the Nellcor Oxinet II system and with Score Software Note When using Score software use the latest version Contact
69. f the contacts is shown in Table 10 4 Table 10 3 shows the state of the contacts for Alarm and No Alarm conditions and for Instrument Off Section 10 Data Port Interface Protocol Table 10 3 Nurse Call Relay Pin States Pin No Alarm Alarm Instrument Off 7N O Open Closed Closed 8 N C Closed Open Open Table 10 4 Rating of Nurse Call Relay Maximum Input Voltage 30 volts AC or DC polarity is not important 120 mA continuous peak 300 mA 100 ms 26 ohms to 50 ohms 40 ohms typical during alarms Ground Reference Isolated Ground Electrical Isolation 1500 volts 10 6 ANALOG OUTPUT Load Current Minimum Resistance Analog outputs are provided for saturation pulse rate and a plethysmographic waveform These outputs are available only if the monitor is operating on AC power The output voltage is 0 0 to 1 0 volts DC for all three parameters A 1 0 volt DC output for saturation equals 100 for pulse rate 1t equals 250 bpm and for plethysmographic waveform 1t equals 255 pulse amplitude units pau The voltage will decrease as the values for these parameters decrease At power up after the completion of POST a calibration signal will automatically be sent This signal can be started manually by accessing menu item 14 The calibration signal will begin at 0 0 volts DC and hold that point for 60 seconds It will then jump up to 1 0 volt DC and hold
70. f the data port located on the back of the instrument Figure 1 2 Turn the instrument off then turn it back on Verify that the output voltage 1s 0 000 0 025 volts DC then after about a minute verify that the voltage has increased to 1 000 0 025 volts DC Move the positive lead to pin 13 and repeat steps 2 and 3 Move the positive lead to pin 14 and repeat steps 2 and 3 Disconnect the voltmeter from the instrument Section 3 Performance Verification 3 3 3 1 7 Operation on Battery Power 1 Turn the instrument on using AC power 2 Disconnect the instrument from AC and verify the AC Power Indicator turns off 3 Verify the instrument continues monitoring normally and that the Low Battery Indicator is not lit Note If the Low Battery Indicator is lit perform the procedure in paragraph 3 3 1 4 Connect the instrument to AC and verify that the AC Power Indicator lights and that the instrument is monitoring normally 3 3 3 2 General Operation The following tests are an overall performance check of the system e LED Excitation Test e Monitor Operation with a Live Subject 3 3 3 2 1 LED Excitation Test This procedure uses normal system components to test circuit operation A Nellcor Oxisensor IT oxygen transducer model D 25 is used to examine LED intensity control The red LED is used to verify intensity modulation caused by the LED intensity control circuit 1 Connect the monitor to an AC power source
71. face cable Refer to paragraph 10 3 Stopwatch Manual or electronic 3 3 PERFORMANCE TESTS The battery should be charged before the monitor is repaired whenever possible Note This section is written using Mallinckrodt factory set defaults If your institution has pre configured custom defaults those values will be displayed Factory defaults can be reset using the configuration procedure described in paragraph 4 4 5 3 3 1 Battery Charge Perform the following procedure to fully charge the battery 1 Connect the monitor to an AC power source 2 Verify that the monitor is off and that the AC Power Battery Charging indicator is lit ave e fia 3 Charge the battery for at least 14 hours 3 1 Section 3 Performance Verification 3 3 2 Performance Tests The power up performance tests 3 3 2 1 and 3 3 2 2 verify the following monitor functions e 3 3 2 1 Power On Self Test e 3 3 2 2 Factory Power On Defaults and Alarm Limit Ranges Power On Off Button Alarm Silence Button EL NELLCOR PURITAN BENNETT NPB 290 HE D ae O min spo Ke a e 0080 illli OM Od w Ur w uw Upper Alarm Limit Button Adjust Adjust Lower Alarm Down Up Limit Button Button Button Figure 3 1 NPB 290 Controls 3 3 2 1 Power On Self Test POST Note See Figure 3 1 for the location of the NPB 290 controls 1 Connect the monitor to an AC power source Verify the AC Power Battery Chargi
72. fy that the saturation and heart rates are reasonable for the subject 3 4 SAFETY TESTS NPB 290 safety tests meet the standards of and are performed in accordance with IEC 601 1 EN 60601 1 Second Edition 1988 Amendment 1 1991 11 Amendment 2 1995 03 and UL 2601 1 August 18 1994 for instruments classified as Class 1 and TYPE BF and AAMI Standard EST ANSI AAMI ESI 1993 3 4 1 Ground Integrity This test checks the integrity of the power cord ground wire from the AC plug to the instrument chassis ground The current used for this test is lt 6 volts RMS 50 or 60 Hz and 25 A 1 Connect the monitor AC power cord to the analyzer as recommended by the analyzer operating instructions 2 Connect the analyzer resistance input lead to the equipotential terminal grounding lug on the rear panel of the instrument See Figure 1 2 Verify that the analyzer indicates 100 milliohms or less 3 4 2 Electrical Leakage The following tests verify the electrical leakage of the monitor e Earth Leakage Current e Enclosure Leakage Current e Patient Applied Risk Current e Patient Isolation Risk Current Mains Voltage on the Applied Part Note For the following tests ensure the AC switch on the rear of the instrument is configured for the AC voltage being supplied Section 3 Performance Verification 3 4 2 1 Earth Leakage Current This test is in compliance with IEC 601 1 earth leakage current and AAMI Standard ES1 earth risk
73. g 5 6 3 Display Alarms Table 5 4 lists symptoms of problems relating to nonfunctioning displays audible tones or alarms and recommended actions If the action requires replacement of a PCB or module refer to Section 6 Disassembly Guide Table 5 4 Display Alarms Problems Symptoms Recommended Action 1 Display values are 1 Try another sensor or relocate the sensor to a missing or erratic different site 2 Ifthe sensor is connected replace the sensor connector assembly 3 If the condition persists replace the sensor extension cable 4 If the condition still persists replace the User Interface PCB Refer to paragraph 6 11 2 Not all display segments 1 Check the connection between the User Interface light during POST PCB and the Display PCB See Figures 6 8 and 6 9 2 Ifthe condition does not change replace the Display PCB Refer to paragraph 6 10 3 If the condition still persists replace the User Interface PCB Refer to paragraph 6 11 3 All Front Panel LED 1 Check the connection between the membrane panel indicators do not light and J5 of the User Interface PCB See Figures 6 8 during POST and 6 9 2 Replace Top Housing assembly Refer to paragraph 6 4 4 Alarm sounds for no 1 Moisture or spilled liquids can cause an alarm to apparent reason sound Allow the monitor to dry thoroughly before use 2 If the condition persists replace the User Interface PCB Refer to paragraph 6 11
74. he monitor as follows 1 Place the monitor in a plastic bag not shown in Figure 8 1 and if necessary accessory items in original packaging 2 Place in shipping carton and seal carton with packing tape 3 Label carton with shipping address return address and RGA number 8 1 Figure 8 1 Repacking the NPB 290 Section 8 Packing for Shipment 8 3 REPACKING IN A DIFFERENT CARTON If the original carton 1s not available use the following procedure to pack the NPB 290 1 Place the monitor in a plastic bag 2 Locate a corrugated cardboard shipping carton with at least 200 pounds per square inch psi bursting strength 3 Fill the bottom of the carton with at least 2 inches of packing material 4 Place the bagged unit on the layer of packing material and fill the box completely with packing material 5 Seal the carton with packing tape 6 Label the carton with the shipping address return address and RGA number 8 3 Blank Page SECTION 9 SPECIFICATIONS 9 1 General 9 2 Electrical 9 3 Physical Characteristics 9 4 Environmental 9 5 Alarms 9 6 Factory Default Settings 9 7 Performance 9 1 GENERAL Designed to meet safety requirements of UL 2601 1 CSA C22 2 No 601 1 M90 IEC 601 1 Class I type BF ISO 9919 EMC per EN 60601 1 2 9 2 ELECTRICAL Protection Class Degree of Protection Mode of Operation Battery Type Operating time Recharge period Fuses
75. hin the unit Note Some spare parts have a business reply card attached When you receive these spare parts please fill out and return the card 6 2 PRIOR TO DISASSEMBLY 1 Turn the NPB 290 off by pressing the Power On Off button 2 Disconnect the monitor from the AC power source 6 1 Section 6 Disassembly Guide 6 3 FUSE REPLACEMENT 1 Complete the procedure in paragraph 6 2 2 Disconnect the power cord from the back of the monitor 3 Use a flat blade screwdriver to remove the fuse drawer from the Power Entry Module Press down on the tab in the center of the fuse drawer with the screwdriver until a click is heard Pull the drawer out as shown in Figure 6 1 Figure 6 1 Fuse Removal 4 Put new 5 x 20 mm slow blow 0 5 amp 250 volt fuses in the drawer and reinsert the drawer in the power module 6 2 Section 6 Disassembly Guide 6 4 MONITOR DISASSEMBLY Caution Observe ESD electrostatic discharge precautions when disassembling and reassembling the NPB 290 and when handling any of the components of the NPB 290 1 Set the NPB 290 upside down as shown in Figure 6 2 Corner screws Figure 6 2 NPB 290 Corner Screws 2 Remove the four corner screws 3 Turn the unit upright 4 Separate the top case from the bottom case of the monitor being careful not to stress the wire harnesses between the cases 5 Place the two halves of the monitor on the table as shown in F
76. hout Original Carton 8 3 Performance Tests 3 1 Alarm Limit Ranges 3 3 Alarm Silence 3 5 Alarm Volume Control 3 7 Alarms 3 5 Analog Output 3 8 Battery Charge 3 1 Dynamic Operating Range 3 7 Factory Power On Defaults 3 3 LED Excitation Test 3 9 Nurse Call 3 8 Operation on Battery Power 3 9 Operation with Live Subject 3 10 POST 3 2 Power On Self Test 3 2 Pulse Tone Volume Control 3 7 Performance Verification 3 1 Equipment Needed 3 1 Printouts 10 3 R Real Time Printouts 10 3 Rear Panel 2 2 Reassembly Monitor 6 4 Related Documents 2 2 Removal Display PCB 6 10 Fan 6 9 Power Entry Module 6 6 Power Supply 6 7 Speaker 6 12 User Interface PCB 6 11 Replacement Display PCB 6 10 Fan 6 9 Power Entry Module 6 6 12 2 Power Supply 6 8 Speaker 6 13 User Interface PCB 6 12 Replacement Level Support 5 1 Replacement Parts Obtaining 5 1 Returned Goods Authorization Number 8 1 Routine Maintenance 2 1 A Safety Checks 2 1 Safety Tests 3 10 Earth Leakage Current 3 11 Enclosure Leakage Current 3 11 Ground Integrity 3 10 Patient Applied Risk Current 3 12 Patient Isolation Risk Current 3 12 Saturation Calculated 11 2 Fractional 11 1 Functional 11 1 Measured 11 2 Service Menu 4 1 Spare Parts 7 1 Specifications 9 1 T Technical Supplement 11 1 Time 10 9 Trend Dump 10 9 Troubleshooting
77. i ere aer He t Pe PO d ORI led 6 13 NPB 290 Exploded View 7 2 Repacking the NPB 290 ee ee Re RR HH HH 8 2 Data Port Pin Layout 10 2 Real Time Printout iese ss lisis 10 3 Instrument Info Prinf OUf ee u ee ee ee ee e 10 9 Trond PrintOUt ss toic ret ees etr De VR Deeg GE GEL 10 10 Error Log PrintoUt iier eret eR 10 10 Oxyhemoglobin Dissociation Curve s 11 2 NPB 290 Functional Block Diagram lt 5 11 3 User Interface PCB Front End Red IR Schematic Diagram 11 9 Front End LED Drive Schematic Diagram 11 9 Front End Power Supply Schematic Diagram 11 9 SIP SOP Isolation Barrier Schematic Diagram 11 9 Data Port Drivers and Analog Output Schematic Diagram 11 9 User Interface PCB MC331 Core Schematic Diagram 11 9 User Interface PCB MC331 Memory Schematic Diagram B 11 9 Figure 11 10 Speaker Driver Schematic Diagram A 11 9 Figure 11 11 User Interface PCB Power Supply Schematic Diagram B 11 9 Figure 11 12 Display Interface Schematic Diagram 11 9 Figure 11 13 Parts Locator Diagram for USER INTERFACE PCB 11 9 Figure 11 14 Power Supply Schematic Diaoram sesse ee ee ee ee ee 11 9 Figure 11 15 Power Supply Parts Locator Diagram
78. igure 3 3 Figure 3 4 Figure 3 5 Figure 3 6 Figure 3 7 Figure 3 8 Figure 4 1 Figure 6 1 Figure 6 2 Figure 6 3 Figure 6 4 Figure 6 5 Figure 6 6 Figure 6 7 Figure 6 8 Figure 6 9 Figure 6 10 Figure 7 1 Figure 8 1 Figure 10 1 Figure 10 2 Figure 10 3 Figure 10 4 Figure 10 5 Figure 11 1 Figure 11 2 Figure 11 3 Figure 11 4 Figure 11 5 Figure 11 6 Figure 11 7 Figure 11 8 Figure 11 9 Table of Contents NPB 290 Front Panel sse 2 1 NPB 290 Rear Panel 2 2 NPB 290 Controls ee ai naa HH ee nhu 3 2 Power On Self Test Display 3 3 Adjusting High SpO2 Alarm Limit ee 3 4 Adjusting Low SpO2 Alarm Limit c ee 3 4 Adjusting High Pulse Rate Alarm Limit 3 4 Adjusting Low Pulse Rate Alarm Limit 3 4 Alarm Silence Duration 3 6 Alarm Volume Display 3 7 NPB 290 Controls eee rete eret tides 4 1 Fuse Removal ibt rper bra PR c Hi 6 2 NPB 290 Corner Screws HH eee 6 3 Separating Case Halves ee ee LH nhe 6 4 Battery Removal a u bee bet ees a e R es 6 5 Power Entry Module ee ee Ge Re aa ene 6 6 Power SUDDIY EES doit 6 7 Goolinig Fan 55 AL dale OIE OE EE LE 6 9 Display POB cscs N EE EE 6 10 User Interface PCB eiie defe n ides 6 11 Alarm Speaker dir
79. igure 6 3 6 Disconnect the power supply from J6 on the User Interface PCB 6 3 Section 6 Disassembly Guide J6 Power supply harness Figure 6 3 Separating Case Halves 6 5 MONITOR REASSEMBLY 1 2 3 4 5 Place the two halves of the monitor on the table as shown in Figure 6 3 Connect the power supply to J on the User Interface PCB Place the top case over the bottom case Align the four outside screw posts Close the monitor Caution When reassembling the NPB 290 hand tighten the screws that hold the cases together to a maximum of 10 inch pounds Over tightening could strip out the screw holes in the top case rendering them unusable 6 6 4 Install the four corner screws Section 6 Disassembly Guide 6 6 BATTERY REPLACEMENT Removal 1 Follow procedure in paragraphs 6 2 and 6 4 2 Remove the two screws from the battery bracket as shown in Figure 6 4 3 Lift the battery out of the bottom case 4 Use needle nose pliers to disconnect the leads from the battery Note The lead acid battery is recyclable Do not dispose of the battery by placing it in the regular trash Dispose of properly according to state local or other applicable regulations or contact Mallinckrodt Technical Services to return for disposal Figure 6 4 Battery Removal Replacement 5 Connect the leads to the battery e Red wire connects to the positive terminal e Black wire goes to the negati
80. ional AC indicator lights outlet and the AC indicator is on steadily while NPB 2 Check the fuses The Power Entry Module contains the 290 is connected to fuses as indicated in paragraph 6 3 and Figure 6 1 of AC and battery is Section 6 Disassembly Guide Replace fuses if necessary fully charged 3 Open the monitor as described in paragraph 6 4 Verify the power supply s output to the battery while on AC power Disconnect the battery leads from the battery and connect a digital voltmeter DVM to the leads from the power supply The voltage measured should be 6 80 volts DC 0 15 volts DC Connect the negative lead to the battery connect the DVM in series between the positive leads of the battery and the power supply The current measured should be 400 mA 80 mA Replace power supply if above values are not met refer to paragraph 6 8 4 Check the cable connection from the bottom enclosure to the User Interface PCB as instructed in paragraph 6 11 of Section 6 Disassembly Guide If the connection is good replace the User Interface PCB 2 The NPB 290 does not operate when disconnected from AC power 1 The battery may be discharged To recharge the battery refer to paragraph 3 3 1 Battery Charge The monitor may be used with a less than fully charged battery but with a corresponding decrease in operating time 2 Ifthe battery fails to hold a charge replace the battery as indicated in paragraph 6 6 3 BATTERY LOW i
81. isplay and the keypad By pressing any of six keys on the keypad the operator can access different functions of the NPB 290 The 331 will recognize the keystroke and make the appropriate change to the monitor display to be viewed by the operator Any changes made by the operator i e alarm limits pulse beep volume are used by the monitor until it is turned off Default values will be restored when the unit is turned back on Patient data is stored by the NPB 290 and can be downloaded to a printer through the data port provided on the back of the monitor An in depth discussion of the data port is covered in the Section 10 of this manual PIC Microprocessor The PIC controls the SpO2 function and communicates the data to the 331 A pulse width modulator PWM function built into the processor controls the SpO2 function PWM signals are sent to control the intensity of the LEDs in the sensor and to control the gain of the amplifiers receiving the return signals from the photodetector in the sensor Analog signals are received from the SpO2 circuit on the User Interface PCB An A D Analog to Digital function in the PIC converts these signals to digital values for SpO2 and heart rate The values are sent to the 331 to be displayed and stored 11 8 3 Sensor Output LED Control The SpO2 analog circuitry controls the red and infrared IR LEDs such that the received signals are within the dynamic range of the input amplifier Because excessive
82. it 30 100 PR Limit 100 180 bpm TIME SpO2 PR bpm PA Status 01 Jul 97 14 00 46 PS NPB 290 Version 1 0 0 CRC XXXX SpO2 Limit 80 100 PR Limit 100 180 bpm TIME SpO2 PR bpm PA Status 01 Jul 97 14 00 56 79 59 SL PL LB 01 Jul 97 14 00 58 79 59 PS SL PL LB CC cc OO OO c Figure 10 2 Real Time Printout 10 3 Section 10 Data Port Interface Protocol Column Heading NPB 290 Version 1 0 0 CRC XXXX SpO2 Limit 30 100 PR Limit 100 180 bpm TIME SpO2 PR bpm PA Status To explain the printout it will be necessary to break it down to its key components The first two lines of the chart are the Column Heading shown above Every 25 line will be a Column Heading A Column Heading is also printed whenever a value of the Column Heading is changed There are three Column Heading lines shown in Figure 10 2 Using the top row as the starting point there are 25 lines before the second Column Heading is printed The third Column Heading was printed because the SpO2 limits changed from 30 100 to 80 100 Printout Source NPB 290 Version 1 0 0 CRC XXXX SpO2 Limit 30 100 PR Limit 100 180 bpm SpO2 PR bpm PA Status Data in the highlighted box above represents the source of the printout in this case the NPB 290 Software Revision Level Version 1 0 0 CRC XXXX SpO2 Limit 30 100 PR Limit 100 180 bpm SpO2 PR bpm PA Status The next data field tells the user the software level Version 1
83. lay reduces to a minimum of 30 9 Press the Lower Alarm Limit button two times rapidly Within 3 seconds press and hold the Adjust Up button Verify that the pulse rate display cannot be adjusted above 40 10 Press the Power On Off button to turn the unit off Turn the unit back on 11 Press and release the Upper Alarm Limit button Verify that the SpO2 display indicates an alarm limit of 100 12 Press and release the Lower Alarm Limit button Verify that the SpO2 display indicates an alarm limit of 85 13 Press the Upper Alarm Limit button two times rapidly Verify that the pulse rate display indicates an alarm limit of 170 14 Press the Lower Alarm Limit button two times rapidly Verify that the pulse rate display indicates an alarm limit of 40 15 Press the Power On Off button to turn the monitor off 3 3 3 Hardware and Software Tests Hardware and software testing includes the following tests e 3 3 3 1 Operation with a Pulse Oximeter Tester 3332 General Operation 3 3 3 1 Operation with a Pulse Oximeter Tester Operation with an SRC 2 pulse oximeter tester includes the following tests 333 11 Alarms and Alarm Silence 3 3 3 1 2 Alarm Volume Control 333 13 Pulse Tone Volume Control e 333 14 Dynamic Operating Range 333 1 5 Nurse Call 3 33 1 6 Analog Output 3 33 1 7 Operation on Battery Power 3 3 3 1 1 Alarms and Alarm Silence 1 Connect the SRC 2 pulse oximeter tester to the sens
84. lay PCB towards the inside of the instrument and gently slide the Display PCB into the grooves in the top case Be careful to align the male pins from the Display PCB to connector J2 on the User Interface PCB 4 Complete the procedure described in paragraph 6 5 Section 6 Disassembly Guide 6 11 USER INTERFACE PCB REMOVAL REPLACEMENT Removal 1 Complete the procedure described in paragraphs 6 2 and 6 4 2 Follow step 2 of paragraph 6 10 Figure 6 8 3 Disconnect the keypad ribbon cable from the ZIF connector J8 on the User Interface PCB Figure 6 9 Lift up on the outer shell until 1t clicks then remove the ribbon cable from the connector 4 Disconnect the speaker cable from J13 of the User Interface PCB 5 Remove the five screws in the User Interface PCB Figure 6 9 User Interface PCB 6 Remove the User Interface PCB from the top case Section 6 Disassembly Guide Replacement Caution When installing the User Interface PCB hand tighten the five screws to a maximum of 10 inch pounds Overtightening could strip out the inserts in the top case rendering them unusable 7 8 9 10 11 12 13 14 Place the User Interface PCB in the top case Install the five screws in the User Interface PCB Lift up on the outer shell of J8 on the User Interface PCB until 1t clicks Insert the keypad ribbon cable into J8 of the User Interface PCB Slide the outer shell of J8 down until it clicks Conne
85. ndicator on during DC operation and There are 15 minutes or less of usable charge left on the NPB 290 battery before the instrument shuts off At this point if possible cease use of the NPB 290 on battery power connect an alarm is it to an AC source and allow it to recharge The full recharge sounding takes 14 hours The NPB 290 may continue to be used while it is recharging 4 Battery does not 1 Replace battery if more than 2 years old charge 2 Perform step 3 of the recommended action for condition 1 above 5 3 Section 5 Troubleshooting 5 6 2 5 4 Buttons Table 5 3 lists symptoms of problems relating to nonresponsive buttons and recommended actions Ifthe action requires replacement of a PCB refer to Section 6 Disassembly Guide Table 5 3 Button Problems Symptoms Recommended Action 1 The NPB 290 responds to 1 Replace Top Housing assembly Refer to paragraph some but not all buttons 6 4 2 If the buttons still do not work replace the User Interface PCB Refer to paragraph 6 11 2 The NPB 290 turns on but 1 Check the connection between the membrane panel does not respond to any of and J5 of the User Interface PCB Refer to paragraph the buttons 6 10 2 Replace Top Housing assembly Refer to paragraph 6 4 3 If the buttons still do not work replace the User Interface PCB Refer to paragraph 6 11 Section 5 Troubleshootin
86. ng indicator is lit e 2 Do not connect any input cables to the monitor 3 Observe the front panel of the monitor With the monitor off press the Power On Off button Verify that the monitor performs the following sequence a Red 8 8 8 is displayed in both windows for a few seconds and the 10 segment blip bar is completely illuminated in green Only the AC Power Indicator is illuminated 3 2 Note Section 3 Performance Verification Alarm Low Battery AC Power 8 8 8 displayed Silence Indicator Indicator Indicator EL NELLCOR PURITAN BENNETT NPB 290 i can 5 7 BE e Spo Ne e OM Qd ww w W Motion 10 segments Indicator Pulse Search illuminated Indicator Figure 3 2 Power On Self Test Display b The 8 8 8 displayed in both windows turns green the 10 segment blip bar is completely illuminated in green and all LEDs are illuminated as shown in Figure 3 2 c The software version 1s displayed and all LEDs are illuminated d A 1 second POST beep sounds 3 dashes are displayed in each window and all LEDs are off except the AC Power LED When a sensor 1s connected a zero is displayed in each window a 1 second Power On Self Test POST beep sounds and the Pulse Search LED is illuminated along with the AC Power Battery Charging LED e The NPB 290 begins normal operation if a sensor is connected Without a sensor the monitor will display 3 dashes in ea
87. not shown 4 003818 00 Power Cord not shown U S 071505 International 901862 U K 901863 Tilt Stand not shown 891340 GCX Mounting Kit not shown 035434 Note Some spare parts have a business reply card attached When you receive these spare parts please fill out and return the card 7 1 Section 7 Spare Parts Figure 7 1 NPB 290 Exploded View SECTION 8 PACKING FOR SHIPMENT 8 1 General Instructions 8 2 Repacking in Original Carton 8 3 Repacking in a Different Carton To ship the monitor for any reason follow the instructions in this section 8 1 GENERAL INSTRUCTIONS Pack the monitor carefully Failure to follow the instructions in this section may result in loss or damage not covered by any applicable Mallinckrodt warranty If the original shipping carton is not available use another suitable carton North American customers may call Mallinckrodt Technical Services Department to obtain a shipping carton Before shipping the NPB 290 contact Mallinckrodt Technical Services Department for a returned goods authorization RGA number Mark the shipping carton and any shipping documents with the RGA number European customers not using RGA numbers should return the product with a detailed written description of the problem Return the NPB 290 by any shipping method that provides proof of delivery 8 2 REPACKING IN ORIGINAL CARTON If available use the original carton and packing materials Pack t
88. o options 0 or 1 can be accessed by first pressing the Upper Alarm Limit button then using the Adjust Up or Down button to scroll to the desired number e Selecting option 0 makes the voltage negative during an audible alarm and positive when there is no audible alarm e Selecting option 1 makes the voltage positive during an audible alarm and negative when there is no audible alarm 2 When the desired option is indicated in the SpO2 display press the Upper Alarm Limit button to save the current selection 44 4 Menu Item 9 Save Current Values as Power On Default If menu item 9 1s selected the current values for alarm limits alarm volume pulse beep volume audible alarm silence duration alarm silence behavior communications protocol and baud rate will be saved as the power on default settings To save new values as the current power on default values press the Upper Alarm Limit button Three tones will sound to indicate that the changes have been accepted The following values are not allowed to be saved as power on default values e Alarm Silence Duration of Off e Low SpO2 alarm limits less than 80 If an invalid tone is heard instead of the triple beep the current settings were not changed An invalid tone is a single low pitched tone Note Current values will not be stored in memory as defaults if power is interrupted before exiting this menu option 4 4 Section 4 Audible Alarm Settings and Service Menu
89. on the monitor or its accessories To clean the NPB 290 dampen a cloth with a commercial nonabrasive cleaner and wipe the exterior surfaces lightly Do not allow any liquids to come in contact with the power connector fuse holder or switches Do not allow any liquids to penetrate connectors or openings in the instrument cover Wipe sensor cables with a damp cloth For sensors follow the individual directions for use 2 2 PERIODIC SAFETY AND FUNCTIONAL CHECKS The NBP 290 requires no calibration The battery should be replaced at least every 24 months paragraph 6 6 The following checks should be performed at least every 24 months by a qualified service technician 2 2 1 Periodic Safety Checks 1 Inspect the equipment for mechanical and functional damage 2 Inspect safety labels for legibility If the labels are not legible contact Mallinckrodt Technical Services Department or your local Mallinckrodt representative 2 2 2 Functional Checks 2 3 BATTERY If the monitor has been visibly damaged or subjected to mechanical shock for example if dropped perform the performance tests refer to paragraph 3 3 The following checks should be performed at least every 2 years by a qualified service technician 1 Perform the electrical safety tests detailed in paragraph 3 4 If the unit fails these electrical safety tests refer to Section 6 Troubleshooting 2 Inspect the fuses for proper value and rating F1 amp F2 0 5 am
90. or input cable and connect the cable to the monitor Refer to SRC 2 Operator s manual Set the SRC 2 switches as follows SWITCH POSITION RATE 38 LIGHT HIGH 1 MODULATION OFF RCAL MODE RCAL 63 LOCAL 3 5 Section 3 Performance Verification 3 6 2 Press the Power On Off button to turn the monitor on After the normal power up sequence verify that the pulse rate initially indicates zeroes Note The pulse amplitude indicator may occasionally indicate a step change as the monitor is in the pulse search mode Set the modulation switch on the SRC 2 to HIGH Verify that the following monitor reactions a The pulse amplitude indicator begins to track the artificial pulse signal from the SRC 2 b The pulse tone is heard c Zeroes are displayed in the SpO2 and pulse rate displays d After about 10 to 20 seconds the monitor displays oxygen saturation and pulse rate as specified by the tester Verify that the values are within the following tolerances e Oxygen saturation range 79 to 83 e Pulse rate range 37 to 39 bpm e The audible alarm sounds and both the SpO2 and pulse rate displays flash the values in red This is an indication that both parameters have violated the default alarm limits Press and hold the Alarm Silence button located on the front of the monitor for less than 3 seconds Verify that the pulse rate display indicates SEC and the SpO2 display indicates 60 while the Alarm Silence button is pressed
91. or the alarm can be turned to Off 4 2 3 Alarm Volume 1 Press and hold the Alarm Silence button for more than 3 seconds 2 After 3 seconds while still pressing the Alarm Silence button the Adjust Up or Adjust Down button can be used to select alarm volumes from 1 to 10 Select a level that is suitable for the monitor s location 4 1 Section 4 Audible Alarm Settings and Service Menu 4 3 OPERATOR S MENU OPTIONS The menu items listed below are options that are available to the operator These options can be used to print or clear trend data and to change the configuration of data from the data port Changes can be made in menu options 1 through 5 while monitoring a patient Menu items beyond 5 cannot be accessed when a sensor is connected to the instrument Unless changes are saved as power on default values they will be lost when the NPB 290 is turned off When the instrument is turned on again 1t will begin to use the power on default values that have been stored Factory set power on default values are listed in Table 4 2 4 3 1 Accessing Menu Items 1 Menu items can be accessed at any time by pressing the Upper and Lower Alarm Limit buttons simultaneously for at least 3 seconds Menu options have been accessed when a 1 appears in the pulse rate display 2 Pressing the Adjust Up or Adjust Down button selects the menu item number Menu items 3 5 8 and 11 have options within them that can be selected by first pressing th
92. p 250 volts Mallinckrodt recommends replacing the instrument battery every 2 years When the NPB 290 is going to be stored for 2 months or more remove the battery To replace or remove the battery refer to Section 6 Disassembly Guide 2 1 Section 2 Routine Maintenance If the NPB 290 has been stored for more than 30 days charge the battery as described in paragraph 3 3 1 A fully discharged battery requires 14 hours to receive a full charge when the NPB 290 1s in the standby mode and 18 hours if the NPB 290 is in use The battery is being charged anytime that the instrument is plugged into AC power 2 2 SECTION 3 PERFORMANCE VERIFICATION 3 1 Introduction 3 2 Equipment Needed 3 3 Performance Tests 3 4 Safety Tests 3 1 INTRODUCTION This section discusses the tests used to verify NPB 290 performance following repairs or during routine maintenance All tests can be performed without removing the NPB 290 cover If the NPB 290 fails to perform as specified in any test repairs must be made to correct the problem before the monitor is returned to the user 3 2 EQUIPMENT NEEDED Equipment Description Digital multimeter DMM Fluke Model 87 or equivalent Durasensor oxygen transducer DS 100A Oxisensor II oxygen transducer D 25 Pulse oximeter tester SRC 2 Safety analyzer Must meet current AAMI ES1 1993 amp IEC 601 1 1998 specifications Sensor extension cable SCP 10 or MC 10 Serial inter
93. power up all indicators are illuminated to allow verification of their proper operation There are two sets of three 7 segment displays One set displays SpO2 and the other displays pulse rate A decimal point immediately to the right of either display indicates that an alarm limit for that parameter is no longer set at the power on default value Section 11 Technical Supplement Between the two 7 segment displays is a 10 segment blip bar The blip bar illuminates with each pulse beat The number of segments illuminated indicates the relative signal strength of the pulse beat A tone will accompany each pulse beat The sound of the tone will change pitch with the SpO2 level being measured Five LEDs and icons are also located on the Front Panel Display PCB An LED illuminated next to an icon indicates a function that is active Functions indicated by the LEDs are AC Battery Charging Low Battery Alarm Silence Motion and Pulse Search 11 9 2 Membrane Keypad A membrane keypad is mounted as part of the top case A ribbon cable from the keypad passes through the top case and connects to the User Interface PCB Six keys allow the operator to access different functions of the NPB 290 These keys allow the user to select and adjust the alarm limits cycle power to the unit and to silence the alarm Alarm volume and alarm silence duration can also be adjusted via the keypad A number of other functions can be accessed by pressing the Upper
94. r Mallinckrodt field service personnel NPB 290 Version 1 0 0 000 Error Log 14600 00 07 Op Time Error Count 10713 21 03 52 100 00634 26 01 37 3 Output Complete Figure 10 5 Error Log Printout SECTION 11 TECHNICAL SUPPLEMENT 11 1 Introduction 11 2 Oximetry Overview 11 3 Circuit Analysis 11 4 Functional Overview 11 5 AC Input 11 6 Power Supply PCB Theory of Operation 11 7 Battery 11 8 User Interface 11 9 Front Panel Display PCB and Controls 11 10 Schematics Diagrams 11 1 INTRODUCTION This Technical Supplement provides the reader with a discussion of oximetry principles and a more in depth discussion of NPB 290 circuits A functional overview and detailed circuit analysis is supported by block and schematic diagrams The schematic diagrams are located at the end of this supplement 11 2 OXIMETRY OVERVIEW The NPB 290 is based on the principles of spectrophotometry and optical plethysmography Optical plethysmography uses light absorption technology to reproduce waveforms produced by pulsatile blood The changes that occur in the absorption of light due to vascular bed changes are reproduced by the pulse oximeter as plethysmographic waveforms Spectrophotometry uses various wavelengths of light to qualitatively measure light absorption through given substances Many times each second the NPB 290 passes red and infrared light into the sensor site and determines absorption The measurements that are taken during the
95. r tone every 3 minutes be no reminder tone 2 Alarm Limit button to save the current selection Note 4 4 7 Menu Item 12 Do not use For use by Mallinckrodt Customer Service Engineer 448 Menu Item 13 Do not use For use by Mallinckrodt Customer Service Engineer The low battery audible alarm cannot be disabled 4 5 Section 4 Audible Alarm Settings and Service Menu 44 9 Menu Item 14 Calibration Signal Menu item 14 will initiate the calibration signal The calibration signal will begin at 0 0 volts DC and hold that point for 60 seconds It will then jump up to its maximum of 1 0 volt DC and hold that value for 60 seconds The third part of the calibration signal is a stair step signal The stair step signal starts at 0 0 volts DC and increases up to 1 0 volt DC in 0 1 volt increments Each increment will be held for 1 second Refer to Table 10 1 for Data port pin outs 4 6 SECTION 5 TROUBLESHOOTING 5 1 5 2 5 3 5 4 5 5 5 1 Introduction 5 2 How to Use this Section 5 3 Who Should Perform Repairs 5 4 Replacement Level Supported 5 5 Obtaining Replacement Parts 5 6 Troubleshooting Guide 5 7 Error Codes INTRODUCTION This section explains how to troubleshoot the NPB 290 Tables are supplied that list possible monitor difficulties along with probable causes and recommended actions to correct each difficulty HOW TO USE THIS SECTION Use this section in conjunction with Section 3 Performance
96. s positioned so that 1t does not come into contact with components on the Power Supply PCB 15 Reconnect W4 and WS to the battery by following the instructions in Table 6 1 16 Complete the procedure in paragraph 6 5 Section 6 Disassembly Guide 6 9 COOLING FAN REMOVAL REPLACEMENT Removal 1 Complete procedures described in 6 2 and 6 4 2 Liftthe cooling fan from the slots in the bottom case see Figure 6 7 3 Disconnect the fan wire harness from J1 on the power supply PCB Figure 6 7 Cooling Fan Replacement 4 Connect the cooling fan wire harness to J1 on the power supply PCB 5 Insert the cooling fan into the slots in the bottom case with the padded sides on the top and bottom and the fan s harness to the handle side of the case 6 Complete procedure 6 5 6 9 Section 6 Disassembly Guide 6 10 DISPLAY PCB REMOVAL REPLACEMENT Removal 1 Complete the procedure described in paragraphs 6 2 and 6 4 Caution Care must be taken when removing the Display PCB from the top case to avoid seratching the lens or LED modules 2 Gently pull the top of the Display PCB towards the inside of the instrument and lift the Display PCB up to remove it from the top case Figure 6 8 Figure 6 8 Display PCB Replacement Caution Care must be taken when installing the Display PCB into the top case to avoid seratching the lens or LED modules 3 Tilt the top of the Disp
97. tral Line Power Line IEC 601 1 AAMI ANSI Polarity Ground ES1 Standard Cable Normal Closed Closed 5 mA 50 pA Reverse Closed Closed 5 mA 50 pA Blank Page SECTION 4 AUDIBLE ALARM SETTINGS AND SERVICE MENU 4 1 Introduction 4 2 Audible Alarm Settings 4 3 Operator s Menu Options 4 4 Service Menu Options 4 1 INTRODUCTION This section discusses use of the service menu to reconfigure power on default values and how to control the behavior of the audible alarm 4 2 AUDIBLE ALARM SETTINGS The following paragraphs describe how to change the behavior of the audible alarm Operators can select the volume of the alarm and the duration of alarm silence Controls for the NPB 290 are shown in Figure 4 1 Power On Off Alarm Silence Button Button EENELLCOR PURITAN BENNETT HE Es men pam O spo A i En BB J eo AM 8 OM Od w uy w wr Upper Alarm Limit Button Adjust Adjust Lower Alarm Down Up Limit Button Button Button Figure 4 1 NPB 290 Controls 4 2 1 Alarm Silence State Press the Alarm Silence button to silence the alarm Press the button a second time to turn the alarm back on 4 2 2 Alarm Silence Duration 1 Press and hold the Alarm Silence button for less than 3 seconds 2 Before 3 seconds have passed the Adjust Up or Adjust Down button can be used to change the duration of the alarm silence The alarm duration can be set to 30 60 90 or 120 seconds
98. trend data are available for downloading to Score software for 45 days There are no limitations on displaying or printing data Caution Changing alarm limit settings uses up trend memory space Change alarm limits only as needed Note Note Trend memory always contains the MOST RECENT 24 hours of data with newly collected data over writing the oldest data on a rolling basis The NPB 290 continues to record data points as long as the monitor is powered on with blank data points collected if no sensor is connected to the monitor or patient Blank data will over write older patient data if the memory becomes full Therefore if you want to save old patient data it is important that you turn your monitor off when you are not monitoring a patient and that you download the trend memory using Score software before it fills up and over writes the old data with new data or blank data When using ScoreTM software use the latest version Contact Mallinckrodt s Technical Services Department or your local Mallinckrodt representative to determine the latest version of Score software If battery power is disconnected or depleted trend data and user settings will be lost All data is stored with error detection coding If data stored in memory is found to be corrupted it is discarded 11 9 FRONT PANEL DISPLAY PCB AND CONTROLS 11 9 1 Display PCB Visual patient data and monitor status is provided by the Front Panel Display PCB At
99. trieved from the instrument through an Instrument Info printout The Instrument Info printout when connected to a printer or PC display when connected to a PC will show the oldest deleted trend as Trend 01 If a Trend 01 already exists in memory from an earlier Delete the next deleted trend will become Trend 02 Every time a trend is deleted the number of existing trends will increase by 1 The most recently deleted trend will have the largest trend number Figure 10 3 illustrates an Instrument Info printout The first two lines are the Column Heading lines Line one is for instrument type software revision level type of printout and alarm parameter settings The second line contains the column headings A line of data is recorded for every 2 seconds of instrument operation Up to 24 hours of instrument operation data can be recorded The final line on the printout is Output Complete This indicates that data has been successfully transmitted with no corruption Ifthere is no Output Complete printed the data should be considered invalid This option is intended for Mallinckrodt field service personnel NPB 290 TIME Trend 01 01 Jul 97 14 00 00 01 Jul 97 14 00 02 01 Jul 97 14 00 04 01 Jul 97 14 00 06 NPB 290 TIME Trend 02 01 Jul 97 14 24 24 01 Jul 97 14 24 26 01 Jul 97 14 24 28 NPB 290 TIME Trend 03 11 Jul 97 7 13 02 11 Jul 97 7 13 05 11 Jul 97 7 13 07 11 Jul 97 7 13 09 11 Jul 97 7 13 11 11 Jul 97 7 13 13 11 Jul
100. ts AC Line Neutral Line Power Line IEC 601 1 AAMI ANSI Cord Cord Ground ES1 Standard Cable Closed Closed Closed 100 pA 100 pA Open Closed Open 500 pA 300 pA Section 3 Performance Verification 3 4 2 3 Patient Applied Risk Current This test is in compliance with AAMI Standard ES1 patient applied risk current and IEC 601 1 patient auxiliary current The leakage current is measured between any individual patient connection and power earth ground The applied voltage for AAMI ANSI is 120 volts AC 60 Hz and for IEC 601 1 the applied voltage is 264 volts AC 50 to 60 Hz Refer to Table 3 4 1 Configure the electrical safety analyzer as follows Function Patient Leakage Range uA 2 Connect the monitor AC plug to the electrical safety analyzer as recommended by the analyzer operating instructions for Patient Leakage Current 3 Connect the patient leakage input lead of the electrical safety analyzer to all pins of the monitor s patient cable at the end of the cable 4 The equipotential terminal is not connected to ground 5 All functional earth terminals are not connected to ground 6 Measure the leakage current between the patient connector and earth Table 3 4 Patient Leakage Current Limits AC Line Neutral Line Power Line IEC 601 1 AAMI ANSI Polarity Ground ES1 Standard Cable Normal Closed Closed 100 pA 10 uA Revers
101. urement Range SpO2 0 100 Pulse Heart Rate 20 250 bpm Accuracy SpO2 Adult 70 100 2 digits 0 69 unspecified Neonate 70 100 3 digits 0 69 unspecified Accuracies are expressed as plus or minus X digits saturation percentage points between saturations of 70 100 This variation equals plus or minus one standard deviation 18D which encompasses 68 of the population All accuracy specifications are based on testing the subject monitor on healthy adult volunteers in induced hypoxia studies across the specified range Adult accuracy is determined with Oxisensor II D 25 sensors Accuracy for neonatal readings is determined with Oxisensor II N 25 sensors In addition the neonatal accuracy specification is adjusted to take into account the theoretical effect of fetal hemoglobin in neonatal blood on oximetry measurements Pulse Rate optically derived 20 250 bpm 3 bpm Accuracies are expressed as plus or minus X bpm across the display range This variation equals plus or minus 1 Standard Deviation which encompasses 68 of the population SECTION 10 DATA PORT INTERFACE PROTOCOL 10 1 Introduction 10 2 Enabling the Data Port 10 3 Connecting to the Data Port 10 4 Real Time Printout 10 5 Nurse Call 10 6 Analog Output 10 7 Interactive Mode 10 1 INTRODUCTION The data port located at the rear of the NPB 290 provides interfacing capabilities for e printing NPB 290 data e displaying NPB 290 data on
102. ve 6 Insert the new battery into the bottom case with the negative terminal towards the bottom of the monitor 7 Install the bracket and grounding lead with the two screws 8 Complete the procedure in paragraph 6 5 9 Turn the monitor on and verify proper operation 6 5 Section 6 Disassembly Guide 6 7 POWER ENTRY MODULE PEM REMOVAL REPLACEMENT 6 6 Removal 1 Complete the procedure in paragraphs 6 2 and 6 4 2 While pushing the top of the PEM in from the outside of the case gently push the case to the outside and lift up on the PEM 3 Use needle nose pliers to disconnect the leads from the PEM see Figure 6 5 Figure 6 5 Power Entry Module Replacement 4 Refer to Table 6 1 and connect the leads to the PEM 5 Install the PEM in the bottom case with the fuse drawer facing down A tab in the bottom case holds the PEM in place Insert the bottom wing of the PEM between the tab and the internal edge of the sidewall in the bottom case Push the PEM down and towards the outside of the monitor until it clicks into place 6 Position the ground line from the PEM so that it does not come into contact with components on the Power Supply PCB 7 Complete the procedure in paragraph 6 5 Section 6 Disassembly Guide 6 8 POWER SUPPLY REMOVAL REPLACEMENT Removal 1 Complete the procedure described in paragraphs 6 2 and 6 4 2 Disconnect the leads from the battery 3 Follow the procedure in paragraph 6

NPB-290 Service Manual - Frank`s Hospital Workshop

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