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SERVICE MANUAL - Frank`s Hospital Workshop

1. J3 connector Display PCB Front panel bezel Figure 6 9 Display PCB and UIF PCB Disassembly A Using a Phillips head screwdriver remove the six screws securing the UIF PCB tothe chassis 5 Remove the Display PCB by lifting up on the mother board then pulling the Display PCB away from the UIF PCB and disconnecting from J 5 6 Disconnect the control knob ribbon cable from J 3 on the UIF PCB Push the top of the connector down then pull the cable straight up and out of the connector 7 Lift the UIF PCB out of the chassis housing 6 10 1 Installing a Replacement UIF PCB Complete the following procedure after replacing a UIF PCB L Power up in the service mode as described in paragraph 4 3 The number 5 in the SpO 2 display indicates that menu item 5 paragraph 4 3 5 has been accessed The number 07 flashes in the HEART PULSE RATE display 2 Press the UPPER ALARM LIMIT button to accept the ICC value of 07 indicating that the unit is an SpO2 unit with ECG capabilities 3 Turn the unit off The N 3000 is ready for normal operation 6 9 Section 6 Disassembly Guide A Replacethe Instrument Identification label by attaching it to the enclosure on the bottom of the unit Confirm the IID number using the service mode menu item 17 6 11 CONTROL KNOB ASSEMBLY REPLACEMENT 1 Complete the procedurein paragraph 6 10 The top cover appears as illustrated in Figure 6 10 Heat shield
2. 5 The docking connector cable is plugged into connector J 13 on the UIF PCB Disconnect the docking connector cable from connector J 13 by gently pushing the top of the connector down while pulling straight up on the cable 6 5 1 Communications Board Switch Settings 1 To change the switch settings on your communications PCB complete steps 1 through 4 in paragraph 6 5 2 The switch settings on the Communication PCB are shipped for RS 232 communications and should be as follows refer to Figure 6 5 SW1 Positions 1 3 5 and 7 ON Positions 2 4 and 6 OFF SW2 Positions 2 4 and 6 ON Positions 1 3 5 and 7 OFF SW3 Position 1 ON Position 2 3 and 4 OFF J umper J 6in IGN D position 6 5 Section 6 Disassembly Guide If a continuous 3 3 volt signal at pin 6 of the serial port Figure 3 3 is required as when using the SOC 3 adapter change the SW3 settings as follows SW3 Position 1 OFF Position 2 3 and 4 ON If RS 422 settings are required change SW1 and SW2 as follows SW1 Positions 1 3 5 and 7 OFF Positions 2 4 and 6 ON SW2 Positions 2 4 and 6 OFF Positions 1 3 5 and 7 ON SW3 Position 1 ON Position 2 3 and 4 OFF 6 6 REMOVING THE ALARM SPEAKER 1 Complete the procedure in paragraph 6 5 2 Remove the handle and spring assembly on the right side of the unit as illustrated in Figure 6 6 lifting it up out of the molded chassis cradle Handle Spring Lef
3. Connector Module cations Battery Module Display Module Visual Annunciators and Controls Figure S4 1 N 3000 Functional Block Diagram 4 2 Circuit Description 4 2 1 SpO2 Module SA The following paragraphs discuss the operation of each of the printed circuit boards within the N 3000 oximeter Refer to the appropriate schematic diagram at the end of this supplement as necessary a Isolated Power Supply Transformer T1 and associated components comprise the isolated power supply circuitry of the SpO2 module see sheet 1 of the schematic diagram This power supply is a pulse width modulated current mode switching supply In this circuitry controller U4 is synchronized to a programmable clock frequency ANALOG CLK U4 pin 4 Timing for the isolated circuitry is derived from the switching frequency of the power supply hence ANALOG CLK is used to control front end aliasing If no ANALOG CLK signal is available R13 and C8 provide a default timing circuit for the U 4 controller Two parallel FETs Q7 drive the T1 transformer in flyback mode channeling the current through sense resistors R23 and R133 Any inductive spike created by the leakage inductance of the T1 transformer is filtered out of the circuit by R105 and C9 Feedback for the U4 controller is optocoupled through one half of U34 This controls the circuit pulse width which also maintains the isolated VCCI at 5 volts Components R68 R69 R70 C45
4. Format 2 in the N 3000 operator s manual Section 4 Configuration Mode Service Mode and Alarm Active Function Selecting 10 causes patient trend data to be recorded every 10 seconds Each patient parameter value will be the average of all data samples for each parameter during the sample period Data is stored for the most recent 24 hours of patient monitoring This selection is described as Format 1 in the N 3000 operator s manual Selecting 5 causes patient trend data to be recorded every 5 seconds Each patient parameter value will be the most recent data sample for each parameter during the sample period Data is stored for the most recent 12 hours of patient monitoring This selection is described as Format 3 in the N 3000 operator s manual 1 From the configuration menu steady state rotate the knob until 4 is displayed in the SpO02 display Press the UPPER ALARM LIMIT button A 5 10 or 20 is displayed in the HEART PULSE RATE display Rotate the knob to display the desired default trend type 3 Press the LOWER ALARM LIMIT BUTTON to return tothe configuration menu steady state 4 2 8 6 Reset to Factory Defaults Menu item number 5 allows you to reset all default settings to the original factory settings as listed in paragraph 9 6 Factory Default Settings of the Specifications section 1 From the configuration menu steady state rotate the knob until 5
5. Fuses External Power Supply Model SPS I1 Model SPS N1 Patient Applied Waveforms Leads Off Sensing Active Noise Suppression Rechargeable sealed lead acid internal 4 hours minimum on full charge when operating standalone 2 hours minimum when attached to an N 3100 blood pressure monitor 14 hours for full charge 6 hours for 1 hour of operating time 15V DC F1 1 0 A 250V Slo Blow F2 2 5 A 250V Slo Blow AC input 100 240V 500 mA maximum 50 60 Hz AC input 100 120 VAC 500 mA maximum 50 60 Hz DC None 1 Section 9 Specifications 9 3 PHYSICAL CHARACTERISTICS Dimensions 6 8 cm x 23 9 cm x 14 7 cm 2 65 in x 9 41 in x 5 79 in Note When operating without the docking pedestal docked the height is 5 4 cm 2 13 in instead of 6 8 cm 2 65 in Weight 1 8 kg 3 96 Ib 9 4 ENVIRONMENTAL Operating Temperature 5 to 40 C 41 F to 104 F Storage Temperature 40 to 70 C 40 F to 158 F Operating Altitude 396m to 43 139m 1 300 ft to 10 300 ft Relative Humidity 15 RH to 95 RH noncondensing 9 5 ALARMS Alarm Limit Range Saturation 20 100 Heart Pulse Rate 30 250 bpm 9 6 FACTORY DEFAULT SETTINGS Factory Default Alarm Settings Adult Neonate SpO 2 Upper Alarm Limit 100 95 SpO 2 Lower Alarm Limit 85 80 Heart Pulse Rate Upper Alarm Limit 170 bpm 190 bpm Heart Pulse Rate Lower Alarm Limit 40 bpm 90 bpm General Factory Default Settings
6. Digital to Analog Converter DAC U5 is an 8 bit converter used by the processor to control speaker volume It is a write only memory mapped peripheral connected to the upper 8 bits D15 through D8 of the processor data bus It converts the 8 bit data value written into it by the processor to control the amplitude of the square wave generated by processor output OC2 Technical Supplement The resultant amplitude controlled square wave is then sent to audio amplifier U4 to drive the 8 ohm speaker The chip select for U5 is processor pin CS5 Analog to Digital Converter ADC U27 is an 8 bit analog to digital converter used by the processor to measure three different analog voltages It is a read only memory mapped peripheral connected to the upper 8 bits D15 through D8 of the processor data bus The analog voltage values indicate which display board button has been pressed what the combined voltage of both lithium batteries is and the value of the analog voltage being supplied from transistor Q10 to the SpO2 module and 5V regulator chips U17 and U18 The chip select for U5 is processor pin CS7 The selection of analog voltages to read is controlled by processor outputs PWMA and PWMB which must be set up prior to accessing U27 Stackbus Adapter Adapter U14 is an FPGA field programmable gate array used by the processor to control the hub functions for both the internal and external stackbus It also decodes the knob movement as
7. Encoder assembly Top cover Figure 6 10 Knob Encoder Disassembly Turn the cover right side up as illustrated in Figure 6 11 and usea small flat blade to gently pry the knob off the shaft When removing the knob in this manner care must be taken not to nick and dent the surrounding top cover Nut Metal washer Elastomeric washer Figure 6 11 Knob Disassembly 6 10 Section 6 Disassembly Guide Using a 7 16 inch socket remove the nut securing the shaft and knob assembly to the chassis Replace the control knob assembly with the elastomeric washer closest to the plastic chassis Torque nut to 10 inch pounds Replace the heat shield and white plastic insulator as illustrated in Figure 6 10 6 12 LITHIUM BATTERY REPLACEMENT 6 13 REASSEMBLY 1 2 Disconnect AC line voltage from the monitor With the monitor upside down and facing you open up the chassis as shown in Figure 6 5 Locate the lithium batteries on the UIF PCB Figure 6 9 The backup lithium battery the larger of the two lithium batteries is used to supply backup power to the UIF processor if the lead acid battery fails during DC use It also supplies power to the piezo power loss alarm speaker during a microprocessor or power failure alarm The other Smaller battery provides additional voltage to power the piezo speaker Slide battery or batteries from underneath the spring clips Do not dispose of lithium batteries by placing them
8. Read the RCAL standard representation of the nominal sensor resistance in the HEART PULSE RATE display If connected to an SRC 2 tester set the SRC 2 RCAL Mode switch to 63 The RCAL value 63 is displayed in the HEART PULSE RATE display Set the SRC 2 RCAL Mode switch to 64 The RCAL value 64 is displayed in the HEART PULSE RATE display 419 Section 4 Configuration Mode Service Mode and Alarm Active Function 5 Press the LOWER ALARM LIMIT button to return to the service mode steady state 4 3 19 Menu Item 31 SpO2 IR and Red Offset Report This function allows you to validate the operation of the SpO2 module The values represent the DC voltage offset for the current amplifier gain when the amplifier inputs are zeroed 1 Connect the sensor cable and SRC 2 to the N 3000 2 Set the SRC 2 as follows SWITCH POSITION RATE 38 LIGHT LOW MODULATION OFF MODE LOC RCAL 63 3 From the service mode steady state select menu item 31 by rotating the knob until 31 appears in the Sp02 display Press the UPPER ALARM LIMIT button The SpO2 IR offset appears in the SpO 2 display and the SpO2 red offset appears in the HEART PULSE RATE display The values are displayed in millivolts 4 Pressthe LOWER ALARM LIMIT button to return to the service mode steady state 4 3 20 Menu Item 32 SpO2 Corrected IR and Red Signals Report 420 This function allows you to validate the operation of the SpO2 module The values
9. class error entry is madein the Error Log These errors do not appear on the display or cause an alarm They are entered in the Error Log These errors represent events that have occurred in the instrument that are undesirable but for which their is an effective means of recovery This includes such things as watchdog resets data stream restarts due to data under run or stoppage and resource exhaustion An EEE Oxx code representing the failure is displayed and a low priority alarm sounds but no entry is made in the Error Log These errors represent hardware failure conditions that can be corrected by the user such as replacing a faulty sensor or cable They are not logged because they are caused by equipment external to the N 3000 They are readily identified by the 0 leading digit in the error number displayed along with EEE failure errors have a leading digit other than 0 This results in a shrill pulsing alarm sound Nothing is logged in the Error Log and the display is blank because the primary power in the instrument has failed This alarm is powered by the secondary back up lithium batteries located on the UIF PCB Appendix In all cases an attempt to store an error in the Error Log may fail due to failure or corruption of the Error Login EEPROM This condition alone does not constitute a failure error and operation of the instrument proceeds as if the error has been successfully logged A2 USER CORRECTABLE ERROR CODES
10. 3 3 6 2 ECG Cable Off and Lead Off Tests This procedure verifies the ECG cable off detect circuitry The leads must be connected to a patient or patient simulator test circuit to produce a leads on indicator OF F indicates that the leads are off ON indicates that the leads are on 1 2 10 11 12 13 14 15 Connect ECG electrodes to the patient Connect a Ndlcor Puritan Bennett SCE 10 ECG cable to the N 3000 Connect Ndlcor Puritan Bennett ECG leads to the cable Connect the ECG leads to the electrodes on the patient according to the leads directions for use Enter the service mode as instructed in paragraph 4 3 From the service mode steady state select menu item 45 by rotating the knob until 45 appears in the Sp02 display Press the UPPER ALARM LIMIT button The HEART PULSE RATE display should display ON indicating that the cable is attached Disconnect the cable from the N 3000 The HEART PULSE RATE display should display OFF indicating that the cable is not attached Reconnect the cable to the monitor Connect an SLE lead to the cable Press the LOWER ALARM LIMIT button to return to the service mode steady state From the service mode steady state select menu item 46 by rotating the knob until 46 appears in the Sp02 display Press the UPPER ALARM LIMIT button The HEART PULSE RATE display should display ON indicating that the leads are
11. Dump EEPROM Data 418 This function allows you to dump the entire contents of the EEPROM toa serial data capture device This data may then be transmitted to Nellcor Puritan Bennett to assist in diagnosing the condition of the instrument Note The N 3000 must be operating from AC power to perform this menu item 1 Turn the N 3000 off 2 Connect the N 3000 toa PC through the serial port 3 Execute your communication software application Port settings should be set as indicated below Baud Rate 19 200 or equivalent to N 3000 setting as determined by using menu item 60 Parity N Data Bits 8 Stop Bits 1 4 Power on the N 3000 and place it in the service mode steady state 5 Select menu item 25 by rotating the knob until 25 appears in the SpO 2 display Press the UPPER ALARM LIMIT button EE will be displayed in the HEART PULSE RATE display 6 Press the PRINT button to transmit the contents of the EEPROM memory out of the serial port 7 Section 4 Configuration Mode Service Mode and Alarm Active Function Press the LOWER ALARM LIMIT button to return to the service mode steady state 4 3 16 Menu Item 28 Enable Disable Battery Charge Circuit This test allows you to turn the battery charging circuit on or off 1 From the service mode steady state select menu item 28 by rotating the knob until 28 appears in the Sp02 display Press the UPPER ALARM LIMIT button Observe the battery charg
12. The error codes listed in Table A 2 are user correctable Table A 2 N 3000 User Correctable Error Codes Error Code Explanation Current user input values limits volumes times have been lost during an internal reset and the unit has returned to Wa power on defaults Alarm and beep volume audible alarm silence duration and operating mode have returned to power on defaults due to an internal instrument reset S limits have been reset to their power on default due to Sar corruption in the ECG module ees Cannot calibrate sensor A3 FAILURE ERROR CODES Table A 3 lists the possible failure error codes in numerical order Table A 3 N 3000 Failure Error Codes ao tno wtapetston UIF unknown POST failure typically processor derail or memory corruption during POST UIF startup problem missing resource or unexpected state during module initialization Unable to complete operation Institutional parameters are in unknown state A 2 A4 Appendix Table A 3 N 3000 Failure Error Codes Continued select jumper and digital board to analog board connection module or SE receiver broken a Wee center O OOOO The firmware and ECG PCB donot match or the PCB board presence is not recognized PROM on ECG board may be wrong version ECG module self test failure 376 ECG board software unable to write user or factory defaults into the power on defaults INTERNALLY CORRECTED ERROR CODES Inte
13. based upon a CPU clock speed of 16 0 MHz maximum and the U4 access time of 150ns maximum Technical Supplement Resistor R22 pulls the U4 OE signal state to low during normal operation If this signal state is high the U4 output is disabled C RAM Memory RAM chips U5 and U8 provide the ECG Controller board with 256K bytes of memory The 16 bit RAM data bus is split into a high byte and a low byte for RAM chips U5 and U8 respectively High byte RAM U5 is output enabled when the R W L lines from U1 is set high and the HRAMENLL line from U1 CSO is set low Low byte RAM U8 is output enabled when the R W L line from U1 is set high and the LRAMEN L line from U1 CS2 is set low Both RAM chips are write enabled when the R W L line from U1 is set low d Stackbus The SpO2 controller board also communicates with other boards within the N 3000 via the stackbus The stackbus is controlled by the COM 20020 Arcnet controller chip U6 which is enabled by U1 CS1 CS1 must be configured as a chip select with a start address of 60000h block length of 2k 8 bit port both bytes access both read and write access and gated with AS This configuration maps the stackbus in the memory range of 60000h through 607F Fh The number of wait states to generate depends on the U1 clock speed The number of wait states for CS1 must be set to 2 based upon a CPU clock speed of 16 0 MHz e Analog Interface The ANALOGO to ANALOGS signal lines are used as
14. configuration mode steady state You may also exit by turning the monitor off 4 2 8 1 Pulse Tone Volume Menu item number 0 allows you to determine the default volume 1 through 10 for the pulse tone 1 From the configuration menu steady state rotate the knob until O is displayed in the SpO2 display Press the UPPER ALARM LIMIT button 2 The current default pulse tone volume setting is displayed in the HEART PULSE RATE display An audio tone sounds at the current volume setting Rotate the knob CW or CCW to display the desired power on default volume level 1 through 10 3 Press the LOWER ALARM LIMIT BUTTON to return tothe configuration menu steady state 45 Section 4 Configuration Mode Service Mode and Alarm Active Function 4 2 8 2 4 2 8 3 4 2 8 4 4 2 8 5 46 UIF Software Version Report 1 From the configuration menu steady state rotate the knob until 1 is displayed in the SpO02 display Press the UPPER ALARM LIMIT button The UIF software version number is the left most digit in the Sp02 display The next two digits in the Sp02 display represent the major software revision number The minor software revision number is displayed in the HEART PULSE RATE display Press the LOWER ALARM LIMIT BUTTON toreturn tothe configuration menu steady state SpO2 Software Version Report 1 From the configuration menu steady state rotate the knob until 2 is displayed in the SpO02
15. display Press the UPPER ALARM LIMIT button The SpO2 software version number is the left most digit in the Sp02 display The next two digits in the Sp02 display represent the major software revision number The minor software revision number is displayed in the HEART PULSE RATE display Press the LOWER ALARM LIMIT BUTTON toreturn tothe configuration menu steady state Serial Port Baud Rate Trend Type 1 From the configuration menu steady state rotate the knob until 3 is displayed in the SpO02 display Press the UPPER ALARM LIMIT button The current baud rate in thousands is displayed in the HEART PULSE RATE display To change the default baud rate setting rotate the knob until the desired setting is displayed Baud rates available are 1 2k 2 4k 9 6k 19 2k and 38 4k Note Baud rates should not exceed 19 200 in RS 232 mode use EIA 422 mode Refer to paragraph 6 5 1 to change the communication mode settings Press the LOWER ALARM LIMIT button to return to the configuration menu steady state Menu item number 4 allows you to select 5 10 or 20 displayed in the SpO 2 display as the default trend format Selecting 20 causes patient trend data to be recorded every 20 seconds Each patient parameter value will be both the maximum and minimum data for each parameter during the sample period Data is stored for the most recent 24 hours of patient monitoring This selection is described as
16. follow the instructions in Section 6 Disassembly Guide The circuit analysis section in the 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 Nellcor Puritan Bennett Technical Services or your local Nellcor Puritan Bennett 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 PCB follow the procedures in Section 6 Disassembly Guide to replace the PCB with a known good PCB Check to see if the trouble symptom disappears and that the monitor passes all performance tests If the trouble 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 Nellcor Puritan Bennett Technical Services provides technical assistance information and replacement parts To obtain replacement parts contact Nellcor Puritan Bennett or your local Nellcor Puritan Bennett representative Refer to parts by the part names and part numbers listed in Section 7 Spare Parts 51 Section 5 Troubleshooting 5 6 TROU
17. is displayed in the Sp02 display 2 Pressthe UPPER ALARM LIMIT button to reset to factory defaults Three beeps indicate that all configurable power on default parameters except latching alarms and alarm silence reminder enable are set to their factory default values You are automatically returned to the configuration menu steady state 4 2 8 7 Primary Heart Pulse Rate Source Menu item number 6 allows you to select the default primary heart pulse rate source Selecting SPO causes the pulse rate measured by an SpO2 sensor to be used as the primary source displayed in the HEART PULSE RATE display Selecting ECG causes the heart rate measured by ECG leads to be used as the primary source displayed in the HEART PULSE RATE display 1 From the configuration menu steady state rotate the knob until 6 is displayed in the SpO02 display Press the UPPER ALARM LIMIT button 2 The current primary heart pulse rate source is displayed in the HEART PULSE RATE ECG indicates that the primary source is the heart rate as measured with the ECG leads SPO indicates that the primary source is the pulse rate as measured by the SpO2 sensor To change the default setting rotate the knob until the desired setting is displayed 3 Press the LOWER ALARM LIMIT button to return to the configuration menu steady state 47 Section 4 Configuration Mode Service Mode and Alarm Active Function 4 2 8 8 4 2 8 9 Pu
18. rotate the knob until the desired setting is displayed 3 Press the LOWER ALARM LIMIT button to return to the configuration menu steady state 4 2 8 12 ECG Software Version Report 4 3 SERVICE MODE 1 From the configuration menu steady state rotate the knob until 11 is displayed in the SpO02 display Press the UPPER ALARM LIMIT button 2 The ECG software version number is the left most digit in the Sp02 display The next two digits in the Sp02 display represent the major software revision number The minor software revision number is displayed in the HEART PULSE RATE display 3 Press the LOWER ALARM LIMIT BUTTON to return tothe configuration menu steady state The service mode allows the technician to go through a series of tests to determine monitor functionality and to access the error log report The service modes cannot be accessed by the N 3000 while it is stacked with an active N 3100 or N 3200 If operating in the stacked configuration disconnect the N 3000 from other instruments or turn the other instruments off before entering the service mode Use the following procedures to place the monitor into the service mode 1 Ifthe monitor is on turn it off 2 While simultaneously holding down the UPPER and LOWER ALARM LIMIT buttons and the PRINT button press and release the ON STANDBY button Continue to press and hold the UPPER and LOWER ALARM LIMIT and PRINT buttons while the monitor performs the power
19. 0 cccccccssccecessneceeee ceeeeecnaeeeeceaeeeseceeeeseae eases A 2 A4 Internally Corrected Error Codes ccesceeeeceeceeeeeeeeeneeeneeeeees A 3 Technical Supplement S 1 S1 eieiei en NET S 1 S2 Oximetry Overview occ ceececeeeeeeeeteeeee ceeeeaeecaeeeaaeeesaeesaeeeene renent S 1 2 1 Automatic Calibration 0 cccccccessseeeeeees ceeeeesssteeeeeees S 1 2 2 Functional Versus Fractional Saturation 0 100 S 2 2 3 Measured Versus Calculated Saturation 00 10010ee S 2 S3 Stackbus Interconnerct ce eeeeeeeeeceseeeeeee ceaeeeeaeeeseaeeeaeeseeeeetaees 2 Zack Circ t Ana VSS eebe ee a aaa aa heathen aaa S 3 S4 1 Functional Overview cccccccccsssecesssee cessneeeeesneeeeeees S 3 4 2 Circuit DeScriptlOnicrecsecsieastebbeateakllssteceeadinn baste G A 84 2 1 SpO2 Module 0 eee eeceeeceeeeeeeeeee ceeeeeeeeeseeeesaeeseeeeeaes G A S4 2 2 ECG Module EAR S 7 84 2 3 UIF Module 00 0 eeeceeeeeceeeeceeeee caeeeeee scene seeeesneeseaeeneae m S 8 4 2 4 SpO2 Controller igri egean aaa a aaan eaS S 15 4 2 5 ECG Controller cccecccccessceceeee ceeesseeeeeseeeesseeeeeaas S 17 4 2 6 Communications Submodule cette S 18 84 2 7 Display Board S 20 S 5 Schematic Diagrams rekri anaa aa etaan aa aa aeiaai a S 21 1 1 N 3000 Front Panel International 2 0 0 eeeseeeeeeeeeeeeeeneeeeeeaes 1 2 1 2 N 3000 Front Panel North American A 1 2 3 1 Self Test Display A 3 3 3 2 Serial Port I
20. 13 Lee i Ko Ss t ECG controller PCB 14 a 7 Grounding clips 34 ec i 7 g clips 34 i 8 e Top cover 15 Audible alarm off button 35 Wo lt O J Display PCB 16 Optical encoder assembly 23 SpO2 rubber gasket 37 Alarm limit buttons 21 Control knob 22 ON STDBY and PRINT buttons 19 20 Right panel 24 25 ECG insulator 39 Figure 7 1 N 3000 Expanded View 7 3 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 the Nellcor Puritan Bennett warranty If the original shipping carton is not available use another suitable carton North American customers may call Nellcor Puritan Bennett Technical Services to obtain a shipping carton Prior to shipping the monitor contact your supplier or the local Nellcor Puritan Bennett office Technical Services Department for a returned goods authorization number Mark the shipping carton and any shipping documents with the returned goods authorization number 8 2 REPACKING IN ORIGINAL CARTON If available use the original carton and packing materials Pack the monitor as follows 1 Placethe monitor and if necessary accesso
21. 3 4 Safety Tests 3 5 SpO2 Tests 3 6 Piezo Speaker Test SECTION 3 PERFORMANCE VERIFICATION This section discusses the tests used to verify performance following troubleshooting and repairs All tests are accomplished through the control panel EQUIPMENT NEEDED Equipment AC power adapter Safety analyzer Sensor cable Digital multimeter DMM Durasensor oxygen transducer Serial interface cable Connector adapter Oxisensor SI oxygen transducer Pulse oximeter tester ECG cable ECG leads ECG electrodes ECG tester PERFORMANCE TESTS Description SPS N1 or SPS I1 Must meet current AAMI specifications SCP 10 Fluke Mode 87 or equivalent DS 100A El A 232 cable optional 6 pin miniature D 25 SRC 2 SCE 10 SLE series Note Thebattery operation and battery charge tests should be performed before monitor repairs whenever the battery is suspected of being a source of the problems All other tests should be performed following monitor repairs Before performing the battery operation test ensure that the battery is fully charged paragraph 3 3 2 31 Section 3 Performance Verification 3 3 1 Battery Operation Test 3 3 2 Battery Charge 32 The monitor is specified to operate on battery power a minimum of 4 hours This time may decrease if the N 3000 is operating in the stacked configuration with an N 3100 or N 3200 L Connect the NdIcor Puritan Bennett SRC 2 pulse oximeter tester to th
22. 6 6 7 Removing the SpO2 PCB and SpO2 Controller DCH 6 6 6 8 Removing the Communications DCH 6 7 6 9 Removing the ECG PCB and ECG Controller DCH 6 8 6 10 Removing the UIF PCB and Display DCH 6 8 6 10 1 Installing a Replacement UIF PCB necces 6 9 6 11 Control Knob Assembly PHepnlacement eee 6 10 6 12 Lithium Battery Replacement AA 6 11 6 13 REASSEMDIY et cocccivesseeeilcyeeebide deeebbcadt ext rietebyedintexbieyieeeileaeebbeas 6 11 Section 7 Spare Parts 7 1 7 1 jalina eltt iag EE 7 1 Section 8 Packing for Shipment A 8 1 8 1 General INStruUCtiONS n tirsir ipinnu eraan dees entity aiaia 8 1 8 2 Repacking in Original Carton ceeccceeeeeeeeeeeeceeeeteeeeeaeeeeneeees 8 1 8 3 Repacking in a Different Carton 0 cecceeeseeeeeeeee rerrresrrssresns 8 2 Table of Contents LIST OF FIGURES vi Section 9 Specification ineei ian iaiia teni iiaa e laad aiaei dapa 9 1 9 1 Generalerna aa een 9 1 EN ene NEE 9 1 9 3 Physical Characteristics ccccccceeeceeeeeeeeceeeeeeeeseeeessaeeseeeeeaes 9 2 9 4 Environmental sic cu a ttt een Eeer 9 2 9 54 E EE EE dee EE 9 2 9 6 Factory Default Settings 00 ccceeeececeseeeeeee ceeeeceeeeeeaeeeeeeeeeeeees 9 2 9 7 Pertommmance see eeece cece ee eeeeeee ce cree eecenaeeeeeeeeeeaaaeaeeeeees ceaaeaeeeeeetees 9 3 e EE A 1 Al Error TYPOS ees isis oede ged eg e dane eed en eg Bee gies A 1 A2 User Correctable Error Codes caeeeeeeeeeeeeaeees A 2 A3 Failure Error Codes
23. 93 bom Heart Rate Response Time Minimum response time 7 sec Change in Heart Rate from 80 Maximum response time 8 sec bpm to 120 bpm Average response time 7 5 sec Change in Heart Rate from 80 bpm to 30 bpm Minimum response time 7 sec Maximum response time 9 sec Average response time 8 sec Time to Alarm for Tachycardia The following are the times to alarm for tachycardia for the test waveforms of AAMI EC13 Figure 4 a Ventricular Tachycardia Average Time Amplitude to Alarm 0 5 mV 1mV 2 mV The following are the times to alarm for tachycardia for the test waveforms of AAMI EC13 Figure 4 b Ventricular Tachycardia Average Time Amplitude to Alarm 1mvV 2 mV 4 mV Section 9 Specifications Pacemaker Pulse Rejection Capability The following pacemaker pulses without over undershoot will be rejected by the N 3000 acemaker Pulse Pacemaker Amplitude Pulse Width 0 1 and 2 0 msec 700 mV 0 1 and 2 0 msec The following pacemaker pulses with over undershoot will be rejected by the N 3000 The over undershoot recharge time constant is 6 milliseconds Over undershoot Pulse Amplitude Pulse Width Amplitude lt 05 mv S05 mV ECG Lead ID Right arm RA International Red North American White Left arm LA International Yellow North American Black Left leg LL International Green North American Red ANSI AAMI EC 13 Standard The N 3000 meets the EC
24. LIMIT button The current baud rate in hundreds is displayed in the HEART PULSE RATE display To change the default baud rate setting rotate the knob until the desired setting is displayed Note When connected toa PC in the RS 232 format a baud rate above 19 200 should not be used Press the UPPER ALARM LIMIT button to store the default setting Press the LOWER ALARM LIMIT button to return to the service mode steady state 4 3 38 Menu Item 61 Serial Port Loop Back Test This test verifies that when the N 3000 is connected to a PC through the N 3000 serial port the serial port receive hardware is functional Note The N 3000 must be operating from AC power to perform this menu item Turn the N 3000 off Connect the N 3000 toa PC through the serial port Execute your communication software application Port settings should be set as indicated below Baud Rate 19200 or as set using menu item 60 Parity N Data Bits 8 Stop Bits 1 Turn on the N 3000 and place it in the service mode Select menu item 61 by rotating the knob until 61 appears in the SpO 2 display Press the UPPER ALARM LIMIT button Type any characters on your PC keyboard and verify that the characters are echoed on the PC screen This confirms that data received on the serial port receive line is transmitted on the transmit data line Press the LOWER ALARM LIMIT button toreturn to the service mode steady state 428 Section 4 Configurati
25. PCO2 2 3 DPG and fetal hemoglobin __ pH 100 Temperature be 7 De PCO2 D 2 3 DPG Fetal Hb i ns a S 2 E bh L pH 2 en Se S t Temperature P bh t PCO2 f t 2 3 DPG G 7 0 50 100 PO2 mmHg Figure S2 1 Oxyhemoglobin Dissociation Curve 3 STACKBUS INTERCONNECT S 2 Stackbus is the general term for the communication interconnect between the N 3000 modules and also between the N 3000 N 3100 and N 3200 instruments The internal stackbus is used for communications between the UIF PCB and the SpO2 module Information is transmitted over a single PCB trace using the Arcnet discussed in paragraph S4 Circuit Analysis local area network standard as the message protocol The external stackbus is used for communications between the N 3000 N 3100 and the N 3200 Information is exchanged over two pins on the N 3000 docking connector and two sockets on the N 3100 or N 3200 upper docking connector As with the internal stackbus the Arcnet local area network standard is used as the protocol Technical Supplement RS 485 drivers and receivers are used for signaling A proximity sensor in the bottom of the N 3000 or N 3100 detects when the monitor is docked enabling the stackbus signals Access to the stackbus is accomplished through token passing A token designates which station module or instrument has control of the stackbus The token is passed in a circular manner from stat
26. Peripheral ICs Processor U3 uses serial and parallel peripheral ICs The serial peripheral ICs communicate with the processor through the 68331 Queued Serial Module QSM These ICs are the Real Time Clock RTC the Electrically Erasable Read Only Memory EEROM and the display controllers located on the Display PCB The parallel peripheral ICs communicate with the processor through a non multiplexed data bus The ICs are processor code PROM U10 processor RAMs U13 and U23 Arcnet communications IC U6 digital to analog converter U5 analog to digital converter U27 stackbus adapter U14 BQ2001 power management chip U20 and UART Universal Asynchronous Receiver Transmitter U 24 Real Time Clock The clock is a continuously running IC used by the processor to maintain time and date information When the N 3000 is not on the RTC is maintained by lithium backup battery BT1 Electrically Erasable Read Only Memory The EEROM is used by the processor to store institutional defaults and system error code data Technical Supplement Display Controllers These controllers are used by the processor to display data on the display board Processor Code PROM U10 The PROM contains the program that the processor uses to perform the user interface and gateway functions for the N 3000 Processor U3 address lines Al through A17 are connected to PROM addresses AO through A16 allowing even word address access to the PROM To allow the u
27. Pin Locations Table 3 1 Serial Port Voltages Pin Line Voltage 4 GND Logo Alarm Active 0 0 0 4 or 3 3 0 4 Allows alarm activity to be monitored from a location away from the N 3000 refer to paragraph 4 4 Connections between the N 3000 serial port and an external PC are as indicated in Figure 3 4 2 1 TE 6 ALARM ACTIVE Spares Shield Shield connected to shell Figure 3 4 N 3000 to External PC Connections Section 3 Performance Verification 3 3 6 5 ECG Cable Test The following test should be completed after defibrillation has been performed on a patient attached to ECG leads and a Ndlcor Puritan Bennett SCE 10 ECG cable Perform the following procedure to test the ECG cable 1 Disconnect the SCE 10 ECG cable from the N 3000 and the ECG leads Pin locations for both ends of the ECG cable are identified in Figure 3 5 e e e D F N 3000 Connector ECG Lead Connector Figure 3 5 ECG Cable Pin Locations 2 Measure the resistances between the pins as indicated in Table 3 2 Table 3 2 ECG Cable Resistances Pin ToPin Resistance 3 B 900 1100ohms 8 c Long Ooops 3 Ifthe resistances are not as indicated replace the cable 3 4 SAFETY TESTS N 3000 safety tests consist of e Ground Integrity e Electrical Leakage 3 17 Section 3 Performance Verification 3 4 1 Ground Integrity 3 4 2 Electrical Leakage Thi
28. Port Baud Rate ccceeseceeseceeeeee ceeeeeeeeeeeeeees 4 2 3 5 Trend TYPE skierien a ciate dee 4 2 8 6 Reset to Factory Defaults AAA 4 2 8 7 Primary Heart Pulse Rate Source n 4 2 8 8 Pulse Tone Gource ceeeeeeseaeeeeeeeeaes 4 2 8 9 ECG Lead Gelechon ceeeeeneeeeeesenees 4 2 8 10 ECG Pacer Filter Status cccceeeeceeeeeeeeeceeeeneeeeeees 4 2 8 11 ECG Extended Low Frequency Filter Status 4 2 8 12 ECG Software Version Heport eee 43 Service Modessa rerin ae aie eda bebe ain Aa tes 4 3 1 Menu Item 1 Software Version Report s es 4 3 2 Menu Item 2 Knob and Lamp Test aaaeneneeeeeen 4 3 3 Menu ltem 3 Button Test eeceeeeeeeeesiee rreren 4 3 4 Menu Hem 4 Speaker Test 4 3 5 Menu Item 5 Internal Configuration Code ICC FROPOM Sevcverccistoter a A R a 4 3 6 Menu Item 6 Total Operating Hours Henort 4 3 7 Menu Items 7 16 Error Log Record Report 4 3 8 Menu Wem 17 Instrument Identification IID Report 4 3 9 Menu Item 18 Power Status cccceeeeeeeeeee eee 4 3 10 Menu Item 19 Persistent Time Sense Report 4 3 11 Menu Item 20 Reset to Factory Defaults 10000010a 4 3 12 Menu Item 21 Initial Cluster Instrument Number ROPO ecese asena eee ee ta ce ee Gefreet 4 3 13 Menu ltem 22 Latching Alarms AA 4 3 14 Menu Item 23 Enable Disable Alarm Silence Elle TEE 4 3 15 Menu Item 25 Dump EEPROM Data 4 3 16 Menu Hem 28 Enable Disable Battery Charge
29. Switch U3 is used with U2 to selectively ground the inputs to the unity gain amplifiers d Lead Off Detector Circuit The outputs of the three unity gain amplifiers parts of U 1 are applied to a summing amplifier another part of U 1 When one or more of the ECG leads come off the summing amplifier causes a phototransistor part of U 7 to conduct and pull the LEAD_OFF line low to provide the ECG controller with an indication that an ECG lead has come off the patient e Servo Amp Circuit The servo amp circuit provides the final conditioning of the electrically isolated ECG signal that is optically coupled to U 19 to produce RAW_ECG The output of solid state switch U2 is connected to differential amplifier U4 which produces a combined signal from the individual ECG lead signals The combined signal is AC coupled to an amplifier in U5 which drives part of photocoupler U8 The output of this amplifier is then applied to another amplifier in U5 which drives transistor Q2 which drives another part of photocoupler U8 The output of U8 is amplified by an amplifier in U19 the S 7 Technical Supplement 4 2 3 UIF Module S 8 output of which is the RAW_ECG signal which is applied to the E CG lead 10101 display and the pacemaker detection and suppression circuits L ECG Lead I II II Display Circuit The RAW_EGG signal from the servo amp circuit is connected to an amplifier in U19 When the ECG_REST line goes low a 2 5 volt DC reference
30. U13 converts the current output of the linear opto isolator U6 to a voltage and then toa digital value g Auto Calibration Switch U26 selects either the differential amplifier U21 output or the internal calibration signals as an input to the U27 based filter If the calibration input is selected U24 can select either a zero or test input The zero input connects the filter input to ground so the system can calibrate the no signal output of the two channels The test input connects the LED current waveform to the filter so the demodulator has an output proportional to the programmed LED current h Nonisolated Power Supply The power supply creates 5 volt from the system battery supply The input voltage is 8 16 volts which is filtered and regulated by U 19 to create the 5 volts U 20 converts this input to a regulated 7 volt output that is regulated to 5 volts by U 18 4 2 2 ECG Module Technical Supplement The following paragraphs describe the functional areas of the ECG PCB There are circuits on the board that are also shown on the schematic diagrams related to respiration monitoring These circuits are not used in this model N 3000 and are not described a Isolated Power Supply DC to DC voltage converter U9 uses Vdd power referenced to chassis ground from the UIF PCB to generate positive VCCI VDDI and VDRIVE voltages from the VOUT output A negative VEEI voltage is generated from the VOUT output of U9 These power
31. adjust the drive value rotate the knob The HEART PULSE RATE display will flash Pressing the UPPER ALARM LIMIT button will set the displayed value in the SpO2 module which will cease its automatic operation The HEART PULSE RATE display will stop flashing Press and hold the PRINT button to display the SpO2 corrected IR and red output signals as described in menu item 32 Release the PRINT button Press the LOWER ALARM LIMIT button to return to the service mode steady state 4 3 22 Menu Item 34 SpO2 Red LED Drive Test This function allows you to validate sensors and or the operation of the SpO2 module L Connect the sensor to the N 3000 2 Verify that the SpO2 module is set for automatic operation using menu item 39 paragraph 4 3 27 3 Press the LOWER ALARM LIMIT button to return to the service mode steady state 4 From the service mode steady state select menu item 34 by rotating the knob until 34 appears in the Sp02 display Press the UPPER ALARM LIMIT button 5 The SpO2 red LED drive value between 0 255 is displayed in the HEART PULSE RATE display 6 Toadjust the drive value rotate the knob The HEART PULSE RATE display will flash Pressing the UPPER ALARM LIMIT button will set the displayed value in the SpO2 module which will cease its automatic operation The HEART PULSE RATE display will stop flashing 7 Press and hold the PRINT button to display the SpO2 corrected IR and red output signals as descri
32. and CR8 detect the value of VCCI and increase the output of the optocoupler when it VCCI is over 5 volts Technical Supplement The transformer flyback pulse is rectified by CR7 and filtered by C12 C57 and R5 to create VCCI The other two transformer windings have three times as many turns than the VCCI winding These windings are rectified by CR5 and CR6 to achieve 15 volts during the flyback cycle These supplies are then regulated by U2 and U15 to 12 volts Normal transformer signals are filtered out of the circuitry by C55 R110 CR2 Q3 R38 C14 Q6 R53 and R49 However the Q7 turn on transition is a direct result of the ANALOG CLK signal This creates the isolated clock signal ISO CLK and guarantees a consistent output pulse time independent of the pulse width modulation and inductive transient changes b Timing ThelSO CLK is divided by U29 and decoded by U1 and U30 to create the timing signals used throughout the isolated section of the circuit The timing diagram Figure S4 2 shows the result of this decoding One complete cycle of the front end takes 16 ISO CLK cycles 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 oton TTT Bei I sCd WwRed _ Ff Py oy yy ye peut f f III reosmPL LO J 7 7 7 J Po Pe Figure S4 2 Timing Diagram C Microprocessor Control of Isolated Circuitry Controller U 10 sheet 1
33. attached Disconnect the leads from the cable The HEART PULSE RATE display should display OFF indicating that the leads are not attached Press the LOWER ALARM LIMIT button toreturn to the service mode steady state Exit the service mode by pressing the ON STANDBY button to power down the N 3000 3 3 6 3 Operation with a Live Subject Patient monitoring involves connecting the monitor to a live subject for a qualitative test L 2 3 14 Connect the monitor to an AC power source through the SPS power supply Connect an SCP 10 sensor input cable to the monitor Section 3 Performance Verification 3 Connect a Ndlcor Puritan Bennet Durasensor oxygen transducer model DS 100A to the sensor input cable 4 Clip the DS 100A to the subject as recommended in the sensor directions for use 5 Connect ECG electrodes to the patient 6 Connect a SCE 10 ECG cable to the N 3000 Connect ECG leads to the cable 7 Connect the ECG leads to the electrodes on the patient according to the leads directions for use 8 Press the ON STANDBY button to turn the monitor on and verify that the monitor is operating 9 The monitor should stabilize on the subject s physiological signal in about 10 to 15 seconds Verify that the saturation and heart rates are reasonable for the subject 3 3 6 4 Serial Interface Test The communications submodule of the N 3000 using an asynchronous EIA 232 communications format allo
34. calibrate sensor possible shorted open LED or cable Check sensor and cable connections Check sensor and cable replace if necessary If replacing sensor and or cable does not fix the problem remove the N 3000 monitor from service U se the SpO 2 diagnostic tests service mode menu item numbers 31 through 39 to further evaluate the problem Failure error codes are those that are displayed by the monitor with a leading digit other than 0 In some cases these codes can be cleared by simply turning the monitor off and then on again Table 5 3 lists the possible failure error codes and the recommended action to take If the action requires replacement of a PCB refer to Section 6 Disassembly Guide If the recommended action fails to solve the problem notify Nellcor Puritan Bennett Technical Services or your local representative Refer to the Appendix for a further explanation of the codes Section 5 Troubleshooting Table 5 3 N 3000 Failure Error Codes Recommended Action Turn the monitor off then on again If the error code still appears power down the monitor and verify that the UIF PCB ROM U3 is securely seated in its socket Turn the monitor on again If the error code still appears power down the monitor and replace the UIF PCB 108 109 1 Turn the monitor off then on again ea If the error code still appears power down the monitor and replace the UIF PCB 1 Turn the monitor off then on aga
35. cease use of the N 3000 on battery power connect it to its external power source and allow it to recharge approximately 14 hours The N 3000 may continue to be used while it is recharging Replace the UIF PCB 53 Section 5 Troubleshooting 5 6 2 Error Codes When there is a problem within the N 3000 monitor an error code may be displayed on the front panel as illustrated SpO2 QD min These codes correspond to messages that indicate what part of the monitor is at fault Actions to take when encountering error codes are listed below For a more thorough understanding of the error codes refer to Appendix A 5 6 2 1 User Correctable Error Codes The following error codes can be corrected by the operator Explanation 055 058 062 81 5 6 2 2 Failure Error Codes 54 Current user input values limits volumes times have been lost during an internal reset and the unit has returned to power on defaults Reset the values if different from power on defaults Alarm and beep volume audible alarm silence duration and operating mode have returned to power on defaults due to an internal instrument reset Alarm limits have been reset to their power on default due to software corruption in the ECG module Press the UPPER or LOWER ALARM LIMIT button twice to display the heart rate alarm limit This resets all limits to their power on defaults Turning the unit off and back on again produces the same results Cannot
36. displayed Factory defaults can be reset using the service mode procedure described in paragraph 4 3 11 Menu Item 20 Reset to Factory Defaults or the configuration mode procedure described in paragraph 4 2 8 6 Connect the SRC 2 pulse oximeter tester to the sensor input cable and connect the cable to the monitor Set the SRC 2 as follows SWITCH POSITION RATE 38 LIGHT LOW MODULATION HIGH MODE LOC RCAL 63 3 3 4 2 Alarm Silence Section 3 Performance Verification Press and release the ON STANDBY button toturn the monitor on After the normal power up sequence verify that the Sp02 and HEART PULSE RATE displays initially indicate zeroes Note Thepulse bar may occasionally indicate a step change as the monitor is in the pulse search mode Verify the following monitor reaction a The pulse bar begins to track the artificial pulse signal from the SRC 2 b After at least five pulses the monitor displays a saturation and pulse rate within the following tolerances Oxygen Saturation Range 79 to 83 Pulse Rate Range 37 to 39 bpm c The pulse beep will be heard d Theaudio alarm will sound and both the SpO 2 and HEART PULSE RATE display will flash indicating both the Sp02 and pulse rate have violated the default alarm limits To silence the alarm continue with the following paragraph After completing paragraph 3 3 4 1 1 Press and hold the AUDIBLE ALARM OFF button on the top of the monitor The alarm i
37. get power on defaults from EEPROM or they are invalid bad values or low limit above high limit 283 Operating mode changed during internal reset SpO 2 state machine illegal transition or unknown state 285 SpO 2 Controller PCB failure SpO 2 PCB failure 7 SpO 2 detected failure of other system component UIF PCB UIF software or communication problem 288 SpO 2 module failure cannot determine whether SpO2 Controller PCB or SpO2 PCB 25 25 25 25 25 27 28 28 8 A 4 TECHNICAL SUPPLEMENT S1 S2 S2 1 INTRODUCTION S1 Introduction S2 Oximetry Overview S3 Stackbus Interconnect S4 Circuit Analysis S5 Schematic Diagrams This Technical Supplement provides the reader with a discussion of oximetry principles and a more in depth discussion of N 3000 circuits A functional overview and detailed circuit analysis are supported by block and schematic diagrams The schematic diagrams are located at the end of this supplement OXIMETRY OVERVIEW Pulse oximetry is based on two principles e Oxyhemoglobin and deoxyhemoglobin differ in their absorption of red and infrared light spectrophotometry es The volume of arterial blood in tissue and hence light absorption by that blood changes during the pulse plethysmography A pulse oximeter determines SpO2 by passing red and infrared light into an arteriolar bed and measuring changes in light absorption during the pulsatile cycle Red and infrared low voltag
38. in the regular trash Dispose of properly or return to Nellcor Puritan Bennett Technical Services for disposal Replace batteries observing correct polarity positive terminal up Ensure that they are secure Reassemble the chassis Reassemble the monitor by performing the disassembly steps in reverse order 1 Ensurethat all plastic isolation shields are reinstalled correctly 2 Ensurethat the small wiper fingers that make contact with the side panel metalized coating throughout the top chassis fit properly 3 Ensure that all buttons are seated properly and operate smoothly 4 All of the side panels have channel guides molded into the top and bottom chassis to assist in proper location and seating 5 Toinstall the handle locate the small spring attached to one side After all PCBs and side panels have been properly seated in the top chassis install the handle into the cradlein a vertical position Guide the spring into the molded channel located at the rear of the top chassis while leaning the handle to the inside of the unit When properly seated the handle will rotate out with a small amount of spring tension and naturally return to the vertical resting position 6 Depending upon the level of repairs you may have to reconfigure the monitor s Internal Configuration Code ICC in order to get the monitor to operate properly Refer to the service mode section menu item 21 of this manual 6 11 Section 7 Spare Part
39. indicates the current default setting While continuing to hold the AUDIBLE ALARM OFF button rotate the control knob CCW to decrease the alarm volume setting to a minimum value of 1 The alarm tone should still be audible Rotate the control knob CW to increase the alarm volume setting to a maximum value of 10 Rotate the knob until a comfortable audio level is attained Release the AUDIBLE ALARM OFF button The tone will stop 3 3 4 4 Pulse Tone Volume Control L Rotate the control knob CW and verify that the beeping pulse tone sound level increases Rotate the control knob CCW and verify that the beeping pulse tone can be turned off completely Rotate the knob CW until a comfortable audio level is attained 3 3 4 5 Dynamic Operating Range 38 The following test sequence will verify proper monitor operation over a wide range of input signals Note TheN 3000 pulse qualification may occasionally reject some pulses from the SRC 2 pulse oximeter tester This is indicated by the missing audible pulse tone and the illuminated PATIENT MOTION indicator Verify that the monitor is still displaying saturation and that pulse information is in compliance with the SRC 2 tolerance Both displays are still flashing due to alarm limit violation Oxygen Saturation Range 79 to 83 Pulse Rate Range 37 to 39 bpm Ensure the MODULATION switch on the SRC 2 is set to HIGH and verify that after a few seconds the monitor indications are with
40. of schematic is an Octal 8 bit DAC The reference voltage for U 10 is 5 volts created by U39 Two U 10 outputs VOUTA and VOUTB are used to program the LED outputs for the IR and RED channels The other six signal lines are used as logic lines Five control amplifier gain PDO and PD1 select the predemodulation gain while DMO DM1 and DM2 control the demodulated gain The remaining signal line CAL U10 pin 18 selects the calibration setting d LED Drive The LED drive circuitry is shown in the lower left corner of the schematic diagram sheet 2 Signal outputs from U 10 RED LED and IR LED are used to control LED brightness These signals are multiplexed by U31 and buffered by one half of U 32 A voltage divider circuit consisting of R101 and R102 divide the multiplexed signal down to the proper voltage to use as a reference for the other half of U 32 Additionally R92 provides a path for stray current during the off period to ensure that the LEDs aretruly off Components R97 R98 and Q12 provide secondary protection against over current drive by disabling the control op amp if the voltage goes above 0 9 volts S 5 Technical Supplement S 6 Components R30 and C24 filter any high frequency noise on VCCI that is beyond the bandwidth of U32 Finally Q13 R104 and R105 turn the LEDs off between pulses e Differential Input Amplifier Input op amp U23 converts the differential current to a voltage One side of the outp
41. the 1 second period Rotate the control knob CW until 47 4 appears in the Sp02 display The number shown in the HEART PULSE RATE display is the average value in volts for the ECG analysis channel during the 1 second period Rotate the control knob CW until 47 5 appears in the Sp02 display The number shown in the HEART PULSE RATE display is the minimum value in volts for the ECG analysis channel during the 1 second period Press the LOWER ALARM LIMIT button to return to the service mode steady state 4 3 36 Menu Item 49 ECG Enable Automatic Operation This function allows you to enable or disable the ECG module automatic operation mode 1 From the service mode steady state select menu item 49 by rotating the knob until 49 appears in the Sp02 display Press the UPPER ALARM LIMIT button The HEART PULSE RATE display indicates whether or not the ECG module is in automatic operation OFF not in automatic operation ON in automatic operation Rotate the knob to change the setting 427 Section 4 Configuration Mode Service Mode and Alarm Active Function 4 Press the LOWER ALARM LIMIT button toreturn to the service mode steady state 4 3 37 Menu Item 60 Set Serial Port Baud Rate This function allows you to set the default serial port baud rate 1 From the service mode steady state select menu item 60 by rotating the knob until 60 appears in the Sp02 display Press the UPPER ALARM
42. the analog interface with the ECG PCB through connector J 4 These analog signal lines are applied to analog to digital converter U 10 Digital representations of the analog signals are then provided to microprocessor U 1 serially on the M1ISO QSO line f Intermodule Connector The ECG controller board is connected to the UIF board via the 1 intermodule connector The UIF board provides power to the ECG controller Stackbus and module synchronization lines are also routed through J 1 4 2 6 Communications Submodule S 18 The communications submodule contains circuitry for allowing 1500V isolated asynchronous serial RS232 or RS422 communications between the N 3000 UIF module and a host computer a 1500V isolated nurse call signal that operates whenever an alarm condition exists or a 1500V isolated 3 3V power source for powering remote external serial equi pment Signals that originate on the UIF board include UARTTXD Transmit data from UART UARTRXD Receive data to UART UARTDTR Data terminal ready from UART UARTDSR Data set ready to UART ALARMACTIVE Prog I O from UART Shutdown Prog I O from UART Technical Supplement Connector J 5 contains the signals for communicating with the UIF board J 8 as detailed in Table S4 2 Auxiliary connector J 2 on the communications PCB is for future expansion a Serial Communications Serial communications are available only when the SPS power supply is connected to the N 3000 docking c
43. the knob to adjust the red LED drive level indicated in the HEART PULSE RATE display to 255 While watching the RED indicator on the SRC 2 confirm the setting by pressing the UPPER ALARM LIMIT button The LED intensity should increase Rotate the knob to adjust the red LED drive level indicated in the HEART PULSE RATE display to 0 Press the UPPER ALARM LIMIT button The RED indicator should turn off Rotate the knob to adjust the red LED drive level indicated in the HEART PULSE RATE display to 170 Press the UPPER ALARM LIMIT button The RED indicator intensity should increase Press the LOWER ALARM LIMIT button toreturn to the service mode steady state Press the ON STANDBY button to turn the N 3000 off 3 66 PIEZO SPEAKER TEST The following test verifies that the piezo power loss alarm speaker sounds an alarm when the N 3000 loses power WARNING Before attempting to open or disassemble the N 3000 disconnect the power cord from the N 3000 321 Section 3 Performance Verification Caution Observe E SD electrostatic discharge precautions when working within the unit 1 Ensure that the N 3000 is turned off 2 Disconnect the monitor from the SPS power supply 3 Set the N 3000 upside down facing you as shown in Figure 3 6 Battery cover ek el Squeeze Battery cover C Paa Figure 3 6 Battery Cover Removal A Using a small Phillips head screwdriver loosen the two battery cover retaining fas
44. 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 D 25 sensors Neonatal accuracy is determined with Oxisensor II N 25 sensors In addition the neonatal accuracy specification is neonatal blood on oximetry measurements Pulse Rate SpO2 optically derived 20 250 bpm 3 bpm Heart Rate ECG derived 20 250 bpm 5 bpm Accuracies are expressed as plus or minus X bpm across the display range This variation equals plus or minus 1SD which encompasses 68 of the population 9 3 Section 9 Specifications 94 ECG Specific Performance Characteristics Characteristic CMRR Common Mode Rejection gt 90 dB at 50 or 60 Hz Ratio Frequency Response bandwidth of 0 5 to 40 Hz 1 to 1 5 dB at 0 5 Hz 1 to 3 dB at 40 Hz Input Impedance 2 5 megohms at 10 Hz Defibrillator Discharge Recovery lt 8 seconds lt 5 seconds to 80 recovery Calibration 1 millivolt reference indicator available for N 3200 ECG waveform display Tall T wave Rejection Meets AAMI EC13 section 3 1 2 1 for 1 2 mV T wave and 1 mV QRS using AAMI test waveform Response to Irregular Rhythm a Ventricular bigeminy 80 bpm AAMI EC13 3 1 2 1 Figure 3 b Slow alternating ventricular bigeminy 60 bpm c Rapid alternating ventricular bigeminy 120 bpm d Bidirectional systoles 88 to
45. the service but does not respond mode menu item 2 knob and lamp test to the knob buttons are operational Verify proper connection between knob and UIF PCB If the condition still persists replace the UIF PCB 2 TheN 3000 responds Verify the problem and identify faulty buttons to some but not all with the service mode menu item 3 button buttons test If faulty buttons are AUDIBLE ALARM SILENCE button or NEW PATIENT NEONATAL button replace UIF PCB If faulty buttons are on front panel replace Display PCB If the buttons still do not work replace the UIF PCB 3 The N 3000 turns on Press the NEW PATIENT NEONATAL button but does not respond twice rapidly If the NEONATAL MODE to either the knob or indicator lights replace the Display PCB any of the buttons _ Ifthe NEONATAL MODE indicator does not light replace the UIF PCB 57 Section 5 Troubleshooting 5 6 4 Display Alarms Table 5 5 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 5 Display Alarms Problems Condition 1 Display values are missing or erratic Display segments do not light When the ECG cable is connected there is no HEART PULSE RATE display but the SpO 2 display is functional Alarm sounds for no apparent reason Alarm does n
46. the upper 8 bits of data U3 data bus lines D7 through DO are connected to U23 data bus lines D7 through DO for the lower 8 bits of data The active low chip select inputs of U13 and U23 are connected to the CSO and CS1 chip select outputs of U3 The active high chip select inputs of U 13 and U 23 are connected to the active low system reset to prevent writing to the RAM while the system power is coming on or while the watchdog reset is active The output enables of U13 and U23 are connected to digital ground The write enable inputs of U13 and U23 are connected to the data direction R W output of U3 At system reset the RAM chips are disabled and CSO and CS1 from U3 are disabled After system reset CSO and CS1 are configured to be gated with data strobe output DS from U3 When the N 3000 is in STANDBY RAM power is supplied by the backup battery output of the BQ2001 Power is maintained by the N 3000 lead acid battery and in the event that the lead acid battery becomes discharged or is removed by the lithium backup battery BT1 Arcnet controller U6 is the Arcnet controller COM 20020 It is used by the processor to implement the stackbus protocol It is an 8 bit memory mapped device that manages the stackbus communications physical implementation along with the stackbus adapter It is connected to the upper 8 bits of the processor data bus to allow for byte operations from the processor The chip select for U6 is processor pin CS4
47. well as providing a 32 679kHz source clock It is an 8 bit memory mapped peripheral connected to the upper 8 bits D15 through D8 of the processor data bus The internal stackbus provides the communications for the UIF module and the SpO 2 module The external stackbus is used to communicate with other instruments when the unit is used in the stack configuration The chip select for U14 is processor pin CS3 Universal Asynchronous Receiver Transmitter UART U24 is an industry standard 16C550 It is an 8 bit memory mapped peripheral connected to the upper 8 bits D15 through D8 of the processor data bus It contains two 8 byte FIFOs one for transmit and one for receive a baud rate generator and several programmable I Os for enabling isolated power on the communications module serial communication handshaking and alarm active signaling The chip select for U24 is processor Pin CS6 SpO2 ECG Module Module U8 gt Communi cationbus Internal Stackbus Adaptor External Stackbus UIF Board Se Ges ocking acke Connector Instruments Figure S4 3 Internal External Stackbus Connections d Processor Support ICs The processor support Cs are used to monitor the processor and its power supply resetting U3 when necessary and to sound an alarm using piezo speaker Y 1 when the processor appears to be inoperative or when the unit has had an unexpected power loss The processor support Cs are watchdog timer U21
48. 29 Section 5 Troubleshooting A 5 1 5 1 datt ee tee In EE 5 1 5 2 Howto Use this Section cceccceceeeeeeeeeee ceeeceeeeeseaeeesaeeseeeeeeas 5 1 5 3 Who Should Perform Hepairs neerrsssrnssrnssrnsses 5 1 5 4 Replacement Level Supported cecceeeeeeeeeeee ceeeeeeeteeeeeeaes 5 1 55 Obtaining Replacement Parts cccccceeeeeeeeeeeeceeeeeeeeneeeeeeeees 5 1 5 6 Troubleshooting guide ssssseesssssssrreersrnrneerrnesrnnnnernnnsrenneennnens 52 5 6 1 POWO are laee sien r eeben 5 3 5 6 2 Error COGS AAA 5 4 5 6 2 1 User Correctable Error Codes cccccceesceeeteeeeee eee 5 4 5 6 2 2 Failure Error Codes 0 ccceesceeeeeeeeeeeee ceeeeeeeeeeeeeeeeees 5 4 5 6 3 ButtOns KnOD S e ter ugert gou deceit totic Eege Ego 5 7 5 6 4 Display AlarmS eeeeeeaeeeeeneeeeneieeeene 5 8 5 6 5 Operational Performance cccccecceeeeeeeeeeeeeeeeees 5 9 5 6 6 Stacked Operation 5 10 5 6 7 ena Port dret aaaea Side eege eieaa 5 12 Section 6 Disassembly Guide cee eeteeeenee sees teeeeetieeeee es 6 1 6 1 IATRODUGUION EE 6 1 6 2 Removing the Battery 0 eee eeeeeeeee cece eeeeeeeetaeeeeeeieeeenenae ed 6 2 6 3 Battery Replacement cccccccceseeeecee ceeeeeeeeeeeeeeeeeeeeeseneeneneees 6 3 6 4 Fuse Replacement AA 6 4 6 5 Monitor DisAaSSEMbly AAA 6 4 6 5 1 Communications Board Switch Settings 0000 0 6 5 6 6 Removing the Alarm Speaker cccccecceeeeeseeceeeeeeeeeeeneeeeeeeees 6
49. 3 Dynamic Operating Range The following test sequence will verify proper monitor operation over a range of input signals 1 Verify that the monitor is still displaying the heart rate value in compliance with the ECG tester setting paragraph 3 3 5 1 The HEART PULSE RATE display is still flashing due to alarm limit violation The AUDIBLE ALARM OFF indicator is also flashing Select the following settings on the ECG tester PARAMETER SETTING HEART RATE 60 bpm AMPLITUDE 0 5 millivolt LEAD SELECT lI SINUS RHYTHM Normal Verify the following monitor reaction a The heart rate beep decreases in frequency b TheHEART PULSE RATE display decreases in value and stops flashing indicating that the heart rate is now within alarm limit settings CG TheSp02 and AUXILIARY displays remain blank The PULSE AMPLITUDE indicator is not lit 311 Section 3 Performance Verification d The monitor displays a heart rate of 60 5 bpm Select the following settings on the ECG tester PARAMETER SETTING HEART RATE 240 bpm AMPLITUDE 2 millivolt LEAD SELECT lI SINUS RHYTHM Normal Verify the following monitor reaction a b d The heart rate beep increases in frequency The HEART PULSE RATE display increases in value and flashes indicating that the heart rate is now outside alarm limit settings The Sp02 and AUXILIARY displays remain blank The PULSE AMPLITUDE indicator is not lit The monitor display
50. BLESHOOTING GUIDE Problems with the N 3000 are separated into the categories indicated in Table 5 1 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 Nellcor Puritan Bennett Technical Services or your local representative Table 5 1 Problem Categories Problem Area Refer to Paragraph 1 Power 5 6 1 No power up on AC and or DC F ails power on self test Powers down without apparent cause sue 3 Buttons K nob 5 6 3 e Monitor does not respond properly to buttons and or knob 4 Display Alarms e Displays do not respond properly e Alarms or other tones do not sound properly or are generated without apparent cause 6 Stacked Configuration e N 3000 operates properly when used alone but not when stacked 7 Serial Port e N 3000 and PC not communicating properly 5 Operational Performance 5 6 5 e Displays appear to be operational but monitor shows no readings e Suspect readings All of the categories in Table 5 1 are discussed in the following paragraphs 52 5 6 1 Power Section 5 Troubleshooting Power problems are related to AC and or DC Table 5 2 lists recommended actions to power problems Table 5 2 Power Problems Recommended Action Ensurethat the SPS power supply is plugged into 1 BA
51. EIERE kansas 4 3 17 Menu Item 29 Instrument Compatibility Report 4 3 18 Menu Item 30 SpO2 RCAL Report 4 3 19 Menu Item 31 SpO2 IR and Red Offset Report 4 3 20 Menu Item 32 SpO2 Corrected IR and Red Signals FROPOM ges ee eege Be ee eine athe he 4 3 21 Menu Item 33 SpO2 IR LED Drive Test 4 3 22 Menu Item 34 SpO2 Red LED Drive Test 4 3 23 Menu Item 35 SpO2 DM Gain Test 0 easeeseeeeneeene 4 3 24 Menu Item 36 SpO2 P Gain Test 4 3 25 Menu Item 37 Set SpO2 Analog Test Mode Table of Contents 4 3 26 Menu Item 38 SpO2 A D Cal Line Test ee 4 23 4 3 27 Menu Item 39 SpO2 Enable Automatic Operation 4 24 4 3 28 Menu Item 40 Set ECG Lead eee 4 24 4 3 29 Menu Item 41 Set ECG Pacer Filter 4 24 4 3 30 Menu Item 42 Set ECG Low Frequency Filter 4 25 4 3 31 Menu Item 43 Set ECG Baseline Reset 0011aaeeean 4 25 4 3 32 Menu Item 44 ECG POST Test Gong 4 26 4 3 33 Menu Item 45 Check ECG Cable Off Detection 4 26 4 3 34 Menu Item 46 Check ECG Lead Off Detection 4 26 4 3 35 Menu Item 47 Display ECG Output Value 00000000 4 27 4 3 36 Menu Item 49 ECG Enable Automatic Operation 4 27 4 3 37 Menu Item 60 Set Serial Port Baud Hate 0 1000000 4 28 4 3 38 Menu Item 61 Serial Port Loop Back Test 4 28 4 3 39 Menu Item 62 Serial Port Transmit Test 4 29 44 Alarm Active Funchon eeeeeaeeeeeeaaeeeeenaeeeeseaeee 4
52. G performance requirements of ANSI AAMI EC 13 with the exception of clause 3 2 6 1 The N 3000 is unable to reject signals having a QRS amplitude of 1 0 millivolts and a duration of 10 milliseconds 9 5 APPENDIX A1 Error Types A2 User Correctable Error Codes A3 Failure Error Codes A4 Internally Corrected Error Codes A1 ERROR TYPES There are six classes of errors that may occur during the operation of the N 3000 as indicated in Table A 1 Table A 1 Error Types Error Type Description 1 Generic POST processor failure Initialization failure Failure error at the end of initialization or during steady state operation Internally corrected error User correctable error Unexpected loss of power A shrill continuous alarm may sound and the display may go blank or nothing may happen This represents a severe hardware failure For example the UIF processor could not activate the display or speaker facilities An error code representing the failure is displayed and a low priority alarm sounds but no entry is madein the Error Log POST has proceeded to the point that the UIF processor controls the display and speaker facilities The error cannot be logged because the Error Log portion of the EEPROM has failed or internal communications to the Error Log cannot be established An EEExxx code representing the failure is displayed a low priority alarm sound is produced and a failure
53. HT LOW MODULATION OFF MODE REM RCAL 63 If you are not already in the service mode enter the service mode steady state as instructed in paragraph 4 3 Select menu item 33 by rotating the knob until 33 appears in the SpO 2 display Press the UPPER ALARM LIMIT button 10 11 12 13 14 15 16 17 18 19 20 21 22 Section 3 Performance Verification The SpO2 IR LED drive value 170 is displayed in the HEART PULSE RATE display The IR indicator on the SRC 2 is illuminated Rotate the knob to adjust the IR LED drive level indicated in the HEART PULSE RATE display to 255 While watching the IR indicator on the SRC 2 confirm the setting by pressing the UPPER ALARM LIMIT button The LED intensity should increase Rotate the knob to adjust the IR LED drive level indicated in the HEART PULSE RATE display to 0 Press the UPPER ALARM LIMIT button The IR LED should turn off Rotate the knob to adjust the IR LED drive level indicated in the HEART PULSE RATE display to 170 Press the UPPER ALARM LIMIT button The IR LED intensity should increase Press the LOWER ALARM LIMIT button toreturn to the service mode steady state Select menu item 34 by rotating the knob until 34 appears in the SpO 2 display Press the UPPER ALARM LIMIT button The SpO2 red LED drive value 170 is displayed in the HEART PULSE RATE display TheIR indicator on the SRC 2 is illuminated Rotate
54. IGH and verify that after a few seconds the monitor indications are within the tolerances listed in step 6 Move the LIGHT switch to LOW and verify that after a few seconds the monitor indications are within the tolerances listed in step 6 Move the MODULATION switch to LOW and verify that after a few seconds the monitor indications are within the tolerances listed in step 6 Move the RATE switch to 201 bpm After approximately 30 seconds verify that the HEART PULSE RATE display is flashing and the display indications are within the tolerances shown below Oxygen Saturation Range 79 to 83 Pulse Rate Range 195 to 207 bpm Move the MODULATION switch to HIGH and verify that after a few seconds the monitor indications are within the tolerances listed in step 12 Move the LIGHT switch to HIGH 1 and verify that after a few seconds the monitor indications are within the tolerances listed in step 12 Move the MODULATION switch to LOW and verify that after a few seconds the monitor indications are within the tolerances listed in step 12 Move the LIGHT switch to HIGH 2 and verify that after a few seconds the monitor indications are within the tolerances listed in step 12 With the MODULATION switch to LOW verify that after a few seconds the monitor indications are within the tolerances listed in step 12 Turn the N 3000 off Disconnect the tester from the cable 39 Section 3 Performance Verification 3 3 5 Operation with an ECG T
55. IT button 8 ON STANDBY button 18 LEADS OFF indicator 9 POWER ON indicator 19 PULSE SEARCH indicator 10 STACKED indicator 20 PATIENT MOTION indicator Not used on this model A puse tare min i CH NEONATAL RFLOCK SR Ein PULSE SEARCH LEADS OFF 20 19 18 1716 15 14 13 12 11 10 Figure 1 2 N 3000 Front Panel North American 1 4 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 N 3000 operator s manual To understand the various Ndlcor Puritan Bennett sensors and ECG leads that work with the monitor refer to the individual sensor or leads directions for use SECTION 2 ROUTINE MAINTENANCE 2 1 2 2 2 3 CLEANING 2 1 Cleaning 2 2 Periodic Safety and Functional Checks 2 3 Batteries Caution Do not immerse the N 3000 or its accessories in liquid or clean with caustic or abrasive cleaners Do not spray or pour any liquid on the monitor or its accessories To dean the N 3000 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 and ECG lead e
56. N no lead off is detected 3 Section 4 Configuration Mode Service Mode and Alarm Active Function Press the LOWER ALARM LIMIT button to select the setting and return to the service mode steady state 4 3 35 Menu Item 47 Display ECG Output Value This function allows you to test the ECG A D channel 1 From the service mode steady state select menu item 47 by rotating the knob until 47 appears in the Sp02 display Press the UPPER ALARM LIMIT button The PULSE SEARCH indicator is illuminated The number 47 0 appears in the SpO02 display and the HEART PULSE RATE display flashes ON while the maximum minimum and average values for the ECG display and ECG analysis channels are captured When ON stops flashing the maximum value in volts for the ECG display channel is indicated in the HEART PULSE RATE display Rotate the control knob CW until 47 1 appears in the Sp02 display The number shown in the HEART PULSE RATE display is the average value in volts for the ECG display channel during the 1 second period Rotate the control knob CW until 47 2 appears in the Sp02 display The number shown in the HEART PULSE RATE display is the minimum value in volts for the ECG display channel during the 1 second period Rotate the control knob CW until 47 3 appears in the Sp02 display The number shown in the HEART PULSE RATE display is the maximum value in volts for the ECG analysis channel during
57. Normal Normal Reverse Normal Reverse Open Normal Open Section 3 Performance Verification 3 4 2 2 Patient Source Current This test is in compliance with AAMI Standard ES1 paragraph 3 3 2 Patient Source Current is measured between any individual patient connection and power earth ground L Configure the electrical safety analyzer as follows Function Leakage Range uA Connect the monitor AC plug to the electrical safety analyzer as recommended by the analyzer operating instructions for patient source current Connect the electrical safety analyzer leakage input lead to the monitor s sensor input connector The analyzer leakage indication must not exceed 10 microamps for all of the following AC power configurations with the monitor on AC LINE POWER LINE POLARITY GROUND CABLE Normal Normal Reverse Normal Reverse Open Normal Open 3 4 2 3 Patient Sink Current This test is in compliance with AAMI Standard ES1 paragraph 4 4 Patient sink current is measured in a patient connection if a source of 240 volts 50 Hz or 120 volts 60 Hz with respect to power earth ground is connected to that patient connection 1 Configure the electrical safety analyzer as follows Function Leakage Range uA Connect the monitor AC plug to the electrical safety analyzer as recommended by the operating instructions for patient sink current Connect the electrical safety analyzer leakage input lead to the monit
58. O 31 32 33 34 35 37 38 39 4 11 Section 4 Configuration Mode Service Mode and Alarm Active Function Table 4 3 Service Mode Steady State Main Menu Continued Paragraph Type of Report Test Described 40__ seecGlead 8 44 Set ECG POST Test Signal 4332 46 Check ECG Lead Off Detection 4334 49 ECG Enable Automatic Operation 4336 60 Se Serial Port BaudRate 4337 70 Nelicor Puritan Bennett Internal Test DONOTUSE 4 3 1 Menu Item 1 Software Version Report 4 12 This report identifies the software versions of the UIF and SpO2 modules 1 From the service mode steady state select menu item 1 by rotating the Ndicor Puritan Bennet knob until 1 appears in the Sp02 display Press the UPPER ALARM LIMIT button A 1 0 appears in the SpO2 display The UIF software version number is the left most digit in the HEART PULSE RATE display The next two digits in the HEART PULSE RATE display represent the major software revision number The minor software revision number is displayed in the AUXILIARY display 2 Rotate the knob to change the number in the SpO 2 display to 1 1 The SpO2 software version number is the left most digit in the HEART PULSE RATE display The next two digits in the HEART PULSE RATE display represent the major software revision number The minor software revision number is displayed in the AUXILIARY display 3 Rotate the knob to change the n
59. Operating Mode Pulse Beep Volume Audible Alarm Volume Audible Alarm Silence Duration Alarm Silence Reminder Latching Alarms Primary Heart Pulse Source Pulse Beep Source ECG Lead Selection ECG Pacer Filter ECG Low Frequency Filter Trend Format Serial Port Baud Rate 9 2 Default Setting Adult Pediatric 57 5 dB A at 1 meter volume setting 4 61 dB A at 1 meter volume setting 5 60 seconds ON OFF ECG SpO 2 II ON OFF 10 second averaged F ormat 1 19 200 bits per second Section 9 Specifications 9 7 PERFORMANCE Range SpO 2 0 100 Pulse H eart Rate 20 250 bpm Alarm Characteristics Alarm Pitch Pulse Width Pulse Repitition Priority 30 Hz 20 msec Interval 20 msec SCH 752Hz SE 3600 msec Rise fall time for pulses is 16 milliseconds 3 milliseconds Flashing Display Characteristics During high or medium priority alarms the 5 inch red front panel display whose parameter is outside the alarm limits flashes at the following rates High priority 300 milliseconds ON 150 milliseconds OF F Medium priority 750 milliseconds ON 600 milliseconds OF F Accuracy SpO2 Adults 70 100 2 digits 0 69 unspecified Neonatal 70 95 2 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 1SD which encompasses 68 of
60. Pacer Filter Status 48 Menu item number 9 allows you to select either ON or OFF as the pacer filter default Pacer filter ON causes the N 3000 to detect and filter pacemaker generated noise signals so that they will not be measured in determining a patient s heart rate When the filter is ON pacemaker signals of 1 to 2 0 milliseconds in duration with 2 0 to 700 0 millivolt amplitude are filtered out 1 From the configuration menu steady state rotate the knob until 9 is displayed in the SpO02 display Press the UPPER ALARM LIMIT button ON or OFF is displayed in the HEART PULSE RATE display To change the default setting rotate the knob until the desired setting is displayed Press the LOWER ALARM LIMIT button to return to the configuration menu steady state Section 4 Configuration Mode Service Mode and Alarm Active Function 4 2 8 11 ECG Low Frequency Filter Status Menu item number 10 allows you to select ON or OFF as the low frequency filter default Selecting ON enables a 05 Hz ECG channel high pass filter providing better ST segment resolution When OFF is selected a 0 5 Hz filter is used 1 From the configuration menu steady state rotate the knob until 10 is displayed in the Sp02 display Press the UPPER ALARM LIMIT button 2 ON or OFF is displayed in the HEART PULSE RATE display To change the default setting
61. TTERY IN USE BATTERY LOW indicator lights steadily while N 3000 is connected to AC via the external power supply The N 3000 does not operate when disconnected from its external power supply or the power failure alarm sounds when AC power is disconnected BATTERY IN USE BATTERY LOW indicator flashes during DC operation The microproces sor failure alarm sounds and no error code is displayed an operational AC outlet If it is and the green indicator light is not lit replace the power supply If the green SPS indicator is lit ensure that the power supply is properly plugged into the N 3000 Check the fuse The fuse is located on the lower docking connector as indicated in paragraph 6 3 and Figure 6 3 of the Disassembly Guide section Replace if necessary Check the ribbon connection from the bottom enclosure to the UIF PCB as instructed in paragraph 6 5 of the Disassembly Guide section If the connection is good replace the UIF PCB The battery may be discharged To recharge the battery refer to paragraph 3 3 2 Battery Charge The monitor may be used with a less than fully charged battery but with a corresponding decrease in operating time from that charge If the battery fails to hold a charge replace the battery as indicated in Section 6 Disassembly Guide There are 15 minutes or less of usable charge left on the N 3000 battery At this point if possible
62. U 17 The output of U 17 is the PACER signal which is applied to the ECG Controller as the TPU15 signal This signal is used to reduce interference in the ECG signal caused by pacemakers h Non isolated Power Supply Power for the non isolated circuits on the ECG PCB is supplied on the ANALOGPWR line from the UIF PCB through the ECG Controller The ANALOGPWR voltage is filtered to produce the V_10V operating voltage ANALOGPWR is also applied to voltage converter U 26 to produce VCC operating voltage VCC is then used to produce VEE in converter U27 and to produce V_10M in converter U 22 Voltage regulator U29 produces a 2 5 volt reference voltage from VCC The user interface UIF network gateway and battery charge functions are controlled by the UIF module This module provides power to the other modules within the N 3000 controls communication between each module via the stackbus and provides charge control for the lead acid battery a Power and Battery Charging Power from the lead acid battery or the lower docking connector is delivered via the lower docking board ribbon cable connected to J 13 Pin 1 of J 13 is BATTPLUSI1 and Pin 6 of J 13 is CHARGEBUS Pin 2 of J 13 is earth ground and Pin 5 is system ground These pins are defined in table S4 1 Both CHARGEBUS and BATTPLUS1 are connected using diode isolation and then connected through the drain of power transistor Q10 and Pin 7 of J 13 BATTBUS to other stacked instruments Tech
63. UIF PCB Figure 6 8 After removing the nuts lift straight up Communications PCB 1 4 inch nut Top enclosure ECG PCB Figure 6 8 Communications PCB Removal 6 9 REMOVING THE ECG PCB AND ECG CONTROLLER PCB 1 Complete the procedure in paragraph 6 5 2 Remove the rear panel rear panel insulator and NEW PATIENT NEONATAL button by lifting up and rotating out of the chassis channel guides as illustrated in Figure 6 7 3 RemovetheECG PCB and the ECG Controller PCB by disconnecting them from the Pemm studs on the UIF PCB Pull up on the top board from the right side to disconnect from the Pemm studs 4 Toremove the ECG PCB from the ECG Controller PCB unsnap the ECG PCB from the Pemm studs on the ECG Controller PCB 6 10 REMOVING THE UIF PCB AND DISPLAY PCB 1 Complete the procedures in paragraphs 6 7 6 8 and 6 9 2 Remove the right side panel by lifting it straight up 3 Remove the front panel bezel by gently lifting it up and rotating it away from the Display PCB as illustrated in Figure 6 9 The display PCB is secured to the UIF PCB via the 5 connector To remove the Display PCB the UIF PCB must first be loosened to allow the Display PCB to be lifted out of the molded chassis housing slots 68 Section 6 Disassembly Guide J5 connector UIF PCB Piezo power loss D alarm speaker Lithium backup battery Speaker boost Control knob l lithium battery ribbon cable l
64. UO J 3 Knob connector J 3 allows the U3 controller to detect knob movement Table S4 6 J3 Knob Connector 4 2 4 SpO2 Controller The central processing unit CPU for the SpO2 Controller PCB is the U1 microprocessor It contains an 8 channel 10 bit analog to digital converter Six inputs ANALOGO to ANAL OG5 are bussed to the analog board interface connector J 4 Of the remaining signals ANALOG6 is connected to Vcc and ANALOG7 is connected to ground These analog inputs are used during the POST to verify proper operation S 15 Technical Supplement S 16 a CPU Reset Voltage monitor U2 shown in the upper left hand corner of the schematic diagram generates the reset for U1 Reset is held low until Vcc raises above 4 6 volts After Vcc is above 4 6 volts reset is tri stated and pulled high by R10 Note L1 L2 and L3 provide filtering for Vcc b Program Memory EPROM The program memory chip U4 provides the SpO2 controller board with 128K bytes of memory This program boot ROM memory can be expanded up to 256K bytes The CSBOOT signal from U1 which is configured for 16 bit memory access provides the enable signal for U4 After system software comes on or is booted up CSBOOT is configured for a start address of 0 a block length of 256K bytes both read and write access and gated with AS This configuration provides a program memory range of 00000h through 3FFFFh The number of wait states needed befo
65. al port transmit menu paragraph 3 3 5 3 are item 62 tests in the service mode correct but messages are paragraphs 4 3 38 and 4 3 39 If the tests not being transmitted or are successful recheck the message formats received you are sending to the monitor ensure that a good cable connection exists between PC and N 3000 and verify the baud rate using the service mode menu item 60 When connected to a PC in the RS 232 format a baud rate above 19 200 should not be used If the test fails ensure the Communications PCB switch settings are as described in paragraph 6 8 If the condition persists replace the Communication PCB If the condition still persists replace the UIF PCB 5 12 SECTION 6 DISASSEMBLY GUIDE 6 1 Introduction 6 2 Removing the Battery 6 3 Battery Replacement 6 4 Fuse Replacement 6 5 Monitor Disassembly 6 6 Removing the Alarm Speaker 6 7 Removing the SpO2 PCB and SpO2 Controller PCB 6 8 Removing the Communications PCB 6 9 Removing the ECG PCB and ECG Controller PCB 6 10 Removing the UIF PCB and Display PCB 6 11 Control Knob Assembly Replacement 6 12 Lithium Battery Replacement 6 13 Reassembly 6 1 INTRODUCTION The N 3000 can be disassembled down to all major component parts including PCBs batteries cables function buttons chassis enclosures The following tools are required small Phillips head screwdriver medium Phillips head screwdriver needle nose pliers o
66. and the processor power fail circuitry consisting of U16 U1 U2 U11 U22 and U29 S 12 Technical Supplement Watchdog Timer Timer U21 ensures that processor U3 does not operate and switches the backup battery power from U 20 to the RAMPWR supply when the 5 volt supply is below its lower regulation limit This chip holds U3 in reset until the power supply is above its lower regulation limit The watchdog timer also resets the processor if the processor input signal CLRWD is not toggled within a timeout period controlled by the watchdog oscillator circuitry When the watchdog times out it generates a signal that causes the piezo power loss alarm speaker to emit a tone The timeout also causes the display to go blank and generates a reset to U3 The tone continues until the watchdog is cleared by activity on the CLRWD signal line pressing the ALARM SILENCE button removing power from the circuit Timer U21 also switches the backup battery power from U20 to RAMs U13 and U 23 the processor power fail circuitry when the 5V supply is below its lower limit Processor Power Fail Circuitry This circuitry sounds the piezo speaker if the processor fails to operate or the 5V power unexpectedly falls below its lower regulation limit e Connectors This section describes UIF connectors and pinouts other than the docking connector J 13 J 8 J 8is a 40 pin daughter board connector that interfaces the UIF module to the comm
67. ayed in the HEART PULSE RATE display Rotate the knob to display the following functions 0 ECG POST TEST line high 1 ECG POST TEST line low 2 Lead selection is set to OFF and a 100 ms pulse is transmitted out the ECG POST TEST line each time the UPPER ALARM LIMIT button is pressed 3 Lead selection is set to OFF and a 100 ms pulse is transmitted out the ECG POST TEST line once a second Press the UPPER ALARM LIMIT button to select the desired setting Press the LOWER ALARM LIMIT button to return to the service mode steady state 4 3 33 Menu Item 45 Check ECG Cable Off Detection This function allows you to test the ECG cable off circuitry L F rom the service mode steady state select menu item 45 by rotating the knob until 45 appears in the Sp02 display Press the UPPER ALARM LIMIT button The current ECG cable status is displayed in the HEART PULSE RATE display OFF cableoff is detected ON nocableoff is detected Press the LOWER ALARM LIMIT button to select the setting and return to the service mode steady state 4 3 34 Menu Item 46 Check ECG Lead Off Detection 426 This function allows you to test the ECG lead off circuitry L F rom the service mode steady state select menu item 46 by rotating the knob until 46 appears in the Sp02 display Press the UPPER ALARM LIMIT button The current ECG lead status is displayed in the HEART PULSE RATE display OFF lead off is detected O
68. bed in menu item 32 Release the PRINT button 421 Section 4 Configuration Mode Service Mode and Alarm Active Function 8 Press the LOWER ALARM LIMIT button toreturn to the service mode steady state 4 3 23 Menu Item 35 SpO2 DM Gain Test This function allows you to validate sensors and or the operation of the SpO2 module L Connect the sensor to the N 3000 2 Verify that the SpO2 module is set for automatic operation using menu item 39 paragraph 4 3 27 3 Press the LOWER ALARM LIMIT button to return to the service mode steady state 4 From the service mode steady state select menu item 35 by rotating the knob until 35 appears in the SpO2 display Press the UPPER ALARM LIMIT button 5 TheSpOz demodulator gain value from 0 to 6 is displayed in the HEART PULSE RATE display 6 Toadjust the gain rotate the knob The HEART PULSE RATE display will flash Pressing the UPPER ALARM LIMIT button will set the displayed value in the SpO2 module which will cease its automatic operation The HEART PULSE RATE display will stop flashing 7 Press and hold the PRINT button to display the SpO2 corrected IR and red output signals as described in menu item 32 Release the PRINT button 8 Press the LOWER ALARM LIMIT button to return to the service mode steady state 4 3 24 Menu Item 36 SpO2 P Gain Test 422 This function allows you to validate sensors and or the operation of the Sp02 module L Connect the sen
69. d the transistor approaches 70 C the circuit will signal the BQ2001 to stop charging When the transistor cools charging is resumed To protect the battery a thermal cutoff switch is located on the docking connector close to the lead acid battery compartment When the temperature in the battery compartment approaches 50 C the switch opens to prevent damage to the lead acid battery b Processor The processor for the UIF PCB is U3 a Motorola MC68331 IC This processor uses a 32 bit CPU and contains several submodules including pulse width modulators internal RAM and a Queued Serial Module QSM The processor also contains a non multiplexed data address bus and input output timer pins The processor generates chip selects address lines data direction and data strobes for communicating with its peripherals over its bidirectional 16 bit data bus D15 through DO The chip select outputs are CSBOOT and CSO through CS8 The address lines are AO through A18 The data direction is generated by U3 on R W The data strobe for indicating valid data is generated on DS Using these control lines the processor is capable of reading from or writing to any of the peripherals attached to its data bus Data transfers are either 16 bit D15 through DO or 8 bit D15 through D8 A 32 679 kHz source clock signal for the processor is produced by stackbus adapter U14 from crystal Y 3 System clock frequency is chosen by software c Processor
70. de Table 5 6 Operational Performance Problems Recommended Action 1 The sensor may be damaged replace it Condition 1 ThePULSE AMEE OE indicano 2 If the condition still persists replace the seems to indicate a pulse but the digital displays show zeroes SpO2 or heart pulse rate values change rapidly PULSE AMPLITUDE indicator is erratic When the ECG cable is disconnected from the leads during operation there is no cable off alarm When the ECG leads are disconnected from the patient during operation there is no leads off alarm Monitor is functional for some of the ECG lead settings I II or LI but not all UIF PCB The sensor may be damp or may have been reused too many times Replace it An electrosurgical unit ESU may be interfering with performance Movethe N 3000 and its cables and sensors as far from the ESU as possible Plug the N 3000 power supply 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 Verify the performance with the procedures detailed in Section 3 If the condition still persists replace the UIF PCB Replace the cable with a known serviceable cable If the condition still persists replace the ECG PCB Replace the cable and leads with known serviceable cable and leads If the condition still persists rep
71. default 3 Press the LOWER ALARM LIMIT button to return to the service mode steady state Section 4 Configuration Mode Service Mode and Alarm Active Function 4 3 6 Menu Item 6 Total Operating Hours Report This report displays the total number of operating hours logged by the unit since it was produced 1 From the service mode steady state select menu item 6 by rotating the knob until 6 appears in the SpO2 display Press the UPPER ALARM LIMIT button The total number of operating hours is displayed in the SpO 2 and HEART PULSE RATE displays Possible values are from 0 to 999 999 hours 2 Press the LOWER ALARM LIMIT button to return to the service mode steady state 4 3 7 Menu Items 7 16 Error Log Record Report This report provides information regarding the last ten error codes recorded by the monitor the number of occurrences of that particular error and the number of operating hours at the last time the error occurred The error log has ten entries menu items 7 16 as indicated below Refer to Section 5 Troubleshooting and the Appendix for an explanation of error codes The following procedure is for Error Log Record 1 menu item 7 Use the same procedure to access Error Log Records 2 through 10 menu items 8 through 16 1 From the service mode steady state select menu item 7 by rotating the knob until 7 appears in the Sp02 display Press the UPPER ALARM LIMIT button The number 7 0 appears i
72. e control knob on the top of the monitor CW to increase the default volume CCW to decrease the default volume Release the AUDIBLE ALARM OFF button and the monitor returns to the configuration mode steady state 4 2 7 Default Alarm Silence Duration The default alarm silence duration may also be adjusted while in the configuration mode To do so E 4 2 8 Configuration Menu F rom the configuration mode steady state press and hold the AUDIBLE ALARM OFF button for 3 seconds or less The current default setting for the alarm silence duration appears in the HEART PULSE RATE display The SpO2 display indicates CF G while the AUXILIARY display indicates SEC seconds Note Pressing the AUDIBLE ALARM OFF button for more than 3 seconds without turning the knob causes the N 3000 to enter the Default Alarm Volume mode as described in paragraph 4 2 6 Use the control knob on the top of the N 3000 to adjust the default alarm silence duration Alarm silence duration choices are 30 SEC 60 SEC 90 SEC and 120 SEC The configuration menu allows you to configure the functions listed in Table 4 2 After accessing a menu item by pressing the UPPER ALARM LIMIT button if the knob is not turned and no button is pressed for a period of time equal to the timeout as listed in the table you will automatically return to the configuration menu steady state The last setting displayed for the menu item will become the de
73. e monitor Ensure that the monitor is not connected to AC power With the N 3000 turned off press the ON STANDBY button and verify that the BATTERY IN USE BATTERY LOW indicator lights after the power on self test is completed The monitor must operate for at least 4 hours The BATTERY IN USE BATTERY LOW indicator will start to flash about 15 minutes before the battery fully discharges Allow the monitor to operate until it automatically powers down due to the low battery If the monitor passes this test immediately recharge the battery paragraph 3 3 2 steps 1 3 Perform this procedure to fully charge the battery or after the Battery Operation Test paragraph 3 3 1 This procedure should also be performed if possible before repair work is attempted 1 Connect the monitor to an AC power source using the external power supply Verify that the monitor is off and that the BATTERY CHARGING indicator is lit Charge the battery for at least 14 hours Noe TheBATTERY CHARGING indicator is timed to go out when the N 3000 has been connected to AC power for approximately 14 hours with no power interruptions An illuminated BATTERY CHARGING indicator is not necessarily an indication that the battery contains less than a full charge It is merely used as a timer to indicate that the battery has been continuously charging for less than 14 hours If unsure whether the battery is functioning properly perform the procedure in
74. e Call 3 3V oahWNM b Alarm Active 3 3V Power Isolated alarm active or 3 3 volt power is selectable as a 500mA fused output on J 1 Pin 6 Placing switch block SW3 S1 to the on position and S2 S3 S4 to the OFF position will select the alarm active signal on J 1 Pin 6 The alarm active signal provided is a normally open relay that shorts Pin 6 J 1 to Pin 4 J 1 signaling an alarm event To select isolated 3 3 volt power place switch SW3 S1 to the OFF position and S2 S3 S4 to the on position This provides up to 100mA of 3 3 volt power The N 3000 display board is the assembly that contains the front panel display for the monitor The display board is connected to and controlled by the UIF module The display board block diagram is shown in Figure S4 5 Digital Displays J Spo2 a Heart Pulse Rate o o Synchronous Display Serial Interface Driver a Auxiliary Indicators Motion Pulse Search LJ Audible Alarm Off Stacked Neonatal Patient Motion i Leads off ECG Heart Rate 1 Pulse Amplitude Indicator Five Volt Supply Power On L Battery In Use Battery Low L Battery Charging Geena Ghats Shera chee ord che Granade ege EE d whee ah Battery Bus Upper Alarm Limit A D Converter Lower Alarm Limit O Print i On Off Circuitry P On Standb
75. e Q10 Other sources of interrupt from the BQ2001 are a low voltage from lithium battery BT1 the application or removal of CHARGEBUS power and the lead acid battery voltage falling below a threshold preset by the processor When the SPS power supply is connected to the lower docking connector and connected to AC CHARGEBUS has a voltage of 15V 0 75V This powers the battery charge overcurrent and overtemperature circuitry The BQ2001 controls battery charging When the processor senses that the battery needs charging it tells the BQ2001 to turn on transistor Q5 for a programmed length of time The BQ2001 will continue charging the battery as long as there is CHARGE BUS available and its internal charge time register has not expired regardless of the mode of the N 3000 unless it is told to stop by the processor or it senses that the over temperature circuit has tripped S 9 Technical Supplement S 10 The battery charging circuitry is a constant voltage charger When the battery is discharged its output voltage is low about 10V and the maximum charge rate approximately 350mA is applied to it As the battery charges its output voltage rises reducing the amount of current delivered to it by CHARGE BUS When the battery is fully charged about 14V the charge rate decreases to 0 mA The over temperature cutoff circuitry is physically located close to the power transistor used to charge the battery by the BQ2001 When the area aroun
76. e light emitting diodes LEDS in the oximetry sensor serve as light sources a photodiode serves as the photo detector Because oxyhemoglobin and deoxyhemoglobin differ in light absorption the amount of red and infrared light absorbed by blood is related to hemoglobin oxygen saturation To identify the oxygen saturation of arterial hemoglobin the monitor uses the pulsatile nature of arterial flow During systole a new pulse of arterial blood enters the vascular bed and blood volume and light absorption increase During diastole blood volume and light absorption reach their lowest point The monitor bases its SoO2 measurements on the difference between maximum and minimum absorption that is measurements at systole and diastole By doing so it focuses on light absorption by pulsatile arterial blood eliminating the effects of nonpulsatile absorbers such as tissue bone and venous blood Automatic Calibration Because light absorption by hemoglobin is wavelength dependent and because the mean wavelength of LEDs varies an oximeter must know the mean wavelength of the sensor s red LED to accurately measure SpO 2 During manufacturing a resistor in the sensor encodes the mean wavelength of the red LED During monitoring the instrument s software reads this resistor and selects coefficients that are appropriate for the wavelength of that sensor s red LED these coefficients are then used to determine SpO 2 This resistor is read when th
77. e monitor is turned on periodically thereafter and each time a new sensor is connected Additionally to compensate for differences in tissue thickness the intensity of the sensor s LEDs is adjusted automatically S 1 Technical Supplement 2 2 Functional Versus Fractional Saturation This monitor measures functional saturation oxygenated hemoglobin expressed as a percentage of the hemoglobin that can transport oxygen It does not detect significant amounts of dysfunctional hemoglobin such as carboxyhemoglobin or methemoglobin In contrast hemoximeters such as the IL 482 report fractional saturation oxygenated hemoglobin expressed as a percentage of all measured hemoglobin including measured dysfunctional hemoglobins To compare functional saturation measurements to those from an instrument that measures fractional saturation fractional measurements must be converted as follows i fractional saturation functional saturation x100 100 carboxyhemoglobin methemoglobin S2 3 Measured Versus Calculated Saturation When saturation is calculated from a blood gas partial pressure of oxygen PO 2 the calculated value may differ from the SpO 2 measurement of a pulse oximeter This usually occurs because the calculated saturation was not appropriately corrected for the effects of variables that shift the relationship between PO2 and saturation Figure S2 1 pH temperature the partial pressure of carbon dioxide
78. e the upper alarm limit value rotate the knob on top of the monitor or if stacked with an N 3200 in the configuration mode the knob on the N 3200 Y ou cannot decrease the value lower than the current SpO2 lower alarm limit default setting The SpO 2 upper alarm limit cannot be set higher than 100 Return to configuration mode steady state Note If you press the LOWER ALARM LIMIT button before the 3 second timeout you can then change the SpO2 lower alarm limit default If you press the UPPER ALARM LIMIT button you can then change the pulse rate upper alarm limit default This method can also be used while setting the other default alarm limits 4 2 3 Default SpO2 Lower Alarm Limit 1 2 3 From the configuration mode steady state press and release the LOWER ALARM LIMIT button The current default value is displayed in the SpO 2 display To change the lower alarm limit default value rotate the knob on top of the monitor You cannot increase the value higher than the current SpO 2 upper alarm limit setting The SpO2 default lower alarm limit cannot be set lower than 80 Return to configuration mode steady state 4 2 4 Default Heart Pulse Rate Upper Alarm Limit 1 3 From the configuration mode steady state press the UPPER ALARM LIMIT button twice within 3 seconds The current default value is displayed in the HEART PULSE RATE display Dashes appear in the SpO 2 display the upper horizontal segments of the dis
79. eeeeeeseeneeseeeecsaees saaeseaaeesenees 3 18 3 4 1 Ground Integrity ET 3 18 3 4 2 Electrical Leakage sirieias 3 18 3 4 2 1 Chassis Source Current ccccccccccsesssseeeee cesstaeeeeees 3 18 3 4 2 2 Patient Source Current ccccccccseeeeeee ceeeeeesereneaes 3 19 3 4 2 3 Patient Sink CUIeNt cc cccccccececee ceseeeeeeeeeeeeeeeees 3 20 BD GPO NT SSS T ATA eene dee Ee 3 20 3 5 1 RCAL ele TN RTE 3 20 3 5 2 LED Drive Tee 3 21 3 6 Piezo Speaker eet ek etu ee dein EE det rae 3 22 Table of Contents Section 4 Configuration Mode Service Mode and Alarm Activa FUNCTIONS eene eege cede de ioc Ee ee EEN 4 1 iaiigala Tee Lu EE 4 2 Configuration Mode cccccceceeeeeeeeee ceeeeeeeaeeeeaeeeeaeeseeeeeeieee eae 4 2 1 Adult Neonatal Mode Default ee eeeeesne nen 4 2 2 Default SoO2 Upper Alarm Limnt es 4 2 3 Default SoO2 Lower Alarm Limnt es 4 2 4 Default Heart Pulse Rate Upper Alarm Limit 4 2 5 Default Heart Pulse Rate Lower Alarm Limit 4 2 6 Default Alarm Volume ssssssssesssiessssrnsssrrnrssrrrssrrenssne 4 2 7 Default Alarm Silence Duration ccccceeeeeeee ee 4 2 8 Configuration Men cccccceeeeeeseeceeee eeeeeeeseeeeeeeeeaes 4 2 8 1 Pulse Tone Volume 000 eee eeeeeeeeeeneeeee ceeeeeeeeeeeeeeeeeaes 4 2 8 2 UIF Software Version Report cccceseeeeeeeeceeeees 4 2 8 3 SpO2 Software Version Report cccceeeseeeseee eee 4 2 8 4 Serial
80. eonate Power On Defaults and Alarm Limit Ranges Note 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 steady state Turn the monitor on Press the NEW PATIENT NEONATAL button on the rear panel two times rapidly twice within 2 seconds Verify that the NEONATAL MODE indicator on the front pane is lit From the normal mode steady state press and release the UPPER ALARM LIMIT button Verify that the Sp02 display indicates an alarm limit of 95 for 3 seconds Verify that the other displays indicate a single bar at the top of each window while the 95 is displayed From the normal mode steady state press and release the UPPER ALARM LIMIT button Begin rotating the control knob CCW within 3 seconds Verify that the SpO 2 display reduces to a minimum of 80 From the normal mode steady state press and release the LOWER ALARM LIMIT button Verify that the Sp02 display indicates an alarm limit of 80 Verify that the other displays indicate a single bar at the bottom of each window while the 80 is displayed 35 Section 3 Performance Verification 7 10 11 12 13 14 15 From the normal mode steady state press and release the LOWER ALARM LIMIT button Rotate the control knob CCW Verify that the SpO 2 display reduces to a minimum of 20 Rotate the kn
81. ermodule connector The UIF board provides power to the SpO2 controller Stackbus and module synchronization lines are also routed through J 1 4 2 5 ECG Controller The ECG Controller processes and controls the ECG lead inputs to the N 3000 through the ECG PCB The central processing unit CPU for the ECG Controller PCB is microprocessor U1 a CPU Reset Voltage monitor U2 shown in the upper left hand corner of the schematic diagram generates the reset for U1 and other circuits on the PCB Reset is held low until Vcc raises above 4 6 volts After Vdd is above 4 6 volts reset is tri stated and pulled high by R10 Note L1 L2 and L3 provide filtering for Vdd b Program Memory EPROM The program memory chip U4 provides the ECG controller board with 128K bytes of memory This program boot ROM memory can be expanded up to 256K bytes The CSBOOT signal from U1 which is configured for 16 bit memory access provides the enable signal for U4 on the ROMENLL line After system software comes on or is booted up CSBOOT is configured for a start address of 0 a block length of 256K bytes both read and write access and is gated with AS This configuration provides a program memory range of 00000h through 3F FFF h The number of wait states needed before the CSBOOT signal is generated depends upon the U1 clock speed and the speed at which U4 can successfully perform its functions With the N 3000 the number of wait states must be set to 1
82. ester 3 3 5 1 Alarms 3 10 Operation with an ECG tester includes the following tests 3 3 5 1 Alarms 3 3 5 2 Volume Control 3 3 5 3 Dynamic Operating Range 3 3 5 4 Leads Off Detection Test Note This section is written using factory set default settings If your institution has preconfigured custom defaults those values will be displayed Factory defaults can be reset using the service mode procedure described in paragraph 4 3 11 Menu Item 20 Reset to Factory Defaults or the configuration mode procedure described in paragraph 4 2 8 6 With the monitor off connect the ECG leads RA LA and LL tothe appropriate jacks on the ECG tester Ndlcor Puritan Bennett ECG leads are color coded as follows Right arm RA International Red North American White Left arm LA International Yellow North American Black Left leg LL International Green North American Red Connect the leads to the SCE 10 ECG cable Connect the SCE 10 to the ECG input port on the N 3000 Set the ECG tester as follows PARAMETER SETTING HEART RATE 30 bpm AMPLITUDE 1 millivolt LEAD SELECT lI SINUS RHYTHM Normal MODE Adult Press the ON STANDBY button to turn the monitor on After the normal power up sequence verify that the HEART PULSE RATE display initially indicates zero and that the Sp02 and AUXILIARY displays are blank Verify the following monitor reaction a Theheart rate beep will be heard b After at least five
83. fault setting 44 Section 4 Configuration Mode Service Mode and Alarm Active Function Table 4 2 Configuration Menu Menu Paragraph Number Configurable Setting Described Timeout 0 Pulse tone volume 4 2 8 1 3 seconds 1 UIF software version report 4 2 8 2 10 seconds 2 SpO 2 software version report 4 2 8 3 10 seconds 3 Serial port baud rate 4 2 8 4 3 seconds 4 Trend type 4 2 8 5 3 seconds 5 Reset to factory defaults 4 2 8 6 N A 6 Primary heart pulse rate source 4 2 8 7 3 seconds 7 Pulse tone source 4 2 8 8 3 seconds 8 ECG lead selection 4 2 8 9 3 seconds 9 ECG pacer filter status 4 2 8 10 3 seconds 10 ECG low frequency filter status 4 2 8 11 3 seconds 11 ECG software version report 4 2 8 12 10 seconds To access the configuration menu from the configuration mode steady state press the UPPER and LOWER ALARM LIMIT buttons simultaneously The SpO 2 display indicates the menu number 0 through 11 and the PATIENT MOTION indicator is illuminated to indicate the monitor is in the configuration menu steady state Rotate the knob on top of the N 3000 to access the desired menu number Press the UPPER ALARM LIMIT button to configure the displayed item using the procedures listed in paragraphs 4 2 8 1 through 4 2 8 6 To exit the configuration menu steady state and return to the configuration mode steady state press the LOWER ALARM LIMIT button or if there is no knob or button activity for 15 seconds you will automatically return to the
84. fl NELLCOR PURITAN BENNETT SERVICE MANUAL Nellcor Symphony N 3000 Patient Monitor SpO2 and ECG Capabilities To contact Nellcor Puritan Bennett s representative In the United States call 1 800 NELLCOR or 510 463 4000 outside the United States call your local Nellcor Puritan Bennett representative Caution Federal law U S restricts this device to sale by or on the order of a physician 0123 1996 Nellcor Puritan Bennett Incorporated All rights reserved 034 127A 0396 Corporate Headquarters Nellcor Puritan Bennett I nc 4280 Hacienda Drive Pleasanton California 94588 U S A Tel 510 463 4000 or 1 800 NELLCOR Fax 510 463 4420 U S Service Repair Center Nellcor Puritan Bennett I nc 2391 Fenton Street Chula Vista California 91914 U S A Tel 619 482 5000 European Office Nellcor Puritan Bennett Europe BV Hambakenwetering 1 5231 DD s Hertogenbosch The Netherlands Tel 31 73 6485200 Asia Pacific Office Nellcor Puritan Bennett HK Ltd Room 1602 E vergo House 38 Gloucester Road Wanchai Hong Kong Tel 852 2529 0363 Regional Local Offices Nellcor Puritan Bennett UK Ltd 10 Talisman Business Centre London Road Bicester Oxfordshire OX6 0J X United Kingdom Tel 44 1869 322700 Nellcor Puritan Bennett Belgium NV SA Interleuvenlaan 62 8 Zone 2 B 3001 Heverlee Belgium Tel 32 16 400467 Nellcor Puritan Bennett F rance Sarl 21 rue Albert Calmette 78353 J ouy en
85. goes out and the PULSE SEARCH indicator illuminates This indicates that you are now in a submenu of the selected main menu item Use the knob to move from one submenu item to the next Not all menu items have submenu selections Toreturn to the service mode steady state from a menu item press the LOWER ALARM LIMIT button Menu item 3 Button Test is an exception it is exited by rotating the knob To exit the service mode power down the monitor by pressing the ON STANDBY button The N 3000 is automatically powered down if no action is taken for approximately 5 minutes Main menu items available from the service mode steady state are discussed in numerical order as indicated in Table 4 3 Section 4 Configuration Mode Service Mode and Alarm Active Function Table 4 3 Service Mode Steady State Main Menu Paragraph Type of Report Test Described Software Version Report 4 3 1 2 Knob and Lamp Test 4 3 2 Button Test 4 3 3 4 Speaker Tet JL A24 5 Internal Configuration Code ICC Report 4 3 5 Total Operating Hours Report 4 3 6 4 3 7 4 3 7 4 3 7 4 3 7 4 3 7 18 4 3 9 4 3 10 4 3 11 4 3 12 22 4 3 13 4 3 14 4 3 15 4 3 16 4 3 17 SpO2 RCAL Report 4 3 18 SpO2 IR and Red Offset Report 4 3 19 SpO2 IR and Red Offset Report 4 3 20 4 3 21 4 3 22 4 3 23 36 4 3 24 4 3 25 4 3 26 SpO2 Enable Automatic Operation 4 3 27 19 20 21 23 25 28 2 i8 8 20 E 22 ES 25 28 30 3
86. have completed self calibration 4 23 Section 4 Configuration Mode Service Mode and Alarm Active Function 3 Press the LOWER ALARM LIMIT button toreturn to the service mode steady state 4 3 27 Menu Item 39 SpO2 Enable Automatic Operation This function allows you to enable or disable the SpO2 module automatic operation mode 1 2 Connect the sensor to the N 3000 From the service mode steady state select menu item 39 by rotating the knob until 39 appears in the Sp02 display Press the UPPER ALARM LIMIT button Observe the SpO2 automatic operation setting of OFF or ON in the HEART PULSE RATE display OFF SpO2 module is not in automatic operation ON Sp02 module is in automatic operation Rotate the knob to change the display and turn automatic operation ON or OFF Press the LOWER ALARM LIMIT button toreturn to the service mode steady state 4 3 28 Menu Item 40 Set ECG Lead This function allows you to change the ECG lead setting The power on default setting is not changed 1 From the service mode steady state select menu item 40 by rotating the knob until 40 appears in the Sp02 display Press the UPPER ALARM LIMIT button The currently selected ECG lead is displayed in the HEART PULSE RATE display 0 OFF 1 lead LA RA 2 lead II LL RA 3 lead III LL LA Rotate the knob to the desired ECG lead setting Press the LOWER ALARM LIMIT button toreturn to the
87. heart rate of 60 5 bpm Repeat the process for the LA and RA leads The following tests are an overall performance check of the system 3 3 6 1 LED Excitation Test 3 3 6 2 ECG Cable Off and Lead Off Test 3 3 6 3 Operation with a Live Subject 3 3 6 4 Serial Interface Test 3 3 6 1 LED Excitation Test This procedure uses normal system components to test circuit operation A Nellcor Puritan Bennett Oxisensor II 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 aA Dm A Ww 10 Connect the monitor to an AC power source through the SPS power supply Connect an SCP 10 sensor input cable to the monitor Connect a D 25 sensor to the sensor input cable Press the ON STANDBY button to turn the monitor on Leave the sensor open with the LEDs and photodetector visible After the monitor completes its normal power up sequence verify that the sensor LED is brightly lit Slowly move the sensor LED in proximity to the photodetector element of the sensor Verify as the LED approaches the optical sensor that the LED intensity decreases Open the sensor and notice that the LED intensity increases Repeat step 7 and the intensity will again decrease This variation is an indication that the microprocessor is in proper control of LED intensity Turn the N 3000 off 3 13 Section 3 Performance Verification
88. heartbeats the monitor displays a heart rate of 30 5 bpm CG Theaudioalarm will sound and the HEART PULSE RATE display will flash indicating the heart rate is below the default lower alarm limit Press the AUDIBLE ALARM OFF BUTTON 10 11 Section 3 Performance Verification Increase the heart rate setting on the ECG tester to 240 bpm Verify that the heart rate beep increases its frequency and the HEART PULSE RATE display value increases Verify that the So02 and AUXILIARY displays are blank After at least five heartbeats verify that the monitor displays a heart rate of 240 5 bpm Verify that the audio alarm sounds and the HEART PULSE RATE display flashes indicating that the heart rate is above the default upper alarm limit Press and hold the AUDIBLE ALARM OFF button Rotate the control knob clockwise CW until the display indicates OFF Release the button The alarm is silenced and the AUDIBLE ALARM OFF indicator flashes After approximately 3 minutes and every 3 minutes thereafter the alarm silence reminder will beep three times while the alarm is silenced 3 3 5 2 Heartbeat Tone Volume Control 1 From the normal mode steady state rotate the control knob CW and verify that the beeping heartbeat tone sound level increases Rotate the control knob CCW and verify that the beeping pulse tone can be turned off completely Rotate the knob CW until a comfortable audio level is attained 3 3 5
89. hospital transport when powered by its internal battery The N 3000 can operate as a standalone monitor or it can be connected to stacked with other Nealcor Symphony instruments such as the N 3100 blood pressure monitor and N 3200 display printer When used with the N 3200 display printer the instruments can display and print out ECG and plethysmographic waveforms and SpO2 pulse rate and heart rate tabular data The physical and operational characteristics of the monitor are described in the operator s manual and Section 9 Specifications of this manual Figures 1 1 and 1 2 depict the International and North American front panels of the N 3000 and the names of its displays and controls Noe All graphics relevant to the monitor are depicted in this manual in the international symbol format Refer to your operator s manual and Figures 1 1 and 1 2 of this manual for applicable translations 1 1 Section 1 Introduction 20 19 18 17 16 15 1413 12 11 10 Figure 1 1 N 3000 Front Panel International 1 Sp02 display 11 PRINT button 2 PULSE AMPLITUDE indicator 12 BATTERY IN USE BATTERY LOW indicator 3 ECG HEART RATE indicator 13 BATTERY CHARGING indicator 4 HEART PULSE RATE display 14 LINKED indicator 5 AUXILIARY display 15 RF LOCKED indicator 6 NEONATAL MODE indicator 16 LOWER ALARM LIMIT button 7 AUDIBLE ALARM OFF indicator 17 UPPER ALARM LIM
90. in Useservice mode menu item number 18 to evaluate the status of the lithium backup battery If necessary power down the monitor and replace the lithium backup battery If the error code still appears power down the monitor and replace the UIF PCB 1 Turn the monitor off then on again If the error code still appears turn off the monitor Verify that the SpO2 Module ROM is securely seated in the socket Verify that the SpO2 Controller PCB is securely seated 4 Turn the monitor on If the error code still appears replace the SpO2 Controller PCB If the error code still appears power down the monitor and replace the UIF PCB Use the service mode menu item 20 to reset the default values to factory default values as discussed in Section 4 Configuration and Service M odes If the error code still appears power down the monitor and replace the UIF PCB If the error code still appears power down the monitor and replace the SpO 2 Controller PCB 1 Turn the monitor off then on again If the error code still appears and the N 3000 is stacked with another instrument turn all stacked instruments off and then on again 5 5 Section 5 Troubleshooting Table 5 3 N 3000 Failure Error Codes Continued Recommended Action 178 191 Turn the monitor off then on again If the error code still appears use the service mode menu item 20 to reset the default values to factory default
91. in the tolerances listed in step 1 Move the MODULATION switch to LOW and verify that after a few seconds the monitor indications are within the tolerances listed in step 1 Move the LIGHT switch to HIGH 2 and verify that after a few seconds the monitor indications are within the tolerances listed in step 1 Move the MODULATION switch to HIGH and verify that after a few seconds the monitor indications are within the tolerances listed in step 1 10 11 12 13 14 15 16 17 18 Section 3 Performance Verification Move the RATE switch to 112 bpm After approximately 30 seconds verify that the HEART PULSE RATE display has stopped flashing and that the display indications are within the tolerances shown below Oxygen Saturation Range 79 to 83 Pulse Rate Range 110 to 114 bpm Note Ifthe unit has been configured for the latching alarm ON setting the HEART PULSE RATE display continues to flash despite the pulse rate being within upper and lower alarm limits Press the AUDIBLE ALARM OFF button to stop the flashing Refer to paragraph 4 3 13 to place the unit in the latching alarm OFF setting Move the MODULATION switch to LOW and verify that after a few seconds the monitor indications are within the tolerances listed in step 6 With the LIGHT switch set to HIGH 2 verify that after a few seconds the monitor indications are within the tolerances listed in step 6 Move the MODULATION switch to H
92. ing circuit setting of OFF or ON in the HEART PULSE RATE display OFF battery charging circuit disabled ON battery charging circuit enabled To enable or disable the battery charge circuit rotate the knob until the desired setting is displayed flashing Press the UPPER ALARM LIMIT button Press the LOWER ALARM LIMIT button toreturn to the service mode steady state 4 3 17 Menu Item 29 Instrument Compatibility Report This function allows you to determine the cause of an instruments not compatible error message L F rom the service mode steady state select menu item 29 by rotating the knob until 29 appears in the Sp02 display Press the UPPER ALARM LIMIT button The number 29 0 appears in the Sp02 display The number in the HEART PULSE RATE display is the sensorbus protocol version and revision number of the N 3000 Rotate the knob until 29 1 appears in the SpO 2 display Press the UPPER ALARM LIMIT button The number in the HEART PULSE RATE display is the multicast version and revision number of the N 3000 Press the LOWER ALARM LIMIT button toreturn to the service mode steady state 4 3 18 Menu item 30 SpO2 RCAL Report This function allows you to check the sensor RCAL value readings 1 2 Connect the SRC 2 tester or a compatible sensor to the N 3000 Select menu item 30 by rotating the knob until 30 appears in the SpO 2 display Press the UPPER ALARM LIMIT button
93. ing time correctly 1 From the service mode steady state select menu item 19 by rotating the knob until 19 appears in the SpO2 display Press the UPPER ALARM LIMIT button The persistent time in seconds is displayed in the Sp02 and HEART PULSE RATE displays F or example 001 688 indicates that the monitor has been powered on for 1 688 seconds 28 minutes 8 seconds Make a note of the displayed time If the display reads 999 999 this indicates that persistent time is greater than or equal to 999 999 seconds If dashes are displayed the contents of the memory of the persistent time circuit are lost This can occur when the backup lithium battery has been replaced Using a watch or other timepiece wait 3 minutes Subtract the first figure you noted from the figure now displayed on the N 3000 The difference should equal approximately 3 minutes 180 seconds Press the LOWER ALARM LIMIT button toreturn to the service mode steady state Section 4 Configuration Mode Service Mode and Alarm Active Function 4 3 11 Menu Item 20 Reset to Factory Defaults This function allows you to reset the monitor to the factory default settings see the Specifications section of this manual From the service mode steady state select menu item 20 As soon as you press the UPPER ALARM LIMIT button the default settings are reset Any preset configurable alarms are now lost When the default settings are reset the monitor wil
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95. ion to station The station holding the token has the exclusive right to transmit onto the stackbus but the right to transmit may be temporarily donated to another station to acknowledge a transmission by the token holder The token holder must relinquish control of the stackbus by passing the token to the next station on the loop within a specified period of time During normal operation the right to access the stackbus passes from station to station in a continuous consistent manner All instruments participate in the loop when stacked and powered on Maintenance of the token passing loop initialization lost token recovery and the addition of new stations is implemented in the N 3000 s UIF and SpO2 modules and in the N 3100 by specialized devices and system software S4 CIRCUIT ANALYSIS This section provides a descriptive overview of the N 3000 modular design as well as a circuit description 4 1 Functional Overview The monitor functional block diagram is shown in Figure S4 1 Central to the PCB modules is the UIF module This module receives power from an external AC source or battery via the docking connector It supplies power to the other modules connected to it while also communicating with them via the stackbus It controls user interface and network gateway functions Connected to the UIF module is the SpO2 module which consists of two PCBs the SpO2 Controller and the SpO2 PCB The SpO2 Controller board contains the mic
96. isplayed in the AUXILIARY display and 37 is displayed in the SpO2 digital display 4 Rotate the knob to select other settings 1 zero setting 2 system test setting If the displayed value is different from the current SpO2 value the display will flash Pressing the UPPER ALARM LIMIT button will set the displayed value in the SpO2 module which will cease its automatic operation 5 Press the LOWER ALARM LIMIT button to return to the service mode steady state 4 3 26 Menu Wem 38 SpO2 A D Cal Line Test This function allows you to verify calibration of the SpO2 A D converter L F rom the service mode steady state select menu item 38 by rotating the knob until 38 appears in the Sp02 display Press the UPPER ALARM LIMIT button Observe the PULSE RATE display The possible values 0 1 2 or 3 indicate the following status 0 Indicates that both A D converters are undergoing self calibration which will take approximately 3 seconds A value of 0 after the 3 second period indicates that both converters have failed self calibration 1 Indicates that the IR A D converter has completed self calibration and the red A D is still undergoing self calibration or has failed self calibration 2 Indicates that the red A D converter has completed self calibration and the IR A D is still undergoing self calibration or has failed self calibration 3 Indicates that both converters
97. l beep three times and automatically return to the service mode steady state If the reset was not successful an error code will be displayed 4 3 12 Menu Item 21 Initial Cluster Instrument Number Report This report displays a hexadecimal number corresponding to the initial internal stack address when the instrument is being used in a stack configuration with an address conflict Such a conflict may occur when identical instrument types for example two N 3100s are in the same stack L F rom the service mode steady state select menu item 21 by rotating the knob until 21 appears in the Sp02 display Press the UPPER ALARM LIMIT button The two left most digits in the HEART PULSE RATE display are the hexadecimal representation of the cluster instrument number H for hexadecimal is displayed as the right most digit of the HEART PULSE RATE display If the displayed value is different than the EEPROM value the display will flash Rotate the knob to adjust the cluster instrument number to the desired value Press the UPPER ALARM LIMIT button to accept the displayed value as the default value The display stops flashing Press the LOWER ALARM LIMIT button toreturn to the service mode steady state 4 3 13 Menu Item 22 Latching Alarms This function allows you to disable or enable the latching alarm feature The factory default setting is latching alarm disabled 1 From the service mode steady state select menu ite
98. lace the ECG PCB Replace the cable and leads with known serviceable cable and leads If the condition still persists replace the ECG PCB 59 Section 5 Troubleshooting 5 6 6 Stacked Operation Table 5 7 lists symptoms of problems encountered while in the stacked configuration with the N 3100 and recommended actions Refer to the N 3100 service manual for more troubleshooting information For problems encountered while stacked with the N 3200 refer to the N 3200 service manual Table 5 7 Stack Problems Condition 1 BATTERY IN USE BATTERY LOW indicators on the N 3000 and N 3100 light steadily while they are connected to AC via the external power supply Both units are operational BATTERY IN USE BATTERY LOW indicators on the N 3000 and N 3200 light steadily while they are connected to AC Both units are operational BATTERY IN USE BATTERY LOW indicators on the N 3000 light steadily but N 3100 and or N 3200 does not while they are connected to AC The units are operational BATTERY IN 510 USE BATTERY LOW indicators on the N 3100 or N 3200 light steadily but N 3000 does not while they are connected to AC via the external power supply Both units are operational Recommended Action Ensurethat the SPS power supply is plugged into an operational AC outlet If it is and the green indicator light is not lit replace the power supply If the green SPS indicator i
99. lay reduces toa minimum of 40 Press the LOWER ALARM LIMIT button two times rapidly Verify that the HEART PULSE RATE display indicates an alarm limit of 40 for 3 seconds 10 11 12 13 14 15 16 Section 3 Performance Verification From the normal mode steady state press the LOWER ALARM LIMIT button two times rapidly Rotate the control knob CCW Verify that the HEART PULSE RATE display reduces to a minimum of 30 Press the AUDIBLE ALARM OFF button located on top of the N 3000 and verify that the monitor emits a low pitched beep when the button is pressed Press the ON STANDBY button to turn the monitor off Verify that the monitor emits three decreasing pitch beeps Observe the monitor front panel Press the ON STANDBY button The monitor performs the sequence described in paragraph 3 3 3 1 Power On Self Test 3a through 3g Press and release the UPPER ALARM LIMIT button Verify that the SpO 2 display indicates an alarm limit of 100 Press and release the LOWER ALARM LIMIT button Verify that the SpO 2 display indicates an alarm limit of 85 Press the UPPER ALARM LIMIT button two times rapidly Verify that the HEART PULSE RATE display indicates an alarm limit of 170 Press the LOWER ALARM LIMIT button two times rapidly Verify that the HEART PULSE RATE display indicates an alarm limit of 40 Press the ON STANDBY button to turn the monitor off 3 3 3 3 N
100. le bar at the top of each window while the 100 is displayed SpO2 Oy min Imm J UU At the end of the 3 seconds the displays indicate dashes normal mode steady state Press and release the UPPER ALARM LIMIT button Begin rotating the control knob counterclockwise CCW within 3 seconds Verify that the SpO 2 display reduces to a minimum of 85 Note A decimal point in the display indicates that the alarm limits have changed Press and release the LOWER ALARM LIMIT button Verify that the monitor emits a single beep and the SpO2 display indicates an alarm limit of 85 for 3 seconds Verify that the other displays indicate a single bar at the bottom of each window while the 85 is displayed From the normal mode steady state press and release the LOWER ALARM LIMIT button Begin rotating the control knob CCW within 3 seconds Verify that the SpO 2 display reduces to a minimum of 20 Rotate the control knob clockwise CW and verify that the Sp02 display cannot be raised past the upper alarm limit setting of 85 Press the UPPER ALARM LIMIT button two times rapidly twice within 3 seconds Verify that the monitor emits two beeps and the HEART PULSE RATE display indicates an alarm limit of 170 for 3 seconds From the normal mode steady state press the UPPER ALARM LIMIT button two times rapidly Begin rotating the control knob CCW within 3 seconds Verify that the HEART PULSE RATE disp
101. lock Diagram S 19 Display Board Block Diagram sssssssesssssrssssrrssesrrrrssrirrssrnnssrrnnsns S 20 Serial Port Voltages cccccceceeeeeeeeeeeeee sensstnsssessnestntrtnstnnesnne srennnnnt 3 17 ECG Cable Resistances AA 3 18 Configuration Mode Men 4 2 ei le Ee E TTT 4 5 Service Mode Steady State Main Men 4 11 Service Mode Steady State Main Menu Continue 4 12 Problem Categories ccccccessceceseceeee ceeaeeeaeeeeeeeeeeeeseaeeesees caeeeeaees 5 2 le VE teen EE 5 3 N 3000 Failure Error Codes cccccccceeeeeeeeseeeee ceceeeeeaeeesaeeseeeteenees 5 5 Buttons Knob Problems AAA 5 7 Display AlarMS Probleme AAA 58 Operational Performance Problems ceeeeeeeteneeees 5 9 Stack Problems ccccceceeeeeeeeeeceee ceeeeeeeaeeseeeeceeeesaeesaee seaeesseeeeeaees 5 10 Serial Port Problems s iiron ienee eh iene dee iienaa Eaa a 5 12 EnO TYPOS ee nae TEE A 2 N 3000 User Correctable Error Codes c ccceeeeeceeeeeeeeeeeeeeeeaees A 3 N 3000 Failure Error Codes cccccecceeeseeeeneeeee ceeeeeeeaeeesaeeseneeennees A 3 N 3000 Internally Corrected Error Codes ccsccccccsteeeseseeeeeeees A 4 J13 Inter Stack Conmnechor 0 2 eeececeeeeeeeeeeeeee tee ceeeeeeeeaeeeaeeteaeeeeeeeaas S 9 Rente NET S 13 J12 J22 Inter Module Connector cccccceeeeeeeeeeee seeeeeeeeeeeeeeeeeens S 14 J5 Display Connect 0 2 cecececcceceeeeeceeee ceeeeeeeeeeeeeseaeeesaeseeaeeeee ceeaes S 15 J2 Speaker Connecho
102. lse Tone Source Menu item number 7 allows you to select the default heart pulse tone source Selecting SPO causes the pulse rate measured by an SpO2 sensor to provide the pulse tone Selecting ECG causes the heart rate measured by ECG leads to provide the pulse tone 1 From the configuration menu steady state rotate the knob until 7 is displayed in the Sp02 display Press the UPPER ALARM LIMIT button The current pulse tone source is displayed in the HEART PULSE RATE display ECG indicates that the source is the heart beat as measured with the ECG leads SPO indicates that the source is the pulse beat as measured by the SpO2 sensor To change the default setting rotate the knob until the desired setting is displayed Press the LOWER ALARM LIMIT button to return to the configuration menu steady state ECG Lead Selection Menu item number 8 allows you to select the default ECG leads option Selections are 1 lead LA RA 2 lead 11 LL RA or 3 lead III LL LA L From the configuration menu steady state rotate the knob until 8 is displayed in the Sp02 display Press the UPPER ALARM LIMIT button I 2 or 3 is displayed in the HEART PULSE RATE display To change the default setting rotate the knob until the desired setting is displayed Press the LOWER ALARM LIMIT button to return to the configuration menu steady state 4 2 8 10 ECG
103. m 22 by rotating the knob until 22 appears in the Sp02 display Press the UPPER ALARM LIMIT button Observe the enable disable latching alarm setting of OFF or ON in the HEART PULSE RATE display OFF latching alarm disabled ON latching alarm enabled To change the enable disable latching alarm setting rotate the knob until the desired setting is displayed flashing 417 Section 4 Configuration Mode Service Mode and Alarm Active Function A Press the UPPER ALARM LIMIT button to store the default setting 5 Press the LOWER ALARM LIMIT button to return to the service mode steady state 4 3 14 Menu Item 23 Enable Disable Alarm Silence Reminder This function allows you to disable or enable the alarm silence reminder feature The factory default setting is alarm silence reminder enabled 1 From the service mode steady state select menu item 23 by rotating the knob until 23 appears in the Sp02 display Press the UPPER ALARM LIMIT button 2 Observe the alarm silence reminder setting of OFF or ON in the HEART PULSE RATE display OFF alarm silence reminder disabled ON alarm silence reminder enabled 3 Tochange the alarm silence reminder setting rotate the knob until the desired setting is displayed flashing 4 Pressthe UPPER ALARM LIMIT button to store the default setting 5 Press the LOWER ALARM LIMIT button to return to the service mode steady state 4 3 15 Menu Item 25
104. n 2 The currently selected ECG low frequency filter status is displayed in the HEART PULSE RATE display OFF Filter is disabled 0 5 40 Hz bandwidth ON Filter is enabled 0 05 40 Hz bandwidth 3 Rotate the knob to the desired low frequency filter setting 4 Press the LOWER ALARM LIMIT button to select the setting and return to the service mode steady state 4 3 31 Menu Item 43 Set ECG Baseline Reset This function allows you to control the ECG reset switch for service mode testing The power on default setting is not changed 1 From the service mode steady state select menu item 43 by rotating the knob until 43 appears in the SpO2 display Press the UPPER ALARM LIMIT button 2 The currently selected reset position OFF or ON is displayed in the HEART PULSE RATE display 3 Rotate the knob to the desired ECG reset 4 Press the LOWER ALARM LIMIT button to select the setting and return to the service mode steady state 425 Section 4 Configuration Mode Service Mode and Alarm Active Function 4 3 32 Menu Item 44 ECG POST Test Signal This function allows you to send an internal test signal either singly or repetitively from the ECG module for service mode testing L F rom the service mode steady state select menu item 44 by rotating the knob until 44 appears in the Sp02 display Press the UPPER ALARM LIMIT button 44 0 is displayed in the Sp02 display 0 is displ
105. n the SpO 2 display 2 Read the error code in the HEART PULSE RATE display A value of 000 indicates that the menu item contains no error code If dashes are displayed the error log contents cannot be determined 3 Rotate the control knob CW to display 7 1 in the SpO 2 display 4 Read the number of occurrences of this particular error code in the HEART PULSE RATE display If 256 is displayed there have been 256 or more occurrences 5 Continue to rotate the control knob CW The total number of operating hours when the last instance of the error occurred is displayed in the SpO0 2 and HEART PULSE RATE displays 6 Press the LOWER ALARM LIMIT button to return to the service mode steady state 4 3 8 Menu Item 17 Instrument Identification IID Report This report displays a hexadecimal number corresponding to the instrument identifier This number should agree with the address label on the outside of the instrument However the label and the internal value may disagree if the monitor UIF module was replaced and the external label was not changed 1 From the service mode steady state select menu item 17 by rotating the knob until 17 appears in the SpO2 display Press the UPPER ALARM LIMIT button A hexadecimal number appears across the entire monitor display with an H in the last far right position 415 Section 4 Configuration Mode Service Mode and Alarm Active Function Verify that this
106. n the memory range of 60000h through 607F Fh The number of wait states to generate depends on the U1 clock speed The number of wait states for CS1 must be set to 2 based upon a CPU clock speed of 16 0 MHz Technical Supplement e Programmable Clock The clock frequency on the SpO2 controller board is programmed via software The dock signal is labeled CTRL_CLK The clock circuitry consists of U7 and U10 One half of U7 takes a 20 MHz input and produces three output frequencies 10 MHz 2 5 MHz and 1 25 MHz The 10 MHz frequency is the clock rate of the programmable down counter U10 The second half of U7 takes the terminal count TC output of U10 and converts it toa 50 duty cycle square wave The frequency of CTRL_CLK is controlled by an 8 bit number The bits of this number are split between two output ports The lower 5 bits of the number are programmed on the lower 5 bits of port C The upper 3 bits of the number are programmed on the upper 3 bits of port E The formula for the CTRL_CLK frequency is frequency 5MHz 1 TIME where TIME is the 8 bit number output by the CPU TIME has a valid range of 1 255 The circuit provides an adjustment range of 19 531 kHz to 2 5 MHz The CTRL_CLK signal is input back to U1 Pin 16 During the POST routine this pin is used to monitor the programmable clock hardware output to verify performance f Intermodule Connector The SpO2 controller board is connected tothe UIF board via the 1 int
107. nical Supplement Power switching and battery charging are controlled by U20 a BQ2001 power monitor IC The BQ2001 power monitor IC has three sources of power input CHARGEBUS from the SPS N or SPS I power supply the N 3000 lead acid battery or lithium battery BT 1 The ON STANDBY button is connected to BQ2001 which controls the gate of power transistor Q10 Processor U3 is also connected to BQ2001 receiving interrupts and reading data from the BQ2001 status registers when the N 3000 is on When the N 3000 is OFF standby mode and the ON STANDBY button is pressed the BQ2001 enables transistor Q10 and analog power from either the CHARGEBUS or the lead acid battery is supplied to the 5V regulator U17 and U 18 and the SpO2 module It also signals the processor with an interrupt that there is new data in its status registers for the processor to read As soon as the processor powers up and clears reset it will process the interrupt from the BQ2001 and begin to execute its program Table S4 1 J13 Inter Stack Connector Pin No Pin Description inpuvOutpuvPower Positive battery terminal fused Chassis case ground V0 SSES EC fe _ Charge bus 50 DREES When the N3000 is on and the ON STANDBY button is pressed the BQ2001 signals the processor via interrupt that there is data for the processor to read When the processor reads the status it determines that the unit should be turned off and signals the BQ2001 to disabl
108. nterface arenose eedd aiaia taeda 3 16 3 3 Serial Port Connector External Pin Locations ccsceeseeeee 3 16 3 4 N 3000 to External PC Connections eeseeeeeeeeees 3 17 3 5 ECG Cable Pin Locations seeeesseeseeeeeeee ternett teen rernrernssrnssrnsens 3 17 3 6 Battery Cover Hemoval ceeeeeeeeeeeeseeeeseaeeeeeetene nen 3 22 3 7 Speaker Test AER EE 3 23 4 1 Serial Port Pin Locations 4 29 6 1 Battery Replacement ccceccceceeeeeee ANEREN An 6 2 6 2 Removing the Battery AA 6 3 6 3 N S000 FUSES nite ege tetas iene aire degen 6 4 6 4 N 3000 Corner SCrews cccccccccesseeecseeeee cesaeeesenaeeeseesaeessenaeeeescaas 6 4 6 5 Opening the N 3000 Monitor ceeeeeeeeessaeeeeaeeeeaes 6 5 6 6 Handle Left Side Panel and Speaker Disassembly nnnnsnnn0snna0n 6 6 6 7 Rear Panel and SpO2 Module Disassembly eee 6 7 6 8 Communications PCB Removal ceeeeeeeeeeeeneeeees 6 8 6 9 Display PCB and UIF PCB Disassembly sssssessesneseesresr erereess 6 9 6 10 Knob Encoder Disassembly AA 6 10 6 11 Knob Disassembly anerian a a eE a E caaeeeeeaas 6 10 LIST OF TABLES Table of Contents N 3000 Expanded View 7 3 Repacking the MN 2000 8 1 Oxyhemoglobin Dissociation Curve cccccceceeeeeseeeeee eeeeeeeneeeeees S 2 N 3000 Functional Block Diagram sssessessssessssrrssrnenesrrrrsrernssrnens S 4 Timing Daora se sea eeii a aa a ae S 5 Internal External Stackbus Connechons eeren S 12 Communications Sub module B
109. number agrees with the number on the monitor external label If the number does not agree the number on the external label should be changed to agree with the displayed number Press the LOWER ALARM LIMIT button toreturn to the service mode steady state 4 3 9 Menu Item 18 Power Status This test allows you to determine battery conditions 4 From the service mode steady state select menu item 18 by rotating the knob until 18 appears in the Sp02 display Press the UPPER ALARM LIMIT button The number 18 0 appears in the Sp02 display The number shown in the HEART PULSE RATE display is the lead acid battery voltage to the nearest tenth of a volt Rotate the control knob CW until 18 1 appears in the Sp02 display The number shown in the HEART PULSE RATE display is the charge bus voltage to the nearest tenth of a volt Rotate the control knob CW until 18 2 appears in the Sp02 display The number shown in the HEART PULSE RATE display is the backup lithium battery voltage to the nearest tenth of a volt Note The control knob can be rotated until 18 3 appears in the SpO 2 display However the number shown in the HEART PULSE RATE display has no meaning and can be disregarded Press the LOWER ALARM LIMIT button to return to the service mode steady state 4 3 10 Menu tem 19 Persistent Time Sense Report 416 This report allows you to determine if the internal persistent time circuit is keep
110. ob CW to verify that the lower alarm limit cannot be raised past the upper alarm limit of 80 Press the UPPER ALARM LIMIT button two times rapidly twice within 3 seconds Verify that the HEART PULSE RATE display indicates an alarm limit of 190 Press the LOWER ALARM LIMIT button twice rapidly Verify that the HEART PULSE RATE display indicates an alarm limit of 90 Press the AUDIBLE ALARM OFF button and verify that the monitor emits a beep when the button is pressed Press the ON STANDBY button to turn the monitor off Press the ON STANDBY button to turn the monitor on The monitor performs the sequence described in 3 3 3 1 Note The NEO indicator will not be lit Press and release the UPPER ALARM LIMIT button Verify that the SpO 2 display indicates an alarm limit of 100 Press and release the LOWER ALARM LIMIT button Verify that the SpO 2 display indicates an alarm limit of 85 Press the ON STANDBY button to turn the monitor off This completes the power up tests 3 3 4 Operation with a Pulse Oximeter Tester 3 3 4 1 Alarms 36 Operation with an SRC 2 pulse oximeter tester includes the following tests 3 3 4 1 Alarms 3 3 4 2 Alarm Silence 3 3 4 3 Alarm Volume Control 3 3 4 4 Volume Control 3 3 4 5 Dynamic Operating Range Note This section is written using Nellcor Puritan Bennett factory set defaults If your institution has preconfigured custom defaults those values will be
111. omatically powers down if no action is taken for approximately 2 minutes After changing or viewing a default setting you can return tothe configuration mode steady state by allowing the display to timeout 3 seconds To exit the configuration mode turn the monitor off by pressing the ON STANDBY button Default settings take place when the monitor is turned off Default settings also take place if the N 3000 powers down due to the 2 minute timeout Note While changing default limits there must be some user interaction with the monitor within a 3 second period or the monitor will return to configuration mode steady state operation 41 Section 4 Configuration Mode Service Mode and Alarm Active Function Table 4 1 lists the default settings that can be configured and the respective entry procedures to access the settings Methods used to change the default settings are detailed in paragraphs 4 2 1 through 4 2 8 Table 4 1 Configuration Mode Menu Power on Default Button Press Procedure from Paragraph Setting Configuration Mode Steady State Described Adult Neonatal Mode NEW PATIENT NEONATAL button twice SpO2 U pper Alarm Limit UPPER ALARM LIMIT button SpO2 Lower Alarm Limit LOWER ALARM LIMIT button Pulse Rate U pper Alarm UPPER ALARM LIMIT button twice 4 2 4 Limit Pulse Rate Lower Alarm LOWER ALARM LIMIT button twice 4 2 5 Limit Alarm Volume ALARM SILENCE button press and 4 2 6 hold for 3 seconds bef
112. on Mode Service Mode and Alarm Active Function 4 3 39 Menu Item 62 Serial Port Transmit Test This test verifies that when the N 3000 is connected to a PC through the N 3000 serial port the serial port transmit hardware is functional Note The N 3000 must be operating from AC power to perform this menu item 1 Perform steps 1 through 4 as indicated in paragraph 4 3 38 menu item 61 2 Select menu item 62 by rotating the knob until 62 appears in the SpO 2 display Press the UPPER ALARM LIMIT button 3 Verify that a fixed pattern of bytes 0 through 255 is repeatedly sent on the transmit data line The characters are repeatedly sent on the transmit data line when menu item 62 is selected 4 Pressthe LOWER ALARM LIMIT button to return to the service mode steady state Caution Menu items 70 and above are for factory purposes only Adjustment of menu items 70 and above by other than qualified factory personnel may cause the N 3000 to malfunction 44 ALARM ACTIVE FUNCTION The N 3000 alarm active function allows low medium or high priority alarms to be monitored from a remote location via the N 3000 serial port Alarm monitoring also applies to an attached active N 3100 or N 3200 This function is automatically enabled during the power on cycle when the monitor is operating from AC power Pin 6 on the serial port is open when no alarms are active Alarm activity results in pin 6 shorting to ground The pin will
113. on self test 3 When SEr begins flashing in the AUXILIARY display release the UPPER and LOWER ALARM LIMIT and PRINT buttons A Press the PRINT button You must press this button within 15 seconds or the monitor will turn off automatically You are now in service mode steady state 49 Section 4 Configuration Mode Service Mode and Alarm Active Function 410 Note Failure errors refer to Troubleshooting section for an explanation of failure errors and error codes may be encountered by the N 3000 upon entering the service mode The N 3000 will automatically access the menu item used to correct this situation If a user correctable error code a code beginning with O is displayed while in the service mode press the LOWER ALARM LIMIT button to clear the error e SEr stops flashing and is continuously displayed e Thenumber 1 is indicated in the Sp02 display e ThePATIENT MOTION indicator is lit indicating that you are in the service mode steady state with access to the main menu as indicated in Table 4 3 MM Use the knob to move from one main menu item to the next While in service mode the UPPER and LOWER ALARM LIMIT buttons are used as enter and exit buttons respectively You must press the UPPER ALARM LIMIT button to select a main menu item and move to the submenu level When you have scrolled to the desired menu item press the UPPER ALARM LIMIT button The PATIENT MOTION indicator
114. onnector and plugged into an AC outlet When the UIF processor detects that CHARGE BUS is available it enables isolation transformer driver U1 MAX253 This creates power for circuitry on the isolated host computer side of the module Transmit and Receive data cross the barrier through optical isolators U5 and U3 6N136 CTS and RTS signals cross the barrier through optical isolators U4 and U2 4N 26 Isolation transformer Transmit data Data terminal ready Data terminal set Request to send Signals from Alarm Active UIF module 16 pin connector 6 pin DIN connector Five volts Ground Optocouplers Shut down Isolation barrier 1500 volts ALARM ACTIVE Maximum baud rate 19 2K Figure S4 4 Communications Sub module Block Diagram Selecting RS232 serial signaling is accomplished by moving switches S1 S3 S5 S7 on SW1 and SW2 to the on position and switches S2 S4 S6 S8 to the OFF position This enables U9 and disables U 10 With RS232 selected J 1 has the following pinout DTR DSR TXD GND OO P GO Nurse Call 3 3V S 19 Technical Supplement 4 2 7 Display Board S 20 Selecting RS422 serial signaling is accomplished by moving switches S 2 S4 S6 S8 on SW1 and SW2 to the on position and switches 1 S3 S5 S7 to the OFF position This enables U10 and disables U9 With RS422 selected J 1 has the following pinout TXD RXD TXD GND RXD Nurs
115. or s sensor input The analyzer leakage indication must not exceed 50 microamps for 240 volts 10 microamps for 120 volts for the following AC power configurations with the monitor on AC LINE POWER LINE POLARITY GROUND CABLE Normal Normal Normal Open 3 19 Section 3 Performance Verification 3 5 SPO2 TESTS The following tests can be used to verify analyze and troubleshoot the SpO2 circuitry of the N 3000 RCAL Circuit Test LED Drive Tests The tests require use of the SRC 2 tester and the service mode as detailed in paragraph 4 3 3 5 1 RCAL Circuit Test 3 5 2 LED Drive Tests 3 20 L Connect an SRC 2 pulse oximeter tester to the sensor input cable and connect the cable to the monitor Set the SRC 2 as follows SWITCH POSITION RATE 112 LIGHT LOW MODULATION OFF MODE LOC RCAL 63 Enter the service mode steady state as instructed in paragraph 4 3 Select menu item 30 by rotating the knob until 30 appears in the SpO 2 display Press the UPPER ALARM LIMIT button The RCAL value 63 is displayed in the HEART PULSE RATE display Set the SRC 2 RCAL Mode switch to REM RCAL 64 The RCAL value 64 is displayed in the HEART PULSE RATE display Press the LOWER ALARM LIMIT button toreturn to the service mode steady state Connect an SRC 2 pulse oximeter tester to the sensor input cable and connect the cable to the monitor Set the SRC 2 as follows SWITCH POSITION RATE 112 LIG
116. ore turning knob Alarm Silence Duration ALARM SILENCE button press and 4 2 7 hold turn knob within 3 seconds Configuration Menu UPPER LOWER ALARM LIMIT 4 2 8 buttons simultaneously Note To change neonate default limits enter the neonatal mode from configuration mode steady state by pressing the NEW PATIENT NEONATAL button twice within 2 seconds Change the desired limit using the same method as adult default limits When an SpO2 or heart pulse rate default limit has been changed a decimal point will appear after the displayed limit until the configuration mode is exited 4 2 1 Adult Neonatal Mode Default The mode adult or neonatal that the monitor is in when exiting the configuration mode becomes the power on default To change from a power on default of adult mode to a power on default of neonatal mode enter the configuration mode steady state Press the NEW PATIENT NEONATAL button twice within 2 seconds and then power down by pressing the ON STANDBY button 4 2 2 Default SpO2 Upper Alarm Limit 42 1 From the configuration mode steady state press and release the UPPER ALARM LIMIT button The current default value is displayed in the SpO 2 display Dashes appear in the HEART PULSE RATE display the upper horizontal segments of the display indicating that the monitor is in the set SpO 2 upper alarm limit mode 2 3 Section 4 Configuration Mode Service Mode and Alarm Active Function To chang
117. osas Cedex France Tel 33 1 34 63 06 00 Nellcor Puritan Bennett Germany GmbH Black amp Decker Strasse 28 65510 Idstein Germany Tel 49 6126 5930 Nellcor Puritan Bennett Italia Srl Via dei Tulipani 3 20090 Pieve Emanuele M1 Italy Tel 39 2 90786404 To obtain information about a warranty if any for this product contact Nellcor Puritan Bennett Technical Services or your local Nellcor Puritan Bennett representative Nelicor Puritan Bennett Durasensor Nellcor Symphony Oxisensor II and the Nellcor Puritan Bennett knob configuration are trademarks of Nellcor Puritan Bennett Incorporated 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 and 5 368 026 TABLE OF CONTENTS List of Figures List of Tables Section 1 Introduction 0 0 0 0 ccc cccc cece cece ee cee eeennaecesecscueaecesescseas suseeeeeseaaes 1 1 1 1 Manual OVErVICW ccccccccccccccccceecee cecseeeececeeseseeeeeeeeseaeaeee ceeeeeees 1 1 1 2 Warnings Cautions and Notes c ccccscceecsseeee caneeeeeseeeeeeaes 1 1 1 2 1 Ville BE 1 1 1 2 2 een EE 1 1 1 2 3 le 1 1 1 3 N 3000 Patient Monitor Description eee ee eeeeee eener 1 1 1 4 Related Documents scecccececeeaee seseeeeeeeeeseanseeseeseeeseeaaaeeess 1 2 Section 2 Routine Maintenance cecceceeeceseesssaeceeeeeeesees 2 1 21 CICANING TEE 2 1 2 2 Per
118. ot sound 58 Recommended Action If the sensor is connected replace the sensor connector assembly If the condition persists replace the sensor extension cable If the condition does not change replace the SpO2 PCB If the condition still persists replace the ECG PCB If the condition still persists replace the UIF PCB Verify the problem with the service mode menu item 2 knob and lamp test Check the connection between the UIF PCB and the Display PCB If the condition does not change replace the Display PCB If the condition still persists replace the UIF PCB Replace the cable with a known serviceable cable Ensure there is a good connection between the ECG PCB and UIF PCB If the condition still persists replace the ECG PCB Moisture or spilled liquids can cause an alarm to sound Allow the monitor to dry thoroughly before using If the condition persists replace the UIF PCB Verify the problem with the service mode menu item 4 speaker test Replace the speaker as described in Section 6 Disassembly Guide If the condition persists replace the UIF PCB Section 5 Troubleshooting 5 6 5 Operational Performance Table 5 6 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 Gui
119. paragraph 3 3 1 Battery Operation Test 3 3 3 Power up Tests Section 3 Performance Verification The power up tests 3 3 3 1 through 3 3 3 3 verify the following monitor functions 3 3 3 1 Power On Self Test 1 3 3 3 1 Power On Self Test 3 3 3 2 Adult Power On Defaults and Alarm Limit Ranges 3 3 3 3 Neonate Power On Defaults and Alarm Limit Ranges Connect the monitor to an AC power source using the external power supply and verify that the BATTERY CHARGING indicator is lit Do not connect any sensor or ECG cables to the monitor Observe the monitor front panel With the monitor off press the ON STANDBY button To successfully complete the self test the monitor must perform the following sequence a b The monitor emits three consecutively higher pitched beeps All indicators light for a few seconds as illustrated in Figure 3 1 Verify that the Sp02 left most display HEART PULSE RATE middle and AUXILIARY right displays all indicate 8 8 8 NELLCOR Symphony N 3000 Figure 3 1 Self Test Display All displays turn off momentarily Digital displays individually light in a scanning or firefly test pattern while the test is taking place A single 1 second beep is produced and all displays again illuminate momentarily indicating that the automatic power on self test is complete The beep may sound before all the displays have lit in the
120. play indicating that the monitor is in the set pulse rate upper alarm limit mode To change the upper alarm limit default value rotate the knob on top of the monitor You cannot decrease the value lower than the current pulse rate lower alarm limit default setting The pulse rate default upper alarm limit cannot be set higher than 250 Return to configuration mode steady state 4 2 5 Default Heart Pulse Rate Lower Alarm Limit 1 From the configuration mode steady state press the LOWER ALARM LIMIT button twice within 3 seconds The current default value is displayed in the HEART PULSE RATE display To change the lower alarm limit value rotate the knob CW to increase or CCW to decrease Y ou cannot increase the value higher than the current pulse rate upper limit setting The pulse rate lower alarm limit cannot be set lower than 30 Return to configuration mode steady state 43 Section 4 Configuration Mode Service Mode and Alarm Active Function 4 2 6 Default Alarm Volume Perform the following steps to adjust the default alarm volume 1 From the configuration mode steady state press and hold the AUDIBLE ALARM OFF button After 3 seconds a continuous tone at the current volume setting is emitted VOL is displayed in the HEART PULSE RATE display and the current default alarm setting a number from 1 to 10 is displayed in the SpO2 display While continuing to hold the AUDIBLE ALARM OFF button turn th
121. r ceeeeeeeceeeesaeeesaeeeaesenee nanna S 15 J3 Knob CEDIES dich erbiaren oaa eataa e Aaaa aa e eA eraai S 15 vii SECTION 1 INTRODUCTION 1 1 1 2 1 2 1 1 2 2 1 2 3 1 3 Manual Overview Warnings Cautions and Notes N 3000 Patient Monitor Description Related Documents ROD 1 1 1 1 MANUAL OVERVIEW This manual contains information for servicing the Neal cor Symphony model N 3000 patient monitor Only qualified service personnel should service this product Before servicing the N 3000 read the operator s manual carefully for a thorough understanding of operation WARNINGS CAUTIONS AND NOTES Warning Caution Note This manual uses three terms that are important for proper operation of the monitor Warning Caution and Note A warning precedes an action that may result in injury or death to the patient or user Warnings are boxed and highlighted in boldface type A caution precedes an action that may result in damage to or malfunction of the monitor Cautions are highlighted in boldface type A note gives information that requires special attention N 3000 PATIENT MONITOR DESCRIPTION The purpose and function of the Ndlcor Symphony N 3000 patient monitor is to noninvasively and continuously monitor functional arterial oxygen saturation ECG pulse rate and heart rate for adult pediatric and neonatal patients in all hospital areas and hospital type facilities It may be used for
122. r 1 4 inch socket 7 16 inch socket 7 16 inch torque wrench 10 inch pounds 1 13 newton meters required only when replacing knob WARNING Before attempting to open or disassemble the N 3000 disconnect the power cord from the N 3000 Caution Observe E SD electrostatic discharge precautions when working within the unit Caution Remove the battery before disassembling the unit Noe Some spare parts havea business reply card attached When you receive these spare parts please fill out and return the card 61 Section 6 Disassembly Guide 6 2 6 2 REMOVING THE BATTERY Caution If it is necessary to apply AC power while the battery cover is removed do not connect the SPS power supply to the monitor while the power supply is plugged into AC power Instead first connect the power supply to the monitor then connect the power supply to AC power Misalignment of the power supply cord connector with the lower docking connector may result in damage to the monitor This caution does not apply when the battery cover is attached to the N 3000 Perform the following steps to replace the battery i 2 3 Turn the N 3000 OF F by pressing the ON STANDBY button Disconnect the monitor from the SPS power supply Set the N 3000 upside down facing you as shown in Figure 6 1 Battery cover ek E el Squeeze Battery cover C fasteners Figure 6 1 Battery Replacement Loosen the two battery cover
123. re the CSBOOT signal is generated depends upon the U1 clock speed and the speed at which U4 can successfully perform its functions With the N 3000 the number of wait states must be set to 1 based upon a CPU clock speed of 16 0 MHz maximum and the U4 access time of 150ns maximum Resistor R22 pulls the U4 OE signal state to low during normal operation If this signal state is high the U4 output is disabled C RAM Memory The U5 RAM chip provides the SpO2 Controller board with 128K bytes of memory The U1 CS0 provides the chip enable signal for U3 The U3 hardware has an 8 bit wide data path After boot up CSO is configured as a chip select with a start address of 40000h block length of 128K 8 bit port both bytes access both read and write access and gated with AS This configuration gives a data memory range of 40000 through 5FFFFh The number of wait states to generate depends upon the U1 clock speed and the U3 access speed The number of wait states for CSO is set to 0 based ona U3 access time of 85ns minimum d Stackbus The SpO2 controller board also communicates with other boards within the N 3000 via the stackbus The stackbus is controlled by the COM 20020 Arcnet controller chip U6 which is enabled by U1 CS1 CS1 must be configured as a chip select with a start address of 60000h block length of 2k 8 bit port both bytes access both read and write access and gated with AS This configuration maps the stackbus i
124. remain shorted to ground as long as the alarm is sounding 1 2 3 4 5 6 Figure 4 1 Serial Port Pin Locations If voltage levels of 7 volts on pin 1 are desired for remote alarm monitoring while in RS 232 mode short together the DSR pin 2 and TXD pin 3 lines of the communication cable Once the alarm active function has been enabled during power on an alarm will toggle the DTR line pin 1 from a logic LOW of 7 volts toa HIGH of 7 volts As long as the alarm is sounding this line will remain HIGH When the alarm is silenced or becomes inactive the line will return to its LOW logic level If a continuous 3 3 volt signal on pin 6 is desired as when using the Nell cor Puritan Bennet SOC 3 adapter change the dip switch settings on the Communications PCB as instructed in paragraph 6 5 1 4 29 SECTION 5 TROUBLESHOOTING 5 1 5 2 5 3 5 4 5 5 5 1 Introduction 5 2 Howto Use this Section 5 3 Who Should Perform Repairs 5 4 Replacement Level Supported 5 5 Obtaining Replacement Parts 5 6 Troubleshooting Guide INTRODUCTION This section explains how to troubleshoot the N 3000 if problems arise Tables are supplied that list possible monitor difficulties along with probable causes and recommended actions to correct the difficulty HOW TO USE THIS SECTION Use this section in conjunction with Section 3 Performance Verification and Section 7 Spare Parts To remove and replace a part you suspect is defective
125. represent the outputs of the IR and red sensor channels after the amplifier offset values have been applied 1 Connect the sensor to the N 3000 2 Verify that the SpO2 module is set for automatic operation using menu item 39 paragraph 4 3 27 3 Press the LOWER ALARM LIMIT button to return to the service mode steady state 4 From the service mode steady state select menu item 32 by rotating the knob until 32 appears in the Sp02 display Press the UPPER ALARM LIMIT button The SpO2 corrected IR output signal is displayed in the SpO 2 display in hundredths of volts The SpO 2 corrected red output signal is displayed in the HEART PULSE RATE display in hundredths of volts 5 Press the LOWER ALARM LIMIT button to return to the service mode steady state Section 4 Configuration Mode Service Mode and Alarm Active Function 4 3 21 Menu Item 33 SpO2 IR LED Drive Test This function allows you to validate sensors and or the operation of the SpO2 module 1 2 Connect the sensor to the N 3000 Verify that the SpO2 module is set for automatic operation using menu item 39 paragraph 4 3 27 Press the LOWER ALARM LIMIT button toreturn to the service mode steady state From the service mode steady state select menu item 33 by rotating the knob until 33 appears in the Sp02 display Press the UPPER ALARM LIMIT button The SpO2 IR drive value between 0 255 is displayed in the HEART PULSE RATE display To
126. retaining fasteners securing the battery compartment cover Gently squeeze the battery cover sides in the middle as you swing the cover open it is hinged on the right with three tabs that extend into slots on the chassis 7 Section 6 Disassembly Guide Lift the battery out of the battery bracket as shown in Figure 6 2 It may be necessary to use the edge of a flat tip screwdriver to gently pry the battery loose Battery cover Battery Power connector Battery bracket Figure 6 2 Removing the Battery Disconnect the power connector from the battery 6 3 BATTERY REPLACEMENT L 2 3 4 5 6 Complete the procedure in paragraph 6 2 The lead acid battery is recyclable Do not dispose of battery by placing it in the regular trash Dispose of properly or return to Nellcor Puritan Bennett Technical Services for disposal Connect the power connector to the new battery Position the battery into the battery bracket Replace the battery cover and tighten the retaining fasteners Turn the monitor on and verify proper operation Note Ifthe replacement battery is low on charge the BATTERY CHARGING indicator may not light if the monitor is off and connected to AC power If that is the case turn the N 3000 on to begin charging 63 Section 6 Disassembly Guide 6 4 FUSE REPLACEMENT 1 Complete the procedure in paragraph 6 2 2 Replace the fuses as shown in Figure 6 3 with an eq
127. ries do not operate when may be discharged To recharge the disconnected from AC batteries keep the N 3200 connected to AC power power Confirm that the BATTERY CHARGING indicator lights The monitors may be used with a less than fully charged battery but with a corresponding decrease in operating time from that charge If the battery fails to hold a charge replace as indicated in the Disassembly Guide section While operating on Ensure that a good docking connection battery power the exists between the N 3000 and N 3100 GE Se mith If the condition persists recharge the battery The battery may have enough SERA TER COW power left to operate the N 3000 but not the N 3100 indicator lighting steadily but N 3100 does not operate 511 Section 5 Troubleshooting 5 6 7 Serial Port Table 5 8 lists symptoms of problems relating to the serial port and recommended actions If the action requires replacement of a PCB or module refer to Section 6 Disassembly Guide Table 5 8 Serial Port Problems Condition Recommended Action 1 The measured voltages 1 Ensure the Communications PCB switch at the serial port settings are as described in paragraph 6 8 paragraph 3 3 5 4 are incorre If the condition persists replace the Communications PCB If the condition still persists replace the UIF PCB The measured voltages Perform the serial port loop back menu at the serial port item 61 and seri
128. rnally corrected error codes are not normally displayed These errors are logged on the internal Error Log then the N 3000 watchdog circuitry resets the monitor They can be accessed only by using the Service Mode menu items 7 through 16 as indicated in Paragraph 4 3 Service Mode Table A 4 lists the internally corrected error codes in numerical order It is not normally necessary for service personnel to access the Error Log However if you find it necessary to contact Nellcor Puritan Bennett Technical Services or your local Nellcor Puritan Bennett representative they may request information from the Error Log Table A 4 N 3000 Internally Corrected Error Codes Explanation General failure of UIF Generic POST UIF cannot allocate a resource ran out of a dynamic resource memory corruption during initialization or a logic error resulting from a low probability combination of events that did not appear in unit or validation testing A 3 Appendix Table A 4 N 3000 Internally Corrected Error Codes Continued Explanation 126 UIF stack overflow 150 UIF general watchdog reset 153 UIF unexpected interrupt 154 UIF RTXC executive function failed i ae E Ei 225 SpO 2 can t allocate a resource 226 SpO 2 stack overflow 250 SpO 2 general watchdog reset 2 SpO 2 memory corruption 3 SpO 2 unexpected interrupt 4 SpO 2 RTXC executive function failed SpO 2 communication bus common code failed SpO 2 cannot
129. ro controller memory system internal stackbus interface and other control logic The SpO2 PCB contains all the analog signal conditioning and control hardware necessary to measure SpO2 The two boards are electrically connected by a single interface connector Also connected to the UIF module is the ECG module There are two PCBs that comprise the ECG module the ECG PCB and the ECG controller The ECG leads from the patient are connected to this PCB where the analog ECG signals are conditioned for further processing by the ECG Controller PCB Patient connections and initial conditioning circuits are electrically isolated from the N 3000 on this PCB The ECG Controller PCB contains a microprocessor and supporting circuits used to supply ECG data to the UIF PCB The Communications module allows messages to be sent to a host computer using asynchronous serial communications All communications signals on the Communications module originate from the UIF module The Display module contains annunciators and push buttons allowing the user to access information and to select various available parameters The Display PCB contains SpO2 and heart rate LEDs and their associated driver circuits Front panel switches also allow the user to turn the unit on and off to set alarm limits and to print data The Display PCB is connected tothe UIF module via a 14 pin connector S 3 Technical Supplement External Power Supply Docking UIF Communi
130. ry items in original packaging Figure 8 1 Repacking the N 3000 2 Placein shipping carton and seal carton with packaging tape EN Section 8 Packing for Shipment 8 3 EE 3 Label carton with shipping address return address and RGA number if applicable REPACKING IN A DIFFERENT CARTON If the original carton is not available 1 2 Place the monitor in a plastic bag Locate a corrugated cardboard shipping carton with at least 200 pounds per square inch psi bursting strength Fill the bottom of the carton with at least 2 inches of packing material Place the bagged unit on the layer of packing material and fill the box completely with packing material Seal the carton with packing tape Label the carton with the shipping address return address and RGA number if applicable SECTION 9 SPECIFICATIONS 9 1 9 2 GENERAL ELECTRICAL 9 1 General 9 2 Electrical 9 3 Physical Characteristics 9 4 Environmental 9 5 Alarms 9 6 Factory Default Settings 9 7 Performance Designed to meet safety requirements of UL 544 UL 2601 1 CSA C22 2 No 601 1 M 90 IEC 601 1 type CF ISO 9919 RFE per VFG 243 EMC per IEC 801 series Protection Class Class per I E C 601 1 clause 2 2 4 Degree of Protection Type CF per I E C 601 1 clause 2 2 26 Defibrillation protected on ECG input port but not SpO2 input port Battery Type Operating time Recharge period Input Voltage
131. s SECTION 7 SPARE PARTS 7 1 Introduction 7 1 INTRODUCTION Spare parts along with part numbers are shown below Item numbers in parentheses correspond to the callout numbers in Figure 7 1 1 031763 2 640115 3 030487 031646 5 030783 030067 7 032994 033115 SP033446 11 640112 642002 SP033217 14 SP031802 024897 16 SP033057 033313 033311 030730 030524 030711 22 024138 23 291169 033120 033121 26 SP033442 1 27 SP030097 030065 29 SP030063 34 031517 031853 36 030581 030974 023301 032974 SP030221 JL Ee ER ES 5 GE ES 8 ER Jl H 16 ES L 26 Se ER 34 36 40 Section 7 Spare Parts Item No Description sd PartNo not pictur not pictur not pictur not pictur gt WN U LA not pictur not pictur ed ed ed ed not pictured ed ed ed Q 7 2 Section 7 Spare Parts Figure 7 1 shows the N 3000 expanded view with numbered callouts relating to the spare parts list Rear panel 28 Battery cover 1 New patient neonatal 38 NR Lead acid battery 2 Battery bracket 3 Bottom cover 4 Carrying handle 5 Docking connector PCB 40 SpO2 PCB 29 Left panel 6 Speaker gasket 7 Speaker with lead 8 SpO2 controller PCB 27 Communications PCB 9 UIF PCB 26 Lithium battery small 11 Docking connector Lithium battery large 12 cable 36 ECG PCB
132. s a heart rate of 240 5 bpm 3 3 5 4 Leads Off Detection Test 3 12 The following test sequence will verify proper operation of the leads off detection circuitry 1 Select the following settings on the ECG tester PARAMETER SETTING HEART RATE 60 bpm AMPLITUDE 1 millivolt LEAD SELECT lI SINUS RHYTHM Normal Verify the following monitor reaction a b d The heart rate beep decreases in frequency The HEART PULSE RATE display decreases in value and stops flashing indicating that the heart rate is now within alarm limit settings The Sp02 and AUXILIARY displays remain blank The PULSE AMPLITUDE indicator is not lit The monitor displays a heart rate of 60 5 bpm Disconnect the LL lead from the ECG simulator Verify the following monitor reaction a The HEART PULSE RATE display contains dashes and the LEADS OFF indicator lights The Sp02 and AUXILIARY displays remain blank The PULSE AMPLITUDE indicator is not lit A low priority audible alarm sounds Section 3 Performance Verification 5 3 3 6 Normal Operation Reconnect the LL lead to the ECG simulator Verify the following monitor reaction a TheHEART PULSE RATE display initially displays zero and the LEADS OFF indicator is no longer lit b TheSpO2 and AUXILIARY displays remain blank The PULSE AMPLITUDE indicator is not lit c Heart rate beeps resume d After at least five heartbeats the monitor displays a
133. s lit ensure that the power supply is properly plugged into the N 3100 Check the N 3000 fuse and replace if necessary Ensure that the N 3200 power cord is plugged into an operational AC outlet and the N 3200 AC receptacle Ensure that the AC power switch on the rear panel of the N 3200 is ON Check the N 3200 fuse and replace if necessary If the condition persists replace the N 3200 power supply as instructed in the N 3200 service manual Ensurethat a good docking connection exists between the N 3000 and N 3100 N 3200 Check the N 3000 fuse and replace it if necessary as indicated in the Disassembly Guide section Check the N 3100 and N 3200 fuses and replace if necessary as indicated in the Disassembly Guide section of the N 3100 or N 3200 service manual Section 5 Troubleshooting Table 5 7 Stack Problems Continued 5 The N 3000 and N 3100 The N 3000 battery may be discharged To do not operate when recharge the battery keep the N 3000 disconnected from the connected to its external power supply external power supply Confirm that the BATTERY CHARGING indicator lights The monitors may be used with a less than fully charged battery but with a corresponding decrease in operating time from that charge If the battery fails to hold a charge replace as indicated in the Disassembly Guide section 6 The N 3000 and N 3200 The N 3000 battery and N 3200 batte
134. s section discusses use of the configuration mode to reconfigure power on default values the service mode to identify and correct monitor difficulties and the alarm active function 4 2 CONFIGURATION MODE The following paragraphs describe how to enter the N 3000 configuration mode and change factory power on default settings The N 3000 cannot enter the configuration mode while it is stacked unless the other instruments are in the configuration mode or are turned off If the other instruments are in the configuration mode the N 3000 knob may be used to scroll to the desired menu item and adjust the settings of the other instruments Likewise if the N 3000 is stacked with an N 3200 and both are in the configuration mode the N 3200 knob may be used to scroll to the desired menu item and adjust the settings of the N 3000 Use the following procedure to enter configuration mode 1 Ifthe monitor is on turn it off 2 While simultaneously pressing both UPPER and LOWER ALARM LIMIT buttons turn the monitor on Continue to press both buttons until CFG begins flashing in the AUXILIARY display 3 Releasethe UPPER and LOWER ALARM LIMIT buttons 4 Press the PRINT button CFG stops flashing and remains displayed in the AUXILIARY display If the PRINT button is not pressed within 15 seconds after CFG begins flashing the monitor will turn off automatically You are now in configuration mode steady state The N 3000 aut
135. s silenced The HEART PULSE RATE display indicates 60 and the AUXILIARY display indicates SEC while the AUDIBLE ALARM OFF button is pressed Release the AUDIBLE ALARM OFF button Verify the following a Thealarm remains silenced b TheAUDIBLE ALARM OFF indicator lights CG TheSp02 and HEART PULSE RATE displays resume flashing d Thepulsetoneis still audible e Theaudio alarm returns approximately 60 seconds after the AUDIBLE ALARM OFF button is released Press and hold the AUDIBLE ALARM OFF button Rotate the control knob CCW until the HEART PULSE RATE display indicates 30 SEC Rotate the control knob clockwise CW and verify that the displays indicate 60 SEC 90 SEC 120 SEC and OFF Release the button when the display indicates OFF Verify that the AUDIBLE ALARM OFF indicator flashes Wait approximately 3 minutes Verify that the alarm does not return After 3 minutes the alarm silence reminder beeps three times and will continue to do so at 3 minute intervals 37 Section 3 Performance Verification 3 3 4 3 Alarm Volume Control After completing the procedurein paragraph 3 3 4 2 L 3 Press and hold the AUDIBLE ALARM OFF button on the top of the monitor Verify the following a OFF is displayed for approximately 3 seconds b After 3 seconds a steady tone is heard at the default alarm volume setting the HEART PULSE RATE display indicates VOL and the AUXILIARY display
136. s test verifies the integrity of the power cord ground wire from the AC plug and connection with the SPS external power supply chassis ground 1 Configure the electrical safety analyzer as follows Function Ground resistance test Range mA Connect the monitor s AC plug to the analyzer as recommended by the analyzer operating instructions Connect the analyzer resistance input lead to the grounding lug on the rear panel of the external power supply Verify that the analyzer indicates 150 milliohms or less The following tests verify the electrical leakage of the monitor Chassis Source Current Patient Source Current Patient Sink Current 3 4 2 1 Chassis Source Current 3 18 This test is in compliance with IEC 601 1 and AAMI Standard ES1 paragraph 3 3 1 Chassis Source Current between the power ground and part b exposed conductive hardware L Configure the electrical safety analyzer as follows Function Leakage Range uA Connect the monitor AC plug to the electrical safety analyzer as recommended by the analyzer operating instructions Connect the electrical safety analyzer leakage input lead to the monitor e SPS external power supply grounding lug The analyzer leakage indication must not exceed 100 microamps at 100 120 VAC or 500 microamps at 220 240 VAC for the following AC power configurations while the monitor is turned on and while turned off AC LINE POWER LINE POLARITY GROUND CABLE
137. scanning sequence The POWER ON indicator is lit The BATTERY CHARGING indicator is also illuminated The SpO 2 HEART PULSE RATE and AUXILIARY displays are blank If an SpO2 sensor or ECG leads and a cable were connected 0 would be displayed in both the SpO 2 and HEART PULSE RATE displays This is referred to as the normal mode steady state Press and hold the NEW PATIENT NEONATAL button located on the rear panel for 3 seconds until you hear three beeps indicating that stored patient data is cleared 33 Section 3 Performance Verification 3 3 3 2 Adult Power On Defaults and Alarm Limit Ranges 34 Noe This paragraph and paragraph 3 3 3 3 are written using Nellcor Puritan Bennett factory set defaults If your institution has preconfigured custom defaults those values will be displayed Factory defaults can be reset using the service mode procedure described in paragraph 4 3 11 Menu Item 20 Reset to Factory Defaults or the configuration mode procedure described in paragraph 4 2 8 6 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 steady state Ensure that the monitor is on Press and release the UPPER ALARM LIMIT button Verify that the monitor emits a single beep and the SpO 2 display indicates an alarm limit of 100 for 3 seconds Verify that the other displays indicate a sing
138. schematics are included in this section Figure Figure S5 1 Figure S5 2 Figure S5 3 Figure S5 4 Figure S5 5 Figure S5 6 Figure S5 7 Figure S5 8 Figure S5 9 Figure S5 10 Figure S5 11 Figure S5 12 Figure S5 13 Figure S5 14 Figure S5 15 Description SpO2 PCB Part Locator Diagram ECG PCB Part Locator Diagram UIF PCB Part Locator Diagram SpO 2 Controller PCB Part Locator Diagram ECG Controller PCB Part Locator Diagram Communications PCB Part Locator Diagram Display PCB Part Locator Diagram SpO 2 Schematic Diagram ECG Schematic Diagram UIF Schematic Diagram SpO 2 Controller Schematic Diagram ECG Controller Schematic Diagram Communications Schematic Diagram Display Schematic Diagram Lower Docking Connector Schematic Diagram S 21
139. se of either a 256K x 16 or 128K x 16 PROM at U10 Pin 43 of U10 is connected toJ 10 Pin 2 On a 256K x 16 PROM Pin 43 will be PROM address A17 On a 128K x 16 PROM Pin 43 will be an active high output enable Address line A18 from U3 is connecteded toJ 10 pin 1 and VDD is connected to J 10 pin 3 Attaching a jumper between J 10 pins 1 and 2 will connect U3 address line A18 to PROM address A17 to address all 256K words ina 256K x 16 PROM Connecting a jumper between J 10 Pins 2 and 3 will connect Pin 43 to VDD for the active hi output enable of a 128K x 16 PROM The PROM chip select is connected to the CSBOOT signal Pin 112 of U3 At system reset this signal defaults to decode address 00000 for a block of 1 megabyte held active for 13 wait states and gated with the processor address strobe The output enable of the PROM pin 22 is connected to ground through R8 to allow data to be gated onto the data bus as soon as the CSBOOT signal goes active After a system reset CSBOOT is configured to have one wait state and to be active only for the address range of the PROM Processor RAM U13 and U23 The RAMs are used by the processor to store program variables values and trend data Each is 128K x 8 arranged to provide 128K x 16 bits of RAM for use by the processor U3 address lines A17 through A1 are connected to both RAMs address lines A16 through AO U3 data bus lines D15 through D8 are connected to U 13 data bus lines D7 through DO for
140. service mode steady state 4 3 29 Menu Item 41 Set ECG Pacer Filter 424 This function allows you to turn the pacer filter ON or OFF Pacer filter ON causes the N 3000 to filter pacemaker generated signals so that they will not be measured in determining a patient s heart rate When the filter is ON pacemaker signals of 1 to 2 0 milliseconds in duration with 2 0 to 700 0 millivolt amplitude are filtered out The power on default setting is not changed Section 4 Configuration Mode Service Mode and Alarm Active Function 1 From the service mode steady state select menu item 40 by rotating the knob until 40 appears in the Sp02 display Press the UPPER ALARM LIMIT button 2 ON or OFF is displayed in the HEART PULSE RATE display To change the current setting rotate the knob until the desired setting is displayed 3 Press the LOWER ALARM LIMIT button to return to the service mode steady state 4 3 30 Menu Item 42 Set ECG Low Frequency Filter This function allows you to change the ECG low frequency filter for service mode testing Selecting ON enables a 05 Hz ECG channel high pass filter providing better ST segment resolution When OFF is selected a 0 5 Hz filter is used The power on default setting is not changed 1 From the service mode steady state select menu item 42 by rotating the knob until 42 appears in the Sp02 display Press the UPPER ALARM LIMIT butto
141. signal is applied through two switches in U14 to the RAW_ECG signal input to U19 The output of U19 is applied to variable offset amplifier U13 When the GAIN1 signal from the ECG Controller is high the gain of the servo amplifier and U19 is 4 33 dB When the GAIN1 signal is low the gain of U 13 is 13 GB An ECG offset voltage on the ECG_OFFSET line from U 28 The value of this offset voltage is set in U28 by the ECG Controller ECG OFFSET is applied through amplifier U10 as the reference for U13 The output of U13 is then applied to variable gain amplifier part of U23 When the GAIN2 signal for the ECG Controller is high the gain of this amplifier is 7 87 dB and when GAIN2 is high the gain is 15 73 dB controlled by the switch part of U 14 The output of this amplifier is ECG OUT which is applied to the ECG Controller as the ANALOGO signal The output of U13 is also applied to another amplifier circuit with the same variable gain composed of two amplifiers part of U13 and part of U23 The gain of this amplifier circuit is also controlled by the switch part of U18 by the GAIN2 signal from the ECG Controller The output of this second variable gain amplifier is CARD OUT which is applied to the ECG Controller as the ANALOGI1 signal g Pacemaker Detection and Suppression Circuit The RAW_EGG signal from the servo amp circuit is AC coupled tothe pacemaker detection and suppression circuit composed of three amplifiers from U 10 and inverter buffer
142. sor to the N 3000 2 Verify that the SpO2 module is set for automatic operation using menu item 39 paragraph 4 3 27 3 Press the LOWER ALARM LIMIT button to return to the service mode steady state 4 From the service mode steady state select menu item 36 by rotating the knob until 36 appears in the Sp02 display Press the UPPER ALARM LIMIT button 5 The SpO2 preamp gain from 0 to 3 is displayed in the HEART PULSE RATE display 6 Toadjust the gain value rotate the knob The HEART PULSE RATE display will flash Pressing the UPPER ALARM LIMIT button will set the displayed value in the SpO2 module which will cease its automatic operation The HEART PULSE RATE display will stop flashing Section 4 Configuration Mode Service Mode and Alarm Active Function Press and hold the PRINT button to display the SpO2 corrected IR and red output signals as described in menu item 32 Release the PRINT button Press the LOWER ALARM LIMIT button to return to the service mode steady state 4 3 25 Menu Item 37 Set SpO2 Analog Test Mode This function allows you to validate sensors and or the operation of the SpO02 module L Connect the sensor to the N 3000 2 From the service mode steady state select menu item 37 by rotating the knob until 37 appears in the Sp02 display Press the UPPER ALARM LIMIT button 3 Thetest mode setting of 0 normal operation is displayed in the HEART PULSE RATE display SEr is d
143. steady state select menu item 3 by rotating the knob until 3 appears in the Sp02 display Press the UPPER ALARM LIMIT button A 0 appears in the HEART PULSE RATE display Press each of the buttons and button combinations listed below The corresponding number appears in the HEART PULSE RATE display to indicate that these buttons and button combinations are functioning correctly Displayed Press the following button and or button combinations number None pressed 0 Audible alarm off 1 New patient neonatal rear panel 2 Upper alarm limit 3 Lower alarm limit 4 Print 5 Upper and lower alarm limits simultaneously 6 Upper lower limits and print simultaneously 7 Upper limit and audible alarm off simultaneously 8 Lower limit and audible alarm off simultaneously 9 Any combination not listed above 10 413 Section 4 Configuration Mode Service Mode and Alarm Active Function 3 Rotate the knob CW or CCW toreturn to the service mode steady state 4 3 4 Menu Item 4 Speaker Test This test verifies that the volume control is functional and determines whether or not there are any discontinuities or saturation conditions in the audible output 1 From the service mode steady state select menu item 4 by rotating the knob until 4 appears in the Sp02 display Press the UPPER ALARM LIMIT button A 1 appears in the HEART PULSE RATE display anda low level audible tone heard 2 Rotate the control knob CW As the n
144. supply voltages are electrically isolated from the N 3000 chassis and are referenced to a separate isolated ground at the COM output of U9 The voltages are used to power the conditioning circuits for the ECG lead signals Surge arrestor DT1 provides a high voltage safety discharge path between the isolated ground and chassis ground b Cable Off Detector Circuit When the external ECG lead cable assembly is connected to the N 3000 pin 1 of connector P1 is connected to the isolated ground This keeps the phototransistor part of U7 shown at the top right of schematic sheet 1 turned off If the ECG lead cable assembly is disconnected resistor R37 causes the phototransistor to conduct and NO_CABLE lineis pulled low to provide the ECG Controller with an indication that the ECG lead cable assembly is disconnected ECG Level Shift and Filtering The ECG lead inputs are connected to the ECG PCB through external connector P1 Resistors R44 R45 R46 R47 R48 and R122 form a voltage divider to put DC voltage offsets on the left and right arm and left leg signals These signals are then filtered and level limited before being applied to three unity gain amplifiers parts of U1 The outputs of the unity gain amplifiers are passed through solid state switch U2 The S0 and S1 lines which are the isolated SELO and SEL1 lines from the ECG Controller control the lead signals that are applied from the U2 DA and DB outputs to differential amplifier U4
145. t side panel Alarm speaker Speaker gasket Piezo power loss alarm speaker Connector J2 Figure 6 6 Handle Left Side Panel and Speaker Disassembly 3 Remove the left side panel this is on your right as illustrated above by pulling straight up be careful not to damage speakers 4 Removethe alarm speaker cable by lifting up from connector J 2 on the UIF PCB 6 7 REMOVING THE SPO2 PCB AND SPO2 CONTROLLER PCB 1 Complete the procedure in paragraph 6 5 6 6 Section 6 Disassembly Guide 2 Removethe rear panel rear panel insulator and NEW PATIENT NEONATAL button by lifting up and rotating out of the chassis channel guides as illustrated in Figure 6 7 Rear panel Rear panel insulator Sp02 PCB Sp02 controller PCB Pemm stud ECG PCB Figure 6 7 Rear Panel and SpO2 Module Disassembly 3 Remove the SpO2 PCB and the SpO2 Controller PCB by disconnecting them from the Pemm studs on the UIF PCB Pull up on the top board from the right side to disconnect from the Pemm studs 4 Toremove the SpO2 PCB from the SpO2 Controller PCB unsnap the SpO2 PCB from the Pemm studs on the SpO2 Controller PCB 68 REMOVING THE COMMUNICATIONS PCB 1 Complete the procedures in paragraph 6 6 and step 2 of paragraph 6 7 6 7 Section 6 Disassembly Guide 2 Using a 1 4 inch socket or needle nose pliers remove the Communications PCB by removing the four 1 4 inch nuts that secure it to the
146. teners securing the battery compartment cover 5 Gently squeeze the battery cover sides in the middle as you swing the cover open it is hinged on the right with three tabs that extend into slots on the chassis 6 Lift the battery out of the compartment as shown in Figure 3 7 It may be necessary to use the edge of a flat tip screwdriver to gently pry the battery loose 3 22 10 11 Section 3 Performance Verification Battery cover Battery Power connector Battery bracket Figure 3 7 Speaker Test Turn the monitor on by pressing the ON STANDBY button When the power on self test is complete disconnect the power connector from the battery Verify that a shrill beeping alarm is emitted from the speaker If no alarm sounds check the functionality of the lithium backup battery as indicated in paragraph 4 3 9 menu item 18 2 of the service mode The battery should measure approximately 3 volts If the battery is good replace the UIF PCB as indicated in paragraph 6 10 Reconnect the power connector to the battery The alarm is silenced and the monitor powers back on Turn the monitor off by pressing the ON STANDBY button Replace the battery in the battery bracket and reconnect the battery cover 3 23 SECTION 4 CONFIGURATION MODE SERVICE MODE AND ALARM ACTIVE FUNCTION 4 1 Introduction 4 2 Configuration Mode 4 3 Service Mode 4 4 Alarm Active Function 4 1 INTRODUCTION Thi
147. uivalent replacement Fuse F2 2 5 amp Fuse F1 1 amp 250V Slo Blow 250V Slo Blow Orao Battery Figure 6 3 N 3000 Fuses 3 Reinstall the battery and battery cover Caution The battery fuse F2 on the Docking Connector PCB must be removed before disconnecting the docking connector cable from connector J 13 as indicated in paragraph 6 5 Failure to remove the fuse may result in damage to the Lower Docking Connector PCB or UIF PCB 6 5 MONITOR DISASSEMBLY 1 Complete the procedure in paragraph 6 2 2 Remove the four corner screws that hold the monitor together Figure 6 4 Screws Screws cc Je cf J _ a Co e St Sa EE E El B Figure 6 4 N 3000 Corner Screws 64 Section 6 Disassembly Guide 3 Pull the carrying handle down to the right 4 Pull the unit apart swinging the bottom half to your left as illustrated in Figure 6 5 Communications PCB Bottom enclosure Figure 6 5 Opening the N 3000 Monitor Caution The battery fuse F2 on the Docking Connector PCB must be removed as indicated in paragraph 6 4 before disconnecting the docking connector cable from connector J 13 Failure to remove the fuse may result in damage to the Lower Docking Connector PCB or UIF PCB
148. umber in the HEART PULSE RATE display increases from 0 to 254 the volume will correspondingly increase 3 Rotate the control knob CCW to decrease the volume 4 Pressthe LOWER ALARM LIMIT button to return to the service mode steady state 4 3 5 Menu Item 5 Internal Configuration Code ICC Report 414 This menu item verifies whether the current monitor configuration is the desired configuration The ICC is the hexadecimal representation of the instrument hardware configuration derived by the UIF processor through internal examination of the modules and software present in the N 3000 1 From the service mode steady state select menu item 5 by rotating the knob until 5 appears in the SpO02 display Press the UPPER ALARM LIMIT button The ICC value appears as the two right most digits in the HEART PULSE RATE display The monitor s configuration is represented by one of the following values ICC Value Monitor Configuration 03 SpO2 only with serial port 07 SpO2 and ECG only with serial port OF SpO2 ECG and respiration with serial port 12 SpO2 only with wired network interface 16 SpO2 and ECG only with wired network interface 1E SpO2 ECG and respiration with wired network interface FF Invalid configuration If the displayed ICC value differs from the value stored in the EEPROM then the displayed value will flash 2 Ifthe displayed value is flashing press the UPPER ALARM LIMIT button to save the value as the
149. umber in the SpO 2 display to 1 2 The ECG software version number is the left most digit in the HEART PULSE RATE display The next two digits in the HEART PULSE RATE display represent the major software revision number The minor software revision number is displayed in the AUXILIARY display 4 Press the LOWER ALARM LIMIT button to return to the service mode steady state Section 4 Configuration Mode Service Mode and Alarm Active Function 4 3 2 Menu Item 2 Knob and Lamp Test This test verifies that indicators front panel lamps and the control knob are functional L From the service mode steady state select menu item 2 by rotating the knob until 2 appears in the Sp02 display Press the UPPER ALARM LIMIT button All indicators light Rotate the knob CW to light each display segment decimal indicator and blip bar in a firefly pattern to verify that each lamp works Note ThePOWER ON indicator is not tested with this procedure It can be verified by turning the monitor on and off The BATTERY CHARGING indicator is also not tested Rotate the knob CCW to reverse the firefly pattern Knob functionality is verified by the even movement through the firefly pattern as the knob is turned Press the LOWER ALARM LIMIT button toreturn to the service mode steady state 4 3 3 Menu Item 3 Button Test This test verifies proper operation of individual buttons and button combinations 1 From the service mode
150. unications board This board uses only the first 16 pins on the connector Table S4 2 J8 Connector UARTDSR RS232 422 only Pin No e Ee 9 Ground S Technical Supplement S 14 Table S4 2 J8 Connector Continued nput Output Power na Power Power Power Power DSL data strobe low ion Pin No ESO D10 J 12 J 22 These are two identical connectors that interface to the SpO2 module Power and stackbus signals are sent to these modules Additionally a connection between these two connectors allows the modules to communicate without stackbus if necessary Table S4 3 J12 J22 Inter Module Connector Pin Description Input Output Power Power Power ower ower nf na Power 7 10 11 12 ower 13 14 Technical Supplement J 5 Connector J 5 connects to the display board which allows the UIF module to control the monitor display Signals at this connector include power serial clock and data lines button signal and charging battery indicator current Table S4 4 J5 Display Connector Serialclock COC y y O LED drivers latch enable In 10 Power O Pin No e bama O OOOO Power e owsa O o C JS SC S D fBwonvoa oS Digital ground J 2 Connector J 2 connects the UIF board to the monitor speaker Table S4 5 J2 Speaker Connector Pin Description Input Output Power Differential speaker signal UO 2 Differential speaker signal
151. ut is coupled through capacitor C48 while the other output is used as a reference that is switched by U 24 onto R78 only during one channel on off cycle This AC couples only one channel Low frequency noise on the other channel is eliminated also since the LE D off output for both channels is the same This switched AC coupling removes the DC without resulting in channel crosstalk The resulting AC coupled signal and reference are switched through U25 to the input of differential amplifier U21 when the patient module is plugged in If the cable is plugged in U25 selects the output of the preamp and ground as the input to U21 AC coupling is performed to keep crosstalk from the preamped AC signal Differential amplifier U21 has a programmable gain of 1 4 16 or 64 depending upon the state of PDO and PD1 f Synchronous Demodulator and Gain If calibration is not selected the output of U21 is directed through U26 to filter U27 to eliminate high frequency noise Amplifier U28 is either an inverting or noninverting amplifier depending on the state of switch U 26 U3 samples the output to demodulate the two channels This sample and hold is then amplified by U5 or U6 The gain is 1 or 16 depending upon the state of DM2 from the U10 controller The other half of U5 or U6 drives the linear opto isolator to create a current output proportional to the input voltage This current has an effective gain of 1 2 4 or 8 controlled by DMO and DM1
152. values as discussed in Section 4 Configuration and Service Modes If the error code still appears replace the UIF PCB 179 1 Turn the monitor off then on again If the error code is occurring while powering on after the replacement of the UIF PCB perform the procedure in paragraph 6 10 1 If the error code still appears verify compatibility of UIF Module SW ROM and SpO2 Module SW ROM part numbers by using service mode menu item 17 If the error code still appears contact Nellcor Puritan Bennett Technical Services or your local representative If the error code still appears verify compatibility of UIF Module SW ROM and SpO2 Module SW ROM part numbers by using service mode menu item 17 If the error code still appears contact Nellcor Puritan Bennett Technical Services or your local representative to ensure the numbers are compatible If the numbers are compatible power down and verify that the SpO2 Module ROM is securely seated Verify that the SpO2 Controller PCB and SpO2 module are securely seated Turn the monitor on If the error code still appears replace the SpO2 Controller PCB 7 If the error code still appears replace the UIF PCB 183 283 Turn the monitor off then on again 189 376 1 Turn the monitor off then on again 2 If the error code still appears replace the UIF PCB 192 195 1 Turn the monitor off then on again 196 2 Use the service mode menu item 29 to verify the compatibilit
153. ws communications between the N 3000 and a PC via the 6 pin connector on the rear panel of the N 3000 as illustrated in Figure 3 2 An ElA 232 cable and detailed directions for use are available by contacting your local Nellcor Puritan Bennett representative The serial port can also be used to provide remote monitoring of alarms when configured as explained in paragraph 4 4 Alarm Active F unction mn It IN It Figure 3 2 Serial Port Interface The two configurable options of serial data interface are RS 232 and EIA 422 The N 3000 is shipped with the RS 232 setting To change the settings refer to paragraph 6 5 1 3 15 Section 3 Performance Verification 3 16 Perform the following procedure to test the serial port voltages 1 Connect the monitor to an AC power source through the SPS power supply and turn the monitor on The serial port is functional only when the N 3000 is operated from an AC power source Connect a 6 pin miniature connector adapter to the serial interface port Set up the DMM with the function set to VDC at a range of 10 volts Connect the DMM negative lead to connector pin 4 GND Ui e W N Connect the DMM positive lead to the following pins and verify the voltage values listed in Table 3 1 If the voltages are not as indicated follow the procedures in paragraph 5 6 7 1 2 3 4 5 6 Figure 3 3 Serial Port Connector External
154. xtension cables with a damp cloth For sensors and ECG leads follow the individual directions for use PERIODIC SAFETY AND FUNCTIONAL CHECKS BATTERIES The following checks should be performed at least every 2 years by a qualified service technician 1 Inspec the exterior of the N 3000 for damage 2 Inspect safety labels for legibility If the labels are not legible contact Nellcor Puritan Bennett s Technical Services Department or your local Nellcor Puritan Bennett representative 3 Verify that the unit performs properly as described in paragraph 3 3 4 Perform the electrical safety tests detailed in paragraph 3 4 If the unit fails these electrical safety tests do not attempt to repair Contact Nellcor Puritan Bennett s Technical Services Department or your local Nellcor Puritan Bennett representative 5 Inspect the fuses for proper value and rating F 1 1 0 Amp 250 Volt Slo Blow and F 2 2 5 Amp 250 Volt Slo Blow as discussed in paragraph 6 4 Nellcor Puritan Bennett recommends replacing instrument batteries at least every 2 years To replace the batteries refer to Section 6 Disassembly Guide If the N 3000 has been stored for more than 30 days charge the battery as described in paragraph 3 3 2 A fully discharged battery requires 14 hours charging time for a full charge A 6 hour charge is required for 1 hour of operating time INTRODUCTION 3 1 Introduction 3 2 Equipment Needed 3 3 Performance Tests
155. y Display Board Figure S4 5 Display Board Block Diagram Technical Supplement The display driver ICs consist of U1 U2 and U3 which use a three wire serial interface connect to the CPU U3 on the UIF module The three drivers used on this module are cascaded together and require that the host processor write 48 bits 16 x 3 to the board per each display update The front panel POWER LED DS23 is lit whenever the monitor power supply is on The drivers do not provide power to light the BATTERY CHARGING indicator current for this LED is provided by the UIF module There are four buttons on the display panel the ON STANDBY button SW2 is connected directly to the UIF module The other three UPPER ALARM LIMIT SW1 LOWER ALARM LIMIT SW3 and PRINT SW4 are resistor weighted and attached via one signal line to an A D channel of the UIF module U4 is employed as a drain device to guarantee a certain resistance value when a button is pressed TheJ 1 connector pinouts are as follows 1 5V power for display drivers 8 NC 2 5V power for display drivers 9 ON button signal ONBUTTON 2 5V power for green LED GREENPWR 10 Button signal BUTRES 4 Serial clock to display drivers SERCLK 11 NC 5 Load data to display drivers LED1EN 12 NC 6 Serial data to display drivers SERDATA 13 Ground 7 Current source to battery charging 14 Ground indicator CHRGPWR SCHEMATIC DIAGRAMS The following part locator diagrams and
156. y of your software 3 If the error code still appears verify compatibility of the ROMs by calling Nellcor Puritan Bennett Technical Services or your local representative 203 206 1 Turn the monitor off then on again 211 If the error code still appears power down the monitor and replace the SpO2 Controller PCB 204 205 1 Turn the monitor off then on again If the error code still appears power down the monitor and replace the SpO2 PCB If the error code still appears power down the monitor and replace the SpO2 Controller PCB 56 Section 5 Troubleshooting Table 5 3 N 3000 Failure Error Codes Continued Error Code Recommended Action 275 276 Turn the monitor off then on again If the error code still appears power down and verify that the SpO2 Controller PCB is securely seated If the error code still appears replace the SpO2 Controller PCB If the error code still appears power down the monitor and replace the UIF PCB 308 310 Turn the monitor off then on again If the error code still appears power down the monitor and replace the ECG PCB 5 6 3 Buttons Knob Table 5 4 lists symptoms of problems relating to nonresponsive buttons or the Nalcor Puritan Bennet knob and recommended actions If the action requires replacement of a PCB refer to Section 6 Disassembly Guide Table 5 4 Buttons Knob Problems 1 The N 3000 turns on If possible verify the problem with

SERVICE MANUAL - Frank`s Hospital Workshop

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