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Novametrix Medical Systems 7300 Service Manual

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Model 7300
Service Manual
Aug 27, 1999
Part Number 9226-90-00
Novametrix Medical Systems Inc.
P.O. Box 690
5 Technology Drive
Wallingford, Connecticut, U.S.A. 06492.

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  • Page 1 Model 7300 Service Manual Aug 27, 1999 Part Number 9226-90-00 Novametrix Medical Systems Inc. P.O. Box 690 5 Technology Drive Wallingford, Connecticut, U.S.A. 06492.
  • Page 3 Service Policy Novametrix Medical Systems Inc. provides 24-hour a day access to technical support through its Technical Support Department in Wallingford, Connecticut, and company Service Representatives located throughout the United States. (Outside the U.S., primary technical support is handled through our qualified international sales and service distributors.)
  • Page 4 Warranty Equipment manufactured or distributed by Novametrix Medical Systems Inc., is fully guaranteed, covering materials and workmanship, for a period of one year from the date of shipment, except for certain disposable products and products with stated guarantees other than one year. Novametrix reserves the right to perform guarantee service(s) at its factory, at an authorized repair station, or at the customer’s installation.

  • Page 5: Table Of Contents

    Trademarks and Patents .......................... 6 Manual Revision History ........................... 6 Theory of Operation ............................7 NICO Model 7300 Non-Invasive Cardiac Output Monitor ................. 7 Digital Board 2763 ............................ 7 Microprocessor ..........................7 Background Mode Debugging and Application Development ............11 System Memory ..........................
  • Page 6 2 ......................................52 Monitor Specifications ..........................52 NICO Accessories ............................53 Parts Lists ..............................55 9226-00 Non-Invasive Cardiac Output Monitor, Model 7300 ..............55 9226-01 Main Assy ..........................55 2763-01 Digital Board Assy ........................56 2764-01 Power Board Assy ........................58 2765-01 Analog Board Assy ........................

  • Page 7: Safety

    • The NICO sensor connector should be properly inserted into the front panel receptacle prior to connecting the NICO sensor to the breathing circuit, in order to avoid a circuit leak, or occlusion of the NICO sensor tubing. Model 7300 Service Manual Rev 00...

  • Page 8: Cautions

    A point of particular interest or emphasis intended to provide more efficient or convenient operation. • In order to ensure proper monitoring of oxygenation and ventilation: • The use of pulse oximetry is recommended during NICO monitoring. • Setting of ETCO and SpO alert limits is recommended. Model 7300 Service Manual Rev. 00...
  • Page 9 • There is no screen indication during monitoring, except on start-up (or when the SET ALERTS screen is displayed), as to when the NICO alert settings are off. Model 7300 Service Manual Rev. 00...
  • Page 10 Safety Notes [This page intentionally blank.] Model 7300 Service Manual Rev. 00...

  • Page 11: Introduction

    About this manual This document contains information which is proprietary and the property of Novametrix Medical Systems Inc., and may not be reproduced, stored in a retrieval system, translated, transcribed, or transmitted, in any form, or by any means, without the prior explicit written permission of Novametrix Medical Systems Inc.

  • Page 12: Nico Monitor Technical Description

    Operating Conditions: 10 to +40° C (50 to 104° F), 10-90% R.H. non-condensing Manufacturing Quality & Safety The Novametrix Medical Systems Inc. manufacturing facility is certified to both ISO 9001 and EN46001 (MDD93/42/EEC Annex II). Novametrix’ products bear the “CE 0086” mark. The product is certified by Underwriter’s Laboratories (UL) to bear the UL mark;...

  • Page 13: Theory Of Operation

    Theory of Operation NICO Model 7300 Non-Invasive Cardiac Output Monitor The NICO model 7300 monitor measures cardiac output based on changes in respiratory CO concentration caused by a brief period of rebreathing. The measurement of cardiac output is accomplished by interpreting data collected by...
  • Page 14 Enables circuitry for CO and Reference channel data acquisition. Low = Sample, 90 us, High = Hold CASEPWM Case Heater PWM PWM control for the case heater servo Table 2: TPU Timing Generation for the etCO subsystem Model 7300 Service Manual Rev. 00...
  • Page 15 MPU brings the status signal SYSUP high, indicating that the system is ready for patient monitoring operation. Port Pin Functions System Signal Comments Name Table 4: Chip Select, Control and Discrete I/O Model 7300 Service Manual Rev. 00...
  • Page 16 Address Strobe SIZ0* / PE6 SIZ0 Signifies current operation is 8-bit data SIZ1* / PE7 CNFG2 Configuration Switch 2 R/W* Data Read Strode Data Write Strobe Table 4: Chip Select, Control and Discrete I/O Model 7300 Service Manual Rev. 00...

  • Page 17: Background Mode Debugging And Application Development

    FLASH device. Two 128K x 8- bit Static RAMs (IC3 and IC6) contain volatile data storage for use as a temporary data scratch pad during system operation and for recording patient trend information. To Model 7300 Service Manual Rev. 00...

  • Page 18: User Interface Control Circuitry

    Refer to sheet 2 on 2763-03 schematic. Time keeping for date and time stamping of patient trend information is provided by Real Time Clock IC16. This device contains a built in crystal for precise time and date Model 7300 Service Manual Rev. 00...

  • Page 19: Power Supply 2764 (Power Supply And Communications)

    Serial Channel A Receive Serial Channel A Transmit No Connection Isolated Ground Non-Patient Signal Ground No Connection No Connection No Connection No Connection Table 5: Serial Channel A, 9-pin D-subminiature connector located on the rear panel Model 7300 Service Manual Rev. 00...
  • Page 20 Table 7: Serial Channel C, 9-pin D-subminiature connector located on the rear panel Pin Number Signal Function Isolated Non-Patient Signal Ground Ground ADCIN0 ADC Input Channel 0 Table 8: Analog Connector, 15-pin D-subminiature connector located on the rear panel Model 7300 Service Manual Rev. 00...

  • Page 21: Co 2 Pulser Source Drive

    When current flows through the source, it will also flow through current sensing resistor R23, creating a differential voltage proportional to the source current. This voltage is Model 7300 Service Manual Rev. 00...

  • Page 22: Capnostat Case And Detector Heater Control

    Both heaters use an efficient Pulse-Width Modulation scheme designed to decrease power consumption, with the PWM timing generated by the TPU under microprocessor Model 7300 Service Manual Rev. 00...

  • Page 23: Saturation Led Power Generation And Led Drive

    Power On / Off control is achieved by sensing the state of the power switch located on the front panel. A high to low transition on the PWRSW line is debounced by C85 and IC31A, and clocked into Flip-flop IC32A, which causes the Flip- Model 7300 Service Manual Rev. 00...
  • Page 24 AC stand-by or DC Power Down operating mode. Charging the battery takes place as long as the unit is connected into a viable source of AC MAINS power and the power entry module switch is in the “On” position. In order Model 7300 Service Manual Rev. 00...
  • Page 25 DVDD +5VDC Regulated and filtered logic supply for general analog sub- systems ADCVDD +2.14VDC ADC input for monitoring VDD +14VDC (nominal) Loosely regulated off of the 5VDC feedback line Table 9: Power Supply Outputs Model 7300 Service Manual Rev. 00...

  • Page 26: Logic And Input / Output Signal Control

    2 with a corner frequency of 1.5 kHz. The output from the low pass filter is fed to a 12-bit Digital to Analog converter IC14. The signal, CO2DFB comes into the feedback pin of the DAC, which acts as a programmable gain stage. Here, under Model 7300 Service Manual Rev. 00...

  • Page 27: Co Case And Detector Heater Regulation

    This error voltage is low pass filtered by amplifier IC8B, sent to the ADC and processed by the CPU to regulate the output pulses from the TPU. The error voltage out of amplifier IC9B also appears at the temperature watchdog comparator IC10A. If the Model 7300 Service Manual Rev. 00...

  • Page 28: Flow Zeroing And Patient Line Purging

    0 differential pressure (no-flow) point to mid-scale (during the zeroing process described earlier), negative pressure readings (P2>P1) are also available. The transducer is temperature compensated at 25 degrees Celsius and designed to be driven by a constant voltage source. Model 7300 Service Manual Rev. 00...

  • Page 29: Barometric And Airway Pressure

    LED's light will cause its photodetector mate to be turned on, which generates a signal that is sensed by the system and relayed back to the CPU. If the segment is non-reflective, no signal is returned to the sensing circuitry. Model 7300 Service Manual Rev. 00...

  • Page 30: Nico Sensor Rebreathing Valve Control

    TPU. Amplifier IC38A generates an analog signal, SPO2PROB, that varies with the saturation probe type. SPO2PROB is converted to digital form by ADC IC9 on the NICO 2763-01 Digital Board Schematic. Model 7300 Service Manual Rev. 00...

  • Page 31: Functional Testing

    Functional Testing The functional Testing verifies overall functional integrity of the monitor and sensor. If the Model 7300 does not pass these tests, remove from use and contact the Novametrix Service Department for repair/replacement assistance. Refer to the Accuracy Tests for testing the rear panel connectors.
  • Page 32 29. Remove the finger sensor from your finger. Verify a PULSE SEARCH message is displayed. 30. Follow steps 20. 21. and 22. to return the low pulse limit to the previous value. Model 7300 Service Manual Rev. 00...
  • Page 33 Set the power entry module switch back ON. 35. The test is complete. Disconnect the sensors from the monitor and turn it off. Model 7300 Service Manual Rev. 00...
  • Page 34 Functional Testing Functional Test [This page intentionally blank.] Model 7300 Service Manual Rev. 00...

  • Page 35: Accuracy Tests

    Accuracy Tests The Accuracy Tests verifies the performance accuracy of the Model 7300. This test is typically performed in conjunction with (after) the Functional Tests. If the monitor does not pass the Accuracy Tests, remove from use and contact the Novametrix Service Department for repair/replacement assistance.

  • Page 36: Spo Testing

    21. Turn the TB500B ON. Verify the status returns to “0”. 22. Press and hold the RED open test button on the TB500B. Verify the status is “13 IR LED FAIL”. 23. Release the RED open test button. Verify the status returns to “0”. Model 7300 Service Manual Rev. 00...

  • Page 37: Flow Testing

    42. Select the setup screen. Verify the setup screen is displayed. 43. Select SET TIME & DATE option. Follow the instructions and set the correct time and date. Exit the SET TIME & DATE screen then exit the setup screen. Model 7300 Service Manual Rev. 00...
  • Page 38 Accuracy Tests Time / Date Setting [This page intentionally blank.] Model 7300 Service Manual Rev. 00...

  • Page 39: Electronic Tests

    Certain error conditions can be simulated to verify responses from the monitor under test. The TB1265 is an optional test device and is not mandatory for testing the Model 7300. Its purpose is to increase test efficiency by simulating a working CAPNOSTAT. The TB1265 Sensor Simulator is available from Novametrix Service Department.

  • Page 40: Power Supply

    13.77V ± 500mV. Remove the resistor. 7. Connect the 30 ohm resistor across the battery terminal connectors from J7. Using an oscilloscope, verify pulses present, the peak of the pulses should not be higher than 13.77V ± 500mV. Model 7300 Service Manual Rev. 00...

  • Page 41: Voltage Checks

    VCAPNO L1 pin 6 12.00V ± 500mV FVDD IC26 pin 14 5.00V ± 200mV IC7 pin 2 -16.00V ± 2.50V -VCAPNO IC3 pin 1 -12.00V ± 500mV -AVCC IC13 pin 13 -5.00V ± 250mV Model 7300 Service Manual Rev. 00...
  • Page 42 DVDD IC20 pin 14 5.00V ± 150mV VBACK IC6 pin 32 4.50V ± 250mV VBATT 12.60V ± 500mV VHTR 12.15V ± 500mV IC21 pin 8 16.50V ± 2.50V IC21 pin 4 -16.50V ± 2.50V Model 7300 Service Manual Rev. 00...

  • Page 43: Co 2 Testing

    260 and CASE T and DET T slowly rise and stabilize at 45.00 ± 0.20 within two minutes. 26. Disconnect the TB1265 from the monitor. Testing 27. Select SpO from the CO2 DIAGNOSTIC SCREEN. Model 7300 Service Manual Rev. 00...

  • Page 44: Flow, Barometric Pressure And Rebreathe Valve Testing

    48. Connect the “5” test jack to the monitor. Verify “(5) Unknown” is displayed. 49. Connect the “A” test jack to the monitor. Verify “(10) Unknown” is displayed. 50. Record the current barometric pressure from the calibrated barometer. Model 7300 Service Manual Rev. 00...
  • Page 45 66. Connect the NICO sensor to the monitor. Select REBREATHE. 67. Verify the pump starts and the PRESS2 ADC rises above 120. Select REBREATHE again, verify the PRESS2 ADC drops to 0. 68. Disconnect the NICO sensor. Model 7300 Service Manual Rev. 00...

  • Page 46: Serial / Analog Testing

    - Monitor ungrounded - Monitor ungrounded with polarity reversed 82. Measure the monitor AC leakage from the shorted saturation test jack to the hot side of the AC line. Verify a leakage current less than 25uA. Model 7300 Service Manual Rev. 00...

  • Page 47: Maintenance

    Model 7300. Maintenance Schedules The electronic circuits within the Novametrix Model 7300 monitor do not require scheduled calibration or service . However, in order to maximize battery life, the monitor’s internal battery should be tested monthly.

  • Page 48: Spo 2 Y-Sensor

    • Clean the sensor surface with a damp cloth. • Make certain that the sensor windows are clean and dry. • Do not immerse the CAPNOSTAT CO sensor. • Do not attempt to sterilize the CAPNOSTAT CO sensor. Model 7300 Service Manual Rev. 00...

  • Page 49: Disassembly

    Maintenance Disassembly Disassembly CAUTION: The Model 7300 contains static sensitive devices. Be sure to follow proper grounding procedures when handling the internal components to avoid damage from static discharge. 7.4.1 Equipment Required • Phillips screwdriver • Small flat-blade screwdriver 7.4.2 Disassembling Unit 1.

  • Page 50: Reassembling Unit

    Indicates heavy metal content, specifically lead. This symbol is found on the internal battery and the monitor enclosure. 1. Remove the line cord from the unit (if installed). 2. The internal battery will slowly discharge over long periods of non-use. Model 7300 Service Manual Rev. 00...

  • Page 51: Mains Voltage Configuration

    The rear panel indicates the mains voltage setting for the monitor. Check that the voltage is correct before attaching the line cord and powering the monitor. The Model 7300 can operate from 100-120 VAC 50/60Hz or 200-240VAC 50/60Hz. Clamp for power...

  • Page 52: Fuse Replacement

    2. Set the rear panel power entry module switch to OFF (“O”). Remove the line cord from the power entry module (if connected). 3. Using a flat blade screwdriver, pry the fuse access door open to expose the fuse housing. POWER ENTRY MODULE FUSE HOUSING FUSE ACCESS DOOR Model 7300 Service Manual Rev. 00...

  • Page 53: Software Update Instructions

    3. Update diskette PN: 9571-07-XX (XX = new firmware version) 4. Reply card 7.9.2 Setup 1. Connect the serial cable to the rear panel 9 pin connector marked “1” on the NICO (see FIG. A). Model 7300 Service Manual Rev. 00...

  • Page 54: Procedure

    3. The location and availability of the COM ports (COM1, COM2) will vary from computer to computer. Refer to the com- NICO puter’s documentation for more information. The update software can only communicate with the through either COM1 or COM2. Model 7300 Service Manual Rev. 00...
  • Page 55 9. Remove the serial communications cable from the PC and the NICO. Record the serial number from the NICO on the reply card. Fill in the remaining information and return the postage paid card to Novametrix. Model 7300 Service Manual Rev. 00...
  • Page 56 Maintenance Software Update Instructions [This page intentionally blank.] Model 7300 Service Manual Rev. 00...

  • Page 57: Specifications

    Specifications General Specifications for the Novametrix NICO Monitor, Model 7300, are listed for informational purposes only, and are subject to change without notice. NICO • Measurement Frequency: Rebreathing cardiac output measurement made every three minutes, rebreathing period is 50 seconds.

  • Page 58: Flow Sensor

    • Electromagnetic Immunity: Conforms to EMC Directive 89/336/EEC, EN50082- 1 (1992). Tested to IEC801-3 (1984) Radiated Immunity. Conforms to Medical Device Directive 93/42/EEC EN60601-1 (1992). Tested to IEC801-2 (1991) ESD, IEC801-4 (1988) EFT, and IEC1000-4-5 (1995) Surge Immunity. Model 7300 Service Manual Rev. 00...

  • Page 59: Nico Accessories

    NICO Accessories Catalog No. Description 9226-00 NICO Non-Invasive Cardiac Output Monitor, Model 7300 Includes: Monitor, CAPNOSTAT CO Sensor, SpO Sensor, Power Cord and User’s Manual. 8951-00 NICO Sensors (10 per box) Standard size (for tidal volumes of 450 - 1400 mL) ®...
  • Page 60 NICO Accessories [This page intentionally blank.] Model 7300 Service Manual Rev. 00...

  • Page 61: Parts Lists

    Parts Lists 10.1 9226-00 Non-Invasive Cardiac Output Monitor, Model 7300 Item Part No. Description Quantity 1003-32 LABEL, SERIAL NUMBER 1217-32 REPAIR LABEL 4470-32 LABEL, CAUTION GROUNDING 9026-32 LABEL, MANUFACTURED IN USA 9226-01 MAIN ASSY 9486-32 LABEL SET, REAR PNL, 7300...

  • Page 62: 2763-01 Digital Board Assy

    Parts Lists 2763-01 Digital Board Assy Item Part No. Description Quantity 9489-16 MAIN FRAME, 7300 - NICO 9490-16 BEZEL, MODEL 7300 - NICO 9492-01 KNOB ASSY, MODEL 7300 161060 EPOXY, 2 PART (5/7), GRAY 161067 TAPE, CL CELL 210157 PWR MODULE, D FUSE, ON/OFF...
  • Page 63 RES PACK, 51 OHM, .1W 212543 CONNECTOR, 20 PIN, HEADER 486367 IC, DECADE COUNTER, HIGH 486055 IC, STATIC RAM, 4M BIT 2763-02 FAB, DIGITAL BOARD 2763-03 SCHEMATIC, DIGITAL BOARD 212610 CONN, 24 PIN, HEADER Model 7300 Service Manual Rev. 00...

  • Page 64: 2764-01 Power Board Assy

    TEST POINT, SPRING LOADED 211327 CONNECTOR, 3 PIN, HEADER 9428-07 PROGRAM, CPLD 515094 FUSE WITH FUSEHOLDER, 3A 9569-07 PRGM, B CODE & SYS, 7300 153006 CAPACITOR, 47PF, 63V 5150S7 FUSE w FUSEHOLDER, lA 154069 CAPACITOR, 4.7UF, 10V 154105 CAPACITOR, 47PF, 50VDC...
  • Page 65 CONN, 96 PIN, RCPT, STR 485543 TRANSISTOR, MOSFET, N-CHAN 153045 CAPACITOR, .47UF, 50V 515087 FUSE W FUSEHOLDER, lA 481556 DIODE, MMBD354LT1, DUAL 474239 RESISTOR, 75K OHM, 1/16W 154108 CAPACITOR, 100PF, 50vDC 486781 IC, TLO72CD, OP AMP, JFET Model 7300 Service Manual Rev. 00...
  • Page 66 CRYSTAL, 7.3728 MHZ, 20PF 180057 INDUCTOR, 22UH, 20%, .05 486369 IC, 5V RS232 4-DRIVER 487145 IC, OPTOCPLR, DUAL, LOGIC 515094 FUSE WITH FUSEHOLDER, 3A 213413 CONN, 40 PIN, HEADER 484575 VOLT RGLTR, 1.2V-37V, 3A Model 7300 Service Manual Rev. 00...
  • Page 67 RESISTOR, 3.32K OHM, 1/16 474230 RESISTOR, 3.32K OHM, 1/16 474224 RESISTOR, 100 OHM, 1/16W 474224 RESISTOR, 100 OHM, 1/16W 154104 CAPACITOR, .01UF, 50VDC 154104 CAPACITOR, .01UF, 50VDC 154079 CAPACITOR, lOUF, 25V, 10% 154079 CAPACITOR, lOUF, 25V, 10% Model 7300 Service Manual Rev. 00...

  • Page 68: 2765-01 Analog Board Assy

    CONNECTOR, 20 PIN, HEADER 486324 IC, DG444DY, QUAD SPST CM 474261 RESISTOR, 7.5K OHM, 1/16W 474251 RESISTOR, 61.9K OHM, 1/16 154086 cAPACITOR, 4.7UF, l0VDC 481546 DIODE, SWITCHING, SURF MT 481547 DIODE, BAT54, HOT CARRIER Model 7300 Service Manual Rev. 00...
  • Page 69 486833 IC, 4-INPUT & OUTPUT OP 2765-02 FAB, ANALOG BOARD 213414 CONN, 40 PIN, HDR, ELEV 9270-16 FL CONN, RCPT, 3 PT, 7300 9272-16 SEAL FL CONN, 7300 - NICO 9328-16 SUPPORT, XDUCER 9269-01 SPO2 CONN BRKT ASSY, 7300 484545...
  • Page 70 CAPACITOR, .0lUF, 50vDC 154105 CAPACITOR, 47PF, 50vDC 154105 CAPACITOR, 47P~, 50VDC 154106 CAPACITOR, 22PF, 50VDC 154106 CAPACITOR, 22PF, 50VDC 154112 CAPACITOR, .047UF, 16VDC 154112 CAPACITOR, .047UF, l6VDC 180030 INDUCTOR-CAP, 4700PF, 50V 180030 INDUCTOR-CAP, 4700PF, 50V Model 7300 Service Manual Rev. 00...

  • Page 71: 2766-01 Co 2 Input Board Assy

    10.7 9392-01 Pump W Rsvr Assy Item Part No. Description Quantity 9322-01 RESERVOIR ASSY 9397-10 MOUNTING PL, PUMP, 7300 161108 FOAM TAPE, 1/32THK x 3/4W 211328 CONNECTOR, 3 PIN, RCPT 250130 PUMP, DIAPHRAGM, 4.5V 250169 FILTER, INLINE, 25 MICRON 280192...
  • Page 72 Parts Lists 9392-01 Pump W Rsvr Assy [This page intentionally blank.] Model 7300 Service Manual Rev. 00...

  • Page 73: Drawings

    Overall Wiring Diagram 9226-01 Main Assembly, Model 7300 - NICO (5 sheets) 2763-01 Digital Board Assy, Model 7300 - NICO (3 sheets) 2763-03 Schematic, Digital Bd, Model 7300, NICO (3 sheets) 2764-01 Power Board Assy, Model 7300 - NICO (3 sheets)
  • Page 74 Drawings [This page intentionally blank.] Model 7300 Service Manual Rev. 00...

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