Nellcor
OxiMax NPB-40 Service Manual Rev A July 2002
Service Manual
114 Pages
Preview
Page 1
Nellcor Puritan Bennett Inc. is an affiliate of Tyco Healthcare. Nellcor, Oxiband, Durasensor, OxiCliq, Dura-Y, MAX-FAST, and OXIMAX are trademarks of Nellcor Puritan Bennett Inc. This ISM device complies with Canadian ICES-001. Cet appareil ISM est conforme à la norme NMB-001 Canada. To obtain information about a warranty, if any, contact Nellcor’s Technical Services Department, or your local representative. Purchase of this instrument confers no express or implied license under any Nellcor Puritan Bennett patent to use the instrument with any sensor that is not manufactured or licensed by Nellcor Puritan Bennett. Covered by one or more of the following U.S. Patents and foreign equivalents: 4,653,498; 4,802,486; 4,869,254; 4,928,692; 4,934,372; 5,078,136; 5,351,685; 5,485,847; 5,533,507; 5,577,500; 5,803,910; 5,853,364;5,865,736; 6,083,172; 6,463,310; 6, 708, 049; and Re.35,122.
Contents Contents...i Figures... iv Tables... v Introduction... 1 Warnings ...1 Cautions ...2 Notes ...2 Manual Overview ...2 Description of NPB-40 ...3 Identification of Front Panel Buttons and Symbols ...3 Function Menu ...6 Structure ...7 Related Documents ...9
Routine Maintenance... 11 Cleaning ...11 Periodic Safety Checks ...11 Functional Checks ...11 Battery Installation ...12
Performance Verification... 15 Introduction ...15 Equipment Needed ...15 Performance Tests ...15 Power-On Self-Test ...15 Discussion ...15 Procedure ...16 Operational Setup ...19 Setting the Time and Date ...20 Discussion ...20 Procedure ...20 General Operation ...23 Operation with a Live Subject ...23 Pulse Oximetry Functional Tests ...24 Introduction ...24 Test Setup ...25 Test #1: BPM ...26 Test #2: SpO2 ...27 Test #3: Modulation Level ...28 Test #4: Light Level ...29 Safety Tests ...31
Troubleshooting... 33 Introduction ...33 How To Use This Section ...33 Who Should Perform Repairs ...33 NPB-40
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Contents Troubleshooting Guide ... 33 Error Codes ... 37
Disassembly Guide... 43 Introduction ... 43 Tools Required ... 43 Replacement Level Supported ... 43 Prior to Disassembly ... 43 Separating the Front and Back Cases ... 44 CPU PCB or Display PCB Replacement ... 46 Front Case Assembly Replacement ... 49 Rear Case Assembly Replacement ... 52 Battery Compartment Door Replacement ... 54
Spare Parts... 55 Introduction ... 55 Obtaining Replacement Parts ... 55 Parts List and Accessories ... 55
Packing for Shipment... 59 Introduction ... 59 Returning the NPB-40 ... 59 Repacking in Original Carton ... 59 Packing in a Different Carton ... 60
Specifications... 63 Performance ... 63 Electrical ... 67 Environmental Conditions ... 68 Physical Characteristics ... 69 Compliance ... 69 Manufacturer’s Declaration ... 69
Technical Discussion... 75 Oximetry Overview ... 75 Functional versus Fractional Saturation ... 75 Measured versus Calculated Saturation ... 76 SatSeconds Alarm Management ... 76 Reads Through Motion ... 77 OXIMAX Technology ... 77 Block Diagram Theory ... 77 SpO2 Printed Circuit Board ... 78 Patient Interface ...78 Power Supply ...79 Power Monitoring ...79 User Interface Printed Circuit Board ... 79 Keypad ...80 Backlight ...80 CPU and Flash ...80 Real-Time Clock ...80 Audio ...80 LCD ...81 IrDA ...81
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Contents Power Supply ...81 Power Supply Monitoring ...81
Index... 103
NPB-40
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Contents
Figures Figure 1: Installing Batteries ... 12 Figure 2: SRC-MAX OXIMAX Oximetry Tester ... 24 Figure 3: Typical Error Code Display ... 34 Figure 4: Installing Batteries ... 44 Figure 5: NPB-40 Case Screws ... 44 Figure 6: Cases Separated ... 45 Figure 7: CPU PCB Connector J3 Lock ... 45 Figure 8: Display PCB and CPU PCB Removal ... 46 Figure 9: Separating the Display PCB and CPU PCB ... 47 Figure 10: Connecting PCBs ... 47 Figure 11: Battery Spring Alignment ...48 Figure 12: Installing The Case Screws ... 48 Figure 13: Battery Installation ... 49 Figure 14: Front Case Ribbon Cable Connection ... 50 Figure 15: Locking CPU PCB Connection to J3 ... 50 Figure 16: Installing The Case Screws ... 51 Figure 17: Battery Installation ... 51 Figure 18: Display PCB and CPU PCB Removal ... 52 Figure 19: Battery Spring Alignment ...53 Figure 20: Installing The Case Screws ... 53 Figure 21: Battery Installation ... 54 Figure 22: Battery Compartment Door Latch ...54 Figure 23: Exploded View ... 57 Figure 24: Packing ... 60 Figure 25: Oxyhemoglobin Dissociation Curve ... 76 Figure 26: Block Diagram ... 78 Figure 27: SpO2 PCB Schematic Diagram (Sheet 1 of 7) ... 83 Figure 28: SpO2 PCB Schematic Diagram (Sheet 2 of 7) ... 85 Figure 29: SpO2 PCB Schematic Diagram (Sheet 3 of 7) ... 87 Figure 30: SpO2 PCB Schematic Diagram (Sheet 4 of 7) ... 89 Figure 31: SpO2 PCB Schematic Diagram (Sheet 5 of 7) ... 91 Figure 32: SpO2 PCB Schematic Diagram (Sheet 6 of 7) ... 93 Figure 33: SpO2 PCB Schematic Diagram (Sheet 7 of 7) ... 95 Figure 34: User Interface PCB Schematic Diagram (Sheet 1 of 3) ... 97 Figure 35: User Interface PCB Schematic Diagram (Sheet 2 of 3) ... 99 Figure 36: User Interface PCB Schematic Diagram (Sheet 3 of 3) ...101
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Contents
Ta b l e s Table 1: Table 2: Table 3: Table 4: Table 5: Table 6: Table 7:
NPB-40
Menu Structure ...7 Time Set Menu ...8 Troubleshooting Guide ...34 Error Codes ...37 Parts and Accessories List ...55 Electronic Emissions ...71 Electromagnetic Immunity ...72
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Tables
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Introduction Warnings
Warnings are identified by the WARNING symbol shown above. Warnings alert the user to potential serious outcomes (death, injury, or adverse events) to the patient or user. WARNING: The sensor uses the date and time provided by the NPB-40 handheld pulse oximeter when the sensor event record is recorded by the sensor. The accuracy of the date/time is dependent on the date/time already set in and provided by the NPB-40.
WARNING: Explosion hazard. Do not use the NPB-40 in the presence of flammable anesthetics mixed with air, oxygen, or nitrous oxide.
WARNING: Do not spray, pour, or spill any liquid on the NPB-40, its accessories, connectors, switches, or openings in the chassis.
WARNING: The LCD panel contains toxic chemicals. Do not ingest chemicals from a broken LCD panel.
WARNING: The use of accessories, OXIMAX sensors, and cables other than those specified may result in increased emission and/or decreased immunity of the NPB-40.
WARNING: Do not silence the NPB-40 audible alarm or decrease its volume if patient safety could be compromised.
NPB-40
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Introduction
Cautions
Cautions are identified by the CAUTION symbol shown above. Cautions alert the user to exercise care necessary for the safe and effective use of the NPB-40. Caution: Observe ESD (electrostatic discharge) precautions when working within the unit. Caution: Observe ESD (electrostatic discharge) precautions when disassembling and reassembling the NPB-40 and when handling any of the components of the NPB-40. Caution: When reassembling the NPB-40, tighten the screws that hold the cases together to a maximum of ten inch-pounds. Over-tightening could strip out the screw holes in the front case, rendering it unusable. Caution: When installing the Power Supply or the User Interface PCB, tighten the seven screws to a maximum of four inch-pounds. Over-tightening could strip out the screw holes in the bottom case, rendering it unusable.
Notes
Notes are identified by the Note symbol shown above. Notes provide useful helpful information.
Manual Overview This manual contains information for service personnel who will service the Nellcor model OXIMAX NPB-40 handheld pulse oximeter (herein referred to as the NPB-40). Only qualified service personnel should service this product. Read the operator's manual carefully and thoroughly understand the operation of the NPB-40. WARNING: Explosion hazard. Do not use the NPB-40 in the presence of flammable anesthetics mixed with air, oxygen, or nitrous oxide.
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Introduction
Description of NPB-40 The OXIMAX NPB-40 handheld pulse oximeter (herein referred to as the NPB-40) is indicated for non-invasive, spot-check measurements of functional arterial oxygen saturation (SpO2) and pulse rate of adult, pediatric, and neonatal patients. It can be used in hospital, emergency, transport, and mobile environments, as well as in the home care environment.
Identification of Front Panel Buttons and Symbols Refer to the NPB-40 Operator’s manual for a complete description of all buttons, symbols, controls, displays and indicators.
1 - %SpO2 area of display 2 - Measured %SpO2 3 - Pulse beats per minute (bpm) area of display 4 - Measured bpm
NPB-40
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Introduction
5 - %SpO2 Lower Alarm Limit indicator 6 - %SpO2 Upper Alarm Limit indicator 7 - Pulse Amplitude indicator (blip bar) 8 - Time colon time/date field separator 9 - Adjust Time mode indicator 10 - Adjust Volume mode indicator 11 - Set Limit mode indicator 12 - BPM Upper Alarm Limit indicator 13 - BPM Limit Changed indicator 14 - Sensor Off Patient indicator 15 - Sensor Disconnected indicator 16 - %SpO2 Limit Changed indicator
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Introduction
17 - BPM Lower Alarm Limit indicator 18 - Print indicator 19 - Motion indicator 20 - Pulse Beep Tone Volume Adjust indicator 21 - Pulse Search indicator 22 - Alarm Volume Adjust indicator 23 - Data In Sensor indicator 24 - Data indicator 25 - Low Battery indicator 26 - Alarm Silenced indicator
NPB-40
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Introduction
27 - Power button 28 - Up Arrow button 29 - Backlight button 30 - Menu button 31 - Data (record/print) button 32 - Down Arrow button 33 - Alarm Silence button
Function Menu Pressing the Menu button repeatedly during normal operation sequentially shows seven parameter-setting displays, one for each button activation, and then returns to the default monitoring display. Settable parameters include high and low SpO2 limits, high and low bpm limits, alarm volume, pulse beep volume, and data printing. Pressing the Menu button during start-up Power-On Self-Test (POST) test accesses the Time/Date setting menu. Repeated activations of the Menu button in this menu sequence shows five time/date parameter-setting displays that allows the user to set Hour, Minute, Day, Month, and Year, and then return to the POST display.
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Introduction
Structure Table 1: Menu Structure # of Presses
Press
Function
SpO2 Low
Adjust limit
SpO2 High
Adjust limit
3
BPM Low Limit
Adjust limit
4
BPM High Limit
Adjust limit
5
Pulse Beep Volume
Adjust volume. Indications on blip bar.
6
Alarm Volume
Adjust volume. Indications on blip bar.
7
Print Data
Print summary and/or stored snap-shot and sensor-event data.
1
2
NPB-40
Parameter
Limit
Limit
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Introduction
Table 2: Time Set Menu # of Presses
Parameter
The
must be pressed during the NPB-40 POST.
1
Hour
Adjust 1 to 23
2
Minute
Adjust 1 to 59
3
Day
Adjust 1 to 31
4
Month
Adjust 1 to 12
5
Year
Adjust 2003 to 2099
Press
Function
When the month entry is made, the NPB-40 checks the day selection to see if it is correct. If the day selection is not valid for the month selected the NPB-40 display returns to the day selection display. When the year entry is made, the NPB-40 checks the day and month selections to see if they are correct. If the day or month selection is not valid for the year selected the NPB-40 display returns to the day selection display. Some examples of illegal dates are:
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•
30 February
•
31 February
Introduction
•
31 April
•
31 June
•
31 September
•
31 November
•
29 February on a non-leap year
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 NPB-40. Refer to the NPB-40 operator's manual. To understand the various Nellcor approved OXIMAX sensors that work with the NPB-40, refer to the individual OXIMAX sensor's Directions For Use. The latest version of the operator’s manual and the service manual are posted on the Internet at: http://www.mallinckrodt.com/respiratory/resp/Serv_Supp/ProductManuals.html
Spare Parts and Accessories are posted on the Internet at: http://www.mallinckrodt.com/respiratory/resp/Serv_Supp/Apartweb/main/PartAcceMenu.html
NPB-40
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Introduction
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Routine Maintenance Cleaning WARNING: Do not spray, pour, or spill any liquid on the NPB-40, its accessories, connectors, switches, or openings. For surface-cleaning and disinfecting follow your institution's procedures or: •
The NPB-40 may be surface-cleaned by using a soft cloth dampened with either a commercial, nonabrasive cleaner or a solution of 70 percent alcohol in water, and lightly wiping the surfaces of the NPB-40.
•
The NPB-40 may be disinfected using a soft cloth saturated with a ten percent solution of chlorine bleach in tap water.
Before attempting to clean an SpO2 OXIMAX sensor, read the Directions For Use enclosed with the OXIMAX sensor. Each sensor model has cleaning instructions specific to that sensor.
Periodic Safety Checks The NPB-40 requires no calibration. The following checks should be performed at least every 24 months by a qualified service technician. 1. Inspect the equipment for mechanical and functional damage. 2. Inspect safety labels for legibility. If the labels are damaged, contact Nellcor’s Technical Services Department, 1.800.635.5267, or your local Nellcor representative.
Functional Checks If the NPB-40 has been visibly damaged or subjected to mechanical shock (for example, if dropped), immediately perform the performance tests. See Performance Tests on page 15. The following check should be performed at least every two years by a qualified service technician. •
NPB-40
Perform the electrical safety tests detailed in Safety Tests on page 31. If the unit fails these electrical safety tests, refer to Troubleshooting on page 33. 11
Routine Maintenance
Battery Installation Caution: The NPB-40 does not operate with dead batteries. Install new batteries. 1. Press Power to turn the NPB-40 off. 2. Pull the battery compartment latch downward, toward the bottom of the NPB-40, and remove the battery access door. See Figure 1. 3. Install four “AA” size batteries, orientated as shown in Figure 1. 4. Replace the battery access door.
1 - Battery compartment latch
Figure 1: Installing Batteries WARNING: Explosion hazard. Do not use the NPB-40 in the presence of flammable anesthetics mixed with air, oxygen, or nitrous oxide.
WARNING: To ensure patient safety, do not place the in any position that might cause it to fall on the patient.
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Routine Maintenance
WARNING: As with all medical equipment, carefully route patient cabling to reduce the possibility of patient entanglement or strangulation.
WARNING: To ensure accurate performance and prevent device failure, do not expose the NPB-40 to extreme moisture such as rain.
NPB-40
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