Nellcor Oximax NPB-40 User manual

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.

NPB-40 i
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

Contents
ii
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

Contents
NPB-40 iii
Power Supply ............................................................................81
Power Supply Monitoring ..........................................................81
Index . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 103

Contents
iv
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

Contents
NPB-40 v
Tables
Table 1: Menu Structure ....................................................................................7
Table 2: Time Set Menu ....................................................................................8
Table 3: Troubleshooting Guide ......................................................................34
Table 4: Error Codes .......................................................................................37
Table 5: Parts and Accessories List ................................................................55
Table 6: Electronic Emissions .........................................................................71
Table 7: Electromagnetic Immunity .................................................................72

Tables
vi
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NPB-40 1
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.

Introduction
2
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.

Introduction
NPB-40 3
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 — %SpO2area of display
2 — Measured %SpO2
3 — Pulse beats per minute (bpm) area of display
4 — Measured bpm

Introduction
4
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

Introduction
NPB-40 5
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

Introduction
6
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.
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

Introduction
NPB-40 7
Structure
Table 1: Menu Structure
# of
Presses Parameter Press Function
1SpO2Low
Limit
Adjust limit
2SpO2High
Limit
Adjust limit
3BPMLow
Limit
Adjust limit
4 BPM High
Limit
Adjust limit
5 Pulse Beep
Volume
Adjust volume. Indications
on blip bar.
6Alarm
Volume
Adjust volume. Indications
on blip bar.
7 Print Data Print summary and/or
stored snap-shot and
sensor-event data.

Introduction
8
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:
• 30 February
• 31 February
Table 2: Time Set Menu
# of
Presses Parameter Press Function
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

Introduction
NPB-40 9
•31April
•31June
• 31 September
•31November
• 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

Introduction
10
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NPB-40 11
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 SpO2OXIMAX 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.
• 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.

Routine Maintenance
12
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.
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.
1 — Battery compartment latch