Nellcor NPB-3900 User manual
SERVICE MANUAL
Nellcor Puritan Bennett
™
NPB-3900 Patient Monitor
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.
© 1998 Nellcor Puritan Bennett Inc. All Rights Reserved 047940A-0398
0123
Corporate Headquarters
Regional/Local Offices
Nellcor Puritan Bennett Inc.
4280 Hacienda Drive
Pleasanton, California 94588
U.S.A.
Tel. 510 463-3900 or
1-800-NELLCOR
U. S. Service Repair Center
Nellcor Puritan Bennett Inc.
2200 Faraday Avenue
Carlsbad, California 92008
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 Evergo House
38 Gloucester Road
Wanchai
Hong Kong
Tel. +852.2529.0363
Nellcor Puritan Bennett UK Ltd.
10, Talisman Business Centre
London Road
Bicester, Oxfordshire OX6 0JX
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 France
3 avenue du Canada, Bâtiment Sigma
LP851 Les Ulis
91975 Courtaboeuf Cedex
France
Tel. +33.1.69.82.14.66
Nellcor Puritan Bennett Germany GmbH
Black-&-Decker-Strasse 28
65510 Idstein
Germany
Tel. +49.6126.5930
Nellcor Puritan Bennett Italia S.r.L.
Via Edison 6
20090 Assago (MI)
Italy
Tel. +39.2.4577161
Nellcor Puritan Bennett Finland Oy
Kappelitie 8
02200 Espoo
Finland
Tel. +358.9.270.92.900
To obtain information about a warranty, if any, for this product, contact Nellcor Puritan Bennett
Technical Services or your local Nellcor Puritan Bennett representative.
Nellcor Puritan Bennett, Durasensor, Oxisensor II, Oxichip, C-Lock, and the Nellcor Puritan Bennett
knob configuration are trademarks of Nellcor Puritan Bennett Incorporated.
SureTemp is a trademark of Welch Allyn, Inc.
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; 4,928,692; 4,934,372; 5,078,136; 5,368,224; 5,632,555; Re.35,122.
TABLE OF CONTENTS
List of Figures
List of Tables
List of Figures..................................................................................................v
List of Tables..................................................................................................vi
Section 1: Introduction....................................................................................1-1
1.1 Manual Overview..................................................................................1-1
1.2 Warnings, Cautions, and Notes ........................................................... 1-1
1.3 NPB-3900 Patient Monitor Description................................................1-1
1.4 P-3900 Introduction.............................................................................. 1-2
1.5 Related Documents..............................................................................1-2
Section 2: Routine Maintenance .................................................................... 2-2
2.1 Cleaning............................................................................................... 2-2
2.2 Periodic Safety and Functional Checks...............................................2-2
2.3 Battery..................................................................................................2-2
2.4 Environmental Protection..................................................................... 2-3
Section 3: Performance Verification..............................................................3-1
3.1 Introduction .......................................................................................... 3-1
3.2 Equipment Needed .............................................................................. 3-1
3.3 Performance Tests...............................................................................3-2
3.4 Safety Tests.......................................................................................3-15
Section 4: Power-Up Defaults Menu and Diagnostic Mode......................... 4-1
4.1 Introduction .......................................................................................... 4-1
4.2 Power-Up Defaults Menu..................................................................... 4-1
4.3 Restoring Factory Settings................................................................... 4-4
4.4 Diagnostic Mode .................................................................................. 4-4
Section 5: Troubleshooting ............................................................................ 5-1
5.1 Introduction .......................................................................................... 5-1
5.2 How to use This Section ...................................................................... 5-1
5.3 Who Should Perform Repairs .............................................................. 5-1
5.4 Replacement Level Supported............................................................. 5-1
5.5 Obtaining Replacement Parts..............................................................5-2
5.6 Troubleshooting Guide......................................................................... 5-2
5.7 Troubleshooting the Oximetry Function.............................................5-11
5.8 P-3900 Troubleshooting Guide..........................................................5-17
Section 6: Disassembly Guide........................................................................6-1
6.1 Introduction .......................................................................................... 6-1
6.2 How to use This Section ...................................................................... 6-2
6.3 Disassembly Flow Charts.....................................................................6-2
6.4 Closed Case Disassembly...................................................................6-7
6.5 Front Case Disassembly.................................................................... 6-16
6.6 Rear Case Disassembly.....................................................................6-20
6.7 Main PCB Disassembly......................................................................6-22
Section 7: Spare Parts.....................................................................................7-1
7.1 Introduction .......................................................................................... 7-1
7.2 Top Level Assembly............................................................................. 7-1
7.3 Front Case Assembly........................................................................... 7-2
7.4 Rear Case Assembly ........................................................................... 7-2
7.5 Main PCB Assembly ............................................................................ 7-3
Table of Contents
iii
Table of Contents
7.6 P-3900 Printer...................................................................................... 7-4
Section 8: Packing For Shipment................................................................... 8-1
8.1 General Instructions............................................................................. 8-1
8.2 Repacking In Original Carton............................................................... 8-1
8.3 Repacking In a Different Carton........................................................... 8-1
Section 9: Specifications ................................................................................ 9-1
9.1 General ................................................................................................9-1
9.2 Safety Standards..................................................................................9-1
9.3 Electrical...............................................................................................9-2
9.4 Environmental......................................................................................9-2
9.5 Measuring Parameters.......................................................................... 9-2
9.6 Trends.................................................................................................. 9-7
9.7 P-3900 Printer (Optional).....................................................................9-7
Section 10: RS-232 Interface.........................................................................10-1
10.1 Serial Interface Connection.............................................................. 10-1
10.2 Nurse Call ........................................................................................ 10-1
10.3 Exporting Trend Data....................................................................... 10-2
Appendix - Technical Supplement..................................................................A-1
A-1 General................................................................................................A-1
A-2 Block Diagram.....................................................................................A-1
A-3 Isolated Patient Connection Section....................................................A-2
A-4 Temperature Measurement Circuit......................................................A-4
A-5 ECG Inputs..........................................................................................A-7
A-6 On/Off Power Control..........................................................................A-9
A-7 Audio Volume and Speaker Drive .....................................................A-11
A-8 Power Supplies..................................................................................A-12
A-9 NIBP Section.....................................................................................A-17
A-10 System A/D......................................................................................A-20
A-11 Buttons And Lights ..........................................................................A-22
A-12 SpO
2................................................................................................A-22
A-13 Microcontroller.................................................................................A-28
A-14 Program Storage/Execution ............................................................A-32
A-15 Dram Control...................................................................................A-33
A-16 Real Time Clock (RTC) ...................................................................A-34
A-17 Uart Operation.................................................................................A-36
A-18 FPGA Glue Logic.............................................................................A-37
iv
LIST OF FIGURES
Table of Contents
Figure 5-1: Preamplifier and PGA Outputs......................................................5-12
Figure 5-2: Filter Outputs and ADC Input ...................................................... 5-513
Figure 5-3: SpO
Figure 5-4: SpO
Figure 5-5: SpO
2 Module with an SRC-2......................................................... 5-14
2 Module with SRC-2 Drive Current Test at TP7....................5-15
2 Module with SRC-2.............................................................. 5-16
Figure 6-1: Top Level Disassembly Flow Chart.6-Error! Bookmark not defined.
Figure 6-2: Front Case Disassembly Flow Chart...............................................6-4
Figure 6-3: Rear Case Disassembly Flow Chart................................................6-5
Figure 6-4: Main Board Disassembly Flow Chart .............................................. 6-6
Figure A-1: NPB-3900 Block Diagram...............................................................A-2
Figure A-2: Temperature Measurement Circuit .................................................A-6
Figure A-3: ECG Processing Circuitry, First Stage............................................A-8
Figure A-4: ECG Processing Circuitry, Second Stage.......................................A-9
Figure A-5: Power ON/OFF Circuitry...............................................................A-10
Figure A-6: Watchdog Circuitry........................................................................A-11
Figure A-7: Audio Volume Circuitry..................................................................A-12
Figure A-8: Buck Power Regulator, Simplified Schematic & Waveforms........A-13
Figure A-9: Battery Charger Circuitry...............................................................A-14
Figure A-10: 3.3V Regulated Supply................................................................A-15
Figure A-11: 5V Regulated Supply Circuitry....................................................A-15
Figure A-12: LCD Bias Supply Circuitry...........................................................A-16
Figure A-13: LCD Backlight Supply Circuitry...................................................A-16
Figure A-14: Isolated ±5V Supply Circuitry......................................................A-17
Figure A-15: NIBP Power Sourcing Circuitry...................................................A-17
Figure A-16: NIBP Pump Control Circuitry.......................................................A-18
Figure A-17: NIBP Pressure Sensors Processing Circuitry.............................A-19
Figure A-18: Proportional Valve Powering Circuitry.........................................A-20
Figure A-19: A/D Circuitry................................................................................A-21
Figure A-20: Interfacing with SpO2 Processing...............................................A-23
Figure A-21: Microcontroller Signal Assignments............................................A-29
Figure A-22: Flash Timing Parameters............................................................A-32
Figure A-23: DRAM Timing Parameters..........................................................A-33
Figure A-24: RAS and CAS Timing..................................................................A-34
Figure A-25: Read Timing................................................................................A-35
Figure A-26: Write Timing................................................................................A-35
Figure A-27: Data Signal..................................................................................A-37
Figure A-28: Control Signal..............................................................................A-37
Figure A-29: NPB-3900 Top Assembly Drawing (Sheet 1 of 2).......................A-43
Figure A-29: NPB-3900 Top Assembly Drawing (Sheet 2 of 2).......................A-45
Figure A-30: NPB-3900 Front Case Assembly Drawing (Sheet 1 of 2)...........A-47
Figure A-30: NPB-3900 Front Case Assembly Drawing (Sheet 2 of 2)...........A-49
Figure A-31: NPB-3900 Rear Case Assembly Drawing...................................A-51
Figure A-32: P-3900 Assembly Drawing..........................................................A-53
Figure A-33: NPB-3900 Interconnect Diagram................................................A-55
Figure A-34: Main PCB Schematic Diagram (Sheet 1 of 5).............................A-57
Figure A-34: Main PCB Schematic Diagram (Sheet 2 of 5).............................A-59
Figure A-34: Main PCB Schematic Diagram (Sheet 3 of 5).............................A-61
Figure A-34: Main PCB Schematic Diagram (Sheet 4 of 5).............................A-63
Figure A-34: Main PCB Schematic Diagram (Sheet 5 of 5).............................A-65
Figure A-35: NPB-3900Patient Connector PCB Schematic Diagram..............A-67
v
Table of Contents
LIST OF TABLES
Table 1-1: Model Configuration..........................................................................1-2
Table 3-1: Required Test Equipment................................................................. 3-1
Table 3-2: SRC Settings and NBP-3900 Indications.........................................3-6
Table 3-3: Serial Interface Measurements....................................................... 3-13
Table 3-4: Current Test....................................................................................3-16
Table 3-5: Leakage Current............................................................................. 3-16
Table 4-1: Power-Up Defaults Menu..................................................................4-1
Table 4-2: A/D Channel Designators.................................................................4-7
Table 5-1: Problem Categories.......................................................................... 5-2
Table 5-2: Power Problems ............................................................................... 5-3
Table 5-3: Serviceable Hardware Error Codes..................................................5-5
Table 5-4: Error Code Categories...................................................................... 5-8
Table 5-5: Buttons/Knob Problems.................................................................... 5-9
Table 5-6: Display/Audible Tones Problems...................................................... 5-9
Table 5-7: Operational Performance Problems ............................................... 5-10
Table 5-8: Fault Evaluation.............................................................................. 5-11
Table 5-9: P-3900 Troubleshooting Guide....................................................... 5-17
Table 7-1: Top Level Assembly ......................................................................... 7-1
Table 7-2: Front Case Assembly ....................................................................... 7-2
Table 7-3: Rear Case Assembly........................................................................ 7-2
Table 7-4: Main Board Assembly....................................................................... 7-3
Table 7-5: Main PCB Jumper Configuration......................................................7-3
Table 7-5: P-3900 Printer...................................................................................7-4
Table 10-1: RS-232 Serial Interface Connections.............................................7-1
Table A-1:
Oxichip
Circuit Pin Descriptions.....................................................A-23
vi
SECTION 1: INTRODUCTION
1.1 Manual Overview
1.2 Warnings, Cautions, and Notes
1.3 NPB-3900 Patient Monitor Description
1.4 P-3900 Introduction
1.5 Related Documents
1.1 MANUAL OVERVIEW
This manual contains information for servicing the NPB-3900 series of patient
monitors. Only qualified service personnel should service this product. Before
servicing the NPB-3900, read the operator’s manual carefully for a thorough
understanding of operation.
1.2 WARNINGS, CAUTIONS, AND NOTES
This manual uses three terms that are important for proper operation of the
monitor: Warning, Caution, and Note.
1.2.1 Warning
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.
1.2.2 Caution
A caution precedes an action that may result in damage to, or malfunction of, the
monitor. Cautions are highlighted in boldface type.
1.2.3 Note
A note gives information that requires special attention.
1.3 NPB-3900 PATIENT MONITOR DESCRIPTION
The purpose and function of the NPB-3900 series of patient monitors is to
monitor: ECG; heart rate; noninvasive blood pressure (systolic, diastolic, and
mean arterial pressures); functional arterial oxygen saturation; and temperature
for adult and pediatric patients in all hospital areas and hospital-type facilities.
They may be used during hospital transport and in mobile, land-based
environments, such as ambulances.
Refer to the NPB-3900 operator’s manual for a description of the NPB-3900
controls, indicators, and operation. The physical and operational characteristics
of the monitors are described in the operator’s manual and Section 9,
Specifications, of this manual.
The parameter measurements for each model in the NPB-3900 series are
indicated in Table 1-1.
1-1
Section 1: Introduction
Model Parameter
NPB-3910 X X
NPB-3920 X X X
NPB-3930 X X X
NBP-3940 X X X X
1.4 P-3900 INTRODUCTION
The P-3900 is an optional, standalone printer designed for use with the
NPB-3900 patient monitor. The P-3900 communicates with the monitor using a
null-modem cable connected between each device’s RS-232 connector. The
P-3900 contains an internal battery, which, when fully charged, will operate the
printer for 3 hours (typical, at 25°C, producing fifteen 20-second printouts per
hour). The P-3900 can be connected to AC power using an external power
supply. The P-3900 uses the same type power supply as the NPB-3900 monitor,
the PS-120V or PS-240V.
Table 1-1: Model Configuration
NIBP SpO2 TEMP ECG
The P-3900 does not have an On/Off switch. The printer can sense when it has
an established communications link with the monitor. At that time, the green
LINKED indicator on the front panel lights, indicating that the printer is ready
for operation. See the NPB-3900 operator’s manual for more information
regarding use of the printer.
1.5 RELATED DOCUMENTS
To perform test and troubleshooting procedures and to understand the principles
of operation and circuit analysis sections of this manual, you must know how to
operate the monitor. Refer to the NPB-3900 operator’s manual. To understand
the various Nellcor Puritan Bennett sensors, ECG leads, blood pressure cuffs,
and temperature probes that work with the monitor, refer to the operator’s
manual and individual directions for use that accompany these accessories.
1-2
SECTION 2: ROUTINE MAINTENANCE
2.1 Cleaning
2.2 Periodic Safety and Functional Checks
2.3 Battery
2.4 Environmental Protection
2.1 CLEANING
WARNING: Do not spray, pour, or spill liquid on the NBP-3900, its
accessories, connectors, switches, or openings in the chassis. Do not immerse
the NPB-3900 or its accessories in liquid or clean with caustic or abrasive
cleaners.
To clean the NPB-3900, 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 or switches. Do not allow any liquids to
penetrate connectors or openings in the instrument. For cables, sensors, and
cuffs, follow the cleaning instructions in the directions for use that accompany
these accessories.
2.2 PERIODIC SAFETY AND FUNCTIONAL CHECKS
Nellcor Puritan Bennett recommends that the following checks be performed at
least every 2 years by a qualified service technician.
1. Inspect the exterior of the NPB-3900 for damage.
2. Inspect 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.
2.3 BATTERY
If the NPB-3900 has not been used for a long period of time, the battery will
need charging. To charge the battery, connect the NPB-3900 to an AC source as
described in the Setup & Use section of the operator’s manual.
NOTE: Storing the NBP-3900 for a long period without charging the battery
may degrade the battery capacity. A complete battery recharge when
not using the monitor requires 8 hours. The battery may be recharged
while the monitor is in use; in which case, the battery will require 14
hours to be recharged. The battery may require a full charge/discharge
cycle to restore normal capacity.
2-1
Nellcor Puritan Bennett recommends that the NPB-3900’s sealed, lead-acid
battery be replaced at 2-year intervals. Refer to Section 6, Disassembly Guide.
2.4 ENVIRONMENTAL PROTECTION
Follow local governing ordinances and recycling plans regarding disposal or
recycling batteries and other device components.
Section 3: Performance Verification
2-3
SECTION 3: PERFORMANCE VERIFICATION
3.1 Introduction
3.2 Equipment Needed
3.3 Performance Tests
3.4 Safety Tests
3.1 INTRODUCTION
This section discusses the tests used to verify performance following repairs or
during routine maintenance. All tests can be performed without removing the
NPB-3900 covers.
If the NPB-3900 fails to perform as specified in any test, repairs must correct the
problem before the monitor is returned to the user.
3.2 EQUIPMENT NEEDED
Table 3-1 lists the equipment required for performance verification.
Table 3-1: Required Test Equipment
Equipment Description
Digital multimeter (DMM) Fluke Model 87 or equivalent
Sensor extension cable EC-8
Durasensor® finger clip sensor
Oxisensor® II adhesive sensor
DS-100A
D-25
ECG cable CE-10
ECG electrodes Standard
ECG leads LE series
NIBP hose SHBP-10
NIBP cuff SCBP series
Temperature probe Welch Allyn SureTemp® (blue capped
probe)
Pulse oximeter tester Nellcor Puritan Bennett SRC-2
ECG simulator Dynatech Nevada medSim 300 or
equivalent
NIBP simulator Bio-Tek “BP Pump” or equivalent
Thermometer Calibrator Key Welch Allyn Model 767
Safety analyzer Bio-Tek 601 Pro or equivalent
Stopwatch Manual or electronic
3-1
Section 3: Performance Verification
3.3 PERFORMANCE TESTS
The battery charge and battery performance tests should be performed before
monitor repairs whenever the battery is suspected as being a source of a problem.
All other tests should be performed following monitor repairs. Before
performing the battery performance test, ensure that the battery is fully charged
(paragraph 3.3.1).
This section is written using Nellcor Puritan Bennett factory-set power-up
defaults. If your institution has reconfigured custom defaults, those values will
be displayed.
3.3.1 Battery Charge
Perform the following procedure to fully charge the battery.
1. Connect the monitor to an AC power source using the PS-120 or PS-240
external power supply and power cord, if needed.
2. Verify that the EXTERNAL POWER indicator is lit.
3. Charge the battery for at least 8 hours. The battery may require a complete
charge/discharge cycle to restore its normal capacity.
4. To check for a full charge, perform the procedure in paragraph 3.3.2
“Battery Performance Test.”
3.3.2 Battery Performance Test
The monitor is specified to operate typically on battery power for a minimum of
4 hours, at 25°C, with one NIBP measurement every 15 minutes. Before
performing this test, ensure that the battery is fully charged (paragraph 3.3.1).
1. Connect the Nellcor Puritan Bennett SRC-2 pulse oximeter tester to the
monitor via the EC-8 sensor cable. Connect the NIBP simulator to the
monitor via the SHBP-10 hose.
2. Set the SRC-2 switches as follows:
SWITCH
POSITION
RATE 38
LIGHT LOW
MODULATION LOW
RCAL/MODE RCAL 63/LOCAL
3- 2
3. Set the NIBP simulator to simulate a pressure setting of 120/80 mmHg
and heart rate of 80 bpm.
4. Ensure that the monitor is not connected to AC power.
Section 3: Performance Verification
5. With the NPB-3900 turned off, press the ON/STANDBY button and
verify that the battery icon appears at the bottom of the display after the
power-on self-test is completed. The boxes in the battery icon should all
be filled, indicating the battery is charged.
6. Verify that the monitor is responding to the SpO2 simulator signal and
that the audible alarm is sounding. Use the knob to select the SpO
2
Menu and permanently silence the SpO2 audible alarm.
7. Use the knob to select the NIBP Menu and set the Automatic
Measurement Interval to 15 minutes. Exit the menu and press the front
panel NIBP button to manually initiate the first NIBP measurement.
Subsequent NIBP measurements will be taken automatically every 15
minutes.
8. The monitor must operate for at least 4 hours before the monitor
automatically powers down due to low battery condition.
9. Verify that the low battery alarm occurs 15-30 minutes before the battery
fully discharges.
10. Allow the monitor to operate until it automatically powers down due to
low battery condition. Verify that an audible alarm sounds when the
monitor automatically shuts down. Press the alarm silence button to
terminate this audible alarm.
11. If the monitor passes this test, immediately recharge the battery
3.3.3 Power-On Self-Test
1. Connect the monitor to an AC power source using the PS-120 or PS-240
2. Do not connect any input cables to the monitor.
3. Observe the monitor front panel. With the monitor off, press the
(paragraph 3.3.1, steps 1–3).
power supply and power cord, and verify that the EXTERNAL POWER
indicator is lit.
ON/STANDBY button. The monitor must perform the following sequence.
a. The monitor emits a beep.
b. A few seconds later, the display backlight illuminates, but the display
is blank.
c. The Nellcor Puritan Bennett logo then appears for a few seconds,
with the version numbers of the boot and operational software
displayed in the lower left corner of the display. (The upper version
number corresponds to the boot software, the lower version number
corresponds to the operational software.)
d. A beep signals the end of the power-on self-test. The power-on self-
test takes approximately 10 seconds to complete.
e. Upon successful completion of the power-on self-test, the display will
be in the normal monitoring screen configuration. No vital-sign
numeric values or trend values will be displayed.
3-3
Section 3: Performance Verification
3.3.4 Hardware and Software Tests
Hardware and software testing includes the following tests applicable to the
indicated models in the series.
• 3.3.4.1 SpO
• 3.3.4.2 Operation with an ECG Simulator — NPB-3930, NPB-3940
• 3.3.4.3 Verification of Pneumatic System — NPB-3900
• 3.3.4.4 Operation with a Temperature Simulator — NPB-3920, NPB-3940
• 3.3.4.5 General Operation — NPB-3900
3.3.4.1 SpO
2 Testing (NPB-3900)
2 testing includes the following tests.
SpO
• 3.3.4.1.1 Alarms and Alarm Silence
• 3.3.4.1.2 Heart Rate Tone Volume Control
• 3.3.4.1.3 Dynamic Operating Range
• 3.3.4.1.4 LED Excitation Test
3.3.4.1.1 Alarms and Alarm Silence
1. Connect the SRC-2 pulse oximeter tester to the EC-8 sensor extension cable
and connect the cable to the monitor. Set the SRC-2 as follows:
2 Testing NPB-3900
SWITCH
POSITION
RATE 38
LIGHT LOW
MODULATION OFF
RCAL/MODE RCAL 63/LOCAL
2. Press the ON/STANDBY button to turn the monitor on. After the normal
power-up sequence, verify that the SpO
2% display initially indicates zero
or is blank.
NOTE: The pulse bar may occasionally indicate a step change as the monitor is
in the pulse search mode.
3. Move the modulation switch on the SRC-2 to LOW.
4. Verify the following monitor reaction:
a. The pulse bar begins to track the artificial pulse signal from the SRC-2.
b. Initially, zero is displayed in the SpO
2 frame, or it is blank.
c. After about 10 to 20 seconds, the monitor displays saturation and heart
rate as specified by the tester. Verify that the values are within the
following tolerances:
Oxygen Saturation Range 79% to 83%
Heart Rate Range 35 to 41 bpm
3- 4
Section 3: Performance Verification
d. The audible alarm sounds and both the SpO2% and HEART RATE
displays flash, indicating both parameters have violated the default
alarm limits.
e. The heart rate tone is heard. (Heart rate tone source, found in the
Heart Rate Menu, should be set to “SpO2”.)
5. Press the ALARM SILENCE button on the front panel of the monitor. The
audible alarm is temporarily silenced.
6. Verify the following:
a. The audible alarm remains silenced.
b. The “slashed bell” icon appears in each numeric frame on the display.
c. The SpO
d. The heart rate tone remains audible.
e. The audible alarm returns in approximately
60 seconds.
3.3.4.1.2 Heart Rate Tone Volume Control
Connect the SRC-2 pulse oximeter tester to the EC-8 sensor extension cable and
connect the cable to the monitor. Set the SRC-2 as follows:
SWITCH
RATE 38
LIGHT LOW
MODULATION LOW
RCAL/MODE RCAL 63/LOCAL
1. Power on the monitor and verify that the SpO2 and heart rate values are
correctly displayed. Press the ALARM SILENCE button on the front panel
of the monitor to temporarily silence the audible alarm.
2. Verify that the heart rate tone source, found in the Heart Rate Menu, is set
to “SpO
2”. Press the VOLUME button on the front panel of the monitor.
Within 3 seconds of having pressed the button, rotate the knob CW and
verify that the beeping heart rate tone sound level increases.
2% and HEART RATE displays continue flashing.
POSITION
3. Rotate the knob CCW and verify that the beeping heart rate tone decreases
until it is no longer audible. Rotate the knob CW to return the beep volume
to a comfortable level. (Note that 3 seconds after the last button-press or
rotation of the knob, function of the knob reverts to moving the highlight
on the display screen.)
3-5
Section 3: Performance Verification
3.3.4.1.3 Dynamic Operating Range
The following test sequence verifies proper monitor operation over a range of
input signals.
1. Connect the SRC-2 to the NPB-3900 (using an EC-8) and turn the
NPB-3900 on.
2. Place the SRC-2 in the RCAL 63/LOCAL mode.
3. Set the SRC-2 as indicated in Table 3-2. Verify that the NPB-3900
readings are within the indicated tolerances. Allow the monitor several
seconds to stabilize the readings.
NOTE: A “*” indicates values that produce an alarm. Press the ALARM
SILENCE button to temporarily silence the audible alarm.
Table 3-2: SRC Settings and NBP-3900 Indications
RATE LIGHT MODULATION SpO2 Pulse Rate
38 HIGH2 LOW 79 - 83* 35 - 41*
112 HIGH1 HIGH 79 - 83* 109 - 115
201 LOW LOW 79 - 83* 195 - 207*
201 LOW HIGH 79 - 83* 195 - 207*
SRC-2 Settings NPB-3900 Indications
NOTE: For the pulse rate setting of 201 bpm, the pulse rate tolerance of 195 to
4. Turn the monitor off.
3.3.4.1.4 LED Excitation Test
This procedure uses normal system components to test circuit operation. A
Nellcor Puritan Bennett Oxisensor II adhesive sensor, model D-25, is used to
examine LED intensity control. The red LED is used to verify intensity
modulation caused by the LED intensity control circuit.
1. Connect an EC-8 sensor extension cable to the monitor.
2. Connect a D-25 sensor to the sensor extension cable.
3. Press the ON/STANDBY button to turn the monitor on.
4. Leave the sensor open with the LED and photodetector visible.
5. After the monitor completes its normal power-up sequence, verify that the
207 bpm is greater than the ±3 bpm accuracy specification of the
monitor, due to the performance characteristics of the SRC-2 tester.
sensor LED is brightly lit.
3- 6
6. 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.
7. Open the sensor and notice that the LED intensity increases.
8. Repeat step 6 and the intensity again decreases. This variation is an
indication that the microprocessor is in proper control of LED intensity.
9. Turn the NPB-3900 off.
3.3.4.2 Operation with an ECG Simulator (NPB-3930, NPB-3940)
1. With the monitor off, connect the ECG leads to the appropriate jacks on
the ECG tester.
2. Connect the leads to the CE-10 ECG cable. Connect the CE-10 to the ECG
input port on the NPB-3900. Set the ECG tester as follows:
Heart rate: 30 bpm
Amplitude: 1 millivolt
Lead select: II
Section 3: Performance Verification
Normal sinus rhythm
Adult mode
NOTE: The accuracy of the monitor’s ECG measurements is ±5 bpm. In the
procedure below, add the tolerance of the simulator to the acceptable
range of readings.
3. Press the ON/STANDBY button to turn the monitor on. After the normal
power-up sequence, verify the following monitor reactions:
a. After at least five heartbeats, the monitor displays a heart rate of
30 ±5 bpm.
b. The audible alarm sounds and the HEART RATE display flashes,
indicating the heart rate is below the default lower alarm limit.
4. Press the ALARM SILENCE button. Verify that the audible alarm is
silenced.
5. Increase the heart rate setting on the ECG simulator to 240 bpm.
6. After at least five heartbeats, verify that the monitor displays a heart rate
of 240 ±5 bpm.
7. Verify that the audible alarm sounds and the HEART RATE display
flashes, indicating that the heart rate is above the default upper alarm limit.
8. Press the ALARM SILENCE button to silence the alarm.
3-7
Section 3: Performance Verification
9. Decrease the heart rate setting on the ECG simulator to 120 bpm.
10. After at least five heartbeats, verify that the monitor displays a heart rate
of 120 ±5 bpm.
11. Disconnect the LL lead from the ECG simulator. Verify that the “Leads
Off” alarm message appears, three dashes are displayed in the HEART
RATE display, and a low priority audible alarm sounds.
12. Reconnect the LL lead to the ECG simulator. Verify that the “Leads Off”
alarm message no longer appears and that the audible alarm is silenced.
13. Repeat steps 11 and 12 for the LA and RA leads.
14. Turn the monitor off.
3.3.4.3 Verification of Pneumatic System (NPB-3900)
Tests in paragraphs 3.3.4.3.1 through 3.3.4.3.5 verify the functionality of the
NPB-3900 pneumatic system. These tests were designed to use the Bio-Tek “BP
Pump” noninvasive blood pressure simulator. The internal test volume of the
Bio-Tek simulator is 250 cm
3
, which is used to calculated the inflation/deflation
rate periods. The Bio-Tek simulator, or any equivalent NIBP simulator, is
required to perform these tests.
The NPB-3900 must be placed in Diagnostic Mode, with the NIBP Test screen
active for each of the NIBP tests. For a detailed explanation of the Diagnostic
Mode, refer to Section 4, Power-up Defaults Menu and Diagnostic Mode.
Each of the tests described in paragraphs 3.3.4.3.1 through 3.3.4.3.5 must be
performed to verify pneumatic system functionality. These tests can be
performed individually (in any order) or sequentially. Prior to performing any of
these tests, perform the following setup procedure. If these tests are performed in
sequence, this procedure needs to be performed once prior to the first test.
1. Turn on the Bio-Tek simulator and press the MODE button to place the
simulator in test mode. The simulator screen will indicate “Internal Cuff”
and “Pressure Gauge”.
2. Connect the simulator hose to the NIBP connector on the NPB-3900.
3. Follow the procedure described in Section 4 to place the NPB-3900 in
Diagnostic Mode with the NIBP Test screen active.
3.3.4.3.1 Pressure Transducer Accuracy
The pressure transducer accuracy test verifies the pressure accuracy of the
NBP-3900 pressure transducer.
3- 8
Section 3: Performance Verification
1. Confirm that the Bio-Tek simulator is in test mode. The simulator should
display “Pressure Gauge”. Confirm that the simulator is set up for the
internal cuff.
2. Confirm that the NIBP Test screen is active on the NPB-3900. Press, then
release, the SPEAKER button on the NPB-3900 to verify that the valve is
closed.
3. Press the CONTRAST button on the NPB-3900, then the ZERO button on
the simulator, to perform an offset adjustment so that the simulator and
NBP-3900 both display a pressure of 0 mmHg.
4. Press the SELECT button on the simulator until the simulator displays
“Pressure Source Set Test Pressure”. Use the UP/DOWN buttons on the
simulator to adjust for 250 mmHg.
5. Press the START PUMP button on the simulator. The simulator will begin
to pressurize. The current pressure in mmHg is displayed on both the
simulator and NPB-3900 displays.
6. Allow 15-20 seconds for the pressure to stabilize. The pressure displayed
on the NPB-3900 and the simulator should be within 5 mmHg of one
another to complete the test successfully.
7. Press the STOP PUMP button on the simulator to stop the test.
8. Press and hold the SPEAKER button until the NPB-3900 displays a
9. Additional NIBP tests may be performed at this time. If no further NIBP
3.3.4.3.2 Pneumatic Leakage
The pneumatic leakage test verifies the integrity of the pneumatic system. A
timer/stopwatch is required for this test.
1. Ensure that the Bio-Tek simulator is in test mode. The simulator should
2. Ensure that the NIBP Test screen is active on the NPB-3900. Press, then
3. Press the CONTRAST button on the NPB-3900, then the ZERO button on
pressure of 0 mmHg.
tests are to be conducted, turn the NPB-3900 off. Normal monitoring
operation will return the next time the monitor is turned on.
display “Pressure Gauge”. Confirm that the simulator is set up for the
internal cuff.
release, the SPEAKER button on the NPB-3900 to verify that the valve is
closed.
the simulator, to perform an offset adjustment so that the simulator and
NBP-3900 both display a pressure of 0 mmHg.
3-9
Section 3: Performance Verification
4. Press the NIBP button on the NPB-3900 to activate the pump. Hold the
5. Press and hold the SPEAKER button until the NPB-3900 displays a
6. Additional NIBP tests may be performed at this time. If no further NIBP
3.3.4.3.3 Inflation Rate
The inflation rate test verifies the inflation rate of the NPB-3900. A
timer/stopwatch is required for this test.
1. Ensure that the Bio-Tek simulator is in test mode. The simulator should
button until the NPB-3900 displays a pressure of approximately 250 mmHg.
Allow 15-20 seconds for the pressure to stabilize. Record the pressure
displayed on the monitor, and initiate a 1-minute timer. After 1 minute,
again record the pressure displayed. The test is successfully completed if
the pressure has dropped by 6 mmHg, or less, during the 1-minute period.
pressure of 0 mmHg.
tests are to be conducted, turn the NPB-3900 off. Normal monitoring
operation will return the next time the monitor is turned on.
display “Pressure Gauge”. Confirm that the simulator is set up for the
internal cuff.
3.3.4.3.4 Deflation Rate
2. Ensure that the NIBP Test screen is active on the NPB-3900. Press, then
release, the SPEAKER button on the NPB-3900 to verify that the valve is
closed.
3. Press the CONTRAST button on the NPB-3900, then the ZERO button on
the simulator, to perform an offset adjustment so that the simulator and
NBP-3900 both display a pressure of 0 mmHg.
4. Press the NIBP button on the NPB-3900 to activate the pump, and
simultaneously start the timer. Hold the NIBP button until the monitor
displays a pressure of 280 mmHg. When a pressure of 280 mmHg is
reached, stop the timer. The test is successfully completed if the inflation
time is between 1 and 6 seconds.
5. Press and hold the SPEAKER button until the NPB-3900 displays a
pressure of 0 mmHg.
6. Additional NIBP tests may be performed at this time. If no further NIBP
tests are to be conducted, turn the NPB-3900 off. Normal monitoring
operation will return the next time the monitor is turned on.
The deflation rate test verifies the deflation rate of the NPB-3900. A timer/stop
watch is required for this test.
3- 10
1. Ensure that the Bio-Tek simulator is in test mode. The simulator should
display “Pressure Gauge”. Confirm that the simulator is set up for the
internal cuff.
Section 3: Performance Verification
2. Ensure that the NIBP Test screen is active on the NPB-3900. Press, then
release, the SPEAKER button to verify that the valve is closed.
3. Press the CONTRAST button on the NPB-3900, then the ZERO button on
the simulator, to perform an offset adjustment so that the simulator and
NBP-3900 both display a pressure of 0 mmHg.
4. Press the NIBP button on the NPB-3900 to activate the pump. Hold the
button until the NPB-3900 displays a pressure of 280 mmHg. Initiate a
1-minute timer, and simultaneously press and hold the ALARM SILENCE
button on the NPB-3900. This will cause the pneumatic system to deflate at
a rate of 3 mmHg/sec ±1.5 mmHg/sec. After 1 minute, record the pressure
displayed on the NPB-3900. The test is successfully completed if the
monitor displays a pressure reading of 10 mmHg to 190 mmHg.
5. Press and hold the SPEAKER button until the NPB-3900 displays a
pressure of 0 mmHg.
6. Additional NIBP tests may be performed at this time. If no further NIBP
tests are to be conducted, turn the NPB-3900 off. Normal monitoring
operation will return the next time the monitor is turned on.
3.3.4.3.5 Over-pressure
The over-pressure test verifies the functionality of the over-pressure relief
system of the NPB-3900.
1. Ensure that the Bio-Tek simulator is in test mode. The simulator should
display “Pressure Gauge”. Confirm that the simulator is set up for the
internal cuff.
2. Ensure that the NIBP Test screen is active on the NPB-3900. Press, then
release, the SPEAKER button on the NPB-3900 to verify that the valve is
closed.
3. Press the CONTRAST button on the NPB-3900, then the ZERO button on
the simulator, to perform an offset adjustment so that the simulator and
NBP-3900 both display a pressure of 0 mmHg.
4. Press the SELECT button on the simulator until the simulator displays
“Overpressure Test”. Press the START TEST button on the simulator. The
simulator will pressurize the system until the monitor’s over-pressure relief
system activates, including the warning display screen. The simulator will
display the pressure value that caused the NPB-3900 over-pressure relief
system to activate. The test is successfully completed if the simulator
displays a pressure reading of 280 mmHg to 330 mmHg.
5. Press and hold the SPEAKER button to ensure that the NPB-3900 displays a
pressure of 0 mmHg.
6. Additional NIBP tests may be performed at this time. If no further NIBP
tests are to be conducted, turn the NPB-3900 off. Normal monitoring
operation will return the next time the monitor is turned on.
3-11
Section 3: Performance Verification
3.3.4.4 Operation with a Thermometer Calibration Key (Models 3920 and 3940)
1. Remove the probe from its holder.
2. Insert the calibration key in the temperature input port
3. Press the ON/STANDBY button to turn the monitor on. After the normal
power-up sequence, verify that the temperature reads 36.3 ±0.1 °C (or 97.3
±0.2 °F).
4. Turn the monitor off.
3.3.4.5 General Operation
The following tests provide an overall performance check of the system:
• 3.3.4.4.1 Operation with a Human Subject
• 3.3.4.4.2 Serial Interface Test
• 3.3.4.4.3 Printer Verification
3.3.4.5.1 Operation with a Human Subject
Patient monitoring involves connecting the monitor to a human subject for a
qualitative test.
1. Connect an EC-8 sensor extension cable to the monitor. Connect a
Nellcor Puritan Bennett Durasensor finger clip sensor, model DS-100A,
to the sensor extension cable. Clip the DS-100A to the subject as
described in the sensor directions for use.
T
on the NPB-3900.
2. Connect a CE-10 ECG cable to the NPB-3930 or NPB-3940. Connect
ECG leads to the cable. Connect ECG electrodes to the leads. Apply ECG
electrodes to the subject according to the lead’s and electrodes’ directions
for use.
3. Connect an SHBP-10 blood pressure hose to the monitor. Apply the
appropriate SCBP series blood pressure cuff to the subject according to
the cuff directions for use.
4. Connect a blue-capped SureTemp oral thermometer probe to the
NPB-3920 or NPB-3940. Place the probe in its holder in the module on
the rear of the monitor.
5. Press the ON/STANDBY button to turn the monitor on and verify that
the monitor is operating.
6. The monitor should stabilize on the subject’s physiological signals in
about 15 to 30 seconds. Verify that the saturation and heart rate are
reasonable for the subject.
7. Press the NIBP button on the front panel of the monitor. Verify that the
blood pressure values are reasonable for the subject.
3- 12
8. Remove the temperature probe from its holder. Following the directions
3.3.4.5.2 Serial Interface Test
Perform the following procedure to test the serial port voltages. The test is
RS-232
qualitative and only verifies that the serial interface port is powered correctly,
and that the “nurse call” signal is operational. The serial connector is a male
DB-9 located on the monitor’s rear panel, identified with the RS-232 symbol.
1. Turn the monitor ON.
2. Set up the DMM with the function set to “VDC” at a range of 10 volts.
3. Connect the DMM negative lead to connector pin 5 (GND), or the shell of
4. Connect the DMM positive lead to the following pins, in turn, and verify
Section 3: Performance Verification
in the NPB-32900 operator’s manual, apply a new probe cover and take
the subject’s temperature. Verify that the temperature measurement is
reasonable for the subject.
the RS-232 connector.
the voltage values listed in Table 3-3. (Voltage for pin 9 is that listed for the
“no alarm” condition.)
Table 3-3: Serial Interface Measurements
Measurement (V)
Pin Signal Min Typical Max
1 not used -0.4 0.0 0.4
2 RXD <<< -0.4 0.0 0.4
3 TXD >>> -5.0 -9.0 -15.0
4 DTR >>> -5.0 -9.0 -15.0
5 GND -0.4 0.0 0.4
6 DSR <<< -0.4 0.0 0.4
7 RTS >>> -5.0 -9.0 -15.0
8 CTS <<< -0.4 0.0 0.4
9 Alarm Out >>>
(no alarm) -5.0 -9.0 -15.0
9 Alarm Out >>>
(alarm underway) 5.0 9.0 15.0
5. Connect the Nellcor Puritan Bennett SRC-2 pulse oximeter tester to the
monitor via the EC-8 sensor extension cable.
3-13
Section 3: Performance Verification
6. Set the SRC-2 switches as follows:
SWITCH
RATE 38
LIGHT LOW
MODULATION LOW
RCAL/MODE RCAL 63/LOCAL
7. Verify that the monitor is responding to the SpO2 simulator signal and the
audible alarm is sounding. If desired, press the ALARM SILENCE button
to temporarily silence the audible alarm.
8. Connect the DMM positive lead to pin 9 and verify the voltage value listed
in Table 3-3. (Voltage for pin 9 is that listed for the “alarm underway”
condition.)
3.3.4.5.3 Printer Verification (For Optional Printer)
Printer verification consists of connecting the printer to the monitor and the
monitor to a human subject for a qualitative test.
1. Connect the output of the appropriate power supply, PS-240V or PS-120V,
to the labeled connector in the rear of the printer. When the printer’s external
15V - 1A
power supply is connected, the printer front-panel charging LED is lighted.
POSITION
RS-232
2. Connect the serial cable between the labeled connectors in the rear panels of
the monitor and the printer.
3. The printer front-panel communication LED is lighted when the RS-232
communications link is completed.
4. Rotate the monitor knob to highlight the setup icon . Press the knob and
ensure Communications Selection is (Printer).
5. Connect an EC-8 sensor extension cable to the monitor. Connect a Nellcor
Puritan Bennett Durasensor oxygen transducer, model DS-100A, to the
sensor extension cable. Attach the DS-100A to the subject as described in
the sensor directions for use.
6. Press the ON/STANDBY button to turn the monitor on and verify that the
monitor is operating.
7. The monitor should stabilize on the subject’s physiological signal in about
15 to 30 seconds. Verify that the saturation and heart rate is reasonable for
the subject.
3- 14
8. Press the printer CONTINUOUS BUTTON. Verify that the printout contains
vital signs across the top of the paper, and that aSpO
marks, occupies the center portion of the paper. Press the CONTINUOUS
BUTTON again to terminate printout.
9. Disconnect the sensor and shut off the monitor.
3.4 SAFETY TESTS
NPB-3900 safety tests consist of the following Leakage Currents elements,
performed in accordance with IEC 601-1.
3.4.1 Protective Ground Continuity
NOTE: The NPB-3900 does not require an isolated Earth Ground terminal,
neither is one installed. No Protective Ground Continuity check is
required.
3.4.2 Electrical Leakage
NPB-3900 leakage current tests consist of the following elements, performed in
accordance with IEC 601-1, clause 19:
Section 3: Performance Verification
2 waveform, with grid
• Patient Leakage Current
• Patient Leakage Current, with Mains Voltage on the Applied Part
3.4.2.1 Patient Leakage Current
This test measures patient leakage current in accordance with IEC 601-1, clause
19, for Class II, type CF equipment. Patient leakage current in this test is
measured from any individual patient connection to earth (power ground).
NOTE: This test requires a test cable for each patient connector. For example,
the ECG test cable consists of the ECG cable connector, with all the
conductors shorted together, connected to a test lead from the electrical
safety analyzer. Test cables for SpO
in a similar manner.
1. Configure the electrical safety analyzer as recommended by the analyzer
operating instructions.
2. Connect the appropriate external power supply input power cord to the
analyzer as recommended by the analyzer operating instructions. Connect
the external power supply output cord to the monitor.
3. Connect the ECG test cable to the ECG connector on the NPB-3930 /3940
and the appropriate input connector on the analyzer. Turn on the
NPB-3930/3940.
2 and temperature can be configured
4. Perform the test as recommended by the analyzer operating instructions.
Patient leakage current is measured under various conditions of the AC
mains. For each condition, the measured leakage current must not exceed
that indicated in Table 3-4.
3-15
Section 3: Performance Verification
5. Repeat the test for the SpO2 and temperature patient connections, using the
appropriate test cables.
Table 3-4: Current Test
Allowable Leakage
Test Condition
Current (milliamps)
Normal polarity 0.01
Normal polarity; Neutral (L2) open 0.05
Reverse polarity 0.01
Reverse polarity; Neutral (L2) open 0.05
3.4.1.3 Patient Leakage Current, with Mains Voltage on the Applied Part
This test measures patient leakage current in accordance with IEC 601-1, clause
19, for Class II, type CF equipment. In this test, 110% of mains voltage is
applied between each patient connection and earth (power ground). Patient
leakage current is then measured from any individual patient connection to earth.
NOTE: This test requires the same test cables for each patient connector as
described in section 3.4.1.2.
WARNING: AC mains voltage will be present on the applied part
terminals during this test. Exercise caution to avoid electrical shock hazard.
1. Configure the electrical safety analyzer as recommended by the analyzer
operating instructions.
2. Connect the monitor’s appropriate external power supply input power cord
to the analyzer as recommended by the analyzer operating instructions.
Connect the external power supply output cord to the monitor.
3. Connect the ECG test cable to the ECG connector on the NPB-3930/3940
and the appropriate input connector on the analyzer. Turn on the
NPB-3930/3940.
4. Perform the test as recommended by the analyzer operating instructions.
Patient leakage current is measured with normal and reverse mains polarity.
For each condition, the measured leakage current must not exceed that
indicated in Table 3-5.
5. Repeat the test for the SpO2 and temperature patient connections, using the
appropriate test cables.
Table 3-5: Leakage Current
Allowable Leakage
Test Condition
Current (milliamps)
Normal polarity 0.05
Reverse polarity 0.05
3- 16
SECTION 4: POWER-UP DEFAULTS MENU AND DIAGNOSTIC MODE
4.1 Introduction
4.2 Power-up Defaults Menu
4.3 Restoring Factory Settings
4.4 Diagnostic Mode
4.1 INTRODUCTION
This section discusses use of the Power-up Defaults Menu to configure power-on
default settings, and the Diagnostic Mode to obtain service-related information
about the monitor.
4.2 POWER-UP DEFAULTS MENU
The purpose of the Power-up Defaults Menu (Table 4-1) is to allow the
authorized user to create a “power-up default” for each setting in the NPB-3900.
Power-up defaults are the settings in effect each time the NPB-3900 is powered
on. Once the Power-up Defaults Menu is entered, physiological monitoring is
terminated. The screen layouts do NOT display any information associated with
normal monitoring operation.
Use the following procedure to configure the power-up default settings for the
NPB-3900 monitor.
1. While in normal monitoring mode, adjust each accessible setting on the
monitor as desired, using the techniques described in the operator’s manual.
Such settings include alarm limits, choice of display type for the graphic
frame, and ECG lead select.
2. Use the knob to invoke the Set-up Menu (choose the screwdriver icon found
along the bottom of the display).
3. Select the menu item “Enter Power-Up Defaults Menu”. Once selected, a
pop-up box appears with the text “Enter 3-Digit Passcode”. Use the knob to
enter the passcode, 2 1 5. This passcode is set at the factory and may not be
changed.
4. The Power-up Defaults Menu is now present. The available menu items are
explained in the table that follows. Make changes to these menu items as
desired.
Table 4-1: Power-Up Defaults Menu
MENU ITEM* CHOICES** EXPLANATION
Accept Current
Settings?
“Yes”
“No”
If “Yes” is chosen, the current
NPB-3900 settings become the
power-up defaults.
4-1
Section 4: Power-up Defaults Menu and Diagnostic Mode
Table 4-1: Power-Up Defaults Menu - (Continued)
MENU ITEM* CHOICES** EXPLANATION
Permanent Audible
“Make Available”
Alarm Silence
“Deny Access”
Alarm Suspend “Make Available”
“Deny Access”
Auto-Set Limits
“Make Available”
“Deny Access”
If “Make Available” is chosen,
the caregiver may permanently
silence the audible alarm for a
particular parameter via the
Alarm/Limits Menu. Some
institutions may wish to prevent
audible alarms from being
permanently silenced. If so,
“Deny Access” should be
selected.
If “Make Available” is chosen,
the caregiver may invoke the
Alarm Suspend Mode by
pressing and holding the Alarm
Silence button for 2 seconds.
Some institutions may wish to
prevent Alarm Suspend from
being invoked. If so, “Deny
Access” should be selected.
If “Make Available” is chosen,
the caregiver may invoke the
Auto-Set Limits function via
the Alarm/Limits Menu. Some
institutions may wish to prevent
Auto-Set Limits from being
invoked. If so, “Deny Access”
should be selected.
4-2
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