Nellcor N-65 User manual
N-65
Nellcor Puritan Bennett Incorporated is an affiliate of Tyco Healthcare. Nellcor, Oxiband, Durasensor,
OxiCliq, Dura-Y, MAX-FAST, and O
XIMAX are trademarks of Nellcor Puritan Bennett Incorporated or an
affiliate.
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: 4,802,486; 4,869,254; 4,928,692;
4,934,372; 4,960,126; 5,078,136; 5,485,847; 5,743,263; 5,865,736; 6,035,223; 6,298,252; 6,463,310; 6,591,123;
6,675,031; 6,708,049; 6,801,797; and Re.35,122.
Contents
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1
Warnings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1
Cautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2
Notes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2
Manual Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3
Description of OXIMAX N-65 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
Front Panel Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
Front Panel Symbols . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8
Rear Panel Symbols . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8
Label Symbols . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9
Menu Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10
Set Menu Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11
Set Time/Date Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12
Related Documents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14
Routine Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15
Cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15
Periodic Safety Checks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15
Functional Checks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15
Battery Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16
Performance Verification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17
Equipment Needed . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17
Performance Tests . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17
Power-On-Self-Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17
Discussion . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17
Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18
Operational Setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .22
Setting the Time and Date . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .22
Discussion . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .22
Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .22
General Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .26
Operation with a Live Subject . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .26
Pulse Oximetry Functional Tests . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .28
Test Setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .31
Test 1: BPM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .32
Test 2: SpO2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .33
Test 3: Modulation Level . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .34
OXIMAX N-65 Service Manual i
Contents
Test 4: Light Level . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .36
Safety Tests . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .37
Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .39
How To Use This Section . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .39
Who Should Perform Repairs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .39
Troubleshooting Guide . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .39
Error Codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .42
Disassembly Guide . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .47
Tools Required . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .47
Replacement Level Supported . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .47
Prior to Disassembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .48
Separating the Front and Back Cases . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .48
SpO2 PCB or User Interface PCB Replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .50
Front Case Assembly Replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .54
Rear Case Assembly Replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .57
Battery Compartment Door Replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .59
Spare Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .61
Obtaining Replacement Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .61
Parts List and Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .61
Packing for Shipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .65
Returning the Monitor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .65
Repacking in Original Carton . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .65
Packing in a Different Carton . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .67
Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69
Performance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .69
Electrical . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .73
Environmental Conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .74
Physical Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .75
Compliance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .75
Manufacturer’s Declaration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .75
Technical Discussion . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 81
Oximetry Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .81
Functional versus Fractional Saturation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .82
Measured versus Calculated Saturation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .82
OXIMAX Technology . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .83
ii OXIMAX N-65 Service Manual
Contents
Block Diagram Theory . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .84
2 Printed Circuit Board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .85
SpO
Patient Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .85
Power Supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .85
Power Monitoring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .85
User Interface Printed Circuit Board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .85
Keypad . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .86
Backlight . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .86
CPU and Flash . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .86
Real-Time Clock . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .86
Audio . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .86
LCD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .87
IrDA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .87
Power Supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .87
Power Supply Monitoring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .87
Index . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .109
OXIMAX N-65 Service Manual iii
Contents
Blank Page
iv OXIMAX N-65 Service Manual
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 OXIMAX N-65
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 monitor.
WARNING: Explosion hazard. Do not use the OXIMAX N-65 in the presence
of flammable anesthetics mixed with air, oxygen, or nitrous oxide.
WARNING: Do not spray, pour, or spill any liquid on the OXIMAX N-65, its
accessories, connectors, switches, or openings in the enclosure as this may
damage the monitor.
WARNING: Chemicals from a broken LCD display panel are toxic when
ingested. Use caution when the OXIMAX N-65 has a broken display panel.
WARNING: The use of accessories, sensors, and cables other than those
specified may result in increased emission and/or create invalid readings of
the OXIMAX N-65.
WARNING: Do not silence the OXIMAX N-65 audible alarm or decrease its
volume if patient safety could be compromised.
WARNING: To ensure patient safety, do not place the monitor in any
position that might cause it to fall on the patient.
OXIMAX N-65 Service Manual 1
Introduction
Cautions
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 monitor to extreme moisture such as rain.
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 O
XIMAX N-65.
Notes
Caution: Observe ESD (electrostatic discharge) precautions when working
within the unit.
Caution: Observe ESD (electrostatic discharge) precautions when
disassembling and reassembling the O
XIMAX N-65 and when handling any of
the components of the monitor.
Caution: When reassembling the O
XIMAX N-65, 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.
Notes are identified by the Note symbol shown above.
Notes provide useful helpful information.
2 OXIMAX N-65 Service Manual
Manual Overview
Introduction
This manual contains information for service personnel who will service the
Nellcor model O
XIMAX N-65 handheld pulse oximeter, herein referred to as the
monitor. Only qualified service personnel should service this product. Read the
operator's manual carefully and thoroughly understand the operation of the
monitor.
OXIMAX N-65 Service Manual 3
Introduction
Description of OXIMAX N-65
The OXIMAX™ N-65 handheld pulse oximeter is indicated for continuous or spot
check monitoring of functional arterial oxygen saturation (SpO
adult, pediatric and neonatal patients in hospital, hospital-type facilities, transport
and mobile environments as well as in the homecare environment.
Front Panel Description
This section identifies the symbols, controls, displays, and indicators on the
XIMAX N-65.
O
2) and pulse rate of
Refer to the O
XIMAX N-65 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
4 OXIMAX N-65 Service Manual
5 — %SpO2 Lower Alarm Limit indicator
Introduction
6 — %SpO
2 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 — %SpO
2 Limit Changed indicator
OXIMAX N-65 Service Manual 5
Introduction
17 — Low Battery indicator
18 — Data In-Sensor indicator
19 — Alarm Volume Adjust indicator
20 — Pulse Beep Tone Volume Adjust indicator
21 — BPM Lower Alarm Limit indicator
22 — Print indicator
23 — Interference indicator
24 — Pulse Search indicator
25 — Data indicator
26 — Alarm Silenced indicator
6 OXIMAX N-65 Service Manual
27 — Power button
28 — Up Arrow button
29 — Backlight button
Introduction
30 — Menu button
31 — Data (Record/Print) button
32 — Down Arrow button
33 — Alarm Silence button
OXIMAX N-65 Service Manual 7
Introduction
Front Panel Symbols
The follow two symbols are located on the front panel of the monitor.
Displays the measured percent of oxygen saturation.
Displays the measured pulse beats per minute.
Rear Panel Symbols
The following symbols are located on the rear panel of the monitor.
See Instructions for Use
1 — Label
2 — Battery Cover
Type BF Applied Part - Not defibrillator proof
Resistant to liquid ingress
Prescription only
8 OXIMAX N-65 Service Manual
Label Symbols
Introduction
Date of Manufacture
European union approval
Canadian/USA certification mark (electrical safety)
Russian regulatory approval
Serial number
These symbols display on the monitor’s labels.
Keep away from heat
Temperature limitation
Protect from moisture
Fragile
Keep upright
Humidity limitation
OXIMAX N-65 Service Manual 9
Introduction
Menu Parameters
This section contains information on how to set monitor parameters and limits
using the menu structure.
See Set Menu Parameters on page 11 to set the following parameters:
• high and low SpO
2 limits
• high and low BPM limits
• alarm volume
• pulse beep volume
• data printing
See Set Time/Date Parameters on page 12 to set the following parameters:
•Hour
•Minute
•Day
•Month
• Year
10 OXIMAX N-65 Service Manual
Introduction
Set Menu Parameters
To set menu parameters, press the Menu button repeatedly during normal
operation to display the parameters to set. Use the Up Arrow button or Down
Arrow button to adjust the parameter limit. Press the Menu button to return to the
default monitoring display.
Table 1: Menu Structure
# of
Presses
1
2
3BPM Low
4 BPM High
Parameter Press Function
%SpO2 Low
Limit
%SpO2 High
Limit
Limit
Limit
Adjust limit
Adjust limit
Adjust limit
Adjust limit
5 Pulse Beep
Vo l u m e
6Alarm
Vo l u m e
7 Print Data Print summary and/or
OXIMAX N-65 Service Manual 11
Adjust volume. Indications
on blip bar.
Adjust volume. Indications
on blip bar.
stored snap-shot and
sensor-event data.
Introduction
WARNING: Do not silence the OXIMAX N-65 audible alarm, or decrease its
volume, if patient safety could be compromised.
Set Time/Date Parameters
To access the Time/Date settings menu, press the Menu button during start-up
Power-On-Self-Test (POST). Press the Menu button repeatedly to display the
time/date parameters to set. Use the Up Arrow button and Down Arrow button to
adjust time/date settings. Press the Menu button to return to the POST display.
When the month entry is made, the monitor checks the day selection to see if it is
valid. If the day selection is not valid for the month selected the menu display
returns to the day selection display.
When the year entry is made, the monitor checks the day and month selections to
see if they are valid. If the day or month selection is not valid for the year selected
the menu display returns to the day selection display.
Examples of invalid dates are:
• 30 February
• 31 February
•31 April
•31 June
• 31 September
•31 November
• 29 February on a non-leap year
12 OXIMAX N-65 Service Manual
Table 2: Time Set Menu
Introduction
# of
Presses
Parameter Press Function
The Menu button must be pressed during the
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
OXIMAX N-65 Service Manual 13
Introduction
Related Documents
http://www.mallinckrodt.com/respiratory/resp/Serv_Supp/Apartweb/main/PartAcceMenu.html
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 O
understand the various Nellcor approved O
monitor, refer to the individual O
XIMAX N-65. Refer to the OXIMAX N-65 Operator's Manual. To
XIMAX sensors that work with the
XIMAX 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:
14 OXIMAX N-65 Service Manual
Routine Maintenance
Cleaning
WARNING: Do not spray, pour, or spill any liquid on the OXIMAX N-65 its
accessories, connectors, switches, or openings in the enclosure as this may
damage the monitor.
For surface-cleaning and disinfecting follow your institution's procedures or:
•The O
dampened with either a commercial, nonabrasive cleaner or a solution of
70 percent alcohol in water, and lightly wiping the surfaces of the
monitor.
• The monitor may be disinfected using a soft cloth saturated with a ten
percent solution of chlorine bleach in tap water.
Before cleaning an SpO
with the O
that sensor.
Periodic Safety Checks
The OXIMAX N-65 does not require calibration.
A qualified service technician should perform the following safety checks every
24 months.
To perform periodic safety checks:
1. Inspect the equipment for mechanical and functional damage.
XIMAX N-65 may be surface-cleaned by using a soft cloth
2 OXIMAX sensor, read the Directions For Use enclosed
XIMAX sensor. Each sensor model has cleaning instructions specific to
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 monitor has been visibly damaged or subjected to mechanical shock (for
example, if dropped), immediately perform the performance tests. See
Performance Tests on page 17.
Every two years a qualified service technician should perform the electrical safety
tests detailed in Safety Tests on page 37. If the unit fails these electrical safety
tests, refer to Troubleshooting on page 39.
OXIMAX N-65 Service Manual 15
Routine Maintenance
Battery Installation
Caution: The monitor does not operate with dead batteries. Install new
batteries.
To install new batteries:
1. Press the Power button to turn the monitor off.
2. Pull the battery compartment latch downward, toward the bottom of the
3. Install four “AA” size batteries, orientated as shown in Figure 1.
4. Replace the battery access door.
monitor, and remove the battery access door. See Figure 1.
1 — Battery compartment latch
Figure 1: Installing Batteries
WARNING: Explosion hazard. Do not use the OXIMAX N-65 in the presence
of flammable anesthetics mixed with air, oxygen, or nitrous oxide.
16 OXIMAX N-65 Service Manual
Performance Verification
Introduction
This section discusses the tests used to verify performance following repairs or
during routine maintenance. All tests can be performed without removing the
O
XIMAX N-65 cover. All tests, except the battery charge and battery performance
tests, must be performed as the last operation before the monitor is returned to the
user.
If the monitor fails to perform as specified in any test, repairs must be made to
correct the problem before the monitor is returned to the user.
Equipment Needed
Equipment Description
Durasensor® OXIMAX oxygen sensor
XIMAX
oxygen sensor
O
Extension cable DEC-4
Nellcor model SRC-MAX Tester Provides testing for O
DS-100A
MAX-A
XIMAX compatible monitors
Performance Tests
The Power-On-Self-Test (POST) performance test verifies that the OXIMAX N-65
is ready for patient monitoring.
Power-On-Self-Test
Discussion
Before using the monitor, you must verify that it is working properly and is safe to
use. Proper working conditions are verified each time the monitor is turned on as
described in the following procedure. The POST verification procedure takes
approximately 10 seconds to complete.
Caution: If any indicator or display element does not light when the monitor
is turned on, do not use it. Instead, contact qualified service personnel, your
local Nellcor representative, or Nellcor’s Technical Services Department.
Note: Physiological conditions, medical procedures, or external agents that may
interfere with the monitor’s ability to detect and display accurate measurements
include: dysfunctional hemoglobin, arterial dyes, low perfusion, dark pigment,
and externally applied coloring agents, such as nail polish, dye, or pigmented
cream.
Note:The O
XIMAX N-65 automatically starts POST, which tests the monitor
circuitry and functions.
OXIMAX N-65 Service Manual 17
Performance Verification
Caution: During POST (immediately after power-up), confirm that all
display segments and icons are shown, and the monitor speaker sounds a
one-second tone.
When the monitor is turned on, the backlight remains on. The display displays the
following sequence, in order, as POST takes place:
• All display graphics are shown for three seconds and the backlight is
turned on.
• The display goes blank (all display elements off) for one second.
• The software version number displays for three seconds as a three digit
number in the right number field (with leading zeros if the version
number is less than 100) and two dashes in the left number field.
• The current time of day is shown in 24-hour format.
• Successful completion of POST is announced by a POST pass tone. A
failed POST is announced by a high-priority alarm tone.
Procedure
To run POST:
1. Press the Power button to turn on the monitor.
Note: Do not have a sensor connected to the monitor.
The backlight remains on during POST.
All display numbers and icons are shown for three seconds. The backlight is
turned on.
18 OXIMAX N-65 Service Manual
Performance Verification
2. The display goes blank for one second.
3. The software version number displays. The software version is identified by
two dashes in the %SpO
2 area of the display.
Note: The software version 001 is an example. Check the monitor for
the software version installed. Write down the software version number
and have it available prior to requests for technical assistance.
4. The current time displays in a 24-hour format.
OXIMAX N-65 Service Manual 19
Performance Verification
Note: If the time has never been set, do not continue until you set the
time. See Operator’s Manual.
5. If the monitor detects a problem, an error tone sounds and an error code (Er)
and the error number display. See Troubleshooting on page 39.
6. Upon successful completion of POST, the monitor sounds a one-second tone
to indicate it has passed the test.
WARNING: If you do not hear the POST pass tone, do not use the
monitor.
WARNING: Ensure that the speaker is clear of any obstructions
and that the speaker holes are not covered. Failure to do so could
result in an inaudible alarm tone.
20 OXIMAX N-65 Service Manual
Performance Verification
Note: In addition to serving as the POST pass verification, the POST
pass tone also functions as audible confirmation that the speaker is
performing properly. If the speaker does not function, the alarm warning
sounds cannot be heard.
7. Press the Alarm Silence button. The Alarm Silenced indicator displays.
8. Press the Alarm Silence button. The Alarm Silenced indicator does not
display.
9. Press the Backlight button. The backlight turns on.
10. Press the Backlight button. The backlight turns off.
OXIMAX N-65 Service Manual 21
Performance Verification
Operational Setup
The operational setup procedure sets the time and date into the monitor. Refer to
the O
monitor returns to the factory default settings when it is powered on: therefore,
individual parameter settings need to be set at that time.
Setting the Time and Date
Discussion
WARNING: The OXIMAX sensor uses the date and time provided by the
O
chip in the sensor. The accuracy of the date/time used for patient alarm
events depends on the date/time set in the monitor.
Note: When the monitor times-out in 30 seconds, the parameter is set and the
monitor display returns to the normal operation.
Normal operation means:
XIMAX N-65 Operator’s Manual for individual parameter settings. The
XIMAX N-65 when the patient alarm events are recorded to the memory
• the monitor is turned on
• a sensor is connected to the monitor
• the sensor is applied to the patient
• the patient’s %SpO
2 (oxygen saturation percentage) and pulse rate
readings (BPM) are being reported
• no error conditions exist
Procedure
To set the time and date:
1. With the monitor in normal operation, press the Power button to turn the
monitor off.
2. Press the Power button to turn the monitor on.
22 OXIMAX N-65 Service Manual
Performance Verification
3. Press the Menu button during the POST operation until the set hours window
appears with the hours indication (13) flashing.
4. Press the Up Arrow button or the Down Arrow button until the desired hours
appear.
5. Press the Menu button to set the hours and show the minutes set display. The
minutes indication (45) flashes.
6. Press the Up Arrow button or the Down Arrow button until the desired
minutes appear.
OXIMAX N-65 Service Manual 23
Performance Verification
7. Press the Menu button to set the minutes and show the day set display. The
day indication (29) flashes.
8. Press the Up Arrow button or the Down Arrow button until the desired day
appears.
9. Press the Menu button to set the day and show the month set display. The
month indication (7) flashes.
10. Press the Up Arrow button or the Down Arrow button until the desired
month appears.
24 OXIMAX N-65 Service Manual
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