Nellcor ULTRA CAP N-6000 User manual

SERVICE MANUAL
NELLCOR® ULTRA CAP™
PULSE OXIMETER AND CAPNOGRAPH,
MODEL N-6000
Caution: Federal law (U.S.) restricts this device
to sale by or on the order of a physician.
Nellcor Incorporated
25495 Whitesell Street
Hayward, California 94545 U.S.A.
510 887-5858
1-800-NELLCOR
© 1993 Nellcor Incorporated . 028065A-0193

Corporate Headquarters
Nellcor Incorporated
25495 Whitesell Street
Hayward, California 94545
USA
Tel [phone]
ii
European Office Asia/Pacific Headquarters
Nelleor BV
Hambakenwetering 1
5231 DD ’s-Hertogenbosch
The Netherlands
Tel. [phone]
Nellcor Limited
Suite 1204C
Admiralty Centre, Tower 1
18 Harcourt Road
Hong Kong
Tel. [phone]
European Regional Offices
Northwest Europe
Nellcor Europe BV
Hambakenwetering 1
5231 DD ‘s-Hertogenbosch
The Netherlands
Tel. [phone]
Middle and Central Europe
Nelleor GmbH .
Black-&-Decker-Strasse 28
W-6270 Idstein
Germany
| Tel. [phone]
Southern Europe
Nellcor Sarl
3, rue du Petit Robinson
78353 Jouy-en-Josas Cedex
France
Tel. [phone]
European Local Offices
Nellcor (UK) Limited
University of Warwick
Science Park
Coventry CV4 7EZ
United Kingdom
Tel. [phone]
Nelleor (Belgium) NV/SA
Interleuvenlann 62/8 .
B-3001 Leuven
Belgium
Tel. [phone]

11
12
13
2.1
2.2
2.3
2.4
2.5
3.1
3.2
3.3
3.4
TABLE OF CONTENTS
Symbols AAA
We
Introduction... 나
Introduction......................... … 1-1
Warnings, Cautions, and Notes ... … 1-1
Description..................,..,............,... .. 1-2
1.8.1 Visible and Audible Indicators. „12
13.2 Audible Indicator....................... .. 1-2
13.3 Visible and Audible Alarms. 12
13.4 StatusMessages.............................. . 1-2
1.3.5 Automatic Self-Test and Warm-Up Time.. .. 1-3
1.3.6 On-Screen Menus..................,...,,,....... … 13
1.3.7 N-6000 Default and Custom Default Set-Up . .... 13
18.8 Trend Memory......:...,...............,,,,,...... レレ くく レト ニュ レッ くく トー トト ャ ッッ て と と ャ て て と て て とく ここ 13
1.3.9 Automatic Calibration..…..............,........,.,.......ss ss 13
1.3.10 Battery Operation .................. 13
1.3.11 Noninvasive Oximetry Sensors......................... 1-4
13.12 C-LOCK™ ECG Synchronization for Pulse Oximetry..
Principles of Operation. . 2-1
Overview......................... .. 21
PulseOximetrySubsystem....................... ‚... 2-1
2.2.1 C-LOCK ECG Synchronization „21
2.2.2 Automatic Calibration.................. „22
2.2.8 Functional versus Fractional Saturation...
2.2.4 - Measured versus Calculated Saturation .... ーー
Capnography Subsystem ............................ . 2-3
N20/02 Compensation ............ .. 2-5
24.1 Standard Gas Conditions ... .. 25
2.4.2 Pressure Broadening Compensation... 2-5
2.4.3. N20 Collision Broadening........... . 2-6
2.4.4 O2 Collision Broadening.........................,.,...........ss 2-6
2.4.5 Water Vapor Effect... issues 2-6
2.4.6 BTPS/ATPS Compensation. 2-6
2.4.7 Summary: Reported CO2 Values... .. 2-6
. Factory Calibrated Sensor μμ ΕΟΟ ρου .. 2-7
Circuit Analysis
Introduction................. . 3-1
CO2 Module Circuit Details. .. 3-2
3.2.1 Sensor Operation......... .. 3-2
3.2.2 CO2 Module Hardware .... ... .. 3-2
3.2.3 bDigital..................... ... .. 3-2
8.2.4 Motor Control........ 3-3
3.2.5 Signal Amplifier.. … 3-8
3.2.6 Heater 22220 … .. 3-8
3.2.7 Source.... 3-3
8.2.8 Barometer... ..
3.2.9 StatusLEDs.................... … 3-3
3.2.10 Status LED Summary............ ... BA
Oximetry Module Block Diagram Analysis … 3-4
© 8.8.1 OximetryModule........................ ... 3-4
Detailed Oximetry Module Circuit Analysis 3-6
3.4.1 Oximetry Module sense ας 3-6

3.5
3.6
4.1
4.2
4.3
4.4
5.1
5.2
5.3
6.1
6.2
7.1
7.2
7.3
8.1
8.2
8.3
9.1
iv
TABLE OF CONTENTS (continued)
Main Processor PCB Circuit Details. essences
8.5.1 Microprocessor Section.......,...............,....,......,
8.5.2 Power. Control.........
3.5.3 Reset and Watehdog......................
3.5.4 Battery Backup and Memory Retention............
8.5.5 Internal and External Serial Communications..
8.5.6 Graphical Display ..................,....,,.....,..,.
3.5.7 BEPROM..............
8.5.8 FLASH Memory.
8.5.9 Real Time Clock....
3.5.10 Audio Generation ....
3.5.11 Charging Indicator................
3.5.12 Patient Isolation Power Supply...
3.5.13 Front Panel Display Controller..
Power Supply-Charger PCB Circuit Details.........
3.6.1 Power Supply Charger Theory of Operation..
3.6.2 AC Rectifier and +12 volt Battery Charger...........
3.6.3 +5 Volt Logic and Display Power Supply ....
3.6.4 C-LOCK QRS Sync Input Circuit... …
Routine Maintenance ......................
Introduction............
Cleaning Instructions............
Changing Mains Voltage Input ....
Replacing or Changing the Fuse...
Packing and Shipping......
Överview...........................
Repacking In Original Carton..
Repacking In New Carton .......
Testing and Calibration ............
Description.....................
COs Display ConventionS 0
Disassembly Guide........
Introduction............ ..
”Disassempbly Procedure ees enten ennen nernnse
6.2.1 RemovinginstrumentCover........................... eker
6.2.2 Removing 了 attery. < scccrcre*
6.2.3 Removing Oximetry and C02 Subassembly.. „
6.2.4 Removing Main Processor PCB........................... 0040000400000 000000e0 en
6.2.5 Removing Front Panel Assembly .............................,................,.....
6.2.6 Removing Pull-Out Card Tray...
6.2.7 Removing Speaker............................
6.2.8 Removing Power Supply-Charger Assembly.
6.2.9 Removing Transformer..........
7.2.1 Service Screen and Display Conventions...................
7.2.2 Breath Detection and Display of End-Tidal CO2 Values.. … 72
Calibration and Accuracy Check ui iii .. 7-6
Troubleshooting........................ . 8-1
Introduction....... . 8-1
Advisory Messages. ーー .. 8-6
Status Messages..... ... .. 8-7
Spare Parts........ … .. 9-1
In го ас 6101... sise 9-1

TABLE OF CONTENTS (continued)
10 ¡ACA essences
10.1 Overview.........
1 Specifications.............
11.1 Physical/Environmental.........
11.2 Components and User Interface..
113 Controls and Indicators...........
114 Connectors................
185 Performance.
11.6. Calibration.....
11.7. Airway Adapter EP O KO KO R O R K KK O RR ek 6
11.8 再 jectrical. 0 0000 Koh OK S KO RS O O KOK KK P KKK oP P een εως
2 Schematic Diagrams.. .
12.1 Introduction...................,......,................. see K R PK O v Kone
LIST OF FIGURES
2-1 Oxyhemoglobin Dissociation Curve.......................................... 0.0000 öseeeeeea
2-2 Nondispersive Infrared CO2 Analyzer..
3-1 Overall Block Diagram..........................
3-2 Oximetry Module Overall Block Diagram...
3-3 LRD Driver Cireuit に し に に に に レート ーーー・
3-4 Input Signal Processing.
3-5 Input Amplifier, Synchronous Detector, and Filter/Amplifier
8-6 A:D Conversion Circuits.......................,.......,,,...........
8-7 Support Circuits................... ..
4-1 North American Fuse Аттапветейв............. линии нии ини тни низине нение
4-2 European Fuse Атгапретейф............... ss наити
6-1 Disassembly Diagram..............
7-1 Failed LED Digits
7-1 Service Screen IndicatiomS レレ ーー トレ ーー トト ーー スー スト ドー くに トー トト トト トス スレ (レレ に レレ に トス レト ストー て
8-1 Troubleshooting Guide
The following are trademarks of Nellcor Incorporated: NELLCOR, which is registered in the
United States and other countries; C-LOCK, which is registered in the United States;
OXISENSOR;; and ULTRA CAP, which is a commercial trademark.
The N-6000 is covered by the following patents: U.S. Patent No. 4,621,643; 4,653,498; 4,700,708;
4,770,179; 4,802,486; 4,869,254; 4,928,692; 4,934,372; and corresponding patents in other countries,

O/O
Sc
nx
el
κ
SYMBOLS
FRONT PANEL
On/Standby eke
Pulse tone volume MENU
Audible alarm off A
+ ni
C-LOCK signal lost
Low battery
Battery charging
220/240V~ INSTRUMENT ONLY
FRONT PANEL
A
vi
Attention: Refer to operator’s
manual!
Freeze
Menu
Audible alarm on
C-LOCK in use
Battery in use
Type BF equipment,
(patient electrically isolated)

SYMBOLS
BACK PANEL
= Battery fuse Fuse replacement
AS ECG input O Eguipotential ground
MO
On/Off
<>
RS232
RS232inputoutput
port
Type
BF
equipment,
À
(patient
electrically
isolated)
110/120 VOLT INSTRUMENTS ONLY
BACK PANEL
Attention: Refer to operator’s
Instrument not anesthetic VAN manual!
proof.
vii

WARNINGS
The N-6000 contains no user-serviceable parts. For protection against electrical hazard, all
service must be performed by qualified personnel.
. [For protection against fire hazard, replace fuses only with the same type and rating.
The N-6000 is a patient-connected medical device. Isolated patient connectors protect the patient
from potentially dangerous electrical potentials or ground paths. To protect the integrity of this
connection, the procedures and part specifications contained in this manual must be adhered to.
viii

SECTION I
Introduction
1.1 INTRODUCTION
This manual contains information for servicing the NELLCOR® ULTRA CAP™ pulse oximeter
and capnograph, model N-6000. Service of this product must be done by qualified service
personnel, who have a technical background in analog and digital electronics.
Note: This manual is written for an N-6000 configured for English-language displays and
service screens. If the unit is configured for French or German, the technician must change the
language option to English. To reach the language selection menu from the main monitoring
screen, press the Freeze button on the front panel while the main monitoring screen is displayed,
and then press the second and fourth soft keys from the left at the same time. The legend
“LANGUAGE” (LANGUE in French and SPRACHE in German) appears above the fourth soft key
from the left. Press this key to gain access to the language selection menu and select “ANGLAIS”
or “ENGLISCH.”
ㆍ The N-6000 is a compact, microprocessor-controlled instrument used for continuous real-
time monitoring of oxygen saturation (SpO2), pulse rate (PR), inspired CO2 (ins.), end-tidal
carbon dioxide (ETCO2), and respiratory rate (RR).
. SpO2 is noninvasively and continuously measured using Nellcor's reusable or adhesive
SpO2 sensors which are available for a variety of patient sites. SpO2 values are displayed
numerically, while the plethysmograph is displayed as a waveform, A bar graph indicator
shows the patient’s relative pulse strength as measured by the pulse oximetry circuits.
ㆍ ETCOs is determined by positioning an infrared mainstream CO2 sensor across an
intubated patient’s airway (15 mm diameter). The amount of CO2 present at the end of
exhalation is displayed numerically, while CO2 is displayed as a waveform.
This manual is intended for use by authorized service personnel, trained in servicing analog and
digital patient monitoring equipment. Service personnel must have read ahd understood the
N-6000 operator’s manual and be familiar with instrument operation before attempting
maintenance or repair.
12 WARNINGS, CAUTIONS, AND NOTES
Before you read the N-6000 service manual, it is important to understand the following terms.
These terms identify information that pertains to technician and patient safety, and indicates
proper operation of this instrument.
WARNING: A warning describes a condition that may result in injury to the patient, operator or
service technician. WARNINGS are always in boldface type and boxed.
Caution: Cautions describes a condition that may result in damage to the instrument. Cautions are
always in boldface type.
Note: A note gives information that warrants special attention.
1-1

1.3 DESCRIPTION
The following paragraphs describe the N-6000 and list important features.
1.3.1 Visible and Audible Indicators
The N-6000 features numeric displays of SpO2, PR, RR, and ETCO2:
. C02 and plethysmographic waveform displays: and a pulse amplitude bar graph, which
* provides a qualitative indication of pulse strength at the oximetry sensor.
9 Trends are acquired for all parameters, and the following five trend screens can be
displayed: SpO2 trend alone; CO2 trend alone; SpO2 and CO2 trends; pulse rate and
respiratory rate trends; SpOz, CO2, pulse rate, and respiratory rate trends.
ㆍ When the operator connects the monitor to AC power and turns on the rear-panel on/off
switch, a battery charging indicator lights.
1.3.2 Audible Indicator
Pulse rate and oxygen saturation are indicated audibly with a tone that signals each pulse. The
pitch of this tone changes with variation in SpO2, rising as saturation increases and falling as it
decreases. This. early warning system encourages prompt corrective action since the clinician
can watch the patient and listen for SpO2 changes simultaneously.
1.3.3 Visible and Audible Alarms
The monitor has both visible and audible alarms. These alarms are activated when a variable
moves outside an adjustable limit (operator-defined), when the monitor detects loss of pulse or
apnea, or when a sensor gets disconnected. The tone and pattern of the audible alarm depend on the
priority of the alarm state. Pressing the ALARM SILENCE button turns off the audible portion of
the alarm temporarily. A flashing ALARM SILENCE indicator adjacent to the ALARM SILENCE
button alerts the operator that the alarm tone has been silenced temporarily. A steady ON of the
ALARM SILENCE indicator warns that one or more parameters have had their audible alarm
function disabled. Visible alarms appear on the monitor sereen, and unlike audible alarms, they
are always operational.
Note: The SpO2 and ETCO2 numeric indicators change from green to red when an alarm occurs.
Note: When the French language is chosen and one or more of the parameters have had the error
audible alarm function disabled, a single tone occurs every three minutes.
1.3.4 Status Messages
A status message is displayed in case an error condition occurs. An error condition will be
identified by a module identifier and an error code number that assists service personnel in
troubleshooting the problem. (See section VIII for more information.)