Novametrix Medical Systems OXYPLETH 520A User manual

PRELIMINARY
OXYPLETH®
Service Manual
Pulse Oximeter
Model 520A
June 5, 2001
Catalog Number 5693-90-01
Novametrix Medical Systems Inc. Wallingford, Connecticut, U.S.A. 06492.
Copyright 1992-2001. All rights reserved. No part of this manual may be reproduced
without the written permission of Novametrix Medical Systems Inc.

Section
iModel 520A Service Manual 5693-90-01
PRELIMINARY
Guarantee
Equipment manufactured or distributed by Novametrix Medical Systems Inc., is
fully guaranteed, covering materials and workmanship, for a period of one year
from the date of shipment, except for certain disposable products and products with
stated guarantees other than one year. Novametrix reserves the right to perform
guarantee service(s) at its factory, at an authorized repair station, or at the
customer’s installation.
Novametrix’ obligations under this guarantee are limited to repairs, or at
Novametrix’ option, replacement of any defective parts of our equipment, except
fuses, batteries, and calibration gasses, without charge, if said defects occur during
normal service.
Claims for damages during shipment must be filed promptly with the transportation
company. All correspondence concerning the equipment must specify both the
model name and number, and the serial number as it appears on the equipment.
Improper use, mishandling, tampering with, or operation of the equipment without
following specific operating instructions will void this guarantee and release
Novametrix from any further guarantee obligations.
Caution: Federal (U.S.A.) law restricts this device to sale, distribution, or use by or
on the order of a licensed medical practitioner.
Copyright© 1992-2001 Novametrix Medical Systems Inc. This document contains
information which is proprietary and the property of Novametrix Medical Systems
Inc., and may not be reproduced, stored in a retrieval system, translated,
transcribed, or transmitted, in any form, or by any means, without prior explicit
written permission from Novametrix Medical Systems Inc.
Novametrix and OXYPLETH are a registered trademarks. SuperBright is a
trademark of Novametrix Medical Systems Inc.
The OXYPLETH® monitor and its sensors and accessories are covered by the
following US patents: 5,190,038 5,398,680 5,448,991 5,820,550 5,999,834
5,891,026 6,073,038 6,149,481. Other patents pending
Service Department
For factory repair service, call toll free
1-800-243-3444
In Connecticut, call Collect [phone]
Facsimile [phone]
World Wide Web: http://www.novame-
trix.com
Internet: [e-mail]

5-Jun-01 Model 520A Service Manual ii
PRELIMINARY
Revision History
August 31, 1992 Release 00. This manual replaces all preliminary versions.
Based on Revision 2.0 CPU software.
June 5, 2001 Revision 01. R-N905
Declaration of Conformity with European Union Directives
The authorized representative for Novametrix Equipment is:
European Compliance Services Limited
Oakdene House
Oak Road
Watchfield
Swindon, Wilts SN6 8TD
UK
Manufacturing, Quality and Safety
Novametrix manufacturing facility is certified to ISO 9001 and EN46001 (MDD93/
42/EEC Annex II). Novametrix Medical Systems Inc. products bear the “CE 0086”
mark. The product is certified by Underwriter’s Laboratories (UL) to bear the UL
mark; and tested by TUV Rheinland to IEC601-1 / EN60601-1.

iii Model 520A Service Manual 5693-90-01
PRELIMINARY
CContents
Contents ............................................................................................... iii
List of Figures ..................................................................................... vii
List of Tables...................................................................................... viii
Introduction........................................................................................... 1
Purpose ................................................................................................. 1
Technology Description ......................................................................... 1
Conventions Used In This Manual......................................................... 2
Acknowledgments ................................................................................. 2
Patient Safety ........................................................................................ 3
Warnings................................................................................................ 4
Cautions................................................................................................. 5
Front Panel ............................................................................................ 6
Rear & Top Panels ................................................................................ 7
Summary of Operation ......................................................................... 8
Menu Trees............................................................................................ 9
Electronic Theory of Operation ......................................................... 15
2472 Power Supply Board................................................................... 15
AC Mains and Battery Operation Overview ................................... 15
AC Mains Operation ...................................................................... 16
Battery Operation........................................................................... 16
2726 Power Supply Board................................................................... 17
AC Mains and Battery Operation Overview ................................... 17
AC Mains Operation ...................................................................... 17
Battery Operation........................................................................... 18
2471 & 2775 Main Board..................................................................... 19
Power On/Off Control Circuitry ...................................................... 19
Power Supplies.............................................................................. 20
Voltage References ....................................................................... 20
Preserving RAM and Real Time Clock Data.................................. 21

Contents
5-Jun-01 Model 520A Service Manual iv
PRELIMINARY
Low Battery Voltage Shutdown...................................................... 21
Timing Sequencer.......................................................................... 22
Data Sampling Controller............................................................... 22
Sensor LED Drive Circuits ............................................................. 23
Sensor Photodiode Return Path .................................................... 24
Calibrating the 20-Bit Analog-to-Digital Convertors ....................... 25
20-Bit Analog-to-Digital Conversion............................................... 26
Sensor Status Decoding and Conversion...................................... 26
Sensor Status Parameters............................................................. 27
Microprocessor .............................................................................. 28
Memory.......................................................................................... 28
Real Time Clock (RTC).................................................................. 29
Sound generator ............................................................................ 29
Keypanel Interface......................................................................... 30
Display Interface ............................................................................ 30
I/O Device Controller ..................................................................... 31
Watchdog Timer ............................................................................ 31
Serial I/O Controller ....................................................................... 32
RS232 Serial Communication........................................................ 33
Maintenance ........................................................................................ 35
General................................................................................................ 35
Maintenance Schedules ...................................................................... 35
Cleaning and Sterilization.................................................................... 36
Model 520A Monitor....................................................................... 36
Finger Sensor ................................................................................ 36
Y-SENSOR™ and Y-STRIP™ Taping System.............................. 36
Battery Life and Maintenance.............................................................. 37
Mains Voltage Configuration ............................................................... 37
Fuse Replacement......................................................................... 37
Changing the Mains Voltage Setting ............................................. 38
AC Mains on older style assemblies.............................................. 39
Replacing the AC Mains Fuse(s) ................................................... 40
Changing the AC Mains Voltage.................................................... 40
Assembly Exchanges .......................................................................... 41
Changing System Software ................................................................. 44
Changing System Software on 2471 Main Board.......................... 44
Troubleshooting.................................................................................. 47
Functional Test ................................................................................... 51
Introduction.......................................................................................... 51
Monitor Functional Test ....................................................................... 51
Special Power Up Functions ............................................................... 53

Section Contents
vModel 520A Service Manual 5693-90-01
PRELIMINARY
Accuracy Test ..................................................................................... 55
Introduction.......................................................................................... 55
Monitor Accuracy Test ......................................................................... 55
Calibration Tests................................................................................. 59
Introduction.......................................................................................... 59
Equipment Required and Test Setup .................................................. 59
Test Procedure .................................................................................... 60
Safety Testing...................................................................................... 63
Connecting to other Equipment ........................................................ 65
Connecting the Seiko DPU-414 Thermal Printer................................. 65
Configuring the Seiko DPU-414 Printer ......................................... 65
Setting the DIP switches:............................................................... 65
Connecting the ThinkJet Printer .......................................................... 67
Connecting the Model 315 Printer ....................................................... 67
Connecting Seiko DPU-411 Thermal Printer....................................... 68
Analog Output Module......................................................................... 69
Analog Output Setup ........................................................................... 70
Specifications...................................................................................... 73
General................................................................................................ 73
Oxygen Saturation (SpO2) Section ..................................................... 73
Pulse Rate Section .............................................................................. 73
General Specifications......................................................................... 74
Additional Features.............................................................................. 74
Accessories......................................................................................... 76
Model 520A ......................................................................................... 76
Parts Lists............................................................................................ 81
Family Tree.......................................................................................... 81
5693-01 MAIN ASSEMBLY ................................................................. 81
6538-01 REAR PANEL ASSY ............................................................. 82
5673-01 REAR PANEL ASSY ............................................................. 82
2726-01 POWER SUPPLY BD ASSY ................................................. 83
2472- 01 POWER SUPPLY BOARD ................................................... 84
5719-01 FRONT PANEL ASSY........................................................... 85
2473-01 ALERT BOARD ASSY .......................................................... 85
5720- 01 DISPLAY ASSY.................................................................... 85
5713-01 SPEAKER ASSY................................................................... 85
5714-01 BATTERY HARNESS ASSY................................................. 85
5728-01 CABLE ASSY ........................................................................ 86
5765-01 TOP COVER ASSY............................................................... 86
5766-01 BOTTOM COVER ASSY....................................................... 86

Contents
5-Jun-01 Model 520A Service Manual vi
PRELIMINARY
2755-01 TONE GEN REPL BOARD ................................................... 87
2775-01 MAIN BOARD ASSY ............................................................. 87
2471-28 MAIN BD KIT (part of 2775-01) ............................................. 89
2471-01 MAIN BOARD ASSY ............................................................. 91
Schematic and Assembly Drawings ................................................. 93
Notes.................................................................................................... 95

vii Model 520A Service Manual 5693-90-01
PRELIMINARY
FList of Figures
Figure 1. Front Panel Description ................................................................... 6
Figure 2. Rear and Top Panel Descriptions.................................................... 7
Figure 3. Figure 1. Front-End Timing............................................................ 23
Figure 4. Power Entry Fuse Access Door Opening ...................................... 40
Figure 5. Fuse Removal................................................................................ 40
Figure 6. Power Entry Module Voltage Selector Drum Removal .................. 41
Figure 7. Power Entry Module Voltage Selection Adjustment ...................... 41
Figure 8. Removing the Top Cover............................................................... 42
Figure 9. Monitor Assembly .......................................................................... 42
Figure 10. 520A Assembly with 2471 Main Board Removed.......................... 43
Figure 11. Changing the System Software EPROM ....................................... 45
Figure 12. Softkey Identification...................................................................... 54
Figure 13. Connecting the ThinkJet Printer .................................................... 67
Figure 14. Connecting the Model 315 Printer ................................................. 68
Figure 15. Configuration of Seiko Thermal Printer.......................................... 68
Figure 16. Connecting the Seiko Model DPU-411 Printer. ............................. 69
Figure 18. Analog Output Module Pinouts ...................................................... 70
Figure 17. Analog Output Module ................................................................... 70
Figure 19. Analog Output Setup ..................................................................... 71

5-Jun-01 Model 520A Service Manual viii
PRELIMINARY
TList of Tables
Table 1. Display Command/Data table. ....................................................... 30
Table 2. CSI/O Decode Lines ...................................................................... 32
Table 3. SpO2 Display tolerances for TB500B settings............................... 57
Table 4. Analog Output Module Voltage Tolerances ................................... 71
Table 5. Schematic and Assembly Drawings .............................................. 93

Section List of Tables
ix Model 520A Service Manual 5693-90-01
PRELIMINARY

5-Jun-01 Model 520A Service Manual 1
PRELIMINARY
1Introduction
Purpose 1.1
This manual has been prepared for technicians servicing the Novametrix Model
520A Pulse Oximeter monitor. It presents technical information relating to the
monitor’s theory of operation, maintenance, calibration and repair. Refer to the
Pulse Oximeter Model 520A User’s Manual (Catalog Number 5693-23) for
additional information.
Technology Description 1.2
Pulse oximetry is a non-invasive method of monitoring the oxygen saturation of
arterial blood. Oxygen saturation monitoring is intended to be used in a variety of
clinical situations including, respiratory therapy, anesthesia, the intensive care unit
(ICU) and neonatal (NICU) and pediatric (PICU) intensive care units.
The Model 520A Pulse Oximeter provides reliable continuous measurement,
display, and alerts for oxygen saturation (SpO2) and pulse rate. The monitor can be
powered from its rechargeable internal battery or from the AC Mains.
The Model 520A utilizes sensors containing two light emitting diodes (LEDs) and
a photodiode. Each LED emits a specific wavelength of light (660 and 940
nanometers) through a pulsating vascular bed to the photodiode. Oxygen saturated
blood absorbs different amounts of light at each wavelength as compared to
unsaturated blood. Therefore, the amount of light absorbed by the blood in each
pulse can be used to calculate saturation.
The Model 520A is calibrated to display “functional”saturation. This differs from
the “fractional”saturation value displayed by most co-oximeters. Functional
saturation is defined as:
This can be considered to represent the amount of oxyhemoglobin as a percentage
of the hemoglobin that can be oxygenated. Dysfunctional hemoglobins (COHb and
METHb) are not included.
Functional Saturation = HbO2
100 - (COHb + METHb)
HbO2= Fractional Hemoglobin
COHb = Carboxyhemoglobin
METHb = Methemoglobin

Section 1 Introduction
2Model 520A Service Manual 5693-90-01
PRELIMINARY
Pulse Rate is calculated by measuring the time interval between detected peaks of
the infrared light waveform. The inverse of this measurement is displayed as pulse
rate.
The oxygen saturation and pulse rate values are displayed on monitor’s displays.
The displayed values are updated once each second. Presence of a pulse is shown
as a waveform on the display and indicated audibly by a user selectable “beep”.
The Model 520A must be used in conjunction with SuperBright™Sensors. These
sensors have an 8700 series part number (e.g., 8776 or 8791). An INCOMPATIBLE
PROBE display message will indicate a non-SuperBright™Sensor (e.g., 86xx
series) is in use.
Conventions Used In This Manual 1.3
The following conventions will be used throughout this manual:
•Normal text will be shown in this type.
•Message Center alerts and displays will be shown in this type.
•The names of the front panel pushbuttons (keys) will be shown in this type.
Acknowledgments 1.4
SuperBright, Y-STRIP and Y-SENSOR are trademarks of Novametrix Medical
Systems Inc. SARAcap is a registered trademark of Allegheny International
Medical Technology, Inc. (PPG Biomedical Systems).

5-Jun-01 Model 520A Service Manual 3
PRELIMINARY
2Patient Safety
The OXYPLETH Pulse Oximeter Monitor, Model 520A, SpO2Input is electrically
isolated. Patient leakage current flowing from the instrument to ground is limited to
less than 10 µA at 120 VAC, 60 Hz. Patient isolation is greater than 10 MΩ, 2500
VAC rms at 60 Hz.
For maximum patient and operator safety, the following are recommended:
•Failure of Operation: If the monitor fails to respond as described, do not use it until the
situation has been corrected by qualified personnel.
•Keep OXYPLETH and its accessories clean.
•Do not operate OXYPLETH when it is wet due to spills or condensation.
•Do not operate OXYPLETH if it appears to have been dropped or damaged.
•Connect the line cord only to a grounded hospital-grade outlet. OXYPLETH should be
connected to the same electrical circuit as other equipment in use on the patient. Outlets on the
same circuit can be identified by the hospital’s engineering department.
•Care should be exercised to assure continued peripheral perfusion distal to the SpO2sensor site
after application.
•Components of this product and its associated accessories which may have patient contact are
free of latex.

4Model 520A Service Manual 5693-90-01
PRELIMINARY
3Warnings
•Explosion Hazard: Do NOT use OXYPLETH in the presence of flammable anesthetics. Use of
this instrument in such an environment may present an explosion hazard.
•Electrical Shock Hazard: Always turn OXYPLETH off and remove line cord before cleaning
it. Do NOT use a damaged sensor or one with exposed electrical contacts. Refer servicing to
qualified service personnel.
•Do not operate OXYPLETH when it is wet due to spills or condensation.
•Do not operate OXYPLETH if it appears to have been dropped or damaged.
•Patient Safety: Extreme care should be exercised with neonates to assure continued circulation
distal to the sensor site after application.
•Failure of Operation: If the monitor fails to respond as described, do not use it until the
situation has been corrected by qualified personnel.
•Patient Safety: Care should be exercised to assure continued peripheral perfusion distal to the
SpO2sensor site after application.
•Data Validity: Inaccurate SpO2and/or Pulse Rate measurements can be caused by any of the
following:
•Incorrect application or use of a sensor
•Significant levels of dysfunctional hemoglobin such as carboxyhemoglobin or methemoglobin
•Significant levels of indocyanine green, methylene blue, or other intravascular dyes
•Exposure to excessive illumination such as surgical lamps—especially ones with a xenon light
source, or direct sunlight
•Excessive patient movement, venous pulsations, electrosurgical interference
•Data Validity: The Pulse Oximeter should not be used as a substitute for an ECG monitor. The
oximeter’s Pulse Rate display reflects the pulsatile flow found at the patient extremity
connected to the sensor. This rate can be affected by many factors and may occasionally be
“frozen.”
•Do NOT attach an SpO2sensor distal to a blood pressure cuff. Valid data CANNOT be
processed when the cuff is inflated. Attach the sensor to the limb opposite to the site used for
the blood pressure cuff.
•Do NOT apply Y-Sensor tapes or wraps so tightly that the circulation is restricted. Inspect site
often for adequate circulation - at least once every four hours. When applying sensors take note
of the patient’s physiological condition. For example, burn patients may exhibit more sensitivity
to heat and pressure and therefore additional consideration such as more frequent site checks
may be appropriate.
WARNING
Indicates a potentially harmful condition that can lead to personal injury
!

5-Jun-01 Model 520A Service Manual 5
PRELIMINARY
4Cautions
•Do not operate OXYPLETH when it is wet due to spills or condensation.
•Do not operate OXYPLETH if it appears to have been dropped or damaged.
•Never sterilize or immerse the monitor in liquids.
•Do not sterilize or immerse sensors except as directed in this manual.
•Tension should not be applied to the sensor cable.
•Overstretching the pulse oximeter finger sensor can damage the sensor and potentially affect
pulse oximeter readings. Do not stretch the finger sensor open beyond the limit for which it was
designed. Overstretching can be prevented: avoid opening the sensor by any means other than
squeezing the grips; Do NOT force the sensor onto large objects such as the bed rail.
•Do not store the monitor or sensors at temperatures less than 14°F (-10°C) or greater than 131°
F (55°C).
•Do not operate the monitor or sensors at temperatures less than 50°F (10°C) or greater than
104°F (40°C).
•Federal (U.S.A.) law restricts this device to sale, distribution, or use by or on the order of a
licensed medical practitioner.
CAUTION
Indicates a condition that may lead to equipment damage or malfunction.

6Model 520A Service Manual 5693-90-01
PRELIMINARY
5Front Panel
Figure 1. Front Panel Description
2
3
4
11
15
14
13
1
17
18
5
6
7910
16
1. Saturation% Display Area;
SpO2and alert limit settings are
displayed here.
2. Pulse Rate Display Area;
Pulse Rate and alert limit settings
are displayed here.
3. Message Center; area where
system messages are displayed.
The functions of the softkeys (#4)
are annotated here.
4. Softkeys # 1-5; Softkeys 1-5 (left
to right) cause the action
annotated in the lower half of the
Message Center to occur.
5. Carrying Handle; monitor
carrying handle molded into case
6. Sensor Input Connector;
Connect SuperBright™Sensors
here. Press tab on sensor
connector to remove sensor. Do
not twist connector.
7. Two Minute Silence Indicator;
Illuminates (yellow) when the
AUDIO key is pressed. SpO2and
Pulse Rate alarms are silenced for
two minutes.
8. Audio key; Press and release
AUDIO to turn on/off the two
minute silence function. Press and
hold (approx. 3 seconds) AUDIO
to enable the Audio Off feature
(unless disabled via Options
Menu). Press and release to
disable Audio Off.
9. Audio Off Indicator; Flashes
(yellow) as a warning that the
audible alarms have been
disabled.
10. Alert Indicator; Flashes (red)
when an alert/alarm occurs.
Continues to flash until condition
corrected and ALERT RESET is
pressed.
11. Alert Reset key; Press ALERT
RESET to disable any active alert
indicators. Alerts will reactivate if
alert condition still exists.
12. AC Power Indicator; Illuminates
(green) when the monitor is
connected to an AC (Mains)
power source and the rear panel
power switch is set to “|”.
13. Power key; Press POWER to turn
the monitor off and on.
14. Low Battery Indicator;
Illuminates (red) when the
monitor is powered from its
internal battery and less than 30
minutes of battery power remain.
15. Red Alert Bar; Flashes (red) when
an alert/alarm occurs (unless
disabled via Options Menu).
Continues to flash until condition
corrected and ALERT RESET is
pressed (unless “unlatched”by
the user via the Options Menu).
16. Front Feet; Rubber tipped front
feet (2). Kickstand; Two position
kickstand (not shown) lifts front
of monitor for viewing from
above.
17. Contrast; Press and hold for
display contrast adjustment,
release when desired contrast is
obtained.
18. Event; Press to mark an event in
trend memory.
12 8

5-Jun-01 Model 520A Service Manual 7
PRELIMINARY
6Rear & Top Panels
Figure 2. Rear and Top Panel Descriptions
12 34 5 67
10
9
11
8
1. Line Cord Clip; This clip can be
set around the line cord strain
relief so that the cord cannot be
pulled out of the connector.
2. Line Cord Connector; The AC
(Mains) line cord attaches to the
monitor here.
3. Fuse Compartment; The AC
(Mains) line fuse(s) are inside this
compartment. Pry open with
small screwdriver.
4. AC Mains Voltage; The currently
selected AC Mains input voltage
is identified here.
5. AC Mains Power Switch; With
switch in “O”position, AC Mains
voltage does not enter monitor.
With switch in “|”position, AC
Mains voltage allowed into
monitor to power unit and/or
charge internal battery.
6. Rear Feet; Rubber tipped rear feet
(2).
7. Serial Output Connector;
Serial (RS232) data output here
for use with Tele-Sat™telemetry
system, optional analog output
module, and other RS232
interfaces. A female 25-
pin “D”connector serves as the
interface connector.
8. Top Cover
9. Carrying Handle; Monitor
carrying handle molded into case.
10. Warning Label; Explosion and
electrical shock warnings.
11. Patient Isolation Label; The
Model 520A is Type BF
equipment.

8Model 520A Service Manual 5693-90-01
PRELIMINARY
7Summary of
Operation
This section summarizes the operation of the Model 520A Pulse Oximeter. It is
intended as a quick reference and refresher for persons who have thoroughly
reviewed the Model 520A User’s Manual (PN: 5693-23). Persons unfamiliar with
the Model 520A should thoroughly examine the User’s Manual before referencing
the steps listed here.
1. If powering the monitor from the AC line voltage; Connect the line cord to the
monitor and plug into a properly grounded 3-wire outlet. Set the rear panel
power (Mains) switch to the | (on) position.
2. Press the front panel POWER key to turn the monitor on. Verify the Message
Center displays Connect SPO2 Probe after the self-tests are complete.
3. Use the Menu System to modify the operation of the monitor to best suit your
application. The Menu System menus include:
•ALRT softkey - Use SEL to select SpO2 or Pulse limits, then use the ↑or
↓to set the limit to the desired value. Note that the monitor will maintain
a spread of at least 5 digits between the upper and lower limit values.
•TRND softkey - enters Trend mode and draws trend memory on display.
•MENU then AUDIO softkeys - Select Pulse to turn on/off and control the
volume of the audible beep with each detected pulse. Select ALERT to
control alert volume.
•MENU then AVG - Select either 2 second or 8 second SpO2 averaging
time.
•MENU then LITE softkeys - toggles backlight between bright and dim.
4. Verify that the SpO2and Pulse Rate alert limit settings are consistent with
your monitoring application.
5. Connect a SuperBright™(87xx series) sensor to the front panel input. Apply
the sensor to the patient.
6. Check that within several seconds the patient’s SpO2and Pulse Rate are
displayed on the monitor.
7. As necessary, refer to the appropriate sections within the User’s Manual for
detailed operating instructions and explanations.

5-Jun-01 Model 520A Service Manual 9
PRELIMINARY
8Menu Trees
The OXYPLETH menus are described on the following pages.

SCALE will appear only when DUAL is selected from Trend View Options
ERASE STORED TRENDS ?
YES NO
TREND RETAINED
ERASING TREND PLEASE WAIT
TREND ERASED message center
ALRT TRND MENU
SET ALERT LIMITS
RUN SEL ↑↓AUTO
NOT ENOUGH DATA TO
SET AUTO LIMITS
AUTO ALERT LIMITS SET
DRAWING TREND PLEASE WAIT
TREND MMMDD HH:MM:SS S P RUN EXPAN D <- ->
Moves Cursor Left /
DUAL XX HR
RUN EXPAN D <- ->
ERASE STORED TRENDS ?
YES NO
TREND OPTIONS:
RUN ERASE VIEW PREV
TREND VIEW:
SCALE DUAL SpO2 HIST PREV
TREND RETAINED
ERASING TRENDS PLEASE WAIT
SpO2 XX Hr
RUN EXPAN D <- ->
Moves Cursor Left/Right
Will select one of four settings:
12Hr, 8Hr, 2Hr, 30m
Will increase/decrease
limits on selected
parameter
yes no
Enough Data
for Auto Limits
?
TRENDS ERASED
MAIN MENU
POWER ON
Press to select Upper and
Lower Limits for Saturation
and Pulse Rate.
Displays HISTOGRAM
Previous Menu
Previous Menu
MAIN
MENU
Moves Cursor Left/
Will select one of four settings:
12Hr, 8Hr, 2Hr, 30m
MAIN
MENU
MAIN
MENU
MAIN
MENU
MAIN
MENU
MAIN
MENU
SPO2 PULSE
Select FULL or HALF
Will change XX value XX= one of
four settings: 12Hr, 8Hr, 2Hr, 30m
OXYPLETH™Menu Tree
Revision 2.7 Software
7-Feb-97
*
*