Care Fusion Alaris 8210 Series Operating manual

Technical Service Manual
Alaris®SpO2Modules
8210 Series (Nellcor®Technology)
8220 Series (Masimo®Technology)
Supports: Guardrails®Suite (v7)
Guardrails®Suite MX (v8)
December 2010
Alaris®Products
CHANNEL
SELECT
CHANNEL
OFF
MONITOR
A
L
A
R
M
M
ONI TO
R
ST
A
ND
B
Y
%SpO
2
PULSE (BPM)

Alaris®SpO2Modules
Technical Service Manual
General Contact Information
CareFusion
San Diego, California
http://www.carefusion.com/alaris
Customer Advocacy - North America
Clinical and technical feedback.
Phone: [phone]
E-Mail: [email protected]
Technical Support - North America
Maintenance and service information support; troubleshooting.
United States:
Phone:
888.876.4287
Canada:
Phone:
800.387.8309
Customer Care - North America
Instrument return, service assistance, and order placement.
United States:
Phone: [phone] Canada: Phone: [phone]

TABLE OF CONTENTS
i
Alaris®SpO2Modules
Technical Service Manual
Chapter 1 - General Information
1.1 Introduction....................................................................................................................................................................................... 1-1
1.2 Features.............................................................................................................................................................................................. 1-1
1.3 Alarms, Errors, Messages....................................................................................................................................................... 1-2
Chapter 2 - Checkout and Configuration
2.1 Introduction....................................................................................................................................................................................... 2-1
2.2 New Instrument Checkout....................................................................................................................................................... 2-1
2.3 Configuration Options and Setup - General................................................................................................................ 2-1
2.3.1 Configuration Notes.................................................................................................................................................................... 2-1
2.3.2 Factory Default Setting.............................................................................................................................................................. 2-2
2.3.3 Configuration Setup Notes...................................................................................................................................................... 2-2
2.4 Configuration Setup.................................................................................................................................................................... 2-2
2.4.1 Access System Configuration Options............................................................................................................................ 2-2
2.4.2 Alarm Limits...................................................................................................................................................................................... 2-3
2.4.3 Limit Mode......................................................................................................................................................................................... 2-4
2.4.4 Pulse Beep Volume..................................................................................................................................................................... 2-4
2.4.5 SatSeconds Limits (8210 Series)....................................................................................................................................... 2-5
2.4.6 Saturation Averaging Time (8220 Series)..................................................................................................................... 2-5
Chapter 3 - Preventive Maintenance
3.1 Introduction....................................................................................................................................................................................... 3-1
3.2 Cleaning.............................................................................................................................................................................................. 3-1
Chapter 4 - Principles of Operation
4.1 Introduction....................................................................................................................................................................................... 4-1
4.2 General Information.................................................................................................................................................................... 4-1
4.3 8210 Series (Nellcor®Technology).................................................................................................................................... 4-1
4.4 8220 Series (Masimo®Technology).................................................................................................................................. 4-2
Chapter 5 - Corrective Maintenance
5.1 Introduction....................................................................................................................................................................................... 5-1
5.2 Disassembly / Reassembly.................................................................................................................................................... 5-2
5.2.1 Removing Latch Assembly and Feet................................................................................................................................ 5-3
5.2.2 Removing IUI Connector Assemblies and Rear Case.......................................................................................... 5-4
5.2.3 Removing Frame Assembly................................................................................................................................................... 5-5
5.2.4 Removing Patient Connector Board Assembly.......................................................................................................... 5-6
5.2.5 Removing Logic Board Assembly...................................................................................................................................... 5-7
5.2.6 Removing Speaker...................................................................................................................................................................... 5-8
5.2.7 Removing Nellcor®SpO2Board and Power Supply Board Assemblies..................................................... 5-9

ii Alaris®SpO2Modules
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TABLE OF CONTENTS
Chapter 5 - Corrective Maintenance (Continued)
5.2.8 Removing Masimo®SpO2Board and Power Supply Board Assemblies................................................... 5-10
5.2.9 Removing IUI Bracket Strap and Bracket..................................................................................................................... 5-11
5.2.10 Removing Display Board Assembly.................................................................................................................................. 5-12
5.2.11 Removing Status Indicator Lens......................................................................................................................................... 5-13
Chapter 6 - Troubleshooting
6.1 Introduction....................................................................................................................................................................................... 6-1
6.2 Subsystem Codes and Error Code Matrix.................................................................................................................... 6-1
Chapter 7 - Illustrated Part Breakdown
7.1 Introduction....................................................................................................................................................................................... 7-1
7.2 Illustrations........................................................................................................................................................................................ 7-1
7.3 Parts List............................................................................................................................................................................................. 7-1
7.4 Ordering Parts................................................................................................................................................................................ 7-2
List of Figures
7-1 Front Case Assembly................................................................................................................................................................. 7-5
7-2 IUI Bracket - Frame..................................................................................................................................................................... 7-6
7-3 Masimo®SpO2Board - Power Supply Board Assembly...................................................................................... 7-7
7-4 Nellcor®SpO2Board - Power Supply Board Assembly........................................................................................ 7-8
7-5 Frame Assembly - Logic Board View...............................................................................................................................7-9
7-6 Frame - Front Case Assembly.............................................................................................................................................. 7-10
7-7 IUI Assembly.................................................................................................................................................................................... 7-11
7-8 Rear Case Assembly.................................................................................................................................................................. 7-12
7-9 Rear Label Locations................................................................................................................................................................. 7-13
7-10 Display Board Assembly.......................................................................................................................................................... 7-14
7-11 Logic Board Assembly............................................................................................................................................................... 7-15
7-12 Power Supply Board Assembly (8210 Series)........................................................................................................... 7-16
7-13 Power Supply Board Assembly (8220 Series)........................................................................................................... 7-17
List of Tables
1-1 Defined Terms................................................................................................................................................................................. 1-2
5-1 Required Materials, Supplies and Tools......................................................................................................................... 5-2
5-2 Torque Values................................................................................................................................................................................. 5-14
5-3 Level of Testing Guidelines..................................................................................................................................................... 5-15
6-1 Technical Troubleshooting Guide....................................................................................................................................... 6-2
6-2 Error Codes...................................................................................................................................................................................... 6-3
7-1 Parts List............................................................................................................................................................................................. 7-3

1-1
Alaris®SpO2Modules
Technical Service Manual
Chapter 1 – GENERAL INFORMATION
1.1 INTRODUCTION
This manual describes how to service the
SpO2Modules (8210 and 8220 Series). It is
used in conjunction with the following Alaris®
System documents and software:
• PC Unit / Pump Module (8000/8100
Series) Technical Service Manual
• Alaris®System Directions for Use (DFU)
• Maintenance Software and User Manual
(v8.1 or later)
This manual is intended for personnel
experienced in analysis, troubleshooting
and repair of analog/digital microprocessor-
based electronic equipment.
Reference the Alaris®System DFU for a
product introduction, detailed setup and
operation procedures, definitions (including
precaution definitions), specifications, and
other information related to the use of the
Alaris®System.
If the SpO2Module requires service while
under warranty, it must be serviced only by
CareFusion authorized service personnel.
Reference the "Warranty" and "Service
Information" sections in the Alaris®System
DFU.
1.2 FEATURES
• Functional blood oxygen saturation
percentage, pulse rate, pulse bar,
channel identification and scrolling
messages display (such as, alerts and
alarms).
• Alarm limit settings, trend data and
plethysmographic waveforms display.
• 8210 Series: SatSeconds alarm
Management Technology, to allow
monitoring of %SpO2below selected low
alarm limit for a period of time before an
audible alarm sounds.
CAUTION
To avoid damaging the keypad, do not use
sharp objects (such as, pens, pencils) to activate
switches.
CAUTION
Any attempt to service this product by anyone
other than an authorized CareFusion Service
Representative, while the product is under
warranty, may invalidate the warranty.

1-2 Alaris®SpO2Modules
Technical Service Manual
GENERAL INFORMATION
• 8220 Series: Signal Extraction
Technology®(SET®) for accurate readings
under extreme conditions (such as, low
perfusion and motion).
Reference the Alaris®System DFU for a list
of features and definitions.
1.2 FEATURES (Continued)
Table 1-1. Defined Terms
The following table identifies the defined terms used throughout this document for certain trademarked
products and product features.
Product / Feature Defined Term
Alaris®PC point-of-care unit PC Unit
Alaris®PC unit PC Unit
Alaris®Pump module Pump Module
Alaris®SpO2module SpO2Module
Guardrails®data set Data Set
1.3 ALARMS AND MESSAGES
Alarm messages are displayed on the
scrolling Message Display bar. Reference
the Alaris®System DFU for detailed
information.
An audio alarm and the Alarm Status
Indicator flash red when an alarm limit is met
or exceeded. All alarms can be temporarily
silenced by pressing the SILENCE key on
the PC Unit.

Chapter 2 – CHECKOUT AND CONFIGURATION
2-1
Alaris®SpO2Modules
Technical Service Manual
CAUTION
Should an instrument be dropped or severely
jarred, remove it from use immediately. It should
be thoroughly tested and inspected by qualified
service personnel to ensure proper function prior
to reuse.
2.1 INTRODUCTION
This chapter describes initial SpO2Module
setup and configuration. Due to product
changes over time, configurations described
in this chapter may differ from the instrument
being serviced.
2.2 NEW INSTRUMENT CHECKOUT
Prior to placing a new instrument in use,
perform a check-in procedure using the
Maintenance Software.
When powering up the instrument, verify
the instrument beeps and all display LED
segments flash. This confirms that the
instrument has performed its self test and
is operating correctly. During operation, the
instrument continually performs a self test,
and alarms and displays a message if it
detects an internal malfunction.
Contact CareFusion authorized service
personnel if the instrument has physical
damage, fails to satisfactorily pass the
startup sequence, fails a self test, or
continues to alarm.
2.3 CONFIGURATION OPTIONS AND
SETUP - GENERAL
Reference the Alaris®System DFU for the
following information:
• System Settings
• SpO2Module Settings
2.3.1 Configuration Notes
• Changes to factory default values are
retained after a power cycle.
• If Factory Default is Yes, then all
configuration settings are set to their
factory default.

2-2 Alaris®SpO2Modules
Technical Service Manual
CHECKOUT AND CONFIGURATION
>Select an Option
or EXIT
EXIT
Factory default:
No
PC Unit
Shared Infusion Settings
Pump Module
SPO2 Module
PAGE
DOWN
System Configuration - Module
• If Factory Default is No, then one or
more of the configuration settings has
been changed. If desired, Factory
Default can be selected and set to Yes,
which will set all configuration settings to
their factory default.
2.3.2 Factory Default Setting
To allow changes to be made to System
Configuration parameters:
1. Hold
OPTIONS key at power up.
2. Press Factory default soft key.
3. Press No soft key.
4. To accept change, press EXIT soft key.
2.3.3 Configuration Setup Notes
• Pressing
EXIT soft key while in a
System Configuration - Module screen
immediately powers system down, with
no "Powering Down" display.
• Pressing
EXIT soft key while in a System
Config - SPO2 screen returns display to
main System Configuration - Module
screen.
• Pressing
CONFIRM soft key while in a
System Configuration option screen:
- accepts existing setting or setting
change
- displays next option setting screen (if
applicable) or returns display to System
Config - SPO2 screen
• Pressing PC Unit’s CANCEL key while in
a System Configuration option screen:
- leaves setting unchanged
- returns display to System Config - SPO2
screen
2.4 CONFIGURATION SETUP
To change an option setting, ensure the
Factory default setting is No.
2.4.1 Access System Configuration Options
1. Hold
OPTIONS key at power up.
2.3 CONFIGURATION OPTIONS AND
SETUP - GENERAL (Continued)
2.3.1 Configuration Notes (Continued)
>Select an Option
or EXIT
EXIT
Factory default:
Yes
System Configuration - Module
PC Unit
Shared Infusion Settings
Pump Module
SPO2 Module
PAGE
DOWN
EXIT
System Configuration
Factory Default
Settings?
Yes
No
Selection of Yes sets all
System Configuration
parameters to the factory
default setting.

2-3
Alaris®SpO2Modules
Technical Service Manual
CHECKOUT AND CONFIGURATION
2. Press SPO2 Module soft key. To view
additional options, press PAGE DOWN
soft key.
2.4.2 Alarm Limits
The following displays represent the Adult
alarm limits but the same procedure is
used for configuring the Neonatal alarm
limits.
1. After accessing System Config - SPO2
options display, press Adult alarm
limits or Neonatal alarm limits soft
key.
2. To change an alarm limit, press soft key
next to parameter to be changed.
3. Enter a numeric value for selected
alarm limit. Adult %SPO2 HIGH limit
can be Off or a numeric value. Numeric
values can be entered using keypad
or and keys. Prompt changes
to >Press ENTER to CONFIRM after
a valid value has been highlighted for
3seconds.
>Select an Option
or EXIT
EXIT
System Config - SPO2 1 of 2
Adult alarm limits
No
Limits Mode:
Adult
Neonatal alarm limits
Pulse beep volume:
Off
SatSeconds limits:
10
PAGE
DOWN
>Select an Option
or EXIT
EXIT
System Config - SPO2 2 of 2
Sat Averaging time: 8
No
PAGE
UP
System Configuration - SPO2
Adult alarm limits
%SPO2
HIGH
%SPO2
LOW
Off
90
150
50
>Select Parameter Limit
PULSE
HIGH
PULSE
LOW
CONFIRM
System Configuration - SPO2
Adult alarm limits
%SPO2
HIGH
%SPO2
LOW
Off
90
150
50
PULSE
HIGH
PULSE
LOW
>Enter High %SPO2 Limit
CONFIRM
2.4 CONFIGURATION SETUP (Continued)
2.4.1 Access System Configuration Options
(Continued)
System Configuration - SPO2
Adult alarm limits
%SPO2
HIGH
%SPO2
LOW
_98
90
150
50
Off
PULSE
HIGH
PULSE
LOW
>Press CONFIRM to Apply
Changes
CONFIRM

2-4 Alaris®SpO2Modules
Technical Service Manual
CHECKOUT AND CONFIGURATION
System Configuration - SPO2
>Press CONFIRM
Louder
Pulse Beep
Volume
Softer
CONFIRM
Off
4. To accept change, press ENTER key.
• Display highlights next limit and
prompts for an entry.
5. To change another alarm limit, press
soft key for that parameter and make
necessary change.
6. To accept change(s), press CONFIRM
soft key.
2.4.3 Limit Mode
1. After accessing System Config - SPO2
options display, press Limits Mode soft
key.
• Limit Mode cannot be changed
if a Profile is being used for
programming.
2. Select Adult or Neonatal by pressing
applicable soft key.
• Following display represents
Neonatal alarm limits but same
procedure is used for configuring
Adult alarm limits.
3. To change an alarm limit, see "Alarm
Limits" section.
OR
To accept settings, press CONFIRM soft
key.
2.4.4 Pulse Beep Volume
1. After accessing System Config - SPO2
options display, press Pulse beep
volume soft key
• Following display reflects that Pulse
Beep Volume is Off. To display
volume options, press Louder soft
key.
2.4 CONFIGURATION SETUP (Continued)
2.4.2 Alarm Limits (Continued)
System Configuration - SPO2
PULSE
LOW
>Enter High Pulse Limit
98
90
150
50
%SPO2
HIGH
%SPO2
LOW
PULSE
HIGH
Adult alarm limits
CONFIRM
System Configuration - SPO2
Allows selection
between the
adult and neonatal
modes
of operation.
Adult
Neonatal
Limit Mode Setup
System Configuration - SPO2
Neonatal alarm limits
%SPO2
HIGH
%SPO2
LOW
88
70
120
40
PULSE
HIGH
PULSE
LOW
>Select Parameter Limit
CONFIRM

2-5
Alaris®SpO2Modules
Technical Service Manual
CHECKOUT AND CONFIGURATION
2. To increase volume, press Louder
soft key until desired volume level is
attained. To turn off pulse beep entirely,
press Off soft key.
• Selectable volume levels are 1, 2
and 3. Audio sounds for 1cycle.
3. To accept setting, press CONFIRM soft
key.
2.4.5 SatSeconds Limits (8210 Series)
1. After accessing System Config - SPO2
options display, press SatSeconds
limits soft key.
2. To change SatSeconds Limits, press
either Increase or Decrease soft key.
To turn off SatSeconds Limits, press
Off soft key.
• Selectable options are Off, or 10, 25,
50 and 100 seconds.
3. To accept settings, press CONFIRM soft
key.
2.4.6 Saturation Averaging Time (8220 Series)
1. After accessing System Config - SPO2
options display, page 2, press Sat.
Averaging time soft key.
2. To change Saturation Averaging Time,
press either Increase or Decrease soft
key.
• Selectable options are 2, 4, 8, 10,
12, 14 and 16 seconds. Fast sat
is enabled when 2or 4seconds is
selected.
3. To accept settings, press CONFIRM soft
key.
2.4 CONFIGURATION SETUP (Continued)
2.4.4 Pulse Beep Volume (Continued)
System Configuration - SPO2
> Press CONFIRM
Louder
Pulse Beep
Volume
Softer
CONFIRM
Off
System Configuration - SPO2
Increase
Decrease
Off
Nellcor SatSeconds Limits
25 SPO2
Seconds
CONFIRM
>Press Increase, Decrease
or Off
System Configuration - SPO2
Determines the averaging time
for the displayed data.
Increase
Decrease
Masimo Saturation Averaging
Time
8 Seconds
>Press CONFIRM
CONFIRM

2-6 Alaris®SpO2Modules
Technical Service Manual
CHECKOUT AND CONFIGURATION
THIS PAGE
INTENTIONALLY
LEFT BLANK

Chapter 3 – PREVENTIVE MAINTENANCE
3-1
Alaris®SpO2Modules
Technical Service Manual
WARNING
Failure to perform regular and preventive
maintenance inspections may result in improper
instrument operation.
3.1 INTRODUCTION
Perform regular and preventive maintenance
inspections to ensure that the SpO2Module
remains in good operating condition:
• Perform regular inspections before each
use.
• Perform preventive maintenance
inspections once a year.
Use the Maintenance Software to perform
calibration and preventive maintenance.
These requirements and guidelines are
intended to complement the intent of
the Joint Commission on Accreditation
of Healthcare Organizations (JCAHO)
requirements.
3.2 CLEANING
Reference the Alaris®System DFU.

3-2 Alaris®SpO2Modules
Technical Service Manual
PREVENTIVE MAINTENANCE
THIS PAGE
INTENTIONALLY
LEFT BLANK

Chapter 4 – PRINCIPLES OF OPERATION
4-1
Alaris®SpO2Modules
Technical Service Manual
4.1 INTRODUCTION
This chapter describes the SpO2Module
principles of operation.
Reference the PC Unit / Pump Module
(8000/8100 Series) Technical Service Manual
for Alaris®System principles of operation.
4.2 GENERAL INFORMATION
SpO2Module operation is based
on the principles of pulse oximetry.
Oxyhemoglobin and deoxyhemoglobin differ
in their absorption of red and infrared light
(spectrophotometry). The volume of arterial
blood in tissue and the light absorbed
by the blood changes during the pulse
(plethysmography).
Because oxyhemoglobin and
deoxyhemoglobin differ in light absorption,
the amount of red and infrared light
absorbed by blood is related to hemoglobin
oxygen saturation.
4.3 8210 Series (Nellcor Technology)
A pulse oximeter determines SpO2by
passing red and infrared light into an
arteriolar bed and measuring changes in
light absorption during the pulsatile cycle.
Red and infrared low-voltage light-emitting
diodes (LED) in the oximetry sensor serve as
light sources; a photo diode serves as the
photo detector.
To identify the oxygen saturation of arterial
hemoglobin, the monitor uses the pulsatile
nature of arterial flow. During systole,
a new pulse of arterial blood enters the
vascular bed, and blood volume and light
absorption increase. During diastole, blood
volume and light absorption reach their
lowest point. The SpO2Module bases its
SpO2measurements on the difference
between maximum and minimum absorption
(measurements at systole and diastole).

4-2 Alaris®SpO2Modules
Technical Service Manual
PRINCIPLES OF OPERATION
By doing so, it focuses on light absorption
by pulsatile arterial blood, eliminating the
effects of nonpulsatile absorbers (such as,
venous blood, tissue and bone).
Because light absorption by hemoglobin
is wavelength dependent and the mean
wavelength of LEDs varies, an oximeter
must know the mean wavelength of the
sensor’s red LED to accurately measure
SpO2. During monitoring, the instrument’s
software selects coefficients that are
appropriate for the wavelength of that
individual sensor’s red LED. Those
coefficients are then used to determine
SpO2.
To compensate for differences in tissue
thickness, the light intensity of the sensor’s
LEDs is adjusted automatically.
The SpO2Module measures functional
saturation (oxygenated hemoglobin
expressed as a percentage of the
hemoglobin that can transport oxygen).
It does not detect significant amounts
of dysfunctional hemoglobin (such as,
carboxyhemoglobin or methemoglobin). In
contrast, hemoximeters (such as, IL482)
report fractional saturation (oxygenated
hemoglobin expressed as a percentage
of all measured hemoglobin, including
measured dysfunctional hemoglobin).
To compare functional saturation
measurements to those from an instrument
that measures fractional saturation,
fractional measurements must be converted
as follows:
functional saturation =
fractional saturation
100 - (%carboxyhemoglobin + %methemoglobin)
When saturation is calculated from a
blood gas partial pressure of oxygen
(PO2), the calculated value may differ
from the SpO2measurement of the SpO2
Module. This usually occurs because the
calculated saturation was not appropriately
corrected for the effects of variables that
shift the relationship between PO2and
pH, temperature, the partial pressure
of carbon dioxide (PCO2), 2,3-DPG, and
fetal hemoglobin. To compare functional
saturation measurements to those from
an instrument that measures fractional
saturation, fractional measurements must be
converted as follows:
Oxyhemoglobin Dissociation Curve
4.4 8220 Series (Masimo Technology)
The SpO2Module uses the Masimo®
Signal Extraction Technology®(SET®) to
decompose the red and infrared pulsatile
absorbance signal into an arterial signal plus
a noise component. Its value is used to find
the SpO2saturation in an empirically derived
equation in the Masimo®SET®software. The
values in an internal look-up table are based
on human blood studies against a laboratory
co-oximeter on healthy adult volunteers in
induced hypoxia states during motion and
nonmotion conditions.
4.3 8210 series (Nellcor Technology)
(Continued)
x 100
pH
Temperature
PCO
2,3-DPG
Fetal Hb
2
¯
¯
¯

pH
Temperature
PCO
2,3-DPG
2
¯
¯
¯
100
50
0
50 100
PO (mmHg)
2
Saturation (%)
¬
®

Chapter 5 – CORRECTIVE MAINTENANCE
5-1
Alaris®SpO2Modules
Technical Service Manual
5.1 INTRODUCTION
This chapter describes how to disassemble
and reassemble the SpO2Module.
The circuit boards used in the SpO2Module
are fitted with surface mount devices and
are not field repairable. Return circuit
boards to an authorized CareFusion Service
Center for repair. Attempting circuit board
repairs voids all warranties.
For replacement part information, see the
"Illustrated Parts Breakdown" chapter.
Following any level of maintenance, perform
the applicable tests (see "Level of Testing
Guidelines" table).
Due to product changes over time,
components/assemblies illustrated in this
chapter may differ from the instrument being
serviced.
WARNING
Disconnect the SpO2Module from the Alaris®
System prior to performing maintenance.
The instrument case should only be opened
by qualified personnel using proper grounding
techniques.
CAUTION
CMOS devices are sensitive to static electrical
charges and may be damaged during repair if the
repair activity is not performed in an electrostatic
discharge (ESD) protected environment using
approved ESD protective procedures, including
personnel grounding.

5-2 Alaris®SpO2Modules
Technical Service Manual
CORRECTIVE MAINTENANCE
To disassemble the instrument, follow
the steps in order from the first step. To
reassemble, perform the steps in their
reverse order.
Before adhering gaskets and labels to the
instrument, clean the surface with a cotton
swab or soft cloth lightly dampened with 70%
Isopropyl Alcohol.
5.2 DISASSEMBLY / REASSEMBLY CAUTION
To avoid the risk of an electrical hazard or
damage to the instrument circuitry, do not
spray fluids directly onto the instrument or
allow fluids to enter the instrument.
Table 5-1. Required Materials, Supplies and Tools
NOTE: Contact/source information is subject to change.
• Silicone Grease, Dow Corning Molykote 33, or equivalent (http://www.dowcorning.com)
• #1 Phillips Screwdriver
• #2 Phillips Screwdriver
• Needle-Nose Pliers
• Small Diagonal Cutters
• Lint-free cloth (such as, Kimwipes or lint-free tissue)

5-3
Alaris®SpO2Modules
Technical Service Manual
CORRECTIVE MAINTENANCE
5.2.1 Removing Latch Assembly and Feet
1. Remove screws (2) attaching Latch
Assembly to bottom of Rear Case.
2. Remove Latch Assembly components.
Pay close attention to Compression
Spring location, to ensure proper
installation during reassembly.
3. Pull Feet (2) from underside of module.
During Reassembly:
Apply thin layer of Dow Corning Molykote 33
(or equivalent) silicone grease to Feet.
NOTE: The feet press-fit into the module.
Latch Screws
Compression Spring
Foot (2 PL)
Rear Case
This screw is for locking SpO2
Module to PC Unit, for fixed
configurations.
5.2 DISASSEMBLY / REASSEMBLY (Continued)

5-4 Alaris®SpO2Modules
Technical Service Manual
CORRECTIVE MAINTENANCE
5.2.2 Removing IUI Connector Assemblies
and Rear Case
1. Remove screws (2) attaching each IUI
(left and right) to module.
2. Remove screws (2) and associated
washers attaching Rear Case to
module.
3. Separate Rear Case from Front Case
by pulling Rear Case away from
module.
During Reassembly:
• Ensure ground clips are still installed on
both IUI connectors.
• To install Right IUI Connector Gasket,
remove protective backing and adhere to
IUI Connector.
• To install Left IUI Connector Seal, position
seal on one end of connector and stretch
to other end to conform to connector
body. Gently press on seal to seat
completely. Use lint-free swab to apply
alcohol to top, sides, and bottom of seal
for lubrication while installing to Rear
Case. Do not apply alcohol to contacts
or connector.
• Ensure Silicon Tubing in Rear Case is
in place and not damaged. (See Figure
7–8)
5.2 DISASSEMBLY / REASSEMBLY (Continued)
Left IUI Screws (2 PL)
Left IUI Connector
IUI Connector Seal
Rear Case Screw
and Washer (2 PL)
Right IUI Connector Gasket
Right IUI Connector
Right IUI Screws (2 PL)
Ground clip at each mounting
hole on both IUI Connectors.