Hillrom Welch Allyn Connex Spot Monitor User manual

Welch Allyn®
Connex®Spot Monitor
Service manual
Software version 1.X

© 2021 Welch Allyn. All rights are reserved. The purchaser is permitted to copy this publication, for internal distribution only, from the
media provided by Welch Allyn. No other use, reproduction, or distribution of this publication, or any part of it, is permitted without
written permission from Welch Allyn.
Legal Statement . Welch Allyn, Inc. ("Welch Allyn”) assumes no responsibility for any injury to anyone that may result from (i) failure to
properly use the product in accordance with the instructions, cautions, and warnings published in this manual or the statement of
intended use published in the Instructions for use, or (ii) any illegal or improper use of the product.
Welch Allyn, Connex, SureTemp, FlexiPort, and SureBP are registered trademarks of Welch Allyn.
Eco Cuff is a trademark of Welch Allyn.
LNCS, ReSposable, and Rainbow are trademarks of, and SET, LNOP, and Masimo are registered trademarks of Masimo Corporation.
Possession or purchase of a Masimo SpO2-equipped device does not convey any express or implied license to use the device with
unauthorized sensors or cables which would, alone or in combination with this device, fall within the scope of one or more of the patents
relating to this device.
For Masimo patent information, please visit www.masimo.com/patents.htm.
Nellcor SpO2 Patient Monitoring System with OxiMax Technology and Nellcor SpO2 OxiMax Technology are trademarks of a Medtronic
company.
Braun and ThermoScan are registered trademarks of Braun GmbH.
Nonin is a registered trademark of Nonin Medical, Inc.
The Bluetooth word mark and logos are registered trademarks owned by Bluetooth SIG, Inc. and any use of such marks by Welch Allyn is
under license.
Software in this product is Copyright 2021 Welch Allyn or its vendors. All rights are reserved. The software is protected by United States of
America copyright laws and international treaty provisions applicable worldwide. Under such laws, the licensee is entitled to use the copy
of the software incorporated with this instrument as intended in the operation of the product in which it is embedded. The software may
not be copied, decompiled, reverse-engineered, disassembled, or otherwise reduced to human-perceivable form. This is not a sale of the
software or any copy of the software; all right, title, and ownership of the software remain with Welch Allyn or its vendors.
This product may contain software known as “free” or “open source” software (FOSS). Hill-Rom uses and supports the use of FOSS. We
believe that FOSS makes our products more robust and secure, and gives us and our customers greater flexibility. To learn more about
FOSS that may be used in this product, please visit our FOSS website at hillrom.com/opensource. Where required, a copy of FOSS source
code is available on our FOSS website.
PATENTS / PATENT hillrom.com/patents.
May be covered by one or more patents. See above Internet address. The Hill-Rom companies are the proprietors of European, US, and
other patents and pending patent applications.
For information about any product, contact Hillrom Technical Support: hillrom.com/en-us/about-us/locations/.
80019225 Ver. L
Revision date: 2021-10
This manual applies to 901058 VITAL SIGNS CORE MONITOR.
Welch Allyn, Inc.
4341 State Street Road
Skaneateles Falls, NY 13153 USA
hillrom.com
Welch Allyn, Inc. is a subsidiary of Hill-Rom Holdings, Inc.

Contents
Symbols and definitions .......................................................................................................... 1
Safety .............................................................................................................................................. 5
Warnings and cautions ..................................................................................................................................................... 5
General safety considerations ...................................................................................................................................... 6
Electrostatic discharge (ESD) ........................................................................................................................................ 6
Overview ....................................................................................................................................... 9
Purpose and scope ............................................................................................................................................................. 9
Technical support services .......................................................................................................................................... 10
Recommended service intervals ............................................................................................................................. 14
The Welch Allyn Service Tool ..................................................................................................................................... 15
Battery performance ....................................................................................................................................................... 16
Controls, indicators, and connectors ................................................................................ 19
Advanced settings ................................................................................................................... 23
Access Advanced settings ........................................................................................................................................... 23
General tab ............................................................................................................................................................................ 24
Parameters tab .................................................................................................................................................................... 25
Network tab .......................................................................................................................................................................... 26
Service tab ............................................................................................................................................................................. 31
Power-up sequence ................................................................................................................ 35
Bluetooth wireless technology ........................................................................................... 37
Enable Bluetooth pairing ............................................................................................................................................ 37
Pair a device with Bluetooth wireless technology ....................................................................................... 37
Bluetooth Low Energy (BLE) workflow ................................................................................................................ 39
Disassembly and repair ......................................................................................................... 41
Required tools and equipment ................................................................................................................................ 42
Torque value table ............................................................................................................................................................ 42
Connector types ................................................................................................................................................................ 43
Disassembly overview .................................................................................................................................................... 46
Power down the monitor ............................................................................................................................................ 47
Remove the monitor from the stand .................................................................................................................... 48
Exploded view diagram ................................................................................................................................................ 49
Remove the battery ......................................................................................................................................................... 50
Remove the back housing .......................................................................................................................................... 51
Remove the temperature module or housing ............................................................................................... 52
Disassemble the main PCA board .......................................................................................................................... 55
iii

Remove the speaker ........................................................................................................................................................ 55
Separate the main PCA board from the front housing ............................................................................. 56
Remove the SpO2 insert ............................................................................................................................................... 57
Remove the SpO2 board .............................................................................................................................................. 61
Remove the communications board .................................................................................................................... 64
Remove the touchscreen and display ribbon cable separately from the main PCA
board ......................................................................................................................................................................................... 66
Remove the pump assembly ..................................................................................................................................... 71
Replace the main PCA board ..................................................................................................................................... 72
Disassemble the front housing ................................................................................................................................ 73
Remove the bezel from the front housing ....................................................................................................... 73
Accessory Power Management (APM) work surface ................................................................................. 74
Remove the APM work surface from the stand ............................................................................................. 74
Remove the APM work surface battery ............................................................................................................... 75
Disassembly and assembly notes for mobile stands and power supplies .................................... 77
Field replaceable units ........................................................................................................... 89
Device serial number and model label ............................................................................................................... 91
About 4th Edition Service kits .................................................................................................................................. 91
About 3rd Edition service kits .................................................................................................................................... 92
Cleaning requirements .......................................................................................................... 97
Prepare to clean the equipment ............................................................................................................................. 97
Remove liquid spills from the monitor ................................................................................................................ 99
Clean the equipment ..................................................................................................................................................... 99
Dry the equipment ........................................................................................................................................................100
Store the device .............................................................................................................................................................. 100
Cleaning accessories .................................................................................................................................................... 100
Clean the Braun ThermoScan PRO 6000 contacts .....................................................................................100
Decontamination and cleaning requirements for returns ................................................................... 101
Device configuration and setup ...................................................................................... 103
Configuration overview ..............................................................................................................................................103
Functional verification and calibration overview ...................................................... 107
Functional verification tests .....................................................................................................................................107
Basic functional verification ..................................................................................................................................... 111
Full functional verification and calibration .....................................................................................................120
Options and upgrades ......................................................................................................... 125
Available options ............................................................................................................................................................126
Install options ................................................................................................................................................................... 127
Upgrading software with the Welch Allyn Service Tool ........................................................................ 127
Upgrade the device firmware .................................................................................................................................128
SmartCare™ services for maintenance and repair ..................................................................................... 128
Service and repair training ........................................................................................................................................130
Appendix .................................................................................................................................. 131
Specifications ....................................................................................................................................................................131
Factory defaults ............................................................................................................................................................... 142
Install the Nurse Call cable ........................................................................................................................................152
Configure a remote VNC connection ................................................................................................................ 152
iv Contents Welch Allyn® Connex® Spot Monitor

Troubleshooting .................................................................................................................... 155
Interpreting log file output ...................................................................................................................................... 155
Symptoms and solutions ........................................................................................................................................... 160
Technical alarm and information messages .................................................................................................. 171
Connex Direct ......................................................................................................................... 217
Introduction ....................................................................................................................................................................... 217
Active Directory setup ................................................................................................................................................. 221
Project workflow ............................................................................................................................................................. 242
Troubleshooting ............................................................................................................................................................. 242
Identifying the monitor and subsystems ..................................................................... 249
Monitor serial number and model label .......................................................................................................... 249
Monitor circuit board and internal options label ....................................................................................... 249
Model number format and code .......................................................................................................................... 250
Interconnect diagram .................................................................................................................................................. 252
Service and maintenance toolset .................................................................................... 253
Service software IT setup .................................................................................................... 255
Service record ......................................................................................................................... 257
Service manual Contents v

vi Contents Welch Allyn® Connex® Spot Monitor

Symbols and definitions
Documentation symbols
For information on the origin of these symbols, see the Welch Allyn symbols glossary: https://
www.hillrom.com/content/dam/hillrom-aem/us/en/sap-documents/LIT/80022/
80022945LITPDF.pdf.
WARNING The warning statements in this manual identify conditions or practices
that could lead to illness, injury, or death. Warning statements appear with a grey
background in a black and white document.
CAUTION The caution statements in this manual identify conditions or practices
that could result in damage to the equipment or other property, or loss of data. This
definition applies to both yellow and black and white symbols.
Follow instructions for use (IFU) -- mandatory action.
A copy of the IFU is available on this website.
A printed copy of the IFU can be ordered from Welch Allyn for delivery within 7
calendar days.
Power symbols
Stand-By Equipotential Ground
Power plug Battery absent or faulty
Alternating Current power
present, battery fully charged Battery charge level
Alternating Current power
present, battery is charging Battery
1

Alternating current (AC) Rechargeable battery
Rated power input, DC Rated power input, AC
Lithium-ion battery Direct current (DC)
Protective Earth (PE)
Connectivity symbols
Bluetooth®Ethernet
USB Nurse call
Wireless signal strength
• Best (4 bars)
• Good (3 bars)
• Fair (2 bars)
• Weak (1 bar)
• No signal (no bars)
• No connection (blank)
Miscellaneous symbols
Manufacturer Defibrillation-proof Type BF
applied parts
Product Identifier Serial Number
Reorder Number China RoHS markings for
control of pollution caused by
electronic information
products. XX indicates
2Symbols and definitions Welch Allyn® Connex® Spot Monitor

Environmentally Friendly Use
Period in years.
Do not reuse, Single use
device Separate collection of Electrical and Electronic
Equipment. Do not dispose as
unsorted municipal waste.
Non-ionizing electromagnetic
radiation Call for maintenance
Task Light Prescription only or "For Use
by or on the order of a
licensed medical professional"
This way up Fragile
IPX2 IP = International Protection
Marking
X = No object ingress rating
2 = Protected against
vertically falling water drops
when enclosure tilted up to
15°
Australian Communications
and Media Authority (ACMA)
Radio Compliance Mark (RCM).
Temperature limit Global Trade Item Number
Stacking limit by number Keep dry
Humidity limitation Recyclable
Maximum safe working load
limits Mass in kilograms (kg)
Japan's PSE approval symbol
for Category A Medical device
Atmospheric pressure
limitation
Service manual Symbols and definitions 3

Screen symbol
Process indicator for activities like acquiring measurements
and connecting to a laptop
4Symbols and definitions Welch Allyn® Connex® Spot Monitor

Safety
All users of the monitor must read and understand all safety information presented in this manual
before using or repairing the monitor.
United States federal law restricts this device to sale, distribution, or use by or on the order of a
licensed medical practitioner.
Warnings and cautions
WARNING Safety risk. Make frequent electrical and visual checks on cables,
sensors, and electrode wires. All cables, sensors, and electrode wires must be
inspected and properly maintained and in proper working order to allow the
equipment to function properly and to protect patients.
WARNING Safety risk. Place the monitor and accessories in locations where they
cannot harm the patient should they fall from a shelf or mount.
WARNING Fire and explosion hazard. Do not operate the monitor in the presence
of a flammable anesthetic mixture with air, oxygen, or nitrous oxide; in oxygen-
enriched environments; or in any other potentially explosive environment.
WARNING Inaccurate measurement risk. Dust and particle ingress can affect the
accuracy of blood pressure measurements. Use the monitor in clean environments
to ensure measurement accuracy. If you notice dust or lint build-up on the
monitor’s vent openings, have the monitor inspected and cleaned by a qualified
service technician.
WARNING Defective batteries can damage the monitor. If the battery shows any
signs of damage or cracking, it must be replaced immediately and only with a
battery approved by Welch Allyn.
CAUTION Before disassembling the device or installing options, disconnect the
patient from the monitor, power down the device, and disconnect the AC power
cord and any attached accessories (for example, SpO2 sensors, blood pressure
hoses and cuffs, and temperature probes) from the device.
CAUTION To ensure that the monitor meets its performance specifications, store
and use the monitor in an environment that maintains the specified temperature
and humidity ranges.
5

CAUTION The monitor may not function properly if dropped or damaged. Protect
it from severe impact and shock. Do not use the monitor if you notice any signs of
damage.
CAUTION Do not connect more than one patient to a monitor or connect more
than one monitor to a patient.
CAUTION Do not operate the monitor in the presence of magnetic resonance
imaging (MRI) or hyperbaric chambers.
General safety considerations
• If the monitor detects an unrecoverable problem, it displays an error message. For more
information, see “Troubleshooting.”
• To ensure patient safety, use only accessories recommended or supplied by Welch Allyn. (See
the accessories list in the Appendix of the Instructions for use or https://direct.hill-rom.com/
hillromUS/en.) Always use accessories according to your facility’s standards and according to
the manufacturer’s recommendations and instructions. Always follow the manufacturer’s
directions for use.
• Welch Allyn recommends that only Welch Allyn service personnel or an authorized repair
center perform warranty service. Performing unauthorized service on a device that is within
warranty may void the warranty.
Electrostatic discharge (ESD)
CAUTION Electrostatic discharge (ESD) can damage or destroy electronic
components. Handle static-sensitive components only at static-safe workstation.
CAUTION Assume that all electrical and electronic components of the monitor
are static-sensitive.
Electrostatic discharge is a sudden current flowing from a charged object to another object or to
ground. Electrostatic charges can accumulate on common items such as foam drinking cups,
cellophane tape, synthetic clothing, untreated foam packaging material, and untreated plastic bags
and work folders, to name only a few.
Electronic components and assemblies, if not properly protected against ESD, can be permanently
damaged or destroyed when near or in contact with electrostatically charged objects. When you
handle components or assemblies that are not in protective bags and you are not sure whether
they are static-sensitive, assume that they are static-sensitive and handle them accordingly.
• Perform all service procedures in a static-protected environment. Always use techniques and
equipment designed to protect personnel and equipment from electrostatic discharge.
• Remove static-sensitive components and assemblies from their static-shielding bags only at
static-safe workstations—a properly grounded table and grounded floor mat—and only when
6Safety Welch Allyn® Connex® Spot Monitor

you are wearing a grounded wrist strap (with a resistor of at least 1 megohm in series) or other
grounding device.
• Use only grounded tools when inserting, adjusting, or removing static-sensitive components
and assemblies.
• Remove or insert static-sensitive components and assemblies only with monitor power turned
off.
• Insert and seal static-sensitive components and assemblies into their original static-shielding
bags before removing them from static-protected areas.
• Always test your ground strap, bench mat, conductive work surface, and ground cord before
removing components and assemblies from their protective bags and before beginning any
disassembly or assembly procedures.
Service manual Safety 7

8Safety Welch Allyn® Connex® Spot Monitor

Overview
Purpose and scope
This service manual is a reference for periodic preventive maintenance and corrective service
procedures for the Welch Allyn Connex Spot Monitor. It is intended for use only by trained and
qualified service personnel.
Corrective service is supported to the level of field-replaceable units. These include circuit-board
assemblies and some subassemblies, case parts, and other parts.
WARNING When performing a service procedure, follow the instructions exactly
as presented in this manual. Failure to do so could damage the monitor, invalidate
the product warranty, and lead to serious personal injury.
CAUTION No component-level repair of circuit boards and subassemblies is
supported. Use only the repair procedures described in this manual.
Find instructions for functional testing and performance verification in the Welch Allyn Service Tool
help files.
This manual applies only to this device. For servicing of any other vital signs monitor, see the
service manual for the specific device.
Service work not described in this manual must be performed by qualified service personnel at the
factory or at an authorized Welch Allyn service center.
Related documents
When using this manual, refer to the following:
•Connex® Spot Monitor Instructions for use (on the user documentation CD)
• Welch Allyn Service Tool:
https://www.hillrom.com/en/services/welch-allyn-service-tool/
•Welch Allyn Service Tool Installation and configuration guide:
https://www.hillrom.com/en/services/welch-allyn-service-tool/
•Welch Allyn Braun ThermoScan® PRO 6000 Themometer Instructions for use CD
•Welch Allyn Braun ThermoScan® PRO 6000 Charging Station Instructions for use CD
•Welch Allyn 9600 Plus Calibration Tester Directions for use https://assets.hillrom.com/is/content/
hillrom/80020333LITPDFpdf
• Hillrom website: hillrom.com
9

Technical support services
Welch Allyn offers the following technical support services:
• Telephone support
• Loaner equipment
• Service agreements
• Service training
• Replacement service parts
• Product service
For information on any of these services, go to this site:
https://www.hillrom.com/en/services/.
Service loaners
For warranty or non-warranty repairs not covered under a support agreement, loaners are available
for a nominal charge, subject to availability. Payment is required prior to shipment for all loaners
not covered under a support agreement. The loaner fee can be found on the Welch Allyn loaner
price list.
Welch Allyn Service Centers that provide repair service for this product can, on request, loan a
device for use while the device is being repaired. Loaned devices are provided free of charge for
products repaired while under a support agreement that includes a free loaner provision.
Service options
SmartCare™ services for maintenance and repair
While product warranties provide basic assurance of Welch Allyn hardware quality, they may not
include the full range of services and support you need. Welch Allyn offers premium service and
support through our SmartCare program. Whether you service your own devices and require a
minimum of support or rely on us to service your device, Welch Allyn provides a program that will
meet your needs. A list of available service and support agreements is presented in the "Field
replaceable units" section of this manual.
For more information, call your sales representative or visit our website:
https://www.hillrom.com/en/services/.
SmartCare Remote Management
SmartCare Remote Management is a secure cloud-based portal that offers biomeds access to
manage their Hillrom connected devices remotely in a centralized portal.
For more Information and a complete list of compatibility information, refer to the SmartCare
Remote Management Instructions for use.
Warranty service
All repairs on products under warranty must be performed or approved by Welch Allyn. Refer all
warranty service to Welch Allyn Product Service or another authorized Welch Allyn Service Center.
10 Overview Welch Allyn® Connex® Spot Monitor

Obtain a Return Material Authorization (RMA) number for all returns to Welch Allyn Product Service
from our website:
https://www.hillrom.com/en/services/explore-our-self-service-tools/repair-status-request/.
CAUTION Unauthorized repairs will void the product warranty.
Non-warranty service
Welch Allyn Product Service Centers and Authorized Service Providers support non-warranty
repairs. Contact any Welch Allyn regional service center for pricing and service options.
Welch Allyn offers modular repair parts for sale to support non-warranty service. This service must
be performed only by qualified end-user biomedical/clinical engineers using this service manual.
Service training is available from Welch Allyn for biomedical/clinical engineers. For information, go
to this site:
https://www.hillrom.com/en/knowledge/technical-training/.
Repairs
A Welch Allyn Service Center or Authorized Service Provider must perform all repairs on products
under warranty unless you are a properly certified technician that has successfully completed a
Welch Allyn Technical Training course. More information on Technical Training can be obtained
from your sales representative or by visiting https://www.hillrom.com/en/knowledge/technical-
training/.
CAUTION Unauthorized repairs will void the product warranty.
Qualified service personnel or a Welch Allyn Service Center should repair products out of warranty.
If you are advised to return a product to Welch Allyn for repair or routine maintenance, schedule
the repair with the service center nearest you.
Welch Allyn Technical Support
If you have a problem with the device that you cannot resolve, call the Welch Allyn Technical
Support Center nearest you for assistance. A representative will assist you in troubleshooting the
problem and will make every effort to solve the problem over the phone, potentially avoiding an
unnecessary return.
If your product requires warranty, extended warranty, or non-warranty repair service, a Welch Allyn
Technical Support representative will record all necessary information to issue an RMA number. The
support representative will provide you with the address of the Welch Allyn Service Center to send
your device to.
Technical support is available during local business hours.
Returning products
When returning a product to Welch Allyn for service, ensure that you have the following
information:
• Product name, model number, and serial number. This information may be found on the
product and serial number labels on the back housing.
Service manual Overview 11

• A complete return shipping address.
• A contact name and phone number.
• Any special shipping instructions.
• A purchase-order number or credit-card number if the product is not covered by a warranty.
• A full description of the problem or service request.
1. Obtain an RMA number. Either contact Welch Allyn and request an RMA number or visit us on
the web:
https://www.hillrom.com/en/services/explore-our-self-service-tools/repair-status-request/.
NOTE Welch Allyn does not accept returned products without an
RMA.
2. Ship the device to Welch Allyn, observing these packing guidelines:
a. Remove from the package the battery, all hoses, connectors, cables, sensors, power cords,
and other ancillary products and equipment, except those items that might be associated
with the problem.
Recommendations for returning Lithium-ion batteries
• Use ground transportation to return batteries.
• If returning multiple batteries, package each battery individually.
• Do not consolidate multiple batteries in a single package.
• Use packaging provided by Welch Allyn or the battery manufacturer.
• Do not pack a defective battery in checked or carry-on baggage if traveling by air.
Packaging
• If you return the battery with the device, remove the battery, seal the battery in an
antistatic plastic bag, and place the battery in the position reserved for the battery near
the device in the original shipping carton.
• If you return the battery separately, package the battery in the replacement battery’s
plastic bag and shipping box.
If the original shipping carton or replacement battery shipping box is unavailable, consult
the manufacturer website for information about shipping Lithium-ion batteries.
WARNING Safety risk. Do not ship any battery that has been
physically damaged or shows signs of leakage unless you
receive specific instructions which meet the requirements for
the shipment of Lithium-ion batteries. Dispose of damaged or
leaking batteries in an environmentally safe manner consistent
with local regulations.
12 Overview Welch Allyn® Connex® Spot Monitor

NOTE In the United States, the applicable regulations can be
found in the Code of Federal Regulations (CFR). Refer to 49 CFR
173.185 for shipping Lithium-ion batteries by air or ground. Use
49 CFR 172.102 sections A54 and A101 to find the special
provisions for shipping Lithium-ion batteries.
b. Clean the device.
NOTE To ensure safe receipt of your device by the service
center and to expedite processing and return of the device to
you, thoroughly clean all residues from the device before
you ship it to Welch Allyn. For decontamination and
cleaning requirements, see: Decontamination and cleaning
requirements for returns in the Cleaning requirements section.
If a returned device is found to be contaminated with bodily
fluids, it will be returned at the owner’s expense. United States
federal regulations prohibit the processing of any device
contaminated with blood-borne pathogens. Welch Allyn
thoroughly cleans all returned devices on receipt, but any
device that cannot be adequately cleaned cannot be repaired.
c. Put the device, enclosed in a plastic bag with a packing list, into the original shipping
carton with the original packing materials or into another appropriate shipping carton.
d. Write the Welch Allyn RMA number with the Welch Allyn address on the outside of the
shipping carton.
Service manual Overview 13

Recommended service intervals
To confirm that the device is functioning within the design specifications, perform periodic service
as indicated in the following table. Customers who have the Standard unlicensed edition of the
Welch Allyn Service Tool can perform the basic functional verification and calibration procedures
referenced in the table by following the instructions in this manual.
Component Service interval Service procedure
NIBP module Annually Basic functional verification
SpO2 module Annually Basic functional verification
SureTemp Plus Annually Basic functional verification
Braun ThermoScan PRO 6000 Annually1Basic functional verification
Battery Annually2Replace the battery
1In addition to this annual service interval, Welch Allyn recommends cleaning the contacts of the Braun
thermometer and dock every 4 months because debris that accumulates in the contacts can interfere with
data transmission. See "Clean the Braun ThermoScan PRO 6000 contacts" later in this manual.
2Battery performance is a function of clinical use and charge/discharge patterns. Welch Allyn recommends
replacing the battery after 1 year or when its remaining capacity no longer meets workflow requirements.
If you have the Gold edition of the service tool, use the tool to perform a complete functional
verification and calibration of the device in lieu of performing the basic tests. Perform a complete
functional verification and calibration of the device whenever any of the following conditions exist:
• The device does not meet specifications (based on the basic functional verification)
• The device has been dropped or otherwise damaged
• The device is malfunctioning
• The case has been opened
• An internal part has been replaced (battery excluded)
NOTE For instructions on using the Gold edition, see the Service Tool help files.
Maintenance
For device maintenance information, see “Maintenance and service” in the device’s Instructions for
use. This section covers the following topics:
• Perform periodic checks
• Replace the monitor battery
• Replace the APM work surface battery
• Cleaning requirements
NOTE Service-related cleaning is addressed in the service manual as well.
14 Overview Welch Allyn® Connex® Spot Monitor