Welch Allyn Spot Vital Signs LXi User manual

Welch Allyn Spot Vital Signs LXi
Service Manual
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BR A Un

Welch Allyn Spot Vital Signs LXi
Service Manual

ii Welch Allyn Spot Vital Signs LXi
Copyright 2008 Welch Allyn. All rights are reserved. No one is permitted to reproduce or duplicate, in any
form, this manual or any part thereof without permission from Welch Allyn.
Welch Allyn assumes no responsibility for any injury to anyone, or for any illegal or improper use of the
product, that may result from failure to use this product in accordance with the instructions, cautions,
warnings, or statement of intended use published in this manual.
Welch Allyn®, Spot Vital Signs®, SureBP®Technology, and SureTemp®are registered trademarks of Welch
Allyn.
Braun ThermoScan®is a registered trademark of the Braun Company.
LNCS™is a trademark 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.
Nellcor®and Oxi-Max®are registered trademarks of Nellcor Puritan Bennett Inc.
Software in this product is Copyright 2008 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.
For information about any Welch Allyn product, call Welch Allyn Technical Support:
Reorder #4500-89
Manual Material No. 704432 Ver. D
Printed in USA
USA [phone]
+ 1 315 685 4560
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Welch Allyn
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Welch Allyn Ltd.
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EC REP

Service Manual Contents iii
Contents
1 - Safety Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Introduction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Warnings and Cautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Electrostatic Discharge (ESD) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Symbols . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
2 - Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Purpose and Scope . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Other Applicable Documents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Miscellaneous Mounting Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Mobile Stand Kit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Radio Mounting Accessory. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Barcode Reader Mounting Accessory . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Warranty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Service . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Spot Vital Signs LXi Configurations. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Controls . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Display Window . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
3 - Functional Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Self Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Internal Configuration Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
4 - Spot Vital Signs LXi Technical Overview. . . . . . . . . . . . . . . . . . . . . 35
System Description. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
SpO2Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
Radio Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
Bar Code Scanner Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
Printer Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
Interconnect Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
5 - Maintenance and Service . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
Cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
Battery Replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
Spot Vital Signs LXi Firmware Upgrade CD . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
Spot Vital Signs LXi Radio Configuration CD . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
Product Disposal. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
6 - Calibration and Verification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
Te r m s . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 9
Pneumatic test assembly setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
Voltage Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
Pressure verification test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52

iv Contents Welch Allyn Spot Vital Signs LXi
Blood pressure calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54
Functional tests. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56
Te m p er a tu re Fu n ct i o n a l C he ck . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 8
Masimo SpO2 Functional Check. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61
Nellcor SpO2 Functional Check. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61
7 - Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63
Performance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63
SpO2Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65
Mechanical . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67
Electrical . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67
Patents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67
Battery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67
Environmental. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67
Radio. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68
Guidance and Manufacturer’s Declaration For Spot Vital Signs LXi Radio . . . . . 69
8 - Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73
Error Codes. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73
Radio Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 83
Service Work Checklist . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 84
Radio Configuration Utility . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 85
9 - Supplies and Accessories. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 87
Blood Pressure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 87
Te m p er a tu re . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 8
Pulse Oximetry . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 89
Miscellaneous. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 92
Service Contracts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 94
10 - Field Replaceable Units. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 95
11 - D i s a s s e m b l y a n d Re p a i r . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 101
To o l l is t . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 101
Key Pad Disassembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 105
SpO2Circuit Board Disassembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 106
Blood Pressure Circuit Board Disassembly . . . . . . . . . . . . . . . . . . . . . . . . . . . 108
LCD Inverter Ballast Board Disassembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 109
LCD Disassembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 109
Pump Disassembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 110
RS232-Communication Circuit Board Disassembly . . . . . . . . . . . . . . . . . . . . . 110
Fan and Power Circuit Board Disassembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . 111
Thermometry Circuit Board Disassembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 111

Service Manual Contents v
12 - Repair Test Specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 115
General Unit Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 115
Te m p er a tu re O p ti o n R e q u i r em e nt s . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 116
SpO2Option Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 117
Fail Safe Test. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 117

vi Contents Welch Allyn Spot Vital Signs LXi

1
1
Safety Summary
Introduction
All users of the Spot Vital Signs LXi must read and understand the safety summary, and
all additional specific warnings and cautions located throughout the documentation.
Warnings and Cautions
Familiarize all operating personnel with the general safety information in this summary.
Specific warnings and cautions are also found throughout this manual.
General Warnings
A warning statement in this manual identifies a condition or practice, which if not
corrected or discontinued immediately, could lead to patient injury, illness, or death.
These warnings pertain entirely to Spot Vital Signs LXi.
WARNING The information in this manual is a comprehensive guide to the
operation of Spot Vital Signs LXi. For best results, read this manual thoroughly
before using the device.
WARNING Spot Vital Signs LXi is designed for medical clinician use. Although
this manual may illustrate medical spot-check techniques, only a trained clinician
who knows how to take and interpret a patient’s vital signs should use this
device.
WARNING Spot Vital Signs LXi is not intended for use in environments that are
without health care practitioner supervision.
WARNING Spot Vital Signs LXi is not intended for continuous monitoring. Do
not leave the device unattended while taking measurements on a patient.
WARNING To e n s u r e d a t a i n t e g r i t y, s a ve r e a d i n g s a n d c l e a r t h e S p o t V i t a l S i g n s
LXi display between patients.
WARNING The Spot Vital Signs LXi is not defibrillator proof.
WARNING Spot Vital Signs LXi is not intended for use during patient transport.
WARNING This device is not suitable for use in the presence of a flammable
anesthetic mixture with air or oxygen or nitrous oxide. An explosion may result.

2Safety Summary Welch Allyn Spot Vital Signs LXi
WARNING To e n s u re pa t i e n t safe t y, u s e o nly a c c e ss o r i e s a n d s u p pli e s ( i . e .,
cuffs, hoses, temperature probes, SpO2sensors, etc.) recommended for or
supplied with Spot Vital Signs LXi. Using unapproved accessories with Spot Vital
Signs LXi can affect patient and/or operator safety.
WARNING Take care to prevent wate r or ot her fluid from entering any
connectors on the device. Should this occur, dr y the connectors with warm air.
Check the accuracy of all operating functions.
WARNING Every three months, inspect the blood pressure cuff, SpO2 cable,
and other accessories for fraying or other damage. Replace as necessary.
WARNING Do not use Spot Vital Signs LXi on patients who are on heart/lung
machines.
WARNING Electric shock hazard. There are no user-serviceable parts inside Spot
Vital Signs LXi other than battery replacement (see “Battery Replacement” on
page 46). An operator may only perform maintenance procedures specifically
described in this manual. For service, refer the device to an Authorized Service
Center.
WARNING This device is not intended for hand-held use during operation.
WARNING Do not autoclave.
WARNING This device complies with current required standards for
electromagnetic interference and should not present problems to other
equipment or be affected by other devices. As a precaution, avoid using this
device in close proximity to other equipment.
WARNING Welch Allyn is not responsible for the integrity of any mounting
installation. Welch Allyn recommends that the customer contact their Biomedical
Engineering Department or maintenance service to ensure professional
installation for safety and reliability of any mounting accessory.
WARNING The Spot Vital Signs LXi consists of high-quality precision parts.
Protect it from severe impact and shock. A qualified service technician must
check any Spot Vital Signs LXi that is dropped or damaged for proper operation
prior to further use. Do not use the Spot Vital Signs LXi if you notice any signs of
damage. Contact the Welch Allyn Customer Service Department for assistance.
WARNING Do not use an SpO2finger clip sensor and a blood pressure cuff
simultaneously on the same limb. Doing so may result in inaccurate pulse rate
and perfusion readings.
WARNING All signal input and output (I/O) connectors are intended for
connection of only devices complying with IEC 60601-1, or other IEC standards
(for example, IEC 60950) as appropriate to the device. Connecting additional
devices to the Spot LXi may increase leakage currents. To maintain operator and
patient safety, it is necessary to consider the requirements of IEC 60601-1-1.
WARNING For proper patient electrical isolation, use only a Welch Allyn power
supply (4500-101A) to charge Spot Vital Signs LXi and its attached peripheral
devices. Do not use an external charger while the printer or weight scale is
attached to Spot LXi.

Service Manual Safety Summary 3
Blood Pressure Warnings
These warnings pertain to the Spot Vital Signs LXi blood pressure feature.
WARNING Spot Vital Signs LXi is not intended to measure BLOOD PRESSURE
on neonatal patients. The AAMI SP10:2002 standard defines neonates as children
28 days or less of age if born at term (37 weeks gestation or more); otherwise up
to 44 gestational weeks.
WARNING To ensure pediatric blood pressure accuracy and safety, the Child
Reusable Two-Piece Blood Pressure Cuff (4500-01), Infant Durable One-Piece
Cuff (5082-82-4MQ), and the Infant Disposable One-Piece Cuff (5082-92-4MQ)
are the smallest cuffs approved for use with young children and infants. The
child’s arm must fit within the range markings on the cuff.
WARNING Avoid compression of the blood pressure hose or cuff tubing of Spot
Vital Signs LXi. This may cause system errors to occur in the device.
WARNING Patients who are experiencing moderate to severe arrhythmias may
give inaccurate blood pressure measurements.
WARNING Spot Vital Signs LXi does not operate effectively on patients who are
experiencing convulsions or tremors.
WARNING Use only Welch Allyn blood pressure cuffs and/or hoses. Using other
manufacturers’ blood pressure cuffs and/or hoses may produce inaccurate blood
pressure readings.
WARNING When several blood pressure measurements are taken on the same
patient, regularly check the cuff site and extremity for possible ischemia, purpura,
and/or neuropathy.
WARNING Do not allow a blood pressure cuff to remain on the patient more
than 10 minutes when inflated above 10 mmHg. This may cause patient distress,
disturb blood circulation, and contribute to injury of peripheral nerves.
WARNING Do not place the cuff on any extremity that is used for intravenous
infusions or any area where circulation is compromised.
WARNING Excessive cuff tightness may cause venous congestion and
discoloration of the limb.
WARNING Wrapping the cuff too loosely (preventing proper inflation) may result
in errors.
WARNING Do not change the connector(s) on the blood pressure cuff tubing of
this device to luer type. Luer type connectors are commonly used in intravenous
infusion systems. Using the luer connectors on blood pressure cuff tubing
creates the risk that the blood pressure tubing could be mistakenly connected to
a patient's intravenous line, resulting in the introduction of air into the patient's
circulatory system.

4Safety Summary Welch Allyn Spot Vital Signs LXi
Temperature Warnings
These warnings pertain to the Spot Vital Signs LXi temperature feature.
SureTemp®Plus
These warnings are specific to the SureTemp Plus thermometer option.
WARNING Use only Welch Allyn probe covers. Using other manufacturers’
probe covers or no probe cover may produce temperature measurement errors
and/or inaccuracy.
WARNING Always use a probe cover whenever coming into contact with a
patient.
WARNING Long-term continuous monitoring beyond three to five minutes is
not recommended in any mode.
WARNING Oral/axillary probes (blue ejection button at top of probe) and blue
removable probe wells are used for taking oral and axillary temperatures only.
Rectal probes (red ejection button) and red removable probe wells are used for
taking rectal temperatures only. Use of the probe at the wrong site will result in
temperature errors. Use of the incorrect removable probe well could result in
patient cross-contamination.
WARNING The thermometer connectors and probe are not waterproof. Do not
immerse or drip fluids on these items. Should this occur, dry the connectors and
probe with warm air. Check all functions for proper operation and accuracy.
WARNING Do not take an axillary temperature through patient’s clothing. Direct
probe cover to skin contact is required.
WARNING Do not autoclave.
WARNING Use Welch Allyn single-use disposable probe covers to limit patient
cross-contamination.
WARNING Incorrect insertion of probe can cause bowel perforation.
WARNING Washing hands greatly reduces the risk of cross-contamination and
nosocomial infection.
WARNING To ensure optimal accuracy, always confirm that the correct mode is
selected.

Service Manual Safety Summary 5
Braun Thermoscan PRO 4000
These warnings are specific to the Braun ThermoScan PRO 4000 thermometer option.
SpO2Warnings
These warnings pertain to the Spot Vital Signs LXi SpO2feature.
WARNING Keep the probe window clean, dry, and undamaged at all times to
ensure accurate measurements. To protect the probe window, always keep the
thermometer in the storage cover while transporting or when not in use.
WARNING Only use Braun ThermoScan probe covers with this thermometer.
Using other manufacturer’s probe covers or no probe cover may produce
temperature measurement errors and/or inaccuracies. If the thermometer is used
without a probe cover attached, clean the lens (see “Braun ThermoScan PRO
4000 Thermometer” on page 44).
WARNING Do not autoclave.
WARNING The thermometer is not waterproof. Do not immerse or drip fluids
on it. Should this occur, dry the thermometer with warm air. Check for proper
operation and accuracy.
WARNING Only use Spot Vital Signs LXi with Masimo or Nellcor SpO2option
with Masimo or Nellcor brand sensors and accessories, respectively. Using the
wrong or unapproved sensors or cables may cause improper performance.
WARNING The SpO2sensor and extension cables are intended for use only for
pulse oximetry measurements. Do not attempt to connect these cables to a PC
or any similar device.
WARNING Before using, carefully read the sensor Directions for Use, including
all warnings, cautions, and instructions.
WARNING Do not use a damaged sensor or pulse oximetry cable or a sensor
with exposed optical components.
WARNING Incorrect application or a long duration of use of an SpO2sensor may
cause tissue damage. Inspect the sensor site periodically as directed in the
sensor’s Directions for Use.
WARNING Certain ambient environmental conditions, sensor application errors,
and certain patient conditions may affect SpO2readings and pulse signal.
WARNING Do not immerse the sensor or patient cables in water, solvents, or
cleaning solutions (the sensors and connections are not waterproof). Do not use
irradiation, steam, or ethylene oxide for sterilization.
WARNING The SpO2in the Spot Vital Signs LXi device is not intended for use
as an apnea monitor.
WARNING Consider the SpO2an early warning device. As a trend toward
patient deoxygenation is indicated, use laboratory instruments to analyze blood
samples to completely understand the patient’s condition.

6Safety Summary Welch Allyn Spot Vital Signs LXi
General Cautions
A caution statement in this manual identifies a condition or practice, which if not
corrected or discontinued immediately, could lead to equipment failure, equipment
damage, or data loss.
These cautions pertain to the entire Spot Vital Signs LXi device.
WARNING Tissue damage can be caused by incorrect application or duration of
use of a Nellcor OxiMax sensor. Inspect the sensor site as directed in the sensor
Directions for Use.
WARNING Do not use the sensors during magnetic resonance imaging (MRI)
scanning. Induced current could potentially cause burns. The MS board pulse
oximeter may affect the MRI image, and the MRI unit may affect the accuracy of
the oximetry measurements.
WARNING Carefully route patient cabling to reduce the possibility of patient
entanglement or strangulation.
WARNING Failure to cover the Nellcor OxiMax sensor site with opaque material
in high ambient light conditions may result in inaccurate measurements.
Caution If the accuracy of any measurement is in question, check the patient’s
vital sign(s) with an alternate method and then check to verify the device is
functioning properly.
Caution Place the device on a secure surface or use one of the optional
mounting accessories.
Caution Do not place fluids on or near the device.
Caution It is recommended that the device is used within stated operating
temperature ranges (see “Environmental” on page 67). The device will not meet
its performance specifications if used outside these temperatures ranges.
Caution Always unplug the AC power transformer from the outlet before
moving the mobile stand to a new location.
Caution The basket has a three-pound weight limit. Take care not to exceed
this limit.
Caution Only use a 9V battery with the Healthometer scale. Remove and
discard the wall mounted power supply.
Caution When using the Healthometer scale, remove the two hex nuts on the
RS-232 cable, as supplied, before screwing the cable into the scale base.

Service Manual Safety Summary 7
Blood Pressure Cautions
These cautions pertain to the Spot Vital Signs LXi blood pressure feature.
Temperature Cautions
These cautions pertain to the Spot Vital Signs LXi temperature feature.
SpO2Cautions
These cautions pertain to the Spot Vital Signs LXi SpO2feature.
Caution Minimize extremity and cuff motion during blood pressure readings.
Caution If the blood pressure cuff is not at heart level, note the difference in
reading due to the hydrostatic effect. Add the value of 1.80 mmHg (.2 kPa) to the
displayed reading for every inch (2.5 cm) above heart level. Subtract the value of
1. 8 0 m m H g ( . 2 k P a ) f r o m t h e d i s p l a y e d r e a d i n g f o r e v e r y i n ch ( 2 . 5 c m ) b e l o w
heart level.
Caution Proper blood pressure cuff size and placement is essential to the
accuracy of the blood pressure determination. See Reusable Two-Piece Cuff
Measurements or Durable One-Piece Cuff Measurements of the Directions for
Use for sizing information.
Caution The position and physiologic condition of the subject can affect a blood
pressure reading.
Caution The SureTemp Plus feature only operates with the probe well in place.
Caution Do not use alkaline batteries in the Braun ThermoScan PRO 4000.
Caution Biting the probe tip may result in damage to the probe.
Caution The pulse oximeter is calibrated to determine the percentage of
arterial oxygen saturation of functional hemoglobin. Significant levels of
dysfunctional hemoglobin such as carboxyhemoglobin or methemoglobin may
affect the accuracy of the measurement.
Caution Some sensors may not be appropriate for a particular patient. If at
least 10 seconds of perfusion pulses cannot be observed for a given sensor,
change sensor location or sensor type for perfusion to resume.
Caution Physiological conditions, medical procedures, or external agents that
may interfere with the pulse oximeter’s ability to detect and display
measurements include dysfunctional hemoglobin, arterial dyes, low perfusion,
dark pigment, and externally applied coloring agents such as nail polish, dye, or
pigmented cream.
Caution When selecting a sensor, consider the patient’s weight and activity
level, the adequacy of perfusion, the available sensor sites, the need for sterility,
and the anticipated duration of monitoring.

8Safety Summary Welch Allyn Spot Vital Signs LXi
Electrostatic Discharge (ESD)
Electrostatic discharge is a sudden current flowing from a charged object to another
object or to ground. Electrostatic charges can accomulate 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, assum that they are static-sensitive
and handle them accordingly.
•Performallserviceproceduresinastatic-protected environment. Always use
techniques and equipment designed to protect personnel and equipment from
electrostatic discharge.
•Removestatic-sensitivecomponentsandassemblies from their static-shielding bags
only at static-safe workstations - a properly grounded table and grounded floor mat -
and only when you are wearing a grounded wrist strap (with a resistor of at least 1
megohm in series) or other grounding device.
•Useonlygroundedtoolswheninserting,adjusting,orremovingstatic-sensitive
components and assemblies.
•Removeorinsertstatic-sensitivecomponentsandassembliesonlywithmonitor
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 fromtheir protective bags and before
beginning any disassembly or assembly procedures.

Service Manual Safety Summary 9
Symbols
The following symbols are associated with the Spot Vital Signs LXi.
Safety Symbols
Button Symbols
Connection Symbols
Identifies information within the
manual to avoid injury.
Identifies information within the
manual to avoid equipment failure.
Caution: consult accompanying
documents
Internally Powered, Lead Acid
Battery
Handle with Care Transport Temperature
Storage Humidity Recycle
Class II Equipment Equipment is not protected against
the ingress of liquid.
Type BF Equipment On/Off
Recycle the product separate from
other disposables, see “Product
Disposal” on page 48.
Non-ionizing radiation (RF
transmitter)
Mode of Operation: Continuous DC Power In
Pb
IPXØ
Navigation Buttons Select
Blood Pressure Memory
Power On/Off
MEM
USB Connection Serial Port Connection

10 Safety Summary Welch Allyn Spot Vital Signs LXi
Agency Symbols
CERTIFIED TO:
CAN/CSA STD C22.2 NO. 601.1
CONFORMS TO:
UL STD 60601-1
IEC 60601-1
The CE mark on this product indicates that it has been tested to and conforms with
the provisions noted within the 93/42/EEC Medical Device Directive.
European Regulatory Manager
Welch Allyn Ltd.
Navan Business Park
Dublin Road
Navan, County Meath, Republic of Ireland
Tel.: [phone]
Fax: [phone]
CUS
166292
0297
EC REP

2
11
Overview
Purpose and Scope
The Spot Vital Signs LXi Service Manual is intended as a reference for maintenance and
repair to the field replaceable unit (FRU) level and are listed on page 95.
This manual provides the technical qualified service person with troubleshooting
information, repair procedures, and calibration and performance verification instructions. A
technical overview of the Spot Vital Signs LXi subsystems is provided as an introduction
to the device’s circuitry and pneumatics.
This manual is intended for the technical qualified service personnel. Service training
classes on Welch Allyn’s products are available. Contact Welch Allyn Technical Service for
information.
Other Applicable Documents
The Spot Vital Signs LXi Directions for Use manual is also available. Refer to this
document for information other than maintenance and repair.
Welch Allyn 9600 Plus Calibration Tester Directions for Use - for all models.
Braun ThermoScan PRO 4000 User’s Guide - for models 450E0, 45NE0, 45ME0.
Masimo Directions for Use - for models 45MT0, 45ME0.
Nellcor Directions for Use - for models 45NT0, 45NE0.
Note
If you crack the case some of these parts will need to be calibrated using the
repair tool. Internal replacement parts require the Welch Allyn Spot LXi repair
software.

12 Overview Welch Allyn Spot Vital Signs LXi
Miscellaneous Mounting Accessories
Wall Mount Kit
5
Welch Allyn is NOT responsible for the integrity of any wall
mounting interface.
Welch Allyn
recommends that the customer contact their Biomedical
Engineering Department or maintenance service to ensure
professional installation, safety, and reliability of any
mounting accessory.
Ensure you are using the appropriate
hardware to mount the device to a surface.
1
2
4
3
}
WALL MOUNT KIT
EF:4701-62
aterial #:711890 Rev. B
Attach bracket to wall before
assembling basket.