Welch Allyn Medical Diagnostic Equipment Crib Toy Lxi Users Manual Service Manual, Spot

2015-02-03

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Welch Allyn Spot Vital Signs LXi

BP
SYS

127
73

4 WEST

DIA

mmHg

TEMP

SpO2

985
%

BP
SYS

127
73

4 WEST

mmHg

AM
Reading

TEMP

F
PULSE

DIA

/min

985

SpO2

Patient ID 0123456789
Weight
Pain
Clear
Height
Respiration
Send/Next Reading

Enter

AM
Reading

mmHg

Patient ID 0123456789

Weight
Height
Respiration

F
PULSE

/min

62
Pain
Clear
Send/Next Reading

Enter

BR
AUn

Service Manual

Welch Allyn Spot Vital Signs LXi

Service Manual

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:
USA +1 800 535 6663
+ 1 315 685 4560

Australia +61 2 9638 3000

Canada +1 800 561 8797

China +86 21 6327 9631

European Call Center +353 46 90 67790

France + 331 6009 3366

Germany +49 7477 9271 70

Japan +81 3 3219 0071

Latin America +1 305 669 9003

Netherlands +31 157 505 000

Singapore +65 6419 8100

South Africa +27 11 777 7555

United Kingdom +44 207 365 6780

Sweden +46 85 853 6551

Reorder #4500-89
Manual Material No. 704432 Ver. D

Welch Allyn
4341 State Street Road
Skaneateles Falls, NY
13153 USA

Printed in USA

REP

European Regulatory Manager
Welch Allyn Ltd.
Navan Business Park
Dublin Road
Navan, County Meath, Republic of Ireland
Tel.: +353 46 90 67700
Fax: +353 46 90 67755

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
SpO2 Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 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
Terms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Pneumatic test assembly setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Voltage Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Pressure verification test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

49
50
51
52

Contents

Welch Allyn Spot Vital Signs LXi

Blood pressure calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Functional tests. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Temperature Functional Check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Masimo SpO2 Functional Check. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Nellcor SpO2 Functional Check. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

54
56
58
61
61

7 - Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63
Performance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
SpO2 Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Mechanical . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Electrical . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Patents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Battery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Environmental. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Radio. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Guidance and Manufacturer’s Declaration For Spot Vital Signs LXi Radio . . . . .

63
65
67
67
67
67
67
68
69

8 - Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73
Error Codes. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Radio Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Service Work Checklist . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Radio Configuration Utility . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

73
83
84
85

9 - Supplies and Accessories. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 87
Blood Pressure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Pulse Oximetry . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Miscellaneous. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Service Contracts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

87
88
89
92
94

10 - Field Replaceable Units. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 95
11 - Disassembly and Repair . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 101
Tool list . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Key Pad Disassembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
SpO2 Circuit Board Disassembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Blood Pressure Circuit Board Disassembly . . . . . . . . . . . . . . . . . . . . . . . . . . .
LCD Inverter Ballast Board Disassembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
LCD Disassembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Pump Disassembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
RS232-Communication Circuit Board Disassembly . . . . . . . . . . . . . . . . . . . . .
Fan and Power Circuit Board Disassembly . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Thermometry Circuit Board Disassembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

101
105
106
108
109
109
110
110
111
111

Service Manual

Contents

12 - Repair Test Specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 115
General Unit Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Temperature Option Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
SpO2 Option Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Fail Safe Test. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

115
116
117
117

Contents

Welch Allyn Spot Vital Signs LXi

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 ensure data integrity, save readings and clear the Spot Vital Signs
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.

Safety Summary

Welch Allyn Spot Vital Signs LXi

WARNING To ensure patient safety, use only accessories and supplies (i.e.,
cuffs, hoses, temperature probes, SpO2 sensors, 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 water or other fluid from entering any
connectors on the device. Should this occur, dry 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 SpO2 finger 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

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.

Safety 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

Braun Thermoscan PRO 4000
These warnings are specific to the Braun ThermoScan PRO 4000 thermometer option.
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.

SpO2 Warnings
These warnings pertain to the Spot Vital Signs LXi SpO2 feature.
WARNING Only use Spot Vital Signs LXi with Masimo or Nellcor SpO2 option
with Masimo or Nellcor brand sensors and accessories, respectively. Using the
wrong or unapproved sensors or cables may cause improper performance.
WARNING The SpO2 sensor 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 SpO2 sensor 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 SpO2 readings 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 SpO2 in the Spot Vital Signs LXi device is not intended for use
as an apnea monitor.
WARNING Consider the SpO2 an 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.

Safety Summary

Welch Allyn Spot Vital Signs LXi

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.

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.
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

Blood Pressure Cautions
These cautions pertain to the Spot Vital Signs LXi blood pressure feature.
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
1.80 mmHg (.2 kPa) from the displayed reading for every inch (2.5 cm) below
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.

Temperature Cautions
These cautions pertain to the Spot Vital Signs LXi temperature feature.
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.

SpO2 Cautions
These cautions pertain to the Spot Vital Signs LXi SpO2 feature.
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.

Safety 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.
•

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 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 staticshielding 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

Symbols
The following symbols are associated with the Spot Vital Signs LXi.

Safety Symbols
Identifies information within the
manual to avoid injury.
Caution: consult accompanying
documents

Identifies information within the
manual to avoid equipment failure.
Pb

Internally Powered, Lead Acid
Battery

Handle with Care

Transport Temperature

Storage Humidity

Recycle

Class II Equipment

IPXØ

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

Button Symbols
Navigation Buttons

Blood Pressure

Select

MEM

Memory

Power On/Off

Connection Symbols
USB Connection

Serial Port Connection

Safety Summary

Welch Allyn Spot Vital Signs LXi

Agency Symbols
CERTIFIED TO:
CAN/CSA STD C22.2 NO. 601.1
C

166292

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.

0297
EC

REP

European Regulatory Manager
Welch Allyn Ltd.
Navan Business Park
Dublin Road
Navan, County Meath, Republic of Ireland
Tel.: +353 46 90 67700
Fax: +353 46 90 67755

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.
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.

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.

Overview

Welch Allyn Spot Vital Signs LXi

Miscellaneous Mounting Accessories
Wall Mount Kit
WALL MOUNT KIT
EF: 4701-62

aterial #: 711890 Rev. B

Attach bracket to wall before
assembling basket.

}
5

Welch Allyn is NOT responsible for the integrity of any wall
mounting interface. Ensure you are using the appropriate
hardware to mount the device to a surface. 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.

Service Manual

Overview

Mobile Stand Kit

Welch Allyn Spot Vital Signs LXi

Service Manual

Overview

Welch Allyn Spot Vital Signs LXi

Radio Mounting Accessory

A
2

B
1

3
5

Service Manual

Barcode Reader Mounting Accessory

Overview

Welch Allyn Spot Vital Signs LXi

Warranty
Spot Vital Signs LXi
Welch Allyn warrants that the Spot Vital Signs LXi Radio products meet the labeled
specifications of the products and will be free from defects in materials and workmanship
that occur within one year after the date of purchase.
The date of purchase is: 1) the date specified in our records if you purchased the Product
directly from us, 2) the date specified in the warranty registration card that we ask you to
send to us, or 3) the date of purchase of product from the authorized Welch Allyn
distributor as documented from a receipt from said distributor.
This warranty does not cover damage caused by: 1) handling during shipping, 2) use or
maintenance contrary to labeled instructions, 3) alteration or repair by anyone not
authorized by Welch Allyn, and 4) accidents.
If a Product or accessory covered by this warranty is determined to be defective because
of defective materials, components, or workmanship, and the warranty claim is made
within the warranty period described above, Welch Allyn will, at its discretion, repair or
replace the defective Product or accessory free of charge.
You must obtain a service notification number from Welch Allyn to return your Product
before you send it to Welch Allyn’s designated service center for repair. Contact Welch
Allyn Technical Support.
THIS WARRANTY IS IN LIEU OF ALL OTHER WARRANTIES, EXPRESS OR IMPLIED,
INCLUDING BUT NOT LIMITED TO THE IMPLIED WARRANTIES OF MERCHANTABILITY
AND FITNESS FOR A PARTICULAR PURPOSE. WELCH ALLYN’S OBLIGATION UNDER
THIS WARRANTY IS LIMITED TO REPAIR OR REPLACEMENT OF PRODUCTS
CONTAINING A DEFECT. WELCH ALLYN IS NOT RESPONSIBLE FOR ANY INDIRECT OR
CONSEQUENTIAL DAMAGES RESULTING FROM A PRODUCT DEFECT COVERED BY
THE WARRANTY.

Accessories
Refer to the manufacturer’s Directions for Use for the Masimo and Nellcor finger sensor
and cable warranty.
Refer to the Directions for Use provided with the Welch Allyn Blood Pressure Cuff for
warranty information.
The SureTemp Plus probe is covered by a one-year warranty and the SureTemp Plus probe
well is covered by a 90-day warranty against original defects in material and workmanship.
Probe covers are intended for single-use only.
The Braun ThermoScan PRO 4000 is covered by a three-year warranty against original
defects in material or workmanship.
The printer is covered by a one-year warranty against original defects in material or
workmanship.
The barcode scanner is covered by a five-year warranty against original defects in material
or workmanship.

Service Manual

Overview

Service
Caution Unauthorized repairs will void the warranty.

A Welch Allyn Service Center must perform all repairs on products under warranty.
Qualified service personnel or a Welch Allyn Service Center should repair products out of
warranty.

User Servicable Parts
For user servicable parts available see “Supplies and Accessories” on page 87.

Technical Assistance
If you have an equipment problem that you cannot resolve, call the Welch Allyn Service
Center nearest you for assistance. Technical service telephone support is available on
normal business days.
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.
Before returning a product for repair, you must obtain authorization from Welch Allyn.
Service personnel will give you a Service Notification number. Please note this number on
the outside of your shipping box. Returns without a Service Notification number will not
be accepted for delivery.

Field Replacement Units
See “Field Replaceable Units” on page 95.

Service Loaners
Service loaners are provided, on request, if a Welch Allyn Service Center provides repair
service. Loaners for products repaired while under the original warranty, or while under
service contract, are provided free of charge and are shipped within 48 hours of
notification of need.
For service repairs outside of warranty or contract, loaners are available for a nominal
charge and shipment is subject to availability. Loaners are shipped pre-paid; however, this
charge is added to the service charges.

Service Intervals
Verify Spot Vital Signs LXi on an annual basis for blood pressure, temperature, and SpO2
accuracy.

Overview

Welch Allyn Spot Vital Signs LXi

Spot Vital Signs LXi Configurations
Table 1. Available Versions of Spot Vital Signs LXi
REF

Description

450T0

SureBP with SureTemp Plus Thermometer

450E0

SureBP with Braun ThermoScan PRO 4000 Thermometer

45MT0

SureBP with Masimo SpO2 and SureTemp Plus Thermometer

45ME0

SureBP with Masimo SpO2 and Braun ThermoScan PRO 4000 Thermometer

45NT0

SureBP with Nellcor SpO2 and SureTemp Plus Thermometer

45NE0

SureBP with Nellcor SpO2 and Braun ThermoScan PRO 4000 Thermometer

Controls
Figure 1. Spot Vital Signs LXi Front Panel with SureTemp Plus Thermometer
SureTemp Plus
thermometer:
remove the probe to
take a temperature.
BP
SYS

127
73

4 WEST

mmHg

DIA

mmHg

TEMP

985

SpO2

AM
Reading

F
PULSE

/min

Removable probe
well: store the
temperature probe
here when not in use;
remove to clean or
replace to eliminate
cross-contamination.

Patient ID 0123456789
Weight
Pain
Clear
Height
Respiration
Send/Next Reading

Enter

Probe cover
storage area:
storage space for one
box of probe covers.

Navigation button: move
throughout the options in
the Navigation Window or
to increase/decrease
parameter units.

Select button:
accepts the current
option.

Power button: controls
power to the device.
Charging LED: indicates
when device is plugged in and
charging the battery.

Blood Pressure Start/Stop button:
initiates a new blood pressure cycle.
Pressing again aborts an active blood
pressure measurement.

Memory button:
recalls up to 50 most
recent readings.

Service Manual

Overview

Figure 2. Spot Vital Signs LXi Front Panel with Braun ThermoScan PRO 4000 Thermometer

BP
SYS

127
73

Braun ThermoScan PRO 4000
thermometer: store the probe
covers toward the back of the
thermometer housing; remove the
thermometer to access the covers.
4 WEST

mmHg

DIA

AM
Reading

mmHg

TEMP

985

SpO2

PULSE

/min

Patient ID 0123456789

Weight
Height
Respiration

Pain
Clear
Send/Next Reading

Enter

BR
AUn

Navigation button: move
throughout the options in
the Navigation Window or
to increase/decrease
parameter units.

Memory button:
recalls up to 50 most
recent measurements.
Charging LED: indicates
when device is plugged in
and charging the battery.

Power button: controls
power to the device.

Charging LED: indicates
the thermometer battery
is charging.
Select button:
accepts the current
option.

Blood Pressure Start/Stop button:
initiates a new blood pressure cycle.
Pressing again aborts an active blood
pressure measurement.

Overview

Welch Allyn Spot Vital Signs LXi

Display Window
Note

Before using Spot Vital Signs LXi for the first time, you must program an initial
configuration screen.

Press the Power button. The display window shows the initial configuration screen.

Figure 3. Initial Configuration Screen

Change Local Defaults Menu
Model No.: 45NTO
Serial No. 2005040004
Language:
BP Units:
Temperature Units:
Height Units:
Weight Units:
Date Format:
Date:
Time Format:
Time:

Select

2. Use the Select button to access the options and accept the entries, and use the
Navigation buttons to move through the menu.
3. The word “Exit” appears at the bottom of the list after you have programmed all
items in the menu. You must program all items before you can start to use the device.
4. Scroll to Exit and press the Select button to save the entries.

Service Manual

Overview

The liquid crystal display (LCD) may indicate any of the following: systolic blood pressure
(mmHg or kPa), diastolic blood pressure (mmHg or kPa), MAP (mmHg or kPa),
temperature (F or C), temperature mode, pulse rate, pulse signal level, SpO2 percent,
department location, date, time, record number, height (in or cm), weight (lb or kg),
respiration rate, pain level, connectivity signal strength, and battery charge level.
Figure 4. Display Window
Connectivity indicator: shows the
status of Spot LXi sending a wireless
reading.
Reading sent: indicates a
successful wireless send reading
attempt.
Reading not sent: indicates an
unsuccessful wireless send reading
attempt.

Systolic and Diastolic
display: if MAP is turned on,
the screen toggles between
the systolic and diastolic
values, and the word “MAP”
and the MAP value.

{

BP
SYS
mmHg

DIA

mmHg

127
73

SpO2 display: shows the
percent saturation of arterial
hemoglobin. For devices with
SpO2 only.
Navigation Window:
shows menu options, error
messages, or temperature
conversion.

Clock: shows the current time.

4 WEST

Reading number indicator:
shows what reading the device is
on. Spot Vital Signs LXi retains
up to 50 readings in memory.

AM
Reading

Battery level indicator: shows
the battery charge level.

{ 985
{
62
TEMP

Temperature display and
indicator: shows the
temperature in Fahrenheit or
Celsius.

Location identifier: shows
where the device belongs. If no
location is entered, this area
displays the date.

SpO2

{

PULSE

/min

Patient ID 0123456789
Weight
Pain
Height
Clear
Send/Next Reading
Respiration

Thermometer probe setting
indicators: shows temperature
mode. For devices with SureTemp
Plus thermometer only.
Thermometer probe setting
indicators: shows Monitor
Mode. For devices with SureTemp
Plus thermometer only.
Out-of-range indicator: shows
the patient’s temperature reading
above or below the measurement
range limits. For devices with
SureTemp Plus thermometer only.

Enter
Pulse Signal Bar Graph: shows
the strength of the pulses detected.

Pulse display: shows the pulse
rate.

Clinician ID icons:
The figure icon signifies that Spot
Vital Signs LXi requires the clinician to
enter the Clinician ID.
The check mark signifies Spot Vital
Signs LXi has recorded the Clinician
ID.
For devices with a bar code scanner
only.

Overview

Welch Allyn Spot Vital Signs LXi

Connections
Use the following instructions to connect the blood pressure hose, thermometer probe,
and optional attachments to the Spot Vital Signs LXi.
Figure 5. Spot Vital Signs LXi Side and Rear Panel Connections
Icon ID label
CTIONS
ort

56
MAT: 7039

SureTemp Plus thermometer
connection port (for units
with SureTemp Plus only)

SpO2 cable connection port
(for units with SpO2 only)
II
I

Port I for external
device connection

Blood pressure hose
connection port

DC power connection port

USB connection for PC
(behind plug)
Port II for external
device connection

Battery door
Mobile stand or wall
mount screw connection

Service Manual

Overview

Braun ThermoScan PRO 4000 Lock
Press the lock tab toward the Braun ThermoScan PRO 4000 thermometer until it clicks. To
release the housing, insert the lock release pin into the lock release hole until the lock tab
snaps back.
Figure 6. Spot Vital Signs LXi with Braun ThermoScan PRO 4000 Lock

Lock release pin
Lock tab
Lock release hole

Blood Pressure Hose and Cuff
Identify and have available the Spot Vital Signs LXi, blood pressure cuff, and the blood
pressure hose.
1.

Inspect the blood pressure hose; notice that one end has a single, gray connector
fitting and the other end has two white fittings.

2. Squeeze the side tabs on the gray connector and completely push the blood pressure
hose connector into the blood pressure hose connection port until it clicks into place
(see Figure 5 on page 24).
3. Twist the white connectors on the blood pressure hose and cuff connectors together.

Overview

Welch Allyn Spot Vital Signs LXi

Thermometer
Spot Vital Signs LXi is available with either the SureTemp Plus thermometer or the Braun
ThermoScan PRO 4000 thermometer.

SureTemp Plus
SureTemp Plus is available with two probes and matching wells; one for oral/axillary
temperatures (blue ejection button and probe well) and one for rectal temperatures (red
ejection button and probe well).
WARNING Always use a probe cover whenever coming into contact with a
patient.
Caution The SureTemp Plus feature only operates with the probe well in place.

Align the probe well with the tabs facing up and down into the round opening of the
SureTemp Plus housing on the right side of Spot Vital Signs LXi. Push it into place.

2. Align the temperature probe connector with the SureTemp Plus thermometer
connection port on the back of the Spot Vital Signs LXi (see Figure 5 on page 24). You
can only insert the connector into the port one way.
3. Press the tab on the connector and push it until it clicks into place.
4. Insert the temperature probe into the probe well.

Braun ThermoScan PRO 4000
Caution Do not use alkaline batteries in the Braun ThermoScan PRO 4000
thermometer.

Open the package of rechargable batteries and follow the installation guide provided.

2. Open the box of probe covers as directed on the box and slide the box into the metal
guides toward the back of the thermometer housing with the opening at the top and
perforation facing forward.
3. Hold the Braun thermometer at a 45° angle then insert the probe and the top of the
thermometer into the housing.
4. Lower the bottom portion of the thermometer into the housing until it snaps into
place. If you do not properly seat the thermometer, it could fall out of the holder and
become damaged.
5. Slide the thermometer housing into the thermometer slot on the right side of the
Spot Vital Signs LXi device.
6. Push the lock tab forward to prevent the thermometer housing from falling out of
Spot Vital Signs LXi (see Figure 6 on page 25).
To release the lock, insert the lock release pin into the lock release hole.

Service Manual

Overview

SpO2 Sensor
Spot Vital Signs LXi is available with a wide variety of SpO2 sensors and ships with a
reusable finger clip sensor.
1.

Align the shape and pin configuration of the extension cable connector to the SpO2
cable connection port on the left side of the Spot Vital Signs LXi device.

2. Push the connector firmly into the SpO2 cable connection port until you hear it click
into place (see Figure 5 on page 24).
3. Align the opposite end of the extension cable to the sensor cable connector and
firmly push them together.
Note

Use only Masimo or Nellcor SpO2 sensors and accessories with the Spot Vital
Signs LXi with Masimo or Nellcor configurations, respectively.

Radio
CTIO NS
ort

MAT: 70395

The Spot Vital Signs LXi
identifies which serial port to
use after activating the Radio
in the internal configuration
mode.
II

Welch Allyn offers two
different radios:
• 802.11 b radio and
• 802.11 a/b/g radio
Only use Welch Allyn
Radios

PO
LIN WER
CO K
MM

Quick Reference Card
Attach the Quick Reference Card to the Spot Vital Signs LXi handle, mobile stand, or wall
mount using the supplied plastic cable tie.

Overview

Welch Allyn Spot Vital Signs LXi

AC Power Transformer
Note

To assure proper electrical isolation, replace the AC power transformer/charger
using only the Welch Allyn specified part.

The operator can use the Spot Vital Signs LXi with AC or battery power (after charging the
battery).
1.

Insert the round transformer connector into the AC power connection port on the
back of the Spot Vital Signs LXi (see Figure 5 on page 24).

2. Insert the line cord into the line connector on the transformer then plug the power
cord on the transformer into the AC main power source to charge the battery.

Battery
Charge the battery for 6 hours before initial use. Charge the device an additional hour if it
includes a Braun ThermoScan PRO 4000 thermometer. If there is an external printer,
connect the printer to the Spot Vital Signs LXi, enable it in the Internal Configuration
Mode (see “Internal Configuration Mode” on page 30 if this is the first time you power on
the device, and then Table 7 on page 33), and then charge the Spot Vital Signs LXi for an
additional 6-8 hours.
While Spot Vital Signs LXi is charging, the charging LED (~) flashes and the battery level
indicator segments on the display continuously sequence. When the battery is fully
charged, the charging LED is solid and the battery level indicator is steady with all
segments continuously shown on the display.
If the device includes a Braun ThermoScan PRO 4000 thermometer, the charging LED
below the thermometer will illuminate orange as it is charging. When the battery is fully
charged, the LED will power off.
If the device has an external printer, the charging LED on the printer will flash orange and
green when Spot Vital Signs LXi is plugged into the AC main power source.
Note

There is no hazard associated with leaving the battery in the device, even if the
device is not used for long periods of time.

Functional Overview
This functional verification procedure helps to confirm the proper operation of the Spot
Vital Signs LXi and options. This procedure supports the requirements of routine
preventative maintenance. It is not necessary to disassemble the Spot Vital Signs LXi to
perform this procedure.
For the calibration procedures, see “Calibration and Verification” on page 49. If the Spot
Vital Signs LXi fails certain functional tests or a circuit board is replaced, the device may
require calibration. It is necessary to disassemble the Spot Vital Signs LXi for calibration.
Always perform this functional verification procedure after performing any calibration. This
procedure contains additional tests that are not included in calibration procedures.

Self Test
The Spot Vital Signs LXi performs a self-test each time the device is powered on. Press
the Power button to turn the device on or off. Upon each power up, the display lights up,
a beep sounds, and the Spot Vital Signs LXi displays the model and serial numbers. If the
internal self-check is successful, the display shows its normal functions (see Figure 4 on
page 23) with all values blank, and the device is ready for operation. If the self-check fails,
an error code is shown in the Navigation Window (see “Error Codes” on page 73).
Spot Vital Signs LXi automatically powers off when not used for 30 minutes.

Functional Overview

Welch Allyn Spot Vital Signs LXi

Internal Configuration Mode
You can change several device operating parameters in the Internal Configuration Mode.
When changed, these settings become the default power-up settings. You will also see
non-changeable device configurations for technical service purposes.
To Enter the Internal Configuration Mode:
1.

Turn the Spot Vital Signs LXi off.

2. Press and hold the Select and Power buttons for 5 seconds. The device enters the
Internal Configuration Mode and the Configuration Menu screen appears on the
display.
Figure 7. Internal Configuration Mode Menu

Configuration Menu
Version
Numbers

Manual
Parameters

Battery

External
Devices

Location
Identifier

Save Readings

Date/Time

Buttons
Lockout

Blood Pressure

Defaults

Temperature

Event Log

Contrast

Select
3. Use the Navigation buttons to move through the menu options and then press the
Select button to access the options or accept a change. See the following tables for
descriptions of the menu options.
4. Press the Power button to exit the Internal Configuration Mode.

Service Manual

Functional Overview

Table 2. Configuration Menu Options
Setting

Description

Version Numbers*

Displays the software and hardware version numbers in the Spot Vital Signs LXi device.

Battery*

Displays the battery level.

Location Identifier

Allows the entry of the device’s location (e.g., the department name). Follow the
display prompts and use the Navigation and Select buttons to enter up to 10
characters.

Date/Time

Changes the date and time formats or updates the actual date and time. See Table 3,
“Date/Time Menu Options” for available settings.

Blood Pressure

Changes the blood pressure options. See Table 4, “Blood Pressure Menu Options” for
available settings.

Temperature

Changes the temperature options. See Table 5, “Temperature Menu Options” for
available settings.

Contrast

Changes the Display Contrast options. Use the left/right navigation buttons to adjust.

Manual Parameters

Changes the manual parameters defaults. See Table 6, “Manual Parameters Menu
Options” for available settings.

External Devices

Enables or disables available external devices. See Table 7, “External Devices Menu
Options” for available settings.

Save Readings

Saves the current patient reading at a preselected time interval or upon request. See
Table 8, “Save Readings Menu Options” for available settings.

Buttons Lockout

Secures Spot Vital Signs LXi so unauthorized people cannot use the device or access
data without enacting the proper key sequence. To override the buttons lockout feature,
simultaneously press the Left Navigation button and the Select button.

Defaults

Allows the user to select the default settings for the device and reset the unit to the
default settings. See Table 9, “Change Local Defaults Options” for available settings.

Event Log*

Displays the recent button presses, errors, measurements, measurement sites, battery
state changes, and patient reading send events.

* Displayed information only; operator cannot change.

Table 3. Date/Time Menu Options
Setting

Description

Date Format

Displays the date in one of the following styles:
• mm/dd/yyyy example: July 16, 2005 = 07/16/2005
• dd/mm/yyyy example: 16 July 2005 = 16/07/2005

Date

Changes the date on the Display Window and in patient readings. If a location is
entered (see “Location Identifier “ in Table 2, “Configuration Menu Options”), the date
will not appear on the Display Window; the location will.

Time Format

Displays the time in one of the following styles:
• 12-hour example: 5:00 PM
• 24-hour example: 17:00

Time

Changes the time on the Display Window.

Functional Overview

Welch Allyn Spot Vital Signs LXi

Table 4. Blood Pressure Menu Options
Setting

Description

BP Calibration Check

Prepares the Spot Vital Signs LXi for calibration. Only qualified personnel should verify
the Spot Vital Signs LXi blood pressure calibration. For more details, see “Blood
pressure calibration” on page 54.

Blood Pressure Units

mmHg or kPa.

Mean Arterial Pressure (MAP) On or off.

Table 5. Temperature Menu Options
Setting

Description

Temperature Units

Fahrenheit (°F) or Celsius (°C).

Temperature Mode

SureTemp Plus models only: Oral, Pediatric Axillary, Adult Axillary, and Last Mode. In
Last Mode the device takes the next temperature in the mode in which the previous
temperature was measured. Rectal Mode is available only when the rectal probe (red
ejection button) and probe well are attached.

Table 6. Manual Parameters Menu Options
Setting

Description

Height

On or off.

Height Units

Inches (in) or centimeters (cm).

Height Default

Changes the default patient height displayed in the Navigation Window.

Weight

On or off. Even if weight is enabled here, if weight scale is enabled in the External
Devices Menu, you cannot manually enter the weight.

Weight Units

Pounds (lb) or kilograms (kg).

Weight Default

Changes the default patient weight displayed in the Navigation Window.

Respiration

On or off.

Pain Level

On or off.

Service Manual

Functional Overview

Table 7. External Devices Menu Options
Setting

Description

Information System

On or off. You must enable this option to send patient readings wired or wirelessly.

Barcode Patient ID

On or off. You must enable this option to send patient readings wirelessly.

Barcode Clinician ID

On or off. You must enable this option to require mandatory sign in of a clinician.

Mandatory Sign In

Yes or no. You must enable this option to require the sign-in of the clinician.

Clear on Send/Save:

Yes or no. You must enable this option to clear the Clinician ID after after sending or
saving the measurements.

Clear on Power Cycle:

Yes or No. You must enable this option to clear the Clinician ID after powering the Spot
Vital Signs LXi off.

Weight Scale

On or off. Spot Vital Signs LXi connects to a scale and the weight shows on the display
window (see “Spot Vital Signs LXi Technical Overview” on page 35 for scale details).

Wireless Module

None or 802.11 B. You must enable 802.11 B to send patient readings wirelessly. The
radio is available as an accessory only with Welch Allyn Connex.

Printer

On or off.

Printer Paper

Plain or labels. Only available if the Printer is enabled.

Table 8. Save Readings Menu Options
Setting

Description

Save Mode

Manual or automatic. If automatic, Spot Vital Signs LXi saves readings at a preselected
time interval. For either option, Spot Vital Signs LXi automatically saves the measured
parameters into memory before automatically powering off when not used for 30
minutes.

Auto Save Interval

Changes the amount of time before automatically saving the current patient reading.
Only available if Automatic Save Mode is enabled.

Reading Full Action

Auto Overwrite, Ask Overwrite, Do not Overwrite. Spot Vital Signs LXi can save 50
patient readings in memory. Upon reaching reading 51, the device may automatically
overwrite reading 1, ask the user if he/she wants to overwrite reading 1, or disable the
ability to take another reading until at least one reading is erased.

Table 9. Change Local Defaults Options
Setting

Description

Language

English, Dansk, Nederlands, Suomi, Français, Deutsch, Italiano, Norsk, Español,
Português, Svenska, or Chinese.

BP Units

mmHg or kPa.

Temperature Units

Fahrenheit (°F) or Celsius (°C).

Height Units

Inches (in) or centimeters (cm).

Weight Units

Pounds (lb) or kilograms (kg).

Date Format

Displays the date in one of the following styles:
• mm/dd/yyyy example: July 16, 2005 = 07/16/2005
• dd/mm/yyyy example: 16 July 2005 = 16/07/2005

Time Format

Displays the time in one of the following styles:
• 12-hour example: 5:00 PM
• 24-hour example: 17:00

Functional Overview

Welch Allyn Spot Vital Signs LXi

Spot Vital Signs LXi Technical
Overview

System Description
The Spot Vital Signs LXi automatically measures systolic and diastolic pressure (excluding
neonates), pulse rate, temperature (oral, adult axillary, pediatric axillary, rectal, and ear),
and pulse oximetry (SpO2) as well as calculates Mean Arterial Pressure (MAP).
Furthermore, Spot Vital Signs LXi allows the entry of height, weight, respiration rate, and
pain level. Spot Vital Signs LXi also calculates Body Mass Index (BMI) following height and
weight entry.
The device is intended to be used by clinicians and medically qualified personnel. It is
available for sale only upon the order of a physician or licensed health care provider.
Refer to the Spot Vital Signs LXi Directions for Use manual for complete information.

Battery System
Spot Vital Signs LXi includes a 6 Volt, 6 amp-hour sealed lead-acid battery that supplies all
power to the device. An external power supply charges the battery. The battery is always
on-line (floated) rather than switching out when attached to the external power supply.
Spot Vital Signs LXi uses a fuse and a shunt diode for protection against reverse battery
connections. The fuse is located on the main board in the negative battery line and a
reverse battery connection causes it to blow and require repair. The negative line location
is more likely to short the battery (+) wire to ground than short the battery (-) wire to the
VBUS node.

Battery Charger
Provides two levels of power to fast-charge or to float the battery at fixed voltages using
software control. The fast-charge level rapidly brings the battery up to near-full capacity (7
Volts) using software to not overcharge the battery. The float level, set per the
manufacturer’s recommendation, slowly tops-off the battery and can stay on indefinitely.

“CPU I/O” Power Supply
Provides power to the I/O pins of the DragonBall MPU and the attached peripheral IC’s.
The nominal voltage is set to a value of 3.15 Volts so that both the 3.0 Volt MPU and 3.3
Volts peripherals can operate within specifications. Spot Vital Signs LXi uses buck
switching topology for efficiency and an on-off power latch directly controls the power
supply.

Spot Vital Signs LXi Technical Overview

Welch Allyn Spot Vital Signs LXi

Standby Mode
The Standby Mode conserves battery power. The device goes into Standby Mode if it is
not used for two minutes. Press any button to bring the Spot Vital Signs LXi out of
Standby Mode.

CPU Core Power Supply
Powers the MPU core only and operates at the recommended Dragonball voltage range
of 1.8 +/- 0.1 Volts; 2.0 Volts absolute max.
The +3.15 Volt supply powers the +1.8 Volt supply for efficiency and, more importantly, for
power sequencing. During power-on the +1.8 Volt supply cannot exceed the +3.15 Volt
supply. The R207/C182 further delays the +1.8 Volt supply. During power-off, D106
prevents the +1.8 Volt supply from exceeding the +3.15 Volt supply by more than a partial
diode drop.

+5V Supply
Provides supply to miscellaneous loads that require more than 3.15 Volts. The Power
Latch controls the supply and the average load current is small, so efficiency is not
important.

Clock/Calendar Power
The Clock/Calendar U19 receives power from two sources. During power on the clock
runs from the +5 Volt supply and during power down the clock receives power directly
from the battery potential using a voltage divider. Capacitor C131 provides power to the
U19 during the battery exchanges. Zener D102 prevents overvoltage to U19 in the case of
operation directly from the charger.

Mod F NIBP Power
This module is powered directly from VBUS through an EMI filter. Software via BP-PWRON-BAR controls the power. Level shifter Q115 / Q104 assures that the module remains
off when the MPU is unpowered.

SpO2 and Thermometer Power
A common structure supplies SpO2 and thermometry. A single push-pull driver delivers
squarewave power to a pair of isolation transformers, one for SpO2 and the other for
thermometry. THERM-PWR-BAR activates the driver under software control. Level
shifter Q118, Q119 assures that the module remains off when the MPU is unpowered.
In the push-pull (forward) configuration, VBUS is multiplied by the transformer turns ratio
and supplied to the input of the rectifier diodes. This is filtered and passed through lownoise 5-Volt linear regulators to supply power to the parameter modules.

LCD Power
The LCD data interface connects directly to the +3.15 Volt MPU I/O power supply. This
powers the driver ICs inside the LCD pane and assures the data interface to the LCD is
always powered when the unit is powered.

Service Manual

Spot Vital Signs LXi Technical Overview

The contrast (bias) supply to the LCD panel and the LCD CCFL backlight both derive
power indirectly from a pre-regulator. A software control can shut down the pre-regulator.
For efficiency, it is implemented as a buck switcher operating directly from the battery.
The primary purpose of the pre-regulator is to protect the backlight inverter / ballast from
battery voltages that it cannot tolerate and to control current out of the unregulated
ballast. The voltage is set to the low side of 5 Volts to reduce battery consumption, while
still driving the CCFL with adequate voltage.

External Load (RS-232) Power
There are two power outlet means on the Spot Vital Signs LXi – RS-232 port power and
the Braun PRO 4000 charger.
Two isolated power supplies provide power to each of the external RS-232 ports. This
power is available to external devices on pin 9 of each serial connector whenever the
software enables the corresponding RS-232 port.

SureTemp Plus Thermometer Interface
The SureTemp Plus OEM module is located in an optional pod and is connected to the
main PCB via a flex cable.The Thermometer Probe connection is located on a separate PC
board. It is connected to the SureTemp Plus OEM module by a ribbon cable. The
electrical interface to the thermometer pod is a 6-pin ribbon connector, Molex 52271-0690
or equivalent.

Braun ThermoScan PRO 4000 Thermometer Interface
The interface to the Braun ThermoScan PRO 4000 thermometer is located in the optional
pod and connects to the main PCB via a flex cable. The communications link is a single
duplex current loop that also charges the Braun battery pack.
The presence or absence of current passing through the Braun ThermoScan PRO 4000
charge contacts controls the interface charge LED, located within the pod, which mimics
the Braun ThermoScan Pro 4000 Base Station (type 6021).

SpO2 Description
A shielded flat-flex cable connects the user interface sensor connector J8 to the SpO2
electronics.
The Masimo SpO2 module mates to the Masimo Adaptor Board that, in turn, mates to the
Main board. This provides power and communications to the module from the Main
board.
The Nellcor SpO2 module mounts directly to the Main board. This provides power and
communications to the module, and brings the sensor signals to the main board where
EMI and ESD can be controlled. The sensor signals pass through the main board to the
mating connector for the shielded flat-flex cable.

Spot Vital Signs LXi Technical Overview

Welch Allyn Spot Vital Signs LXi

Radio Description
For radio description, refer to the manufacturer’s Directions for Use.
The radio interfaces to the Spot Vital signs LXi through an RS-232 female connector with a
9-pin male/female null modem connection.
Figure 1. 9-pin Null Modem Pinout
MA 0051 (DB9M/F) Adapter Pin out:
09 Male

09 Female

1+6

Bar Code Scanner Description
The Spot Vital Signs LXi has a 2D scanner (IMAGETEAM™ 4600). This scanner is
programmed specifically for Welch Allyn. Scanners not purchased through Welch Allyn
will not work with the Spot Vital Signs LXi.

4600SF031C Settings
Parameter

Setting

Factory Default

9600

38400

Data Bits:

Stop Bits:

Parity:

Even

None

Handshaking:

None

Beeper - Good Read:

Off

Beeper Volume - Good
Read:

Off

Medium

Manual Trigger, Low Power

Manual/Serial Trigger

5 seconds

Terminal Interfaces:
Baud Rate:

Output:

Trigger Mode:
Lower Power Time Out:

Service Manual

Spot Vital Signs LXi Technical Overview

Parameter

Setting

Factory Default

Prefix1:

(Ctl-BAR)

None

Suffix1:

Data Editing:

NOTES:
1. Applies to all symbologies.
2. Select the he prior to revising the Terminal Interface parameters.

Output Format
The data accepted as a valid bar code reading consists of an ASCII text string composed
of three elements: the prefix, the message consisting of the bar code data, and the suffix.
The format of the string is as follows:
“AA...AA(CR>”
where:
Field

Description

STX

Start of Text character, 0x02.

SOH

Start of Header character, 0x01.

DC2

Device Control 2 character, 0x12.

Message data consisting of alpha-numeric chacters in the range
0x20 through 0x7E. The message length can range from 0 to 20
characters.

Carriage return character, 0x0D.

Line feed character, 0x0A.

Note

Spot Vital Signs LXi issues a single beep for valid bar codes and displays the
message scanned in on the units display. If a bar code is invalid, Spot Vital
Signs displays nothing.

2. Spot Vital Signs LXi treats bar codes longer than 20 characters as invalid.
3. Spot Vital Signs LXi checks the parity bit of every character received. If a
parity error is detected in the preamble, Spot Vital Signs LXi ignores the
remainder of the bar code (no beep issued). If a parity error is detected in
the message data or suffix, Spot Vital Signs LXi treats the bar code as
invalid.
4. Refer to the bar code scanner manual for a list of supported symbologies.

Interface
The bar code scanner interfaces to Spot Vital Signs LXi through an isolated RS-232 DB-9
female connector. A started 4600SF031C cable (Part #42204253-01 RS232, 9PIN D, HHP
0204 REF F) is required for use with the scanner.

Spot Vital Signs LXi Technical Overview

Welch Allyn Spot Vital Signs LXi

Printer Description
All models of the Ap1300 printer use an industry standard RS-232 interface. The default
parameters are 9600 baud, 8 data bits, 1 stop bit, and no parity.
Serial data is expected in standard RS-232C format with -12 Volt meaning ‘mark’ or ‘1’ and
+12 Volt a logical ‘0’, with reference to the common ground. The serial data output line,
TxD, transmits XON/XOFF and status information to the host at the same Baud rate and in
the same format as the serial data input. The hardware busy line is true (nominal -12 Volt)
when busy. Both serial output lines will relax to approximately 0 Volt when the Ap1300 is
in sleep mode and the user must allow a short period after awakening before relying on
the values of these signals.
The Ap1300 has three operating modes, when not actually printing.
Idle Mode

Ready to accept data, but no data are in the buffer
awaiting printing and the printer motor is not running.

Sleep Mode

Effectively switched off.

Spool Mode

Active, but storing data for later printing.

Different color combinations on the front-panel LED indicate the modes. No light is
emitted in sleep mode.
Table 1. LED Pattern Table
Pattern

Battery

Buffer Mode

Constant Green

Running

Normal

Fast Flashing Green

Running

Spool *

Long Green - Short Red

Battery Low

Normal

Short Green - Short Red

Battery Low

Spool *

Short Green - Long Orange

Trickle Charging

Normal

Long Orange Flash

Trickle Charging

Spool *

Fast Flashing Orange

Fast charging

Spool (Printing prohibited)

Fast Flashing Red

Error Condition

Spool (Printing prohibited)

No Light

Flat or in sleep mode

* Spool may have resulted from Paper Out or Head Up conditions)

No hardware power switch is fitted, as power control is either automatic or by command
from the host computer. To save power, the printer enters sleep mode after a period of
inactivity, factory-set to 30 seconds, but prorammable from the host. It can also be
programmed to stay idle indefinitely or to go to sleep on command.
The Ap1300 utilizes Fujitsu FTP-628MCL 103 printer mechanism, with a fixed (parallel)
print head with 384 horizontally-arranged thermal elements. A stepper motor advances
the paper and the printing takes place in a single-dot row for each step of the paper. Each
printed dot is approximately 1/8 mm square. The printing speed and dot density are
controlled according to the battery voltage and the head temperature.
The Spot Vital Signs LXi provides two levels of power to fast-charge or to float the battery
at fixed voltages using software control. The fast-charge level rapidly brings the battery

Service Manual

Spot Vital Signs LXi Technical Overview

up to near-full capacity (7 Volts) using software to not overcharge the battery. The float
level, set per the manufacturer’s recommendation, slowly tops-off the battery and can
stay on indefinitely.

Spot Vital Signs LXi Technical Overview

Welch Allyn Spot Vital Signs LXi

Interconnect Diagram
Item

Description

Item

Description

PCA, Main, Spot Vital Signs LXi

Assy, Power Harness, Spot Vital Signs LXi

A1-F1

Fuse, FlastBlo, 5A

W1-A1

PCA, Power Interface, Spot Vital Signs LXi

PCA, Serial Interface, Spot Vital Signs LXi

Flex, Main, Spot Vital Signs LXi

Display, LCD, 320 x 240, Mono

Cbl Flx, 1/2mm, 15 POS

Inverter, LCD

Assy, Ballast Harness, Spot Vital Signs LXi

Assy, Battery, Spot Vital Signs LXi

Assy, LCD Gnd Harness

A5-F1

Wire Protection Fuse

Assy, Cable, Flat Flex, SpO2

Assy, Fan Unit Cooling

Wire Clip, Side Entry, .375 Wide

PCA, Masimo Adapter, Spot Vital Signs LXi

Foam Strip, 2 Sided Adhesive

Masimo MS-11 SpO2

Cbl, Flx, 1mm, 6POS

Shield, Masimo EMI

Cbl, Flx, 1mm, 8POS

Tape, Copper, Masimo Shield

Cbl, Flx, Braun, Spot Vital Signs LXi

PCA, SureTemp Plus, OEM w/o EDAC

A10

PCBA, BP OEM, (MOD F)

A11

Assy, Pump, and Tubing, Spot Vital Signs
LXi

A11-F1

Filter, Air, 1/8 Barbs

A12

Assy, Transducer Tubing, Spot Vital Signs
LXi

A13

PCA, EDAC, Spot Vital Signs LXi

A14

Nellcor MP506 SpO2 PCB

A15

PCA, Braun Interface, Spot Vital Signs LXi

Wire Color
BLK

Black

BRN

Brown

RED

Red

ORN

Orange

GRN

Green

BLU

Blue

PNK

Pink

WHT

DGND

A5
BATTERY
-

J108
SERIAL
INTERFACE

+5LCD

J107
BACKLIGHT
DGND

SERA-PF-BAR
SERA-EN

SERA-RXE
SERA-TX-BAR

LCD-VDD
LCD-LACD
LCD-LSCLK DGND
LCD-LP
LCD-FLM

SERA-RTS-BAR

+ 1

GRN

SERB-RXE

BLK
C

USB-SUSPND

1
SER-GND

RED

+
ORN

WHT

D107

A1-F1
FUSE 5A

CHG-IN
CHG-GND

+3.15V
DGND

A1-J5
JTAG
2
4
6
8
10
12
14
16
18
20

J104
POWER
W1-A1-JP2

Ferrite
+

USB-VM

+3.15V

1
3
5
7
9
11
13
15
17
19

15
16

MNT10

26
USB-VPO

USB-VMO

J103
THERMOMETER

MNT4
1

GND-ZBI
MNT5

P102

RTS

TXD

CTS

DTR

ZC+5V

J1
SERIAL I

J10

GND-ZD

DTE

1
2
3
4
5
6
7
8
9
10

W6
SPO2 FPC ASSY

J8
SPO2
Mini-D

GND-ZBX

P101

MNT24

RED-C

MNT21

A8-J3

IR-C

+5VA

1
2
3
4
5
6
7
8
9
10

MNT23

J90

SENSOR
ANODE
CATH
INNER
INNER

CONTROL

A10-P6
SENSOR

1
2
3
4
5
6
7
8
9
10

A10-J81
VALVE

MASIMO
ADAPTOR BOARD

W7
FFC

RST
DAV
RX
TX

NIBP BOARD

ANODE
CATH
INNER
INNER
DIGI-CAL
OUTER
LED(1)
OUTER
LED(8)
DIGI-GND

LED (1)

MNT6

A10

A10-J80
PUMP

RXD

J6 P6
SPO2 SENSOR

Cut out for MS-11

LED (8)

GND-ZC

A1-JP2
0
1

J101
SENSOR

DET+
GND-DIGI
DIGICAL
DETINNER

GND-ZB

BLU

DSR 6

1
2
3
4
5
6
7
8
9
10

MNT9

MNT7

J3
USB
DEVICE

DCD 1

C-LOCK
1
2
3
SPO2I-RESET-BAR
4
5 +12V
6 ANA-OUT
7
SPO2I-TX
8
SPO2I-RX
9 +5VA
10 CTS-BAR
11
12 +5VD
13
14

RX
TX
HOST-WAKEUP-BAR
RESET-BAR
GND
POWER

HOST_TX
VBUS
GND
HOST_DSR
HOST_RX
GND
PWR_ON
ECG_SYNC

DGND

1
2
3
4
5
6
7
8

MNT8

DTE

USB-RCV

J102
SPO2 CONTROL

J105
NIBP CONTROL

POWER
INTERFACE
BOARD

DGND

FAN

ZC+5V

J2
SERIAL II

SERIAL
INTERFACE
BOARD

S3
RESET

FAN

W1-A1

GND-ZE

6
5
4
3
2
1

W1-A1-J3

FFC

BLK

DTR

RED

CTS

DGND

TXD

NOPOP

center = +
1

RTS

19
USB-VP

4
5

USB-OE-BAR

BAT-GND

SERB-RTS-BAR

A5-F1

SERB-CTS-BAR

RXD

SERB-EN

BLU

+5V

SERB-PF-BAR

VBUS

BAT-IN

DSR 6

SERB-TX-BAR

RED

DCD 1

+HST-IF

SER-SYNC

MAIN
BOARD

GND-IO

J11
VBUS
POWER

LCD-VEE

1
2

SERA-CTS-BAR

USB-ID-BAR
BLK

J4
CHARGER

DGND

W1
POWER HARNESS

Ferrite

VBUS-IO

DGND

LCD-D0
LCD-D1
LCD-D2
LCD-D3

J110

J106
LCD

BATTERY

Pinout on LCD is
reversed from
standard Molex
assignment.

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15

INVERTER /
BALLAST

LCD

RED
BLK

CN1
1 1
2

CN2
PNK

5
4
3
2
1

W3
FFC

FRM
LOAD
CP
DISP-ON
VDD
VSS
VEE
D7/NC
D6/NC
D5/NC
D4/NC
D3
D2
D1
D0

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15

GRN

A13

J5
SURETEMP
PLUS
PROBE

THERMOMETER
INTERFACE
(EDAC) BOARD

MNT22

A8-J1

RED

BLK

MASIMO SPO2
BOARD
Shield

A11
A11-F1

PUMP &
TUBING

A12

TRANSDUCER
TUBING

FILTER

A9-J1
CONTROL
6

SURE TEMP
PLUS OEM
BOARD

A9-J3
PROBE
8
7
6
5
4
3
2
1

W8
FFC

PRODUCT ENCLOSURE
BLOOD
PRESSURE
CUFF

THIS INFORMATION IS THE
PROPERTYOF WELCH
ALLYN. IT IS SUBMITTED IN
CONFIDENCE AND IS NOT
TO BE DISCLOSED OR
UTILIZED WITHOUT
WRITTEN PERMISSION.

APPROVALS
CHECK
PROJ. MGR.

DATE
-

WELCH ALLYN
TITLE

Spot Lxi Interconnect Diagram

Source document:

40700-HDD

SIZE

NUMBER

REV

Note: This page depicts interconnect for basic unit plus Masimo
SPO2 and SureTemp Plus Thermometer options.

PCB Mat'l # (ref)

DATE 12/6/05

PCA Mat'l # (ref)

DRAWN BY
1

SHEET 1 of 2

K Burdick

DGND

J110

5
4
3
2
1

DGND

LCD-D0
LCD-D1
LCD-D2
LCD-D3

DGND

J107
BACKLIGHT

J108
SERIAL
INTERFACE

+5LCD

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15

DGND

SERA-PF-BAR
SERA-EN

SERA-RXE
SERA-TX-BAR

LCD-VDD
LCD-LACD
LCD-LSCLK DGND
LCD-LP
LCD-FLM

SERA-RTS-BAR

7
8
9

SERB-EN

SERB-RXE

USB-ID-BAR
VBUS
USB-SUSPND

BAT-GND

15
16
17
18
19

CHG-IN

A1-F1
FUSE 5A

D107
USB-VP

4
5

USB-OE-BAR

SER-GND

12
13

SERB-RTS-BAR

10
11

SERB-CTS-BAR

SERB-TX-BAR

BAT-IN

+5V

SERB-PF-BAR

+HST-IF

SER-SYNC

MAIN
BOARD

3
4

LCD-VEE

J106
LCD

1
2

SERA-CTS-BAR

CHG-GND

+3.15V
DGND

J5
JTAG
2
4
6
8
10
12
14
16
18
20

J104
POWER

20
21

USB-VM

+3.15V

1
3
5
7
9
11
13
15
17
19

22
23

S3
RESET

USB-RCV

24
25

26
USB-VPO

USB-VMO

NOPOP
DGND

29
30
DGND

MNT9
MNT10

J103
THERMOMETER

MNT4

J101
SENSOR

J6
SPO2 SENSOR
ANODE
CATH
INNER
INNER
DIGI-CAL
OUTER
LED(1)
OUTER
LED(8)
DIGI-GND

LED (1)

LED (8)

Cut out for MS-11

MNT6

GND-ZBI
MNT5

1
2
3
4
5
6
7
8
9
10

W6
FPC

J8
SPO2
Mini-D

GND-ZBX

A14-J2
CONTROL

DET+
GND-DIGI
DIGICAL
DETINNER

GND-ZC

A1-JP2
0
1

1
2
3
4
5
6
7
8
9
10

RX
TX
HOST-WAKEUP-BAR
RESET-BAR
GND
POWER
6
5
4
3
2
1

HOST_TX
VBUS
GND
HOST_DSR
HOST_RX
GND
PWR_ON
ECG_SYNC
MNT7

1
2
3
4
5
6
7
8

MNT8

DGND

GND-ZB

C-LOCK
1
2
3
SPO2I-RESET-BAR
4
5 +12V
6 ANA-OUT
7
SPO2I-TX
8
SPO2I-RX
9 +5VA
10 CTS-BAR
11
12 +5VD
13
14

J102
SPO2 CONTROL

J105
NIBP CONTROL

A14-J1
SENSOR

A14
W9
FFC

NELLCOR
SPO2
BOARD

A15-J1
CONTROL

A15

A15-J2
WELL
CONTACTS

BRAUN
INTERFACE
BOARD

CHG/DATA
GND

2
1

Note: This page depicts interconnect for Nellcor SPO2 and Braun
Thermometer options only.

PRODUCT ENCLOSURE
A

THIS INFORMATION IS THE
PROPERTYOF WELCH
ALLYN. IT IS SUBMITTED IN
CONFIDENCE AND IS NOT
TO BE DISCLOSED OR
UTILIZED WITHOUT
WRITTEN PERMISSION.

APPROVALS
CHECK
PROJ. MGR.

DATE
-

WELCH ALLYN
TITLE

Spot Lxi Interconnect Diagram

Source document:

40700-HDD

SIZE

NUMBER

REV

PCB Mat'l # (ref)

DATE 12/6/05

PCA Mat'l # (ref)

DRAWN BY
1

SHEET 2 of 2

K Burdick

Maintenance and Service

Cleaning
WARNING Before performing any maintenance or service to the Spot Vital
Signs LXi, disconnect the AC power line from the electrical outlet.

Spot Vital Signs LXi
Caution Prevent water or other fluids from entering any connectors. If the
connectors get wet, dry them with warm air. Check all measurement functions.
Caution Do not sterilize or autoclave the Spot Vital Signs LXi device.

As necessary, clean the device with a cloth slightly dampened with either 70% isopropyl
alcohol, 10% chlorine bleach solution, or mild detergent in water, or use PDI Sani-System
Cloths. Never immerse Spot Vital Signs LXi in any type of fluid.

Blood Pressure Cuff
Before washing the Reusable Two-Piece Cuff, remove the two connectors and bladder,
close off tubes with plugs (available as accessory 5082-163), and close the hook and loop
fasteners. After washing, allow the cuff to air dry. Re-assemble the tube fittings.
Never press with an iron.

Blood Pressure Hose and Cable
Wipe the pressure hose with a damp cloth moistened in a mild detergent solution. Do not
immerse hose.

Maintenance and Service

Welch Allyn Spot Vital Signs LXi

SureTemp Plus Thermometer
Temperature Probe
Caution DO NOT immerse or soak the probe in any type of fluid.
Caution DO NOT use steam, heat, or gas sterilization on the probe.
Caution DO NOT autoclave the probe.

Press down on the connector tab and slide the connector out of the port to remove the
temperature probe.
Regularly wipe the probe with a cloth dampened with warm water and a mild detergent
solution, a 70% isopropyl alcohol solution, or a 10% chlorine bleach solution.

Removable Probe Well
Caution DO NOT use hard or sharp objects to clean the probe well. This could
damage the probe well and cause the device to not function properly.
Caution DO NOT use steam, heat, or gas sterilization on the probe well.
Caution DO NOT autoclave the probe well.

Remove the temperature probe from Spot Vital Signs LXi (see “Temperature Probe”
on page 44).

2. Grasp the well under the probe opening and pull up gently to remove it from the
device.
3. Swab the inner and outer surface of the probe well with a cloth dampened with a mild
detergent solution, 70% isopropyl alcohol, or 10% chlorine bleach solution. Immerse
the probe well in mild detergent solution as necessary for cleaning.
4. Dry all surfaces thoroughly before re-assembling the device (see “SureTemp Plus” on
page 26) for reassembly instructions.

Braun ThermoScan PRO 4000 Thermometer
Use a soft cloth slightly moistened with alcohol to clean the thermometer display and
exterior. Do not use abrasive cleaners.
Damage to the probe window or the presence of dirt or cerumen on the probe window
can affect the accuracy of your temperature measurement. To clean the window, gently
wipe it with a cotton swab slightly moistened with alcohol and immediately wipe dry with
a clean cotton swab. Allow to dry at least five minutes before taking a temperature.
Every month, clean the Braun ThermoScan PRO 4000 charging contacts within the Spot
Vital Signs LXi housing with a swab slightly dampened with alcohol.

Service Manual

Maintenance and Service

SpO2 Sensors
WARNING Do not immerse the sensor in water, solvents, or cleaning solutions
(the sensors and connections are not waterproof). Do not use irradiation, steam,
or ethylene oxide for sterilization.
Clean the reusable SpO2 sensor with a 70% isopropyl alcohol solution. Do not immerse
the sensor.

Radio
Refer to Manufacturer’s Directions for Use.

Printer
The printer label kit comes with a two-step head cleaner. Follow the directions provided
with the cleaner.

Maintenance and Service

Welch Allyn Spot Vital Signs LXi

Battery Replacement
Spot Vital Signs LXi
Caution Only use the Welch Allyn 4500-84 lead acid battery. Using an incorrect
battery will cause damage to the Spot Vital Signs LXi and void the warranty.
Caution Do not break the shrinkwrap around the battery.
If necessary, replace the internal battery after heavy use or the battery no longer charges.
1.

Power off the Spot Vital Signs LXi and disconnect the AC power transformer cord.

2. Remove the four screws holding the battery door using a phillips-head screwdriver.
Remove the battery door to expose the battery.
3. Tip the Spot Vital Signs LXi backward and slide the battery out. Disconnect the oneway connector and then attach a new battery to the connector as shown. The oneway connector ends only connect one way. Do this as quickly as possibly to prevent
loss of clock time.
Figure 1. Battery Removal and One-way Connector

One-way
connector

4. Slide the battery into the compartment as far as it will go. Push the connector down
into the case next to the battery.
5. Replace the battery door and tighten each of the four screws.
6. Connect the AC power transformer to the Spot Vital Signs LXi and allow the new
battery to charge for approximately 6 hours. The rechargeable batteries in the Braun
ThermoScan PRO 4000 thermometer requires an additional 1 hour to charge and the
rechargeable batteries in the external printer require an additional 4 hours to charge.
You can use the Spot Vital Signs LXi during this charging period via the AC power
cord.
If Spot Vital Signs LXi displays the E38 error code after power up, set the date (see
“Date/Time Menu Options” on page 31).
The battery is a non-spillable lead-acid battery and must be recycled or
disposed of properly according to national or local regulations.

Service Manual

Maintenance and Service

Braun ThermoScan PRO 4000
Caution Do not use alkaline batteries in the Braun ThermoScan PRO 4000
thermometer.
Welch Allyn supplies a rechargeable battery pack with the Braun ThermoScan PRO 4000
thermometer.
1.

Open the battery compartment.

2. Remove the battery pack and replace with a new battery pack, verify the poles are in
the right direction.
3. Slide the battery door back in until it snaps into place.
If the battery is completely discharged, the LEDs will not illuminate. Allow the unit to
charge at least 15 minutes before proceeding.
The battery is a rechargeable battery and must be recycled or disposed
of properly according to national or local regulations.

Printer
Caution Do not use alkaline batteries in the printer.
1.

Open the battery compartment.

2. Remove the battery pack and replace with a new battery pack, verify the poles are in
the right direction.
3. Slide the battery door back in until it snaps into place.
Allow the printer to charge at least 15 minutes before proceeding.
The battery is a rechargeable battery and must be recycled or disposed
of properly according to national or local regulations.

Maintenance and Service

Welch Allyn Spot Vital Signs LXi

Spot Vital Signs LXi Firmware Upgrade CD
This CD upgrades the Spot Vital Signs LXi unit software version. A detailed procedure is
available on the upgrade CD.

Spot Vital Signs LXi Radio Configuration CD
This CD configures the Spot Vital Signs LXi Radio to a local network. This feature requires
Welch Allyn Connex Version 2.0 or higher (not available in all countries). For more
information about Connex, see www.welchallyn.com.

Product Disposal
Do not dispose of this product as unsorted municipal waste. Prepare this product for
reuse or separate collection as specified by Directive 2002/96/EC of the European
Parliament and the Council of the European Union on Waste Electronic and Electrical
Equipment (WEEE). If this product is contaminated, this directive does not apply.
For more specific disposal information, see www.welchallyn.com/weee,or contact Welch
Allyn Customer Service at +44 207 365 6780.

Calibration and Verification

Terms
BP test volume repair fixture. Equipment with four separate volume cylinders: 100cc,
200cc, 250cc, and 500cc. Referred to in this procedure as Test Volume.
Calibration. Process to change the outputs of the UUT that are out of range. After saving,
the changes become permanent until the next calibration.
Pneumatic test assembly. Equipment that connects the UUT, the pressure meter, the
squeeze bulb, and the BP test volume repair fixture.
Repair software. Software package to verify and calibrate the Spot LXi device.
Service computer. Computer with the repair software loaded and ready to operate.
Tests. Process to check the outputs of the UUT.
UUT. Unit under test.

Calibration and Verification

Welch Allyn Spot Vital Signs LXi

Pneumatic test assembly setup
Equipment:
See “Tool list” on page 101 for equipment part numbers.

Note

• Square fitting connector

• Squeeze bulb with bleeding scew

• Calibrated pressure meter

• Power supply, 0-10 volts, 2 amps capacity or better

• UUT

• Two-tube blood pressure hose with “Y” fitting

• BP test volume repair fixture. Must have at least
the following volume cylinders: 100cc, 250cc, and
500cc

• 12-inch (30.5 cm) tubing with .25-inch (6.35 mm) ID
- quantity 4

Connect a piece of tubing to the squeeze bulb with bleeding screw and the opposite
end to the square fitting connector.

2. Connect another piece of tubing to the square fitting connector and the opposite end
to the calibrated pressure meter.
3. Connect another piece of tubing to the square fitting connector and the opposite end
to the test volume.
4. Connect the last piece of tubing to the square fitting connector and the opposite end
to the “Y” fitting on the two-tube blood pressure.

Pneumatic test assembly

Battery connector simulator

Test volume

DVM

Pressure meter

Power supply

Double bp hose
with y fitting
Squeeze bulb

DVM connections

Service Manual

Calibration and Verification

Voltage Calibration
Equipment:
Note

See “Tool list” on page 101 for equipment part numbers.

• UUT

• Digital voltage meter

• Power supply, 0 to 10 volts, 2 amps capacity or
better

• Battery connector simulator

Disconnect battery and connect power supply to UUT, observing correct polarity.
Connect DVM to power supply leads at the battery simulator.

2. Set the power supply to 6.5 VDC.
3. Power on UUT in configuration mode (press the check button and power on the UUT).
Hold check button until the UUT beeps twice.
4. Adjust the power supply to 5.5 +/- 0.1 VDC at battery connector simulator leads.
5. Select Calibrate > Voltage on the service computer. The UUT LCD goes blank.
6. Read the voltage on the DMM connected to the battery simulator leads.
7.

Enter this voltage reading into the Actual Voltage field and click Calibration button.

8. Click the OK button to accept the inputs. Click Yes to make the changes permanent.
9. Enter your initials in the Calibration Signature Field and click OK. UUT resets and
powers up in normal mode.

Calibration and Verification

Welch Allyn Spot Vital Signs LXi

Pressure verification test
Note

If this is a new NIBP board, go to “Blood pressure calibration” on page 54 and
carefully follow the instructions to initialize this board.
Any UUT in the field for a year or longer is due for calibration. See“Blood pressure
calibration” on page 54 . Otherwise continue in this section.

Equipment:
Note

See “Tool list” on page 101 for equipment part numbers.

• Pneumatic test assembly (see “Pneumatic test
assembly setup” on page 50)

• Power supply, 0 to 10 volts, 2 amps capacity or
better

• Standard blood pressure cuff, size 11 (adult)
preferred

• Battery connector simulator

• Digital voltage meter

• UUT

Disconnect battery and connect the battery simulator and the power supply to the
UUT, observing correct polarity.

2. Connect the DVM to the power supply leads at the battery simulator and set the
power supply to 6.5 volts dc. Measure voltage where the power supply leads connect
to the battery connector simulator leads.
3. Connect UUT to the pneumatic test assembly. Connect the test volume hose to the
500 cc cylinder.
4. Power on UUT in configuration mode (press the check button and power on the UUT).
Hold check button until the UUT beeps twice. The configuration screen displays, scroll
to Blood Pressure and select it. Select BP Calibration Check.
5. Open the repair software and select Test > Calibration. A Test Calibration box
displays on the screen.
6. Verify the pressure is at or near zero and the voltage is within 0.1 VDC of the power
supply (6.5 v dc). Verify the valve status is open and the pump status is off.
7.

Select Close Valve on the UUT. The valve status changes to closed.

8. Select the Start Cuff Inflation. The pump starts inflating the cuff. Verify the pump
status is on and the pressure is rising.
9. Inflate the pressure up to 250 mmHg. Select the Stop Pump on the UUT to stop the
inflation. Fine tune the pressure reading to 250 mmHg with the squeeze bulb.
10. Check the reading on the pressure meter against reading on the UUT.
a.

Verify the pressure on the UUT is within the pressure tolerance in the table. Use
the squeeze bulb to fine tune the pressure at each inflation pressure limit. If the
pressure is within tolerance, go to the next inflation pressure.

Inflation pressure Pressure tolerance

250 mmHg +/- 2 mmHg

50 mmHg +/- 1 mmHg

150 mmHg +/- 1.5 mmHg

0 mmHg +/- 1 mmHg

Service Manual

Calibration and Verification

b. If the UUT is not within the pressure tolerance, open the valve to bleed pressure
to zero. Select Calibrate > Pressure on the repair software. Proceed to “Blood
pressure calibration”. UUT needs calibration.
11. If all readings are within specification, go to “Functional tests” on page 56.

Calibration and Verification

Welch Allyn Spot Vital Signs LXi

Blood pressure calibration
Note

This section updates the pressure calibration of the UUT.
If all readings were within specifications during “Pressure verification test” on
page 52, skip this section and go to “Functional tests” on page 56.

Equipment:
Note

See “Tool list” on page 101 for equipment part numbers.

• Pneumatic test assembly (see “Pneumatic test
assembly setup” on page 50)

• Digital voltage meter

• Standard blood pressure cuff, size 11 (adult)
preferred

• Battery connector simulator

• Power supply, 0 to 10 volts, 2 amps capacity or
better

• UUT

To initialize the NIBP board:
1.

Open repair tool (Ver 3.0 or greater) and click Calibrate > Reset Defaults. The Reset
Defaults window displays.

2. Click Reset > Initialize > OK. The NIBP board is initialized. Perform the blood
pressure calibration section.
To perform the blood pressure calibration
1.

Disconnect battery, connect the power supply, and set to 6.5 volts dc. Otherwise
leave power supply as it is from “Pressure verification test” on page 52.

2. On the service computer select Calibrate > Pressure.
3. Power on UUT in configuration mode (press the check button and power on the UUT).
Hold check button until the UUT beeps twice. The configuration screen displays, scroll
to Blood Pressure and select it. Select BP Calibration Check.
4. Connect the hose to the 500cc cylinder of the test volume and verify the following:
•

the pressure is at zero mmHg,

•

the bleed screw on squeeze bulb is closed,

•

valve on UUT is in the open state.

5. On the computer screen select Calibrate Zero button.
6. Press the NIBP button to close valve on UUT and use the squeeze bulb to manually
inflate the UUT to 200 mmHg. Let stabilize. Enter the pressure meter reading in the
Calibration Gain Field on the service computer. Be as precise as possible. If
pressure meter has resolution of 1 mmHg make sure it reads 200 without switching
to 199 or 201. Enter 200.00 in Calibration Gain Field.
7.

Click Calibrate Gain on the service computer.

8. Click OK to accept the inputs. Click Yes to make the changes permanent.

Service Manual

Calibration and Verification

9. Enter your initials in the Calibration Signature Field and click OK. UUT resets and
powers up in normal mode.
10. Blood Pressure calibration is complete.

Calibration and Verification

Welch Allyn Spot Vital Signs LXi

Functional tests
Note

Perform the tests sequentially.
Each test is software driven. Selecting the Test button begins the test.
Connect and verify the correct cylinder (in parenthesis) or the test will fail.
Select Configuration to see a preferred connections diagram for each test.

Equipment:
• Pneumatic test assembly (see “Pneumatic test
assembly setup” on page 50)

• Digital voltage meter

• Standard blood pressure cuff, size 11 (adult)
preferred

• Battery connector simulator

• Power supply, 0 to 10 volts, 2 amps capacity or
better

• UUT

Test specifications:
Leak test

6mm maximum in 15 seconds with a volume of 100 cc at 250 mmHg

Dump test

From 260 to less than 15 mmHg in 10 seconds or less with a volume of 500 cc

Inflation test

From 5 to 210 mmHg in 7 seconds or less with a volume of 250 cc

Valve control test

From 160 mmHg with a volume of 100 cc
Open the valve for the following amounts of time and pressure drop:
•10 msec = 4 to 12 mmHg
•15 msec = 4 to 15 mmHg
•25 msec = 4 to 25 mmHg

Inflation linearity

Connect a standard size cuff to the UUT and inflate.
Measure the pressure at 6, 9, and 12 seconds and compare to the expected readings at these
intervals.
Also check the noise level at 7, 10, and 13 seconds into the inflation step.

To perform the functional tests:
1.

Close the Pneumatics test box and open the Current Levels test box. Perform the
tests listed.
a.

Sleep state mode: LCD is off and the UUT is idle. Verify the current is
approximately 200 mA.

b. Valve/pump mode: UUT is fully active with the valve closed and the pump
running. The UUT can draw up to 2.0 amperes in this state.
c.

Normal mode: LCD is lit, but the UUT is inactive. The UUT current draw is
approximately 700 to 800 mA.

2. Close the Test Current Levels box and open the Test Noise Levels box. The Test
Noise Levels test measures the amount of noise on the UUT A-D pressure channel.
The sample is 1 second in length with 0 mmHg applied. The maximum allowed noise
is .050 mmHg.
3. Close the Test Noise Levels box and open the Buttons Test box.

Service Manual

Calibration and Verification

4. Press each button on the UUT and verify the appropriate button lights on the service
computer.
5. When finished close the Buttons Test box and open the Interface box.
6. Perform all commands in this test, verifying the LCD on the UUT responds correctly
with each command.
To perform the over pressure test:
1.

Verify the UUT is in normal mode and remove the blood pressure cuff.

2. Re-install the pneumatic test assembly with the 250 cc cylinder connected.
3. Go to the repair software select Unit >Status. A Unit Status box displays.
4. Check the Log Status Information box in the lower right hand corner of the
computer screen. Event logs display in rapid succession.
5. Immediately initiate a blood pressure reading. As the pressure increases, start
applying additional pressure with the squeeze bulb.
6. Increase the pressure to the UUT until an E10 error displays.
7.

Uncheck the Log Status Information box and close the Unit Status box.

8. Scroll through the event log to locate the last ‘no’ answer, directly followed by the first
‘yes’ answer in the column labeled over pressure.
9. Scroll to the right to see the mmHg pressure that these events occurred.
10. Select the higher pressure reading when the E10 error occurred. Verify the pressure is
between 296 and 329 mmHg.
Note

The following tests are for verification only. There is no updating of calibration
parameters. If any function fails accuracy standards, replace the part.

Calibration and Verification

Welch Allyn Spot Vital Signs LXi

Temperature Functional Check
The 9600 Plus Calibration Tester takes approximately 20 minutes to heat to the lowest
setting. When testing several thermometers at all three temperatures, it is
recommended to test all probes at one Calibration Set Point Temperature before
proceeding to the next Calibration Set Point Temperature.
To further expedite testing start at the lowest Calibration Set Point Temperature. The 9600
Plus Calibration Tester does not have an internal fan, this causes a longer cool down time
than warm up time.
Refer to the 9600 Plus Calibration Tester Directions for Use manual for specific
information regarding the LCD window or the control buttons.
1.

Choose the proper mains plug insert and slide it over the two prongs in the power
converter.

Figure 1. Power Adapter and Mains Plug Inserts
Two prongs in the
power adapter

AUS

2. Plug the power adapter into the 9600 Plus Calibration Tester (Figure 1) and the
opposite end into a wall outlet.
3. Place the 9600 Plus Calibration Tester on a level surface away from sunlight, drafts,
and other sources of heat or cold.
4. Observe the Set Point Mode in the upper left hand corner of the LCD display. If the
unit displays a "D", it is in Default Mode and will heat to the lowest Set Point
Temperature. If you do not want to conduct testing at this Set Point Temperature,
press and hold the Temperature Selection button to select the desired setting. The
temperature display will flash before staying on continuously to indicate the 9600 Plus
Calibration Tester has stabilized and is ready for use.

Service Manual

Calibration and Verification

Welch Allyn SureTemp Plus Thermometers
Caution Store thermometers for testing in the same room as the 9600 Plus
Calibration Tester for approximately 30 minutes prior to testing to allow for
thermal accommodation.
To begin functional verification of the SureTemp Plus thermometer:
1.

Remove the probe from the probe well and clean it with either a 70% isopropyl
alcohol solution, a 10% chlorine bleach solution, or a non-staining disinfectant. Let
the probe air dry. Do not apply a probe cover.

2. Place the thermometer in Monitor Mode, refer to the thermometer’s Operator's
Manual.
3. Insert the probe into the Thermistor Device Port.
Figure 2. 9600 Plus Calibration Tester with the Welch Allyn SureTemp Plus Thermometer

4. Wait for approximately one minute or until temperature on the thermometer is stable
for ten seconds. Compare the thermometer's temperature reading to the 9600 Plus
Calibration Set Point Temperature. If the temperatures are within ±0.1° C (±0.2° F),
the thermometer is within calibration.
5. Test all available thermometers for calibration verification at the current Calibration Set
Point Temperature. Proceed to the next Calibration Set Point Temperature, see
“Changing the Calibration Set Point Temperature” on page 61.

Calibration and Verification

Welch Allyn Spot Vital Signs LXi

Braun ThermoScan Pro 4000
Caution Store thermometers for testing in the same room as the 9600 Plus
Calibration Tester for approximately 30 minutes prior to testing to allow for
thermal accommodation.
To begin functional verification of the Braun ThermoScan PRO 4000 thermometer:
1.

Clean the probe tip with a cotton swab slightly moistened with isopropyl alcohol,
remove excess alcohol with a clean cotton swab, and let air dry for 5 minutes.Do not
use any chemical other than alcohol to clean the probe window.

2. Place the Braun ThermoScan Pro 4000 in Calibration Mode using the following steps.
a.

Push and release the I/O MEM button to turn the product on. The display shows
symbols and functions. The Braun ThermoScan Pro 4000 performs an automatic
self check. After a few seconds you hear a beep and see three dashed lines, a
sound symbol, and ° C or ° F on the display.

b. Push the I/O MEM button again and keep it pressed for the following steps:
•

After approx. 3 seconds the “OFF” symbol flashes on the display (keep
pressing the button).

•

When you hear a beep, release the button immediately.

•

The Braun TheromScan Pro 4000 is now in calibration check mode and the
display is flashing and showing the “CAL” symbol.

3. Apply a new probe cover. Place the probe firmly into the Ear Device Port.
Figure 3. 9600 Plus Calibration Tester with the Braun ThermoScan Pro 4000

4. Wait approximately three seconds, press the thermometer Start button, and watch for
the "Exac Temp" light to flash.
5. Leave the thermometer in the 9600 Plus Calibration Tester until you hear a beep.
6. Remove the Pro 4000 Thermometer from the 9600 Plus Calibration Tester and read
the temperature in the thermometer’s display. If the temperatures are within ±0.1° C
(±0.2° F), the thermometer is within calibration.

Service Manual

Calibration and Verification

Wait one full minute before taking another reading with the same thermometer.
Repeated measurements in short sequence may cause higher readings.

8. The device will exit CAL mode after four minutes.
9. Test all available thermometers for calibration verification at the current Calibration Set
Point Temperature. Proceed to the next Calibration Set Point Temperature, see
“Changing the Calibration Set Point Temperature”.

Changing the Calibration Set Point Temperature
To scroll from one set point to the next, press and hold the Temperature Selection button
until a beep is heard. The newly selected set point appears in the upper left corner of the
LCD display. The device’s current temperature is displayed, starts to flash, and continues
flashing until the cavity reaches the equilibrium at the new set point.

Masimo SpO2 Functional Check
Use the Masimo Tester to perform to functionally check the Masimo sensors.
1.

Orient the Masimo Tester such that the mini-D connector mates with the SpO2
connector on Spot Vital Signs LXi.

2. Power on Spot Vital Signs LXi and confirm the SpO2 reading in the Display Window is
81%± 3% and the pulse reading is 61 bpm ± 1 bpm.
3. Place the thumb and index finger on the gray buttons on either side of the Masimo
Tester connector, press the buttons firmly, and gently pull to remove the tester.
There is no way to change the functionality of the SpO2 module. If the SpO2 is out of
calibration, contact Technical Service.

Nellcor SpO2 Functional Check
Use a Nellcor-approved SpO2 simulator (SRC-MAX ) to check the SpO2 functionality.
1.

Orient the simulator such that the connector mates with the SpO2 connector on Spot
Vital Signs LXi.

2. Power on Spot Vital Signs LXi and confirm the SpO2 reading in the Display Window is
90%± 1% and the pulse reading is 60 bpm ± 1 bpm.
3. Place the thumb and index finger on either side of the simulator connector, press the
buttons firmly, and gently pull to remove the simulator.
There is no way to change the functionality of the SpO2 module. If the SpO2 is not
functioning properly, contact Technical Service.

Calibration and Verification

Welch Allyn Spot Vital Signs LXi

Specifications

Performance
This section describes normal ranges for Spot Vital Signs LXi.

Blood Pressure Accuracy
Blood pressure accuracy meets or exceeds AAMI SP10:2002 standards for non-invasive
blood pressure accuracy (± 5 mmHg mean error, 8 mmHg standard deviation). Blood
pressure accuracy is validated for pressure measurement using the upper arm only.
Cuff Pressure Range

0 to 300 mmHg

Systolic Range

60 to 250 mmHg

Diastolic Range

30 to 160 mmHg

Blood Pressure Determination Time

Typical: 15 seconds

Mean Arterial Pressure Range

40 to 190 mmHg

Pulse Rate Range
(using SpO2 determination)

25 to 240 bpm

Pulse Rate Range
(using Blood Pressure determination)

35 to 199 bpm

Pulse Rate Accuracy (using SpO2
determination)

Without Motion: 25 to 245 bpm ± 3 digits1
With Motion: normal physiologic range (55 to 125 bpm) ± 5 digits
Low Perfusion: 25 to 245 bpm ± 3 digits1

Pulse Rate Accuracy
(using Blood Pressure determination)
Overpressure Cutoff
1 Specification applies to device performance and was validated with Biotek and Nellcor simulators.

±5.0%
315 mmHg ±15 mmHg

Specifications

Welch Allyn Spot Vital Signs LXi

Temperature Specifications
Temperature Range
SureTemp Plus
Braun ThermoScan PRO 4000
Calibration Accuracy
SureTemp Plus
Braun ThermoScan PRO 4000 for displayed
temperature ranges
Display Resolution
SureTemp Plus Predict Time
Oral
Adult Axillary
Pediatric Axillary
Rectal

80° to 110° F (26.7° to 43.3° C)
68° to 108° F (20° to 42.2° C)
±0.2° F (0.1° C) (Monitor Mode)
± 0.4° F (±0.2° C) 95.9° to 107.6° F (35.5° to 42° C)
±0.5° F (±0.25° C) (outside this temperature range)
0.1° F or ° C
Approx. 4 to 6 seconds
Approx. 12 to 15 seconds (age 18 years and older)
Approx. 10 to 13 seconds (age 17 years and younger)
Approx. 10 to 13 seconds

Service Manual

Specifications

SpO2 Specifications
Masimo Sensor Accuracy Guide
Accuracy specified when used with Masimo SET pulse oximetry monitors or with
licensed Masimo SET pulse oximetry modules using PC series patient cables, during no
motion. Numbers present ± 1 standard deviation. Plus or minus one standard deviation
represents 68% of the population. SpO2 accuracy from 70% to 100%. Pulse rate
accuracy from 25 to 240 bpm.
Performance Measurement Range

SpO2: 1 to 100%
Pulse Rate: 25 - 240 beats per minute (BPM)

Perfusion

0.02% to 20%

Accuracy

Saturation: 70% to 100%
No Motion: Adults, Pediatrics ± 2 digits
Neonates ± 3 digits
Motion: Adults, Pediatrics ± 3 digits
Neonates ± 3 digits
Low Perfusion: Adults, Pediatrics ± 2 digits
Neonates ± 3 digits

Pulse Rate Accuracy

Pulse Rate: 25 to 250 bpm
No Motion: Adults, Pediatrics, Neonates ± 3 digits
Motion: Adults, Pediatrics, Neonates ± 5 digits
Low Perfusion: Adults, Pediatrics, Neonates ± 5 digits

Table 1. Masimo Sensor Accuracy Guide
Saturation Accuracy
Sensor

Pulse Rate Accuracy

Weight Range

No Motion

Motion

No Motion

Motion

LNOP-ADT

> 30 kg

± 2%

± 3%

± 3 bpm

± 5 bpm

LNOP-PDT

10 to 50 kg

± 2%

± 3%

± 3 bpm

± 5 bpm

LNOP-NEO

< 10 kg

± 3%

± 3 bpm

± 5 bpm

LNOP-NEOPT

< 1 kg

± 3%

± 3 bpm

± 5 bpm

LNOP-DCI

> 30 kg

± 2%

± 3%

± 3 bpm

± 5 bpm

LNOP-DCIP

10 to 50 kg

± 2%

± 3%

± 3 bpm

± 5 bpm

Masimo Patents
The Masimo sensors and cables are covered under one or more of the following U.S.A.
patents: 5,758,644; 5,823,950; 6,011,986; 6,157,850; 6,263,222; 6,501,975; and other
applicable patents listed at www.masimo.com/patents.htm.

Specifications

Welch Allyn Spot Vital Signs LXi

Nellcor Sensor Accuracy Guide
Accuracy specifications are based on controlled hypoxia studies with healthy,
non-smoking adult volunteers over the specified saturation SpO2 range. Pulse oximeter
SpO2 readings were compared to SaO2 values of drawn blood samples measured by
hemoximetry. All accuracies are expressed as + “X” digits. This variation equals + one
standard deviation (+ 1 SD), which encompasses 68% of the population.
Table 2. OxiMax Sensor Models, Single Patient Use
Sensor Models

SpO2 Range
70% to 100%

MAX-AI1

±2

MAX-PI*

±2

MAX-II

±2
2

± 3.5

MAX-RI

1 The accuracy specification under motion conditions is ± 3. For a definition of motion, contact Nellcor

Technical Services or your local Nellcor representative.

2 The accuracy specification has been determined between saturations of 80% to 100%.

Table 3. OxiCliq Sensor Models, Single Patient Use
Sensor Models
OXICLIQ-PI

SpO2 Range
70% to 100%
± 2.5

Table 4. Reusable Sensor Models
Sensor Models
D-YS (Infant to Adult)

SpO2 Range
70% to 100%
±3

D-YS and D-YSE

± 3.5

D-YS and D-YSPD

± 3.5

DS-100A

±3

OXI-A/N (Adult/neonate)

Adult: ± 3
Neonate: ± 4

OXI-P/I (Pediatric/infant)

±3

Nellcor Patents
Covered by one or more of the following US Patents: 4,802,486; 4,869,254; 4,928,692;
4,934,372; 5,078,136; 5,351,685; 5,485,847; 5,533,507; 5,577,500; 5,803,910; 5,853,364;
5,865,736; 6,083,172; 6,708,049; Re. 35,122 and foreign equivalents.

Service Manual

Specifications

Mechanical
Dimensions

Height: 10.63 “ (27 cm)
Length/Braun: 8” (20.32 cm)
Length/SureTemp Plus: 7.5” (19 cm)
Depth: 5.25” (13.34 cm)

Weight

7.5 lbs (3.4 kg)

Mounting

Self-supporting on rubber feet
Custom mobile stand
Custom wall mount

Portability

May be hand-carried when held by the rear handle

Electrical
Power Requirements

Patient-rated isolation transformer is connected to AC mains:
100-240V, 50-60Hz, 0.4A or internal power: 6Vdc, 6Ah

Patents
6,827,488; 6,971,790; and other patents pending.

Battery
Sealed lead acid, with external charger.
The Spot Vital Signs LXi battery is 90 to 100% charged after 6 hours of charging. The
rechargeable batteries in the Braun ThermoScan PRO 4000 thermometer requires an
additional 1 hour to charge and the rechargeable batteries in the external printer require an
additional 4 hours to charge. The battery automatically charges when Spot Vital Signs LXi
is powered through the AC power transformer. An operator can use the device while the
battery is charging; however, the battery charges faster when the instrument is not in
operation.

Environmental
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.
Operating Temperature
Storage/Transport Temperature

50° to 104° F (10° to 40° C)
Device with SureTemp Plus: -13 to 131F (-25 to 55C)
Device with Braun ThermoScan PRO 4000: -4 to 122F (-20 to 50C)

Relative Humidity

15 to 95% (non-condensing)

Operating Altitude

-557 to 16,000 ft. (-170 to 4877 m)

Specifications

Welch Allyn Spot Vital Signs LXi

Radio
Refer to the manufacturer’s Direction for Use.

Mechanical
Dimensions
Mounting
Operating Temperature
Storage Temperature

3.93” L x 2.38” W x 1.42” T
99.78mm L x 60.5 mm W x 36.1mm T
Nylon Bracket
-40° C to +85° C
-40° C to +125° C

Configuration Options
DHCP Enabled or Not

If not DHCP:
• IP Address
• Subnet Address
• Gateway

Encryption

• WEP
• WPA

WPA Pass Phrase

Channel

WEP Key 1-4
SSID

Default WEP Key
WEP Authentication

Service Manual

Specifications

Guidance and Manufacturer’s Declaration For Spot Vital
Signs LXi Radio
Emissions and Immunity Information
Electromagnetic Emissions
The Spot Vital Signs LXi is intended for use in the electromagnetic environment specified below. The customer or user of the Spot Vital Signs
LXi should assure that it is used in such an environment.
Emissions Test

Compliance

Electromagnetic Environment - Guidance

RF emissions

Group 1

The Spot Vital Signs LXi uses RF energy only for its internal function. Therefore, its RF
emissions are very low and are not likely to cause any interference in nearby electronic
equipment.

Class B

The Spot Vital Signs LXi is suitable for use in all establishments, including domestic
establishments and those directly connected to the public low-voltage
power supply network that supplies buildings used for domestic purposes.

CISPR 11
RF emissions
CISPR 11
Harmonic emissions

Class A

IEC 61000-3-2
Voltage fluctuations/
flicker emissions

Complies

IEC 61000-3-3

Electromagnetic Immunity
The Spot Vital Signs LXi is intended for use in the electromagnetic environment specified below. The customer or user of the Spot Vital Signs
LXi should assure that it is used in such an environment.
Immunity Test

IEC 60601
Test Level

Compliance Level

Electromagnetic Environment - Guidance

Electrostatic discharge
(ESD)

± 6 kV contact

± 8 kV air

Floors should be wood, concrete, or ceramic tile. If floors are
covered with synthetic material, the relative humidity should
be at least 30%.

Electrical fast transient/ ±2 kV for power supply
burst
lines

±2 kV for power supply
lines

Mains power quality should be that of a typical commercial or
hospital environment.

IEC 61000-4-4

±1 kV for input/output
lines

Surge

±1 kV differential mode

IEC 61000-4-5

±2 kV common mode

IEC 61000-4-2

Mains power quality should be that of a typical commercial or
hospital environment.

Specifications

Welch Allyn Spot Vital Signs LXi

Voltage dips, short
interruptions, and
voltage variations on
power supply input
lines.

>95% dip in 0.5 cycle

60% dip in 5 cycles

30% dip for 25 cycles

IEC 61000-4-11

>95% dip in 5 seconds

Power frequency
(50/60Hz)
magnetic field

3 A/m

Mains power quality should be that of a typical commercial or
hospital environment. If the user of the Spot Vital Signs LXi
requires continued operation during power mains
interruptions, it is recommended that the Spot Vital Signs LXi
be powered from an uninterruptible power supply or battery.

Power frequency magnetic fields should be at levels
characteristic of a typical location in a typical commercial or
hospital environment.

IEC 61000-4-8

IEC 60601
Test Level

Compliance Electromagnetic Environment - Guidance
Level
Portable and mobile RF communications equipment should be used no closer
to any part of the Spot Vital Signs LXi, including cables, than the
recommended separation distance calculated from the equation applicable
to the frequency of the transmitter.
Recommended separation distance

Conducted RF
IEC 61000-4-6

3 Vrms
150 kHz to 80 MHz

3 Vrms

d = (1.17) P

Radiated RF
IEC 61000-4-3

3 V/m
80 MHz to 2.5 GHz

3 V/m

d = (1.17) P 80 MHz to 800 MHz
d = (2.33) P 800 MHz to 2.5 GHz
where P is the maximum output power rating of the transmitter in watts (W)
according to the transmitter manufacturer and d is the recommended
separation distance in metres (m).
Field strengths from fixed RF transmitters, as determined by an
electromagnetic site survey,a should be less than the compliance level in
each frequency range.b
Interference may occur in the vicinity of equipment marked with the
following symbol:

Note 1: At 80 MHz and 800 MHz, the higher frequency range applies.
Note 2: These guidelines may not apply in all situations. Electromagnetic propagation is affected by absorption and reflection from structures,
objects, and people.
a Field strengths from fixed transmitters, such as base stations for radio (cellular/cordless) telephones and land mobile radios, amateur radio,

AM and FM radio broadcast and TV broadcast cannot be predicted theoretically with accuracy. To assess the electromagnetic environment due
to fixed RF transmitters, an electromagnetic site survey should be considered. If the measured field strength in the location in which the Spot
Vital Signs LXi is used exceeds the applicable RF compliance level above, the electrocardiograph should be observed to verify normal operation.
If abnormal performance is observed, additional measures may be necessary, such as reorienting or relocating the electrocardiograph.
b Over the frequency range 150 kHz to 80 MHz, field strengths should be less than 3 V/m.

Service Manual

Specifications

Recommended Separation Distances Between Portable and Mobile RF Communications Equipment and the Spot Vital Signs LXi
The Spot Vital Signs LXi is intended for use in an electromagnetic environment in which radiated RF disturbances are controlled. The customer
or user of the Spot Vital Signs LXi can help prevent electromagnetic interference by maintaining a minimum distance between portable and
mobile RF communications equipment (transmitters) and the Spot Vital Signs LXi as recommended below, according to the maximum output
power of the communications equipment.
Separation Distance According to Frequency of Transmitter (m)
Rated Max. Output
Power of Transmitter
(W)

150 kHz to 80 MHz

80 MHz to 800 MHz

800 MHz to 2.5 GHz

d = (1.17) P

d = (2.33) P

0.01

0.117

0.233

0.1

0.37

0.74

1.17

2.33

3.70

7.37

100

11.70

23.30

For transmitters rated at a maximum output power not listed above, the recommended separation distance d in meters (m) can be estimated
using the equation applicable to the frequency of the transmitter, where P is the maximum output power rating of the transmitter in watts (W)
according to the transmitter manufacturer.
Note 1: At 80 MHz and 800 MHz, the separation distance for the higher frequency range applies.
Note 2: These guidelines may not apply in all situations. Electromagnetic propagation is affected by absorption and reflection from structures,
objects, and people.

Specifications

Welch Allyn Spot Vital Signs LXi

Troubleshooting
This chapter provides helpful information in troubleshooting the Spot Vital Signs LXi.

Error Codes
The following tables of error codes provide a quick reference of the descriptions and
probable causes of error codes.
Table 1. Informational Error Codes
Internal
Event Log
Code
Number

Displayed
Internal Event Log Description
Device Code

Corrective Action

_n/a

Message displays when the user attempts Printing is already in progress
to start another print while a print job is
currently printing.

_n/a

Clear current reading.

_n/a

Erase all readings.

_n/a

Information screen telling the user how to Use the navigation keys to edit
operate the location identifier edit menu characters and the SELECT key to stop
in Configuration Mode.
editing.

_n/a

Message displays when Mod F cannot
perform a STEP NIBP measurement and
switches to normal method.

_n/a

Message displays when in MEM mode
and there are no readings to display.

_n/a

External devices configuration menu
message when the user tries to exit the
menu having enabling the information
system, but not that Patient ID.

User must enable the Patient ID if using
the information system.

_n/a

Message displays below txtPIDMsgB.

User must press SELECT and correct the
problem.

_n/a

Information displays when the user
enables device in external devices
configuration menu.

User must connect the Spot Vital Signs
LXi to an external device.

_n/a

Message displays below txtPIDMsgA

User must press SELECT when
completed.

_n/a

Line displays below error/information
message if the user can clear the error/
condition.

User must press ACCEPT to clear.

Restrict patient movement.

Troubleshooting

Welch Allyn Spot Vital Signs LXi

Table 1. Informational Error Codes
Internal
Event Log
Code
Number

Displayed
Internal Event Log Description
Device Code

_n/a

Corrective Action

User decides whether to reset everything
back go factory default values.
Error condition occurs causing the unit to Spot Vital Signs LXi will shut down in 1
automatically shut down. The user cannot minute.
clear this message.

_n/a

User confirms to start printing.

Table 2. Blood Pressure Error Codes
Internal
Event Log
Code
Number

Displayed
Internal Event Log Description
Device Code

C01

User abort.

C03

Inflation too quick.

Check tubing and connections.

E10

Overpressure

Check patient.

C04

Major air leak.

Excessive inflation time; check for air
leaks.

C05

Excessive arm movement

Excessive noice, check cuff placement;
restrict patient movement.

C07

Auto cycle skipped, system busy.

Device will power down.

C07

Auto cycle skipped, NIBP reached too
soon.

Device will power down.

C02

Auto zero failure.

Auto zero failure; check air obstruction;
limit patient movement.

C04

Could not reach target pressure.

Excessive inflation time; check for air
leaks.

E20

Missed A/D sample.

General internal malfunction. Call
Technical Support.

E20

A/D timeout failure.

General internal malfunction. Call
Technical Support.

NIPB NOT AVAILABLE.

Correct probe tip conditions. If problem
persists, replace probe. If problem still
persists, replace module.

Corrective Action

E11

Malfunction

User should try another cycle. If problem
persists, replace probe.

C06

Reinflation needed.

Measurement was outside of device’s
measurement range.

C05

Cycle took too long.

Check cuff placement; restrict patient
movement.

C12

Ambient temp out of range.

Check internal temperature at probe well.
Verify ambient temperature does not
exceed operating specification.

C13

Battery failure

Battery failure; use wall transformer.

Service Manual

Troubleshooting

Table 2. Blood Pressure Error Codes
Internal
Event Log
Code
Number

Displayed
Internal Event Log Description
Device Code

Corrective Action

E11

> 10mm residual pressure > minutes.

Verify that the supply voltage is within
specification.

E11

>15mm residual pressure >3 mins.

Verify that the supply voltage is within
specification.

C02

Couldn’t bleed pressure < 9 mmHg

Auto zero failure, check tubing for kinks
and connection integrity, limit patient
movement.

Termistor pulled away from the tip or
heater broken.

Try another predict cycle. If the problem
persists, replace probe.

Probe not responsive. Probe not
characterized/calibrated.

Replace probe.

Probe not characterized/calibrated.

Replace probe.

C06

Low inflation; first step had largest value, Measurement was outside of Spot Vital
first step’s value > systolic value.
Signs LXi measurement range.

C06

Dump too soon; last step had largest
value, next to last step’s value > diastolic
value; will not normally occur in autodump mode.

Check connections; restrict patient
movement.

C05

Step too big systolic; difference in
pressure between step above and step
below systolic is too great.

Excessive noise; check cuff placement and
limit movement.

C05

Step too big diastolic; difference in
pressure between step above and step
below diastolic is too great.

Excessive noise; check cuff placement and
limit movement.

C05

Range error: calcualted BP is outside of
measurement range.

Excessive noise; check cuff placement and
limit movement.

C05

Pressure reverse systolic; pressure of step Excessive noise; check cuff placement and
above systolic is lower than pressure of
limit movement.
step below systolic.

C05

Pressure reverse diastolic; pressure of
Excessive noise; check cuff placement and
step above systolic is lower than pressure limit movement.
of step below diastolic.

C05

Step too big MAP; difference in pressure
between adjacent steps near MAP is too
great.

Excessive noise; check cuff placement and
limit movement.

C05

Too few steps; less than 5 steps

Excessive noise; check cuff placement and
limit movement.

C05

Excessive noise; check cuff placement and
Bad value diastolic; value of step below
diastolic and step below that step are not limit movement.
consistent.

C05

Value reverse systolic; value of step above Excessive noise; check cuff placement and
systolic is greater than value of step
limit movement.
below systolic.

C05

Value reverse diastolic; value of step
Excessive noise; check cuff placement and
above systolic is greater than value of step limit movement.
below diastolic.

Troubleshooting

Welch Allyn Spot Vital Signs LXi

Table 2. Blood Pressure Error Codes
Internal
Event Log
Code
Number

Displayed
Internal Event Log Description
Device Code

Corrective Action

C05

No info - can’t be produced by Mod F if
they don’t exist in the code.

Excessive noise; check cuff placement and
limit movement.

C05

No info - can’t be produced by Mod F if
they don’t exist in the code.

Excessive noise; check cuff placement and
limit movement.

C05

No info - can’t be produced by Mod F if
they don’t exist in the code.

Excessive noise; check cuff placement and
limit movement.

C05

Out of memory; deflation contains too
many steps. SW sets allowable limit of
steps that can be stored and used for BP
determination for a given cycle.

Excessive noise; check cuff placement and
limit movement.

C05

Retarget error; cycle tried to retarget too
many times. Only one allowed retarget
allowed per cycle.

Excessive noise; check cuff placement and
limit movement.

C05

Repump error: Tried to repump too many
times. Limit is set to 3 repumps. This can
occur on a cycle with bad signal to noise
ratio or if a subject’s pulses are so small
that pulses above the diastolic ratio are
not detectable with the lowest allowed
thread threshold.

Excessive noise; check cuff placement and
limit movement.

C05

Excessive noise; check cuff placement and
Systolic curve fit error; the steps on the
systolic side of the envelope could not be limit movement.
curve fit. Causes include: too few or too
many steps sent to curve fit routine; math
error in curve fit routine.

C05

Diastolic curve fit error; the steps on the Excessive noise; check cuff placement and
systolic side of the envelope could not be limit movement.
curve fit. Causes include: too few or too
many steps sent to curve fit routine; math
error in curve fit routine.

C05

Systolic slope error; slope of curve fit of
systolic points has a slope out of range.
Can occur with bad cuff fit, rapidly
changing BP etc.

Excessive noise; check cuff placement and
limit movement.

C05

Diastolic slope error; slope of curve fit of
diastolic points has a slope out of range.
Can occur with bad cuff fit, rapidly
changing BP etc.

Excessive noise; check cuff placement and
limit movement.

C05

Systolic extrapolation error; the systolic
Excessive noise; check cuff placement and
pressure that is represented by the
limit movement.
systolic ratio is outside of the data sent to
the curve fit routine.

C05

Diastolic extrapolation error; the systolic
pressure that is represented by the
diastolic ratio is outside of the data sent
to the curve fit routine.

C05

Peak range error; the height of the peak of Excessive noise; check cuff placement and
the envelope is outside normal limits.
limit movement.

C05

Reinflation too late.

Excessive noise; check cuff placement and
limit movement.

Service Manual

Troubleshooting

Table 2. Blood Pressure Error Codes
Internal
Event Log
Code
Number

Displayed
Internal Event Log Description
Device Code

Corrective Action

C06

High heart rate.

Unable to determine blood pressure; pulse
rate may be out-of-range.

Err

Too many reinflates.

Restrict patient movement.

C06

Problem reading the modeule’s EEPROM or Verify that the supply voltage is correct.
saving to the module’s EEPROM.
Try to make changes. If problem persists,
replace module.

C06

Problem reading the probe’s EEPROM.

C06

The probe non-volatile error log memory
Measurement was outside of device’s
error detection mechanism detected error. measurement range.

C06

The module’s non-volatile error log
memory error detecting mechanism
detected an error.

5600

Err

Invalid ModF algorithm.

5601

Err

Invalid ModF init code.

5602

Err

Invalid ModeF PMode.

5603

Err

Invalid ModF target pressure.

5604

Err

Invalid ModF configuration.

Verify that the supply voltage is correct.
Try to make changes.

Measurement was outside of device’s
measurement range.

Table 3. Post Error Codes
Internal
Event Log
Code
Number

Displayed
Internal Event Log Description
Device Code

Corrective Action

E30

FPROM checksum error.

General internal malfunction; contact
technical support.

E31

RAM test failure.

General internal malfunction; contact
technical support.

E32

Factory EEprom checksum error.

General internal malfunction; contact
technical support.

E33

User EEprom checksum error.

General internal malfunction; contact
technical support.

E34

A/D converter failure.

General internal malfunction; contact
technical support.

E35

SpO2 module failure.

General internal malfunction; contact
technical support.

E36

Diatek module failure

General internal malfunction; contact
technical support.

E37

Printer problem.

General internal malfunction; contact
technical support.

E38

Real time clock failure.

Date and time not set; see “Set the Date
and Time Configurations” in the
Directions for Use.

Troubleshooting

Welch Allyn Spot Vital Signs LXi

Table 3. Post Error Codes
Internal
Event Log
Code
Number

Displayed
Internal Event Log Description
Device Code

Corrective Action

E39

No calibration signature.

General internal malfunction; contact
technical support.

E40

Bad NIBP calibration record.

General internal malfunction; contact
technical support.

E41

Stepper valve bad.

General internal malfunction; contact
technical support.

E42

8bit substitute for 16bit errors.

Internal communications error.
Disconnect the battery and wait 5
minutes. Reconnect the battery, and then
see “Set the Date and Time
Configurations” in the Directions for Use.

E43

Error log checksum error.

General internal malfunction; contact
technical support.

Err-E44

POST que full.

General internal malfunction; contact
technical support.

E44 E45

POST que full.

General internal malfunction; contact
technical support.

Table 4. SureTemp Plus Temperature Error Codes
Internal
Event Log
Code
Number

Displayed
Internal Event Log Description
Device Code

Corrective Action

121

E0.4

Probe is over temperature (112° F /
44.4° C).

Correct probe tip conditions. If problem
persists, replace probe.

122

E0.1

Excessive heater energy.

Try another predict cycle. If problem
persists, replace probe.

123

Host interface error.

Try another predict cycle. If problem
persists, replace probe.

124

A^!

Device outside operating temperature
range.

Decrease ambient temperature.

125

Av!

Device outside operating temperature
range.

Increase ambient temperature.

126

Invalid SureTemp algorithm.

Try another predict cycle. If problem
persists, replace probe.

127

Battery voltage over the algorithm’s
maximum value.

Contact Technical Service.

128

Battery voltage under the algorithm’s
minimum value.

Contact Technical Service.

129

Battery voltage not set.

Try another predict cycle. If problem
persists, replace probe.

130

Prediction algorithm not set.

Try another predict cycle. If problem
persists, replace probe.

131

Ambient temperature not set.

Try another predict cycle. If problem
persists, replace probe.

Service Manual

Troubleshooting

Table 4. SureTemp Plus Temperature Error Codes
Internal
Event Log
Code
Number

Displayed
Internal Event Log Description
Device Code

Corrective Action

132

E0.5

No probe temperature rise.

Try another predict cycle. If problem
persists, replace probe.

133

E0.9

Probe EEPROM is uninitialized. Bad probe
gain.

Calibrate probe or replace probe.

134

E0.9

Probe EEPROM is uninitialized. Bad probe
response value.

Calibrate probe or replace probe.

145

E0.2

A/D measurement overrun - pulse too
long.

Patient or environmental temperature
conditions may be too low. Verify
conditions at 80° F and 50° F
respectively. If conditions are valid and
problem persists, replace probe. If
problem still persists replace device.

146

E0.2

A/D Measurement underrun - pulse too
short.

Patient or environmental temperature
conditions may be too high. Verify
conditions at 110° F and 104° F
respectively. If conditions are valid and
problem persists, replace probe. If
problem still persists, replace device.

147

E4.1

A/D measurement overrun - RCAL pulse
too long.

If problem persists, replace device.

148

E4.1

A/D measurement underrun - RCAL pulse
too short.

If problem persists, replace device.

149

E4.0

A/D measurement overrun - PTB pulse too If problem persists, replace device.
long.

150

E4.0

A/D measurement underrun - PTB pulse
too short.

If problem persists, replace device.

151

E0.2

A/D measurement overrun - timeout.

If problem persists, replace device.

152

E0.9

Probe EEPROM is uninitialized.

Bad probe A/D calibration.

159

Displayed when battery voltage is too low.

160

Displayed when battery voltage is too
high.

161

E4.2

Reference power supply malfunction.

If problem persists, replace device.

162

E4.8

Device not calibrated.

Calibrate device.

163

E4.9

Missing probe well - cycle will not start.

Insert probe well.

165

E4.3

Device EEPROM save failure.

Verify that the batteries are fresh. Try to
make changes again. If problem persists,
replace device.

166

E0.8

EEPROM CRC Failure.
(CONFIG_TRANSFER_FAILURE)

Verify that the batteries are fresh. Try
again, if problem persists, replace the
component that is indicated.

167

E4.4

Device EEPROM read/save failure.
(CONFIG_START_FAILURE)

Verify that the batteries are fresh. Try to
make changes again. If problem persists,
replace device.

168

E4.5

Device EEPROM read/save failure.
(CONFIG_SLAVE_ACK_FAILURE)

Verify that the batteries are fresh. Try to
make changes again. If problem persists,
replace device.

Troubleshooting

Welch Allyn Spot Vital Signs LXi

Table 4. SureTemp Plus Temperature Error Codes
Internal
Event Log
Code
Number

Displayed
Internal Event Log Description
Device Code

Corrective Action

169

E4.6

Device EEPROM read/save failure.
(CONFIG_MASTER_ACK_FAILURE)

Verify that the batteries are fresh. Try to
make changes again. If problem persists,
replace device.

170

E0.6

Probe EEPROM read failure.
(CONFIG_NULL_CHAR_FAILURE)

Verify that the batteries are fresh. Try to
make changes again. If problem persists,
replace device.

171

Device EEPROM access failure.
(CONFIG_ACQUIRE_FAILURE)

Try another predict cycle. If problem
persists, replace probe.

172

Device EEPROM access failure.
(CONFIG_RELEASE_FAILURE)

Try another predict cycle. If problem
persists, replace probe.

173

Device EEPROM access failure.
(CONFIG_INVALID_PTR_FAILURE)

Try another predict cycle. If problem
persists, replace probe.

174

E4.7

Device EEPROM initialization failure.
(CONFIG_INITIALIZE_FAILURE)

If problem persists, replace device.

175

E0.7

Probe EEPROM is un-initialized.
(CONFIG_UNINITIALIZED_PROBE)

Verify that the batteries are fresh. If
problem persists, replace probe.

180

E5.0

Heater stuck on. (ERROR_HEATER_ON)

If problem persists, replace device.

181

E5.0

Heater stuck off. (ERROR_HEATER_OFF)

If problem persists, replace device.

182

E5.0

Heater on when should be off.
(ERROR_HEATER_VOLTAGE_HIGH_Q)

If problem persists, replace device.

183

E5.0

Heater on when should be off.
(ERROR_HEATER_VOLTAGE_Q_HIGH_
IMPEDANCE)

If problem persists, replace device.

184

E5.0

Heater is off when it should be on.
(ERROR_HEATER_VOLTAGE_LOW)

If problem persists, replace device.

185

E5.2

Heater hardware failsafe failure.
(ERROR_HEATER_FAILSAFE)

If problem persists, contact Technical
Service.

Table 5. SpO2 Error Codes
Internal
Event Log
Code
Number

Displayed
Internal Event Log Description
Device Code

Corrective Action

Missing or disconnected sensor.

Adjust or replace sensor.

No pulse from sensor.

Adjust or replace sensor.

Communications failure.

Retake reading; contact Technical
Service.

5
6

8-second timeout interval
C8

Defective or bad SpO2 sensor.

Replace sensor.

SpO2 time limit exceeded.

Remove sensor from patient.

Service Manual

Troubleshooting

Table 6. Comms Errors
Internal
Event Log
Code
Number

Displayed
Internal Event Log Description
Device Code

Corrective Action

1000

Err

Invalid Operation in this Context.

Internal error, contact Technical Service.

1001

Err

Auto zero in progress.

Internal error, contact Technical Service.

1002

Err

Bad checksum.

Internal error, contact Technical Service.

1003

Err

Unimplemented command.

Internal error, contact Technical Service.

1004

Err

Buffer Overflow.

Internal error, contact Technical Service.

1005

Err

Overrun error.

Internal error, contact Technical Service.

1006

Err

Wrong data count.

Internal error, contact Technical Service.

1007

Err

FPROM erase error.

Internal error, contact Technical Service.

1008

Err

FPROM programming error

Internal error, contact Technical Service.

1009

Err

Bad Motorola record.

Internal error, contact Technical Service.

1010

Err

A/D channel locked.

Internal error, contact Technical Service.

1011

Err

RTC not present.

Internal error, contact Technical Service.

1012

Err

Attempt to reference nonexisting cycle.

Internal error, contact Technical Service.

1013

Err

Data range error.

Internal error, contact Technical Service.

1014

Err

Alarm pair range error.

Internal error, contact Technical Service.

1015

Err

No POST error to clear.

Internal error, contact Technical Service.

1016

Err

Can’t clear this POST error.

Internal error, contact Technical Service.

1017

Err

Command not command type.

Internal error, contact Technical Service.

1018

Err

NAK from ST3800 protocol.

Internal error, contact Technical Service.

1019

Err

No wireless link.

Internal error, contact Technical Service.

Table 7. Comms Host Errors
Internal
Event Log
Code
Number

Displayed
Internal Event Log Description
Device Code

Corrective Action

2001

Err

Timeout.

Internal error, contact Technical Service.

2002

Err

Incorrect response header.

Internal error, contact Technical Service.

2003

Err

Incorrect response checksum.

Internal error, contact Technical Service.

2004

Err

Too much received data.

Internal error, contact Technical Service.

2005

Err

User cancelled.

Internal error, contact Technical Service.

2006

Err

User paused.

Internal error, contact Technical Service.

Troubleshooting

Welch Allyn Spot Vital Signs LXi

Table 8. Printer Errors
Internal
Event Log
Code
Number

Displayed
Internal Event Log Description
Device Code

Corrective Action

5400

Err

Problem with the printer

Check all options; if problem persists,
contact Technical Service.

5401

Err

Printer is not responding.

5402

Err

Displayed when print started and printer is Printer head will not shut all the way or
out of paper.
too much paper.

5403

Err

Displayed when printing started and print
head is not closed in place.

Add paper.

Table 9. Spot Vital Signs LXi Errors
Internal
Event Log
Code
Number

Displayed
Internal Event Log Description
Device Code

5500

Corrective Action

Unknown error code.

5501

Err

Displayed when battery is too low for unit Charge battery; use wall transformer.
to continue operating.

5502

Err

Key stuck error causing the unit to be
automatically shut down.

Service Manual

Troubleshooting

Table 10. 802.11 b Radio Errors
LED

LED Color

Function

Power

Off

Bridge is not receiving power.

Red

Bridge failed its Power On Self Test (POST) and is not configured for
wireless communication.

Amber

Bridge passed its POST but is not configured for wireless
communication.

Green

Bridge passed its POST and is configured for wireless communication.

Off

Bridge is not receiving power.

Red

Bridge is searching for an Access Point.

Green

Wireless network and MAC have associated with an Access Point.

Off

No power or no wireless TCP session is established and no physical
serial connection is detected.

Red

No wireless TCP sesion is established; a physical connection is detected.

Blinking Red

A physical serial connection was detected and there is serial traffic
present on that connection, but no wireless TCP session is established.

Amber

A wireless TCP connection is established but no physical serial
connection is detected (i.e. no serial cable is attached to the Bridge).

Blinking Green

A wireless TCP session is established, a physical serial connection is
detected, and the Bridge is transmitting or receiving data across the
wired serial port.

Green

A wireless TCP session is established, a physical serial connection is
detected, but there is n o active data movement across the wired serial
port.

Link

Comm

NOTE:The 802.11 a/b/g radio has no functional LED displays.

Radio Test
Refer to Manufacturer’s Directions for Use.

Troubleshooting

Welch Allyn Spot Vital Signs LXi

Service Work Checklist
Spot Vital Signs
Model Number

Serial Number

Test

BP Cycle Count

Test Data

Technician

Date

Pass/Fail

Test Specification

Unit SW Version
SPO2 SW Version
Thermometry SW Version
Unit Pressure @ 0 mmHg

+/- 1 mmHg

Unit Pressure @ 50 mmHg

+/- 1 mmHg

Unit Pressure @ 150 mmHg

+/- 1.5 mmHg

Unit Pressure @ 250 mmHg

+/- 2.0 mmHg

Test Voltage @ 5.5 V

+/- 0.1 VDC

Current Test – Sleep State

< 0.5 A

Current Test – Patient DAQ

< 1.25 A

Current Test – Valve Pump

< 2.0 A

Noise Level

< 0.05 mmHg

Button Test

Pass/Fail

Interface Test

Pass/Fail

Leak Test

<= 6mmhg in 15 seconds

Dump Test

< 10 Seconds

Inflation Test

< 7 Seconds

Valve Control Test

Pass/Fail

Over Pressure Test

296 to 329 mmHg

SPO2 Sensor - Masimo

81% +/- 3% 61bpm +/- 1bpm

SPO2 Sensor - Nellcor

90% +/- 1% 60bpm +/- 1bpm

Temperature Calibration Suretemp Plus

96.8 +/- 0.2F 105.8 +/- 0.2F

Temperature Calibration Braun Pro 4000

96.8 +/- 0.2F 105.8 +/- 0.2F

Temperature Cal Key Suretemp Plus

97.3 +/- 0.2 F

Radio Ping Test

Pass or Fail

Pass

Service Manual

Troubleshooting

Radio Configuration Utility
This CD configures the Spot Vital Signs LXi Radio to a local network.Refer to DFU.

Troubleshooting

Welch Allyn Spot Vital Signs LXi

Supplies and Accessories

Blood Pressure
Table 1. Reusable Blood Pressure Cuffs (1 per pack)
REF

Size

REF

Size

4500-01

Child

4500-03

Large Adult

4500-02

Adult

4500-04

Thigh

Table 2. Reusable Blood Pressure Cuffs (1 per pack)
REF

Size

REF

Size

REUSE-07-2MQ

Infant

REUSE-11-2MQ

Adult

REUSE-08-2MQ

Small Child

REUSE-12-2MQ

Large Adult

REUSE-09-2MQ

Child

REUSE-13-2MQ

Thigh

REUSE-10-2MQ

Small Adult

Table 3. Disposable Blood Pressure Cuffs (5 per box)
REF

Size

REF

Size

SOFT-07-2MQ

Infant

SOFT-11-2MQ

Adult

SOFT-08-2MQ

Small Child

SOFT-12-2MQ

Large Adult

SOFT-09-2MQ

Child

SOFT-13-2MQ

Thigh

SOFT-10-2MQ

Small Adult

Table 4. Miscellaneous Supplies and Accessories
REF

Description

REF

Description

4500-30

Blood Pressure Hose (5ft/1.5M)

4500-31

Blood Pressure Hose (10ft/3M)

4500-32

Blood Pressure Hose (8ft/2.4M)

Supplies and Accessories

Welch Allyn Spot Vital Signs LXi

Temperature
Table 5. SureTemp Plus
REF

Description

02895-000

SureTemp Plus Oral Probe and Well (9 feet/2.7M)

02895-100

SureTemp Plus Rectal Probe and Well (9 feet/2.7M)

02894-0000

SureTemp Plus Oral Well

02894-1000

SureTemp Plus Rectal Well

06138-000

SureTemp Plus Temperature Calibration Key

01802-110

9600 Plus Calibration Tester

05031-101

Disposable SureTemp Plus Probe Covers (1,000 covers, packaged 25/box)

20500-025M

Probe Cover-Box 25

400194

Assy, Suretemp Plus Components, Spot Vital Signs LXi

400195

PCA, Suretemp Plus OEM without EDAC Calibrated

400196

PCA, EDAC, Spot Vital signs LXi

Table 6. Braun ThermoScan PRO 4000
REF

Description

04000-200

Braun ThermoScan PRO 4000 Thermometer (for North America, South America, and
Asia Pacific)

04000-600

Braun ThermoScan PRO 4000 Thermometer (for Europe, Middle East, and Africa)

05075-800

Braun ThermoScan PRO 4000 Disposable Probe Covers (Case of 800 covers for North
America, South America, and Asia Pacific)

04000-800

Braun ThermoScan PRO 4000 Disposable Probe Covers (Case of 800 covers for Europe,
Middle East, and Africa)

01802-110

9600 Plus Calibration Tester

53020-0000

Braun ThermoScan PRO 4000 Rechargeable Battery Pack

4500-53

Braun Unlocking Key

4500-54

Repair-Braun with rechargeable batteries

Service Manual

Supplies and Accessories

Pulse Oximetry
Masimo Accessories
Table 7. Adhesive Sensors: Single-Patient Use
Catalog #
NEO-WRAP-RP
LNCS-INF-3
INF-WRAP-RP

Description

LNCS-ADTX

Replacement Wrap Infant Adhesive

YI-FM

Multisite Foam Wrap AD/PED/NEO, YI Sensor

LNCS-NEO-L-3

>30 kg

Disposable Adhesive Finger Sensor-Infant

Multisite Adhesive Wrap AD/PED/NEO, YI
Sensor

LNCS-TC-I

Quantity

Replacement Wrap Neo Adhesive

YI-AD

LNCS-YI

Weight Range

Multisite Reusable Sensor
Reusable Ear Sensor
Disposable Adhesive Finger Sensor- NEO/Adult

LNCS-ADTX

Adhesive Finger Sensor - Adult (20 per case)

LNCS-PDTX

Adhesive Finger Sensor - Pediatric (20 per case)

10 to 50 kg

LNCS-PDTX

LNCS INF-L

Adhesive Finger Sensor - Infant (20 per case)

3 to 20 kg

LNCS INF-L

LNOP-ADT

Adult sensor

>66 lbs (30 kg)

LNOP-PDT

Pediatric sensor

22 to 110 lbs
(10 to 50 kg)

LNOP-NEO

Neonatal sensor

<22 lbs (10 kg)

SofTouch neonatal preterm sensor

<2.2 lbs (1 kg)

Weight Range

Quantity

>66 lbs (30 kg)

LNOP-NEOPT

Table 8. Reusable Sensor
Catalog #

Description

LNCS-TC-I

Reusable Ear Sensor

LNCS-YI

Multisite Reusable Sensor

LNCS-DCI

Finger sensor - adult

LNCS-DCIP

Finger sensor - pediatric

10 to 50 kg

LNOP-DCI

Finger clip probe - adult

>66 lbs (30 kg)

LNOP-DCIP

Finger clip probe - pediatric

10 to 50 kg

Weight Range

Quantity

Table 9. Sensor Cables
Catalog #

Description

LNC-4-WA

4-foot cable with DB-9 connector for LNCS

LNC-10-WA

10-foot cable with DB-9 connector for LNCS

4-foot cable with sensor connector

PC-04

Supplies and Accessories

Welch Allyn Spot Vital Signs LXi

Table 9. Sensor Cables
Catalog #

Description

Weight Range

Quantity

PC-08

8-foot cable with sensor connector

PC-12

12-foot cable with sensor connector

Service Manual

Supplies and Accessories

Nellcor Accessories
Table 10. OxiMax Adhesive Sensors: Single-Patient Use
Catalog #

Description

Weight Range

Quantity

MAX-AI

MAX-A Adhesive Sensor, adult

>66 lbs (30 kg)

Case of 24

MAX-PI

MAX-P Adhesive Sensor, pediatric

22 to 110 lbs
(10 to 50 kg)

Case of 24

MAX-II

MAX-I Adhesive Sensor, infant

6.5 to 44 lbs
(3 to 20 kg)

Case of 24

MAX-RI

MAX-R Adhesive Sensor, adult nasal

>110 lbs (50 kg)

Case of 24

Table 11. OxiMax OxiCliq® Sensors: Reusable Cable with Adhesive Sensor Bandage
Catalog #
OC-3
OXICLIQ-PI

Description
OxiCliq Sensor Cable (3 ft / 91cm)
OxiCliq P, pediatric

Weight Range

Quantity

N/A

22 to 110 lbs
(10 to 50 kg)

Case of 24

Table 12. OxiMax Resuable Sensors
Catalog #

Description

Weight Range

Quantity

DS-100A

Durasensor® DS-100A finger-clip sensor, adult

>88 lbs (40 kg)

OXI-A/N

Oxiband® OXI-A/N, adult/neonatal

< 6.5 lbs or > 88 lbs
(<3 kg or >40 kg)

OXI-P/I

Oxiband OXI-P/I, pediatric/infant

6.5 lbs to 88 lbs
(3 to 40 kg)

D-YS

Dura-Y® D-YS, multisite sensor

>2.2 lbs (1 kg)

D-YSE

D-YSE ear clip for Dura-Y sensor

>66 lbs (30 kg)

D-YSPD

PediCheck™ D-YSPD pediatric spot-check sensor

6.5lbs to 88 lbs
(3 to 40 kg)

Weight Range

Quantity

N/A

Table 13. OxiMax Sensor Cables
Catalog #
DOC-10

Description
DOC-10 (10 ft/3M)

Supplies and Accessories

Welch Allyn Spot Vital Signs LXi

Miscellaneous
REF

Description

4500-60

Mobile Stand, Spot Vital Signs LXi

4500-62

Wall Mount, Spot Vital Signs LXi

4500-84

Lead Acid Battery

705310

Directions for Use

705298

Quick Reference Card

4500-89

Service Manual

4500-11

Child Inf. Bag, 2 Tube Monitor

4500-12

Adult Bag, 2 Tube Monitor

4500-13

Large Adult Inf. Bag, 2 Tube Monitor

4500-14

Thigh Inf. Bag, 2 Tube Monitor

4500-75

Kit, Desk Plate, Spot Vital Signs LXi

4500-89

Service Manual, Spot Vital Signs LXi

4500-150E

In-Service CD, Spot Vital Signs LXi

4500-100

Carrying Case , Spot Vital Signs LXi

4500-101A

AC Power Transformer (desktop transformer, line cord not included)

4500-200

Cuffkit, Child, Adult, Thigh, 2T Cuff & Bag

4500-202

Cuffkit, Small Child, Child, Small Adult 2T

4500-400

Line Cord (United States/Canadian/Japanese version)

4500-402

Line Cord (European version)

4500-404

Line Cord (United Kingdom version)

4500-406

Line Cord (Australian Version)

4500-408

Line Cord (South African version)

4500-450

Transformer Mount, Spot Vital Signs LXi

4500-500

Kit, Printer, Spot Vital Signs LXi

4500-505

Printer Rechargeable Replacement Battery

4500-510

Printer Paper (10 rolls)

4500-520

Label Paper (10 rolls) and Cleaning Kit

4500-900

Kit, Dev Conn SDK Developers

4500-905

Repair Tool Software CD Kit

4500-906

Spot Vital Signs LXi Configuration CD

4500-907

Spot Vital Signs LXi Firmware Loader CD

4500-915

Image Team 4600 2D Bar Code Scanner Kit

4500-920

Radio Kit

4500-921

Radio Directions for Use

4500-922

802.11 a/b/g Spot Vital Signs LXi Radio Kit

Service Manual

Supplies and Accessories

REF

Description

4500-923

Spot Vital Signs LXi a/b/g Radio Directions for Use

4500-925

USB 2.0 Cable for Wired Connectivity

4500-926

Cable for Wired Connectivity, Keyspan (USB to serial adapter)

4500-927

Spot Vital Signs LXi USB/serial Cable Kit

5200-08

Calibration T Fitting

Supplies and Accessories

Welch Allyn Spot Vital Signs LXi

Service Contracts
REF

Description

4500-BT0

One-Year Service Contract, BP & Temperature

4500-BTS

One-Year Service Contract, BP & Temperature

Field Replaceable Units
The following list identifies the available FRUs for Spot Vital Signs LXi. To order an FRU,
contact Welch Allyn Technical Support.
Table 1. Spot Vital Signs LXi Base Components
Component Number

Object Description

400163

ASSY, POWER HARNESS, Spot Vital Signs LXi

400170

ASSY, PUMP HARNESS

400198

PCA, SERIAL INTERFACE, Spot Vital Signs LXi

400199

PCA, MAIN, Spot Vital Signs LXi

400200

BASE UNIT, SURETEMP, NELLCOR - Spot Vital Signs LXi

400203

BASE UNIT COMPONENTS, Spot Vital Signs LXi

400207

LANGUAGE COMPONENTS, ENG, Spot Vital Signs LXi

4500-901

Spot Vital Signs LXi Pump and Pump Tubing Kit

4500-902

Spot Vital Signs LXi Pump Tubing Kit

4500-84

Lead Acid Battery

4500-101A

AC Power Transformer

400387

PBCA BP OEM, (MOD F)

400720

ASSY, BALLAST HARNESS, Spot Vital Signs LXi

400732

ASSY, BATTERY, Spot Vital Signs LXi

401082

Assy, Bezel and Window, Spot Vital Signs LXi

401250

Assy, Fan Unit Cooling

404940

PCA, Main, Spot Vital Signs LXi

421051-12

TUBING,1/8 X 1/4 X 2.50

421051-9

TUBING,1/8 X 1/4 X 0.95

59P586

FOOT, RUBBER

620028-E

LABEL, CAUTION

620217

FITTING, "T", 1/8 X 1/16X 1/8

700101

HSG, HANDLE, LXi

700102

HSG, HANDLE INSERT, LXi Ultra

700103

HSG, REAR, LXi

700105

HSG, BATT DOOR, Spot Vital Signs LXi

700110

BUMPER, LCD, Spot Vital Signs LXi

Field Replaceable Units

Welch Allyn Spot Vital Signs LXi

Table 1. Spot Vital Signs LXi Base Components
700114

SWITCH ARRAY, Spot Vital Signs LXi

700119

INVERTER, LCD

705653

HOUSING, FRONT, Spot Vital Signs LXi

704423

HSG, PANEL, SPO2-BLANK, Spot Vital Signs LXi

4500-89

SERVICE MANUAL, Spot Vital Signs LXi

401427

LABEL, ICON ID, Spot Vital Signs LXi

700863

CBL,FLX, 1/2mm,15POS,1.0"

704375

FLEX, MAIN, Spot Vital Signs LXi

703956

LABEL, BATTERY

701040

FITTING, PLASTIC L, 1/16 X 1/16

701502

Valve,Pneumatic,6PSI,5V,TH

703077

STANDOFF, PCB, BROACHING, #4 X .500 LG

703118

BATTERY CLIP, AA, SINGLE

703354

DISPLAY,LCD,320X240,BLITE,MONO,3.3V,5.7"

703355

FILTER, AIR, 1/8 BARBS

705284

Spot Vital Signs LXi Warranty Card English

705298

QRC, Spot Vital Signs LXi English

705310

DFU, Spot Vital Signs LXi English

703842

TUBING, SILICONE, .063ID X .125OD X 5.50

Table 2. SureTemp Plus Components
Component Number

Object Description

02692-100

PROBE ASSY,ORAL 9FT

02894-0000

ASSY,PRB WLL,BLUE,OEM,M690_692

400194

ASSY, SURETEMP+, COMPONENTS, Spot Vital Signs LXi

400195

PCA, SURETEMP+, OEM W/O EDAC, CALIBRATED

400196

PCA, EDAC, Spot Vital Signs LXi

700111

HOUSING, THERM OEM POD, Spot Vital Signs LXi

700112

PLATE, POD MOUNTING, Spot Vital Signs LXi

700858

CBL,FLX,1MM,6POS

700859

CBL,FLX,1MM,8POS

70999-0000

LABEL,SURETEMP TECHNOLOGY

02692-100

PROBE ASSY,ORAL 9FT

Service Manual

Field Replaceable Units

Table 3. Braun ThermoScan PRO 4000 Components
Component Number

Object Description

400652

PCA, BRAUN INTERFACE, Spot Vital Signs LXi

400831

BRAUN COMPONENTS, Spot Vital Signs LXi

700112

PLATE, POD MOUNTING, Spot Vital Signs LXi

700820

HSG, BOTTOM, BRAUN POD, Spot Vital Signs LXi

700822

HSG, BRAUN POD, Spot Vital Signs LXi

704365

WINDOW, BRAUN POD, Spot Vital Signs LXi

700859

CBL,FLX,1MM,8POS

703161

SECURITY LOCK, BRAUN POD, Spot Vital Signs LXi

703162

LATCH, BRAUN POD, Spot Vital Signs LXi

703164

CONTACT, BRAUN POGO, Spot Vital Signs LXi

703165

SPRING, COMPRESSION

703192

COVER, BRAUN SECURITY, Spot Vital Signs LXi

711

Table 4. Masimo SpO2 Components
Component Number

Object Description

008-0648-00

MASIMO LNOP-DCI ADULT REUSABLE SENSOR

008-0960-00

MASIMO-LNCS-DCI ADULT REUSABLE SENSOR

008-0692-01

MASIMO - 8' INTERFACE CABLE

008-1013-00

SP02 CABLE, LNCS, MASIMO, MINI-D, 4’, EXP

400192

PCA, MASIMO OEM, Spot Vital Signs LXi

400205

MASIMO SPO2 COMPONENTS, Spot Vital Signs LXi

400555

PCA, MASIMO ADAPTOR, Spot Vital Signs LXi

400610

ASSY, CABLE, FLAT FLEX, SPO2

704422

HSG, PANEL, SPO2-MASIMO, LXi

705651

HOUSING, FRONT MASIMO, Spot LXi

711350

MASIMO MS-11 SP02, STD, SW V4.6.0.2

LNC-10-WA

MASIMO, 10’ EXT CABLE, LNCS/DB-9

LNC-4-WA

MASIMO, 4’ EXT CABLE, LNC/DB-9

LNCS-ADTX

MASIMO, LNCS-ADTX ADULT ADHSV, 20 CASE

LNCS-DCI

MASIMO, LNCS-DCI ADULT REUSABLE SENSOR

LNCS-DCIP

MASIMO, LNCS-DCIP PED REUSABLE SENSOR

LNCS-INF-L

MASIMO, LNCS-INF-L INFANT ADHSV, 20 CASE

LNCS-PDTX

MASIMO, LNCS-PDTX PED ADHSV, 20 CASE

LNOP-ADT

DISPOSABLE ADHESIVE FINGER CLIP PROBE-AD

LNOP-DCI

REUSABLE FINGER CLIP PROBE-ADULT

LNOP-DCIP

REUSABLE FINGER CLIP PROBE-PEDIATRIC

Field Replaceable Units

Welch Allyn Spot Vital Signs LXi

Table 4. Masimo SpO2 Components
Component Number

Object Description

LNOP-NEO

DISP ADHESIVE FINGER CLIP PROBE-NEONATE

LNOP-NEOPT

DISPOSABLE FINGER SENSOR-NEONATE

LNOP-PDT

DISP ADHESIVE FINGER CLIP PROBE-PEDIATRIC

PC-04

4-FOOT CABLE W/ SENSOR CONN

PC-08

8-FOOT CABLE W/ SENSOR CONN

PC-12

12-FOOT CABLE W/ SENSOR CONN

Table 5. Nellcor SpO2 Components
Component Number

Object Description

400183

PCA, NELCOR OEM, Spot Vital Signs LXi

400201

NELLCOR SPO2 COMPONENTS, Spot Vital Signs LXi

400610

ASSY, CABLE, FLAT FLEX, SPO2

620377-1

"NELLCOR WORKS HERE" LABEL

704421

HSG, PANEL, SPO2-NELLCOR, LXi

704870

EVSPNELLCOR NELL3 PULSE OXIMETRY

DOC-10

CABLE, SPO2 EXTENSION, NELLCOR

DEC-4

EXTENSION CABLE 4 FT.

DS-100A

DURASENSOR,ADULT,DS-100A

D-YS

DURA-Y OXYGEN TRANSDER (1 sensor-40 wraps)

D-YSE

EAR CLIP (USE WITH DURA-Y SENSOR)

D-YSPD

PEDICHECK PEDIATRIC SPOT CHECK

MAX-AI

NELLCOR OXIMAX ADULT SENSOR (SU CS/24)

MAX-II

NELLCOR OXIMAX INFANT SENSOR (SU CS/24)

MAX-PI

NELLCOR OXIMAX PED SENSOR (SU CS/24)

MAX-RI

NELLCOR OXIMAX ADULT NASAL SEN (CS/24)

OC-3

NELLCOR OXICLIQ SENSOR CABLE

OXI-A/N

NELLCOR OXIBAND AD/NEO TRANSDUCER 1/50

OXICLIQ-PI

PEDIATRIC OXYGEN TRANSDUCER

OXI-P/I

NELLCOR OXIBAND PED/INF TRANSDUCER 1/50

Service Manual

Field Replaceable Units

Table 6. Radio Components
Component Number

Object Description

706514

Radio

4500-915

Image Team 4600 2D Barcode Scanner Kit

703878

Null Modem 9-Pin M/F 4-40

4500-920

Kit, Spot Vital Signs LXi 802.11 b Radio

4500-921

802.11 b radio Directions for Use

4500-922

Kit, Wireless Spot Vital Signs LXi 802.11 a/b/g Radio

4500-923

802.11 a/b/g Radio Directions for Use

4500-905

Repair Tool CD, Spot Vital Signs LXi

4500-906

Spot Vital Signs LXi Configuration CD

4500-907

Spot Vital Signs LXi Firmware Loader CD

4500-925

Cable for wired connectivity

4500-926

Cable for wired connectivity, Keyspan (USB to serial adapter)

4500-927

USB 2.0/serial cable kit

100

Field Replaceable Units

Welch Allyn Spot Vital Signs LXi

101

Disassembly and Repair
This chapter provides the instructions for removing and replacing serviceable modules in
the Spot Vital Signs LXi.
In general, re-assembly procedures are the reverse order of the disassembly procedures.
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.
Note

Always disconnect the sealed lead-acid battery in the Spot Vital Signs LXi before
performing any repair function.

Tool list
Description

Part Number

Qty

Source

Blood Pressure Test Volume Repair Fixture

401028

Welch Allyn

Spot Vital Signs LXi Repair Software

401710

Welch Allyn

Serivce Manual, Spot Vital Signs LXi

4500-89

Welch Allyn

Spot Vital Signs LXi Directions for Use

705310

Welch Allyn

802.11 b Radio

4500-920

Welch Allyn

802.11 b Radio Directions for Use

4500-921

Welch Allyn

802.11 a/b/g Radio

4500-922

Welch Allyn

802.11 a/b/g Radio Directions for Use

4500-923

Welch Allyn

Spot Vital Signs LXi Manufacturing Process
Specifications

70012082

Welch Allyn

Tester, Calibration, 9600 Plus

01802-110

Welch Allyn

SureTemp Oral Probe

02895-000

Welch Allyn

Blood Pressure Y-Tube, No Fittings 1/8 Tube

5082-183

Welch Allyn

Spot Vital Signs LXi Work Instructions

MPD WI-PS-0090

Welch Allyn

Needle Nose Pliers

Tool/Supply Store

Wire Cutter

Tool/Supply Store

Tweezers

Tool/Supply Store

#2 Phillips Screwdriver

Tool/Supply Store

102

Disassembly and Repair

Welch Allyn Spot Vital Signs LXi

Description

Part Number

Qty

Source

T10 Torx Driver

Tool/Supply Store

4” PVC Pipe

Tool/Supply Store

Soldering Station

Tool/Supply Store

Cable Tie Tool - T9921

GS2B

Marsh Electronics
+1 800 877-8919

*Setra Pressure Meter

2270-01

Setra +1 800 257 3872

*Netech Pressure Meter

2000 in

Netech +1 800 547 6557

Nellcor Sensor Ext Cable (4’ Cable)

Dec-4

Nellcor +1 800 635 5267

Nellcor Sensor Ext Cable (8’ Cable)

Dec-8

Nellcor +1 800 635 5267

Nellcor Sensor

DS-100A

Nellcor +1 800 635 5267

Masimo SpO2 Tester

1795

Masimo +1 800 326-4890

Nellcor SRC-MAX SpO2 Tester

SRC-MAX

Nellcor +1 800 635 5267

Masimo Patient Cable

1005

Masimo +1 800 326-4890

Masimo Adult SpO2 Reusable Sensor

1269

Masimo +1 800 326-4890

Digital Volt Meter with 4 1/2 Digit Display

Electronics Supply Store

Power Supply: 0-20 Vdc adjustable with 0-3A
output

Electronics Supply Store

Wireless Router

Electronics Supply Store

Ethernet Cable

Electronics Supply Store

IBM compatible computer Windows 2000, XP,
NT4

* Only requires one of the pressure meters

To disassemble Spot Vital Signs LXi:
1.

Disconnect the power and all accessories from the Spot Vital Signs LXi.

2. Remove the four screws holding the battery door using a phillips-head screwdriver.
Remove the battery door to expose the battery.
CTIONS
ort

MAT: 703956

Top, back housing
screws (2 places)
II
I

Battery Door
Screws (4 places)

3. Tip the Spot Vital Signs LXi backward and slide the battery out. Disconnect the oneway connector.

Service Manual

Disassembly and Repair

103

4. Remove the two screws inside the battery housing that are identified with arrows
molded into the housing and the two screws at the top of the back upper housing.
5. Hold the device together, lay the back housing on the bench, and carefully lift the top
housing off.

6. Remove the screw and slightly lift the circuit board from the right facing side and
disconnect the flex cable (J103).

Observe the locations of the two tubes before disconnecting. Lift and disconnect the
wire harnesses and the pneumatic tubing. The two wire harnesses are a 6-wire
harness that connects to J104 and a 2-wire harness that connects to J80 on the
small, mounted blood pressure board.

104

Disassembly and Repair

Welch Allyn Spot Vital Signs LXi

8. Disconnect the red electrical connector and the gold ribbon connector. This is located
on the main board. Lift up the tab on the white cable retainer so cable can slide out
after it is unplugged.
Gold Connector

Red Connector

9. Lift the flap on the beige connector (large ribbon cable) to remove the main board.
This releases the serial board cable from connector J108.

J108

Note

FOR MODELS NUMBERS (45MT0, 45ME0) ONLY: With diagonal cutting pliers
cut jumper JP2 twice so that it is open. Cut it on each end on the dotted lines as
illustrated, so that it is open connection.

Service Manual

Disassembly and Repair

Key Pad Disassembly
1.

Gently pull the button switch array out of the cover.

2. Align and push the new button switch array into place.

105

106

Disassembly and Repair

Welch Allyn Spot Vital Signs LXi

SpO2 Circuit Board Disassembly
Note

To assure proper SpO2 operation, replace the SpO2 board using only the Welch
Allyn specified part.
To assure patient electrical isolation, after the main board is nearly back in
position, verity that the SpO2 flex cable is freely floating in space and is not
pressed up against the main board.

Masimo
1.

Lay the LCD flat on an ESD mat.

2. Find the double-stack of circuit boards and remove the four corners screws. Carefully
lift the circuit board straight up.

3. Remove the three screws on the circuit board located behind the LCD.

Service Manual

Disassembly and Repair

107

4. Slightly rock the circuit board back and forth while lifting straight up.

5. Replace with a new circuit board.

Nellcor
1.

Lay the LCD flat on an ESD mat.

2. Remove the three screws on the circuit board located behind the LCD.

3. Slightly rock the circuit board back and forth while lifting straight up.

4. Replace with a new circuit board and set the dip switches to match the original board
(dip 1 and 2: up / dip 3 and 4: down).

108

Disassembly and Repair

Welch Allyn Spot Vital Signs LXi

Blood Pressure Circuit Board Disassembly
Note

When replacing the NIBP board see “To initialize the NIBP board:” on page 54 for
instructions.

Remove the four screws and carefully lift the circuit board straight up. There is one
stationary connector.

Service Manual

Disassembly and Repair

109

LCD Inverter Ballast Board Disassembly
This is a small board held in place with two-sided tape. It is located towards the bottom of
the main board. Remove the connector at each end and pull straight up while taking care
not to damage the board because the adhesive tape has considerable sticking strength.

LCD Disassembly
1.

Remove the main board. At the bottom of this board is a circuit board with a pink
connector at the bottom.

2. Pull the brown tabs of the top connector forward and remove the ribbon cable.
Inspect connector tabs for wear and replace if worn.
3. Turn the board over and pull back the soft rubber holders. Pull the cable from the lug
to remove the grounding strap and remove the LCD.

4. Replace with a new LCD.

110

Disassembly and Repair

Welch Allyn Spot Vital Signs LXi

Pump Disassembly
Note

For proper blood pressure operation, replace the pump using only the Welch Allyn
specifed part.
To assure patient electrical isolation, route the pump wires through the rear
housing clip feature (near the pump terminals) and held in place with a tiewrap to
the holes in the rear housing at the back of the battery compartment.
To assure patient electrical isolation, do not modify the length of the pump wires.

Snip the wire ties (2 places).

2. Disconnect the pneumatic tubing and unhook the wiring.
3. Replace with a new pump.

RS232-Communication Circuit Board Disassembly
1.

Remove the pneumatic connector and associated hoses from the pump and the two
screws in the rear housing. Remove the associated hoses.

2. Release the catch and remove the cover and inner handle assembly.
3. Remove the connection port panel.
4. Remove the two screws inside the back housing and the ribbon cable that hold the
RS232 board in place. Take care since the connector is easily broken.
5. Slide the board straight out and remove the wire harness.

6. Replace with a new circuit board.

Service Manual

Disassembly and Repair

111

Fan and Power Circuit Board Disassembly
Note

To prevent buildup of hydrogen gas, replace the fan using only the Welch Allyn
specified part.

This is a small board held in place with two-sided tape and one connector. Remove the
screw before disconnecting the connector.

Thermometry Circuit Board Disassembly
Caution To assure patient electrical isolation, trap the flex cable to the
thermometer pod behind the clip on the main housing adjacent to the main board
connection point.
Caution To assure patient electrical isolation, verify that the correct flex cable is
used to connect the thermometer pod to the main board. The Braun and
SureTemp Plus flex cables are slightly different in length and are not
interchangeable.
Caution To protect the user from high voltage, properly install the thermometer
pod insulating paper separating the LCD ballast wires from the housing crack.

SureTemp Plus
Caution Do not attempt to repair or clean the solder joints on either SureTemp
Plus board. Incorrect flux or technique can degrade thermomter accuracy.
1.

Remove the two screws located at the thermometer housing with a T-10 torx wrench.
Save the fish paper.

2. Locate the path of the notched tabs on the housing. Slide the housing up and out
following this path and set the case aside.

112

Disassembly and Repair

Welch Allyn Spot Vital Signs LXi

3. Remove the four screws from the mounting plate and save the fish paper. This
exposes the circuit board.

4. Remove the three Torx screws (T10) on the board (one on bottom and one on either
side of the probe well cover) and lift the board out of the housing and orient the part
as shown.

5. Disconnect all connectors and replace with a new board.
To replace the temperature connector, remove the one screw holding the temperature
board and connector. Verify the fish paper is properly mounted upon reassembly.
When replacing the SpO2/blood pressure housing, verify the orange and white twisted
wire is pushed as far into the handle housing as possible. Failure to do so can cause the
wires to stretch when the SpO2/blood pressure housing is inserted.

Service Manual

Disassembly and Repair

113

Braun ThermoScan PRO 4000
1.

Remove the two screws located at the thermometer housing with a T-10 torx wrench.
Save the fish paper.

2. Locate the path of the notched tabs on the housing. Slide the housing up and out
following this path and set the case aside.
3. Remove the four screws that hold the metal shield in place.

4. Remove the springs and posts. Carefully rock the board back and forth while lifting
straight up.

5. Disconnect all connectors and replace with a new board.
6. Reassembly is the reverse of disassembly.

114

Disassembly and Repair

Welch Allyn Spot Vital Signs LXi

115

Repair Test Specifications
This appendix refers to the Spot Vital Signs LXi without pneumatics (tubing and cuff),
temperature probe, SpO2 probe, or main battery attached, unless otherwise noted.
Use the Repair Software for the performing the tests on the Spot Vital Signs LXi. The
standard test voltage, unless otherwise stated is 6.5 Vdc (+0/-0.25 Vdc). Unless
otherwise stated, all calibrated volumes are ±10cc of the stated volume.

General Unit Test
A-D Noise Test
The A-D Noise Test is defined as the amount of noise on the Spot Vital Signs LXi A-D
pressure channel; over a 1 second sample time while 0.0 mmHg is applied to the Device
pressure port. The maximum limit is 0.050 mmHg.

Leak Test
The Leak Test is defined as the amount of pressure drop that is recorded over a 15-second
interval with a 100cc cylinder attached to the Spot Vital Signs LXi pressure port and that
volume having a stabilized pressure of 250 mmHg. The maximum limit is 6 mmHg.

Inflation Test
The Inflation Test is defined as the amount of time the Spot Vital Signs LXi pump can
inflate a 250 cc cylinder from 5 mmHg to 210 mHg. The maximum limit is 7 seconds.

Dump Test
The Dump Test is defined as the amount of time it takes Spot Vital Signs LXi to deflate a
500 cc cylinder from 260 mmHg to less than 15 mmHg. The maximum limit is 10
seconds.

Pneumatic Accuracy Test
Enter the Internal Configuration Mode to perform this test (see “Temperature Functional
Check” on page 58).
Perform an Auto-zero before starting this test (see “Temperature Functional Check” on
page 58). The Pneumatic Accuracy test is defined as the comparison of Spot Vital Signs
LXi’s pressure measurement and applied pressure at 0, 50, 150, and 250 mmHg. The

116

Repair Test Specifications

Welch Allyn Spot Vital Signs LXi

specification for each reading is within ±3 mmHg of the target pressure except for the 0
mmHg reading which is within ±1.0 mmHg.

Valve Control Test
Connect a 100 cc cylinder to the Spot Vital Signs LXi pressure port and pressurize to 160
mmHg. Give Spot Vital Signs LXi the commands to open the valve for 10 mmHg/s, 15
mmHg/s, and 25 mmHg/s. Record each pressure drop: 4 to 12 mmHg, 4 to 15 mmHg,
and 4 to 25mmHg, respectively.

Voltage Calibration
Calibrate the Spot Vital Signs LXi battery voltage measurement circuit at 5.5 Vdc (+0.1/0.0 Vdc).
After performing a successful battery measurement circuit calibration, Spot Vital Signs
LXi’s memory will store a calibration signature of up to four printable characters.

Blank Mode Current Test
The Blank Mode Current Test is defined as the amount of current drawn through the
battery terminals. All LCD segments, the back light, and the SpO2 mode are all turned off.
The limit is 200 mA maximum.

Back Light (Idle) Current Test
The Back Light Current Test is defined as the amount of current drawn through the
battery. All LCD segments and the back light are turned on while the SpO2 mode is turned
off. The limit is 400 mA maximum.

Valve/Pump Mode Current Test
The Valve/Pump Mode Current Test is defined as the amount of current that is drawn
through the battery terminals; Spot Vital Signs LXi is in the Blank Mode while the valve
and pump are actuated to on. The limit is 2.0 A maximum.

Interface Test
When given the proper commands, the Display Window will turn on or off all segments
and turn on or off the back light. When given the proper command, the buzzer sounds to
verify operation. The user determines the pass/fail criteria.

Temperature Option Requirements
Accuracy Test
Verify the accuracy of the temperature module is within ±0.2° F for readings with a nomal
temperature of 97.3° F (36.3° C) using a Cal Key (5200-25). Verify Spot Vital Signs LXi can
read a temperatures of 96.4° F (35.8° C) and 106° F (41.1° C) within ±0.3° F/±0.2° C using
a Welch Allyn 9600 Plus Calibrator.

Service Manual

Repair Test Specifications

117

Temperature Probe Test
Spot Vital Signs LXi displays “ORL” after you remove the blue thermometer probe from
the blue probe well.

SpO2 Option Requirements
These tests are only valid on Spot Vital Signs LXi models with the Masimo or Nellcor
SpO2 option.

SpO2 Functional Test
See “Masimo SpO2 Functional Check” or “Nellcor SpO2 Functional Check” on page 61
for the functional test.

SpO2 Mode Current Test
The SpO2 Mode Current Test is defined as the amount of current, less the Blank Mode
Current, that is drawn through the battery terminals, placing Spot Vital Signs LXi in the
Blank Mode, actuating the SpO2 mode and applying any SpO2 signal to the device. The
maximum limit is 120 mA maximum.

Fail Safe Test
Over Pressure Test
Verify that Spot Vital Signs LXi can detect over pressure on the pneumatic system
between 296.0 mmHg and 329 mmHg.

Over 15 mmHg
Verify that Spot Vital Signs LXi can detect static pressure over 15 mmHg for 180 seconds.

118

Repair Test Specifications

Welch Allyn Spot Vital Signs LXi

Reorder No. 4500-89
Material No.704432 Ver. D

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