Welch Allyn 300 Vital Signs, VSM 300 Service manual
Vital Signs Monitor
300 Series
Service Manual
Software version 1.2X
ii Welch Allyn Vital Signs Monitor 300 Series
Copyright 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
®
and Flexible Monitoring® are registered trademarks of Welch Allyn. POEM™ and FlexNet™ are trademarks of
Welch Allyn.
®
Nellcor
SET
and Oximax® are registered trademarks of Nellcor Puritan Bennett.
®
, LNCS®, and Masimo® are registered trademarks of Masimo Corporation. Possession or purchase of a Masimo SpO2equipped monitor 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.
Software in this product is copyright by 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 the nearest Welch Allyn representative:
USA 1 800 535 6663
+ 1 315 685 4560
Canada 1 800 561 8797 China + 86 216 327 9631
European Call Center + 353 46 906 7790 France + 331 6009 3366
Germany + 49 747 792 7186 Japan + 8133 219 0071
Latin America + 1 305 669 9003 Netherlands + 3115 750 5000
Singapore + 656 419 8100 South Africa + 2711 777 7555
United Kingdom + 44 207 365 6780 Sweden + 46 85 853 6551
Australia + 6129 638 3000
800 074 793
This device complies with Part 15 of the FCC rules and with the rules of the Canadian ICES-003. Operation is subject to the
following two conditions: (1) This device may not cause harmful interference and (2) this device must accept any interference
received, including interference that may cause undesired operation.
Caution! Changes or modifications not expressly approved by Welch Allyn could void the purchaser’s authority to operate
the equipment.
Reorder Part Number 810-2811-XX (CD, English)
Reorder Part Number 810-2812-XX (printed, English)
Manual Part Number 810-1651-02 Rev A, Jan 08
Welch Allyn, Inc.
8500 SW Creekside Place
Beaverton, OR 97008-7107 USA
Welch Allyn Ltd
Navan Business Park
Dublin Road, Navan
County Meath, Republic of Ireland
www.welchallyn.com
Printed in USA
Contents
1 - Safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
2 - Service overview. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
iii
General safety considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Electrostatic discharge (ESD) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Symbols . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Purpose and scope . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Technical support services . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Returning products . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Product configurations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Recommended service intervals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Service options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Related documents. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Service menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
3 - Functional verification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Functional verification overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Equipment required . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Functional verification procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Checklist and test results report form . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
4 - Troubleshooting and repair . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Troubleshooting chart . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Requirements for module-level repair and replacement . . . . . . . . . . . . . . . . . . . 35
NIBP characterization . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
Welch Allyn monitor service utility . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
5 - Disassembly procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
Procedures overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
Remove and disconnect the battery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56
Separate the front and rear chassis . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57
Disassemble the front chassis assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58
Remove the LCD display from the main board. . . . . . . . . . . . . . . . . . . . . . . . . . 60
Disassemble the rear chassis assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61
Remove the main board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62
Disassemble and remove the NIBP assembly . . . . . . . . . . . . . . . . . . . . . . . . . . 65
Remove and disassemble the printer assembly. . . . . . . . . . . . . . . . . . . . . . . . . 68
Disassemble the temperature module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76
Disassemble the Nellcor SpO
Disassemble the Masimo SpO
assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 79
2
assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 82
2
iv Contents Welch Allyn Vital Signs Monitor 300 Series
6 - Replacement parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 85
7 - Updates and service bulletins . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 95
DC power cable clamp . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 95
Index . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 97
1
1
Safety
All personnel must read and understand all safety information presented in this manual
before using or repairing the monitor.
Caution Use only the Welch Allyn Monitor Service Utility (810-1784-XX) with
this monitor.
Software service tools, such as the “Custom Repair Software” (part number
130S29E), distributed for use with previous models of the Vital Signs Monitor,
must not be used with the Model 300 Series. Use of any tool other than the
Welch Allyn Monitor Service Utility (810-1784-XX) may set the monitor in an
undefined and unrecoverable state.
United States federal law restricts this device to sale, distribution, or use by or on the
order of a licensed medical practitioner.
General safety considerations
Always consider the following safety points when using the monitor:
• Place the monitor and accessories in locations where they cannot harm the patient
should they fall from a shelf or mount.
• Do not connect more than one patient to a monitor.
• Do not connect more than one monitor to a patient.
• Do not use the monitor in an MRI suite or hyperbaric chamber.
• Do not autoclave the monitor.
• Accessories can be autoclaved only if the manufacturer’s instructions clearly approve
it. Many accessories can be severely damaged by autoclaving.
• Inspect the power adapter cord periodically for fraying or other damage. Replace the
adapter as needed. Do not operate the monitor from mains power if the adapter, the
adapter cord, or the cord plug is damaged.
• Frequently check all cables, both electrically and visually.
• To avoid explosion, do not operate the monitor in the presence of flammable
anesthetics.
• To ensure patient safety, use only accessories recommended or supplied by Welch
Allyn. (See Products and Accessories, part number 810-0409-XX.) Always use
accessories according to your facility’s standards and according to the manufacturer’s
recommendations and instructions. Always follow the manufacturer’s directions for
use.
2 Safety Welch Allyn Vital Signs Monitor 300 Series
• A monitor that has been dropped or otherwise damaged or abused must not be used
until it has been tested and verified by qualified service personnel for proper
operation.
• If the monitor detects an unrecoverable problem, an error code and a brief message
appear in the message display. Report all such errors to Welch Allyn.
• While under warranty, the monitor must be serviced only by a Welch Allyn service
technician.
Electrostatic discharge (ESD)
CAUTION
SENSITIVE ELECTRONIC DEVICES
DO NOT SHIP OR STORE NEAR STRONG
ELECTROSTATIC, ELECTROMAGNETIC,
MAGNETIC OR RADIOACTIVE FIELDS.
ATTENTION
OBSERVE PRECAUTIONS
FOR HANDLING
ELECTROSTATIC
SENSITIVE DEVICES
WARNING Electrostatic discharge (ESD) can damage or destroy electronic
components. Handle static-sensitive components only at static-safe workstation.
WARNING Consider all electrical and electronic components of the monitor as
static-sensitive.
Electrostatic discharge is a sudden current flowing from a charged object to another
object or to ground. Electrostatic charges can accumulate on common items such as
foam drinking cups, cellophane tape, synthetic clothing, untreated foam packaging
material, untreated plastic bags, and work folders, to name only a few.
Electronic components and assemblies, if not properly protected against ESD, can be
permanently damaged or destroyed when near or in contact with electrostatically charged
objects. When you handle components or assemblies that are not in protective bags and
you are not sure whether they are static-sensitive, assume that they are static-sensitive
and handle them accordingly.
• Perform all service procedures in a static-protected environment. Always use
techniques and equipment designed to protect personnel and equipment from
electrostatic discharge.
• Remove static-sensitive components and assemblies from their static-shielding bags
only at static-safe workstations—a properly grounded table and grounded floor mat—
and only when 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 from their protective bags and before
beginning any disassembly or assembly procedures.
Service manual Safety 3
Symbols
The symbols illustrated on the following pages appear on the monitor or in this document.
Documentation symbols
WARNING Indicates conditions that could lead to illness, injury, or death.
Caution In this manual, indicates conditions that could damage equipment or other property.
Caution On the product, means “Consult accompanying documentation.”
Certification and operation labels
This device has been tested and certified by the
Canadian Standards Association International to
comply with applicable U.S. and Canadian medical
safety standards.
The CE Mark and Notified Body Registration
Number signify that the device meets all essential
requirements of the European Medical Device
Directive 93/42/EEC.
Urgent alarm notification (output to Nurse Call
system)
Recycle used batteries properly and in accordance
with local regulations.
Do not dispose of batteries in refuse containers.
Australian Registered Importer Sealed lead-acid battery, 6V 4 Ah
Patient connections are Type BF, and protected
against defibrillation.
Shipping, storing, and environment labels
Keep this end of the package or shipping crate up. Protect the monitor from exposure to rain.
Do not expose the monitor to relative humidity
above this limit.
Fragile contents—handle with care. Limit stacking to this number of units.
Do not expose the monitor to temperatures
outside these limits.
Monitor connector labels
Temperature Probe Cable Connector SpO
Do not subject the monitor to altitudes outside
these limits.
SpO2 Sensor Cable Connector
2
RS232 Cable Connector AC Power Adapter Cable Connector
Nurse Call Cable Connector NIBP Hose Connector
4 Safety Welch Allyn Vital Signs Monitor 300 Series
ºC
ºF
M
Printer door label
Press to open the printer door Load paper this direction
The monitor front panel controls are described in more detail throughout this document.
Front panel controls
Set alarm limits Power on/off
Silence alarms Print patient data
SYS
DIA
SpO
2
message
window
ºC
Scroll up/down, Scroll forward/back,
Increase/decrease value
(The scroll icon appears as these two
arrows in the documentation.)
Set an NIBP automatic measurement
interval
Cycle to the next menu selections
Front panel displays and indicators
Systolic pressure
Diastolic pressure
Arterial hemoglobin oxygen saturation
Pulse rate pulse
amplitude
indicator
MAP (mean arterial pressure) Neonatal
Degrees Celsius Pediatric
Review patient data
Start/stop an NIBP cycle (AUTO button)
Temperature
Pulse strength
ºF
M
Degrees Fahrenheit Adult
Monitored temperature AC power
Battery charging (flashing)
Battery charged (steady)
Battery low
Battery fully discharged
5
2
Service overview
Purpose and scope
This service manual is a reference for periodic preventive maintenance and corrective
service procedures for the Vital Signs Monitor 300 Series.
Corrective service is supported to the level of field-replaceable units. These include some
circuit-board assemblies and some subassemblies, case parts, and other parts. (See
“Replacement parts” on page 85 for a complete list of user-replaceable service parts.)
Note
Repair and replacement of the main board is not supported. All service work on
the main board must be performed by certified and qualified service personnel at
an authorized Welch Allyn service center.
Caution No component-level repair of circuit boards and subassemblies is
supported. Use only the repair procedures described in this manual.
WARNING When performing a service procedure, follow the instructions
exactly as presented in this manual. Failure to do so could damage the monitor,
invalidate the product warranty, and lead to serious personal injury.
This guide provides troubleshooting information, assembly procedures, and instructions
for functional testing and performance verification. It is intended for use only by
technically qualified service personnel.
This guide applies only to the Vital Signs Model 300 Series. For servicing the previous
(52000-series) version of the Vital Signs Monitor, refer to Welch Allyn service manual
95P445E, which is available on the TechView CD (900298-1).
Technical support services
Welch Allyn offers the following technical support services:
Telephone support
Loaner equipment
Service agreements
Service training
Replacement service parts
Factory Service
For information on any of these services, contact Welch Allyn at the customer-service
numbers listed on page ii.
6 Service overview Welch Allyn VSM 300 Series
Returning products
To return a product for service, contact Welch Allyn Technical Support and request a
Return Material Authorization (RMA) number.
Note
Welch Allyn does not accept returned products without an RMA.
When requesting an RMA, please have the following information available:
• Product name, model number, and serial number
• A complete return shipping address, including a contact name and phone
number; include any special shipping instructions
• A purchase-order number or credit-card number if the product is not covered by
warranty
• A full description of the problem or service request
To ship the monitor, please observe these packing guidelines:
• Remove from the package all hoses, connectors, cables, sensors, power cords,
and other ancillary products and equipment, except those items that might be
associated with the problem.
• Use the original shipping carton and packing materials, or as close an
approximation as possible.
• Include a packing list.
• Write the Welch Allyn RMA number with the Welch Allyn address on the outside
of the shipping carton.
United States federal regulations require that any unit received by Factory Service must
be free from blood-borne pathogens before processing. All incoming products are cleaned
as well as possible, but products that cannot be effectively cleaned cannot be accepted
for repair. Please thoroughly clean all organic residues from the product before shipment.
This will ensure safe receipt, processing and repair, and will help expedite the return of
your monitor.
Product configurations
Model numbers for the configurations are as follows:
Model Features Model Features
53000 Standard (NIBP, Pulse Rate, and MAP) 530T0 Standard + Temperature
5300P Standard + Printer 530TP Standard + Temperature + Printer
®
53N00 Standard + Nellcor
53NT0 Standard + Nellcor SpO
53N0P Standard + Nellcor SpO
53NTP Standard + Nellcor SpO
SpO2 53S00 Standard + Masimo® SpO2
+ Temperature 53ST0 Standard + Masimo SpO2 + Temperature
2
+ Printer 53S0P Standard + Masimo SpO2 + Printer
2
+ Temperature + Printer 53STP Standard + Masimo SpO2 + Temperature + Printer
2
Service manual Service overview 7
Recommended service intervals
Interval or Condition Action Recommended Procedure Page
Every 6 - 24 months
(per hospital protocols)
Battery does not hold a charge Check battery capacity
Monitor has been dropped or
otherwise damaged
Monitor malfunctioning Complete functional test Functional verification 9
Monitor does not pass
Functional Verification
Complete functional test Functional verification 9
Functional verification
Replace battery
Complete functional test Functional verification 9
Troubleshooting and repair followed by
functional test; if necessary, return to
authorized service center
Disassembly procedure
Troubleshooting and repair
Disassembly procedure
Functional verification
9
53
33
53
9
Service options
Warranty service
All repairs on products under warranty must be performed or approved by Welch Allyn.
Refer all warranty service to Welch Allyn Factory Service or another authorized Welch
Allyn Service Center. Obtain an RMA number for all returns to Welch Allyn Factory
Service – see “Returning products” on page 6.
Caution Unauthorized repairs will void the product warranty.
Non-warranty service
Welch Allyn Factory Service and authorized Service Centers support non-warranty repairs.
Contact any Welch Allyn regional service center for pricing and service options.
Welch Allyn offers modular repair parts for sale to support non-warranty service. This
service must be performed only by qualified end-user biomedical/clinical engineers using
this service manual.
The Welch Allyn Monitor Service Utility supports certain service functions. For
information, see “Welch Allyn monitor service utility” on page 36.
Related documents
Title Reorder number
Vital Signs Monitor 300 Series Directions for Use (Masimo, multilanguage) 810-2250-XX
Vital Signs Monitor 300 Series Directions for Use (Nellcor, multilanguage) 810-2252-XX
Welch Allyn Parts and Accessories Guide 810-0409-XX
8 Service overview Welch Allyn VSM 300 Series
Service menu
To see the service menu, first power the monitor off. Press and hold for 3 seconds.
While is depressed, press until the monitor displays the message Service Mode.
The monitor runs a self-test and then displays the main software version number (M:
1.0 0.0 0). Press repeatedly to cycle to the menu selection of interest.
SYS
DIA (mmHg)
/min
SpO2 %
3 seconds
SERVICE MODE
Power-up Self-test
RESET TO DEFAULT
YES
NO
BP CYCLES:XXXXXX
RUN TIME:XXXXX
Main SW version
M: X.XX.XX
NIBP SW version
N:XX.XX.XX
POWER OFF
BATTERY:X.XX V
NIBP TEST
Exit Service Mode
SpO
SW version
2
S:X.X.X.X
Temperature SW version
T: X. X
9
3
Functional verification
Functional verification overview
This section describes the procedure for a complete functional test to support
recommended preventive-maintenance schedules.
The verification includes tests for a monitor configured with the printer, temperature, and
SpO
options. Perform only the tests applicable to the actual configuration.
2
A checklist of the functional tests is provided on “Checklist and test results report form”
on page 30. It is recommended that you print a copy of the checklist each time you
perform the functional verification procedure, so that you can record and save the test
results. If the monitor ever requires service, the records of test results can often facilitate
troubleshooting.
Functional verification does not require opening the monitor case.
Equipment required
This equipment is required for functional verification of a fully configured monitor.
Commercially available general-purpose/medical test equipment
Item Manufacturer part number/specification
Power supply Variable, 0-8 VDC, 0.75 amperes (minimum), with voltage and current
indicators (for 1mA current measurement)
Digital pressure meter Netech Digimano 1000 or equivalent
AC withstand voltage (hi-pot) tester Associated Research 3605 or equivalent
functional tester (Nellcor, for testing
SpO
2
the monitor only)
SpO
functional tester (Masimo, for testing
2
the monitor only)
SpO2 extension cable (required for SRCMAX)
SpO2 simulator (for testing the monitor and
the SpO
sensor)
2
Syringe, 60 mL, Slip tip, Luer BD (Becton, Dickinson) 309654 or equivalent
Hi-pot cable connectors See “Hi-pot test connections” on page 29.
Timer (to display elapsed time, in seconds)
Nellcor SRC-MAX
Masimo Tester REF 1593
Nellcor DEC-8
Fluke (Biotek) Index2 XL/XLFE or equivalent
10 Functional verification Welch Allyn VSM 300 Series
Welch Allyn accessories and test equipment
Temperature test key
(for testing the monitor only)
06138-000
9600 Temperature calibration tester
(for testing the monitor and the temperature probe)
Neonatal cuff hose, 96-inch 008-0265-XX
Neonatal #1 cuff, disposable, box of 10 008-0620-XX
Cuff simulator 020-0702-XX
DC power adapter 5200-101A
Battery substitution connector
(Use the female end from the cable set)
Welch Allyn Monitor Service Utility
(required for NIBP repair or replacement;
not required for functional testing)
Service Serial Cable (for use with the Welch Allyn
Monitor Service Utility 810-1784-XX)
Tycos air release valve and small bulb WA 5088-01
NIBP tubing connector, threaded 600-0021-XX
tubing, 1’ 600-0179-XX
Tee, plastic 600-0043-XX
01800-210, 110 V
01800-500, 220 V
01800-810, 220 V UK
01800-910, 220 V Australia
660-0237-00
810-1784-XX
008-0842-XX
Service manual Functional verification 11
Fah
Functional verification procedure
Reference illustration
renheit
Systolic
window
Diastolic
window
Adult
Pediatric
Neonatal
Message
window
SYS
DIA
SpO2 %
/min
Celsius
Print patient data
Change settings
Monitored
temperature
Increase/Decrease
Forward/Back
Battery charged
Battery charging
Battery low
System/power
Ct
Note
Setup
• If the monitor is configured with the temperature option, connect the temperature
• If you are using the optional Welch Allyn Model 9600 Calibration Tester (01800-200),
• If the monitor is configured with the SpO
Battery charge and beeper
1. With the monitor turned off, disconnect the power adapter from the monitor.
2. Verify that the charge LED is off.
3. Connect the power adapter. The monitor emits a single beep tone.
Other than the optional NIBP overpressure test (page 18), the tests described
here must be performed as part of a complete functional verification procedure.
probe and insert it into the probe well.
plug it in and set it to 96.4 °F (35.8 °C).
Power
On/Off
Review
patient
data
Set
NIBP
interval
Start/
stop
NIBP
Set
alarm
limits
option, connect the SpO2 sensor.
2
Silence
alarms
4. Verify that the charge LED is on.
Note
Depending on the charge level of the battery, the charge LED may be either
flashing or steady.
flashing indicates that the monitor is running on AC, the battery is charging,
and the battery is charged to less than 90% capacity.
steady indicates that the monitor is running on AC, the battery may or may
not be charging, and the battery is charged to at least 90% capacity.
12 Functional verification Welch Allyn VSM 300 Series
Battery substitution cable setup
1. Disconnect the power adapter.
2. Remove the battery cover and remove and disconnect the battery.
3. Separate the connector pair (660-0237-00). Use the end that is identical to the
connector on the battery as a battery substitution test cable.
4. Connect the open-ended red (+) and black (-) wires of this cable to the variable DC
power supply.
5. Set the power supply to 6.0 V ± 50 mV.
6. Connect the test power cable to the battery connector on the monitor.
Monitor-off current
With the monitor powered down, verify that the current draw from the power supply is
less than 1 mA.
Power-on self-test
1. Power the monitor on.
Note
If the monitor displays error E38, power the monitor off and then power it on
again.
2. Verify that the start-up tone (double beep) is audible.
3. Verify that all front-panel lights (background indicators, LCD pixels, and LED segments
and periods) come on in the proper order: left, center, and right.
Initialization/idle mode current
Note
1. If the temperature option is present:
If your monitor is configured without the temperature option and without the
SpO
option, skip these steps and proceed to “Baseline current draw” on
2
page 13.
a. Verify that the temperature probe is in the probe well.
b. Set the temperature mode to MONITOR.
c. Remove the temperature probe from the probe well.
d. Verify that the temperature reading appears within 4 seconds.
e. Do not return the probe to the probe well.
2. If the SpO
a. Verify that the SpO
option is present:
2
sensor cable is connected to the monitor.
2
b. Verify that the current draw from the bench power supply is less than 800 mA.
3. Disconnect the SpO
sensor (if equipped).
2
4. Insert the temperature probe (if the monitor is so equipped) into the probe well.
Service manual Functional verification 13
Baseline current draw
1. With the monitor powered on, wait for the monitor LEDs to blank. In this state, the
SpO2 % reads - -, the time of day is displayed in the message window, and the rest of
the displays are blank.
2. Note and record the exact current from the power supply. (This value will be used in
the NIBP and printer tests.)
Battery voltage
1. Power the monitor off.
2. Simultaneously press and hold and to bring up the monitor in SERVICE MODE.
(When the monitor completes the power-on self-test in service mode, the main
software version number appears in the message display.)
3. Press repeatedly until BATTERY VOLTAGE appears in the message display.
4. Verify that the displayed battery voltage is within 0.1 volt of the DC power supply
input.
5. Exit Service Mode by turning off the monitor and then turning it on again.
14 Functional verification Welch Allyn VSM 300 Series
NIBP
Ct
Note
Characterization test
1. Attach a neonate hose (part 008-0265-01) to the NIBP fitting on the monitor.
2. Prepare the 60-mL syringe as follows, with reference to the illustration below:
The tests described in this section are to be performed only as part of a complete
functional verification procedure.
a. Move the syringe plunger to the 35 mL line.
b. Drill a small hole (for example, 9/64 inch) through the syringe and the plunger
shaft, at a location between the plunger and the top of the syringe.
c. Insert a rod or bolt (for example, a 6-32 screw) through the hole so that the
plunger cannot move, creating a constant volume in the syringe of 35 mL ± 2 mL.
Secure the rod or bolt so that it cannot fall out of the hole.
-- 60
--
-- 50
--
-- 40
--
-- 30
--
-- 20
--
-- 10
--
ml
3. Insert the tip of the syringe into the open end of the neonate hose. Verify that the fit
is tight and secure.
4. Set the monitor patient type to Adult, as follows:
a. Press once.
b. If the monitor is not already in Adult mode, press once or twice until Adult
appears in the message display.
c. Press .
5. Press .
6. Verify that the error code C03 appears in the message display within a few seconds.
WARNING If the error code C03 does not appear, characterize NIBP according
to the instructions presented on page 35, and then repeat the NIBP
characterization test.
WARNING Do not use the monitor if it does not pass the NIBP characterization
test. If the NIBP module is not properly characterized, the monitor could
overinflate a neonatal cuff, which could create a hazard for neonatal patients.
WARNING If you cannot characterize the NIBP module, remove the monitor
from service immediately and return it to Welch Allyn for service. (See “Returning
products” on page 6.)
Service manual Functional verification 15
Leak test
This tests the NIBP system for abnormal leakage.
If the NIBP system is leaking, check for leaks in the external plumbing before opening the
case to look for internal leaks.
If you determine that any NIBP module component is causing abnormal leakage, you
must replace the NIBP module before returning the monitor to clinical use.
Caution Do not attempt component-level repair of the NIBP module. Any
change to the NIBP module requires that the monitor be returned to the factory
for NIBP module calibration.
1. Put the monitor in Service mode:
a. Power the monitor off.
b. Power the monitor on while pressing .
WARNING Do not connect the monitor to a patient while the monitor is in
Service mode. Overpressure detection is disabled while the monitor is in NIBP
test mode.
2. Attach a #1 neonatal cuff and hose to the monitor
Wrap the cuff securely around a solid cylindrical object of circumference between 1.6
and 1.9 inches (4.1 and 4.8 cm).
3. Press repeatedly until NIBP TEST appears in the message window and 0 is
displayed in the SYS and DIA windows.
Note
4. Press once to select 80 mmHg (10.7 kPa). The cuff inflates to approximately 115
Note
When you first enter the NIBP test mode, give the monitor about a minute to
initialize NIBP before you change the target test pressure.
When switching from one target pressure to the next, give the monitor time to
fully inflate and stop before you select the next target pressure.
In the NIBP test mode, press repeatedly to select the target NIBP test
pressure. The target pressure is displayed on the DIA LEDs. The measured
instantaneous pressure determined by the monitor is displayed on the SYS LEDs.
mmHg (15.3 kPa).
In the NIBP test mode, and especially at small test volumes, the pressure
achieved can vary significantly (30-40 mmHg or 4-5.3 kPa) from the target
pressure.
5. Wait 15 seconds, and note the current pressure.
6. Wait another 10 seconds and verify that the pressure has not dropped more than
8 mmHg (1.1 kPa) below the pressure noted in step 5.
If the pressure drop is greater than 8 mmHg (1.1 kPa), check the cuff, the hose, and all
external connections for leaks, and then repeat from step 3.
16 Functional verification Welch Allyn VSM 300 Series
7. Press several times to select 0 mmHg (0 kPa). The valve opens to release
pressure.
8. Disconnect the neonate cuff.
Pressure calibration verification
This tests pressure readings on the monitor against a calibrated external pressure meter.
1. Put the monitor in Service mode:
a. Power the monitor off.
b. Power the monitor on while pressing .
WARNING Do not connect the monitor to a patient while the monitor is in
Service mode. Overpressure detection is disabled while the monitor is in NIBP
test mode.
2. Connect the monitor to an adult cuff or a cuff simulator, a pressure meter or a
manometer, and a pump bulb, as shown.
3. Press repeatedly until NIBP TEST appears in the message window and 0 is
displayed in the SYS and DIA windows.
Service manual Functional verification 17
4. Press once to select 80 mmHg (10.7 kPa). The cuff quickly inflates to
approximately 80 mmHg (10.7 kPa), and then settles at a slightly lower pressure level.
Wait a few seconds for the pressure to stabilize.
5. Verify that the value displayed in SYS is within 3 mmHg (0.4 kPa) of the value
displayed on the digital pressure meter.
6. Press to select 150 mmHg (20 kPa) target pressure. The cuff quickly inflates to
approximately 150 mmHg (20 kPa), and then settles at a slightly lower pressure level.
Wait a few seconds for the pressure to stabilize.
7. Verify that the value displayed in SYS is within 3 mmHg (0.4 kPa) of the value on the
digital pressure meter.
8. Press to select 300 mmHg (40 kPa). The cuff quickly inflates to approximately 300
mmHg (40 kPa), and then settles at a slightly lower pressure level. Wait a few
seconds for the pressure to stabilize.
9. Verify that the value displayed in SYS is within 6 mmHg (0.8 kPa) of the value on the
digital pressure meter.
Valve and pump current, inflation, and deflation tests
Note
To test pump current
1. Put the monitor in Service mode:
2. Press repeatedly until NIBP TEST appears in the message window and 0 is
3. Press to select 0 mmHg (0 kPa) target pressure.
4. While watching the current meter, press to select 80 mmHg (10.7 kPa) target
5. Note the highest current reading during inflation.
6. While the pump is running, verify that the reading on the current meter is not more
Replace the internal battery with an external power supply. (See “Battery
substitution cable setup” on page 12.)
a. Power the monitor off.
b. Power the monitor on while pressing .
WARNING Do not connect the monitor to a patient while the monitor is in
Service mode. Overpressure detection is disabled while the monitor is in NIBP
test mode.
displayed in the SYS and DIA windows.
pressure.
than 750 mA above the current level noted in step 2 of the verification test (“Baseline
current draw” on page 13).
7. Press three times to select 0 mmHg (0 kPa) target pressure.
To test inflation
1. Press repeatedly until NIBP TEST appears in the message window and 0 is
displayed in the SYS and DIA windows.
18 Functional verification Welch Allyn VSM 300 Series
2. Press once to select 80 mmHg (10.7 kPa).
3. Wait for the pump to start and stop.
4. Press once to select 150 mmHg (20 kPa).
5. Wait for the pump to start and stop.
6. Bleed the pressure to 0 by opening the relief valve on the bulb.
7. Close the relief valve on the bulb.
8. Have a timer ready.
9. Press once to select 300 mmHg (40 kPa), and immediately observe the
manometer.
10. As soon as the manometer reads 5 mmHg (0.67 kPa), start the timer.
11. When the manometer reaches 250 mmHg (33.3 kPa), stop the timer.
12. Verify that the elapsed time (step 11 minus step 10) is less than 8 seconds.
To test deflation
1. If the pressure has dropped more than 10 mmHg, use the pump bulb to raise it to 300
mmHg ± 5 mmHg.
2. While the pressure is still at approximately 300 mmHg (as shown by the manometer
and the SYS window), press once to select 0 mmHg, and immediately start the
timer.
3. After 10 seconds, verify that the manometer reads less than 15 mmHg.
If you are doing the NIBP overpressure test, skip to “Overpressure tests (optional)”
on page 18.
4. Disconnect the hose from the monitor.
Overpressure tests (optional)
Note
These tests demonstrate that:
Redundant circuitry in the VSM 300 series monitor guarantees that the bloodpressure cuff cannot overinflate.
The allowable cuff pressure and the overpressure cutoff are controlled by
software. A software failure (a defective PROM) would generate a checksum
error, disabling monitor operation and setting it in a safe mode.
• the monitor cannot exceed the maximum allowable cuff pressure for adults (280
mmHg), pediatrics (200 mmHg), and neonates (141 mmHg)
• the overpressure cutoff feature shuts down the pump and dumps pressure before
the pressure reaches 330 mmHg (44 kPa)
To verify maximum allowable cuff pressure in the adult or pediatric mode
1. Assemble one of the test setups illustrated on page 16, using an adult cuff or cuff
simulator.
Service manual Functional verification 19
2. Turn on the monitor.
3. Set the monitor to ADULT mode.
a. Press twice.
b. Press repeatedly until ADULT appears.
4. Set the inflation target pressure to 270 mmHg (36 kPa).
a. Press repeatedly until TARGET PRESSURE appears in the display window.
b. Press repeatedly as needed to set the target pressure (displayed in the SYS
window) to 270 mmHg (36 kPa).
5. Press to start the pump.
The pressure reaches approximately 270 mmHg (36 kPa), the pump shuts off, and the
pressure begins stepping down.
6. Carefully squeeze the pump bulb to raise the pressure to 280 mmHg (37.3 kPa).
• The dump valve opens and quickly drops the pressure to approximately 0.
• The monitor displays C10 to indicate that an overpressure event has occurred.
7. Set the monitor to PEDIATRIC mode.
8. Set the inflation target pressure to 170 mmHg (22.7 kPa).
9. Raise the pressure to 200 mmHg (26.7 kPa).
a. Press and wait for the pressure to reach 170 mmHg (22.7 kPa). The pump
shuts off and the pressure reading starts stepping down.
b. Carefully squeeze the pump bulb to raise the pressure to 200 mmHg (26.7 kPa).
• The dump valve opens and quickly drops the pressure to approximately 0.
• The monitor displays C10 to indicate that an overpressure event has occurred.
10. Replace the adult cuff with a #1 neonate cuff, and wrap the neonate cuff securely
around a solid cylindrical object with circumference between 1.6 and 1.9 inches (4.1
and 4.8 cm).
11. Set the monitor to NEONATE mode.
12. Set the inflation target pressure to 132 mmHg (17.6 kPa).
13. Raise the pressure to 141 mmHg.
a. Press and wait for the pressure to reach 132 mmHg (17.6 kPa). The pump
shuts off and the pressure reading starts stepping down.
b. Carefully squeeze the pump bulb to raise the pressure to 141 mmHg (18.8 kPa).
• The dump valve opens and quickly drops the pressure to approximately 0.
• The monitor displays C10 to indicate that an overpressure event has occurred.
To verify overpressure cutoff for NIBP versions 4.20.00 and later
This test demonstrates that the overpressure cutoff feature prevents pressure from rising
fast enough to exceed the cutoff pressure (295 to 330 mmHg, or 39.3 to 44.0 kPa) before
the pump stops and the dump valve and the bleed valve open.
20 Functional verification Welch Allyn VSM 300 Series
When the overpressure cutoff triggers, the pump stops, the dump and bleed valves open,
and the monitor displays E40. Any subsequent button press shuts off the monitor.
Note
Due to NIBP implementation differences, this test does not verify overpressure
cutoff in earlier NIBP versions.
In those versions, due to a longer software delay in activating the cutoff function,
the normal overpressure cuff pressure is exceeded before the overpressure
cutoff safety triggers. If the normal overpressure-detection algorithm were to fail,
the overpressure cutoff safety function would trigger immediately.
1. Restart the monitor.
2. Set the monitor to ADULT mode.
3. Set the inflation target pressure to 270 mmHg (36.0 kPa).
4. Increase the inflation rate, causing the overpressure cutoff to stop the pump and
open the bleed and dump valves.
a. Start the pump.
b. When the pressure (SYS window) reaches approximately 230 mmHg (32.4 kPa),
very rapidly squeeze the pump bulb while observing the digital pressure meter.
Assuming that you squeeze the bulb rapidly enough to reach the trigger threshold
and activate the overpressure cutoff:
• The pressure does not exceed 280 mmHg.
• The dump valve and bleed valve open, dropping the pressure to
approximately 0.
• E40 appears in the Sys window.
• Pressing any button causes the monitor to shut down.
5. Disconnect the test setup from the monitor.
If you executed this test as part of the functional verification procedure, proceed to...
• “Printer” on page 21.
• If the monitor has no printer, “SpO
” on page 23.
2
• If the monitor has no SpO2 option, “Temperature” on page 25.
• If the monitor has no temperature option, “Nurse call” on page 26.
Service manual Functional verification 21
Printer
Ct
Note
1. Put the monitor into Service Mode.
2. Verify that the printer has paper.
3. Press . Verify that a settings report prints, and that it contains no printed anomalies
This test is to be performed only as part of a complete functional verification
procedure.
and no missing or faded sections.
Note
With a new roll of paper, the first line might be faded. This does not indicate a
problem.
Note
The settings report (as shown in the example below) contains a calibration record,
user record, hardware status record, and software versions record.
• The calibration record includes manufacturing configuration data: monitor
serial number, set parameters, and language.
• The user record includes user-configurable settings: alarm limits, patient type,
parameter modes/units, auto interval, tone volume, and others.
• The hardware status record shows the hardware revision number, the battery
voltage level, the total number of NIBP monitoring cycles completed on the
monitor, and the total number of hours of operation of the monitor.
• The software versions record indicates the software version numbers of the
main board, SpO
and Temperature options (if present), and NIBP.
2
4. After 2 seconds of printing, verify that the current draw is no more than 2.5A above
the baseline current recorded in step 2 of the verification test “Baseline current
draw” on page 13.
5. Exit the Service Mode.
22 Functional verification Welch Allyn VSM 300 Series
|(R)|
| Vital Signs Monitor |
| -- Unit Settings -- |
| 13:04:21 15-Oct-2003 |
||
||
| Calibration Record |
| ------------------ |
| Serial #: XXXXX.XXXX |
| Serial # signature: NULL |
| Calibration time/date |
| 12:00:00 01-Jan-2000 |
| Calibration signature NULL |
| Language: ( 0) English |
| Configuration |
| SpO2 = 1 Temp = 1 |
| Printer = 1 |
| Ambient bias (K) X.XX |
| SpO2 valid ver.: X.X.X.X |
| Temp valid ver.: X.X |
| NIBP valid ver.: XX.XX.XX XXXXX |
||
| User Record |
| ----------- |
| Alarm Settings |
| High Sys (0.01 mmHg): 220 |
| Low Sys (0.01 mmHg): 75 |
| High Dia (0.01 mmHg): 110 |
| Low Dia (0.01 mmHg): 35 |
| High MAP (0.01 mmHg): 120 |
| Low MAP (0.01 mmHg): 50 |
| High PR (bpm): 120 |
| Low PR (bpm): 50 |
| High O2 (%): 0 |
| Low O2 (%): 85 |
| Patient type (A, P, N): A |
| BP Units (mmHg, kPa): mmHg |
| Target press (0.01 mmHg) 160 |
| Auto interval: 15 |
| MAP (On, Off): Off |
| Temperature units (C, F): F |
| Temperature mode (P, M): P |
| Pulse tone volume : 3 |
| Clinical pause (msec) 0 |
| Print button mode (B, S) B |
||
| H/W Status |
| ---------- |
| Hardware revision: X |
| Battery voltage (mv) XXXX |
||
| Total Cycles Total Runtime |
| ------------ ------------- |
| XXXXXX XXXX (hrs) |
||
||
| S/W Versions |
| ------------ |
| Unit: X.XX.XX XXXXX |
| SpO2: X.X.X.X |
| Temp: X.X |
| NIBP: XX.XX.XX XXXXX |
| -------------------------------- |
| -------------------------------- |
Welch Allyn
Service manual Functional verification 23
SpO
2
Ct
Note
The tests described in this section are to be performed only as part of a complete
functional verification procedure.
Perform one of the following three SpO2 tests.
Testing the monitor only (Nellcor SpO2)
Use this procedure to test only the monitor SpO2 function.
1. Power the monitor off.
2. Connect the Nellcor SRC-MAX SpO
functional tester to the SpO2 input connector
2
through a Nellcor DEC-8 extension cable.
3. Power the monitor on.
Note
In the following tests, if the SRC-MAX defaults are outside the monitor alarm
limits, readjust the limits or silence the alarms.
4. Verify the following on the SRC-MAX:
• All of the LEDs flash: left panel, center panel, right panel.
• SRC-MAX initializes to a default condition where the four test parameter LEDs are
lit closest to their selector buttons
• The default pulse rate is 60 bpm and the default SpO
is 75%
2
5. Give the monitor up to 30 seconds to stabilize, and verify a displayed pulse rate of
60 ± 3 bpm and a displayed SpO
of 75 ± 3%.
2
6. Set the SRC-MAX pulse rate to 200 bpm.
7. Give the monitor up to 30 seconds to stabilize, and verify a displayed pulse rate of
200±3bpm.
8. Switch the SRC-MAX SpO
9. Give the monitor up to 30 seconds to stabilize, and verify a displayed SpO
saturation percentage to 90.
2
saturation
2
level of 90 ± 3%.
10. Disconnect the SRC-MAX.
Testing the monitor only (Masimo SpO2)
Use this procedure to test only the monitor SpO2 function.
1. Power the monitor off.
2. Connect the Masimo Tester REF 1593.
3. Power the monitor on.
4. Give the monitor up to 30 seconds to stabilize, and then verify a displayed pulse rate
(from SpO2) of 61 bpm ± 1 bpm and a displayed saturation of 81% ± 3%.
24 Functional verification Welch Allyn VSM 300 Series
Testing the sensor with the monitor
Use this procedure to test the monitor SpO2 function while verifying a sensor.
1. Set the BioTek Index2 SpO
SpO
manufacturer type Nellcor (MP-506A or Nell-3A)
2
simulator as follows:
2
Masimo (MS-11)
% SpO
2
94
Rate 60 (Motion Artifact not selected)
2. Connect an SpO
sensor to the simulator optical finger and to the monitor.
2
3. Wait for the monitor display to stabilize.
4. Verify an SpO
saturation level of 94 ± 4.
2
5. Verify that the monitor displays a pulse rate of 60 ± 4.
Service manual Functional verification 25
Temperature
Ct
Note
Perform one of the following temperature tests.
Testing the monitor only
Use this procedure to test only the temperature function.
1. With monitor power on and with the temperature probe in the well, disconnect the
2. Connect the Welch Allyn Sure Temp Plus temperature test key (06138-000) to the
3. Remove the probe from the well.
4. Verify that the displayed temperature is 97.3 ± 0.2 °F (36.3 ± 0.1 °C).
The tests described in this section are to be performed only as part of a complete
functional verification procedure.
probe cable from the temperature input connector on the rear of the unit.
temperature input connector.
Testing the probe with the monitor
Use this procedure to test the temperature function while verifying the temperature
probe.
1. If the Welch Allyn 9600 Calibration Tester (01800-200) is not already warmed up,
warm it up as follows:
a. Set the 9600 Calibration Tester temperature switch to 96.4 °F (35.8 °C).
b. Plug the power adapter into the 9600 Calibration Tester; wait (up to 15 minutes)
until the tester ‘ready’ indicator light is on continuously.
2. Set the monitor temperature mode to Monitored.
3. Insert the temperature probe (without probe cover) into the small thermometer hole
on the dry-heat well of the 9600 tester.
4. Wait two minutes and verify that the reading displayed on the monitor is 96.4 ± 4 °F
(35.8 ± 2 °C).
5. Switch the 9600 Calibration Tester to 106.0 °F (41.1 °C) and wait about five minutes
for the ‘ready’ indicator to light.
6. Verify that the reading displayed on the monitor is 106.0 ± 0.4 °F (41.1 ± 0.2 °C).
7. Remove the probe from the tester and replace it in the probe well.
8. Disconnect the 9600 Calibration Tester.
26 Functional verification Welch Allyn VSM 300 Series
Nurse call
Ct
Note
Relay verification
With reference to the drawing and table below, use an ohmmeter to check the contact
resistance at the output pins of the Nurse Call connector, while the monitor is in the alarm
state and while the monitor is out of the alarm state.
When the Nurse Call verification is done, disconnect the Nurse Call cable and turn off the
monitor.
The tests described in this section are to be performed only as part of a complete
functional verification procedure.
1 (Black)
Normally Open
2 (Red) Arm
Pins Resistance
1-2 > 1 MΩ < 1 Ω
2-3 < 1 Ω > 1 MΩ
4 (not connected)
3 (Green)
Normally Closed
(Alarm OFF)
Putting the monitor into the alarm state
To create an alarm condition for testing the Nurse Call relay, follow these steps.
1. Press repeatedly until INTERVAL ST appears in the message display.
2. Wait for the pump to charge twice (about 10 seconds), and verify that error code C04
appears in the SYS display.
3. Verify that the Nurse Call circuit is shorted. (Refer to the table shown above.)
30V , 1A Max.
Resistance
(Alarm ON)
4. Press .
5. Verify that the Nurse Call circuit is open. (Refer to the table shown above.)
6. To exit the alarm state, press repeatedly until INTERVAL 15 appears in the
message display, and then press .
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