Welch Allyn Atlas User manual
Patient Monitor
Operator Manual
Welch Allyn Medical Division
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Drawings and/or illustrations and/or part numbers contained in this document
are for reference purposes only. For current revisions call the Welch Allyn
Customer Service phone number listed in Section 1 page 2.
SERVICE MANUAL 6200-43E REV. A
WELCH ALLYN ATLAS PATIENT MONITOR i
Contents PAGE
Section 1: General Information
1.1 About the Atlas ............................................................................................................ 1
1.2 T echnical Help Information, W orldwide T ech Support Phone Number........................... 2
1.3 Product Model Number Structure ................................................................................. 3
1.4 Main Menu Architecture ................................................................................................ 6
1.5 Atlas System Block Diagram ........................................................................................ 7
Section 2: Service (See User Manual 6200-42E for Atlas Specifications)
2.1 Incoming Inspection,Checklist ...................................................................................... 1
2.2 Repair Tests ............................................................................................................. 2-4
Table 2-1 :Tools Required for Service, Calibration and Software Loading ................... 5
Table 2-2:Software/Firmware Revision Levels ............................................................ 6
2.3 Calibration Procedures
BP Calibration - Section 2.3.1 ........................................................................... 7
ETCO2 Calibration (623Models only) - Section 2.3.2.........................................7&8
CO2 Reset (623Models only) - Section 2.3.3 ........................................................ 9
Printer Calibration - Section 2.3.4 ....................................................................... 10
Battery V oltage Calibration (Models 622xx and 623xx only)- Section 2.3.5 .... 10&11
T emperature Measurement Subsystem Calibration- Section 2.3.6 ...................... 12
Set Battery Charge V oltage-Section 2.3.7 .......................................................... 13
2.4 Software
Software Chart#2.4 .1.......................................................................................... 14
Downloading Operating System 2.4.................................................................... 15
2.5 Downloading NVRAM T ext files ............................................................................ 15&16
2.6 Downloading Software and NVRAM T ext files............................................................. 16
2.7 Product Numbering Structure .................................................................................... 17
Section 3: Troubleshooting (Also see Atlas Operator’s manual Appendix E)
3.1 Functional T ests/ Initial Diagnostic Steps ...................................................................... 1
3.2 T echnical T roubleshooting T ables: Complaint/Cause/Corrective Action ....................... 12
3.3 T op Level T roubleshooting Index .................................................................................. 15
3.4 Diagnostic T ests and Test Setups ............................................................................... 17
Section 4: Disassembly and Repair
About Section 4 .................................................................................................................... 1
4.1 Model 200 Dissassembly .............................................................................................. 2
4.2 Model 200 Re-assembly.............................................................................................. 13
4.3 Other Models notes ..................................................................................................... 15
ii WELCH ALL YN A TLAS P ATIENT MONITOR
SERVICE MANUAL 6200-43E REV. A
Appendix Section:
A...............................................................................................................theory of operations
B...................................................................................................................... repair parts list
C....................................................................................interconnect diagram 620396 Rev A
D...................................................................... electrical schematics and circuit board layouts
E...........................Safety T ests: Required Equipment and Procedures and Test Results Form
SERVICE MANUAL 6200-43E REV. A
WELCH ALLYN ATLAS PATIENT MONITOR iii
Section 1 - General Information
The Atlas combines in one unit all the necessary measurements for patients under anesthesia, for surgical
recovery , or bed side monitoring. See Section 1.3 for a
complete listing of product models and options.
According to the standards of care for Nurse Anesthetists and Anesthesiologists, all patients receiving conscious sedation are to be continuously monitored
throughout the procedure and recovery phase by ECG,
SpO2, and NIBP. CO2 monitoring is a requirement during gas anesthesia (when patient is ventilated).
The Atlas combines a CRT to display ECG and CO
waveforms and LEDs for the other numeric values to
maximize visibility and viewing angle. Although not
designed to be a transport product, the monitor has an
integral handle and it is small and light enough at 13 lb
to be easily moved. A one hour battery enables the
monitor to be moved with the patient from the surgery
room to recovery room. It also maintains unit operation
for up to an hour when power is interrupted.
1.1 About the Atlas Monitor
2
IMPORT ANT: for a complete description on the function and use of the Atlas, as well as user safety warnings, cautions, and warranty information, read and
understand the Atlas Operator’s Manual part number
6200-42E (English). Other languages are available.
SERVICE MANUAL 6200-43E REV. A
WELCH ALLYN ATLAS PATIENT MONITOR 1
Section 1 - General Information
1.2
Help Information
Safety Warnings
All service and repairs must be performed by fully trained
and properly equipped personnel, using genuine
replacement parts and correct procedures. Failure to do
so will invalidate the product warranty.
Read and understand all safety warnings and
service notes printed in this Service Manual and the
Operator’s Manual part number 6200-42E. If in
doubt about any precaution or procedure, for
phone help, or to order additional copies of the
Atlas Operator’s Manual, contact:
Customer Service
Welch Allyn, Inc.
4341 State Street Road, PO Box 220
Skaneatles Falls, NY 13153-0220 U.S.A
Telephone 1-800-535-6663
When calling, refer to the model number on the
bottom of the Atlas. The Model Number is the first three
digits of the Serial number number found on the bottom
of the Atlas.
Treat all returned opened Nasal CO2 Sample Lines
and watertraps as Bio Hazard material and dispose
of them in an approved manner.
Troubleshooting assistance is contained in Section 3 of
this manual to help determine which board is
malfunctioning. This manual does not support repairing
the printed circuit boards.
Year 2000 Information: The Atlas is Y2K compliant and
will not encounter “Year 2000” problems.
2 WELCH ALL YN A TLAS P ATIENT MONITOR
SERVICE MANUAL 6200-43E REV . A
Section 1 - General Information
1.3 Product Model Number Structure
621S0 ECG, Nonin SpO2, NIBP
621SP ECG, Nonin SpO2, NIBP , Printer
622S0 ECG, Nonin SpO2, NIBP, T emp, Respiration, Battery , RS232
622SP ECG, Nonin SpO2 , NIBP, T emp, Respiration, Battery , RS232, Printer
622N0 ECG, Nellcor SpO2, NIBP , Temp, Respiration, Battery , RS232
622NP ECG, Nellcor SpO2, NIBP, T emp, Respiration, Battery , RS232, Printer
623SP ECG, Nonin SpO2, NIBP, ETCO2, T emp, Respiration, Battery , RS232, Printer
623NP ECG, Nellcor SpO2, NIBP, ETCO2, T emp, Respiration, Battery , RS232, Printer
SUFFIX:
Use letter designation for language localization as follows:
E = English, F= French, G= German, I= Italian, S= Spanish, P= Portuguese C = Chinese,
J= Japanese
Use number designation for line cord localization as follows:
1 = US, Canada, Japan V ersion
2 = European Version
4 = United Kingdom Version
6 = Australian V ersion
SERVICE MANUAL 6200-43E REV A WELCH ALLYN ATLAS PATIENT MONITOR 3
Section 1 - General Information
1.4 Main Menu Architecture
*
Also note that this is for the 623xx system.
• On a 622xP system, delete the CO2 Reset box, the Calibrate CO2 item, and the CO
units item.
• On a 621xP system, delete the CO2 Reset box, the Calibrate CO2 item, the CO
units item, Respiration speed item, the T emperature units item, and the Battery
test item.
• On systems without printers (621x0 and 622x0) delete the Printer test pattern item.
*
The Display A/D Channels also lets you press <SET> up and down to display additional
sets of information, but does not change the menu page that you are on, just writes
different information on the right side of the screen.
4 WELCH ALL YN A TLAS P A TIENT MONITOR SERVICE MANUAL 6200-43E REV A
2
2
Section 1 - General Information
Section 1.5 Atlas System Block Diagram
SERVICE MANUAL 6200-43E REV A WELCH ALLYN ATLAS PATIENT MONITOR 5
Section 2 - Service
o 2.1.1 Inspect shipping package and product
for damage. Make a record of possible
shipping damage.
2.1.2 List accessories in box.
o power cord
o SpO2 probe
o ECG leads
o ECG lead cable
o Cuff(s)
o Operator Manual
o nasal C02 Line
o ECG Electrode(s)
o temperature probe
o BP tubing
o paper
o loose parts, describe
2.1 Incoming Inspection
Service Intervals for
Calibration and Maintenance are listed in
Atlas Operator’s
Manual Appendix C.
o 2.1.3 Clean and disinfect by following the
instructions printed in the Operator
Manual.
o 2.1.4 Operate the Atlas to verify the customer
complaint before making any changes to
the unit. Call the customer if the complaint
is unclear .
NOTE: Perform REPAIR TESTS in
Section 2.2 to fully inspect the
Atlas monitor before and after
servicing. Refer to Section 3
for Troubleshooting help.
2.1.5 If the unit has caused or is suspected of
having caused an injury of any type:
DO NOT DISASSEMBLE OR REP AIR
THE UN IT IN ANY WA Y.
Contact Welch Allyn Customer Service
immediately .
SERVICE MANUAL 6200-43E REV . A WELCH ALLYN ATLAS MONITOR 1
Section 2 - Service
2.2 Repair Tests 2.2.1 Blood Pressure System Leakage T est:
BP Leak Test
Unit must not leak more than 5 mmHg in a 15
second interval while attached to a 100 cc
volume at test pressures of 50mmHg and
250mmHg.
Need:
100cc (+10/-0cc) test cavity
stopwatch
squeeze bulb
2.2.1.1 Connect Atlas to test 100cc volume and
Setra Gage as shown in Figure 2.3.1.1
2.2.1.2 Turn Atlas ON
2.2.1.3 Press Time and Date button to access
Options Menu.
2.2.1.4Press Lead Select button to select
Service Mode. Select V erify Manometer
2.2.1.5Pressurize the Atlas with squeeze bulb
to 50mmHg.
NOTE: Allow reading to stabilize for 15 seconds.
2.2.1.6Observe pressure for 15 additional
seconds. Unit should not leak more than
5mmHg during this time.
2.2.1.7Perform this process at 250mmHg
BP Dump Test
Manometer Accuracy Test
2.2.2 Dump T est:
Unit must be able to deflate a 500 cc volume
from greater than 260.0 mmHg to less than
15.0 mmHg in 10 seconds or less.
2.2.3 Manometer Accuracy T est
Internal temperature of the unit must be less
than 32.0 degrees Celsius before performing
test.
2.2.3.1 The primary transducer must be within +/-
0.75 mmHg at 0 +/-0.3 mmHg. The safety
transducer must be within +/-1 mmHg at
0+/-0.3 mmHg.
2.2.3.2 The primary transducer must be within +/-
1.5 mmHg at 50 +/-5.0 mmHg. The safety
transducer must be within +/-1.5 mmHg at
50 +/- 5.0 mmHg.
2.2.3.3 The primary transducer must be within +/-
1.5 mmHg at 150 +/-5.0 mmHg. The
safety transducer must be within +/-4.5
mmHg at 150 +/- 5.0 mmHg.
2.2.3.4 The primary transducer must be within +/-
2 WELCH ALL YN A TLAS MONITOR
SERVICE MANUAL 6200-43E REV. A
Section 2 - Service
2.2.4 Deflation T est:
With the unit connected to a large adult cuff
and a target inflation pressure of 200 mmHg*
have the unit perform a complete “normal”
BP cycle.
For steps two and three, the size of the step
must be between 3.0 mmHg and 1 1.0 mmHg.
Step 4 and all other steps above or equal to
40 mmHg, step size must be between 7.0
mmH gand 1 1.0 mmHg. All steps below 40
mmHg, except for the last step, will be
between 4.5 mmHg and 10 mmHg. The last
step will be between 0.01 mmHg and 10
mmHg.
2.2.5 Charge Voltage Test:
Check battery charging circuit:
Specification :No Load: 6.85VDC across
right pin (+) and left pin (-) of Main PCB
battery charge connector .
Deflation T est
* Go to service mode
screen and set initial
pressure to 200mmHg.
Charge Voltage Test
2.2.6 Hardware Fail Safe Tests
2.2.6.1 Over Pressure T est:
Atlas hardware must detect over
pressure on unit pneumatic system
between 296.0 mmHg and 329.0 mmHg.
2.2.6.2 Over 15 mmHg T est:
Atlas hardware must detect if the
pneumatic system has been pressurized
greater than 15 mmHg for more than 155
seconds but less than 180 seconds.
2.2.6.3 Under 15 mmHg Test:
Atlas hardware must detect if the
pneumatic system has been pressurized
less than 15 mmHg for more than 25.0
seconds but less than 35.0 seconds
before alowing new inflation cycle in “nonStat” Auto Mode.
2.2.7 RS232 T est:
The RS232 communication operation
will be confirmed with successful
serial transmit and receive.
Hardware Fail Safe Tests
RS232 Test
2.2.8 Printer Option T est:
Printer Option T est
The printer must be able to print out the test
pattern . Inspect print quality .
SERVICE MANUAL 6200-43E REV . A WELCH ALLYN ATLAS MONITOR 3
Section 2 - Service
ECG Test
NOTE:
Section 3 of this Service
Manual contains
troubleshooting steps for
the ECG subsystem.
These tests will help
determine if the main
board is faulty .
2.2.9 ECG T est:
Use a calibrated simulator to check
performance.
NOTE: There is no calibration for the ECG or
impedance Respiration subsystems.
If the performance does not match up to that
expected using a calibrated simulator then
there could be a problem with the cable, leads,
connectors, wiring or the main board itself. If
the main board is faulty then replace it.
SpO2 T est
NOTE:There is no
calibration for the SpO2 and
Pulse subsystem. If the
performance does not
match up to that expected
using a calibrated simulator,
or the Phantom finger set,
then the subsystem board
must be replaced.
2.2.10SpO2 T ests:
Need:
Appropriate Phantom finger set
SpO2 cuff and cable
Or:
Nellcor or Nonin (as fitted) simulator
(replaces cuff to drive subsystem)
Or:
Calibrated SpO2 simulator that has a cuff
fitting that simulates a perfused finger
Nonin: Settings for NoninPatient Simulator
8000S are 98% O2 / 80 BPM. SpO2 board
accuracy after 25 second stabilization period
must be within +/-2%O2 and +/- 2BPM.
Nellcor: Settings for Nellcor Patient Simulator
SRC-2 are 81% O2 and 112 BPM. SpO2 board
accuracy after 25 second stabilization period
must be within +/-2% O2 and +/- 2 BPM.
Temperature Test
4 WELCH ALL YN A TLAS MONITOR
2.2.1 1TEMP ACCURACY VERIFICA TION
Need:
Calibrated thermometer (DIGIT AL OR GLASS)
small insulated container with cover for warm water
2.2.1 1.1Fill container wtih approximately 96 degree
F water
2.2.1 1.2Attach temperature probe neaqr the sensing
part of the thermometer and insert into the
warm water .
2.2.1 1.3Accuracy must be within +/- 0.2 degrees F.
SERVICE MANUAL 6200-43E REV. A
Section 2 - Service
T able 2-2:Software/Firmware revision levels
LEDOMmetsySgnitarepOredaoltooBroclleNninoNnoyrP
OS12699/8/9,0004.10.AA99/02/6,0000.10.AA7V
PS12699/8/9,0004.10.AA99/02/6,0000.10.AA7V
OS22699/8/9,0004.10.AA99/02/6,0000.10.AA7V
PS22699/8/9,0004.10.AA99/02/6,0000.10.AA7V
ON22699/8/9,0004.10.AA99/02/6,0000.10.AA79/71/210.0.2.1V
PN22699/8/9,0004.10.AA99/02/6,0000.10.AA79/71/210.0.2.1V
PS32699/8/9,0004.10.AA99/02/6,0000.10.AA7V00.1VE.0
PN32699/8/9,0004.10.AA99/02/6,0000.10.AA79/71/210.0.2.1V00.1VE.0
6 WELCH ALLYN ATLAS MONITO R SERVICE MANUAL 6200-43E REV. A
Section 2 - Service
2.3.1 BP Calibration :
Need: 500cc vessel (approximate)
calibrated digital manometer
squeeze bulb with one-way valve
tubing and T fittings
PC with HyperT erminal *
serial cable
2.3.1.1 Connect: manometer, bulb, and 500cc vessel
to BP port with “T” connectors, Atlas to PC
with serial cable.
2.3.1.2 Turn AtlasON and start HyperTerminal on PC.
2.3.1.3 Enter commands on Serial interface:
Pangea> bp valve close<ENTER>
Pangea> bp safety off<ENTER>
2.3.1.4 Enter command:
Pangea> bp cal 5000
Do not press <ENTER> yet!
2.3.1.5 Raise pressure with bulb to as close to
50.00mmHg as possible or slightly higher. Let
the pressure bleed down toexactly
50.00mmHg. Now press <ENTER> . Take no
more than 3 minutes for this step.
2.3.1.6 Enter command:
Pangea> bp cal 25000<ENTER>
2.3.1.7 Repeat step 2.3.1.5 with 250.00 as target.
Press <ENTER> when pressure deteriorates to
250.00 mmHG.
2.3.1.8 Enter command:
Pangea> nvram write<ENTER>
2.3.1.9 Disconnect serial cable and instruments and
cycle power on Atlas. BP cal complete.
2.3.1.10 Verify accuracy of pressure settings
by repeating step 2.3.1.3 then 2.3.1.5 and
compare Atlas front panel reading with Setra
readout. Do this at 50.00mm and 250 mm Hg.
2.3 Calibration
2.3.1 BP Calibration
Caution: Improper use, storage, handling of compressed
gas vessels can cause injury
or death! Follow gas manufacturers safety processes.
500cc volume
Setra
Figure 2.3.1.1
*Access and set up
HyperT erminal:
1-Start
2-Settings
3-Control Panel
4-Add/Remove Programs
5-Windows Setup
6-Communications
7-selectHyperT erminal
8-APPL Y
Settings are:
9600 Baud, 8 bit word, 1 stop bit
no parity , no flow control
ANSI character set
Find HyperT erminal in Programs,
Accessories
2.3.2 ET CO2 Calibration: 623 Models only
Need: T ank of approximately 10% CO2, balance N
2
(certified) Blood Gas Mixture
Tubing and T connectors
Watertrap and scrubber
2.3.2.1 Insert water trap. Power up.
2.3.2.2 Place the instrument into Service Mode: Press
Date/Time Lead Select button.
2.3.2.3 Select Calibrate CO
2
Message “Remove CO2 water trap” will
appear.
SERVICE MANUAL 6200-43E REV . A WELCH ALLYN ATLAS MONITOR 7
2.3.2 ET CO2 Calibration
NOTE:Replace water trap
every 6 hrs of use. Treat
water trap and used
NasalCO2 Sample lines
as bio hazard material!
NOTE: The Scrubber looks
similar to a watertrap, but
is filled with white granules.
It is included with model
623XX.
Section 2 - Service
Note
approximately 2 PSI.
: Adjust regulator to
valve
2
CO
watertrap
Figure 2.3.2.11
vent
2.3.2.4 Remove water trap from water trap socket .
2.3.2.5 Message “Install scrubber” will appear .
2.3.2.6 Attach scrubber to water trap.
2.3.2.7 Insert scrubber/water trap assembly into water
trap socket.
Message “Enter span gas value using
<Set> button” will appear.
2.3.2.8 Change the default value (10%) to the value of
span gas being used (calibrated 8% to 12%
concentration known to ±0.01%).
2.3.2.9 Press <BP Start/Cancel>
Message: “Sampling” appears while the
instrument is sampling the scrubber air.
2.3.2.10 When instructed, remove the scrubber from
the CO2 water trap. Do not remove water trap.
2.3.2.1 1 Attach the calibrated source of CO2 gas
to the CO2 side-stream sampling tube as per
Figure 2.3.2.1 1
2.3.2.12 Adjust the CO2 regulator just enough to
allow a small amount of gas to flow out of the
vent (approximately 3 PSI).
NOTE:Replace water trap
every 6 hrs of use. Treat
water trap and used
NasalCO2 Sample lines
as bio hazard material!
SR856: CO2 Calibration
beyond the year 2021
Important: Once positive flow is
established, let the it flow for one minute
before pressing the Continue button and
actually sampling.
After one minute, press the Continue
button to let the Atlas start sampling CO
2.3.2.13 Press <BP Start/Cancel>
Message: “CO2 calibration successful” or
“CO2 calibration failed” will appear on
th e CRT display .
(Note: Serial Communication is not the cause of a failure
if the Prion Serial appears in the Service Screen.
Therefore the problem is with the board or connections
and not serial communication problems.)
2.3.2.14 Press Trend button to Exit.
T o calibrate the CO2 system in years 2022 or later it is
necessary to reset the system clock to an earlier year ,
perform the calibration, and then set the clock to the
correct year again. The service center should keep a
record of this since the Cal display in the Service Mode
screen will be incorrect.
2.
.
8 WELCH ALL YN A TLAS MONITOR
SERVICE MANUAL 6200-43E REV. A
Section 2 - Service
2.3.3 CO2 RESET
Need: Watertrap and Scrubber
2.3.3.1 Press the Date/Time button on the lower
right of the monitor. The Set Date and T ime
and Other Options menu will be displayed.
2.3.3.2 Select the Reset CO2 selection by pressing
the CO2/RESP ALARMS Off button.
CO2 Reset screen will appear.
2.3.3.3 Follow the instructions on the screen.
“Remove the CO2 watertrap”.
“Install the CO2 Scrubber onto the CO
watertrap.”
NOTE: The Scrubber looks similar to a watertrap,
but is filled with white granules. It is included
with model 623XX.
2.3.3 CO2 RESET
2
2.3.3.4 Remove the tubing from the watertrap and
attach the Scrubber to the watertrap.
2.3.3.5 Insert the watertrap/Scrubber combination
into the watertrap socket.
2.3.3.6 Messages: The system will report that it is
Sampling. The system will then report Reset
Complete.
2.3.3.7 Remove the watertrap/Scrubber from the
watertrap socket.
2.3.3.8 Detach the Scrubber from the watertrap and
reattach the tubing.
2.3.3.9 Replace the watertrap in the watertrap socket.
2.3.3.10 Press Trend to return to the waveform
screen.
NOTE: There may be a
message indicating a 5
minute Warming Up period.
SERVICE MANUAL 6200-43E REV . A WELCH ALLYN ATLAS MONITOR 9
Section 2 - Service
2.3.4
PRINTER CALIBRATION
Note: Two lines are displayed:
Waveform +128, Text +70
These two numbers are factory
defaults and a good starting point
if the system is printing very
poorly or not at all.
The LEFT<SET> button controls
the Waveform setting, up and
down. The RIGHT <SET> button controls the Text setting, up
and down. Make changes tothe
settings as needed, where a
larger number = darker printing
and a smaller number = lighter
printing. Make initial changes of
about 10 points each time. After
making an adjustment, press
<TREND> to exit the Service
Mode.
2.3.4 PRINTER CALIBRA TION
Need:
PC with HyperT erminal
Serial cable
Connector
2.3.4.1 Use HyperTerminal to get strobe width
settings for printer normal for waveforms text for trend
Advanced configuration printing:
Pangea> nvram get
printer_strobe_width_normal<ENT>
(normal value 130)
Pangea> nvram get printer_strobe_width_text<ENT>
(normal value 70)
2.3.4.2 Change values - larger number for darker
printing. Change with:
Pangea> nvram set printer_strobe_width_normal XX X
Pangea> nvram set printer_strobe_width_text YYY
2.3.4.3 Test and reset until satisfied.
2.3.4.4 Press Trend button to exit the Service Mode.
2.3.5 BA TTER Y VOLTAGE
CALIBRA TION
2.3.5 BA TTERY VOL T AGE CALIBRA TION for models
622XX and 623XX.
NOTE: CHECK BA TTERY VOL T AGE CALIBRA TION
AFTER REPLACING MAIN PCB.
Need:
DC power supply rated: 7 VDC at 5A
Battery eliminator cable - Atlas battery plug on one
end, interface to the power supply on the other.
There should be access for voltmeter probes at
the Atlas end of the cable when it is installed
DMM / DVM with 10mV resolution on a 10V scale
PC with HyperT erminal
Serial cable and connector
2.3.5.1. Connect serial cable to PC and Atlas
2.3.5.2 Remove battery from Atlas
2.3.5.3 Set the power supply to 6.8V +/- 200mV
2.3.5.4 Connect the power supply to the Atlas battery
connector .
2.3.5.5 Turn At las ON.
2.3.5.6 Reduce the power supply to 6.0V
10 WELCH ALL YN A TLAS MONITOR
SERVICE MANUAL 6200-43E REV. A
Section 2 - Service
2.3.5.7 Measure the voltage at the battery connector
(at the Atlas) to the nearest 10mV .
NOTE: Do not measure at the power supply , since
cable resistance will introduce error.
2.3.5.8 At the HyperT erminal, type:
Pangea> power cal XXXX<ENTER>
(where XXXX represents the measured voltage in
millivolts no decimal point.) For example, if you
measured 6.010V at the battery connector , use the
command “power cal 6010<ENTER>”.
2.3.5.8 The Atlas will respond:
raw = ZZZZ mV true = 6010 mV OK
(where ZZZZ is the raw uncalibrated reading that the
instrument made.)
2.3.5.9 Reduce the power supply to 5.6 volts. Y ou
should soon hear the “low battery” alarm.
2.3.5.10Measure the voltage at the battery connector
to the nearest 10mV .
2.3.5.1 1At the HyperT erminal, type:
Pangea> power cal XXXX<ENTER>
(where XXXX represents the measured voltage in
millivolts no decimal point.) For example, if you
measured 5.590V at the battery connector , use the
command “power cal 5590<ENTER>”.
2.3.5.12
raw = ZZZZ mV true = 5590 mV OK
The Atlas will respond:
(where ZZZZ is the raw uncalibrated reading that the
instrument made.)
2.3.5.13
Pangea> hw reset<ENTER>
2.3.5.14 Turn Atlas OFF and remove the power
supply .
2.3.5.15 Re-Install the battery .
SERVICE MANUAL 6200-43E REV . A WELCH ALLYN ATLAS MONITOR 11
Finish by typing: (this will re-boot A TLAS)
Section 2 - Service
2.3.6 TEMPERATURE
MEASUREMENT
SUBSYSTEM
CALIBRATION
2.3.6 TEMPERA TURE MEASUREMENT
SUBSYSTEM CALIBRA TION:
Need:
PC
Serial Cable
HyperTerminal
1kOhm - 2kOhm 1% 1/2watt resistor
Large RCA plug (1/4”) 2 conductor
Short length of wire (optional)
Soldering iron and solder
2.3.6.1Prepare Resistor/Plug assembly .
Solder the resistor across RCA plug
terminals.
2.3.6.2 Plug the resistor assembly into the Atlas
T emperature jack.
2.3.6.3 Connect the Atlas to the PC serial port.
2.3.6.4 Turn the Atlas ON.
NOTE: T emperature display will show a valid
temperature.
2.3.6.5 Start HyperTerminal on the PC.
2.3.6.6 At the Pangea prompt, type:
Pangea>temp cal xxxxxx<ENTER>
(where the xxxxxx is the value of the precision resistor
in centiOhms- Specify the Ohms, tenths, and
hundredths of Ohms with no decimal point- for
example, a 1200.00 Ohm resistor would be:
Pangea>temp cal 120000<ENTER>
2.3.6.7
Wait four seconds then type:
Pangea>temp state<ENTER>
2.3.6.8 Displayed resistance will be within 0.5
Ohms of the value that you entered.
The Offset should not exceed 5.0 Ohms.
NOTE: The system will silently fail (without error) if it
is unable to calibrate properly . Therefore you
must manually verify that this resistance is
correct.
2.3.6.9 Turn the Atlas OFF.
2.3.6.10Unplug the resistor/plug assembly.
2.3.6.1 1Remove the serial cable.
2.3.6.12Check the accuracy of the
temperature sensing system using the
process described in Section 2.2.1 1
12 WELCH ALL YN A TLAS MONITOR
SERVICE MANUAL 6200-43E REV. A
Section 2 - Service
2.3.7Set battery charging voltage:
Specification :No Load: 6.85VDC
Need: DVMM
2.3.7.1Remove battery from unit and unplug.
2.3.7.2Use DVMM to check across right pin (+)
and left pin (-) when viewed looking into
the battery compartment.
2.3.7.3Adjust potentiometer R338 to obtain
6.85VDC. (It is located at the right of the
battery jack.
Turn it counterclockwise to increase the
charging voltage.
2.3.7 Set Battery Charge
Voltage
SERVICE MANUAL 6200-43E REV. A WELCH ALLYN ATLAS MONITOR 13
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14 WELCH ALLYN ATLAS MONITOR SERVICE MANUAL 6200-43E REV. A
Section 2 - Service
2.4 Downloading Operating System
When required: to load latest revision software*
o na fully functioning Atlas or to reload software
after replacing the MCU board. The
atlas_dl.exe program loads the following files:
atlas.out.gz
nvram_common.txt
nvram_(model#).txt **
nvram_(language).txt **
Equipment or supplies required:
PC with Windows ‘95/NT
Serial cable with connector: (COM1to PC)
File : atlas_dl.exe
2.4.1 Connect serial cable between Atlas and
PC COM1
2.4.2 Double click “atlas_dl.exe” explorer window
2.4.3 After downloading is complete, check alarm
and other User controlled advanced
configuration settings since these are ‘reset’ by
this downloading process.
2.4 Downloading Operating System
(when upgrading software or
replacing CPU board)
**Note: Hyperterminal
queries the Atlas to determine which model number
and language to download.
Note: If Atlas calibration
was satisfactory prior to
downloading software
then recalibration is not
required.
Downloading Operating System complete
2.5 Downloading NVRAM files with Hyperterminal*.
The NVRAM resides on Main Board. Hyper
terminal loads the following files:
cal_init.txt
common.txt
(model#).txt **
(language).txt,**
printer .txt (if required),
or no_printer.txt.
2.5.1Connect serial cable between Atlas and
PC COM1 as in 2.4 above.
2.5.2Open HyperT erminal program on PC:
ST ART
PROGRAMS
ACCESSORIES
HYPERTERMINAL
2.5.3Turn Atlas ON. You should see some
version information and a prompt:
Pangea>
2.5.4 Transfer Text files:
(TRANSFER/SEND TEXT FILE)
NVRAM_CAL_INIT .TXT (only if main board has been
replaced)
2.5 Downloading NVRAM
T ext files
after replacing Main Board
*Configure HyperT erminal
9600 Baud
8 bits
1 stop bit
no parity
no flow control
SERVICE MANUAL 6200-43E REV . A WELCH ALLYN ATLAS MONITOR 15
Section 2 - Service
2.5 Downloading NVRAM
T ext files
when replacing Main Board
continued
2.6 Downloading Soft-
ware &
NVRAM T ext files
after replacing Main Board
AND CPU board
NVRAM_COMMON.TXT
NVRAM_NO_PRINTER.TXT
or
NVRAM_PRINTER.TXT
NVRAM_(model 200,210,220).TXT
NVRAM_<LANGUAGE>.TXT
2.5.5 After these text files are transferred,
T ype the following serial commands to update
the serial number:
nvram set serial___ (last 3 digits of serial#)
nvram write
hw reset (hardware reset restartsAtlas and
saves the new settings)
2.5.6 Verify the serial number correct
2.5.7 Recalibrate Atlas unit. After calibration is
complete.
2.5.8 Check alarm settings and User selected
advanced Configurations
2.6 Downloading Software & NVRAM T ext files
2.6.1 Use atlas_dl.exe as in step 2.4. to Program
ne w CPU board.
2.6.2 Use HyperTerminal as in step 2.5 to set
NVRAM on new Main Board.
2.6.3 Recalibrate Atlas
2.6.4 Check alarm settings and User selected
advanced Configurations
16 WELCH ALL YN A TLAS MONITOR
NOTE: Firmware Download
Software versions of OEM boards are not field
upgradeable. (SpO2 boards or the CO2 board.)
Replace the subsystem board with a higher
(current) version if necessary .
SERVICE MANUAL 6200-43E REV. A
Section 2 - Service
2.7 Product Model Number Structure
621S0* ECG, Nonin SpO2, NIBP
621SP* ECG, Nonin SpO2, NIBP , Printer
622S0** ECG, Nonin SpO2, NIBP , Temp, Respiration, Battery, RS232, Nurse Call
622SP** ECG, Nonin SpO2, NIBP , Temp, Respiration, Battery, RS232, Printer , Nurse Call
622N0** ECG, Nellcor SpO2, NIBP , Temp, Respiration, Battery, RS232, Nurse Call
622NP** ECG, Nellcor SpO2, NIBP , Temp, Respiration, Battery, RS232, Printer , Nurse Call
623SP** ECG, Nonin SpO2, NIBP , ETCO2, T emp, Respiration, Battery , RS232, Printer , Nurse Call
623NP** ECG, Nellcor SpO2, NIBP , ETCO2, T emp, Respiration, Battery , RS232, Printer , Nurse Call
SUFFIX:
Use letter designation for language localization as follows:
E = English, F= French, G= German, I= Italian, S= Spanish, P= Portuguese C = Chinese, J= Japanese
Use number designation for line cord localization as follows:
1 = US, Canada, Japan Version
2 = European Version
4 = United Kingdom Version
6 = Australian Version
Specifications: See Operator Manual
Specifications for all of the above listed models of Atlas including performance, accuracy ,
range, size, weight, power, environmental, are documented in an appendix to the User
Manual.
* Model 200 Main Board and Schematic 200
** Model 220 Main Board and Schematic 220
SERVICE MANUAL 6200-43E REV. A
WELCH ALLYN ATLAS MONITOR 17
Section 3 - Troubleshooting
3.1 Functional Test and Initial Diagnostic
1.Review customer complaint and determine if it is
safe to plug in and turn on Atlas
2.Plug in Atlas, no sensors attached.
3.Check for AC~ LED lit.
4.Install paper in printer if fitted.
5.Turn on power
6.Green light in power button.
7.Loud beep when button pressed.
8.Three dashes in SYSTOLIC.
9.Three dashes in DIASTOLIC.
10.Two dashes in SpO2 (takes several seconds after BP
dashes come on).
11.Three dashes in PULSE (takes several seconds after
BP dashes come on).
12.Pleth: none, or a single bar at the bottom, or two bars at
the bottom.
13.No lights in TEMP.
14.No lights in ALARMS OFF buttons.
15.X lit on AUTO.
16.AC~ lit
17.CRT display comes on slowly if cold, quickly if still warm
from last use.
18.May see version string in center if comes on quickly, not
a problem if not seen because it comes on slowly.
19.CRT: three dashes for Heart Rate
20.Heart picture
21.Lead select symbol
22.Scale bar
23.One or two lines of dashes for waveforms – depends
upon settings.
24.Three dashes for MAP – or blank, depends upon
settings.
25.Error message(s) at bottom of screen?
Note: “Idle” screen is normal
waveform display.
26.If 622 or 623, pull AC cable. Should be no change
except AC~ unlit.
26.1. If errors of low, very low or depleted battery,
or if system dies, plug back in and repeat
test in 2 hours.
SERVICE MANUAL 6200-43E REV. A
WELCH ALLYN ATLAS MONITOR 1
Section 3 - Troubleshooting
3.1 Functional Test and Initial Diagnostic
Plug AC back in.
MENU TESTS
27.Press <DA TE/TIME><TREND>
28.Get Advanced Configuration menu.
29.Write down all settings for resetting to customer preference later.
30.Set language to your native tongue if necessary to
allow you to write down the other settings. The top
item is always the language, press either <SET> button
to step through list.
31.Press <PRINT> if printer fitted.
32.Press <TREND> to return to idle screen.
33.Press <DA TE/TIME>
34.Get date/time menu.
35.V erify date/time, set if necessary .
35.1. Bad date may indicate battery problem. If
date was bad, turn off unit, pull power cable,
wait 5 minutes reconnect power cable, turn
on unit. Check date again.
35.1.1. If date comes back bad: Replace
main board Model 200. Model 210,
220, if battery not dead replace main
board.
Press Date/Time to return to waveform screen if needed.
36.Press <DATE/TIME><LEAD SELECT>
37.Get Service Mode menu.
38.Examine version/configuration data in lower half of
menu, and write it all down.
39.Press <SELECT> to highlight Reset to factory de-
faults.
40.Press <BP START/CANCEL> to reset configuration.
41.Press <TREND> to return to idle screen.
42.Press <DA TE/TIME><TREND>
43.Get Advanced Configuration menu.
44.Set language to your native tongue if necessary
44.1. We have just reset to factory defaults.
Compare settings to factory defaults appropriate for the country – in Operator manual. Ifno t
matching, indicates memory problems.
Changing only the language should not change
any of the other factory default settings.
45.Press <DATE/TIME><LEAD SELECT>
2 WELCH ALL YN ATLAS MONITOR
SERVICE MANUAL 6200-43E REV. A
Section 3 - Troubleshooting
46.Get Service Mode menu.
47.Press <Select> to highlight CRT test pattern.
48.Press <BP START/CANCEL> to show test pattern.
Examine display .
49.Press any key to end display .
50.Press <Select> to highlight Printer test pattern (if
fitted).
51.Press <BP START/CANCEL> to start test pattern.
52.Printer should print test pattern.
53.Press any key to end display .
54.Examine printout.
55.Press <Select> to highlight LED test .
56.Press <AUTO> to turn on all LEDs .
57.Press <BP START/CANCEL> to show automatic test
pattern.
58.Watch for a while, look for glitches in pattern.
59.Press <Set> to go to manual mode and step through
individual segments if needed to observe a problem.
3.1 Functional Test and Initial Diagnostic
60.Press <Select> to highlight Button test.
61.Press <BP START/CANCEL> to start test.
62.Press every button on system, <BP ST ART/CANCEL>
last.
62.1. Verify that buttons match up with their names,
and that all buttons are functional.
62.1.1. If names don’t match, indicates
memory corruption: Replace main
board
63.Press <Select> to highlight Display A/D channels
(three or four screens worth)
63.1. Write down all values for later review.
63.2. Press <Set> and write down all values for
each screen.
64.Press <Trend> to return to Idle screen.
65.Connect the BP port to the BP simulator.
66.Set the simulator for a normal reading (140/80,
100BPM, NSR).
67.Press <BP START/CANCEL>
67.1. System should start pump, display manom-
eter value in SYSTOLIC LED; this value
should track and be very close to pressure
BP test
SERVICE MANUAL 6200-43E REV. A
WELCH ALLYN ATLAS MONITOR 3
Section 3 - Troubleshooting
3.1 Functional Test and Initial Diagnostic
displayed by manometer in BP simulator (if
fitted). Largest number shown in SYSTOLIC
should be very close to the Initial pressure
setting recorded above from Advanced
Configuration.
67.2. System should step down pressure, showing
step values in SYSTOLIC LED, and then display correct SYSTOLIC and DIASTOLIC
values. System may show MAP value depending upon country .
68.Press <DA TE/TIME><TREND> to get to Advanced
Configuration menu.
69.Press <Select> to highlight Initial pressure.
70.Press <Set> to change Initial pressure to 280 mmHg.
71.Press <Select> to highlight MAP.
72.Press <Set> to change MAP to Yes.
73.Press <TREND> to return to idle screen.
74.Press <BP START/CANCEL>
75.System should start pump, display manometer value in
SYSTOLIC LED; this value should track and be very
close to pressure displayed by manometer in BP
simulator (if fitted). Largest number shown in SYSTOLIC should be very close to the Initial pressure
setting of 280 mmHg.
75.1. If pressure shown exceeds 300 mmHg:
Recalibrate BP
76.System should step down pressure, showing step
values in SYSTOLIC LED, and then display correct
SYSTOLIC and DIASTOLIC values. System should
show MAP value. MAP value should match what is
shown by simulator.
77.Set simulator to highest Systolic <=250, lowest Diastolic >= 30, and lowest heart rate >=30.
78.Press <AUTO>
79.X goes unlit, 1 flashes for 10 seconds.
80.20 seconds after 1 stops flashing, BP measurement
starts.
81.BP reading as above.
81.1. If BP does not start: Replace main board
81.2. If BP measurement incorrect recalibrate
4 WELCH ALL YN ATLAS MONITOR
SERVICE MANUAL 6200-43E REV. A
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