Novametrix 511 Service Manual

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Page 1

PRELIMINARY

Model 511

Service Manual

July 18, 1994

Part Number 6116-90-00

Novametrix Medical Systems Inc.

Wallingford, Connecticut, U.S.A. 06492.

this manual may be reproduced without the written

permission of Novametrix Medical Systems Inc.

Page 2

PRELIMINARY

Page 3

PRELIMINARY

18-Jul-94 Release Version 00

Revision History

18-Jul-94 Model 511 Service Manual III

Page 4

Section Revision History

PRELIMINARY

[This page intentional ly bl ank.]

Model 511 Service Manual 6116-90-00

Page 5

PRELIMINARY

Equipment manufactured or distributed by Novametrix Medical Systems Inc., is fully guaranteed, covering materials and workmanship, for a period of one year from the date of shipment, except for certain disposable products and products with stated guarantees other than one year. Novametrix reserves the right to perform guarantee service(s) at its factory, at an authorized repair station, or at the customer’s installation.

Novametrix’ obligations under this guarantee are limited to repairs, or at Novametrix’ option, replacement of any defective parts of our equipment, except fuses, batteries, and calibration gasses, without charge, if said defects occur during normal service.

Claims for damages during shipment must be filed promptly with the transportation company. All correspondence concerning the equipment must specify both the model name and number, and the serial number as it appears on the equipment.

Improper use, mishandling, tampering with, or operation of the equipment without following specific operating instructions will void this guarantee and release Novametrix from any further guarantee obligations.

Guarantee

Service Department

For factory repair service, call toll free

1-800-243-3444

In Connecticut, call Collect (203) 265-7701

Telex 956-054

Facsimile (203) 284-0753

Caution: Federal (U.S.A.) law restricts this device to sale, distribution, or use by or on the order of a licensed medical practitioner.

Copyright  1994, Novametrix Medical Systems Inc. This document contains information which is proprietary and the property of Novametrix Medical Systems Inc., and may not be reproduced, stored in a retrieval system, translated, transcribed, or transmitted, in any form, or by any means, without prior explicit written permission from Novametrix Medical Systems Inc.

18-Jul-94 Model 511 Service Manual V

Page 6

Section Guarantee

PRELIMINARY

Service Policy

Novametrix Medical Systems Inc. will provide W arranty Service Support to its customers within 48 hours of receiving a telephon e request for technical su pport. This 48 hour pe riod begins once a service request is placed through the Factory Technical Support Department in Wallingford, Connecticut. Novametrix provides factory direct technical support to its customers through a technical support group located in Wallingford, Connecticut and company service representatives located throughout the United States. All Technical Support for Novametrix products is provided “Factory Direct”.

Novametrix provides 24 hour a day technical support accessibility via telephone numbers (800) 2433444 or (203) 265-77 01 . Aft er hou rs technical support requests ( before 8:00 AM and after 5:00 PM Eastern Time) will be responded to promptly by the Technical Support On-Call staff. It is suggested that any person calling in for technical support have the inoperative equipment available for preliminary troubleshooting as well as product identification. Novametrix reserves the right to repair or replace any product found to be defecti ve during the warranty period. Repair may be pro v ided in the form of replacement exchange parts or accessories, on-site technical repair assistance or complete system exchanges. Repairs provided due to product abuse or misuse will be considered “non-warranty” and invoiced at the prevailing service rate. Any replaced defective material is expected to be return ed to Novametrix within 10 days of be ing pr ov ided in or der to avoid addit ional charges. Exchanged material should be returned promptly and directly to Novametrix using the return paperwork an d shipping label(s) provid ed. Transferring return materia ls to local sales or dealer representatives does not absolve return responsibility.

Novametrix manufactures eq uipment that is generally “user serviceable” and can usually be repaired with the replacement of a plug-in electro-mechanical assembly by the clinical end user . When repair parts are provided, the recipi ent can call into Novametrix for on-line replacement assistance and repair assurance. In the event a replacement part requires increased technical capability, Technical Support may request Biomedical assistance, provide on-site technical support or complete replacement equipment. If the customer requires the return of their original product, the exchange material will be considered “loaner material” and exchanged again after the customer equipment is repaired.

Novametrix promotes customer participation in warranty repairs should they become necessary. This program allows for customer training and a smooth transition into self-maintenance after warranty, which can provide substantial cost savings on repairs thro ughout the product’s life.

The Novametrix Technical Support Department can provide technical product support at a level appropriate to most customers protocol and budget requirements. Please contact the Technical Support Group at Novametrix for additional information.

Additional Novametrix Technical Support Programs

• Focus Series Technical Training Seminars

• Test Equipment and Test Kits

• Service Contract / Part Insurance Plans

• Equipment Calibration Services

• On-Site Technical Support

• 24 hr. telephone support

• “Demand Services” Flat rate parts-exchange, Flat rate return for repair Time and Material, Full warranty, discounted replacement sensors

Model 511 Service Manual 6116-90-00

Page 7

PRELIMINARY

Title Section Page

Revision History...............................................................R..................III

Guarantee......................................................................... G ..................V

Table of Contents.............................................................C.................VII

List of Figures.......................... .... ..... ...............................F..................IX

List of Tables................................................... .................T........ ..... .... .XI

Introduction................................................ ..... ..... .... ........1 ...................1

Purpose ......................................................................................... 1.1.................... 1

Technology Description ................................................................. 1.2....................1

Conventions Used In This Manual................................................. 1.3....................2

Acknowledgments.......................................................................... 1.4....................2

Patient Safety...................................................................2...................3

Warnings...........................................................................3 ...................4

Table of Contents

Cautions............................................................................ 4 ...................5

Front Panel.......................................................................5...................6

Summary of Operation....................................................6...................7

Power On/Off................................................................................. 6.1....................7

Audible Alert Enable/Disable......................................................... 6.2....................7

Battery Life..................................................................................... 6.3....................8

Electronic Theory of Operation......................................7 ................... 9

2710 Analog Board........................................................................ 7.1....................9

Power Supply.......................................................................... 7.1.1.................9

Voltage Reference .................................................................. 7.1.2...............11

Sensor LED Drive Circuits ...................................................... 7.1.3...............11

Sensor Photodiode Return Path ............................................. 7.1.4...............14

Calibrating the 20-Bit Analog-to-Digital Convertors ................ 7.1.5...............15

20-Bit Analog-to-Digital Conversion........................................ 7.1.6...............16

Sensor Status Decoding and Conversion ............................... 7.1.7...............16

Sensor Status Parameters ...................................................... 7.1.8...............17

2711 Digital Board ......................................................................... 7.2..................18

Microprocessor and Memory................................................... 7.2.1...............18

Decoding................................................................................. 7.2.2...............19

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Page 8

Section Table of Contents

PRELIMINARY

Microprocessor Supervisor ..................................................... 7.2.3............... 20

Front End Timing Signals........................................................ 7.2.4 ...............21

System Output Ports............................................................... 7.2.5...............22

Serial I/O Controller................................................................. 7.2.6...............23

Display .................................................................................... 7.2.7............... 24

Maintenance.....................................................................8 .................25

General.......................................................................................... 8.1 .................. 25

Maintenance Schedules ................................................................ 8.2 ..................25

Cleaning and Sterilization.............................................................. 8.3..................26

Model 511 Monitor .................................................................. 8.3.1............... 26

Finger Sensor.......................................................................... 8.3.2...............26

Y-SENSOR™ and Y-STRIP™ Taping System....................... 8.3.3...............26

Battery Installation ......................................................................... 8.4..................26

Assembly Exchanges .................................................................... 8.5 .................. 28

Changing System Software........................................................... 8.6 .................. 30

Status Messages..............................................................9.................31

Status Messages and Fault Indicators........................................... 9.1..................31

Functional Test ................................................................10...............35

Introduction.................................................................................... 10.1................35

Monitor Functional Test ................................................................. 10.2 ................ 35

Accuracy Test ..................................................................11 ...............39

Introduction.................................................................................... 11.1................39

Monitor Accuracy Test................................................................... 11.2................ 39

Electronic Test.................................................................12 ...............43

Introduction.................................................................................... 12.1................43

Monitor Functional Test ................................................................. 12.2 ................ 43

2710 Analog Board ................................................................. 12.2.3.............44

2711 Digital Board................................................................... 12.2.7 .............44

System Check......................................................................... 12.2.13...........45

Specifications................................................................... 13 ...............49

General.......................................................................................... 13.1 ................ 49

Oxygen Saturation (SpO2)...................................................... 13.1.1.............49

Pulse Rate............................................................................... 13.1.2 .............49

General Specifications ............................................................ 13.1.3.............49

Parts Lists.........................................................................14 ...............51

Model 511 Assemblies................................................................... 14.1................51

Schematic and Assembly Drawings..............................15...............59

VIII

Model 511 Service Manual 6116-90-00

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PRELIMINARY

Figure Description Page

Figure 1.........Front panel illustration ................................ ...................... .. ........ 6

Figure 2. ........ Revision 00 power turn on circuitry........................................... 10

Figure 3. ........ Fuse protection modification..................................................... 10

Figure 4.........Fuse protection modificati on on newer revision boards............ 11

Figure 5. ........ Revision 00 LED drive circuitry................................................. 12

Figure 6. ........ Revision 01 board drive circuitry............................................... 13

Figure 7. ........ Revision 02 LED drive circuitry................................................. 14

Figure 8.........Revision 00 PRAMCS* configuration........................................ 19

Figure 9.........Revision 00 watchdog circuitry................................................. 21

Figure 10. ......Battery orientation..................................................................... 27

List of Figures

Figure 11. ......Removing the top cover............................................................ 28

Figure 12. ...... Monito r disassembled........................... ................ ............... ..... 28

Figure 13.......Disconnecting keypanel ribbon cable. ................................ ...... 29

Figure 14.......Changing the system software EPROM................................... 30

Figure 15. ...... Statu s me s s age s an d n um e ric a l c o d es .. ................ ............... ... 31

Figure 16.......Front panel................................................................................ 35

Figure 17. ......Sensor off patient display ......................................................... 36

Figure 18. ......Applying sensor for functional test............................................ 36

Figure 19. ......Sensor off patient display ......................................................... 37

Figure 20. ......LCD display with all segments on............................................. 40

Figure 21. ...... Alert display ........... .. ................ ............... ................ ............... ... 41

Figure 22.......Application of Y-sensor and Finger sensor............................... 41

Figure 23.......Cutaway showing location of C24 on the 2710 analog board... 44

Figure 24.......Connecting external DC supply to the 2711 Digi tal Board........ 45

Figure 25.......2711 Digital board power up display . ........................................ 45

18-Jul-94 Model 511 Service Manual IX

Page 10

Section List of Figures

PRELIMINARY

Figure 26.......Connecting membrane keypanel...................................... .. ...... 46

Figure 27.......Connecting external DC supply................ ................................ 46

Figure 28. ......Display at power up with all segments active ........................... 47

Model 511 Service Manual 6116-90-00

Page 11

PRELIMINARY

Table Description Page

Table 1. .........2711 digital board decoding lines ............................. .. .. ............19

Table 2. .........Front end timing signals .......................................... ..................22

Table 3. .........Output port li nes ...................................... .................................23

Table 4. .........CSI/O decode lines ........................................ ...........................23

Table 5. .........Status messages ......................................... .............................32

Table 6. .........Error codes ...............................................................................32

Table 7. .........Saturati on values using sensor simulator .................................40

Table 8. .........2710 analog board voltage checks ......... ..................................44

Table 9. .........Schematic and Assembly Drawings ..........................................59

List of Tables

18-Jul-94 Model 511 Service Manual XI

Page 12

Section List of Tables

PRELIMINARY

XII

Model 511 Service Manual 6116-90-00

Page 13

Introduction

Purpose

This manual has been prepared for technicians servicing the Novametrix Model 511 Pulse Oximeter. It presents technical informa tion relating to t he monitor’s theory of operation, maintenance, calibration and repair. Refer to the Pulse O ximeter Model 511 User’s Manual (Catalog Number 6116-23) for additional information.

Technology Description

The Model 511 measures oxygen saturation and pulse rate with sensors that contain red and infrared light sources, called LEDs. Since oxygen saturated blood absorbs different amounts of light at each wavelength (red a nd infrared) as compared to unsaturated blood, the amount of light absorbed by the blood in each pulse can be used to calculate oxygen saturation.

The light energy from red (660 nm) and infrared (940 nm) LEDs is beamed through a sample cell—a pulsating vascular bed, the patient’s finger or toe for example. The remaining light energy not absorbed by the sample cell reaches a light receptor, called a photodiode, on the opposing side of the sensor. The data received at the photodiode is sent back to the monitor where it is split into its red and infrared components, digitized, processed by a microprocessor chip, and finally displayed as a numerical value for oxygen saturation and a plethysmogram.

1.1

1.2

The Model 511 is calibrated to display “functional” saturation. This differs from the “fractional” saturation value displayed by most co-oximeters. Functional saturation represents the amount of oxyhemoglobin as a percentage of the hemoglobin that can be oxygenated. Dysfunctional hemoglobins (COHb and METHb) are not included in the measurement of functional saturation.

Calculating Functional Oxygen Saturation

Pulse Rate is calculated by measuring the time interval between the peaks of the infrared light waveform. The inverse of this measurement is displayed as pulse rate.

The Model 511 must be used in conjunction with OxySnap SuperBright™ saturation sensors. These sensors have an 8700 series part number (e.g., 8744 or

8793).

18-Jul-94 Model 511 Service Manual 1

Functional Saturation =

100 - (COHb + METHb)

HbO

HbO2 = Fractional Hemoglobin COHb = Carboxyhemoglobin METHb = Methemoglobin

Page 14

Section 1 Introduction

Conventions Used In This Manual

The following conventions will be used throughout this manual:

• Normal text will be shown in this type.

• Message Center alerts and displays will be shown

• The names of the front panel pushbuttons (keys) will be shown

in this type

in this type.

Acknowledgments

SuperBright, Y-STRIP and Y-SENSOR are trademarks of Novametrix Medical Systems Inc.

1.3

1.4

Model 511 Service Manual 6116-90-00

Page 15

For maximum patient and operator safety, the following are recommended;

• Failure of Operation: If the monitor fails to respond as described, do not use

it until the situation has been corrected by qualified personnel.

• Keep the Model 511 and its accessories clean.

• Do not operate the Model 511 when it is wet due to spills or condensation.

• Do not operate the Model 511 if it appears to have been dropped or damaged.

• Care should be exercised to assure continued peripheral perfusion distal to the SpO2 sensor site after application.

Patient Safety

Do be processed when the cuff is inflated. Attach the sensor to the limb opposite to the site used for the blood pressure cuff.

attach an SpO2 sensor distal to a blood press ure cuf f. Va lid data

NOT

CANNOT

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Page 16

• Explosion Hazard: Do NOT use the Model 511 in the presence of flammable anesthetics. Use of this instrument in such an environment may present an

explosion hazard.

• Electrical Shock Hazard: Always turn the oximeter off before cleaning it. Do NOT use a damaged sensor or one with exposed electrical contacts.

• Patient Safety: Care should be exercised to assure continued peripheral perfusion distal to the SpO2 sensor site after application.

• Failure of Operation: If the oximeter fails to respond as described, do not use it until the situation has been corrected by qualified personnel.

• Data Validity: Do NOT attach a sensor distal to a blood pressure cuff. Valid data CANNOT be processed when the cuff is inflated. Attach the sensor to the limb opposite to the site used for the blood pressure cuff.

• Data Validity: As with all pulse oximeters, ina ccurate SpO2 and Pulse Rate

values may be caused by:

Warnings

Warning

Indicates a potentially harmful condition

that can lead to personal injury.

• Incorrect application or use of a sensor

• Significant levels of dysfunctional hemoglobin; carboxyhemoglobin or methemoglobin

• Significant levels of indocyanine green, methylene blue, or other intravascular dyes

• Exposure to excessive illumination such as surgical lamps—especially ones with a xenon light source, or direct sunlight

• Excessive patient movement

• Venous pulsations

• Electrosurgical interference

4 Model 511 Service Manua l 6116-90-00

Page 17

• Do not operate the Model 511 when it is wet due to spills or condensation.

• Do not operate the Model 511 if it appears to have been dropped or damaged.

• Never sterilize or immerse the monitor in liquids.

• Do not sterilize or immerse sensors except as directed in this manual.

• No tension should be applied to any sensor cable.

• Do not store the monitor or sensors at temperatures less than 14° F (-10° C) or greater than 131° F (55° C).

• Do not operate the monitor or sensors at temperatures less than 50° F (10° C) or greater than 104° F (40° C).

• Caution: Federal (U.S.A.) law restricts this device to sale, distribution, or use by or on the order of a licensed medical practitioner.

Cautions

Caution

Indicates a condition that may lead to

equipment damage or malfunction.

18-Jul-94 Model 511 Service Manual 5

Page 18

Front Panel

SpO

SATURATION PULSE RATE

beats/min

511

Pulse Oximeter

Saturation and Pulse Rate display identifiers

LCD Display

Audible Alert Enable/Disable control

Po wer On/Off and Illumination control

DC input jack

Figure 1. Front panel illustration

6 Model 511 Service Manua l 6116-90-00

Page 19

Summary of Operation

Power On/Off

1. To turn the monitor on, press the power control.

A tone sounds to verify audio is functional, the monitor performs a system self-test, all display segments are briefly illuminated, the software version is displayed in the

RATE

section, and finally the operational display appears.

2. To illuminate the display for better viewability under low ambient lighting

conditions, press the power control key and hold until the backlight illuminates when turning the monitor on.

The display illumination will remain on until the monitor is turned off.

3. To turn the monitor off, press the power control.

SATURATION

section and the model number in the

Audible Alert Enable/Disable

1. To toggle between enabled and disabled audible alarms, press and release the

alarm key. If pressing and releasing the alarm key causes the alarms to be enabled, the

monitor shall display the saturation auto alert limit settings (in the SpO2 and pulse rate displays) for three seconds, beep once, and turn off the alarm icon.

The alarm display icon will not be displayed while audible al arms are enabled. All visible alerts continuously active for longer than 10 seconds will cause an unlatched audible alarm to sound.

6.1

PULSE

6.2

If pressing and releasing the alarm key causes the alarms to be disabled, the monitor shall beep once, and turn on the alarm icon. The alarm display icon will illuminate as a warning that the audible alarms are disabled.

2. To set alert limits, press and hold the alert key for more than 3 seconds. The

monitor will beep twice if new limits are set (based on valid SpO2 values). If no SpO2 is displayed, the monitor will use default limits and will beep three times.

18-Jul-94 Model 511 Service Manual 7

Page 20

Section 6 Summary of Operation

The Model 511 will display the high limit in the SpO2 display, the low limit in the pulse rate display for three seconds. The monitor will then return to

normal operation.

NOTE: Setting alert limits automatically enables the audible alarms.

To display limits without setting new limits if audio is enabled, press and release the alarm key twice. The first press turns off the alarms and the second turns then back on and causes the high and low limits to be displayed for one second. The monitor will then return to normal operation.

To display limits without setting new limits if the audio is disabled, press and release the alarm key. The high and low limits will be displayed for one second before the monitor returns to normal operation. Press the alarm key to disable the audible alarms.

Battery Life

The Model 511 displays a battery icon to indicate:

• fully charged batteries

• approximately one half the initial battery charge remains

• indicates less than 30 minutes of battery life remain. The battery icon may appear fully charged for the first minute after power up,

after which it will reflect the true battery charge. If the monitor continues operating while in the low battery st ate, the monitor eventually shuts itself off.

NOTE: The battery icon will remain on the display when the external DC supply is connected and powering the monitor. The icon will indicate the fully charged batteries condition, this in reality is an indication of the external DC supply, not the condition of the batteries. For proper indication of battery life the external DC supply must be unplugged from the monitor.

6.3

Model 511 Service Manual 6116-90-00

Page 21

Electronic Theory of Operation

The electronic theory of operation of the Model 511 Pulse Oximeter monitor is detailed in the subsections below. Section 15, on page 59 for more information.

There are subtle differences between the first rele ase circuit boards and the later revision, these are noted in the text with an explanation of the circuit operation.

Schematic and Assembly Drawings

2710 Analog Board

The 2710 Analog board contains the drive circuitry for the sensor’s LEDs, the photodiode’s detection circuitry, the power supply, and the turn on circuitry. The batteries and sensor are connected to the analog board, this is then connected to the 2711 digital board by two header connectors.

Power Supply

Power for the Model 511 Pulse Oximeter is derived from four 1.5 volt Alkaline batteries (see page 2 of schematic). These are connected to J404 on the 2710 Analog Board. Check the serial number suffix on the unit to determine the type of power up circuitry the monitor contains as described below. Different revision levels of the 2710 analog board will have differences in this circuitry.

Units with a “Z“ in the serial number suffix. Power enters J404 as VBAT, F202 protects against excessive current flow. When the PWRSWIN line pulses high the N-channel FET of IC17 will be biased on, this in turn biases the P-channel portion

7.1

7.1.1

18-Jul-94 Model 511 Service Manual 9

Page 22

Section 7 Electronic Theory of Operation

VBATT

PWRSWIN

F202

500ma

R13 100K

R12 511

D9 MMDB301L

J404 1,2

To IC15

IC17 Si9942

To Drain of Q2 and

R18 junction

R25

R23

C24

J401 11, 13

VBATT

VBATTF

on and allows power to flow through to IC15. Switching regul ator IC15 will supply

6.5 volts DC with an input voltage ranging from 4-6 volts DC.

Figure 2.

Revision 00 power turn on circuitry

In order to prevent F202 from blowing in the event that the batteries are installed incorrectly, a MOSFET is used. The modification is shown below.1 Later revision boards have this modification designed in.

pins 1, 2, 3 to units positive input (red)

MOSFET

pins 5, 6, 7, 8 to positive terminal of DC input jack (red)

Model 511 bottom case half

MOSFET: PN: 485538

(Si 9405)

pin 4 to battery ground (black)

Model 511 Service Man ual 6116-90-00

1. Units with this modification can be identified by a “Z” in the serial number suffix.

Figure 3.

Fuse protection modification

Page 23

2710 Analog Board

For units with a “W“ and/or “X” in the ser ial number suff ix. Power enter s J404 as BATTERY, provided that the batteries are properly installed, 1/2 of IC17 (pins 1, 2, 7, and 8) will be biased on. F202 protects against excessive current flow and diode D9 protects against over-voltage. When the PWRSWIN line pulses high then Q9 will be biased on, this in turn biases the second P-channel portion of IC17 on and allows power to flow through to IC15. Switching regulator IC15 will supply 6.5 volts DC with an input voltage ranging from 4-6 volts DC.

BATTERY

J404 1

PWRSWIN

1/2 IC17

Si9947

Figure 4.

F202

500ma

MMDB301L

Fuse protection modification on newer re vision boards

R23

To Drain of Q2 and

R18 junction

8.2V

PMLL5237B

R13

100K

R12 511

R25

C24

VBATT

1/2 IC17 Si9947

Q9 2N7002

To IC15 and VDCIN

The VDD supply is regulated by IC10, a low drop-out voltage regulator. A DC-DC converter IC16, develops the -VA supply from the VDD supply, this is required by the operational amplifiers used in the system. The LED power (LEDSRC) is regulated and current limited by IC11, fuse F201 protects against over-current.

Voltage Reference

A positive reference voltage VREF2.5 is developed by IC9 (see page 1 on schematic), the +2.5 volts DC is derived from the +VA supply. A negative reference voltage is developed by IC13a (pin1) by inverting the +2.5 volt supply. This negative reference is -VREF at TP6. The analog to digital converter IC5 uses the VREF2.5, the -VREF is used by the digital to analog converter IC12. On revision 01 boards an alternate combination of R63 (3.92K) and D8 (LM4040 - 2.5V) may be substituted for IC9.

Sensor LED Drive Circuits

The drive circuitry differs between revisions 00, 01 and 02 on the 2710 board. Check the revision of the board to determine the appropriate circuitry for the unit.

18-Jul-94 Model 511 Service Manual

7.1.2

7.1.3

Page 24

Section 7 Electronic Theory of Operation

The drive circuitry for earlier revision 00 boards is shown below. The diagram and description that follow explains the drive circuitry for the earlier boards. The diagram below lists the components for the red LED drive circuitry, only a portion of the circuitry is shown, refer to the schematic for components not shown. The corresponding components for the infrared channel are listed in [ ].

IRLED*

[RDLED*]

IC7a pin 1

[IC7b pin 7]

LEDSRC

IC14

[IC18]

5, 6 7, 8

LED1SK

[LED2SK]

[Q6]

R63*

[R64]*

*May not be installed

Figure 5.

Revision 00 LED drive circuitry

R62

[R65]

C27

[C29]

When the RDLED* signal goes low (logic 0), Q3 turns off and the VLED signal is divided down by R42 and R41, at IC7a (pin 3). The N-channel portion of IC14 is driven by IC7a pin 1, this will bias Q1 on when high, current will flow through the red LED in the sensor, then through Q1 and R29 to ground (the P-channel portion of IC14 is not biased on).

When RDLED* returns high (logic 1), Q3 is biased on, forcing IC7a pin3 to ground potential, this results in 0 volts at the output of IC7a (pin 1). The N-channel portion of IC14 is biased off, therefore biasing Q1 off, and as a result, the Red LED in the sensor is also off.

The Infrared LED drive circuit operates in the same manner as the Red LED drive discussed above. The IRLED* signal activates Q4 which controls IC7b, this in turn controls IC18. The source of the N-channel FET of IC18 will bias Q6 either on or off controlling the Infrared LED of the sensor.

Model 511 Service Man ual 6116-90-00

Page 25

2710 Analog Board

IRLED*

[RDLED*]

IC7a pin 1

[IC7b pin 7]

1/2 IC14*

Q7 [Q8]

R62

[R54]

LEDSRC

LED1SK

[LED2SK]

Si9947

2N7002

R33

[R30]

R32

[R31]

C28

[C30]

ADCRDLED

Q1 [Q6]

C27

[C29]

to R29 [R28]

T3904

*not installed

Revision 01 boards drive circuitry is described below. Refer to the sc hematic for components not shown in the diagram, only the differences are displayed below. The infra-red channel components are listed in [ ].

Figure 6.

Revision 01 board drive circuitry

The VLED line voltage is derived from IC13b pin 7 which is controlled by the Digital to Analog Converter IC12. (See sheet 1 of 2 on schematic.) When the DACWR* line is brought Low IC12 is enabled. The data on lines D0-D7 now control the output voltage of IC13b pin 7(VLED) based on the -VREF voltage from IC13a pin 1 (TP6).

When the RDLED* signal goes low (logic 0), Q3 turns off and the VLED signal is divided down by R42 and R41, at IC7a (pin 3). FET Q7 is in turn driven on by IC7a (pin 1). This will bias Q1 on and current will flow through the red LED in the sensor, then through Q1 and R29 to ground.

When RDLED* returns high (logic 1), Q3 is biased on, forcing IC7a pin3 to ground potential, this results in 0 volts at the output of IC7a (pin 1). FET Q7 is biased off, therefore biasing Q1 off, and as a result, the Red LED in the sensor is also off.

The Infrared LED drive circuit operates in the same manner as the Red LED drive discussed above. The IRLED* signal activates Q4 which controls IC7b, this in turn controls Q8. The source of Q8 will bias Q6 either on or off controlling the Infrared LED of the sensor.

The drive circuitry for later revision 02 boards is shown below. The drive is simi lar except that the bipolar transistor are not installed, a different operational amplifier

18-Jul-94 Model 511 Service Manual

is used, and discrete MOSFETS are used in place of the dual package used in earlier

2. On certain units pin 13 of IC12 will have a separate wire connected to J402 pin 9. This is to allow a revision 00 analog board to operate with a revision 01 digital board.

Page 26

Section 7 Electronic Theory of Operation

revisions. The differences between the drive circuitry are displayed below, refer to the schematic to view components not shown below.

IRLED*

[RDLED*]

IC7a pin 1

[IC7b pin 7]

R66

[R67]

215

to R29 [R28]

4 [2]

R62 [R54] 100K

*not installed

LEDSRC

3 [1]

1/2 Q7*

Si9947

5, 6 [7, 8] 5, 6 [7,8]

1/2 Q6 Si9955

[R31]

R32

LED1SK

[LED2SK]

R33

[R30]

ADCRDLED

C28

[C30]

Figure 7.

Revision 02 LED drive circuitry

When the RDLED* signal goes low (logic 0), Q3 turns off and the VLED signal is divided down by R42 and R41, at IC7a (pin 3). FET Q6 (pins 3, 4, 5, 6) is in turn driven on by IC7a (pin 1). Current will flow through the red LED in the sensor, through Q6, then through R29 to ground.

When RDLED* returns high (logic 1), Q3 is biased on, forcing IC7a pin3 to ground potential, this results in 0 volts at the output of IC7a (pin 1). FET Q6 is biased off, and as a result, the Red LED in the sensor is also off.

The Infrared LED drive circuit operates in the same manner as the Red LED drive discussed above. The IRLED* signal activates Q4 which controls IC7b, this in turn controls Q6 (pins 1, 2, 7, 8). The source of Q6 will control the Infrared LED of the sensor.

Sensor Photodio de Return Path

7.1.4

Light, from the sensor’s Red or Infrared LED, shines through the pulsating vascular bed (the patient’s finger, toe, etc.) placed between the LEDs and the photodiode. Some of this light emerges from the tissue and impinges on the photodiode, causing the photodiode to conduct current. IC4b pins 5-7 is set up as a differential amplifier that converts this input current to a voltage at the amplifier output. The sensors are wired such that photodiode current produces a positive voltage at IC4b pin 73.

The voltage at IC4b pin 7 is presented to an analog switch IC3b pin 6. This switch is controlled at pin8 by INSIG* (Input Signal), and will be closed (IC3b pins 6 and 7 connected) except if the monitor is in a Probe Off Patient condition or is

3. The Model 511 uses SuperBright™ sensors (part number 87xx series). If a non-SuperBright™ (Novametrix part number 86xx series) sensor is connected, IC4b pin 7 will go negative.

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2710 Analog Board

undergoing its Self-Test at system power up. The switch IC3c pins 9-11, controlled from SIGND* (Signal Ground) will be open (no connection between IC3c pins10 and 11) except as noted above for the switch at IC3b pins 6-8. As a result, the IC4b pin 7 voltage passes undisturbed to the high pass filter consisting of R53 and C5.

The ASAMP* signal is active whenever either sensor LED is turned on. This causes Q5 to turn off and the charge at C5 passes through to IC4a pin 3. The ASAMP* line returns to a logic high when neither LED is being dr iven, causing Q5 to turn on. With Q5 conducting, any charge at C5 is discharged to ground and the next pulse will charge C5 from a known level. If it were not for Q5, any charge remaining on C5 from the previous pulse or from ambient light reaching the photodiode would be added to the charge from a new pulse—creating measurement errors.

If the signal at IC4a pin 1 is the product of the Red LED being turned on, then RDSAMP* will go low and close the switch at IC3a pins 2-3, thereby presenting the signal to a sample and hold circuit consisting of R17 and C8 (that mainta ins the signal until next sample pulse arrives), a gain stage, (IC2b), a filte r/divider network (C7, R14 and R55), and finally, to the Red channel Analog-to-Digital Convertor (ADC) IC8.

If the signal at IC4a pin 1 is the product of the Infrared LED being turned on, then IRSAMP* will go low and close the switch at IC3d pins 14-15, thereby presenting the signal to a sample and hold circuit consisting of R6 and C4 (that maintains the signal until next sample pulse arrives), a gain stage, (IC2b), a filter/divide r network (C3, R3 and R54), and finally, to the Infrared channel Analog-to-Digital Convertor IC1.

Calibrating the 20-Bit Analog-to-Digital Convertors

7.1.5

The 20-bit ADCs are calibrated as part of the system self-t est which occurs each time the monitor is turned on. At power up, the microprocessor sets the CAL line high. The System Calibrations input SC1 is set high. The CS5503 ADC will not operate while the CAL line is high. On th e falling edge of the CAL signal, the ADC will initiate a calibration cycle determined by the state of the SC1.

The high at SC1 causes INSIG* to go high and reset SIGND* to a logic low. The high INSIG* opens the switch at IC3b pin8 so that IC3b pins 6 and 7 are no longer connected—disconnecting the returning photodiode signal from the rest of the circuitry. The low SIGND* signal closes the switch at IC3c pin9 and as a result, the input to the C5-R53 high pass filter (and thus the entire ADC input circuitry) is brought to ground potential.

The CAL line (which went high at power up) is reset low and ADCs IC1 and IC8 begin their calibration cycles. Because the analog input circuitry is grounded via SIGND*, only circuit offset voltages can be present at the (pin 9 AIN) inputs. The calibration cycle sets the ADC “zero” point to equal this voltage, thus compensating

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Section 7 Electronic Theory of Operation

for any circuitry offsets. The ADC then sets its “full scale” point to equal the voltage at its VREF (pin 10) input. This completes the calibration cycle.

The ADC can now start sampling its input and converting it to a 20-bit digital word. The processor resets SC1 to a logic low, causing IC3c pin9 to open and IC3b pin8 to close. The photodiode signal can now reach the ADCs. See Sensor Photodiode Return Path on page 14.

20-Bit Analog-to-Digital Conversion

7.1.6

Data from the Red and Infrared channels is sampled by the 20-bit measurement ADCs, IC1 and IC8 respectively. The analog input at pin 9 is converted to a digital representation with 20-bit resolution based on the input magnitude.

The CS5503 convertor continuously samples its input, converts the value to a digital word, puts the word in its output buffer (overwriting previous buffer contents), then repeats the process by again sampling its input. The frequency of the sample/convert/overwrite-buffer sequence is based on the 3.2768 MHz clock signal at the ADC pin 3 (ADCCLK) input.

The microprocessor starts a read cycle of the Infrared channel by bringing IC1 pin 16 (Chip Select Channel 1) low. A Red channel read starts when IC8 pin 16 (Chip Select Channel 2) is brought low.

On the falling edge of the ADC’s CS*, the output word’s MSB (most significant bit) appears at the pin-20 SDATA (Serial Data) output. The SDATA line connects directly to the microprocessor’s serial input (RXS) pin. The remaining bits (in descending order) are output from SDATA with subsequent falling edges of the Serial Clock (SCLK) input at pin 19. The SDATA output automatically goes to a 3state (high impedance) condition after completing a word transmission, thus freeing the data line for other uses (i.e., the other ADC channel).

The Serial Clock speed is controlled through the digital board. This clock rate is significantly slower than the ADC sampling rate. As a result, the ADC rewrites its output buffer with new information at a faster rate than the data can be read from the buffer. No conflict occurs, however, because while CS* is low (during the read cycle), the ADC does not update its output buffer—the current word is not overwritten. After the processor receives the entire word, it allows the convertor’s CS* to return high, and the ADC resumes its sample/convert/overwrite-buffer cycle.

Sensor Status Decoding and Conversion

The microprocessor monitors several sensor parameters in addition to the Red and Infrared data channels. It monitors the status parameters, as well as the voltage of the monitor’s internal battery.

Model 511 Service Man ual 6116-90-00

7.1.7

Page 29

2710 Analog Board

The 8-to-1 multiplexor, IC6, decodes the A0MUX-A2MUX input address lines and connects one of eight status paramet er inputs to the multip lexor output at IC6 pin 3. Resistor R38 and diode D5 prevent negative voltages from reaching the input t o the analog-to-digital convertor, IC5.

IC5 is an 8-bit analog-to-digital convertor with a serial data output. While the IC5 Chip Select (ADC3CS*) input is high, the CLK input and ADC3DOUT output are in 3-state mode. When CS is brought low (under processor control), the most significant bit (D7) of the PREVIOUS data conversion becomes available at the ADC3DOUT pin. The remaining bits (D6-D0) are shifted out on subsequent falling edges of the CLK input. On the clock pulse following the one that shifts out the least significant bit (D0), the CLK and ADC3DOUT lines are returned to 3-state and the ADC performs a new conversion based on the input it receives from the IC6 channel selected by the A0MUX-A2MUX input address lines.

The ADC sample/convert/store-result cycle is based on internal chip timing and not the CLK input which (along with CS) only controls serial data output. Thus the CS line is free to return high once the ADC cycle begins.

Sensor Status Parameters

7.1.8

The sensor (and battery) status parameters input to the multiplexor IC6 are described below.

ADCVRD: This signal is not used as of this writing. ADCVIR: This signal is not used as of this writing. ADCFEDC: Photodiode DC Level.

Resistors R19, R20 and capacitor C13 form a voltage divider and low pass filter that provide a measure of the mean DC level at the output of the photodiode current-tovoltage amplifier IC4b pin 7. This signal is used in determining ambient light interference. If this line is examined while the sensor’s Red and Infrared LEDs are turned off, then any DC level at IC4b pin 7 must be the result of ambient light impinging on the photodiode. If the DC shift is in excess of limits set in the software, a Light Interference message appears on the monitor’s display.

ADCLPWR: Sensor LED Supply Voltage. This channel, at IC6 pin 12, monitors the sensor LED supply voltage through a voltage divider consisting of R26 and R27. If a fault occurs that causes the LED supply fuse F2 01 to blow, or if the sensor wires are shorted, this channel reports the condition and the monitor will indicate an error condition.

ADCIRLED: Infrared LED Cathode Voltage. A low pass filter consisting of R30, R31 and C30 provides a means to measure the cathode voltage of the sensor’s Infrared LED. If the channel at IC6 pin 5 is sampled the monitor can determine if the LED is open circuit (zero volts at IC6 pin 5) or operational (approximately 2.5 volts at IC6 pin 5).

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Section 7 Electronic Theory of Operation

ADCBATT: Battery Supply Voltage The monitor’s battery voltage is divided down by R15 and R16. The voltage at IC6 pin 2 is monitored and if its magnitude is l ess than a predet ermined value (encoded in the software) the monitor indicates a low battery warning.

ADCRDLED: Red LED Cathode Voltage. A low pass filter consisting of R33, R32, and C28 provides a means to measure the cathode voltage of the sensor’s Red LED. If the channel at IC6 pin 4 is sampled the monitor can determine if the LED is open circuit (zero volts at IC6 pin 4) or operational (approximately 2.5 volts at IC6 pin 4).

2711 Digital Board

The microprocessor, memory, display driver, and supportive digital circuitry is all contained in the 2711 digital board. Mounted on the digital board is the Liquid Crystal Display (LCD), the Keypanel connects to the 2711 board at J405.

Microprocessor and Memory

The Model 511 is controlled by IC1, an 8 bit microprocessor running at 6.14 MHz. Crystal Y1 controls the operating frequency, system address lines are labelled as A0-A17, system data lines are labelled D0-D7.

The system program is contained in IC3 a 27C512 EPROM (or 27C101), when both RD* and ROMCS* are low a read operation is performed on IC3. The ROMCS* line is controlled by the ME* line (Memory Enable) and address line A17. When both the ME* line and address line A17 are low the ROMCS* line will go low (IC9 pin 6), this enables IC3.

System RAM is contained in IC2. When both the RD* and RAMCS* lines are brought low a read operation is performed on IC2. With both WR* and RAMCS* low a write operation will be performed. The RAMCS* line is controlled by the ME* (Memory Enable) line and address line A17. When address line A17 is brought high, and the ME* line brought low, IC9 pin 3 will go low activating the RAMCS* line.

7.2

7.2.1

For revision 00 boards the operation is as follows: System RAM is contained in IC2. When both the RD* and PRAMCS* lines are brought low a read operation is performed on IC2. With both WR* and PRAMCS* low a write operation will be performed. The PRAMCS* line is controlled by the ME* (Memory Enable) line and address line A17. When address line A17 is brought high, and the ME* line brought low, IC9 pin 3 will go low. This will bias Q3 on and the PRAMCS* will be brought low enabling the chip select of IC2. The purpose of Q3 is to isolate the

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Page 31

2711 Digital Board

PRAMCS* line from VDD when power is turned on or off, this will avoid spurious oscillations from inadvertently enabling the chip.

Decoding

IC9 74HC32

Figure 8.

VDD

R26 100

2N7002

Revision 00 PRAMCS* configuration

VBACK

R27 100K

PRAMCS*

7.2.2

A three to eight line decoder IC11, is used f or decoding va rious write, e nable, and interrupt lines for the system. Address lines A4, A5, A6, and A7 will enable one of the Q outputs of IC11. The table below lists the lines that are controlled by IC11, the WR*, DISPLED, and PWRSWIN lines.

Name Function

DACCS* [DACWR* for rev 00 boards] Digital to Analog Controller Write

RTCCS* Real Time Clock Chip Select

DISPWR* Display Write

DISPCS* Display Chip Select

SPCS3* Serial Printer Chip Select #3

INT1* Interrupt #1

Table 1.

This line will enable writing to IC12 on th e 2710 Analog board.

This line corr esponds to t he Q1 output of IC11 and is used for the optional printer for time stamping on printouts.

When both the processor’s WR* line and the DISPCS* line from IC11 are low the DISPWR* line will initiate a write to the display controller IC4.

This line enables the display controller IC4 for writing.

This line is sent to the printer o ption and corresponds to the Q3 output of IC11.

This interrupt line is controlled by the INTCS* line from IC11 and the DISPLED line. The DISPLED line will be brought low when the front panel key is pressed. This activates the backlight on the display.

2711 digital board decoding lines

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Section 7 Electronic Theory of Operation

Name Function

PWRNMI* Power Non-Maskable Interrupt

PORT1WR Port #1 Write

PORT2WR Port #2 Write

SPCS7* Serial Printer Chip Select #7

Table 1.

Microprocessor Supervisor

This line turns the monitor off. When the PWRSWIN line is brought high (by pressing the front panel POWER key) and the INTCS* line is low, the PWRNMI line will signal the processor to shut off.

This line is controlled by the WR* line of the processor and the PORT1CS* line from IC11. It enables writing to IC12, this controls the multiplexor lines, SC1 and CAL lines for the 20 bit A/D Converters, nad control lines for IC7.

Controlled by the WR* line and PORT2CS* from IC11. This line will enable writing to IC14. The SPOUT lines (for serial printer), 20 bit A/D converter sleep line, backlight control, and power off control are handled by IC14.

This line is sent to the printer o ption and corresponds to the Q7 output of IC11.

2711 digital board decoding lines

7.2.3

A microprocessor supervisory integrated circuit, IC5 monitors the power supply, and shuts the monitor off when the front panel power key is pressed. When the PWROFF line is brought high (under control of the processor) Q1 will be biased on. The PFI input of IC5 will in turn be brought low, this will cause the PWRO FF* line to go low. The PWROFF* line will shut the monitor off by biasing Q2 (located on the 2710 Analog Board) on, this in turn shuts the power off on the monitor, see Section 7.1.1, P ower Supply, on page 9. The MRIN* (Manual Reset In) line enables an external device to reset the system if brought low, this line enters the system at J2 pin 15 (see page 2).

The WDOG line under control of the processor must be toggled before a specific time-out (1.6 seconds) otherwise the RESET* line is brought low, this will result in the system resetting. Therefore the processor toggles the WDOG line pe riodically to avoid the reset, this ensures that the processor is working and not lost in a loop or task. If the VDD supply drops below a certain level the RESET* line will also be brought low to reset the system.

For revision 00 boards: The microprocessor’s supervisor (or watchdog) is made up of IC5 and IC6. The battery voltage is converted to a 2.5 volt reference by IC6, this is used as the backup supply when the monitor is off. When the monitor is powered on and VDD is at +5 VDC the VBACK supply is taken from VDD, when the

Model 511 Service Man ual 6116-90-00

Page 33

2711 Digital Board

VBATT

0.1u

IC6 MAX872

2.5V REF

0.1u

VDD VDD

VBACK

0.1u

IC5 MAX690A

VDD

1 2 VIN 3

4 GND

VOUT 6

COMP 8

IC10 74HC14

R6 10K

R1 1M

C2 10u16V

Q1 2N7002

R3 100K

R2 100K

PWROFF

1 VOUT 2 VCC

3 GND 4 PFI PFO 5

WDI 6

RST* 7

VBAT 8

MPU Supervisor

SOIC - 8

1011

RESET

RESET*

WDOG

PWROFF*

monitor is off the VBACK supply is taken from VBAT (the 2.5 volt reference), this switching is controlled by IC5.

18-Jul-94 Model 511 Service Manual

Figure 9.

Revision 00 watchdog circuitry

When the PWROFF line is brought high (under control of the processor) Q1 will be biased on. The PFI input of IC5 will in turn be brought low, this will cause the PWROFF* line to go low. The PWROFF* line will shut the monitor off by biasing Q2 (located on the 2710 Analog Board) on, this in turn shuts the pow er off on the monitor, see Section 7.1.1, Power Supply, on page 9.

Front End Timing Signals

A 14 stage divider IC6 (IC15 on rev 00 boards), acts as a timing sequencer. The ADCCLK input is the clock input, the RESET line is the clear input, used for clearing the chip at power up. The Q4-Q11 outputs of IC6 are divided down from the clock input and feed IC13, the data sampling controller. The Q14 output of IC6 is used as an interrupt that is generated every 5 milliseconds (INT5MS).

The data sampling controller IC13 is a Programmable Electrically Erasable Logic device (PEEL). The PEEL uses the outputs from IC6 (IC15 on rev 00 boards) and

7.2.4

Page 34

Section 7 Electronic Theory of Operation

generates the front end timing signals. These signals control the sensor LED drive and the photodiode’s return path circuitry during normal operation and calibration.

The RESET and SC1 lines control when the outputs of IC13 are active, both these lines must be low in order for IC13 to operate normally. The RESET line controls IC13 during power up, while the SC1 line is under processor control and will toggle when a probe off patient alert exists and during the power up self test.

Signal Description

INSIG* Input Signal

RDLED* Red LED

IRLED* Infrared LED

SIGND* Signal Ground

ASAMP* Analog Sample

SYNC Synchronization

IRSAMP* Infrared Sampling

RDSAMP* Red Sampling

This line will enable signals from the photod iode, or prevent signals from the photodiode from reaching the detection circuitry.

Controls the signals for the Red Led in the sensor.

Controls the signals for the Infrared Led in the sensor.

This is used to short out the inputs of the detection circuitry so that the system can compensate for offsets.

This line is used to short out the capacitor used in the sample and hold circuitry to avoid having residual charge interfere with data sampling.

Synchronization signal, not used in this system.

Used for sampling the Infrared signal response from the photodiode.

Used for sampling the Red signal response from the photodiode.

Table 2.

Front end timing signals

System Output Ports

There are two output port chips IC12 and IC14, these control various lines for system control. The first port IC12, enabled when PORT1WR is high controls the CSIO PEEL IC7, the analog multiplexor IC6 on the 2710 board, and the 20 bit analog to digital converters IC1 and IC8 on the 2710 board. The second port IC14, enabled by the PORT2WR line, handles the serial printer control lines ADCSLP*, SPOUT1-SPOUT3, the DISPBLK* and BKLITE lines that control the display. The second port also controls turning the monitor off through the PWROFF line.

Model 511 Service Man ual 6116-90-00

7.2.5

Page 35

2711 Digital Board

The output ports are selected by the decoding performed by IC11 and the WR* line. The signals controlled by the ports are listed below with a brief description of their function.

Signal Description

AA0-AA1 Decode line for selecting ADCs. SC1 Used for 20 bit ADC calibration. CAL De-activates the 20 bit ADCs prior to calibration. A0MUX-A1MUX Selects one of six channels that will be switched to the

serial A/D converter for conversion. NEXT* Used in decodi ng selection of ADCs. ADCSLP* Signal used for the serial printer. BKLITE Controls the backlight for the LCD display. PWROFF Turns the monitor off, under processor control. DISPBLK* Blanks out the display by de-activatin g IC4. SPOUT1-SPOUT3 Used for the serial printer option.

Table 3.

Serial I/O Controll e r

Output port lines

7.2.6

Digital data from the three Analog-To-Digital Convertors is read by the CPU through its clocked serial data input (RXS) at IC1 pin 56. The PEEL IC7 acts as the Clocked Serial Input/Output (CSI/O) Controller.

Except during power up or Watchdog Timer reset, IC6 (IC15 on rev 00 boards) pin 3 provides an interrupt to the CSI/O controller in the form of a 5 millisecond period square-wave input to IC7 pin 7 (INT5MS).

On the rising edge of INT5MS, a CPU interrupt request is generated when IC7 pin 18 (CPUINIT*) goes low. The CPU responds by sending the clock input to CSI/O controller (CKS) at IC7 pin 6 low. (This CKS line is inactive high unless a serial receive operation is in progress.) The CPU also sets up the ADC decode lines AA1 and AA0 at IC7 pins 5 and 4, and as a result, one of the ADC chip select lines (ADCIRCS*, ADCREDCS*, ADC3CS*) is brought low, and the CPUINIT* line is disabled.

On the rising CKS signal a CLKS output pulse at IC7 pin 14 is sent as a serial clock input to the ADC selected by the decode lines. Decode results are shown below.

AA1 AA0 Decode

0 0 Red LED 20-bit ADC 0 1 Infrared LED 20-bit ADC

Table 4.

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CSI/O decode lines

Page 36

Section 7 Electronic Theory of Operation

AA1 AA0 Decode

1 1 Sensor Status 8-bit AD C 1 0 Internal CSI/O signal (TEND)

Table 4.

CSI/O decode lines

Successive CKS/CLKS pulses cause the ADC data to be shifted out of the ADC (most significant bit first) along the serial data line (SDATA) to the CPU serial input (RXS) at IC1 pin 56.

After receiving the correct number of bits for the ADC being read, the CPU changes the AA1 and AA0 decode lines and exerts the Next line (NEXT*) at IC12 pin 12 low. This restarts the serial data shifting out of the newly selected ADC.

After all three ADCs have been read, the CPU sets the AA1 and AA0 decode lines to exert the internal TEND signal and set the 8-bit ADC to the next channel (so that it has time to settle before the ne xt read of the ADC). This re-enabl es the C PUINIT line. At this point the CSI/O controller is reset awaiting an INT5MS pulse to begin the cycle again.

Display

7.2.7

The display is interfaced to the microprocessor by IC4, a Liquid Crystal Display (LCD) decoder/driver. The DISPWR* line will enable IC4 on its positive going edge. Parallel operation is performed on the address lines A0-A1, and data lines D0D3.

VDISP: Display Voltage Control, when this input i s brought to a lower voltage than one volt from VDD the display will be shut down. This is accomplished when the DISPBLK* line is brought low, Q2 will be biased off and the VDISP line voltage will be close to VDD. When the DISPBLK* line is high then Q2 is on, current will flow through D3-D7 (diodes are used for temperature compensation), through the parallel combination of R9 and R12 then through Q2 to ground. The voltage at VDISP will be about 2 volts and the display will operate.

The backlight for the display is controlled by the BKLITE line (IC14 pin 18). When BKLITE is brought high both Q5 and Q4 (Q6 on the rev 00 boards) will be biased on, this will allow current to flow through DS1 and DS2, the display will light.

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Page 37

Maintenance

General

This section presents recommended maintenance schedules for the Model 511 and information on general maintenance, suc h as ba ttery repl ac ement, disa ssembly a nd assembly instructions, and system software updates.

Maintenance Schedules

The electronic circuits within the Novametrix Model 511 Pulse Oximeter monitor do not require scheduled calibration or service. However, in order to maximize battery life, the monitor’s internal battery should be exercised monthly. Novametrix recommends the following maintenance schedules.

• Cleaning and Sterilization: Perform as required. See

• Battery Installation:

Battery Installation

See

• Functional Test: Perform on each Model 511 and sensor to verify overall functional integrity of the monitor and sensors. See

• Accuracy Test: This test, which requires the use of the Model TB500B Sensor Simulator, verifies the performance accuracy of the Model 511. This test is typically performed in conjunction with (after) the Monitor Functional Test. If the monitor does not pass the accuracy test, the Electronic test should be performed.

Accuracy Test

See

on page 39.

Cleaning and Sterilization

on page 26.

Functional Test

on page 26.

on page 35.

8.1

8.2

• Electronic Tests: These tests contain information on checking the electronic circuits within the Model 511 and should only be performed if the monitor fails to pass the Functional and/or Accuracy Tests. Only qualified service personnel should attempt to perform the Electronic Test. See

1. At the customer’s request, Novametrix will provide repair and calibration services under the terms of a Service Contract. Contact the Novametrix Service Department for contract details.

18-Jul-94 Model 511 Service Manual 25

Electronic Test

on page 43.

Page 38

Section 8 Maintenance

Cleaning and Sterilization

Model 511 Monitor

• Turn the monitor off before cleaning.

• Clean the monitor surface with a damp cloth.

• Do not immerse the monitor.

• Do not attempt to sterilize the monitor.

Finger Sensor

• Clean the sensor surface with a damp cloth.

• Ensure the sensor windows are clean and dry.

• Do not immerse the sensor.

• Do not attempt to sterilize the sensor.

Y-SENSOR™ and Y-STRIP™ Taping System

• The Y-SENSOR may be immersed (up to the connector) in a cold liquid sterilant (i.e., Cidex™). Refer to sterilant manufacturer’s instructions and standard hospital protocol.

8.3.1

8.3.2

8.3.3

8.3

• Rinse thoroughly with water and dry before use.

• Do not immerse Y-SENSOR connector.

• Treat Y-STRIP Taping System in accordance with hospital protocol for single-patient use.

Battery Installation

The Model 511 operates on four (4) 1.5 volt “AA” alkaline batteries. Other battery types should not be used with the monitor.

WARNING: Use of improper batteries may present a risk of fire or explosion.

To install batteries into the monitor:

1. Locate the battery compartment cover on the back side of the monitor.

2. Press the “OPEN” area of the compartment cover, slide the cover in the

direction indicated by the arrow, and remove the cover.

8.4

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Page 39

Battery Installation

OPEN

NOTE: Use only 1.5 volt

“AA” size Alkaline

3. Install new batteries according to the “+” and “-” symbols on the bottom of

the battery compartment and on each battery.

Figure 10.

WARNING: Alkaline batteries may explode or leak if recharged, inserted improperly, or disposed of in a fire. Do not open batteries.

Battery orientation

4. Slide the battery cover back into place. The cover latches into place when

properly seated.

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Page 40

Section 8 Maintenance

Assembly Exchanges

8.5

Disassembly should be performed by qualified personnel. Follow proper grounding procedures to avoid damage to internal components from static discharge.

1. Turn the Model 511 Off. Disconnect the sensor, external DC supply if

connected, and remove the batteries. Remove the four cover screws from the bottom cover. Holding both case halves together, flip the monitor right-side up.

Figure 11.

Removing the top cover

2. Use a gentle rocking motion to separate the left side first, lift the top cover

from the monitor. Be careful of the keypanel ribbon cable, it is attached between the top cover and digital board.

Keypanel ribbon cable

Figure 12.

Model 511 Service Man ual 6116-90-00

Monitor disassembled

Page 41

Assembly Exchanges

3. Carefully disconnect the keypanel ribbon cable from the display board.

Carefully pull the sliding portion of the connector upward, this will release the ribbon cable.

Keypanel ribbon cable

Pull this section upward to release ri bbon cable

J405 on 2711 Digital board

Figure 13.

Disconnecting keypanel ribbon cable.

4. The circuit boards of the monitor can now be removed from the bottom case

assembly. Be careful not to damage the speaker or battery wires.

5. Remove/replace the various assemblies as needed.

IMPORTANT:

The monitor will be damaged if power is applied to it while cables or assemblies are improperly connected.

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Page 42

Section 8 Maintenance

Changing System Software

8.6

The system software is contained in EPROM IC3 on the 2711 Digital Board. New software releases are made available from time-to-time. These new releases may add features or be maintenance upgrades. To install a new EPROM:

1. Follow the steps listed in Assembly Exchanges on page 28 to open the monitor. Be sure that the external DC supply is disconnected, and batteries are removed from the unit before disassembly.

2. Use a small flat-blade screwdriver (or IC extraction tool) to pry the EPROM IC3 from the socket—be careful not to bend the pins.

EPROM IC3

Pin 1

Figure 14.

Changing the system software EPROM

3. Install the new EPROM into the socket. Align the EPROM so that IC3 pin-1 is properly aligned with the socket.

4. Reassemble the monitor.

Model 511 Service Man ual 6116-90-00

Page 43

The information listed below c onstitute the various fault, ale rt, and status mes sages that can be indicated by the Model 511 display.

Status Messages

Status Messages and Fault Indicators

The Model 511 Pulse Oximeter can indicate messages as text in conjunction with numerical codes on the display. This combination will correspond to specific conditions that are explained in the following table.

SpO2 Value

or upper alert limit

UNIT/SENSOR ERROR REPOSITION SENSOR SENSOR OFF PATIENT SENSOR DISCONNECT

Pulse Bar

Text Status Messages

(only one will appear at a time except at power up)

Numerical code will appear in some cases (see table)

Battery Indica tor

Numerical Indicator

Pulse Rate or lower alert limit

Audible Alert

Indicator

9.1

Figure 15. Status messages and numerical codes

18-Jul-94 Model 511 Service Manual 31

Page 44

Section 9 Status Messages

Text Message

Sensor Disconnect 1 Sensor Off Patient 2 Reposition Sensor 3

Reposition Sensor 4

Reposition Sensor 5

Reposition Sensor 6

Unit/Sensor Error 7

Unit/Sensor Error 8

Numerical

Indicator

Explanation

Sensor not connected to monitor. Sensor not applied to the patient. Low signal strength. Pulse strength as detected by

the sensor is too small for proper monitor operation.

Insufficient light. Sensor placed on a site too thick (or opaque) for adequate light transmission.

Pulse out of range. Pulse must be 30-250 bpm inclusive.

Light Interference. Ambient light sources (sunlight, warming lights, etc) are interfering with sensor operation. Shield sensor from these light sources.

Sensor fault. Remove sensor from use and contact qualified service personnel.

Monitor fault. Record the error number that appears in the monitor from use and contact qualified service personnel.

PULSE RATE

display. Remove the

Reposition Sensor 9

Table 5. Status messages

Bad signal time-out. Monitor not receiving valid signals from sensor, reposition sensor.

All status conditions except for Unit /Sen sor Error will rese t au toma tical ly onc e the condition is corrected. Unit/Sensor Error conditions are latching conditions—that is you must replace the sensor for a sensor fa ult, or turn the Mode l 511 off and fix the problem before the monitor fault is reset.

If the Unit/Sensor Error message appears and status triangle numerical indicator is 8, then another numerical code will be displayed in the

PULSE RATE

display. The

numerical codes with the error detected is listed below.

PULSE RATE

Numerical Code

1 RAM Self Test Failed

3 ROM Self Test Failed 10 Stack pointer error-not at top of stack 11 MMU error-not at base page 12 250 ms interrupt-illegal task

Explanation

Table 6. Error codes

Model 511 Service Man ual 6116-90-00

Page 45

Status Messages and Fault Indicators

PULSE RATE

Numerical Code

13 Stack error-stack overflow 14 Display buffer overflow 15 Front end offset error 20 10 ms overrun 21 250 ms overrun 22 illegal int1 interrupt 23 illegal int2 interrupt 24 illegal prt1 interrupt 25 illegal dma0 interrupt 26 illegal asc0 interrupt 27 illegal nmi interrupt 28 Trap error-illegal command executed 40 Unknown error

Table 6. Error codes

Explanation

18-Jul-94 Model 511 Service Manual

Page 46

Section 9 Status Messages

[This page intentionally blank]

Model 511 Service Man ual 6116-90-00

Page 47

POWER key

Audible Alert

Display

SpO

beats/min

SATURATION PULSE RATE

511

Pulse Oximeter

Enable/Disable

Functional Test

Introduction

The Functional Test described below should be performed on each Model 511 Pulse Oximeter and sensor to verify overall functional integrity of the monitor and sensors. If the monitor or sensors do not pass these tests, remove from use and contact the Novametrix Service Department for repair/replacement assistance.

Monitor Functional Test

1. Equipment Required: Model 511 to be tested (with fully charged batteries) Finger Sensor (Cat. No. 8744) or Y-Sensor™ (Cat. No. 8793)

2. Check that the sensor is not connected to the monitor. Press and hold the key on the front panel until the display backlight illuminates, verify the monitor powers up; all segments should activate, then the display should show

SENSOR DISCONNECT

PULSE RATE displays should be blanked.

and the number 1 will flash, both SATURATION and

10.1

10.2

18-Jul-94 Model 511 Service Manual 35

Figure 16.

Front panel

Page 48

Section 10 Functional Test

3. Connect the sensor, verify

SENSOR OFF PATIENT

and the number 2 flashes. If using the Y-Sensor, position the sensor heads so that they face each other (the red light shines at the detector).

SpO

SENSOR OFF PATIENT

Figure 17.

Sensor off patient display

Battery level indicator

(may vary depending upon battery life)

Pulse Rate

Status number

will flash

4. Apply the sensor, check for a Pulse Bar to the left of the display. Verify that Saturation and Pulse rate values appear. If using the finger sensor apply to index finger. If using Y-Sensor apply using tape.

Finger sensor

Y-sensor with tape

Figure 18.

Applying sensor for functional test

5. Remove the sensor, verify the display blanks (Pulse and Saturation values are replaced by “-”). Check that

SENSOR OFF PATIENT

appears and the number 2 flashes. NOTE:

REPOSITION SENSOR

will appear if using the Y-sensor and the sensor

heads are not facing eachother.

36 Model 511 Service Manual 6116-90-00

Page 49

Monitor Functional Test

6. Verify an alert tone sounds, press the key and check that the alert tone is silenced and the audible alert disabled triangle appears on the display.

Message

SENSOR OFF PATIENT

Figure 19.

Sensor off patient display

Displa y Bl ank s

Audible Alert

Disabled Triangle

Status Number

7. Reapply the sensor, verify that the SpO2 and pulse rate displays return along with the pulse bar.

8. Press the Audible Alert Disable key, verify that the audible alert triangle disappears. The current SpO2 limits will appear for three seconds. The high

limit will appear in the

RATE

display. Verify the alert message and status number disappear.

SATURATION

display, the low limit in the

PULSE

NOTE: The Saturation value must be within the limits in order to cancel all the alerts.

9. Turn the monitor off by pressing the key. This completes the Functional Tests for the Model 511 and sensor. If the monitor and sensor performed as described above they are functionally operational.

18-Jul-94 Model 511 Service Manual

Page 50

Section 10 Functional Test

[This page intentionally blank.]

38 Model 511 Service Manual 6116-90-00

Page 51

Accuracy Test

Introduction

The Accuracy Test verifies the performance accuracy of the Model 511 Pulse Oximeter monitor. This test is typically performed in conjunction with (after) the tests described in Section 10, pass the accuracy test, the monitor should be recalibrated. Refer to Section 12,

Electronic Test

repair/replacement assistance. The test requires the use of the Model TB500B Sensor Simulator.1 This is the same

device used by the factory technicians to calibrate the monitor prior to shipping. The TB500B is an updated version of the TB500A Test Box. Owners of TB500A should contact the Novametrix Service Department for details on upgrading to the TB500B. Note that the TB500A, used in conjunction with the Cat. No. 5453-00 Adapter Cable2, may be substituted for the TB500B in most parts of this test.

, on page 43, or contact the Novametrix Service Department for

Functional Test

, on page 35. If the monitor does not

Monitor Accuracy Test

1. Equipment Required: Model 511 to be tested Model TB500B Sensor Simulator (Cat. No. 5330-00) Sensor Adapter Cable (Cat. No. 5977-00) Finger Sensor (Cat No 8744) or Y-Sensor (Cat No 8793)

11.1

11.2

2. Ensure that the batteries have sufficient charge to power the monitor. The combined voltage under load should be between 4-6 volts DC.

1. Available through the Novametrix Service Department.

2. The 5453-00 adapter cable must be used in conjunction with the 5977-00 adapter cable if using the TB500A.

18-Jul-94 Model 511 Service Manual 39

Page 52

Section 11 Accuracy Test

3. Turn the Model 511 on by pressing the key. Verify proper display power up sequence. See Power On/Off on page 7.

UNIT/SENSOR ERROR REPOSITION SENSOR SENSOR OFF PATIENT SENSOR DISCONNECT

Figure 20.

LCD display with all segments on

4. Connect the TB500B Sensor Simulator to the Model 511 sensor input cable using the 5977-00 adapter cable. Set the sensor simulator

1. Verify

SENSOR OFF PATIENT

and 2 appears on the display.

ATTENUATION

5. Verify the Saturation values listed in the table below;

Simulator Settings

TB500B

Sat. Value

TB500A w/Adapt.

Cable Sat. ValueSat. Setting Atten.

100 3 98-100 98-100

92 3 90-94 90-94 82 3 80-84 82-86 72 3 70-74 75-79 62 3 60-64 67-71 72 7 68-76 73-81 82 7 78-86 80-88 92 7 88-96 88-96

100 7 98-100 98-100

Table 7.

Saturation values using sensor simulator

6. Verify the Pulse Rate is 60 bpm ± 1.

7. Set

SATURATION

to 0. Verify

REPOSITION SENSOR

and 3 appears on the

display.

8. Press and hold the

RED

button on the TB500B. Check for

UNIT/SENSOR ERROR

and 7.

9. Disconnect the test box to reset the error. Verify display shows

DISCONNECT

10. Press and hold the

and 1. Reconnect the test box.

INFRARED

button, verify

UNIT/SENSOR ERROR

11. Disconnect the test box to reset the error. Verify display shows

DISCONNECT

Model 511 Service Man ual 6116-90-00

and 1. Reconnect the test box.

SENSOR

and 7.

SENSOR

Page 53

Monitor Accuracy Test

12. Turn the TB500B off, check that the display shows

REPOSITION SENSOR

and 4.

13. Disconnect the Sensor Simulator (the simulator should still be off).

14. Connect the sensor, verify

SENSOR OFF PATIENT

and the number 2 flashes. With the Y-Sensor, position the sensor heads so that they face each other (the red light shines at the detector).

SpO

SENSOR OFF PATIENT

Figure 21.

Alert disp lay

Battery level indicator

(may vary depending upon battery life)

Pulse Rate

Status number

will flash

15. Apply the sensor, check for a Pulse Bar to the left of the display. Verify that Saturation and Pulse rate values appear. If using the finger sensor apply to index finger. If using Y-Sensor apply using tape.

Finger sensor

Y-sensor with tape

Figure 22.

Application of Y-sensor and Finger sensor

16. Remove the sensor, verify the display blanks (Pulse and Saturation values are replaced by “-”). Check that

SENSOR OFF PATIENT

appears and the number 2

flashes.

NOTE

REPOSITION SENSOR

may appear if using the Y-sensor and the sensor

heads are not facing eachother.

17. Turn the Model 511 off by pressing the key. This completes the Accuracy Tests for the Model 511.

18-Jul-94 Model 511 Service Manual

Page 54

Section 11 Accuracy Test

[This page intentionally blank]

Model 511 Service Man ual 6116-90-00

Page 55

Electronic Test

Introduction

The Electronic Test verify the operation of the electronic circuits within the Model

511. These only if the monitor fails to operate as expected and/or fails the page 35. These test should be performed only by qualified service personnel. Follow proper grounding procedures when handling the internal components to avoid damage from static discharge.

If the monitor does not pass the Electronic Tests, remove it from use and contact the Novametrix Service Department for repair/replacement assistance.

This procedure assumes the technician performs each step as indicated - leaving the monitor in a known state prior to performing the next step. If steps are omitted or performed out of order, be sure that the monitor is set to the correct state before continuing.

DO NOT

need to be performed on a regular basis. Perform these test

Functional Test

Monitor Functional Test

12.2.1 Equipment Required:

Model 511 to be tested Finger Sensor (Cat. No. 8744) or Y-Sensor™ (Cat. No. 8793)

Model TB500B Sensor Simulator (Cat. No. 5330-00) Sensor Adapter Cable (Cat. No. 5977-00) External DC power supply Digital Voltage Multimeter Small clip-leads

2.5 mm I.D. X 5.5 mm O.D. X 12 mm (barrel length) DC plug, or optional external DC supply

12.1

12.2

12.2.2 Disconnect the external DC supply if installed, remove the batteries, then

disassemble the monitor to access the internal circuit boards. Carefully separate the boards from each other. See

1. The TB500A used in conjunction with the 5453-00 Adapter Cable can be substituted for the TB500B in most parts of this test . Owners of the TB5 00A should co ntact the Novametrix Serv ice Department for details on upgrading to the TB500B.

18-Jul-94 Model 511 Service Manual 43

Assembly Exchanges

on page 28.

Page 56

Section 12 Electronic Test

2710 Analog Board

12.2.4 Connect VBATT to 5.0 VDC ± 0.1V at J404 using an external power

12.2.3

supply.

12.2.5 Clip VBATT to the positive terminal of C24 on the 2710 Analog board,

this will power the board up (momentarily connecting VBATT to this point will power up the board).

2710 Analog Board

Clip VBATT here to turn the board on

Positive ConnectionNegative Connection

Figure 23.

Cutaway showing location of C24 on the 2710 analog board

12.2.6 Measure and verify the following voltages.

Signal Voltage Test Point

VDCIN 5.0 ± 0.2 VDC C11 positive term. LEDPWR 6.3 ± 0.2 VDC C20 positive term. VDD 5.0 ± 0.2 VDC C12 positive term. +VA 5.0 ± 0.2 VDC C19 positive term.

-VA -5.0 ± 0.3 VDC C21 negative term. LEDSRC 5.2 ± 0.3 VDC C36 positive term. VREF -2.50 ± 0.05 VDC TP6 LEDPWR @

6.3 ± 0.2 VDC C20 positive term.

VBATT=3.3-3.7 VDC LEDPWR @

6.3 ± 0.2 VDC C20 positive term.

VBATT=5.8-6.2 VDC

Table 8.

2711 Digital Board

12.2.8 Set an external DC supply to +5.00 ± 0.05 VDC, turn the supply off before

2710 analog board voltage checks

12.2.7

connecting the digital board.

Model 511 Service Man ual 6116-90-00

Page 57

Monitor Functional Test

12.2.9 Connect the external DC power supply ground to IC3 ground. Connect the

external DC power supply positive to IC3 VDD.

VDD connection

+5 VDC

EPROM IC3

Ground connection

Figure 24.

Connecting external DC supply to the 2711 Digital Board

12.2.10 Turn supply on, verify 5.0 VDC ± 0.1v

12.2.11 Verify proper display power up sequence.

NOTE: once the power up sequence is finished an error message will appear, this is due to the fact that the 2710 Analog Board is not connected.

UNIT/SENSOR ERROR REPOSITION SENSOR SENSOR OFF PATIENT SENSOR DISCONNECT

Figure 25.

12.2.12 Measure the clock frequency on J2 pin 46 (or TP4 if available), verify

2711 Digital board power up display

3.072 MHz ± 3KHz.

System Check

12.2.14 Connect the power connector (from battery compartment and DC input

12.2.13

jack) to J404 on the 2710 Analog Board (the 2711 board should be removed for this).

12.2.15 Connect the Sensor cable’s connector to J403 on the 2710 Analog board

(without sensor attached).

18-Jul-94 Model 511 Service Manual

Page 58

Section 12 Electronic Test

12.2.16 Attach the 2710 and 2711 boards together, be sure to orient the boards

12.2.17 Connect the membrane from the top cover to J405 on the 2711 Digital

together properly. If improperly attached and power is applied damage may occur.

board.

Keypanel ribbon cable

Pull this section up, insert the ribbon cable. Push this section down to secure the cable.

J405 on 2711 Digital board

Figure 26.

12.2.18 Check that pins 2 and 3 on the DC input jack are open when a plug is

Connecting membrane keypanel

inserted (use a dummy jack 2.5 mm I.D. X 5.5 mm O.D. X 12 mm Barrel length, or un-powered supply). This ensures that the batteries are disconnected when the external DC supply is connected. Remove the plug and check that pins 2 and 3 are shorted.

12.2.19 Batteries must not be installed! Connect an external supply set to 5.0 VDC

± 0.1V. Observe proper polarity, hookup the positive lead to the red wire

battery connection, the negative lead to the black wire battery connection. (Ensure the dummy plug or external supply is not connected at this point).

Be sure that the batteries are

not installed!

Positive Lead +5VDC

Negative Lead GND

Figure 27.

Model 511 Service Man ual 6116-90-00

Connecting external DC supply

Page 59

Monitor Functional Test

12.2.20 Turn the external supply on. Turn the model 511 on by pressing and

holding the key until the backlight illuminates.

12.2.21 Verify proper display power up sequence. See Power On/Off on page 7.

UNIT/SENSOR ERROR REPOSITION SENSOR SENSOR OFF PATIENT SENSOR DISCONNECT

Figure 28.

12.2.22 Turn the monitor off by pressing the key, press the key again, verify

Display at power up with all segments active

the monitor powers up without the backlight illuminated.

12.2.23 Attach the sensor simulator to the Sensor cable using the 5977-00 adapter

cable. Turn the simulator on. Set the

SATURATION

12.2.24 Set the sensor simulator

to 100. Verify pulse bar, SpO2 and Pulse rate values.

ATTENUATION

appears and a 2 blinks on the display. Check that the

PULSE RATE

12.2.25 Check that the monitor sounds an alert, press the key and verify that

displays blank out with “-”.

ATTENUATION

to 1. Verify

SENSOR OFF PATIENT

to 3 and the

SATURATION

and

the audio is silenced and the audible alert triangle appears on the display.

12.2.26 Press the key again, verify the alert tone, and the audible alert triangle

disappears. Check that the default alert limits appear: the high limit (100) in the

display.

SATURATION

display, the low limit (85) in the

PULSE RATE

2. The default alert limits are set every time the mo nitor is turned on, if the key is pressed and held, the monitor will beep twice to indicate that the li mits have b een chan ged. If there is n ot valid SpO2 data in which to set new limits the monitor will retain the default limits and beep three times.

18-Jul-94 Model 511 Service Manual

Page 60

Section 12 Electronic Test

12.2.27 Verify the Saturation values listed in the table below (press the key to

12.2.28 Verify the Pulse Rate is 60 bpm ± 1.

disable audible alarms if desired);

Sat. Setting Atten. TB500B Sat. Value TB500A w/Adapt. Cable

Sat. Value

100 3 98-100 98-100

92 3 90-94 90-94 82 3 80-84 82-86 72 3 70-74 75-79 62 3 60-64 67-71 72 7 68-76 73-81 82 7 78-86 80-88 92 7 88-96 88-96

100 7 98-100 98-100

12.2.29 Set the

SATURATION

to 82,

ATTENUATION

to 3, check for the SpO

display to settle between 80-84.

12.2.30 Press and hold the key. Verify new alert limits appear in the SpO

Pulse Rate displays, the monitor will also beep twice.

12.2.31 Set the

SATURATION

to 100, verify H blinks on the display (audible

alarm will sound if not enabled).

12.2.32 Set the

SATURATION

to 62, verify L blinks on the display (audible alarm

will sound if enabled).

12.2.33 Set the

12.2.34 Set

SATURATION

to 82, verify alerts clear.

to 0. Verify

REPOSITION SENSOR

appears and a 3 blinks

on the display.

12.2.35 Press and hold the

ERROR

12.2.36 Disconnect the test box to reset the error. Verify display shows

DISCONNECT

12.2.37 Press and hold the

12.2.38 Disconnect the test box to reset the error. Verify display shows

DISCONNECT

and 7.

and 1. Reconnect the simulator.

RED

button on the TB500B. Check for

INFRARED

button, verify

UNIT/SENSOR ERROR

UNIT/SENSOR

SENSOR

and 7.

SENSOR

and

12.2.39 Turn the TB500B off, check that the display shows

REPOSITION SENSOR

and 4.

12.2.40 Turn the Model 511 of by pressing the key. This completes the

Electronic Tests of the Model 511, re-assemble the monitor. See Assembly Exchanges on page 28.

Model 511 Service Man ual 6116-90-00

Page 61

Specifications

General

Specifications for the Novametrix Model 511 Pulse Oximeter, are listed for informational purposes only, and are subject to change without notice.

Oxygen Saturation (SpO2)

• Range, 0-100%

• Accuracy, 80-100% ± 2%, 0-79% unspecified

(Approximately 68% of the observations are within the accuracy claim.)

• Display Resolution, 1 SpO

• Averaging Time, fixed at 8 seconds

• Settling Time

Display settles to within 1% of the final reading less than 15 seconds after the sensor is properly applied.

Pulse Rate

• Range, 30-250 beats per minute (bpm)

• Accuracy

(Approximately 68% of the observations are within the accuracy claim.)

• Display Resolution, 1 bpm

• Averaging Time, fixed at 8 seconds

• Settling Time

Display settles to within 1% of the final reading less than 15 seconds after the sensor is properly applied.

1% of full scale

, ±

digit

13.1

13.1.1

13.1.2

General Specifications

• Operating Environment

50-104 °F (10-40 °C), 0-90% relative humidity (non-condensing)

• Weight, 13 ounces including batteries (without printer)

•Dimensions

Height 6.25 inches, Width 3.75 inches, Depth 1.3 inches

•Battery

Type, four “AA” alkaline cells. Life, 12 hours.

• Optional External Power Supply

Input: 105-130 VAC, 50/60Hz* or 230 VAC, 50/60Hz** Output: 6 VDC @ 150ma Cord Length: 6 ft *105-130 volt unit designed to meet electrical tests of U. L. 544 Patient Care EquipmentPatient Connected/Isolated **230 volt unit designed to IEC601 Electrical Specification

18-Jul-94 Model 511 Service Manual 49

13.1.3

Page 62

Section 13 Specifications

[This page intentionally blank]

Model 511 Service Man ual 6116-90-00

Page 63

Bottom Cover Top Cover/Keypanel

2710 Analog Board

2711 Digital Board/Display

Cable Assy, SpO2 Input

Panel

Parts Lists

Model 511 Assemblies

The different assemblies and parts that make up the Model 511 are shown below. Assemblies with parts list (part numbers with description) follow. There may be slight differences in assemblies (speaker placement for example).

14.1

18-Jul-94 Model 511 Service Manual 51

Page 64

Section 14 Parts Lists

ASSY: 6116-00 00 PULSE OXIMETER - MODEL 511

LINE

0001 6116-01 00 1 MAIN ASSY, MODEL 511 0002 6116-09 00 0 OVERALL WIRING DIAGRAM, MODEL 511 0003 6116-23 XX 1 USERS MANUAL, MODEL 511 0004 6116-90 XX 1 SERVICE MANUAL, MODEL 511 0005 6070- 32 00 1 LABEL, SERIAL NUMBER 0006 400038 4 BATTERY, 1.5V DC, AA SIZE

PART

REV QPA DESCRIPTION

ASSY: 6116-01 00 MAIN ASSY, MODEL 511

LINE

0001 6102-10 00 2 SUPPORT, PCB, MODEL 510 - SPOT CHECK 0002 6116-04 XX 0 TEST PROCEDURE, MODEL 511 0003 6109-01 00 1 TOP COVER ASSY, MODEL 511 0004 6080-01 00 1 BOTTOM COVER ASSY, MODEL 511 0005 6108-01 00 1 SPO2 MODULE ASSY, MODEL 511 0006 161007 0 SUPERBONDER 414 ADHESIVE 0006 161069 0 ADHESIVE, 401, FAST-SETTING, MEDIUM VISCOSITY

PART

REV QPA DESCRIPTION

ASSY: 6109-01 00 TOP COVER ASSY, MODEL 511

LINE

0001 5923-11 01 1 TOP COVER MODIFICATION 0002 6078-10 00 1 REFLECTOR 0003 6092-27 00 1 MEMBRANE KEYPANEL 0004 161007 0 SUPERBONDER 414 ADHESIVE 0005 161089 0 TAPE, FOAM, .25W X .062T, BLK, PRESS SENS

PART

REV QPA DESCRIPTION

ASSY: 6080-01 00 BOTTOM COVER ASSY, MODEL 511

LINE

0002 6106-11 00 1 BOTTOM COVER MODIFICATION W 4 SCREWS 0004 6079-01 00 1 POWER CABLE ASSY, MODEL 511 0006 210141 1 CONNECTOR, DC PWR JACK, SOLDER TERM 0007 161060 0 EPOXY, 2 PART (5/7), GRAY 0008 161090 0 TAPE, FOAM, B-41 NEOPRENE, .5W X .125T, BLK, 0009 280201 4 ROLL PIN, 2.5MM DIA X 10MM LONG, STAINLESS ST 0010 280202 4 O-RING, 15/64 OD X 7/64 ID X .070 THK, SILICON 0011 5645-10 00 0 WIRE, 30AWG, DARK BLUE, CS95 ALLOY, FEP INSUL

PART

REV QPA DESCRIPTION

Model 511 Service Man ual 6116-90-00

Page 65

Model 511 Assemblies

ASSY: 6079-01 00 POWER CABLE ASSY, MODEL 511

LINE PART NO REV QP A DESCRIPTION 0001 211417 1 CONNECTOR, 4 PIN, RECEPTACLE, 28AWG THRU 26AW

0002 5639-10 00 0 WIRE, 28AWG, BLACK, CS95 ALLOY, FEP INSULATION 0003 5641-10 00 0 WIRE, 28AWG, RED, CS95 ALLOY, FEP INSULATION 0004 5644-10 00 0 WIRE, 28AWG, GREEN, CS95 ALLOY, FEP INSULATION

ASSY: 6108-01 00 SPO2 MODULE ASSY, MODEL 511

LINE

0001 2710-01 01 1 ANALOG BOARD ASSY 0002 2711-01 01 1 DIGITAL BOARD ASSY 0003 6107-07 XX 1 PROGRAM, EPROM ASSY, SPO2, MODEL 511 0004 6105-01 00 1 CABLE ASSY , SPO2 INPUT, HAND HELD 0005 161060 0 EPOXY, 2 PART (5/7), GRAY 0006 482578 1 LCD 0007 5911-10 00 1 PANEL, END, MODEL 511

ASSY: 2710-01 00 Analog Board Assy

LINE PART NO R EV QPA DESCRIPTION

0001 2710-02 00 1 FAB, ANALOG BOARD 0002 2710-03 00 0 SCHEMATIC, ANALOG BOARD 0003 154062 2 CAPACITOR, .01UF, 50V, 10%, X7R, SURFACE MOUNT 0004 154072 36 CAPA CITOR, .1UF, 50V, 10%, CERAMIC CHIP, SURF 0005 154079 3 CAPACITOR, 10UF, 16V, 10%, TANTALUM, SURFACE 0006 154080 13 CAPACITOR, 47UF, 10VDC, 10%, TANTALUM, SURFACE 0007 154084 1 CAPACITOR, 2700PF, 100V, 10%, X7R, MLTILYR CER. 0008 154085 2 CAPACITOR, 47PF, 100VDC, 5%, MLTILYR CER, SURF. 0009 154088 5 CAPACITOR, .1UF, 50VDC, METALZD POLYCARBONATE 0010 180019 1 INDUCTOR, 100UH, 10%, SURFACE MOUNT 0011 180021 1 INDUCTOR, 20UH PARALLEL/80UH SERIES, SURF ACE 0012 180022 1 INDUCTOR, 10UH, 10%, SURFACE MOUNT 0013 211415 1 CONNECTOR, 4 PIN, HEADER, .079 SP, R ANG, PC 0014 211718 1 CONNECTOR, 7 PIN, HEADER, .079 SP, R ANG, PC 0015 213005 2 CONNECTOR, 30 PIN, PLUG, DIL, .05 SP 0016 472198 1 RESISTOR, 3.3 OHM, 1/4W, 1%, CARBON 0017 472200 1 RESISTOR, 5.6 OHM, 1/4W, 1% 0018 472274 1 RESISTOR, 26.7 OHM, 1/4W, 1% 0019 474138 9 RESISTOR, 100 OHM, 1/8W, 1%, SURFACE MOUNT 0020 474153 22 RESISTOR, 42.2K OHM, 1/8W, 1%, SURFACE MOUNT 0021 474157 3 RESISTOR, 511 OHM, 1/8W, 1%, SURFACE MOUNT 0022 474165 5 RESISTOR, 10K OHM, 1/8W, 1%, SURFACE MOUNT 0023 474166 8 RESISTOR, 100K OHM, 1/8W, 1%, SURFACE MOUNT 0024 474172 9 RESISTOR, 10 OHM, 1/8W, 1%, SURFACE MOUNT 0025 474175 5 RESISTOR, 3.92K OHM, 1/8W, 1%, SURFACE MOUNT 0026 481546 4 DIODE, MMBD914L, SWITCHING, SURFACE MOUNT 0027 481547 2 DIODE, MMBD301L, HOT CARRIER SCHOTTKY, SURF M

PART

REV QPA DESCRIPTION

(see next listing for revision 01 boards)

18-Jul-94 Model 511 Service Manual

Page 66

Section 14 Parts Lists

LINE PART NO R EV Q PA DESCRIPTION

0028 481549 1 DIODE, MBRS140T3, RECTIFIER, SURFACE MOUNT 0029 484061 2 TRANSISTOR, MMBT2222ALT1, NPN, SOT-23, SURF M 0030 484541 1 VOLTAGE REGULATOR, LM317LD, +1.2V - +37V OUT, 0031 484548 1 VOLTAGE CONVERTER, MAX752CWE, DC-DC, +5V @ 20 0032 484549 1 VOLTAGE CONVERTER, LT1044CS8, 5VDC, 8 PIN SURF 0033 484550 1 VOLTAGE REGULATOR, LT1121CS8-5, +5V, 150MA 0034 485532 4 TRANSISTOR, 2N7002, N-CHANNEL ENHAN MODE 0035 485537 3 TRANSISTOR, SI9942D Y, MOSFET, N/P-CHANNEL 0036 486324 1 IC, DG444DY, QUAD SPST CMOS ANALOG SW 0037 486332 2 IC, AD7703BR, 20-BIT A TO D CONVERTER, SURFACE 0038 486334 1 IC, MC14051BD, 8-CH ANALOG MUX/DEMUX, 16 PIN 0039 486788 1 IC, LT1019CS8-2.5, PREC VOLTA GE REF, 2.5V 0040 486794 1 IC, PM7524FS, 8-BIT D TO A CONV, 16 PIN, SURF 0041 486795 1 IC, TLC549ID, 8-BIT A TO D CONV, SERIAL 0042 486796 1 IC, TLC2272CD, DUAL OP AMP, RAIL TO RAIL 0043 487084 3 IC, OP-282GS, DUAL JFET OP AMP, L PWR, H SPD 0044 515074 1 FUSE, 1/16A, 125V, VERY FAST-ACTING, SUBMIN 0045 515076 1 FUSE, 1/2A, 125V, VERY-FAST ACTING, SUBMIN

ASSY: 2710-01 01 ANALOG BOARD ASSY, MODEL 510 - SPOT CHECK

LINE

0001 2710-02 01 1 FAB, ANALOG BOARD 0002 2710-03 01 0 SCHEMATIC, ANALOG BOARD 0003 154062 2 CAPACITOR, .01UF, 50V, 10%, X7R, SURFACE MOUNT 0004 154072 40 CAPACITOR, .1UF, 50V, 10%, CERAMIC CHIP, SURF 0005 154079 3 CAPACITOR, 10UF, 16V, 10%, TANTALUM, SURFACE 0006 154080 13 CAPACITOR, 47UF, 10VDC, 10%, TANTALUM, SURFACE 0007 154084 1 CAPACITOR, 2700PF, 100V, 10%, X7R, MLTILYR CER 0008 154 085 2 CAPACITOR, 47PF, 100VDC, 5%, MLTILYR CER, SURF 0009 154 088 3 CAPACITOR, .1UF, 50VDC, META LZD POLYCARBONATE 0010 180019 1 INDUCTOR, 100UH, 10%, SURFACE MOUNT 0011 180021 1 INDUCTOR, 20UH PARALLEL/80UH SERIES, SURFACE 0012 180022 1 INDUCTOR, 10UH, 10%, SURFACE MOUNT 0013 211 415 1 CONNECTOR, 4 PIN, HEADER, .079 SP, R ANG, PC 0014 211 718 1 CONNECTOR, 7 PIN, HEADER, .079 SP, R ANG, PC 0015 213005 2 CONNECTOR, 30 PIN, PLUG, DIL, .05 SP, STR, SU 0016 472198 1 RESISTOR, 3.3 OHM, 1/4W, 1%, CARBON 0017 472200 1 RESISTOR, 5.6 OHM, 1/4W, 1% 0018 472274 1 RESISTOR, 26.7 OHM, 1/4W, 1% 0019 474 138 9 RESISTOR, 100 OHM, 1/8W, 1%, SURFACE MOUNT 0020 474153 19 RESISTOR, 42.2K OHM, 1/8W, 1%, SURFACE MOUNT 0021 474 157 3 RESISTOR, 511 OHM, 1/8W, 1%, SURFACE MOUNT 0022 474165 6 RESISTOR, 10K OHM, 1/8W, 1%, SURFACE MOUNT 0023 474166 8 RESISTOR, 100K OHM, 1/8W, 1%, SURFACE MOUNT 0024 474172 9 RESISTOR, 10 OHM, 1/8W, 1%, SURF ACE MOUNT 0025 474175 5 RESISTOR, 3.92K OHM, 1/8W, 1%, SURFACE MOUNT 0026 481546 4 DIODE, MMBD914L, SWITCHING, SURFACE MOUNT

PART

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Model 511 Assemblies

LINE

0027 481547 2 DIODE, MMBD301L, HOT CARRIER SCHOTTKY, SURF M 0028 481 549 1 DIODE, MBRS140T3, RECTIFIER, SURFACE MOUNT 0029 484060 2 TRANSISTOR, MMBT3904T, NPN, SURF ACE MOUNT 0030 484 541 1 VOLTAGE REGULATOR, LM317LD, +1.2V - +37V OUT, 0031 484 548 1 VOLTAGE CONVERTER, MAX752CWE, DC-DC 0032 484 549 1 VOLTAGE CONVERTER, LT1044CS8, 5VDC, 8 PIN SUR 0033 484 550 1 VOLTAGE REGULATOR, LT1121CS8-5, +5V, 150MA 0033 484 551 0 VOLTAGE REGULATOR, MAX666CSA, +5VDC, 50MA 0034 485 532 6 TRANSISTOR, 2N7002, N-CHANNEL ENHAN MODE 0035 485537 1 TRANSISTOR, SI9942DY, MOSFET, N/P-CHANNEL 0036 486324 1 IC, DG444DY, QUAD SPST CMOS ANALOG SW, SURF M 0037 486332 2 IC, AD7703BR, 20-BIT A TO D CONVERTER, SURFAC 0038 486334 1 IC, MC14051BD, 8-CH ANALOG MUX/DEMUX, 16 PIN 0039 486788 1 IC, LT1019CS8-2.5, PREC VOLTAGE REF, 2.5V 0040 486794 1 IC, PM7524FS, 8-BIT D TO A CONV, 16 PIN, SURF 0041 486795 1 IC, TLC549ID, 8-BIT A TO D CONV, SERIAL CONTR 0042 486796 1 IC, TLC2272CD, DUAL OP AMP, RAIL TO RAIL 0043 487 084 3 IC, OP-282GS, DUAL JFET OP AMP, L PWR, H SPD 0044 515074 1 FUSE, 1/16A, 125V, VERY FAST-A CTING, SUBMIN 0045 515 076 1 FUSE, 1/2A, 125V, VERY-FAST ACTING, SUBMIN 0046 485541 1 TRANSISTOR, SI9947DY, MOSFET, DUAL P-CH ENH

PART

REV QPA DESCRIPTION

ASSY: 2711-01 00 Digital Board Assy

LINE PART NO R EV Q PA DESCRIPTION

0001 2711-02 00 1 FAB, DIGITAL BOARD 0002 2711-03 00 0 SCHEMATIC, DIGITAL BOARD 0003 5965-07 XX 1 PROGRAM, PEEL ASSY, CSIO CONTROLLER 0004 5966-07 XX 1 PROGRAM, PEEL ASSY, TIMING SEQUENCER 0005 130011 1 ALARM, 4KHZ, .66 DIA X .16 HIGH, W 4 IN. L LE 0006 154072 16 CAPACITOR, .1UF, 50V, 10%, CERAMIC CHIP, SURF 0007 154079 3 CAPACITOR, 10UF, 16V, 10%, TANTALUM, SURFACE 0008 154082 3 CAPACITOR, 22PF, 100V, 10%, NPO, MLTILYR CERAMIC 0009 180011 1 FERRITE BEAD, 22 AWG TCW WIRE THRU CORE 0010 211631 1 CONNECTOR, 6 PIN, FLEX CABLE VERT ENTRY, PC MNT 0011 213004 2 CONN, 30 PIN, RCPTLE, DIL, .05 SP, STR, SURF 0012 213509 1 CONNECTOR, 50 PIN, HEADER, DIL, .050 SP, R ANGLE 0013 215059 1 SOCKET, 32 PIN, LOW PROFILE, .6 SPACING 0014 215072 2 SOCKET STRIP, 15 PIN, SIL, .100 SPACING, PC MNT 0015 230023 1 CRYSTAL, 12.288 MHZ, HC49S CASE 0016 280207 0 SPACER, 3/16 DIA X 1/8 LONG, .09 DIA CLRNCE, 0017 474137 1 RESISTOR, 1M OHM, 1/8W, 1%, SURFACE MOUNT 0018 474138 3 RESISTOR, 100 OHM, 1/8W, 1%, SURFACE MOUNT 0019 474165 9 RESISTOR, 10K OHM, 1/8W, 1%, SURFACE MOUNT 0020 474166 18 RESISTOR, 100K OHM, 1/8W, 1%, SURFACE MOUNT 0021 481546 5 DIODE, MMBD914L, SWITCHING, SURFACE MOUNT 0022 482581 2 LAMP, CLEAR, PC MOUNT 0023 485532 6 TRANSISTOR, 2N7002, N-CHANNEL ENHAN MODE, SUR

(see next listing for revision 01 boards)

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Section 14 Parts Lists

LINE PART NO R EV Q PA DESCRIPTION

0024 486031 1 IC, MAX7231CFIQH, TRIPLXD LCD DECODER/DRIVER 0025 486306 1 IC, MCM60L256AF10, 32K X 8 CMOS SRAM, 100NS 0026 486319 1 IC, MC14020BD , 14-BIT BINARY COUNTER, SURF MNT 0027 486320 1 IC, SN74HC14D, HEX SCHMITT-TRIGGER INV, SURF 0028 486321 1 IC, SN74HC138D, 3-LINE TO 8-LINE DECDR, SURF 0029 486323 2 IC, SN74HC573DW, OCTAL D-TYPE LATCH 0030 486329 2 IC, SN74HC32D , QUAD 2-IN. POS OR GATE, SURF MNT 0031 486333 1 IC, HD64180RCP-6X, 8-BIT MPU, HI INT, 68 PIN 0032 487085 1 IC, MAX872CSA, 2.5V PREC VOLTAGE REF, SURFACE 0033 487086 1 IC, MAX690ACSA, MICPRCS SUPERVISORY CKT, 8 PIN

ASSY: 2711-01 01 DIGITAL BOARD ASSY, MODEL 510 - SPOT CHECK

LINE

0001 2711-02 01 1 FAB, DIGITAL BOARD 0002 2711-03 01 0 SCHEMATIC, DIGITAL BOARD 0003 5965-07 XX 1 PROGRAM, PEEL ASSY, CSIO CONTROLLER 0004 5966-07 XX 1 PROGRAM, PEEL ASSY , TIMING SEQUENCER 0005 130011 1 ALARM, 4KHZ, .66 DIA X .16 HIGH, W 4 IN. L 0006 154072 14 CAPACITOR, .1UF, 50V , 10%, CERAMIC CHIP, SURF 0008 154082 3 CAPACITOR, 22PF, 100V, 10%, NPO, MLTILYR CER 0009 180011 1 FERRITE BEAD, 22 AWG TCW WIRE THRU CORE 0010 211631 1 CONNECTOR, 6 PIN, FLEX CABLE VERT ENTRY 0011 213004 2 CONN, 30 PIN, RCPTLE, DIL, .05 SP, STR, SURF 0012 213509 1 CONNECTOR, 50 PIN, HEADER, DIL, .050 SP, R ANGLE 0013 215059 1 SOCKET, 32 PIN, LOW PROFILE, .6 SPACING 0014 215072 2 SOCKET STRIP, 15 PIN, SIL, .100 SPACING, PC MNT 0015 230023 1 CRYSTAL, 12.288 MHZ, HC49S CASE 0016 280207 0 SPACER, 3/16 DIA X 1/8 LONG, .09 DIA CLRNCE, 0018 474138 2 RESISTOR, 100 OHM, 1/8W, 1%, SURFACE MOUNT 0019 474165 9 RESISTOR, 10K OHM, 1/8W, 1%, SURFACE MOUNT 0020 474166 18 RESISTOR, 100K OHM, 1/8W, 1%, SURFACE MOUNT 0021 481546 5 DIODE, MMBD914L, SWITCHING, SURFACE MOUNT 0022 482581 2 LAMP, CLEAR, PC MOUNT 0023 485532 5 TRANSISTOR, 2N7002, N-CHANNEL ENHAN MODE, SUR 0024 486031 1 IC, MAX7231CFIQH, TRIPLXD LCD DECODER/DRIVER 0025 486306 1 IC, MCM60L256AF10, 32K X 8 CMOS SRAM, 100NS 0026 486319 1 IC, MC14020BD, 14-BIT BINARY COUNTER, SURF MNT 0027 486320 1 IC, SN74HC14D, HEX SCHMITT-TRIGGER INV, SURF 0028 486321 1 IC, SN74HC138D, 3-LINE TO 8-LINE DECDR, SURF 0029 486323 2 IC, SN74HC573DW, OCTAL D-TYPE LATCH 0030 486329 2 IC, SN74HC32D, QUAD 2-IN. POS OR GATE, SURF MNT 0031 486333 1 IC, HD64180RCP-6X, 8-BIT MPU, HI INT, 68 PIN 0034 487098 1 IC, MAX705CSA, UPROCESSOR SPRVISORY CKT

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ASSY: 6105-01 00 CABLE ASSY, SPO2 INPUT

Model 511 Assemblies

LINE

0001 5906-16 00 1 STRAIN RELIEF, SPO2 INPUT CABLE 0002 5707-01 00 1 CABLE SUB-ASSY, 8 FOOT EXTENSION WITH OXYSNAP 0003 211719 1 CONNECTOR, 7 PIN, RECEPTACLE, 28AWG THRU 26AW 0004 605303 0 #30 AWG. TEFLON WIRE, ORANGE 0005 608003 0 TUBING, HEAT SHRINK, 1/8 (3.2) DIA, BLACK 0006 608005 0 TUBING, HEAT SHRINK, 1/16 (1.6) DIA, BLACK

PART

REV QPA DESCRIPTION

ASSY: 5707-01 00 CABLE SUB-ASSY, 8 FOOT EXTENSION WITH OXYSNAP

LINE

0001 8884-10 01 8 CABLE, 30AWG, 3 SINGLE & 1 TW SHLD PR, POLYUR 0002 9618-22 01 0 DESIGN SPECIFICATION, OXYSNAP CONNECTOR SYS.

PART

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Section 14 Parts Lists

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Drawing Description 6116-09 Overall Wiring Diagram

2710-01 Analog Board, Assy 2710-03 Analog Board, Schematic 2711-01 Dig i tal Board, Assy 2711-03 Digital Board, Schematic

Table 9. Schematic and Assem bly Drawings

Schematic and Assembly Drawings

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Section 15 Schematic and Assembly Drawings

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Model 511 Service Man ual 6116-90-00