Datascope Accutorr Plus Service manual

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INTRODUCTION

VAULT COPY

Rev AB.1 is available in Vault-PM on Voyager

Chapters

1. Operation

2. Theory of Operation

3. Specifications

4. Repair Information

5. Schematics

6. Parts

7. Calibration

8. Preventive Maintenance

A complete, detailed table of contents begins on page iii. Also, on the first page of each chapter a table of contents for that chapter is provided.

FOREWORD

This Service Manual (P/N 0070-00-0429) is intended as a guide, for technically qualified personnel, to use during repair and calibration procedures for the Accutorr Plus (part number 0998-00-0444-XX). NOTE: See the serial number label on the rear panel of the unit for part number identification. This manual also includes information on the Recorder and Predictive Temperature Modules.

The information in this manual has been divided into the eight chapters listed above.

This publication may have been updated to reflect product design changes and/or manual improvements. Any such changes to this manual would be accomplished by supplying replacement pages and instructions for inserting or affixing them into the manual.

NOTE

Unauthorized servicing may void the remainder of the warranty. Check with the factory or with a local authorized Datascope representative to determine the warranty status of a particular instrument.

NOTE: This product is year 2000 compliant.

Accutorr Plus, Service Manual i Chapter 1 - Operation

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ii Accutorr Plus, Service Manual

Chapter 1 - Operation

TABLE OF CONTENTS

INTRODUCTION .......................................i

1.0 OPERATION .......................................1-1

1.1 Introduction.........................................1-1

1.2 Controls and Indicators.................................1-3

1.2.1 Front Panel..................................1-4

1.2.2 Rear Panel ..................................1-13

1.2.3 Predictive Thermometer Module .................1-14

1.2.4 Recorder Module .............................1-15

1.3 Operation...........................................1-17

1.3.1 Setting-Up / Turning Power On ..................1-17

1.3.2 Patient Setup and Room/Bed Assignment...........1-18

1.3.2.1 Selecting the Patient Size .......................1-18

1.3.2.2 Cuff Inflation Pressure .........................1-18

1.3.2.3 Room Number and Bed Letter ...................1-19

1.3.3 Manual NIBP Measurements and General NIBP

Measurement Information.......................1-20

1.3.3.1 NIBP Pressure Limit Fail Safe....................1-22

1.3.3.2 Cuff Inflation Time............................1-22

1.3.3.3 Automatic Adjustment of Cuff Inflation Pressure

(Adaptive Inflation) ...........................1-22

1.3.4 Automatic NIBP Measurements (Interval Mode) .....1-23

1.3.4.1 Canceling an Automatic NIBP Measurement ........1-23

1.3.4.2 Changing the Interval setting ....................1-24

1.3.4.3 Effects of Changing the Room Number and /or Bed

Letter on the Interval Setting ....................1-24

1.3.4.4 Start and Deflate Functions......................1-24

1.3.5 Alarms .....................................1-25

1.3.5.1 Setting Alarm Limits ..........................1-25

1.3.5.2 Alarm Violations .............................1-26

1.3.5.3 How to Mute Alarms ..........................1-27

1.3.5.4 Alarms and Changing the Room Number and/or

Bed Letter...................................1-27

1.3.6 To View and Delete Stored Data (Trend Mode).......1-28

1.3.6.1 To View the Stored Measurements on the Accutorr

Plus NIBP ..................................1-28

1.3.6.2 To View the Stored Measurements on the Accutorr Plus NIBP with Trend Screen and the Accutorr Plus NIBP with Trend Screen and SpO

................1-29

Accutorr Plus Service Manual iii Introduction

1.3.6.3 To Delete the Stored Measurements on all

Models of the Accutorr Plus .....................1-29

1.3.7 Setting the Alarm Volume and Beep Volume ........1-30

1.3.8 Setting the LCD Contrast (View Angle Adjustment) . . 1-31

1.3.9 Display Time Out Mode........................1-32

1.3.10 SpO

Measurements (Accutorr Plus model with SpO2) . 1-33

1.3.10.1 Datascope Pulse Oximetry Sensors ................1-33

1.3.10.2 Sequence for Establishing SpO

with Nellcor®Pulse

Oximetry* ..................................1-37

1.3.10.3 Sequence for Establishing SpO

with MasimoÒPulse

Oximetry* ..................................1-40

1.3.11 Temperature Measurement (optional) ..............1-43

1.3.11.1 Predictive Thermometer Measurements ............1-43

1.3.11.2 How to Apply Probe Cover (PTM) ................1-43

1.3.11.3 How to Take Oral, Rectal, and Axillary Temperatures . 1-44

1.3.11.4 Storing Temperature Measurements ...............1-45

1.3.12 Recorder (optional) ............................1-46

1.3.13 How to Set the Clock (Date and Time) .............1-47

1.3.14 Battery Operation .............................1-48

1.3.15 User Configuration ............................1-49

1.3.16 Status and Error Codes .........................1-51

1.3.17 How to Attach Optional Thermometer and

Recorder Modules.............................1-52

1.3.18 Placement of the Quick Reference Card ............1-53

1.3.19 Placement of Recorder Paper Loading Label .........1-54

2.0 THEORY OF OPERATION ...........................2-1

2.1 Block Diagrams ......................................2-1

2.2 Detailed Circuit Descriptions ............................2-2

2.2.1 LED/CPU Module, 0670-00-0650-03, -04..........2-9

2.2.1.1 Hardware Overview ...........................2-9

2.2.1.2 Software Overview ............................2-9

2.2.1.3 Detailed Hardware Description...................2-10

2.2.2 NIBP Module, Linear Bleed .....................2-17

2.2.3 Recorder Module .............................2-20

2.2.4 Predictive Thermometer Module .................2-21

2.2.5 SpO

Module (Accutorr Plus with SpO2only) .......2-22

2.2.6 Main Power Supply............................2-25

2.2.7 Communication Board .........................2-26

2.2.8 LCD Inverter Module - 0670-00-0649 .............2-28

2.2.9 Nellcor

MP 304 SpO2Circuit Board

Theory of Operation ...........................2-29

2.2.10 Interface Nellcor

iv Accutorr Plus Service Manual

Revised 12/20/00

Board Theory of Operation .......2-30

Introduction

2.2.11 Masimo SETÒTechnology......................2-31

2.2.12 Masimo Interface Board Theory of Operation ........2-32

3.0 SPECIFICATIONS ..................................3-1

3.1. Performance Specifications ..............................3-1

3.2 Safety Characteristics ..................................3-6

3.3 Physical Characteristics ................................3-7

3.4 Environmental Characteristics ...........................3-7

3.5 Electrical Ratings .....................................3-7

3.6 Agency Compliance ...................................3-8

3.7 Electromagnetic Compatibility...........................3-8

4.0 REPAIR INFORMATION ............................4-1

4.1 Introduction.........................................4-1

4.2 Safety Precautions.....................................4-2

4.3 General Troubleshooting Guidelines ......................4-2

4.4 Test Equipment Required ..............................4-3

4.5 Troubleshooting (Problem Isolation) ......................4-4

4.5.1 Isolating the Problem, System Level ...............4-5

4.5.2 Isolating the Problem within the Main Unit.........4-5

4.5.3 Isolating the Problem with Optional Accessory Modules. . . 4-6

4.5.4 Clinical Issues................................4-6

4.6 Disassembly Instructions ...............................4-9

4.6.1 Removal of the Rear Housing (27) ................4-9

4.6.2 Removal of the Front Bezel (2) ...................4-9

4.6.3 Removal of the Keyboard Assembly (4).............4-9

4.6.4 Removal of the CPU Board Assembly (8) ...........4-10

4.6.5 Removal of the NIBP Circuit Assembly (30) ........4-10

4.6.6 Removal of the Power Supply Assembly (41) ........4-10

4.6.7 Removal of the Motor Filter and LCD

High Voltage Assembly (35) ....................4-11

4.6.8 Removal of the NIBP Air Pump Assembly (37) ......4-11

4.6.9 Removal of the LCD Display Assembly and Back Light (5) 4-11

4.6.10 Removal of the SpO

Circuit Board (40)............4-11

4.6.11 Removal and Replacement of the Internal Sealed

Lead Acid or Li-Ion Battery .....................4-12

4.6.12 Removal of the AC Input Receptacle Assembly (16) . . . 4-12

4.6.13 Thermal Printer (Optional Module) ...............4-12

4.6.14 Thermometer, Predictive (Optional Module) ........4-13

4.6.15 AccuTemp IR, Infrared Thermometer (optional

module) ....................................4-13

4.6.16 AccuTemp IR Mounting Cradle ..................4-13

Accutorr Plus Service Manual v Introduction

Revised 12/20/00

4.6.17 Communication Board (45)......................4-13

5.0 ASSEMBLY AND SCHEMATIC DIAGRAMS ............5-1

6.0 REPLACEMENT PARTS .............................6-1

6.1 Introduction .........................................6-1

6.2 Available Replacement Parts and Sub-Assemblies ............6-1

6.3 Product Variations and Options ..........................6-1

6.4 Exchange Program ....................................6-1

6.5 Replacement Parts Pricing Information ....................6-2

6.6 Ordering Information..................................6-2

6.7 Abbreviations........................................6-3

6.8 Isometric Drawings and Parts List ........................6-5

6.8.1 Accutorr Plus Isometric Parts List (All Models) ......6-5

6.8.2 Recorder Module Isometric Parts List ..............6-13

6.8.3 Predictive Temperature Module Isometric Parts List. . . 6-15

6.8.4 Mobile Stand Type 1 (Gray Base) Assembly Parts List . 6-17

6.8.5 Mobile Stand Type 2 (Black Base) Assembly Parts List . 6-19

6.8.6 Mounting Options ............................6-19

6.9 Circuit Board Parts Lists................................6-21

7.0 CALIBRATION.....................................7-1

7.1 Introduction .........................................7-3

7.2 Warnings and Guidelines...............................7-3

7.3 Test Equipment and Special Tools Required.................7-3

7.4 Power-Up Sequence, Internal Testing......................7-4

7.5 Service Diagnostics....................................7-4

7.5.1 Introduction (Hidden Key) ......................7-4

7.5.2 Software Version Test (0a, 0b)....................7-5

7.5.3 Keypad Test .................................7-6

7.5.4 LED Test (2a, 2b) .............................7-7

7.5.5 Communications Test (3a, 3b) ...................7-7

7.5.6 Recorder Test (4) .............................7-7

7.5.6.1 Recorder Print Head Adjustment .................7-8

7.5.7 Pump Test (5)................................7-8

7.5.8 Leak Test (7).................................7-9

7.5.9 Over Pressure Test (8a, 8b, 8c) ...................7-9

7.5.10 Pulse Channel DC Offset Test (9a, 9b, 9c) ..........7-10

7.5.11 Pulse Channel Average Noise Test (10a, 10b, 10c) ....7-10

7.5.12 Main Pressure Transducer Verification Test

(11a, 11b, 11c) ...............................7-11

vi Accutorr Plus Service Manual

Revised 9/20/07

Introduction

7.5.13 Verification of Accutorr Plus Pneumatic Performance,

Using the “Cufflink” NIBP Emulator (11d) .........7-11

7.5.14 Over Pressure Transducer Verification (12c, 12a, 12b) . 7-12

7.5.15 Main Pressure Transducer Calibration..............7-12

7.5.16 Over Pressure Transducer Calibration ..............7-13

7.5.17 Battery Selection (13) ..........................7-13

7.6 Predictive Thermometer Verification and Calibration..........7-14

7.6.1 Temperature Accuracy Verification with the

Predictive Temperature Simulator ................7-14

7.6.2 Water Bath Method ...........................7-15

7.6.3 System Calibration Procedure ....................7-15

7.6.4 Temperature Verification Test, Infrared

Thermometer ................................7-16

7.6.5 Low Battery Sensing ...........................7-17

7.7 Battery Test for Accutorr Plus ...........................7-18

7.7.1 Low Battery Indicator and Low Battery Cut-Off ......7-18

7.7.2 Set the Current Time ..........................7-19

7.8 NIBP Normal Operation ...............................7-20

7.9 Trend Memory Initialization ............................7-21

7.10 SpO

Normal Operation (Accutorr Plus with SpO2only) .......7-21

8.0 PREVENTIVE MAINTENANCE .......................8-1

8.1 Introduction .........................................8-1

8.2 Limitations of Physiological Simulators ....................8-1

8.3 Preventive Maintenance Schedule .........................8-2

8.3.1 Mechanical and Physical Visual Inspection

(One Year Interval) ............................8-2

8.3.2 Electrical Safety and Performance Checks

(One Year Interval) ............................8-2

Accutorr Plus Service Manual vii Introduction

Revised 09/20/07

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viii Accutorr Plus Service Manual

Introduction

1.0 OPERATION

CONTENTS OF THIS CHAPTER Page

1.1 Introduction.........................................1-1

1.2 Controls and Indicators ................................1-3

1.3 Operation...........................................1-17

1.1 INTRODUCTION

This section of the Service Manual (P/N 0070-00-0429) is provided as a review of the Accutorr Plus NIBP, the Accutorr Plus NIBP with Trend Screen and the Accutorr Plus NIBP with Trend Screen and SpO encouraged to refer to the Operating Instructions, P/N 0070-00-0428, for more complete details.

functions and operation. The reader is

Accutorr Plus, Service Manual 1-1 Chapter 1 - Operation

Revised 06/25/99

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1-2 Accutorr Plus, Service Manual

Chapter 1 - Operation

1.2 CONTROLS AND INDICATORS

This section of the Service Manual identifies and describes each control and display of the Datascope Accutorr Plus NIBP, the Accutorr Plus NIBP with Trend Screen and the Accutorr Plus NIBP with Trend Screen and SpO see Chapter 1.3, “Operation”.

The following is a list of all controls, connectors and indicators, their item number and the page number. The item number refers to the call outs on the drawings within this chapter. The page number refers to the page where the description of the item can be found.

. For step-by-step operating instructions

CONTROL Page #

FRONT PANEL

1. NIBP Systolic Display 1-8

2. NIBP Diastolic Display 1-8

3. NIBP MAP Display 1-8

4. Pulse Rate Display 1-8

5. NIBP/SpO

6. SpO

7. Liquid Crystal Display (LCD) 1-8

8. Menu Key 1-8

9. LCD Up Arrow Key 1-8

10. LCD Down Arrow Key 1-8

11. Select Key 1-9

12. Print Key 1-9

13. Print Indicator 1-9

14. Defaults Key 1-9

15. Datascope, Nellcor SpO

16. AC Power Indicator 1-9

17. Battery Indicator 1-9

18. NIBP Connector 1-9

19. On/Standby Key 1-9

20. Memory Full Indicator 1-9

21. Delete Info. Key 1-10

22. Data Scan Key 1-10

23. Data Scan Indicator 1-10

24. Room/Bed Key 1-10

25. Bed Letter Display 1-10

26. Room Number Display 1-10

27. Patient Info. Down Arrow Key 1-10

28. Patient Info. Up Arrow Key 1-10

29. Set Alarms Key 1-11

Pulse Rate Indicator 1-8

Display 1-8

or Masimo

Connector 1-9

CONTROL Page#

30. Mute Key 1-10

31. Mute Indicator 1-11

32. Timer/Temp Key 1-11

33. Interval/Elap. Time/Temp Display 1-11

34. Interval Key 1-11

35. Interval Indicator 1-11

36. Deflate Key 1-12

37. Patient Setup Key 1-12

38. Start NIBP Key 1-12

39. Start NIBP Indicator 1-12

40. Patient Size Indicators 1-12

41. Hidden Key 1-12

REAR PANEL

42. Thermometer Module Connector 1-13

43. Equipotential Lug 1-13

44. AC Power Connector 1-13

45. Communications Connector 1-13

46. Datascope Connector 1-13

47. Pole Mounting Handle and Cam 1-13

48. Recorder Module Connector 1-13

PREDICTIVE THERMOMETER MODULE

49. Probe Cover Holder 1-14

50. Probe Chamber 1-14

51. Probe Connector 1-14

RECORDER MODULE

52. Paper Door 1-15

53. Paper Tear Edge 1-15

Accutorr Plus Service Manual 1-3 Chapter 1, Operation

Revised 02/15/00

1.2.1 Front Panel

NIBP

SYS.

DIA.

NIBP

Sp0

SpO

20/05 20/05 20/05 20/05 20/05

MAP

03:00 02:58 02:35 02:33

02:30

S/D/M

114/64 123/61

127/62

185/105

129/62

SELECTMENU

TIMER/TEMP

ALARMS

PATIENT INFO.

83 84 83

135

PATIENT

SETUP

INTERVAL TEMPELAP.TIME

MUTE

ROOM BED

F/C

98.7

98.5

97.6

----

98.2

DEFAULTS

MEMORY F ULL

START

NIBP

DEFLATE

INTERVAL

ALARMS

ROOM

BED

DATA SCAN

DELETE

INFO.

HOLDT OCLEAR.

%SPO2

96 97 96

96 97

STANDBY

SET

Figure 1-1 Front Panel - Accutorr Plus NIBP with Trend Screen and Datascope SpO

181716151413121110

1-4 Accutorr Plus Service Manual

Chapter 1, Operation

NIBP

SYS.

DIA.

NIBP

Sp0

SpO

20/05 20/05 20/05 20/05 20/05

MAP

03:00 02:58 02:35 02:33

02:30

S/D/M

114/64 123/61

127/62

185/105

129/62

SELECTMENU

TIMER/TEMP

ALARMS

PATIENT INFO.

83 84 83

135

PATIENT

SETUP

INTERVAL TEMPELAP.TIME

MUTE

ROOM BED

F/C

98.7

98.5

97.6

----

98.2

DEFAULTS

MEMORY F ULL

START

NIBP

DEFLATE

INTERVAL

ALARMS

ROOM

DATA SCAN

DELETE

INFO.

HOLDTO CLEAR.

%SPO2

96 97 96

96 97

STANDBY

SET

BED

Nellcor

Figure 1-2 Front Panel - Accutorr Plus NIBP with Trend Screen and Nellcor

Accutorr Plus Service Manual 1-5 Chapter 1, Operation

181716151413121110

or Masimo SpO

Revised 02/15/00

1. NIBP Systolic Display

Displays the systolic blood pressure data from NIBP measurements. It is also used to display NIBP error codes and systolic alarm limits.

2. NIBP Diastolic Display

Displays the diastolic blood pressure data from NIBP measurements. It is also used to display diastolic alarm limits.

3. NIBP MAP Display

Displays the mean arterial pressure (MAP) information from NIBP measurements. During a measurement, it will display the cuff pressure. It is also used to display the MAP alarm limits and the inflation pressure when selecting the initial inflation pressure.

4. Pulse Rate Display

Displays the pulse rate information from either the NIBP measurement or the SpO2 reading (Accutorr Plus model with SpO

). It is also used to display pulse rate alarm

limits.

5. NIBP/SpO

Pulse Rate Indicator

When the pulse rate displayed is based on an NIBP measurement, then NIBP is illu minated. When the pulse rate displayed is based on an SpO (Accutorr Plus model with SpO

6. SpO

Display (Accutorr Plus model with SpO2)

Displays the %SpO the %SpO

alarm limits.

measurement information. This area is also used to display

), then SpO2is illuminated.

measurement

7. Liquid Crystal Display (LCD) (Accutorr Plus models with Trend Screen)

The Liquid Crystal Display (LCD) is used to display previous measurements (trend list) for the selected patient, or a menu that controls the beep volume and alarm volume.

8. Menu Key (Accutorr Plus models with Trend Screen)

This key is used to toggle between the trend list screen and the menu screen in the LCD. When the back light in the LCD is off, pressing this key turns it on. This key is also used to adjust the LCD contrast. Press and hold the key for two beeps to enter the adjustment mode. Use the Arrow keys (9 and 10) to change the contrast.

9. LCD Up Arrow Key (Accutorr Plus models with Trend Screen)

This key is used to scroll the trend data so that more recent measurements are displayed in the LCD. When the back light in the LCD is off, pressing this key turns it on. This key is also used to adjust the LCD contrast when in the adjustment mode. Use the Menu key (8) to enter the adjustment mode.

10. LCD Down Arrow Key (Accutorr Plus models with Trend Screen)

This key is used to scroll the trend data so that older measurements are displayed in the LCD. When the back light in the LCD is off, pressing this key turns it on. This key is also used to adjust the LCD contrast when in the adjustment mode. Use the Menu key (8) to enter the adjustment mode.

1-8 Accutorr Plus Service Manual

Chapter 1, Operation

11. Select Key (Accutorr Plus models with Trend Screen)

When the menu screen is displayed in the LCD, this key is used to select the menu items. When the back light in the LCD is off, pressing this key turns it on.

12. Print Key

Press this key to print all stored information for the selected patient. Press to stop a printing that is in process. Press and hold this key (2 single beep tones, approx. 3 seconds) to change the print mode between Continuous and Request. When in the Continuous mode, the PRINT Indicator LED is illuminated. When loading in a new roll of recorder paper, press this key to feed the paper through the printer.

13. Print Indicator

This indicator is illuminated when continuous printing of measurements is selected.

14. Defaults Key

Press and hold this key (2 single beep tones, approx. 3 seconds) to reset all parameters back to the hospital default settings. This includes alarms, inflation pressure, interval, etc... When in the process of making a change to a setting, you can return to the original setting by momentarily pressing this key. To enter the User Configuration, press and hold this key (1 beep tone), while turning the unit on. See section 1.3.15 for details on default settings and User Configuration.

15. SpO

Connector (Accutorr Plus model with Datascope, Nellcor®or Masimo SpO2)

This connector is used to attach Datascope, Nellcor

or Masimo SpO2sensors.

16. AC Power Indicator

This green

LED illuminates whenever AC power is applied to the unit.

17. Battery Indicator

This green

LED illuminates whenever the unit is operating on battery power. The

LED will flash when the battery requires charging. When the LED begins flashing, approximately 30 minutes of battery time remain on the Accutorr Plus NIBP (20 minutes on the Accutorr Plus NIBP with Trend Screen and 10 minutes on the Accutorr Plus NIBP with Trend Screen and SpO

2).

18. NIBP Connector

This connector is used to attach specified NIBP hoses.

19. On/Standby Key

This key is used to activate the unit, enabling it to begin taking measurements. The unit does not have to be “ON” for the internal battery to charge. However, the unit does need to be plugged into an AC receptacle for the battery to be charging.

20. Memory Full Indicator

This LED indicator flashes when 80 - 99 of the 100 available entries of trend are used. This LED is on continuously when 100 are used. Delete measurements manually using the DELETE INFO. key or the unit will automatically delete the oldest measurement for the current patient. NOTE: The unit will also automatically delete data that is 24 hours old.

Accutorr Plus Service Manual 1-9 Chapter 1, Operation

Revised 02/15/00

21. Delete Info. Key

Press the Data Scan key to enable the Delete Info. key (Accutorr Plus without Trend and SpO

only). Once enabled, press and hold this key (1 beep tone, approx. 3 seconds)

to delete the most recent reading when it is displayed. When displaying any measurement, press and hold this key (2 beep tones, approx. 6 seconds) to delete all information for the currently selected patient. Press and hold at power up to delete all information for all patients.

22. Data Scan Key

Press this key (1 beep tone) to view previous measurements for the selected patient on the Accutorr Plus NIBP and to enable the Delete Info. key (Accutorr Plus with out Trend and SpO

only). The LED indicator next to the key illuminates. On the

Accutorr Plus NIBP, use the Patient Info. Up & Down Arrow keys (27 & 28) to scroll through the stored measurements for the selected patient. On all models of the Accutorr Plus, press and hold this key (2 beep tones, approx. 6 seconds) to scan all of the rooms and beds for stored measurements. Press the Data Scan key again to stop on a particular room/bed. Press the Data Scan key again to exit this view mode.

23. Data Scan Indicator

This LED indicator is illuminated when viewing prior data.

24. Room/Bed Number Key

Press this key to change the displayed Room/Bed. After pressing this key use the Patient Info. Up & Down Arrow keys (27 & 28) to change the Room/Bed. This key is also used when selecting a User Configuration item.

25. Bed Letter Display

This display is used to show the current patient bed letter. It is also used to display status codes for NIBP, SpO

and Temperature and to display User Configuration

items.

26. Room Number Display

This display is used to show the current patient room number. It is also used to display status codes for NIBP, SpO

and Temperature, indicates which alarm is

being set (Hi or Lo), and displays a User Configuration item.

27. Patient Info. Down Arrow Key

This key is used to decrement the alarm limits when they are shown on the LED displays and to decrement the hours, minutes, month, day and year in the clock set mode. This key is also used to change the Room/Bed, to scroll through previous data and to change initial inflation pressure.

28. Patient Info. Up Arrow Key

This key is used to increment the alarm limits when they are shown on the LED displays and to increment the hours, minutes, month, day and year in the clock set mode. This key is also used to change the Room/Bed, to scroll through previous data and to change initial inflation pressure.

1-10 Accutorr Plus Service Manual

Chapter 1, Operation

29. Set Alarms Key

This key is used to select the NIBP and SpO

(Accutorr Plus model with SpO2)

alarms to be changed. Repeated presses of this key sequences through the choices of Systolic Hi, Systolic Lo, Diastolic Hi, Diastolic Lo, Map Hi, Map Lo, Pulse Rate Hi, Pulse Rate Lo, SpO

Hi and SpO2Lo. After the last available parameter, the next

press returns the unit to normal operation. Once the desired parameter is flashing, use the Patient Info. Up & Down Arrow keys (27 & 28) to increment or decrement the alarm values.

30. Mute Key

Press this key (one beep tone), to silence the current alarm tone for 2 minutes. If a new alarm is detected during the 2 minutes, a new alarm tone will sound. Press and hold (2 beep tones, approx. 3 seconds) to permanently silence all alarm tones. Press this key again (1 beep tone), to activate alarm tones.

31. Mute Indicator

This LED indicator is illuminated when the alarm tone has been silenced permanently and when the alarm volume is set to OFF.

32. Timer/Temp Key

This key is used to switch between viewing the elapsed time or the temperature in the Interval/Elap. Time/Temp Display. When viewing stored measurements on the Accutorr Plus NIBP, press this key to switch between viewing the temperature and time of the measurement.

33. Interval/Elap. Time/Temp Display

This displays the time, in minutes since the last successful NIBP measurement (Elap. Time is illuminated). When the Interval key is pressed, the Elap. Time changes to the current Interval setting (Interval is illuminated). When the Predictive thermometer probe is removed from its holder, the Elap. Time changes to Temp (Temp is illuminated).

Either “85.0" (° F) or ”29.4" (° C) will display; this is an internal self test feature. As

the Predictive thermometer is taking a measurement, the display will flash as the number increases. When the final temperature measurement is determined, the display will no longer flash and a beep tone is generated. When the AccuTemp IR thermometer is used, the temperature is not displayed until after the measurement is taken and the thermometer is placed back into its holder. This display will also show the current time and date when setting the clock.

34. Interval Key

Press to enter the set time interval mode. An interval is set for automatic NIBP measurement cycles. To sequence through the interval choices of: OFF (——, when set to display graphics), CONT (Continuous), 1, 2.5, 5, 10, 15, 20, 30, 60, 120 and 240 minutes, repeatedly press the Interval key. When the desired interval is displayed in the Interval/Elap. Time/Temp Display the TIMER/TEMP key may be pressed to enter the interval setting or, the displayed setting will be entered when 15 seconds have elapsed without pressing the Patient Info. Up or Down arrow keys (27 & 28).

35. Interval Indicator

When an interval setting is selected, except for Off, the Interval Indicator flashes. When the interval mode is activated the Interval Indicator illuminates continuously.

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Revised 06/25/99

36. Deflate Key

Press this key to stop an

NIBP measurement that is in progress and deflate the cuff. A

new measurement cycle will not be allowed for 10 seconds following the use of this key. The Start NIBP LED indicator is illuminated when a new measurement can begin. Press this key while in the interval mode to suspend the interval operation.

37. Patient Setup Key

Press this key (1 beep tone) to select the patient size. Each time the key is pressed the patient size will change. The choices will cycle from Adult, Pediatric, Neonate, Adult, Pediatric, Neonate, etc...

PRECAUTION: It is the users responsibility, when changing the room/bed, to assure the patient size and alarm settings are set as required.

This key is also used to view the cuff inflation pressure for an NIBP measurement. Press and hold (2 beep tones, approx. 3 seconds) to display the current inflation pressure in the MAP display. Use the Patient Info. Up & Down Arrow keys (27 &

28) to change the cuff pressure.

38. Start NIBP Key

Press this key to initiate an

NIBP measurement. If a measurement is already in

progress, a new measurement can not be initiated until a minimum of 10 seconds after the end of the one in progress (30 seconds when in the interval mode). The Start NIBP LED indicator is illuminated when a measurement can begin.

39. Start NIBP Indicator

This LED indicator is illuminated when the Accutorr Plus is ready to initiate an NIBP measurement.

40. Patient Size Indicators

One of theses LEDs illuminates to indicate the selected patient size.

41. Hidden Key

To enter the Service Diagnostics mode, press and hold this key (1 beep tone) while the Accutorr Plus is powering on and running the self tests (all “8"’s displayed in the LEDs). The Service Diagnostics mode is used to initiate various performance tests that are to be done by technical service personnel only. To exit Service Diagnostics, power down the Accutorr Plus by pressing the On/Standby key.

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Chapter 1, Operation

1.2.2 Rear Panel

Figure 1-5 Rear Panel - All Units

42. Thermometer Module Connector

Used to attached one of the optional Datascope thermometer modules (PTM or AccuTemp IR).

43. Equipotential Lug

Provides equipotential bonding between hospital equipment.

AC Power Connector

44.

Allows for

A.C. power cord connection.

45. Communications Connector

Provides compatible communications to external devices and hospital’s information system.

46. Datascope Connector

Used by Datascope Technical Service Personnel.

47. Pole Mounting Handle and Cam

Provides the ability to quickly mount the Accutorr Plus to a rolling pole.

48. Recorder Module Connector

Used to connect the optional Datascope recorder module.

Accutorr Plus Service Manual 1-13 Chapter 1, Operation

1.2.3 Predictive Thermometer Module (PTM)

Figure 1-6 Predictive Thermometer Module

49. Probe Cover Holder

Used to store a box of probe covers.

50. Probe Chamber

Used to store the temperature probe when not in use.

51. Probe Connector

Used to connect the thermometer probe to the PTM module.

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Chapter 1, Operation

1.2.4 Recorder Module

Figure 1-7 Recorder Module

52. Paper Door

Open this door when loading recorder paper.

53. Paper Tear Edge

The paper tear edge is used to tear off printed recorder strips. The edge can be removed in the event of a paper jam that needs to be cleared.

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1-16 Accutorr Plus Service Manual

Chapter 1, Operation

1.3. OPERATION

This section of the Service Manual provides guidelines and step-by-step instructions for proper operation of the Accutorr Plus NIBP, Accutorr Plus NIBP with Trend Screen, and the Accutorr Plus NIBP with Trend Screen and SpO

. The numbers in parentheses ( ) refer to the items described

in Section 1.2, “Controls and Indicators”. When a described feature refers to a particular model, it will be noted. When the name Accutorr Plus is used, it refers to all 5 models.

1.3.1 SETTING-UP / TURNING POWER ON

1. Before turning the power on, check the rear panel for voltage requirements. Confirm proper voltage is available.

2. Before turning the power on, connect any required modules (recorder, thermometer). For instructions on connecting modules, see section 1.3.17.

Upon installation of any optional modules, a test is required after power up (step 5). For the recorder, press the print key and the recorder will feed the paper to verify proper function. For the Predictive thermometer, remove the probe from its holder and verify 85.0 (29.4) appears in the Interval/Elap. Time/Temp display.

3. If additional communications capabilities are required, attach a communications interface cable to the rear panel COMMUNICATIONS CONNECTOR (45) and to the corresponding interface connector on the peripheral instrument.

4. Attach the AC power cord into the rear panel

AC POWER CONNECTOR (44) and into a

grounded (3-prong) Hospital Grade AC receptacle. Do not use an adapter to defeat the ground. The green

AC POWER INDICATOR (16) illuminates, indicating AC power

has been applied. The internal battery charges automatically when AC power is applied.

WARNING: When attached to other products ensure that the total chassis leakage currents of all units (combined) do not exceed 100mA.

5. Press the ON/STANDBY key (19) to activate the unit. If it is required to enter the User Configuration mode, press and hold the DEFAULTS key (14) while the unit is powering on. See section 1.3.15 for more details on the User Configuration mode.

6. The unit begins a countdown from 20 and performs internal diagnostic tests. Any status codes are displayed in the appropriate LED. See section 1.3.16 for a list of status codes. At the end of power up, all of the displays (including the LCD on the Accutorr Plus models with Trend Screen) illuminate and then blank, except the Bed Letter and Room Number displays (25 & 26) which does not blank. A beep tone will sound during the power up sequence to confirm the operation of the audio indicator. If the time and date need to be set, see section 1.3.13 for instructions.

7. On an Accutorr Plus models with Trend Screen, adjust the contrast on the LCD if necessary. To adjust the contrast, press and hold the MENU key (8) (2 beep tones, approx. 3 seconds). Use the LCD UP & LCD Down ARROW keys (9 & 10) to adjust the contrast. See section 1.3.8, Setting the LCD Contrast, for more details.

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Revised 12/20/00

1.3.2 PATIENT SETUP AND ROOM/BED ASSIGNMENT

1.3.2.1 Selecting the Patient Size

The Patient Size is selected using the PATIENT SETUP key (37).

1. Press the PATIENT SETUP key (37) to

select the Patient size. Three choices are

Adult

NeonatePediatric

available: Adult, Pediatric and Neonate. Each time the key is pressed the patient size changes. The indicator under the graphic of the patient size illuminates to indicate which size is selected. The factory default setting for the Patient size is Adult. See section 1.3.15, “User

PATIENT

SETUP

Configuration” to set a custom default setting. NOTE: Do not press and hold

Figure 1-8 - Patient Size Graphics and Indicators

the PATIENT SETUP key to change the patient size. Pressing and holding this key, enter the initial cuff inflation pressure change mode.

1.3.2.2 Cuff Inflation Pressure

The initial cuff inflation pressure depends on the Patient Size setting. The initial cuff inflation pressures are listed in the table below. The initial cuff inflation pressures can be modified from the default (custom or factory) settings. When the Accutorr Plus is powered down, these modifications are deleted.

1. To change the initial cuff inflation pressure, press and hold the PATIENT SETUP key (37) (2 beep tones, approx. 3 seconds). The current initial cuff pressure for the selected patient size displays in the MAP display.

2. Use the Patient Info. Up and Down Arrow keys (27 & 28) to change the pressure.

3. Once the desired pressure is displayed, press the PATIENT SETUP key (37) to enter this value. NOTE: Waiting 15 seconds will also enter this value.

PATIENT SIZE SETTING

Adult

Pediatric

Neonate

INITIAL FACTORY DEFAULT CUFF INFLATION VALUES

180 mmHg 100 mmHg 260 mmHg 5 mmHg 140 mmHg 60 mmHg 160 mmHg 5 mmHg 100 mmHg 40 mmHg 120 mmHg 5 mmHg

LOWEST SELECTABLE PRESSURE

HIGHEST SELECTABLE PRESSURE

INCREMENT

NOTE: The default patient size and initial cuff inflation pressure can be customized. See section 1.3.15, “User Configuration” for details on how to set custom defaults.

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Chapter 1, Operation

1.3.2.3 Room Number and Bed Letter

To monitor more than one patient, assign each patient to a particular room number and bed letter. Use the ROOM/BED key (24) to set the room number from 0 to 99 and the bed letter as a, b, c or d. On initial power up (no stored patient data), the room number and bed letter default to 0,a.

1. Press the ROOM/BED key (24). The ROOM LED flashes indicating that the room number can now be changed.

2. Press the Patient Info. Up or Down Arrow key (27 & 28) to increment or decrement the room number.

3. Press the ROOM/BED key again. The BED LED flashes.

4. Press the Patient Info. Up or Down Arrow key (27 & 28) to increment or decrement the bed letter.

5. Press the ROOM/BED key a third time to exit this mode, or do not press the key for 15 seconds.

Once measurements have been taken, and the unit is powered off and on, the room number and bed letter will default to the lowest room and bed where data is currently stored.

Press to increase or decrease the Room Number and Bed Letter

PATIENT INFO.

ROOM BED

MEMORY F ULL

ROOM

BED

DATA SCAN

DELETE

INFO.

HOLDT OCLEAR.

Figure 1-9 - Room Number and Bed Letter

Keys and Indicators

Press to change the R oom Numbe and Bed Le tter

Accutorr Plus Service Manual 1-19 Chapter 1, Operation

1.3.3 MANUAL NIBP MEASUREMENTS AND GENERAL NIBP MEASUREMENT INFORMATION

1. Select a pressure cuff that is appropriate for the size of the patient. Use the chart below

as a guideline.

Limb Circumference (cm) Description / Cuff Name Datascope Part Number Disposable Cuffs - Latex Free

30 - 45 Large Adult 0683-07-0001-01 24 - 36 Adult 0683-07-0001-02 18 - 27 Child 0683-07-0001-03 16 - 25 Small Child 0683-07-0001-04

Disposable Neonatal Cuffs (box of 10)

Approximate Limb Circumference: Size 0:5-8cm 0683-03-0004-01 Size 1:7-10cm 0683-03-0001-01 Size 2:9-13cm 0683-03-0002-01 Size 3: 12 - 17 cm 0683-03-0003-01

Color Coded Cuffs** - Reusable Cuffs

45 - 66 Thigh - Tan* 0998-00-0003-36 30 - 47 Large Adult - Gray 0998-00-0003-35 24 - 36 Adult - Brown 0998-00-0003-34 18 - 27 Child - Red 0998-00-0003-33 6 - 11 New Born - Blue 0998-00-0003-31

Infant 0998-00-0003-32

A cuff that is too small for the limb will result in erroneously high readings. The correct size of the pressure cuff for a given patient has, among other considerations, a direct bearing on the accuracy of the obtained NIBP measurements. Base your selection of the cuff size on the limb circumference of the patient. The table above indicates the available Datascope cuffs for use with the Accutorr Plus. The design dimensions of the cuffs and their intended uses are based on recommendations of the American Heart Association.

NOTE: The cuffs that are used with the Accutorr Plus use special snap on connectors. Adapter hoses are available to connect older style cuff connectors. See Optional Accessories, Section 5.2 in the Operating Instructions for a detailed list of cuffs and adapter hoses.

WARNING: Use only Datascope cuffs. Use of other than Datascope cuffs may result in erroneous measurements.

The pressure on the limb may not fall to zero between measurements if the cuff is wrapped too tightly. Therefore, assure that the cuff is properly applied.

The skin is sometimes fragile (i.e., on pediatrics, geriatrics, etc.). In these cases, a longer timer interval should be considered to decrease the number of cuff inflations over a period of time. NOTE: In extreme cases, a thin layer of soft roll or webril cotton padding may be applied to the limb in order to cushion the skin when the cuff is inflated. This measure may affect NIBP performance and should be used with caution.

* When using the thigh cuff, this product may not comply with product specifications listed in chapter 3.

** The limb circumferences of the color coded cuffs adhere to the AHA guidelines for size. They also incorporate

index and range lines to assist in cuff selection. The cuff bladder and hose contain Natural Latex rubber. The bladder has a dacron cover.

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Chapter 1, Operation

2. Attach the cuff hose to the NIBP cuff connector (18). To do this, hold the hose behind the knurled pressure fitting (female). Push onto the male connector until a click is heard. To remove, hold the knurled female fitting and pull firmly to release.

3. Apply the cuff to the patient. To reduce errors, the cuff should fit snugly, but with enough room for two fingers to be placed between the cuff and the patient’s arm (on adults), and with little or no air present within the cuff. Cuff should fit loosely on neonates. Apply the cuff so that the center of the inflation bag (bladder) is over the brachial artery. Be sure that the INDEX line on the cuff falls between the two RANGE lines. If not, a larger or smaller cuff is required. Be sure the cuff lies directly against the patient’s skin. For best results, the cuff should be placed on the arm at heart level and no clothing should come between the patient and the cuff. NOTE: Avoid compression or restriction of the pressure hose. NOTE: The NIBP cuff should not be placed on a limb that is being utilized for any other medical procedure. For example, an I.V. catheter.

4. If required, select the patient size with the PATIENT SETUP key (37). On initial power up, the configurable default setting is used. Otherwise, the last selected patient size is used. Initial default cuff inflation pressures depend on the Patient Size setting. See section 1.3.2.2 for details on changing the initial cuff inflation pressure.

5. Press the START NIBP key (38) to begin an NIBP measurement. A beep is sounded after a completed measurement.

NOTE: Inflate the cuff only after proper application to the patient’s limb. Cuff damage can result if the cuff is left unwrapped and then inflated.

The cuff begins to inflate to the selected cuff pressure. After reaching the selected pressure, the cuff begins to slowly deflate and the Accutorr Plus collects oscillometric pulsations.

If the initial cuff inflation is found to be inadequate, the unit retries with a higher inflation pressure (+50 mmHg in the adult mode; +50 in the pediatric mode; +40 mmHg in the neonate mode). A triple beep tone is generated. NOTE: Any time there is an unsuccessful NIBP measurement, a triple beep tone is generated and the Diastolic, Systolic, NIBP HR, MAP and Timer/Temp LED’s will be replaced with dashes.

Have the patient remain still to avoid unnecessary motion artifact. After the cuff pressure drops below the diastolic pressure, the results of the measurement are displayed and the cuff is vented to atmosphere.

If an error code displays in the Systolic Display or a status code in the Room/Bed Display, refer to Section 1.3.16, Status and Error Codes, for its explanation. A successful measurement clears a status code. To clear a status code, press the ROOM/BED NUMBER key (24).

6. When required, press the DEFLATE key (36) to interrupt a measurement. The cuff will deflate.

NOTE: Once the initial measurement is taken for a room/bed, the Accutorr Plus will continue to use the selected patient size.

NOTE: Check the patient’s limb for any indications of circulation impairment.

Accutorr Plus Service Manual 1-21 Chapter 1, Operation

1.3.3.1 NIBP Pres sure Limit Fail Safe

If the cuff is over-pressurized, it will au to mat i cally de flate and the sta tus code 8812

(STOP - CUFF OVERPRESSURE) or er ror code 987 (STOP - HARD WARE OVERPRESSURE) will be dis played in the Room/Bed or dis play.

The unit must be turned off and back on again to re set the hard ware overpressure switch (er ror code 987) be fore any new mea sure ments can be taken.

1.3.3.2 Cuff In fla tion Time

If the cuff pres sure does not at tain 20 mmHg within 40 sec onds of the start of in fla tion or if the tar get pres sure is not reached within an other 60 sec onds, then the cuff is de flated and sta tus codes will be dis played in the Room/Bed dis play. See sec tion 1.3.16 for a list of er ror and sta tus codes.

1.3.3.3 Au to matic Ad just ment of Cuff In fla tion Pres sure (Adap tive In fla tion)

The unit ad justs the in fla tion pres sure ac cord ing to the pre vi ous read ing of the sys tolic pres sure. Af ter the first suc cess ful mea sure ment, the in fla tion pres sure is the pre vi ous sys tolic +50 mmHg in the adult mode and +50 mmHg in the pe di at ric mode and +40 mmHg in the ne o nate mode. When not in interval mode, the adaptive inflation may be disabled.

To view the cur rent in fla tion pres sure, press and hold (2 beep tones, ap prox i mately 3 sec onds) the Pa tient Setup Key (37). The cur rent in fla tion pres sure is shown in the MAP dis play. If re quired, use the Pa tient Info. Up & Down Ar row keys (27 & 28) to change the in fla tion pres sure.

It is also pos si ble to per ma nently over ride this ad just ment in the User Con fig u ra tion. See sec tion 1.3.15 for de tails.

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Chapter 1, Operation

1.3.4 AUTOMATIC NIBP MEASUREMENTS (Interval Mode)

The Accutorr Plus can be set to au to mat i cally take NIBP mea sure ments. On ini tial power up, the in ter val set ting will de fault to OFF. The User Con fig u ra tion mode can be used to set cus tom de faults for the In ter val Mode. See sec tion 1.3.15, User Con fig u ra tion for de tails. In this mode, the adaptive inflation is always enabled.

Fol low Steps 1 - 4 in the Man ual Pro ce dure, Sec tion 1.3.3, to se lect, at tach and ap ply the cuff and to ad just the ini tial cuff in fla tion pres sure.

5. Press the IN TER VAL key (34). The cur rent se lec tion is dis played in the In ter val/ Elap.Time/Temp. dis play (33). Press the IN TER VAL key to scroll to the next avail able in ter val se lec tion. The se lec tions are: Off (—- when set to graphic dis play), CONT (con tin u ous), 1, 2.5, 5, 10, 15, 20, 30, 60, 120 and 240 min utes. When an in ter val set ting is se lected, ex cept for Off, the In ter val In di ca tor (35) flashes. When the in ter v al mode is ac ti vated the In ter val In di ca tor il lu mi nates con tin u ously.

6. The dis played in ter val time is en tered when the IN TER VAL key has not been pressed for 15 sec onds or, when the TIMER/TEMP key (32) is pressed, which changes the dis play back to Elap. Time or, when the START NIBP key (38) is pressed, which ini ti ates an NIBP mea sure ment, ac ti vates the In ter val Mode, and changes the dis play back to Elap. Time.

7. If the START NIBP key (38) has not al ready been pressed, press to take a mea sure ment and to ac ti vate the in ter val mode. NOTE: If the in ter val time is changed, the START NIBP key does not need to be pressed for the new in ter val to ini ti ate. When the new time in ter val has elapsed, a mea sure ment will be taken.

NOTE: When the NIBP con tin u ous in ter val is cho sen, the Accutorr Plus will take back to back (one right af ter the other) blood pres sure read ings. As a safety pre cau tion, a five min ute limit is placed on con tin u ous mea sure ments. Af ter 5 min utes, the NIBP in ter val will au to mat i cally switch to mea sure ments taken once ev ery 5 min utes. This is done to re duce the chance of sur face ves sel rup ture (petechia).

If it is desirable to maintain a fixed cuff inflation pressure, the adaptive inflation feature may be disabled in this “continuous” mode.

1.3.4.1 Can celing an Au to matic NIBP Mea sure ment

To can cel a sched uled mea sure ment, press the DE FLATE key (36). This will sus pend the timed NIBP mea sure ments un til the START NIBP key (38) is pressed. The in ter val in di ca tor will flash. See sec tion 1.3.4.4 for more de tails on the start and de flate func tion.

NOTE: Pressing the DE FLATE key (36) will also end a mea sure ment cy cle that is al ready in prog ress.

To take an im me di ate mea sure ment and to re ac ti vate the In ter val mode, press the START NIBP key (38). The next timed mea sure ment will be taken at the time set by the in ter val. For ex am ple, if the in ter val was set to 30 min utes, the next timed mea sure ment will be 30 min utes af ter the START NIBP key was pressed. NOTE: If the In ter val mode is no lon ger re quired, set the in ter val to “OFF” prior to press ing the START NIBP key. See sec tion 3.4 for de tails on chang ing the in ter val mode.

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Re vised 05/22/02

NOTE: If the DEFLATE key (36) is pressed, it will take 10 seconds before another measurement can be taken. The START NIBP INDICATOR (39) will be illuminated, when ready.

NOTE: When in the Interval mode and the Room/Bed is changed, the interval mode is suspended (interval indicator flashes) until the NIBP Start key is pressed.

1.3.4.2 Changing the Interval Setting

If the interval time is changed while the Accutorr Plus is in the interval mode, the new interval time is used once it is entered. For example: The interval time is set to 60 minutes. Thirty minutes have elapsed since the last timed automatic measurement and the interval time is changed to 10 minutes. Once the interval time is entered, the Accutorr Plus will take an automatic NIBP measurement in 10 minutes and then once every 10 minutes.

1.3.4.3 Effects of Changing the Room Number and/or Bed Letter on the Interval Setting

When the Room Number and/or Bed Letter is changed, the interval setting will remain the same. NOTE: The interval setting can be changed if required. Also, if an NIBP measurement is in progress, the measurement will stop and the cuff will deflate. The timed interval measurements will not activate again (interval indicator flashes) until the START NIBP key (38) is pressed.

1.3.4.4 START and DEFLATE Functions

The START NIBP and DEFLATE functions have the following effects on the timed measurement sequence.

INTERVAL mode is active and the START NIBP key (38) is pressed causing an

unscheduled measurement to be taken. Taking this unscheduled measurement does not affect the timing of the interval cycle, therefore, the scheduled measurements will still be taken as if there were no interruptions. Only one measurement is taken for each measurement cycle - even if the unscheduled measurement coincides with the scheduled measurement.

INTERVAL mode is active and the DEFLATE key (36) is pressed. The INTERVAL

INDICATOR (35) flashes. No additional measurements will be taken until the START NIBP key (38) is pressed. If a timed measurement is in progress, the measurement is suspended and the cuff deflates.

INTERVAL mode is active and the interval time is changed. The measurement cycle is

reset with the new interval. A measurement will be taken after the new interval time has elapsed.

1-24 Accutorr Plus Service Manual

Chapter 1, Operation

1.3.5 ALARMS

The Accutorr Plus provides “HI” and “LO” alarm limit settings for systolic, diastolic, MAP, pulse rate and SpO parameters equals or falls outside the limits that have been specified.

1.3.5.1 Setting Alarm Limits

. An alarm violation occurs when one or more patient

The Factory Default for all parameter alarms, except Low SpO

, is OFF. The Low SpO

factory default is 86. The User Configuration mode can be used to set custom defaults. See section 1.3.15, User Configuration for details. The factory and custom defaults for alarms can be changed as required to accommodate the needs of individual patients. The SET ALARMS key (29) and the Patient Info. Up and Down Arrow keys (27 & 28) are used to set alarm values.

1. Press the SET ALARMS key (29) (1 beep) to enter into the alarm set mode.

The first time this key is pressed, all NIBP displays blank except for the systolic display which shows the current high systolic alarm value. The word HI is displayed in the Interval/Elap. Time/Temp display (33). When the unit has been configured to display graphics, the symbol is displayed. When the graphic is displayed, the top lines blink. This indicates the high alarm is selected.

The second time the SET ALARMS key (29) is pressed the Systolic LO parameter is selected. The word LO is displayed in the Interval/Elap. Time/Temp display (33). When the unit has been configured to display graphics, the symbol is displayed. When the graphic is displayed, the bottom lines blink. This indicates the low alarm is selected. Each time the SET ALARMS key (29) is pressed a new parameter is selected for alarm setting (all other displays blank). The order they are available is: Systolic HI, Systolic LO, Diastolic HI, Diastolic LO, MAP HI, MAP LO, Pulse Rate HI, and Pulse Rate LO, SpO

HI and SpO2LO. When all of the available parameters have been selected,

the next press of the SET ALARMS key returns the Accutorr Plus to normal operation.

2. To change an alarm limit setting, use the Patient Info. Up & Down Arrow keys (27 &

28). The Up arrow increments the alarm limit setting. The Down arrow decrements the alarm limit setting.

To cancel all of the changed alarm values while still in progress of changing, press the DEFAULTS key (14) (1 beep tone).

If the SET ALARMS or Arrow keys have not been pressed for 15 seconds, the Accutorr Plus returns to normal operation and saves any alarm limit changes.

NOTE: If the patient size is changed, the alarm settings will change to the default settings for the new patient size.

Accutorr Plus Service Manual 1-25 Chapter 1, Operation

Revised 12/20/00

Alarm Limit Table

PARAMETER RANGE UNITS FACTORY

DEFAULT

Systolic High

Adult Pediatric Neonate

Systolic Low

Adult Pediatric Neonate

Diastolic High

Adult Pediatric Neonate

Diastolic Low

Adult Pediatric Neonate

MAP High

Adult Pediatric Neonate

MAP Low

Adult Pediatric Neonate

Pulse Rate High

Adult Pediatric Neonate

Pulse Rate Low

Adult Pediatric Neonate

SpO2 High

Adult Pediatric Neonate

SpO2 Low

Adult Pediatric Neonate

Off, 60-260 Off, 60-160 Off, 50-125

Off, 55-150 Off, 55-130 Off, 45-115

Off, 40-200 Off, 40-150 Off, 35-100

Off, 30-120 Off, 30-50 Off, 25-50

Off, 90-200 Off, 90-150 Off, 60-110

Off, 40-100 Off, 40-70 Off, 30-70

Off, 100-245 Off, 100-245 Off, 100-245

Off, 35-120 Off, 35-150 Off, 75-200

Off, 61-99 Off, 61-99 Off,61-99

60-95 60-95 60-95

mmHg Off 5

bpm Off 5

%SpO2 Off 1

%SpO2 86 1

UNITS OF INCREMENT

1.3.5.2 Alarm Violations

An alarm condition exists if the parameter is equal to or is outside the high/low limit range that has been set. When an alarm limit is violated, the following actions occur:

The LEDs for the parameter in an alarm condition flashes.

The parameter inan alarmcondition is inreverse videoon the LCD(Accutorr Plus models

with Trend Screen).

The alarm tone is sounded (unless muted with the MUTE key (30)).

The parameter(s) that was in an alarm condition will be in brackets [ ] when printed on

the recorder.

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Chapter 1, Operation

1.3.5.3 How to Mute Alarms

When an NIBP alarm ex ists, press the MUTE key (30) (1 beep tone) to si lence the alarm tone for 2 min utes. The alarm tone will re turn af ter the next measurement value that violates the selected limits.

When an SpO2 alarm ex ists, press the MUTE key (30) (1 beep tone) to si lence the alarm tone for two min utes. The alarm tone will re turn af ter two min utes, un less the SpO

value changes and is within the alarm lim its. If dur ing that two min utes the mea sured SpO2 value changes to a value that is within the ac cept able range, and then re turns to a value that is out side the set alarm limit, the alarm tone will re turn be fore the two

min utes elapse. Ex am ple (within 2 min utes): • SpO2 low alarm limit has been set to 90.

• SpO2 is mea sured at 89; the alarm tone sounds and the SpO2 dis play flashes. • The MUTE key is pressed. • SpO2 is mea sured at 88; there is no alarm tone, but the SpO

dis play flashes. • SpO2 is mea sured at 91; no alarm tone sounds and the dis play stops flash ing. • SpO2 is mea sured at 89; the alarm tone sounds and the SpO2 dis play flashes.

Press and hold the MUTE key (30) (2 beep tones, approx. 3 sec onds) to per ma nently si lence the alarm tone. The MUTE LED (31) il lu mi nated. The LEDs for the alarm ing pa ram e ter will con tinue to flash. To re ac ti vate the alarm tone func tion, press the MUTE key (30) again.

1.3.5.4 Alarms and Changing the Room Num ber and/or Bed Let ter

When chang ing the rooms and beds, the alarm set tings will change if the fi nal room/bed dis played is a dif fer ent pa tient size than the orig i nal room/bed. When a new pa tient size is de tected, the alarm set tings change to the de faults for the dif fer ent pa tient size. See sec t ion

1.3.15 for in for ma tion on cus tom de faults. The ta ble be low de scribes 6 mea sure ments in dif fer ent rooms/beds and dif fer ent pa tient

sizes, and the ef fect on the alarm set tings.

Mea sure ment Or der Room/Bed Pa tient Size Alarm Set tings

1 2 1/b Adult Re main the same. 3 2/a Pe di at ric Changed to de faults for a

4 5 4/a Adult Re main the same.

6 1/a Adult Re main the same. If the alarm

1/a Adult Have been man u ally set.

pe di at ric size pa tient.

3/a Adult Changed to de faults for an adult

size pa tient.

set tings that were set from the 1st mea sure ment are re quired, they need to be set again man u ally.

NOTE: The alarm set tings can be changed, if nec es sary, when chang ing the room/bed and the pa tient size is the same.

PRE CAU TION: It is the us ers re spon si bil ity, when chang ing the room/bed, to as sure the pa tient size and alarm set tings are as re quired.

Accutorr Plus Service Manual 1-27 Chapter 1, Operation

Re vised 05/22/02

1.3.6 TO VIEW AND DELETE STORED DATA (Trend Mode)

All models of the Accutorr Plus are capable of storing up to 100 entries of measurement data. Each time a successful NIBP measurement is made, the data is automatically stored in memory. When a temperature measurement is made between two minutes before and two minutes after an NIBP measurement, it is stored as the same entry with the NIBP measurement. If a temperature measurement is made outside this time, it is stored as a separate entry. When either NIBP or temperature measurements are stored and SpO information is available, then the SpO2data is also stored.

When 80 entries are stored into trend memory, the MEMORY FULL Indicator (20) will flash. When 100 entries are stored into trend memory, the MEMORY FULL Indicator (20) will illuminate continuously. Once 100 entries are stored, old data can be deleted manually for any patient; or when new data is available, the Accutorr Plus will automatically delete the oldest data for the currently displayed patient. NOTE: The unit will also automatically delete data that is 24 hours old.

The Accutorr Plus NIBP uses the Systolic, Diastolic, MAP, and Temp displays to view stored data. The Accutorr Plus models with Trend Screen use the LCD to display up to 5 measurements at a time. The stored data that is viewed is for the currently selected patient (indicated by the room number/bed letter).

1.3.6.1 To View the Stored Measurements on the Accutorr Plus NIBP

1. Press the DATA SCAN key (22) (1 beep tone). The DATA SCAN Indicator (23)

illuminates.

2. Press the Patient Info. Up and Down Arrow keys (27 & 28) to view stored data for the

current patient. The stored data is displayed in the Systolic, Diastolic, MAP, Pulse Rate and Temp displays.

Consecutive presses or pressing and holding the UP or DOWN arrow will allow the stored measurements to continuously wrap around. When the measurements wrap, a double beep tone will sound. If a temperature measurement is not available for the NIBP measurement that is displayed, then ----isshown in the Interval/Elap. Time/Temp display (33). To view the time of measurements, press the TIME/TEMP key (32).

3. To exit the view stored data mode, press the DATA SCAN key (22) (1 beep).

1-28 Accutorr Plus Service Manual

Revised 12/20/00

Chapter 1, Operation

1.3.6.2 To View the Stored Measurements on the Accutorr Plus NIBP with Trend Screen and the Accutorr Plus NIBP with Trend Screen and SpO

The stored measurements on the Accutorr Plus models with Trend Screen are displayed in the LCD. Up to 5 stored measurements are displayed at one time. Measurements are displayed in time order, with the newest measurement at the top. A scroll bar with one or both arrows will display on the side of the LCD when more measurements are available to view. When only one arrow displays, more measurements are only available in the direction of the arrow.

1. To view more measurements press the LCD Up or Down Arrow key (9 & 10).

Time

F/C

Date

20/05 20/05 20/05 20/05 20/05

Figure 1-10 - LCD Trend List Display

03:00 02:58

02:35

02:33 02:30

S/D/M

114/64

123/61

127/62

185/105

129/62

84 83

135

Alarm Violated Measurement

98.7

98.5

97.6

----

98.2

%SPO2

96 97

96 96 97

Scroll Bar

1.3.6.3 To Delete the Stored Measurements on all Models of the Accutorr Plus

While viewing stored data, you can delete the most recent measurement or all of the stored measurements for the currently displayed patient.

1. Select a room/bed where stored information can be deleted. (See section 1.3.2.3 for

details on selecting a room/bed.) If it is the currently displayed room/bed, go to step

2. When you are uncertain what rooms/beds have stored data, press and hold the DATA SCAN key (22) (2 beep tones, more than 3 seconds). The Accutorr Plus will scan through all of the rooms/beds that have data stored. To stop on a Room/Bed as the Accutorr Plus is scanning, press the DATA SCAN key (22). NOTE: The Accutorr Plus will scan through the rooms/bed with stored data only once.

2. On the Accutorr Plus NIBP only, when the desired room/bed is displayed, press the

DATA SCAN key (22) (1 beep tone). The DATA SCAN Indicator (23) illuminates.

3. When the most recent stored data is displayed, press and hold the DELETE INFO.

key (21) (1 beep tone, approx. 3 seconds) to delete this measurement.

4. When viewing any of the stored measurements, press and hold the DELETE INFO.

key (21) (2 beep tones, approx. 6 seconds) to delete all stored measurements for the current patient. When all data is cleared the patient size will be the default selection.

5. On the Accutorr Plus NIBP only, press the DATA SCAN key (22) (1 beep tone) to

exit the delete data mode.

NOTE: The unit will also automatically delete data that is 24 hours old.

NOTE: To delete all information for all patients, press and hold the DELETE INFO. key

(21) while powering on the unit.

Accutorr Plus Service Manual 1-29 Chapter 1, Operation

1.3.7 SETTING THE ALARM VOLUME AND BEEP VOLUME

The LCD on the Accutorr Plus mod els with Trend Screen is used to dis play the Trend List as de scribed in sec tion 1.3.6. It is also used to dis play a menu which is used to set the alarm vol ume and the SpO2 beep vol ume. The MENU key (8), the LCD Up and Down Ar row keys (9 & 10), and the SE LECT key (12) are used to set these vol umes. The User Con fig u ra tion mode can be used to set cus tom de faults for the alarm vol ume and beep vol ume. See sec tion 1.3.15, User Con fig u ra tion for de tails.

1. Press the MENU key (8) to dis play the menu. The menu is shown in fig ure 3-4. The alarm vol ume is ini tially high lighted when the menu is dis played. The high light ing in di cates this item can be changed.

2. Press the LCD Up and Down Ar row keys (9 & 10) to change the cur rent se lec tion for the alarm vol ume. The se lec tions are: OFF, 1, 2, 3, 4, and 5 with 5 be ing the loud est.

3. Press the SE LECT key (11) to move the high light ing to SpO2 beep vol ume.

4. Press the LCD Up and Down Ar row keys (9 & 10) to change the cur rent se lec tion for

the SpO2 vol ume. The se lec tions are: OFF, 1, 2, 3, 4, and 5 with 5 be ing the loud est.

5. Press the MENU key (8) again to exit the menu and re turn to the Trend screen.

NOTE: Any changes made to the alarm vol ume or the SpO2 vol ume will be erased when

the unit is turned off and then back on again. Also, any changes made (except off) will restore and enable the alarm tone, regardless of prior mute condition.

Alarm Volume SpO2 Beep

Volume

Fig ure 1-11 Menu

3 3

1-30 Accutorr Plus Service Manual

Re vised 05/22/02

Chapter 1, Operation

1.3.8 SETTING THE LCD CONTRAST (View Angle Adjustment)

The LCD on the Accutorr Plus models with Trend Screen can be adjusted for optimum viewing. The MENU key (8) and the LCD Up and Down Arrow keys (9 & 10) are used to adjust the contrast.

1. Press and hold the MENU key (8) (2 beep tones, approx. 3 seconds). A beep tone is generated when the key is first pressed and the display changes to the menu. When a second beep tone is generated, release the key.

2. To quickly adjust the contrast, press and hold either the LCD Up or Down Arrow key (9 or 10). For fine adjustment, momentarily press either the LCD Up or Down Arrow key.

3. The LCD contrast adjustment is saved by either pressing the MENU key (8) again or not pressing either the LCD UP or Down Arrow keys (9 & 10) for 15 seconds.

NOTE: The contrast setting will be the same each time the unit is turned on, unless readjusted by the user.

Accutorr Plus Service Manual 1-31 Chapter 1, Operation

1.3.9 DISPLAY TIME OUT MODE

To conserve power, most displays will blank at user selected times. The LCD illumination time out can be set between 3 and 15 minutes. The LED display time out can be set between 5 and 60 minutes. Since the Accutorr Plus can be powered from either an AC or DC source, the user configuration allows the setting of separate times for each type of power source. See User Configuration, section 1.3.15 for more information on setting the time out minutes.

To turn on the LCD light, press the MENU key (8). To turn on the LED displays, press any key.

1-32 Accutorr Plus Service Manual

Chapter 1, Operation

1.3.10 SpO2MEASUREMENTS (Accutorr Plus model with SpO2)

To obtain SpO2measurements and SpO2Heart Rate from the Accutorr Plus model with SpO

See Section 3.10.1 for units with Datascope SpO2; for units with Nellcor SpO2see section 3.10.2; for units with Masimo SpO

see section 1.3.10.3)

CAUTION: Do not place the sensor on an extremity with an invasive catheter or blood pressure cuff in place.

CAUTION: A pulse oximeter should not be used as an apeana mnitor.

CAUTION: A pulse oximeter should be considered an early warning device. As a trend towards

patient deoxygenation is indicated, blood samples should be analyzed by a laboratory co-oximeter to completely understand the patient’s condition.

CAUTION: Ensure proper routing of the patient cable to avoid entanglement and/or strangulation

NOTE: In the event you are unable to obtain a reading, or the reading is inaccurate, check the patients vital signs by alternate means and consider the following:

If your patient is poorly perfused, try applying the sensor to another site (i.e. A

different finger or toe). Check that the sensor is properly aligned.

In electrosurgery, make sure the sensor is not too close to ESU devices or cables.

Check to make sure the site area is clean / non-greasy. Clean the site and sensor if

needed. Nail polish and fungus should be removed.

1.3.10.1 Datascope Pulse Oximetry Sensors

A. Introduction

A wide range of Datascope sensors are available for connection to the Accutorr Plus model with SpO

. The sensors cover both short-term and long-term monitoring needs on

patients ranging from infants to large adults.

The DATASENSOR is intended for short-term adult monitoring.

The FLEXISENSOR long-term monitoring for large adults, adult ear, adults, pediatrics, and infants. The FLEXISENSOR

The ear sensor is intended for long-term adult monitoring. A range of disposable bandages are available for use with the FLEXISENSOR

SD, available in five different sizes, provides both short-term and

SD is used when the DATASENSOR is not convenient or suitable.

SDs. They are available in 2styles, SENSOR GUARD™ (used for large adults, adults and pediatrics), and Coban with SENSOR GUARD™ (used for infants).

Use of the sensors does not cause any penetration of the skin, nor is there any electrical contact or transfer of excessive heat to the patient.

The sensor is composed of a dual light emitting diode (LED) (emitter) and a photo diode (detector). The emitter discharges two colors (wave lengths) of light into the patient’s extremity (finger, toe, ear). The detector receives the light not absorbed by the blood or tissue components. The Accutorr Plus model with SpO

then uses the

Accutorr Plus Service Manual 1-33 Chapter 1, Operation

Revised 02/15/00

relative absorption of the two light wavelengths to compute and display SpO2(functional saturation) and Pulse Rate measurements.

The key benefits of the sensors are:

Electro-Surgical Noise (ESU) Rejection - The sensor configuration of both the

DATASENSOR and the FLEXISENSOR

SD provide uninterrupted monitoring and absence of false alarmsduring theuse of ESU(ESU canbe set atany powerlevel). This design prevents electro-surgical noise entering the monitor, via the sensor, and interfer ing with unit operation.

Monitoring Restless Patients - Motion artifact rejection is achieved in several ways.

1. The sensor design used with their recommended bandages assures a snug fit of the sensor to the patient.

2. Light emitting diodes (LEDs) and detectors gather a strong signal from the patient.

3. When in the presence of motion, the software adjusts the “averaging-period”,

increasing it to a maximum of 15 seconds during motion, and automatically reducing it during quiet periods to obtain a fast response. This combination reduces the number of monitoring interruptions and false alarms from patient motion.

Tracking of Weak Peripheral Pulse Levels - Many patients suffer poor peripheral

perfusion due to hypothermia, hypovolemia, reduced cardiac output, etc. The Accutorr Plus model withSpO

is designed toautomatically increase its gain to track patients with

poor peripheral perfusion.

Rejection of Ambient Light - Many monitoring situations involve high levels of

ambient light, i.e.., operating room lights, neonatal phototherapy, heatwarmers, etc. The Accutorr Plus model with SpO

, the sensors, and the bandages each contribute to the

rejection of ambient light. The monitor automatically measures and corrects for high levels of ambientlight. Theenclosed designof theDATASENSOR prohibits the interference of high levels of ambient light on adults with sensor operation. The opaque material used in the composition of the bandages, which are used with the FLEXISENSOR

SD, helps

keep out ambient light.

Patient Comfort - The FLEXISENSOR®SD line is designed to work with a disposable

bandage of two styles (SENSOR GUARD TM and Coban) which conform comfortably and safely to the particular patient’s anatomy.

B. Sensor Selection and Application

Selection of a specific sensor is based on the patient’s size, physical condition, and expected monitoring duration. General guidelines for the selection of a sensor are provided in the Sensor Selection Table, page 3-25. Instructions for the application of a sensor to a patient are provided in each sensor package. For optimal DATASENSOR and FLEXISENSOR

placement ensure that cable side is placed in the correct position. See figures below.

Cable on Top

Cable on Bottom

Figure 1-12 Datasensor or Durasensor Placement

1-34 Accutorr Plus Service Manual

Revised 02/15/00

Figure 1-13 Flexisensor

Placement

Chapter 1, Operation

C. Sensor Connection to the Accutorr Plus model with SpO

1. Align the cable connector on the sensor assembly with the SpO2Connector (15) on the Accutorr Plus model with SpO

2. Push the cable connector into the SpO

Connector (15). Confirm that the cable

connector is securely in place.

3. The digital SpO

values and SpO2pulse rate will be displayed in the SpO2and pulse

Rate LED’s.

4. If desired, adjust the beep volume. See section 3.7, Setting the Alarm Volume and Beep Volume, for details on adjusting the beep volume.

D. Sensor Inspection

Before use, always inspect sensors, cables, and connectors for damage, i.e., cuts and abrasions. Do not use the sensor, cable or connector if damaged. Replace with a good working sensor.

For long sensor life:

Do not dropon thefloor, or give other sharpshocks to the sensor(s). Betweenuse, store the

sensors in theaccessory pouch, or coil the sensor cable and store on the side of theAccutorr Plus rolling stand using the optional cable retainer. For accessory part number information see Section 5.2, “Optional Accessories”.

Avoid running any cart, bed, or any piece of equipment over the sensor cable.

Avoid strong pulls on the sensor cable (10 lbs/4kg).

Watch for cracks in the DATASENSOR housing.

Watch for cracks, cuts, rips, fogging, or signs of moisture in the FLEXISENSOR®SD

E. Sensor Performance

For the BEST performance:

DO NOT PLACE any sensor on an extremity with an arterial catheter or blood

pressure cuff in place. Placement of an arterial catheter or blood pressure cuff on an extremity may obstruct normal blood flow. False pulse rate information may result if the FLEXISENSOR

SD is placed on that same extremity. Place the sensor on the limb

opposite the site of the arterial catheter or blood pressure cuff.

Encourage the patient to remainstill. Patient motion mayaffect the sensor’s performance.If it

is not possible for the patient to remain still, replace the sensor bandage on the FLEXISENSOR

Check the DATASENSOR site every 2 hours and check the FLEXISENSOR®SD site

SD to assure good adhesion, or change the site of the DATASENSOR.

every 8 hours forindications ofskin abrasions, sensordisplacement, sensordamage, or

circulation impairment. Check the sensor site every 4 hours if the ear clip is used. If necessary, remove andreapply the sensor. If any of the abovementioned indications occur, immediately remove the sensor and find an alternate site. NOTE: Check the sensor site more frequently on infant and active patients.

Accutorr Plus Service Manual 1-35 Chapter 1, Operation

Revised 02/15/00

Incorrect placement can also reduce the acquired sensor signal, and therefore compromise

performance. Select an alternate site (toe) or use a FLEXISENSOR® SD if the sensor can not be placed on the patient’s finger correctly or if the fingernails interfere with the acquisition of a reliable signal.

Use of the DATASENSOR is not recommended for long-term monitoring (4-6hours). For

monitoring situations exceeding 4-6 hours, either reposition the DATASENSOR every 2-4 hours toa different site (finger/toe) or use a FLEXISENSOR

SD with itsappropriate

bandage.

Do not over-tighten thesensor bandages.Excessive pressure onthe monitoringsite can

affect SpO

readings and may reduce readings below true SpO2. Excessive pressure can

also result in pressure necrosis and other skin damage.

Sensor configuration provides virtually uninterrupted monitoring during following

situations:

Electro-cautery Noise - Electro-cautery noise rejection is designed into the sensors. Motion Artifact - The monitor’s software adjusts the “averaging period” increasing it

during motion and reducing it during inactivity. This decreases the number of monitoring interruptions and false alarms.

Weak Peripheral Pulses - The monitor’s gain is automatically increased to track pulses on patients with decreased peripheral perfusion.

Datascope SpO

Sensors Large

Approximate Patient Weight

Where Used Fingers,

Long or Short Term Moni toring Electro-Surgical Interference Suppression (ESIS) Reusable Yes Up to

Bandage Type Adhesive,

Part #’s**

* <Non-adhesive bandages are recommended for premature infants to minimize prenatal skin damage.

** See Accessories, Chapter 5, for more detailed information. *** Additional choices: 0060-00-0026-02 (10’ sensor cable), 0020-00-0071-01

(3’ sensor cable plus 7’ extension cable).

Sensors 0998-00-0

Bandages 0683-00-0

Sensor Selection Table

Adult Adult (LA) >80kg/ >176 lbs

Toes

Long & Short Term Included Included Included Included Included Included

20 Uses

Disposable

076-06

409-01

(A)

0 - 90kg/

66 - 198

lbs

Fingers,

Toes

Long &

Short

Term

Yes Up to

20 Uses

Adhesive,

Disposable

0998-00-

0076-05

0683-00-

0409-02

Pediatric (P) 10 40kg/ 22-88 lbs Fingers, Toes

Long & Short Term

Yes Up to 20 Uses Adhesive, Disposable 0998-000076-04 0683-000409-03

Infant (I)

4.5 10kg/ 10-22 lbs Feet, Palms, Big Toes Long & Short Term

Yes Up to 20 Uses NonAdhesive* 0998-000074-03 0683-000415

Adult Ear (AE) >40kg/ >88 lbs

Adult Ear

Long & Short Term

Yes Up to 20 Uses Adhesive Disposable

0998-000074-05 N/A N/A

Datasensor

40+ kg/ 90+ lbs

Fingers, Toes

Short Term

Yes 6-Months

0600-00-0026-01 (3’ sensor cable)***

1-36 Accutorr Plus Service Manual

Revised 02/15/00

Chapter 1, Operation

1.3.10.2 Sequence for establishing SpO2with NellcorâPulse Oximetry*

* This feature applicable only if available or installed on your unit.

1.Select the appropriate sensor for the patient from Page 3-28

2. Plug the sensor directly into the SpO

connector (15) or if necessary, use a Nellcor

SC10 extension cable. NOTE: Do not place the sensor on an extremity with an invasive catheter or blood pressure cuff in place.

CAUTION: When equipped with Nellcor

including Nellcor

Oxisensoräpatient dedicated adhesive sensors. Use of other

SpO2, use only Nellcorâoxygen transducers

oxygen transducers may cause improper oximeter performance.

CAUTION: Tissue damage or inaccurate measurements may be caused by incorrect sensor

application or use, such as wrapping it too tightly, applying supplemental tape, failing to inspect the sensor site periodically, or failing to position it appropriately. Carefully read the sensor directions for use, the Accutorr Plus operating instructions, and all precautionary information before use.

CAUTION: Excessive ambient light may cause inaccurate measurements. Cover the sensor

with opaque materials.

CAUTION: Inaccurate readings may be caused by incorrect sensor application or use;

significant levels of dysfunctional hemoglobins, (i.e. carbohemoglobins or methemoglobin); or intra-vascular dyes such as indocyanine green methylene blue; exposure to excessive illumination, such as surgical lamps (especially ones with a Xenon light source), bilirubin lamps, florescent lights, infrared heating lamps, or direct sunlight; excessive patient movement; venous pulsations; electro-surgical interference; and placement of a sensor on an extremity that has a blood pressure cuff, arterial catheter, or intra-vascular line.

CAUTION: In certain situations in which perfusion and signal strength are low, such as in

patients with thick or pigmented skin, inaccurately low SpO

readings will

result. Verification of oxygenation should be made, especially in preterm infants and patients with chronic lung disease, before instituting any therapy or interventation.

CAUTION: If the sensor or patient cable is damaged in any way, discontinue use

immediately. To prevent damage do not soak or immerse the sensor in any liquid solution. DO NOT ATTEMPT TO STERILIZE.

3. The digital SpO

value and SpO2Pulse Rate will be displayed on the SpO2and Pulse

Rate LED’s.

4. If desired, adjust the beep volume. See Section 3.7, “Setting the Alarm Volume and Beep Volume”, for details on adjusting the beep volume.

Accutorr Plus Service Manual 1-37 Chapter 1, Operation

Revised 02/15/00

1.3.10.2.1 NELLCOR®Sensors

NELLCOR

provides a family of sensors suitable for a wide variety of clinical settings and patients. Specific sensors have been developed for neonates, infants, children, and adults. OXISENSOR™ oxygen transducers are sterile adhesive sensors with optical components mounted on adhesive tape. OXIBAND oxygen transducer system are reusable sensors that are applied with disposable adhesive. The DURASENSOR

DS-100A adult digit oxygen transducer is a reusable sensor with

its optical components mounted in a plastic casing. The NELLCOR

oxygen transducers and the DURAFORM™

RS-10 reflectance

oxygen transducer is an adhesive sensor for application to forehead or temple.

NOTE: NELLCOR of NELLCOR

®,

OXIBAND®and DURASENSOR®are registered trademarks

Incorporated. OXISENSOR™ and DURAFORM™ are trademarks of

NELLCOR Incorporated.

A. Selecting a Sensor

Sensors are designed for specific sites on patients with designated weight ranges. To select the appropriate sensor, consider the patient’s weight, level of activity, adequacy of perfusion, which sensor sites are available, whether sterility is required, and the anticipated dura

tion of monitoring.

B. Cleaning and Re-Use

Do not immerse any OXISENSOR™, DURASENSOR oxygen transducer, the NELLCOR

RS-10 oxygen transducer, or any NELLCOR adhesive in water or cleaning solution. Clean DURASENSOR®, OXIBAND®, and DURAFORM™ oxygen transducers, and the NELLCOR wiping with a disinfectant such as 70% alcohol. Do not sterilize by irradiation, steam, or ethylene oxide. Use a new OXIBAND

adhesive wrap or FORM-A adhesive bandage for

, OXIBAND®, or DURAFORM™

RS-10 oxygen transducer by

each patient. Do not re-sterilize OXISENSOR™ oxygen transducers.

C. Performance Considerations

To insure optimal performance, use an appropriate sensor, apply it as directed, and observe all warnings and cautions.

If excessive ambient light is present, cover the sensor site with opaque material. Failure to do so may result in inaccurate measurements. Light sources that can affect performance include surgical lights, especially those with a xenon light source, bilirubin lamps, fluorescent lights, infrared heating lamps, and direct sunlight. If poor perfusion affects instrument performance, and the patient weighs more than 50 kg (110 lbs.), consider using the OXISENSOR™ R-15 adult nasal oxygen transducer. Because the R-15 obtains its measurements from the nasal septal anterior ethmoid artery, an artery supplied by the internal carotid, this sensor may obtain measurements when peripheral perfusion is relatively poor. For low peripheral perfusion, consider using the NELLCOR

RS-10

reflectance oxygen transducer, which is applied to the forehead or temple.

1-38 Accutorr Plus Service Manual

Revised 02/15/00

Chapter 1, Operation

If patient movement presents a problem:

Verify that the sensor is properly and securely applied.

Use a new sensor with fresh adhesive backing.

Move the sensor to a less active site.

Use a type of sensor that tolerates some patient motion, such as the OXISENSOR™

D-25, D-20, N-25, or I20 oxygen transducer.

NELLCOR® SENSOR FAMILY SELECTION

GUIDE

Patient Size Duration of Use Sterility

Patient Activity

D25/D25L Adult

>30 kg >50 kg <3 kg

Short or Long Term

Sterile

Limited Activity

OXISENSOR adult digit oxygen transducer

R-15 Adult

Short or Long Term

Sterile

Inactive Limited

OXISENSOR adult nasal oxygen transducer

N-25 Neonatal

>40 kg Short or

Long Term Sterile

Activity OXISENSOR

neonatal oxygen transducer

I-20 Infant

1-20 kg 10-50 kg >40 kg

Short or Long Term

Sterile

Limited Activity

OXISENSOR infant digit oxygen transducer

D-20 Pediatric

Short or Long Term

Sterile

Limited Activity

OXISENSOR pediatric digit oxygen transducer

RS-10 Adult

Short Term

Nonsterile Limited Activity

RS-10 reflectance oxygen transducer

In an unopened, undamaged package.

All NELLCOR®accessories and sensors must be purchased form NELLCOR®Inc., 25495 Whitehall Street, Hayward, Ca. 94545. To contact NELLCOR

, call

1-800-NELLCOR.

D. Automatic Calibration of NELLCOR

Sensors

The oximetry subsystem incorporates automatic calibration mechanisms. It is automatically calibrated each time it is turned on, at periodic intervals thereafter, and whenever a new sensor is connected. Also, the intensity of the sensor’s LEDs is adjusted automatically to compensate for differences in tissue thickness.

Each sensor is calibrated when manufactured; the effective mean wavelength of the red LED is determined and encoded into a calibration resistor in the sensor plug. The instrument’s software reads this calibration resistor to determine the appropriate calibration coefficients for the measurements obtained by that sensor.

Accutorr Plus Service Manual 1-39 Chapter 1, Operation

Revised 02/15/00

1.3.10.3 Sequence for establishing SpO2with Masimo SetâPulse Oximetry*

* This feature applicable only if available or installed on your unit.

1. Select the appropriate sensor for the patient from the table below. All sensors below are

non-sterile and can be used during patient movement.

MASIMO®SENSOR FAMILY

SELECTION PART NUMBER PATIENT SIZE DISPOSABLE/

REUSABLE

LNOP



•Adt Adult

0600-00-0043-01 > 30 kg. Disposable Disposable Finger Sensor LNOP



•Pdt Pediatric/

0600-00-0044-01 10 to 50 kg. Disposable Slender Digit Disposable

Sensor LNOP



•Neo Neonatal

0600-00-0045-01

<10kg.

Disposable

Disposable Sensor



•NeoPt Neonatal

LNOP

0600-00-0046-01 < 1 kg. Disposable Pre-term Disposable Sensor LNOP



•DCI Adult

0600-00-0047 > 30 kg. Re-usable Reusable Finger Sensor PC12 Patient Cable

0012-00-1099-02 All Re-usable Extension

2. Attach the PC12 Patient Cable (P/N 0012-00-1099-02) to the sensor and plug the other end of the patient cable into the SpO

connector (15)

NOTE: Do not place the sensor on an extremity with an invasive catheter or blood pressure cuff in place.

NOTE: Ensure proper routing of patient cable to avoid entanglement and/or strangulation.

CAUTION: When equipped with MASIMO

including MASIMO LNOP

PC12

Patient Cable. Use of other oxygen transducers may cause improper oximeter

SpO2,use only MASIMO®oxygen transducers

patient dedicated adhesive sensors and MASIMO

performance.

CAUTION: Tissue damage or inaccurate measurements may be caused by incorrect sensor

CAUTION: Excessive ambient light may cause inaccurate measurements. Cover the sensor site

with opaque material.

CAUTION: Inaccurate measurements may be caused by incorrect sensor application or use;

significant levels of dysfunctional hemoglobins, (e.g., carboxyhemoglobin or methemoglobin); or intra-vascular dyes such as indocyanine green methylene blue; exposure to excessive illumination, such as surgical lamps (especially ones with a xenon light source), bilirubin lamps, fluorescent lights, infrared heating lamps, or direct sunlight; excessive patient movement; venous pulsations; electro-surgical

1-40 Accutorr Plus Service Manual

Revised 06/19/01

Chapter 1, Operation

interference; and placement of a sensor on an extremity that has a blood pressure cuff, arterial catheter, or intra-vascular line.

CAUTION: In certain situations in which perfusion and signal strength are low, such as in

patients with thick or pigmented skin, inaccurately low SpO

readings will

result. Verification of oxygenation should be made, especially in preterm infants and patients with chronic lung disease, before instituting any therapy or intervention.

CAUTION: Many patients suffer from poor peripheral perfusion due to hypothermia,

hypovolemia, severe vasoconstriction, reduced cardiac output, etc. These symptoms may cause a loss in vital sign readings.

CAUTION: The site should be checked at least every eight (8) hours (every four (4) hours

with the Adult re-usable finger sensor). Ensure proper adhesion, skin integrity, and proper alignment. Nail polish and fungus may effect readings. Exercise extreme caution with poorly perfused patients. Skin erosion and pressure necrosis can be caused when sensors are not frequently monitored. Assess the site every two (2) hours with poorly perfused patients.

CAUTION: If the sensor or patient cable is damaged in any way, discontinue use

immediately. To prevent damage do not soak or immerse the sensor in any liquid solution. Do not attempt to sterilize.

3. The digital SpO

value and SpO2Pulse Rate will be displayed on the SpO2and Pulse

Rate LED’s.

4. If desired, adjust the beep volume. See Section 3.7, “Setting the Alarm Volume and Beep Volume”, for details on adjusting the beep volume.

1.3.10.3.1 MASIMO

MASIMO

provides a family of sensors suitable for a wide variety of clinical settings and

Sensors and Patient Cable

patients. Specific sensors have been developed for neonates, infants, children, and adults. All sensors are indicated for continuous non invasive monitoring of arterial oxygen

saturation (SpO

) and pulse rate. The LNOP



•DCI Adult Re-usable Finger Sensor can

also be used for “spot check” applications if needed. All sensors are intended for “single-patient use only” except for the LNOP



•DCI Adult “Re-usable” Finger Sensor.

A. Selecting a Sensor

B. Cleaning and Re-use

The sensor may be reattached to the same patient if the emitter and detector windows are clear and the adhesive still adheres to the skin. The adhesive can be partially rejuvenated by wiping with an alcohol wipe and allowing the sensor to thoroughly air dry prior to replacement on the patient.

Accutorr Plus Service Manual 1-41 Chapter 1, Operation

Revised 06/19/01

C. Performance Considerations

To insure optimal performance, use an appropriate sensor, apply it as directed, and observe all warnings and cautions.

Special Features

D. Automatic Calibration

E. Oximetry Sensitivity Mode and Post Averaging Time

The Accutorr Plus sensitivity mode for SpO

is set to normal and the averaging of the

saturation, pulse rate, and signal strength measurements for SpO

is set to 8 seconds

1-42 Accutorr Plus Service Manual

Added 02/15/00

Chapter 1, Operation

1.3.12 RECORDER (optional)

The Accutorr Plus can provide a permanent record of patient data using the PRINT key (12). There are two print modes available. They are Continuous Print or Request Print. In the Continuous Print mode the printer will print each time there is a valid NIBP or Temperature measurement. In the Request Print mode the printer will print all of the stored information for the displayed patient.

1. Attach the Recorder Module as shown in section 1.3.17.

2. Press the PRINT key (12) (1 beep tone) to generate a Request printing. The recorder

will print all stored measurements for the currently displayed patient. Press the PRINT key (1 beep tone) while a printing is in progress, to stop the printing.

3. Press and hold the PRINT key (12) (2 beep tones, approx. 3 seconds) to switch the print mode between Continuous and Request. When in the Continuous mode the Print LED (13) is illuminated.

NOTE: When a printing is in progress and the PRINT key is pressed or Room Number and/or Bed Letter is changed, the printing will stop.

M/D/Y 11/25/97 02a

HH:MM SYS DIA MAP

15:25[122][ 88][ 99]

BPM SPO2

[S 64][ 99] P 98.9

HH:MM SYS DIA MAP

15:20 120 [ 88] 99

BPM SPO2

S 64 99 P 98.9

HH:MM SYS DIA MAP

15:15 120 88 99

BPM SPO2

S64 99 ----

HH:MM SYS DIA MAP

15:10 120 [ 88] 99

BPM SPO2

[S 64] 99 P 98.9

HH:MM SYS DIA MAP

15:05 [120] 88 99

BPM SPO2

S 64 99 P 98.9

Figure 1-18 Recorder Strip Sample

EF/C

The Date and Room/Bed is printed for each group of measurements.

Parameter Headings are repeated for each line of measurements.

Brackets are printed around measurements that caused an alarm violation.

P or I is printed with the Temp measurement, indicating the temperature was acquired from a Predictive or the AccuTemp IR thermo meter.

When no i nformation is available for a particular parameter, dashes are printed.

SorNisprintedwiththePulseRate(BPM) measurement, indicating the Pulse Rate was ac

uired fr om SpO2 or NIBP.

When the Predictive thermometer is used, “P” is printed next to the temperature measurement. When the IR thermometer is used, “I” is printed next to the temperature measurement. When NIBP is used to obtain a pulse rate measurement, “N” is printed next to the pulse rate measurement. When SpO

is used to obtain a pulse rate measurement, “S” is printed next to the pulse rate measurement. If data is not available for any given parameter, “—-” is printed under that parameter. Parameter values that violated alarm limits are indicated by the brackets “[ ]”.

1-46 Accutorr Plus Service Manual

Revised 02/15/00

Chapter 1, Operation

1.3.13 HOW TO SET THE CLOCK (Date and Time)

The clock can be set during normal operation or in the User Configuration. See section

1.3.15, for details on entering the User Configuration. The Timer/Temp key (32), Interval/Elap. Time/Temp Display (33), and the Up and Down arrow keys (27 & 28) are used to set the time and date. PRECAUTION: Changing any part of the time or date will cause all stored patient information (trend data) to be permanently erased. Viewing the time or date does NOT cause data to be erased.

1. Press and hold the Timer/Temp key (32) (2 beep tones, approx. 6 seconds). The hour digit only displays.

2. Press the Patient Info. Up or Down Arrow key (27 or 28) to change the number. NOTE: The Accutorr Plus always displays time in a 24 hour format.

3. Press the Timer/Temp key (32) to activate the minute display.

4. Press the Patient Info. Up or Down Arrow key (27 or 28) to change the number. Continue pressing the Timer/Temp key and the Arrow keys to set the month, day, and year (in that order).

5. After the year has been selected, the next press of the Timer/Temp key (32) exits the clock set mode and enters the new information.

To cancel a changed value while that value is still displayed, press the DEFAULTS key (14) for less than 3 seconds.

TIMER/TEMP

INTERVAL TEMPELAP.TIME

ALARMS

MUTE

TIMER/TEMP

INTERVAL TEMPELAP. TIME

ALARMS

Hour Display

Press and hold to enter the clock set mode. Set hour,

SET

ALARMS

Press to Change

then press again to set the minute.

Figure 1-19 - Setting the Hour

Minute Display

After the time and date have been set, press

MUTE

SET

ALARMS

Press to Change

to exit the cloc k set mode.

Figure 1-20 - Setting the Minute

If the TIMER/TEMP or Arrow keys have not been pressed for 15 seconds, the Accutorr Plus returns to normal operation and saves any Time/Date changes.

When the clock is displayed, it displays real-time (current time). When the clock is displayed while viewing previous data, frozen time is displayed. When frozen time is displayed, the colon between the hours and minutes is illuminated continuously. When real-time is displayed the colon between the hours and minutes flashes.

Accutorr Plus Service Manual 1-47 Chapter 1, Operation

Revised 02/15/00

1.3.14 BATTERY OPERATION

When the Accutorr Plus is powered from the battery, the Battery Indicator (17) is illuminated continuously.

To conserve power, most displays will blank (time out) at user selected times. The LCD illumination time out can be set between 3 and 15 minutes. The LED displays time out can be set between 5 and 60 minutes. Since the Accutorr Plus can be powered from either an AC or DC source, the user configuration allows the setting of separate times for each type of power source. See User Configuration, section 3.15 for more information on setting the time out minutes.

When the battery charge is low, but not below the cutoff voltage, the battery LED will flash and the recorder will not operate. When the LED begins to flash on Sealed lead acid units, approximately 30 minutes of battery time remain for the Accutorr Plus NIBP, 20 minutes for the Accutorr Plus NIBP with Trend Screen and 10 minutes for the Accutorr Plus NIBP with Trend Screen and SpO approximately 10 minutes of low battery warning time.

When the battery charge drops below the cutoff voltage the Accutorr Plus will automatically turn off. Patient information will be retained for later use.

Battery run time for the Accutorr Plus NIBP is approximately 5 hours with a Sealed lead acid battery or 8 hours with a Lithium ion battery using a new fully charged battery at 25EC with a NIBP measurement taken every 5 minutes and the recorder not in use. Battery run time for the Accutorr Plus NIBP with Trend Screen is approximately 3 hours for a Sealed lead acid battery or 8 hours for a Lithium ion battery using a new fully charged battery at 25EC with a NIBP measurement taken every 5 minutes and the recorder not in use. Battery run time for the Accutorr Plus NIBP with Trend Screen and Datascope SpO

is approximately 1.5 hours for a Sealed lead acid battery or 3.5 hours for a

Lithium ion battery using a new fully charged battery at 25EC with a NIBP measurement taken every 5 minutes continuous SpO run time for the Accutorr Plus NIBP with Trend Screen and Masimo or Nellcor SpO approximately 2 hours for a Sealed lead acid battery or 4.5 hours for a Lithium ion battery using a new fully charged battery at 25EC with a NIBP measurement taken every 5 minutes continuous SpO

measurement and the recorder not in use.

. Units with Lithium ion batteries will provide

measurement and the recorder not in use. Battery

The Accutorr Plus automatically recharges the battery, when required, when the unit is plugged into an AC receptacle. Maximum battery recharge time is 8 hours for Sealed lead acid or 2 hours for Lithium ion.

CAUTION: To avoid loss of patient data (trend), do not replace the battery unless the Accutorr Plus is connected to an AC receptacle. Hospital defaults and the time are unaffected by battery replacement.

1-48 Accutorr Plus Service Manual

Revised 12/20/00

Chapter 1, Operation

1.3.15 USER CONFIGURATION

The User Configuration Mode allows the operator the opportunity to set custom default settings. These custom default settings will be used each time the Accutorr Plus is turned on. Once the User Configuration Mode is entered, the only way to exit this mode is to turn off the Accutorr Plus using the ON/STANDBY key (19).

1. To enter the User Configuration Mode, press and hold the DEFAULTS key (14) while turning the unit ON. Release after the third beep.

2. To select a User Configuration item number, press the ROOM/BED key (24) to display the desired User Configuration Number in the ROOM and BED displays (25 & 26). See table below for User Configuration Numbers. The current default setting for that item displays.

3. Press the NIBP START key (38) to be able to change the default value. The default setting flashes.

4. Press the Patient Info. Up or Down Arrow key (27 or 28) to change the default setting.

5. Press the START NIBP key (38) to enter the changed default setting.

6. Repeat step 2 for additional choices.

The following table list the functions that can be configured in the user configuration mode.

User Configuration Number

1a Clock Set Setting the date and time. See

1b Date Format Set the format as M/D/Y (1231)*

2 Reserved for future

3 Text / Symbols Set the description of which alarm

4 Patient Size Set the default patient size to be

5a Time Out, LEDs

5b Time Out, LEDs

*1231 represents 12 months/31 days and 3112 represents 31 days/12 months.

Function Description Factory Default

section 1.3.13 for details on setting the clock.

or D/M/Y (3112)*

use.

limit is being set, Hi and Lo or the graphic . Also change the Interval of OFF to ——.

Adult, Pediatric and Neonate.

Set how long the numeric and LCD Characters when unit is powered from AC mains.

and LCD Characters when unit is powered from the internal battery.

information is displayed, when no

keys have been pressed, in the

LEDs and LCD before they are

blanked to conserve energy. The

choices are: 5, 15, 30 or 60

minutes. NOTE: The information

is not erased.

Set how long the numeric informa

tion is displayed, when no keys

have been pressed, in the LEDs

and LCD before they are blanked

to conserve energy. The choices

are: 5, 15, 20 or 30 minutes.

NOTE: The information is not

erased.

D/M/Y (3112)*

The word “Hi” which will then use Hi and Lo as the indicators. OFF for Interval. Adult

15 minutes

5 minutes

Accutorr Plus Service Manual 1-49 Chapter 1, Operation

Revised 02/15/00

User Configuration Number

5c Time Out, Light

5d Time Out, Light

Function Description Factory Default

Set how long the light will stay in the LCD when the unit is powered from AC mains.

on, when no keys are pressed, in

the LCD. The choices are: 3, 5, 10

or 15 minutes.

Set how long the light will stay in the LCD when the unit is powered from the

on, when no keys are pressed, in

the LCD. The choices are: 3, 5, 10

or 15 minutes. internal battery.

6a Adult Initial

Inflation Pressure

Set the initial cuff inflation pressure

for an adult size patient. The

choices are: 100 to 260 mmHg at

5 mmHg increments.

6b Pediatric Initial

Inflation Pressure

Set the initial cuff inflation pressure

for a pediatric size patient. The

choices are: 60 to 180 mmHg at 5

mmHg increments.

6c Neonate Initial

Inflation Pressure

See the initial cuff inflation

pressure for a neonate size patient.

The choices are: 40 to 120 mmHg

at 5 mmHg increments.

7 Adaptive Inflation Choices are ON or OFF. If User

Configuration #3 is set to display

graphics, the choices are -l- or -O-.

8 Interval Setting Set the NIBP Interval Time. The

choices are: OFF (or ——), Cont.

(Continuous), 1, 2.5, 5, 10, 15,

20, 30, 60, 120, and 240 minutes.

9a Adult Alarm

Limits

Set the default alarm limit values for

an Adult size patient. See Section 1.3.5

for details on setting alarm limits.

9b Pediatric Alarm

Limits

Set the default alarm limit values

for a Pediatric size patient. See

Section 1.3.5 for details on setting

alarm limits.

9c Neonate Alarm

Limits

See the default alarm limit values

for an Neonate size patient. See

Section 1.3.5 for details on setting

alarm limits.

10a Alarm Volume Set the volume of an alarm signal.

The choices are: 1, 2, 3,4&5.5is

the loudest.

10b SpO

Volume Set the volume of the SpO2beep.

The choices are: Off (or ——), 1,

2,3,4&5.5istheloudest.

11 Continuous Print Choices are ON or OFF. If User

Configuration #3 is set to display

graphics, the choices are -l- or -O-.

12 Reset to Factory

Defaults

To change all of the User

Configuration items back to the

Factory Defaults, while in User

Config. #12, press and hold the

START NIBP key for 3 seconds.

3 minutes

180 mmHg

140 mmHg

100 mmHg

OFF (or ——)

OFF, except SpO which is 86

OFF

low

1-50 Accutorr Plus Service Manual

Revised 02/15/00

Chapter 1, Operation

1.3.16 STATUS AND ERROR CODES

The Accutorr Plus uses the various displays on the front panel to display the operational status. Status and error codes listed below can generally be resolved by the user however, some error codes, which are marked with an asterisk (*), may require resolution by a qualified technical service person. These codes with their descriptions are listed on the back of the Quick Reference card. NOTE: Status codes 8810 through 8858 can be cleared from the Room and Bed displays by pressing the Room/Bed key (24).

Status and Error Code Table

TYPE CODE DESCRIPTION REASON

NIBP 8810 Retry - Unable to

Measure

8811 Retry - Pump

Higher

8812 Stop - Cuff

Overpressure

8813 Stop - Unable to

Measure

TEMP (PTM)

8830 Check Probe Tissue contact may have been lost. 8831 Replace Probe Defective probe or connection. 8832 Battery Low The 9V battery needs replacement.

SpO

8850 No Sensor No sensor connected.

8851 Sensor Off Sensor not on patient.

8852 Interference Interference on signal.

8853 Pulse Search Unit cannot find signal. (Nellcor SpO

8854 Weak Pulse Weak pulse detected.

8855 No Pulse No pulse detected. (Datascope SpO 8856 Check Sensor Sensor problem.

8857 PR<30 Pulse rate is less than 30 bpm. (Datascope SpO 8857 PR<21 Pulse rate is less than 21 bpm. (Nellcor SpO 8857 PR<26 Pulse rate is less than 26 bpm. (Masimo SpO 8858 PR>249 Pulse rate is greater than 249 bpm. (Nellcor SpO 8858 PR>239 Pulse rate is greater than 239 bpm. (Masimo SpO 8858 PR>250 Pulse rate is greater than 250 bpm. (Datascope SpO

SYSTEM 984* NIBP Hardware Failure NIBP A/D failure detected.

985* NIBP Overpressure

Circuit not Programmed

986* NIBP Overpressure

Circuit not Tracking

987* Stop - Hardware

Overpressure 988* TEMP Bad Calibration Thermometer needs calibration. 990* TEMP Illegal Mode Thermometer switch is set wrong. 991* TEMP Module Failed Thermometer internal failure. 995* SpO 996* SpO

Uncalibrated SpO2fails calibration check.

Failure SpO2failed self-test.

Motion artifact, cycle time-out, weak pulsations or no pulsa

tions. A triple beep tone is generated. Insufficient cuff pressure. A triple beep tone is generated.

Excessive cuff pressure detected by the software. A triple beep tone is generated.

4 successive measurement attempts failed. A triple beep tone is generated.

(Datascope and Masimo SpO

only)

Module will report

“Pulse Search” -8853- when the sensor is not on the patient.)

(Datascope and Masimo SpO

only)

The overpressure circuit is not set to the current patient size.

The two pressure transducers are not tracking each other.

Excessive cuff pressure detected by hardware over-pressure sen sor. A triple beep tone is generated.

Accutorr Plus Service Manual 1-51 Chapter 1, Operation

Revised 02/15/00

1.3.17 HOW TO ATTACH OPTIONAL THERMOMETER and RECORDER MODULES

The Accutorr Plus can be configured with a Recorder Module and Thermometer Module.

To Attach the Recorder Module:

Looking at the rear panel of the unit, the Recorder Module is attached to the right side of the Accutorr Plus.

1. Insure that the Accutorr Plus is OFF.

2. Insert the tab on the Recorder Module into the Recorder Module Connector (48) on

the Accutorr Plus. Push firmly to seat properly.

3. Use the 2 screws provided to secure the Recorder Module to the Accutorr Plus.

To Attach the Thermometer Module:

Looking at the rear panel of the unit, the Thermometer Module is attached to the left side of the Accutorr Plus.

1. Insure that the Accutorr Plus is OFF.

2. Insert the tab on the Thermometer Module into the Thermometer Module Connector

(42) on the Accutorr Plus. Push firmly to seat properly.

3. Use the 2 screws provided to secure the Thermometer Module to the Accutorr Plus.

AccuTemp Thermometer

Screw

Tab

Recorder Module

Accutorr Plus with Trend Screen and SpO

Figure 1-21 Attaching Optional Modules

--OR--

Tab

Module

Screw

Predictive Thermometer Module

1-52 Accutorr Plus Service Manual

Revised 02/15/00

Chapter 1, Operation

1.3.18 PLACEMENT OF THE QUICK REFERENCE CARD

The Quick Reference card provides abbreviated descriptions of front panel keys on one side, and on the other side provides descriptions of the status codes. To attach the Quick Reference card, thread the NIBP hose through the two holes in the card.

NIBP

PATIENT

Choose Patient Size

SETUP

Start NIBP

START NIBP

Measurement

Stop NIBP Measurement

DEFLATE

Deflate Cuff

INTERVAL

Set Interval

TIMER/TEMP

Interval, ElapsedTime or Temperature

ALARMS

SET

Choose a Parameter,

ALARMS

use arrowsto change

MUTE

Thread the NIBP

hose through the

2 holes in the Quick

Reference Card.

Silence Alarm

PATIENT INFO.

ROOM

Activates Room/Bed

BED

mode, use arrows to change

DATA

Display PriorM easurement(s)

SCAN

To erase mostrecent measurement,

DELETE

pressDATASCAN,thenpressand

INFO

hold DELETEINFO for 1 beep

ACCUTORR PLUS WITHTREND

Switch Trend/MenuDisplay

SELECT

Select Para meter

Press to print/stopprint

Press and holdfor 2 beeps to

DEFAULTS

restore all hospitalsettings

Up/ Increase

Down/ Decrease

Figure 1-22 Placement of Quick Reference Label

NOTE: The card shown in figure 1-22 is a sample to show how to attach the card. The actual card may differ.

Accutorr Plus Service Manual 1-53 Chapter 1, Operation

Revised 02/15/00

1.3.19 PLACEMENT OF RECORDER PAPER LOADING LABEL

The Recorder Paper Loading label is designed to be placed on the recorder module. Attach label as shown in the figure below.

Drucken Imprimer Stampa

Imprimir

Figure 1-23 Placement of Recorder Paper Loading Label

1-54 Accutorr Plus Service Manual

Revised 02/15/00

Chapter 1, Operation

2.0 THEORY OF OPERATION

CONTENTS OF THIS CHAPTER ..........................Page

2.1 Block Diagrams ......................................2-1

2.2 Detailed Circuit Description.............................2-2

The Theory of Operation provides block diagrams of major operational circuits, an overview of each circuit board and functional descriptions of the major sections on that board. The information presented is intended to assist qualified service personnel to isolate faults to the lowest functional sub assembly and replacement of the same.

2.1 BLOCK DIAGRAMS

The system level block diagram illustrates the major functional modules and their interdependence. More detailed diagrams for particular functional modules are provided within the Theory of Operation.

Block Diagrams

Page

Interconnect Diagrams 2-3 LED/CPU Board Block Diagram 2-9 NIBP Block Diagram 2-19 Recorder Module Control Logic Block Diagram 2-20 Predicative Temperature Module Block Diagram 2-21 Datascope SpO

Block Diagram 2-24

Communication Board Block Diagram 2-27 LCD inverter Module Block Diagram 2-28 Nellcor Nellcor Masimo

MP304 Block Diagram 2-29

Interface Board Block Diagram 2-30

Interface Board Block Diagram 2-32

Tone Processor Board Block Diagram 2-34

Accutorr Plus Service Manual 2-1 Chapter 2 - Theory of Operation

Revised 12/20/00

2.2 DETAILED CIRCUIT DESCRIPTIONS

This section of the manual describes the operation of each circuit block. Refer to the schematic diagrams in Chapter 5.

Included are descriptions for the following Circuit Board Assemblies:

Circuit Descriptions

Page

2.2.1 LCD/CPU Module 2-9

2.2.2 NIBP Module, Linear Bleed 2-17

2.2.3 Recorder Module 2-20

2.2.4 Predictive Thermometer Module 2-21

2.2.5 SpO

Module 2-22

2.2.6 Main Power Supply 2-25

2.2.7 Communication Board 2-26

2.2.8 LCD Inverter Module 2-28

2.2.9 Nellcor

2.2.10 Nellcor

2.2.11 Masimo Set

2.2.12 Masimo

MP304 Board 2-29

Interface Board 2-30

Technology 2-31

Interface Board Theory of Operation 2-32

2.2.13 Tone Processor Board Theory of Operation 2-34

2-2 Accutorr Plus Service Manual

Revised 12/20/00

Chapter 2 - Theory of Operation

Accutorr Plus with Datascope SpO2 or without SpO2 Interconnect Diagram

Notes

1. Detailed functional descriptions are found in the Theory of Operations section

2. Functional blocks with dashed outlines are optional features. (---)

3. Shaded blocks are considered "black box" devices

12 Volt

NIBP Pump

+12 V

Rtn. Switched

N/C

Filter Board

0670-00-0584-03

1 2 3 4

+12 V Filt

P Gnd

Pump Rtn

+12 V Nfilt

1 2 3

DC Power Supply 0014-00-0184 (SLA) OR 0014-00-0225 (Li-Ion)

+12-15 On

Off / On

Charger Off

1 2 3

Thermister

Stdby

AC On

+12

A Gnd

-15

Pwr Gnd

3 2

4A/250

5x20mm

D Gnd

+15

Batt. Fuse

D Gnd

+5 V

1234567891011

1 2 3 4 5

AC Gnd

AC Neut AC Hot

10.8 V Battery Lithium - Ion

0146-00-0069

12 V Battery

Lead Acid

0146-00-0043

PGND

+5VP

+5V

DREQ

RUN

HOME

PGND

RESET

Recorder circuit board 0670-00-0583

WR Recd

DGnd

B Fast*

L Ven*

1234567891011

Dump*

1234567891011

Speaker

Tone Processor Board

0670-00-1134

Speaker in

Speaker Rtn

+ 5 vdc

123

Tone Processor Board shown but not used in all versions

Electro luminescent panel lite

LCD Display

CAPTIVE CABLE

100 VAC

100 VAC return

1 2 3 4

0670-00-0649

100 VAC

LCD Inverter

0014-00-0180

Module

0160-00-0034

CAPTIVE CABLE

+5 V

Bus, <7>

D Gnd

Bus, <4>

Bus, <5>

Bus, <6>

Bus, <2>

Bus, <3>

Bus, <0>

Bus, <1>

Reset*

D Gnd

A<1>

WR_LCD*

View Angle Control

RD_LCD*

CS_LCD*

+5 V

D Gnd

Chassis Gnd

1234567891011

3 2 1

LCD lite Off

P Gnd +12 V

D Gnd

P Gnd

D Gnd

123

D Gnd

+5 V

+5 V Recorder

NIBP Board 0670-00-0584-02

Ser. Data In

+5 V

+5 V Recorder

Ser. Clock

AD Clear Send*

EOC

EL Lite Off*

Ser. Data Out

n/c

VBULK, 9 to 17 VDC

-15 V

AC Connected*

+12, -15 On*

Charger Off*

A Gnd

Off / On*

+15 V

Gain 1

Clear*

Gain 0

Neo

Overpr. Det*

Ped

Pump

S Gain*

CPU / LED Board 0670-00-0650-03 for units with SpO2 0670-00-0650-04 for units Without SpO2

Ext_RTS

Ext_RXD

1234567891011

+5 V

D Gnd

CTS

+5 V

RTS

9 to 17 VDC Bulk

D Gnd

Nurse Call

CSTAT*

1234567891011

External Communication

Ext_CTS

Ext_TXD

Circuit board 0670-00-0661-01

D Gnd

Ext_RXD

Ext_TXD

Ring

Sleeve

Tip

Datascope

Communication

Connector

Three circuit phone jack

D Gnd

Nurse Call

Ext_CTS

8,9

9 pin female DIN

+12 VDC

Ext_RXD

Ext_RTS

Ext_TXD

456

External

Interface Conn.

282930

Hi_Low*

Address Bus, A2

No Connection

LCD_Unit

KEYPADS:

Units with Trend display, and No SpO2: 0331-00-0102

Units with Trend display, and SpO2: 0331-00-0103

Units without Trend display, and No SpO2: 0331-00-0104

ON / OFF SW*

D Gnd

KEY D1

KEY D0

KEY D2

KEY D3

KEY D5

KEY D4

KEY D6

ACON LED

KEY 2

KEY 0

KEY D7

ACON

KEY 1

GRAPHIC OVERLAYS:

0330-00-0026-XX

0330-00-0027-XX

0330-00-0025-XX

Display Bus, D5

Display Bus, D6

WR_LED3*

Display Bus, D7

Display Bus, D3

Display Bus, D4

1234567891011

Display Bus, D2

Display Bus, D1

Display Bus, D0

1234567891011

Digital Ground

HRST

Digital Ground

RXD

TXD

+5 In

Datascope

SpO2 Circuit

Board

0670-00-0593-03

Det. Anode

Det. Shield

Det. Cathode

Probe ID Ret.

Probe ID

SpO2 Sensor receptical

123456789

Analog Ground

+15 In

-15 In

123456789

Red Drive

IR Drive

LED Common

19,20

11,12

15,16

13,14

17,18

Receiving photocell

9,10

0670-00-0585

part of IR cradle assembly

0997-00-0426

Transmit LED

Infrared hand

held device.

Pred. Temp.

+5 V

D. Gnd

Infrared Temp

11,12

15,16

19,20

5,6

7,8

Infrared

Interface Board

Magnet

Reed Sw.

Thermometer,

13,14

17,18

3,4

1,2

Thermometer,

Security

9 V Alkaline Batt.

Batt. in

handpiece

Temp-TXD

Temp-RXD

D. Gnd

3,4

5,6

9,10

7,8

1,2

11,12

15,16

19,20

13,14

17,18

0670-00-0582

9,10

Thermometer,

Predictive,

circuit board

3,4

5,6

1,2

7,8

Batt. in main housing

9 V Alkaline Batt.

Battery shown but not used in all versions

Batt. Grd

Therm. Rtn

Temp. Probe receptacle

0012-00-0953 WITH 9V battery or 0012-00-1335 WITHOUT 9V battery

Accutorr Plus with Datascope SpO and without SpO

Block Diagram

Revised 12/20/00

2-3

+5 Therm

Grd

Accutorr Plus with NELLCOR SpO2 or without SpO2 Interconnect Diagram

Notes

1. Detailed functional descriptions are found in the Theory of Operations section

2. Functional blocks with dashed outlines are optional features. (---)

3. Shaded blocks are considered "black box" devices

12 Volt

NIBP Pump

+12 V

Rtn. Switched

N/C

Filter Board

0670-00-0584-03

1 2 3 4

+12 V Filt

P Gnd

Pump Rtn

+12 V Nfilt

1 2 3

DC Power Supply 0014-00-0184 (SLA) OR 0014-00-0225 (Li-Ion)

+12-15 On

Off / On

Charger Off

1 2 3

Thermister

Stdby

AC On

+12

A Gnd

-15

Pwr Gnd

3 2

4A/250

5x20mm

D Gnd

+15

Batt. Fuse

D Gnd

+5 V

1234567891011

1 2 3 4 5

AC Gnd

AC Neut AC Hot

10.8 V Battery Lithium - Ion

0146-00-0069

12 V Battery

Lead Acid

0146-00-0043

PGND

+5VP

+5V

DREQ

RUN

HOME

PGND

RESET

Recorder circuit board 0670-00-0583

WR Recd

DGnd

B Fast*

L Ven*

1234567891011

Dump*

1234567891011

Speaker

Tone Processor Board

0670-00-1134

Speaker Rtn

Speaker in

+5 vdc

123

Tone Processor Board shown but not used in all versions

Electro luminescent panel lite

LCD Display

CAPTIVE CABLE

100 VAC

100 VAC return

1 2 3 4

0670-00-0649

100 VAC

LCD Inverter

0014-00-0180

Module

0160-00-0034

CAPTIVE CABLE

+5 V

Bus, <7>

D Gnd

Bus, <4>

Bus, <5>

Bus, <6>

Bus, <2>

Bus, <3>

Bus, <0>

Bus, <1>

Reset*

D Gnd

A<1>

WR_LCD*

View Angle Control

RD_LCD*

CS_LCD*

+5 V

D Gnd

Chassis Gnd

1234567891011

3 2 1

LCD lite Off

P Gnd +12 V

D Gnd

P Gnd

D Gnd

123

D Gnd

+5 V

+5 V Recorder

NIBP Board 0670-00-0584-02

Ser. Data In

+5 V

+5 V Recorder

Ser. Clock

AD Clear Send*

EOC

EL Lite Off*

Ser. Data Out

n/c

VBULK, 9 to 17 VDC

-15 V

AC Connected*

+12, -15 On*

Charger Off*

A Gnd

Off / On*

+15 V

Gain 1

Clear*

Gain 0

Neo

Overpr. Det*

Ped

Pump

S Gain*

CPU / LED Board 0670-00-0650-03 for units with SpO2

6,8,10

0670-00-0650-04 for units Without SpO2

Ext_RTS

Ext_RXD

1234567891011

+5 V

D Gnd

CTS

+5 V

RTS

9 to 17 VDC Bulk

D Gnd

Nurse Call

CSTAT*

1234567891011

External Communication

Ext_CTS

Ext_TXD

Circuit board 0670-00-0661-01

D Gnd

Ext_RXD

Ext_TXD

Ring

Sleeve

Tip

Datascope

Communication

Connector

Three circuit phone jack

D Gnd

Nurse Call

Ext_CTS

8,9

9 pin female DIN

+12 VDC

Ext_RXD

Ext_RTS

Ext_TXD

456

External

Interface Conn.

Hi_Low*

Address Bus, A2

No Connection

LCD_Unit

KEYPADS:

Units with Trend display, and No SpO2: 0331-00-0102

Units with Trend display, and NELLCOR SpO2: 0331-00-0108

Units without Trend display, and No SpO2: 0331-00-0104

ON / OFF SW*

D Gnd

KEY D1

KEY D0

KEY D2

KEY D3

KEY D5

KEY D4

KEY D6

ACON LED

KEY 2

KEY 0

KEY D7

ACON

KEY 1

GRAPHIC OVERLAYS:

0330-00-0026-XX

0330-00-0027-XX

0330-00-0025-XX

Display Bus, D5

Display Bus, D6

WR_LED3*

Display Bus, D7

Display Bus, D3

Display Bus, D4

1234567891011

Display Bus, D2

Display Bus, D1

Display Bus, D0

1234567891011

SpO2 gnd

SpO2-RX

SpO2RST*

6,8,10

NELLCOR SpO2 interface board 0670-00-0675

grnds 2,3,5,

Male / Fem. Header

12,14

4 7 8 9 10 13

NELLCOR SpO2 Circuit Board MP304

0671-00-0162

8 2

Detector

Inner shield

Dect. Cath.

7 14 6 1 28 9 13

NELLCOR SpO2

Sensor Receptacle

All other pins N/C

LED -

LED +

Rcal

Rcal Rtn.

4579

SpO2-TX

4579

Out. shield

19,20

17,18

Receiving photocell

Transmit LED

11,12

15,16

0997-00-0426

7,8

13,14

9,10

Interface Board

0670-00-0585

part of IR cradle assembly

Reed Sw.

Thermometer,

Infrared hand

held device.

Pred. Temp.

D. Gnd

Infrared Temp

15,16

19,20

5,6

Infrared

Magnet

13,14

17,18

3,4

1,2

Thermometer,

Security

9 V Alkaline Batt.

Batt. in

handpiece

Temp-TXD

Temp-RXD

+5 V

11,12

9,10

7,8

D. Gnd

3,4

5,6

1,2

11,12

15,16

19,20

13,14

17,18

0670-00-0582

9,10

Thermometer,

Predictive,

circuit board

3,4

5,6

7,8

Batt. in main housing

Therm. Rtn

Temp. Probe receptacle 0012-00-0953 WITH 9V battery or 0012-00-1335 WITHOUT 9V battery

Accutorr Plus with NELLCOR SpO and without SpO

Block Diagram

Revised 12/20/00

Batt. Grd

+5 Therm

2-4

1,2

9 V Alkaline Batt.

Battery shown but used in all versions

Grd

Accutorr Plus with Masimo SpO2 or without SpO2 Interconnect Diagram

Notes

1. Detailed functional descriptions are found in the Theory of Operations section

2. Functional blocks with dashed outlines are optional features. (---)

3. Shaded blocks are considered "black box" devices

12 Volt

NIBP Pump

+12 V

Rtn. Switched

N/C

Filter Board

0670-00-0584-03

1 2 3 4

+12 V Filt

P Gnd

Pump Rtn

+12 V Nfilt

1 2 3

DC Power Supply 0014-00-0184 (SLA) OR 0014-00-0225 (Li-Ion)

+12-15 On

Off / On

Charger Off

1 2 3

Thermister

Stdby

AC On

+12

A Gnd

-15

Pwr Gnd

3 2

4A/250

5x20mm

D Gnd

+15

Batt. Fuse

D Gnd

+5 V

1234567891011

1 2 3 4 5

AC Gnd

AC Neut AC Hot

10.8 V Battery Lithium - Ion

0146-00-0069

12 V Battery

Lead Acid

0146-00-0043

PGND

+5VP

+5V

DREQ

RUN

HOME

PGND

RESET

Recorder circuit board 0670-00-0583

WR Recd

DGnd

B Fast*

L Ven*

1234567891011

Dump*

1234567891011

Speaker

Tone Processor Board

0670-00-1134

Speaker Rtn

Speaker in

+5 vdc

123

Tone Processor Board shown but not used in all versions

Electro luminescent panel lite

LCD Display

CAPTIVE CABLE

100 VAC

100 VAC return

1 2 3 4

0670-00-0649

0014-00-0180

100 VAC

LCD Inverter

Module

0160-00-0034

CAPTIVE CABLE

+5 V

Bus, <7>

D Gnd

Bus, <4>

Bus, <5>

Bus, <6>

Bus, <2>

Bus, <3>

Bus, <0>

Bus, <1>

Reset*

D Gnd

A<1>

WR_LCD*

View Angle Control

RD_LCD*

CS_LCD*

+5 V

D Gnd

Chassis Gnd

1234567891011

3 2 1

LCD lite Off

3 2 1

P Gnd +12 V

D Gnd

P Gnd

D Gnd

123

D Gnd

+5 V

+5 V Recorder

NIBP Board 0670-00-0584-02

Ser. Data In

+5 V

+5 V Recorder

Ser. Clock

AD Clear Send*

EOC

EL Lite Off*

Ser. Data Out

n/c

VBULK, 9 to 17 VDC

-15 V

AC Connected*

+12, -15 On*

Charger Off*

A Gnd

Off / On*

+15 V

Gain 1

Clear*

Gain 0

Neo

Overpr. Det*

Ped

Pump

S Gain*

CPU / LED Board 0670-00-0650-03 for units with SpO2

2,6,8,10

0670-00-0650-04 for units Without SpO2

Ext_RTS

Ext_RXD

1234567891011

+5 V

D Gnd

CTS

+5 V

RTS

9 to 17 VDC Bulk

D Gnd

Nurse Call

CSTAT*

1234567891011

External Communication

Ext_CTS

Ext_TXD

Circuit board 0670-00-0661-01

D Gnd

Ext_RXD

Ext_TXD

Ring

Sleeve

Tip

Datascope

Communication

Connector

Three circuit phone jack

D Gnd

Nurse Call

Ext_CTS

8,9

9 pin female DIN

+12 VDC

Ext_RXD

Ext_RTS

Ext_TXD

456

External

Interface Conn.

Hi_Low*

Address Bus, A2

No Connection

LCD_Unit

KEYPADS:

Units with Trend display, but No SpO2: 0331-00-0102

Units with Trend display, and Masimo SpO2: 0331-00-0108

Units without Trend display, and No SpO2: 0331-00-0104

ON / OFF SW*

D Gnd

KEY D1

KEY D0

KEY D2

KEY D3

KEY D5

KEY D4

KEY D6

ACON LED

KEY 2

KEY 0

KEY D7

ACON

KEY 1

GRAPHIC OVERLAYS:

0330-00-0026-XX

0330-00-0027-XX

0330-00-0025-XX

Display Bus, D5

Display Bus, D6

WR_LED3*

Display Bus, D7

Display Bus, D3

Display Bus, D4

1234567891011

Display Bus, D2

Display Bus, D1

Display Bus, D0

1234567891011

SpO2 gnd

2,6,8,10

Masimo SpO2 interface board 0670-00-0716

J 2

0012-00-1338

Masimo SpO2 Circuit Board MS-3

0671-00-0163

Inner shield

I R Cathode

Red Cathode

Anode

Cathode.

SpO2-TX

SpO2-RX

SpO2RST*

Key.

Outer Shield.

4579

Pred. Temp.

+5 V

D. Gnd

4579

19,20

11,12

15,16

13,14

17,18

Receiving photocell

9,10

0670-00-0585

part of IR cradle assembly

0997-00-0426

Infrared Temp

11,12

15,16

19,20

5,6

7,8

Infrared

Interface Board

13,14

17,18

3,4

1,2

Thermometer,

9,10

7,8

5,6

19,20

Security

Magnet

Transmit LED

Reed Sw.

Thermometer,

Infrared hand

held device.

handpiece

9 V Alkaline Batt.

Batt. in

0012-00-0953 WITH 9 V battery or 0012-00-1335 WITHOUT 9 V battery

Temp-TXD

Temp-RXD

D. Gnd

3,4

1,2

3,4

5,6

11,12

15,16

17,18

circuit board

0670-00-0582

7,8

13,14

9,10

Thermometer,

Predictive,

Batt. in main housing

Batt. Grd

+5 Therm

Therm. Rtn

Temp. Probe receptacle

1,2

9 V Alkaline Batt.

Battery shown but used in all versions

Grd

457 91011

Masimo SpO2 sensor receptacle Front Panel 0012-00-1344

All other pins N/C

Accutorr Plus with Masimo SpO and without SpO

Block Diagram

Revised 12/20/00

2-5

Notes

Accutorr Plus with Datascope SpO2 or without SpO2

1. Detailed functional descriptions are found in the Theory of Operations section

Wiring Diagram

2. Functional blocks with dashed outlines are optional features. (---)

3. Shaded blocks are considered "black box" devices

0012-00-1015

12 Volt

NIBP Pump

Filter Board

0670-00-0584-03

DC Power Supply

0014-00-0184 (SLA)

0012-00-0986

0014-00-0225 (Li-Ion)

Batt. Fuse

0012-00-0943

Li-Ion Batt. Cable 0997-00-0944

SLA Batt. Cable 0406-00-0754

Mains Input

0012-00-0941

10.8 V Battery Lithium - Ion

0146-00-0069

12 V Battery

Lead Acid

0146-00-0043

Speaker with Cable

0012-00-0257-05

Captive Cable, Soldered to CPU Circuit board.

Recorder circuit board 0670-00-0583

Captive Cable soldered to the Communication Circuit board

Communication

Connector

Three circuit phone jack

0012-00-1089

Electro luminescent panel lite

LCD Display Module

0160-00-0034

CAPTIVE CABLE

0012-00-0988

External Communication Circuit board 0670-00-0661-01

Captive Cable, Soldered to Communication Circuit board.

External

Datascope

Interface Conn.

0012-00-1090

9 pin female DIN

CAPTIVE CABLE

0670-00-0649

100 VAC

Hi Volt. Inverter

0014-00-0180

0012-00-0989

NIBP Board 0670-00-0584-02

0012-00-0944

CPU / LED Board 0670-00-0650-03 for units with SpO2 0670-00-0650-04 for units Without SpO2

Male / Female Header Connector

KEYPADS:

Units with Trend display, and No SpO2: 0331-00-0102

Units with Trend display, and SpO2: 0331-00-0103

Units without Trend display, and No SpO2: 0331-00-0104

GRAPHIC OVERLAYS:

0330-00-0026-XX

0330-00-0027-XX

0330-00-0025-XX

0012-00-1238

Datascope SpO2

Circuit Board

0670-00-0593-03

Datascope SpO2 sensor receptacle Front Panel

J 3

0012-00-1223

0670-00-0585

part of IR cradle assembly

0997-00-0426

Receiving photocell

Security

Magnet

Reed Sw.

Transmit LED

Infrared hand

held device.

Captive Cable, Soldered to CPU Circuit board.

Thermometer,

Infrared

Interface Board

9 V Alkaline Batt.

Thermometer,

Batt. in

handpiece

Tone Processor Board

0670-00-1134

Tone Processor Board shown but not used in all versions.

0670-00-0582

Batt. in main housing

9 V Alkaline Batt.

Thermometer,

Predictive,

circuit board

Battery shown but not used in all versions

Temp. Probe receptacle 0012-00-0953 WITH 9 V battery or 0012-00-1335 WITHOUT 9V battery

Accutorr Plus with Datascope SpO or without SpO Wiring

Block Diagram

Revised 12/20/00

2-6

Notes

Accutorr Plus with NELLCOR SpO2 or without SpO2

1. Detailed functional descriptions are found in the Theory of Operations section

Wiring Diagram

2. Functional blocks with dashed outlines are optional features. (---)

3. Shaded blocks are considered "black box" devices

0012-00-1015

12 Volt

NIBP Pump

Filter Board

0670-00-0584-03

DC Power Supply

0014-00-0184 (SLA)

0012-00-0986

0014-00-0225 (Li-Ion)

Batt. Fuse

0012-00-0943

Li-Ion Batt. Cable 0997-00-0944

SLA Batt. Cable 0406-00-0754

Mains Input

0012-00-0941

10.8 V Battery Lithium - Ion

0146-00-0069

12 V Battery

Lead Acid

0146-00-0043

Speaker with Cable

0012-00-0257-05

Captive Cable, Soldered to CPU Circuit board.

Recorder circuit board 0670-00-0583

Captive Cable soldered to the Communication Circuit board

External Communication Circuit board 0670-00-0661-01

Datascope

Communication

Connector

Three circuit phone jack

0012-00-1089

Electro luminescent panel lite

LCD Display Module

0160-00-0034

CAPTIVE CABLE

0012-00-0988

Captive Cable, Soldered to Communication Circuit board.

External

Interface Conn.

0012-00-1090

9 pin female DIN

CAPTIVE CABLE

0670-00-0649

100 VAC

Hi Volt. Inverter

0014-00-0180

0012-00-0989

NIBP Board 0670-00-0584-02

0012-00-0944

CPU / LED Board 0670-00-0650-03 for units with SpO2 0670-00-0650-04 for units Without SpO2

0012-00-1238

Male / Female Header Connector

KEYPADS:

Units with Trend display, and No SpO2: 0331-00-0102

Units with Trend display, and NELLCOR SpO2: 0331-00-0108

Units without Trend display, and No SpO2: 0331-00-0104

GRAPHIC OVERLAYS:

0330-00-0026-XX

0330-00-0027-XX

0330-00-0025-XX

NELLCOR SpO2 interface board 0670-00-0675

NELLCOR SpO2 Circuit Board MP304

0671-00-0162

NELLCOR SpO2 sensor receptacle Front Panel

0012-00-1222-01

J 3

0670-00-0585

part of IR cradle assembly

0997-00-0426

Receiving photocell

Security

Magnet

Reed Sw.

Transmit LED

Infrared hand

held device.

Captive Cable, Soldered to CPU Circuit board.

Thermometer,

Infrared

Interface Board

9 V Alkaline Batt.

Thermometer,

Batt. in

handpiece

Tone Processor Board

0670-00-1134

Tone Processor Board shown but not used in all versions

0670-00-0582

Batt. in main housing

9 V Alkaline Batt.

Battery shown but not used in all versions

Thermometer,

Predictive,

circuit board

Temp. Probe receptacle 0012-00-0953 WITH 9V battery or 0012-00-1335 WITHOUT 9V battery

Accutorr Plus with NELLCOR SpO or without SpO Wiring

Block Diagram

Revised 12/20/00

2-7

Notes

Accutorr Plus with Masimo SpO2 or without SpO2

1. Detailed functional descriptions are found in the Theory of Operations section

Wiring Diagram

2. Functional blocks with dashed outlines are optional features. (---)

3. Shaded blocks are considered "black box" devices

0012-00-1015

12 Volt

NIBP Pump

Filter Board

0670-00-0584-03

DC Power Supply

0014-00-0184 (SLA)

0012-00-0986

0014-00-0225 (Li-Ion)

Batt. Fuse

0012-00-0943

Li-Ion Batt. Cable 0997-00-0944

SLA Batt. Cable 0406-00-0754

Mains Input

0012-00-0941

10.8 V Battery Lithium - Ion

0146-00-0069

12 V Battery

Lead Acid

0146-00-0043

Speaker with Cable

0012-00-0257-05

Captive Cable, Soldered to CPU Circuit board.

Recorder circuit board 0670-00-0583

Captive cable soldered to the Communication Circuit board

External Communication Circuit board 0670-00-0661-01

Datascope

Communication

Connector

Three circuit phone jack

0012-00-1089

Electro luminescent panel lite

LCD Display Module

0160-00-0034

CAPTIVE CABLE

0012-00-0988

Captive Cable, Soldered to Communication Circuit board.

External

Interface Conn.

0012-00-1090

9 pin female DIN

CAPTIVE CABLE

0670-00-0649

100 VAC

Hi Volt. Inverter

0014-00-0180

0012-00-0989

NIBP Board 0670-00-0584-02

0012-00-0944

CPU / LED Board 0670-00-0650-03 for units with SpO2 0670-00-0650-04 for units Without SpO2

0012-00-1238

Male / Female Header Connector

KEYPADS:

Units with Trend display, and No SpO2: 0331-00-0102

Units with Trend display, and Masimo SpO2: 0331-00-0108

Units without Trend display, and No SpO2: 0331-00-0104

GRAPHIC OVERLAYS:

0330-00-0026-XX

0330-00-0027-XX

0330-00-0025-XX

Masimo SpO2 interface board 0670-00-0716

J 2

0012-00-1338

Masimo SpO2 Circuit Board MS-3

0671-00-0163

Masimo SpO2 sensor receptacle Front Panel 0012-00-1344

J 6

Tone Processor Board

0670-00-1134

Captive Cable, Soldered to CPU Circuit board.

Receiving photocell

Infrared

Interface Board

0670-00-0585

part of IR cradle assembly

0997-00-0426

Thermometer,

circuit board

0670-00-0582

Security

Magnet

J 5

Reed Sw.

Transmit LED

held device.

9 V Alkaline Batt.

Thermometer,

Infrared hand

Batt. in

handpiece

Temp. Probe receptacle

0012-00-0953 WITH 9V battery or 0012-00-1335 WITHOUT 9V battery

Accutorr Plus with Masimo SpO or without SpO Wiring

Block Diagram

Revised 12/20/00

Tone Processor Board shown but not used in all versions.

Thermometer,

Predictive,

Batt. in main housing

9 V Alkaline Batt.

2-8

Battery shown but not used in all versions

2.2.1 LED/CPU Module - 0670-00-0650-03, -04

The 0670-00-0650-03 is specified to be used with the Accutorr Plus NIBP with Trend Screen and SpO

. The 0670-00-0650-04 is specified to be used with Accutorr Plus

NIBP and the Accutorr Plus NIBP with Trend Screen.

SPO2

10 pin J7

NIBP/POWER

PART OF J1

Temperature

Probe

Systolic

7 7 7

Diastolic

6 6 6

Pulse Rate

5 5 5

+15V

-15V

+5V

SPO2_TXD

SPO2_RXD

SPO2*

SPO2RST*

OVPR_DET*

GAIN0

GAIN1

CLEAR*

SER_DI

SER_DO

SER_CLK

PED

NEO

PRED*

TYMP*

TEMP_RxD

TEMP_TxD

SERIAL CLOCK CONTROL U13

MAP

Room

Number

Temp/Time/Interval

SPO2

Pressure

Valve &

Control

U13,U14,U16

Oscillator

16.00 Mhz U2

Bed

Number

Over

Latch

U15

Pump

SPCLK

SPCLKEN*

0123

Disable

CLK

RS232ENB*

Seg.

Digit

Seg.

Digit

Seg.

Digit

TxD2 RxD2

SCP

CPU

68302 Microcontroller

UART

TxD3

TxD1

RxD3 RxD1

Tri-State Transceiver

Driver

CTS1*

Digit

U10

Digit

RST*

Power On

Reset

RTS1*

RESET*

PIO

EXT_RTS

EXT_CTS

Resource Cont rol Register

KeypadP ort

ConfigurationPort

ACONLED

RTC W/

4kX8 NVRAM

U28

SRAM 512k x 16 U4,U5

Flash Memory 512k x 16

VBULK CSTAT*

VCC

U3, U27

Dual D/A Conver ter U22

Central Station

Serial

Port

Bus

ACON

CSTAT*

RS 2 32

Xceivers

RxD

U26

TxD

SPO2* PRED* TYMP* RECD*

HI_LOW* LCD_UNIT*

From 12 Volt Battery

4Volt

Regulator

U17

Battery

Backup

Control

U19

RST*

Audio Volume Control & Speaker Driver Circuitry U24, U25

LCD View Angle Control Circuit ry U23, Q8, Q9

Port

SPO2RST*

12+-15ON CHRGOFF

WR_LED3*

WR_RECD*

Data

ON/OFFSW*

Power On/Off

Latch

ACONLED

ON/OFFSW*

HOME* DREQ* WR_RECD* RUN* RECD* RESET* VCC, +5VP

A(2)

ACON*

OFF/ON*

CHRGOFF*

ACON*

+5 volts

+12 volts

+15 volts

-15 volts

VEE

VCC

WR_LCD*

RD_LCD*

CS_LCD*

A(2)

RESET*

D(7..0)

Power Supply

VBULK

Keypad

keys

LEDs

30 pin J2

Recorde

20 pin J5

Speaker

pin J6

LCD

20 pin J8

Figure 2-3

LED/CPU Block Diagram

2.2.1.1 Hardware Overview

The Accutorr Plus LED/CPU module controls the functions of the NIBP, receives input data from the keypad, temperature probes and SpO

module, transmits output data to

the recorder, drives the LCD display, speaker, and LEDs, is an interface connection for central station support and has a serial I/O port for PC communication.

2.2.1.2 Software Overview

The software performs the following functions:

1. Initialize hardware and software modules.

microcontroller ports and communications (serial) interfaces

software entry points and variables

2. Perform power up diagnostics.

microcontroller, FLASH, and STATIC RAM tests

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3. Perform NIBP functions.

start measurement

repeat measurement

overpressure limit

enter or exit text mode

abort measurement

enter or exit calibration mode

update alarm limits

report alarm status

report data

4. Transmit/Receive data to/from Temperature module.

5. Manage Recorder functions.

6. Manage Keypad interface.

7. Drive Seven Segment LED.

8. Provide RS232 communications to PC and support software download.

determine inflation pressure

perform controlled cuff deflation

monitor DC and AC pressure and

acquire pulsations

decide on termination point and

exhaust cuff pressure

smooth pulsation data

determine systolic, mean, diastolic

pressure and heart rate

check alarm conditions

9. Support Service Diagnostics.

2.2.1.3 Detailed Hardware Description

Microcontroller, U1

Device U1 is an MC68302, which contains a 68000 core CPU, a 24-bit address bus and a 16-bit data bus. Clock oscillator, Y2, shall operate at a clock speed of 16MHz which is used to clock U1. Three serial channels are used. One for communication to the temperature modules via J4. The second for communication to an external port for PC applications via J3. The third for communication to the SpO also offers a Serial Communication Port (SCP), which interfaces to the NIBP A/D. The recorder interface is via the IDMA channel with buffering through a transceiver of all data to the recorder.

The power-on reset to the microcontroller and the rest of the system is generated by a DS1239 micromanager (U19). The DS1239 also acts as a watchdog to the microcontroller. The ST* input must see a high to low transition every 100ms maximum by the ST_WDOG* signal (an addressable signal from the microcontroller), otherwise a reset will be generated.

Upon a reset, both RESET* and HALT* will be activated through buffer U18 (74HCT125). These signals are bi-directional at the MC68302, therefore U1 could perform a system reset.

module. The MC68302

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Multiple power and ground pins are used on the microcontoller. All VCC pins get a bypass capacitor to keep the local power supply quiet.

The following is a signal description for the MC68302 as it is being used in the Accutorr Plus:

FUNCTIONAL GROUP SIGNALS SIGNAL DESCRIPTION I/O ACTIVE

Clocks System Control

Address Bus Data Bus Bus Control

Interrupt Control

Chip Select Serial Communications Port

Channel 1 UART

Channel 2 UART/Port A

EXTAL Oscillator input I high RESET* Microcontroller Reset I/O low HALT* Microcontroller Halt I/O low BERR* Bus Error I/O low BUSW Bus Width Select I h-16 bit DISCPU Disable CPU I high A23-A1 Bi-directional addr bus I/O D15-D0 Bi-directional data bus I/O AS* Address Strobe I/O low R/W* Read/Write I/O h-read

l-write UDS*, LDS* Upper/Lower Data strobe I/O low DTACK* Data Transfer Acknowledge I/O low IRQ1*, IRQ6*, IRQ7* IRQ7* PWR_OFF* (Power fail

IRQ6* DONE* (DMA done) I low IRQ1* OVPR* (NIBP overpressure) I low CS0* - CS3* Chip Select lines O low SPRXD SER_DO (NIBP A/D data

SPTXD SER_DI (NIBP A/D data in) O SPCLK SPCLK (NIBP A/D clock) O high RXD1 EXT_RD (Receive data) I TXD1 EXT_TD (Transmit data) O CTSI* EXT_CTS* (Clear to Send) I RTS1* EXT_RTS* (Request to

RXD2/PA0 SPO2_TXD (SPO2 xmit) I TXD2/PA1 SPO2_RXD (SPO2 rec’d) O PA2 NEO (NIBP Neonate select) O high PA3 PED (NIBP Pediatric select) O high PA4 SGAIN (NIBP

PA5 BFAST (NIBP Bleed fast) O high PA6 LVEN (NIBP Linear Valve

PA7 DUMP (NIBP Dump

RXD3/PA8 TEMP_TXD (TEMP

TXD3/PA9 TEMP_RXD (TEMP

PA10 GAIN0 (NIBP Pulse Gain) O high PA11 GAIN1 (NIBP Pulse Gain) O high PA12 CLEAR* (Reset NIBP pulse) O low

Dedicated interrupts, edge-sensitive

ure)

out)

Send)

Pressure Gain)

enable)

valve)

receive data)

transmit data)

I low

O high

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FUNCTIONAL GROUP SIGNALS SIGNAL DESCRIPTION I/O ACTIVE

Channel 2 UART/Port A

Port B

PA13/DREQ* DREQ* (Recorder DMA

Request) PA14 AD_CS* (NIBP A/D CS) O low PA15 DONE* (DMA done) O low PB0 ELOFF* (LCD Backlight

off) PB1 ACON (AC on) I high PB2 SPCLKEN* (SP Clk enable) O low PB3 ENPNEU* O low PB4 RS232ENB* O low PB5 DSP-CONT* O low PB6 TONE O high PB7 PUMP_ON (NIBP pump

on) PB8 CSTAT* (RS232) O low PB9 HOME* (Recorder print

head home) PB10 RUN* (Recorder motor on) O low PB11 EOC (NIBP A/D End of

Conversion)

I low

O low

O high

I low

I high

Address and Data Bus Dampening

Dampening resistors have been added to all Address and Data Bus lines that provide control and interface to I/O devices and the LCD, on CS2 and CS3. All address lines and data bus lines used for the Flash, SRAM and RTC/NV Ram do not have dampenig resistors. The dampening resistors are to located as close to the microcontroller, U1, as possible.

Flash memories, U3, U27

Program code is stored in two flash memories, ie., SST 28SF040, 512K x 8 addressed as upper and lower sector addressable to 256 bytes. These devices allow in circuit programmability, which will allow easy upgrades to software revisions. CS_FLSH*, will chip select these memories. Flash memory chip U3 is the Even byte and U27 is the odd byte.

Worst case for CS_FLSH* to data valid is 150ns max. Data must be valid 15ns min before MC68302 S6 falling edge. With one wait state inserted, 3.5 clock periods will occur before S6 falling edge. Therefore data will be ready 48.25ns before S6 falling edge, which will meet the requirement of 15ns min.

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CMOS SRAM, U4, U5

This memory made up of two 512K x 8 SRAMs, U4, and U5. The memories are non-volatile due to the circuitry of Micromanager U19, and the Primary Battery Backup Voltage Regulator, consisting of Q7, and U17. The timing for the two SRAM’s are the same. The SRAM write condition will be looked at first.

CS_RAM* must be active low 90 ns min before WR* rising edge. CS_RAM* is active 40ns max from S2 rising edge. WR* rising edge occurs when S6 falling edge occurs. With one wait state, as above for the flash memories, there will be 3.5 clock periods. Therefore, CS_RAM* will be active 168.25ns, compared to requirement of 90ns min. This will meet the write timing.

CS_RAM* to data valid is 55ns max for SRAM read. Data will be valid 162.5ns max from CS_RAM* active low. Therefore, with 3.5 clock periods to S6 falling edge, data will be valid 68.25ns before S6 falling edge. This will meet the setup to S6 falling edge of 15ns min.

Battery Backup Circuit

U17 is a 4V regulator which must supply current during battery mode. It supports the Real Time Clock, U28, Micromanager, U19, and the two SRAM’s. The RTC will draw 1uA, Micromanager, 20uA, and the SRAM’s, 200uA. Total current draw from U17 is 221uA max. U17 can supply 30mA @ Vin=6V. VBULK can supply 21mA max at the minimal voltage of 9.77V. The current supplied by U17 will then be minimized to 21mA.

U17 maximum input voltage is 14V. The maximum voltage at VBULK is 17V. Therefore, a resistor divider network of R11 and R12 is used in conjunction with Q7 to lower the voltage at U17-2. The maximum voltage at the Q7 base is 10.42V. Minimum Vbe for Q7 is 0.65V. Maximum Vin will be 9.77V, which is lower than 14V as discussed above.

Micromanager, U19

The micromanager is a DS1239. It performs four functions:

1. System power on/off capability.

2. Watchdog functions.

3. Create CMOS SRAM to Non-volatile memory.

4. Power monitoring of VCC.

The MC68302 specifies to be held in reset for 100ms min upon power up. The DS1239 can hold the reset line, active low for 25ms min. In order to hold the reset line down for 100ms min, then the addition of a capacitor to the PBRST* input is needed. The minimum time for the PBRST* input to reach 2.0V, logic hi to turn on unit, with a 47uF capacitor is 142ms.

The watchdog is monitored on U19-11. The maximum strobe period is 100ms. Therefore, in order for the device not to reset the system, U19-11 must be strobed 100ms max.

The DS1239 can supply 1mA through U19-2, VCC_BACK, during battery mode. The SRAM’s will draw 200uA max during battery mode.

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Real Time Clock and NV RAM (RTC), U28

The RTC is a bus device that will keep track of seconds, minutes, hours, date of the month, month, day of the week, and year with leap year compensation. The module contains a 10 year lithium source and internal crystal. The independent Lithium battery is a back up so that in case AC power is not on, the battery voltage will keep the time up to date.

Also included in the device is 2K X 8 nonvolatile RAM. This ram is continuous addressed above the RTC information.

NIBP Control, U13, U14, U15, U16

U15 is used to create an over pressure latch, that will monitor OVPR_DET*, for a hard ware over pressure situation. When this circuit is tripped, the pneumatic drivers will be disengaged, and no NIBP functions will exist until a power-on reset occurs. The over pressure signal may have inadvertent triggers. In order for OVPR_DET* to trigger the latch, it must be active low for 66ms min, due to C11, R16, and R15.

U15, also is used for a pneumatic safety latch. In the case of a MC68302 clock failure, the pneumatic drivers will be disengaged upon a power-on reset. If the clock is running, then the software will toggle EN_PNEU*, to enable the drivers and NIBP functions will work.

Upon power on reset, the following sequence must be met in order for the over pressure and pneumatic safety latches to be initialized properly: U15-1 must go to a logic hi 76ns min before RST* rises to a logic hi, and RST* must go to a logic hi 76ns min before EN_PNEU* toggles logic low to a logic hi. The pneumatic drivers are made up of U14, U13, and U16. These gates are used for the turn on of the pump, dump valve, linear valve, and other controls. As discussed above, they will only work given the proper initialization or no fault condition.

The serial clock to the NIBP A/D, TLC2543, is controlled via U13. SPCLK comes from the SCP of the MC68302 and is gated by SPCLKEN* to form SER_CLK. SPCLK cannot be higher than 4.1MHz. AD_CS* is the enable to the chip select input of the device. EOC is an output signal of the A/D, and specifies an end of conversion. It goes hi to low and remains low until a conversion is completed and data is ready for transfer. AD_CS* must be active low for 1.425us before SER_CLK starts toggling. EOC will go low 2.2us max from last SER_CLK.

Recorder interface

The recorder interface is a buffered 8 bit parallel data bus with handshaking and reset capability through connector J5. The buffering provides pass through filtering and ESD suppression is provided by U35. WR_RECD* is driven by the LED/CPU board and used by the recorder to latch the data bus. This interface is handled by the DMA capability of the MC68302. The recorder drives two signals, DREQ*, and HOME*. DREQ* specifies to the MC68302 to send the next byte of data. HOME* will specify when the recorder has reached its starting point to begin a new line.

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Temperature interface

This is a serial interface operating in one direction. The MC68302 is set up to receive serial information through connector, J4. The signals are TTL levels. Also, this connector will accept two temperature modules, one a Predictive, the other, an Infrared module. The software will query the MC68302 ports to determine if and what temperature module is installed. When the Predictive module is attached, PRED* is pulled to active low. When the Infrared module is attached, TYMP* is pulled to active low.

LED Drivers, U8, U9, U10 and U1 on the Keypanel

The seven segment LED’s, and green LED’s on the keypad are driven by four MAXIM ICM7218A LED Display Drivers, three on the CPU board and one on the keypad. These drivers accept parallel data in a serial format and drive common anode displays. A ‘no decode’ feature is available on this device which allows for greater flexibility in controlling each individual segment. The writes are performed via U11. The scan rate of the LED’s is 250 Hz, with a duty time of 500us, typically. Also, the drivers can enter a shutdown mode, where typically 10uA is needed per device. The write signals, WR_LED(0..3)*, must be active low for 200ns min. Data bus, D(0..7) must be setup 250ns with respect to the write signal rising edge. The LED drivers are mapped to the CS_IO* of the MC68302 and is configured for 4 wait states. As discussed above, WR_LED0* must be active low for 200ns min. WR_LED0* will become active upon DS* going low. DS* will go low 41ns after S4 rising edge. There will be 5.5 clock periods from S4 rising edge. This amounts to 343.75ns - 41ns = 302.75ns min that WR_LED0* will be active low for. This meets the write strobe timing. As discussed above, data must be valid 250ns to WR_LED0* rising edge. Data is written by the MC68302 30ns after S4 rising edge. S4 rising edge to S6 falling edge is 343.75ns. Therefore, data is valid 313.75ns min before WR_LED0* rising edge, which is greater than 250ns.

DS1-DS6 are 7 segment 0.8" high Red LEDs. DS7-DS9 are 7 segment 0.56" high Red LEDs. DS10-DS12 are 7 segment 0.56" high green LEDs. DS13-DS15 are 4 digit 7 segment 0.28" high red LEDs, with a upper and lower colon. The driver lines for DS10 DS12 are latched and driven by individual 74HC374A with each output driving a segment through current limiting resistors sized for the mcd intensity of each color. The data is latched by using a 74HC123 inverted output is used to latch the data. The trigger is the multiplexed anode line from the Maxim IC and the output state change is delayed a minimum of 40uS and a maximum of 200uS. This will enable the latch from 10 to 50% into the multiplx line.

The discrete LEDs on the keypad are driven by WR_LED3* which is located on the keypad. For the purpose of design control the device is contained within these design documents. This device is used to illuminate the individual LEDs on the keypad. The timing and function is the same as above.

The display controllers are 8 bit devices located on the odd address locations defined in Appendix A2. An additional data bus line, D8, is used to enable the display drivers for the SpO2 and Heart Rate. The bit is written to by either the control or data registars. The device is enabled by a high signal on D8 that is clocked in by RST_WR_LED (0..2)*.

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Keypad interface

The keypad is made up of a 3 x 8 matrix of keys. U6 will monitor the array of 8 keys. It is pulled up and when a key is pressed, one of those lines will go low. An interrogation will commence from the MC68302 to find which key was pressed.

Communication Interface

The Accutorr Plus Communication module provides the communication signal interface between the LED/CPU board and the external communication interface connector. The board supports the CIS/HIS/DIAP interface via RS-232E or RS-485, providing a feed through path for the Datascope proprietary download connector (J1), the DC/DC converter (for the =12Vdc @ 100mA required for wireless telemetry), and the RS-232 driver.

SpO

Interface

The SpO

module connects to the LED/CPU module via connector J7. Power, ie., æ15V

and +5V, and ground are provided by the LED/CPU module. The MC68302, interfaces with the SCC2692 of the SpO sends serial information via signal, SpO SpO

_RXD. The LED/CPU module can reset the SpO2module by asserting

SpO

RST*. The signal SpO2* is used to provide the LED/CPU with the systolic signal

module through a TTL serial interface. The SpO2module

_TXD, and receives information via signal,

used to create the heart beat.

DAC functions

U22 is a dual 8 bit DAC, that interfaces to U1, MC68302. It controls the attenuation needed for the speaker driver circuitry and the amplitude of LCD drive signal, VEE, ie., steps of 255 from 0 to -10.4 V minimum. The device is selected via the CS_IO* signal. Power to the DAC is provided by an unboard DC-DC convertor. The DAC is written to when WR_DDAC* pulses hi when CS_IO* is active low. Timing is equivalent to that discussed in section 2.3.10.

Speaker Driver

This function is driven by the MC68302 in two manners. One is the enable signal, TONE, and the other will attenuate the output signal in steps of 255 via the data bus, D(0..7). TONE is a 5V signal which is divided down by 26 to 200mV and buffered by U24, LM358. This signal is then attenuated by U22, AD7528, and buffered by the other half of U24. U25 is the speaker driver section and this amplifier is set for a gain of 20.

LCD

The LCD drive supply voltage is specified for -10.4V minimum. It can go to a maximum of 17V with respect to VDD logic supply voltage. The DAC, U22 will take +15VF as reference voltage and feed that to TL032, U23, to invert to -15V output. That is then buffered by another section of U23 and drive base of Q9. Transistor Q8 is set up as a current limiter for Q9. It monitors the current across R32. If the voltage across R32 is greater than 0.7V, ie., 21mA, then shunt drive voltage to the base of Q9 to limit the current.

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Power ON Tone

The power on tone is used to inform the user the unit is powered on. The speakers amplifier is driven by an oscillator for a min. 70 mS. The device is triggered by either a press of the ON/STBY key, turning the unit on, or a reset condition. The oscillator is designed to run at approximately 600hz.

Central Station

The microcontroller has control over the external serial communications with CSTAT* and RS232ENB*. The board includes a connector, shared with the RS232, for connection to an interface PCB. This interface includes RD, TD, RTS, and CTS for communication, VBULK which is the main battery voltage, VCC for logic drive, CSTAT* for control of the interface status and DGND. VBULK is capable of supplying 1 watt of power to this module.

2.2.2 NIBP Module, Linear Bleed

Overview

The NIBP module contains only the Pneumatic and the Analog circuits. The NIBP module is controlled by the CPU on the LED/CPU module. All analog signals are converted by an on board serial A/D converter and sent serially to the CPU for processing. The NIBP module, in conjunction with the LED/CPU module, measures the blood pressure non-invasively using an inflatable cuff and the oscillometric principle.

The NIBP module is controlled by the CPU where it inflates the cuff, bleeds down the cuff pressure during measurement and engages the dump valve which relieves cuff pressure at the conclusion of the measurement. It monitors the air pressure in the cuff via a pressure transducer. It is from this signal (both AC and DC components) that it determines the NIBP of the patient via the oscillometric principle. Safety features include a hardware over pressure limit set to the corresponding limit depending on patient size selected via the control panel. This hardware pressure limit is in addition to a software controlled limit which will provide redundant fail safe operation upon a fault condition.

The “Linear Bleed” NIBP module has a single proportional valve, having a continuously variable effective orifice size. This valve is controlled by a servo loop, such that the cuff deflation rate is closely and automatically regulated to a specified value, despite changes in the cuff volume and pressure.

In addition, the NIBP module distributes the power from the power supply, which includes power and control signals to the LED/CPU module. Via the LED/CPU board, power is distributed to the rest of the system, such as the Recorder and the SpO

modules. Also, the NIBP module supplies separate power and control to: a) Pump filter board, which powers the NIBP pump. b) LCD back light converter.

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Software Control

There are no software requirements on this board. The microcontroller for this board’s functions are located on the LED/CPU board.

Hardware Functions

Pressure transducer circuitry

A pressure transducer and amplifier is provided to acquire the cuff pressure signal. Performance is consistent with pressure range and accuracy specifications for the NIBP module.

Over pressure transducer circuitry

An over pressure transducer, independent of the main pressure transducer is provided. An amplifier, a comparator with three selectable over pressure limits, and an over pressure output signal interpret the transducer state. Over pressure limits are set according to the patient size.

Five A/D channels

All channels are at 12 bit resolution and digitized at 300 Hz:

1) DC pressure

2) AC pressure (pulse)

3) Hardware over pressure transducer

4) Hardware over pressure comparator reference.

5) Battery voltage monitoring, when the Accutorr is in battery operation.

Pulse Channel Filter

A high-pass filter is provided to isolate the pulsatile component from the DC cuff pressure. This pulsatile component is digitized as the pulse channel. The gain of this AC coupled channel is programmable in a manner consistent with the specified range of pulse amplitudes. Means are provided to rapidly “reset” the filter following disturbances caused by motion or activation of the pump or valves.

Inflation Pump

A pump capable of inflating the cuff within the specified time limit.

Bleed Valve

A valve and control system capable of bleeding down the cuff pressure in accordance with the specifications.

Dump Valve

A valve to rapidly discharge the residual cuff pressure at the end of the measurement cycle.

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Chapter 2 - Theory of Operation

Figure 2-4

NIBP Block Diagram

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2.2.3 Recorder Module

Accutorr Plus Recorder module provides the interface from the LED/CPU module to the recorder. This module is strictly an output device for the Accutorr Plus. Data is written to the module via DMA and is then routed out to the recorder.

Software Control

There are no software requirements on this board. The microcontroller for this board’s functions are located on the LED/CPU board.

Hardware Functions

Recorder Driver Circuit Board

This circuit takes all control instructions from the LED/CPU board and provides printhead drive decoding, paper drive motor control logic decoding, printhead “home switch” position sensing and pulse width modulated oscillator for print head drive.

Recorder Transport and Print Assembly

This mechanical assembly has no active electronic components. A paper drive motor, print head shuttle and print head position sensor report to the Recorder Driver circuit board.

Figure 2-5

Recorder Module

Control Logic

Block Diagram

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2.2.4 Predictive Thermometer Module

Overview

The Accutorr Predictive Thermometer Module, is an optional accessory to the Accutorr Plus or Plus with SpO

The Predictive Thermometer PCB consists of 2 68HC705C8A microcontrollers (MCU) IC’s (U4 and U3). MCU U2, is provided by Sherwood Medical, and its software program converts the thermistor output signal to a seven segment code used to drive a display. The second MCU U3 software program, converts the seven segment code to a serial TTL-level signal, that is isolated from the main Accutorr Monitor via opto-isolators.

Block Diagram

An overall block diagram of the Predictive Thermometer PCB is shown below. The Predictive Thermometer PCB consists mainly of a differential amplifier (ICL7612), an A/D converter (ADC0834B) and 2 microcontroller IC’s that convert the analog signal of the input temperature probe to a serial TTL-level signal.

Software Control

The determination and processing software within the module is adapted under license from an outside vendor, as part of U4. Software control of data communicated to the LED/CPU board for further processing and display control.

Figure 2-6

Predicative Temperature Module Block Diagram

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2.2.5 SpO2Module: (Accutorr Plus Model with Datascope SpO2only)

General Theory of SpO

determination: A pulsatile arterial saturated oxygen monitor

detects the oxygenation level of the blood in the body’s arterial circulation. It is used to continuously monitor the effectiveness of the pulmonary system (lungs). Specifically the device, within limits, determines the fraction of hemoglobin molecules carrying oxygen from the lungs to the body cells. Termed % SpO

, this fraction is normally about 97 percent.

The device measures the relative attenuation of two specific wavelengths of light (red and infrared) by the arterial blood. A sensor from the instrument contains two sets of LED’s to illuminate a portion of the body (e.g., a fingertip), and a single photo-detector to sense the amount of light which exits. The two sets of LED’s are alternately pulsed so that the circuitry can discriminate the infrared light. Each time the heart pulses arterial blood into the finger, the photo-detector’s signals return to their original level. The electronic instrumentation processes only this changing portion of the photo-detector’s outputs. Thus, arterial blood (not skin, bone, venous blood, etc.).

The determination is based upon the assumption that hemoglobin and oxyhemoglobin are the only two significant attenuators of light in the arterial blood. The device exploits the difference in their optical attenuation characteristics. But since the detector’s signal is sensitive to the combined attenuation of both molecules, the device must use two different wavelengths to discriminate their individual contributions, and thus their relative concentration.

The SpO

Module allows the Accutorr Plus Model with SpO2to measure patient’s blood

stream saturated pulsatile oxygen level and pulse rate.

Datascope SpO

The SpO

board consists of analog and digital sections. The analog section provides all

Module Theory of Operation, Electrical Description

the patient finger probe excitation and analog signal processing. The digital section controls the operation of the analog part of the board and provides communication to the rest of the Accutorr Plus with SpO

via the U14 DUART.

Analog Section

The operation of the analog section is controlled by the digital part of the board by:

Supplying CLKSEQ clock signal to the sequencer.

Latching signals D0..7, into control register with strobe signals

CONTROL-REG0*, CONTROL-REG1*, and CONTROL-REG2*.

Monitoring COMP* and SAT* signals.

The sequencer controls the front end of analog section. It provides RD-DRV and IR-DRV signals for the LED drive circuit, which in turn alternately drive red and infrared LED emitters in the probe. A single photo-detector on the opposite side of the finger produces current pulses proportional to the amount of light received. The sequencer also sets the gain of the current to voltage pre-amp and controls the demultiplexer. Gain values for current to voltage pre-amp are derived from control register signals IR0, IR1, RD0, and RD1. The fact that the sequencer has synchronous control of LED drive, gain of current to voltage pre-amp, and demultiplexer makes it possible to set different current to voltage gain values for infrared and red signals.

The control registers provide data for the DAC and set gain values of dc gain (DCG0, DCG1), ac gain (ACG0, ACG1), and current to voltage pre-amp (IR0, IR1, RD0, RD1)

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stages. Wide gain range gives the board enough flexibility to acquire signals from fingers spanning a wide range of thicknesses or alternatively from other sites of the body such as ears, nose or toes. It also controls the remultiplexer (CHNLMUX) and provides calibration signal

CAL*, which is used by the sequencer to determine the operation mode, and test signal DIAG*, which supplies a fixed voltage source at demultiplexer input for circuit diagnostics.

Again because the control registers can synchronously control the remultiplexer and gain values for ac and dc gain stages, different gain settings can be selected for red and infrared signals.

An interference detector monitors the output of current to voltage preamp for voltages less than negative 7.2 V in amplitude. This information is sent to the digital section through SAT* signal.

The patient probe signal enters the board as current pulses. After the signal goes through the current to voltage preamp stage it is separated by the demultiplexer circuit, which steers each voltage pulse to one of two signals, IR-CH or RD-CH. In addition, the circuit sends a negatively amplified version of the signal level between LED pulses to both channels. This residual signal is caused by ambient light on the photo-detector and offset voltages from the preceding circuitry. The negative amplification sets-up cancellation of the extraneous effect of the residual signal by the filter circuits that follow.

Signals IR-CH and RD-CH are then filtered identically by two parallel and matched filters. The filters also reduce the effect of any noise source, which might interfere with the measurement, such as an electro-surgical unit.

After passing through filter blocks red and infrared signals and are alternately selected by the remultiplexer for further processing. Next, the signal is amplified by the dc gain stage. Having the ability to apply a different gain to the two components, this block functions as a coarse equalization of the multiplexed signal.

An offset voltage, determined by the DAC, is then subtracted by the subtraction circuit. The plethysmographic waveform consists of a small component varying along with the physiological pulse, sitting on top of a larger pedestal. The subtraction circuit pulls off most of this pedestal. The subtraction circuit also helps to maintain the resultant signal in the amplifier linear region.

The residual multiplexed signal is once again processed through a microprocessor controlled ac gain block. One of a few discrete gains is chosen for each of the two components, such that the peak to peak size of the physiologically varying components is large enough to be digitized with sufficient resolution.

After passing through the ac gain stage the signal is sampled by a sample and hold and held for amplitude digitization. The digitization is performed under the microprocessor control of the digital to analog converter. The DAC voltage is successively altered by the microprocessor until it zones in on the signal being digitized. A comparator then compares the signal and DAC voltages and sends COMP* signal to the digital section.

The DAC thus performs a dual function. It is used in both the subtraction and the comparator blocks. Every 1/240 of a second, the circuit’s control functions are flipped to process the alternate component of the multiplexed signal. The multiplexer switches signals, the two microprocessor controlled gains are changed, if necessary, and a new digital code is sent to the DAC for use in the subtraction circuit. After settling to it’s new value, the signal at the input of the comparator is frozen by the sample and hold circuit. The DAC is now available to be used in the digitization. At the next 1/240 second interval, all the control signals revert to the previous values.

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Digital Section

The digital section of the board performs two distinct functions: analog section control and interface to communications ic’s.

This section is based on a 63C09E microprocessor. The analog section is accessed by writing data into the control registers. Address decoding for generating control register strobes CTRL-REG0*, CTRL-REG1*, and CTRL-REG2* is done by an EPLD address decoder. The same address decoder is also responsible for monitoring status lines COMP* and SAT*. THE 63C09E can observe the status of these lines by reading RD0 from the assigned memory location (See Table XIV).

A watchdog timer chip provides RST and RST* signals to initialize the processor, the three EPLD’s and the two communications ICs. This watchdog is activated by any of a number of sources: 1) a dip in the +5 volt logic supply, 2) a reset from the Accutorr Plus with SpO

host processor board on HSTRST*, or 3) lack of a strobe from a software control

loop on DOG-STR*. A 68C681 UART interface the processor to the host processor board. Processor and communications shared memory consists of both static ram and flash ram.

Figure 2-7

SpO

Block Diagram

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Chapter 2 - Theory of Operation

2.2.6 Main Power Supply

Power supply for Sealed Lead Acid Battery

The power supply is capable of operation between 85 and 264 Vac, 47 to 63 Hz sinewave input source.

It is a fixed frequency, (62 Khz) flyback buck converter with a secondary buck and flyback converters for the outputs. The bulk output of about 17 V is regulated via opto-coupler feedback. The bulk supply has over voltage and over current protection.

The secondary battery connection is diode “or”-ed with the bulk supply in order to provide operation without AC applied. The battery is charged via a four stage charger.

Battery Charger for Sealed Lead Acid Battaery

The battery charger provides four levels of charge stages as well as over current and over voltage protection. The circuit is based on a single chip controller, the Unitrode UC3906, and external programming components. In this implementation, the circuit detects the presence and voltage of the battery and provides a very low current source to determine the state of the battery. If the battery voltage begins to rise, at a preset threshold, the circuit switches to a heavy charge rate until and upper charge level is attained. At this stage the circuit will switch into an overcharge or float charge mode to insure a fully charged battery.

Power Supply for Lithium Ion battery

The power supply is capable of operation between 85 and 264 vac, 47 to 63 Hz sinewave input source.

It is a fixed frequency, (62 Khz) flyback converter with individual secondary buck and flyback converters for the outputs. The bulk output of about 14.5 V is regulated via opto-coupler feedback. The bulk supply has over voltage and overload protection.

The output converters are diode “or” ed from either the bulk output of the battery output in order to provide operation without AC power applied.

Battery Charger for Lithium Ion battery

The battery charger provides a two phase fast charge algorithm for Li-Ion batteries. In phase one, the charger regulates constant current until the battery reaches the maximum cell voltage (MCV). The charger then moves to phase two, and regulates the battery voltage at MCV until the charging current falls to 14% of nominal. The charger then terminates until the battery voltage falls below 95% of MCV.

The charger monitors battery condition, battery temperature, charging time, as well as load on the outputs during battery charging operation. If the battery is severely depleted, the charger will trickle charge at a rate of 1 Hz until the battery is revived. The charger will suspend fast charge if the battery temperature is below 0 Deg C or above 45 Deg C. The charger will also suspend fast charge if the battery has not reached voltage regulation within its allotted time. If the Accutorr unit is operated during battery charger operation, then the maximum fast charge current will be reduced.

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2.2.7 Communication Board

The Accutorr Plus Communication module provides the communication signal interface between the LED/CPU board, 0670-00-0650-01, and the external communication interface connectors. The board supports the CIS/HI/DIAP interface via RS-232E, provides a feed through path for the Datascope proprietary download connector, DC/DC converter for the +12 Vdc @ 100 mA required for wireless telemetry controlled by the CPU and includes the driver for an external isolation relay that is activated by Nurse Call (future option).

The RS-232E interface, used for DIAP, is implemented using a Maxim, MAX239

Multi-Channel Transceiver (U2). This chip has a minimum ± 10 volt output signal level, which provides a safe operating margin above the ± 5 volt minimum RS-232 operating signal

level. Communications is to support a 5 wire interface, 4 signals and a ground. The signals are described below:

All RS-232 signal are ESD protected by a U3, an SM14M24C Transient Voltage Suppressor array. The +12 Vdc power required by the MAX239 is supplied from the on board DC/DC converter. In addition the MAX239 requires 5 Vdc for the internal logic. This is supplied as an input to the communications module. The MAX239 receivers are controlled by logic signal CSTAT*. Logic 0 enables the receivers, other

wise they are tri-stated.

The RS-232 signals appear on connector J2, a dual row 5 pin header which will have a mating 10 pin pendant ribbon cable attached. The other end of the ribbon cable assembly is a 9 pin panel mount `D’ connector. Included on this connector are pins for the future Nurse Call option. See chart for pinout.

The Accutorr Plus software is upgradable via a three wire download communications interface. The required drivers are located on the LED/CPU board and only a signal path is provided to the external interface connector. ESD protection for the signal lines is provided by part of U3. Communications is to support a 3 wire interface, 2 signals and a ground. The signals are Tip being transmit, Ring is receive and shield is ground.

The on board DC/DC convertor provides +12VDC power required for wireless telemetry that will be a future feature available for Accutorr Plus as well as some local circuitry. The DC/DC converter is implemented using a Maxim MAX1771 DC/DC controller used in the Buck/Boost configuration. The supply is designed to deliver 12 Vdc @ 100 mA minimum. When the SHDN pin (U1-4) is high the MAX1771 enters the shutdown mode and its output is approximately zero volts. The shutdown mode is controlled by the state of either of two logic signals NCALL* or CSTAT*. If either of the signals is logic 0, the DC/DC converter will operate normally.

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Chapter 2 - Theory of Operation

VBULK

CSTAT*

NCALL*

DC/DC

CONVERTER

RTS*

CTS*

NCALL*

CSTAT*

(-02)

(-01)

RS232

XCEIVER

RS485

XCEIVER

12VDC

PROTECTION

ARRAY

TXD

RTS

RXD

CTS

NCALL

TXD

RXD

Figure 2-8

Communication Board Block Diagram

The pin assignments for the 9 pin `D’ connector are as follows:

PIN INPUT/OUTPUT DESCRIPTION NAME

1 2 3 4

5 6 7 8 9

Output 12VDC @ 100mA TR_PWR Input RS-232 EXT_RXD Output RS-232 EXT_TXD Output

± 10 Vdc min.

Nurse_call

Output Ground DGND Output Ground DGND Input RS-232 EXT_RTS Output RS-232 EXT_CTS Output Ground DGND

For Standard DIAP connection use pins 2,3,5,7&8 for 5 wire communication and use pins 2,3&5 for 3 wire communication. For connection to a PC the cabling must be Null Modem or:

Signal Accutorr Plus Pin PC pin

TXD RXD Ground RTS CTS

32 23 55 78 87

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Revised 12/20/00

2.2.8 LCD Inverter Module - 0670-00-0649

This describes the circuit that will provide the 90 VAC required for the LCD Module back lite exitation.

DC to AC Inverter

The system +12V signal is fed into the module on J2-1. This signal is then fed to J1-1. The inverter is powered by +12SW (12.5 volt nominal) from J1-2.

Once powered, the inverter is designed to provide the AC waveform required by the backlight over the cabinet temperature range and +12V tolerance. The output AC wave form is 90 Vrms minimum voltage. The AC frequency is to be between 360Hz and 440Hz. C1 and C2 provide filtering of the inverter DC input.

Current Switch

The Q1 gate is connected to J2-3, ELOFF*. This control signal is pulled low by R1 which maintains Q1 in the off state if J2-3 is floating. Since Q1 passes the inverter return current to the ground signal PGND on J2-2, Q1 must be on to enable the inverter. The host can turn on Q1 and enable the T1 inverter by driving ELOFF* high. D1 filters switching transients on +12SW when Q1 is turned on and off.

Figure 2-9

LCD Inverter Module

Block Diagram

+12V

ELOFF*

GND

POWER SUPPLY CONNECTOR

FILTER

GND

FILTER

GND

CONTROL

FET SWITCH

GND

DC/AC

INVERTER

ELPOWER

GND

LCD CONNECTOR

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Chapter 2 - Theory of Operation

2.2.9 Nellcor®MP 304 SpO2Circuit Board Theory of Operation

The MP 304 is a complete SpO Nellcor

Puritan Bennett.

detection and determination circuit, proprietary of

The MP 304 is centralized around a Motorola MC68HC16 micro processor (U-4), driven by a 32.76 Khz. Oscillator. (Y-2) The processor is supported by a 32K x 8 static RAM (U-3) and a SpO

program boot EPROM (U-6).

Patient information is initially processed in a patented ASIC (U-1) (Application Specific Integrated Circuit). Clock pulses are provided by Y-1, a 10 MHZ oscillator. The resulting analog data is then routed into separate Red and Infra Red ADC’s (Analog to Digital Converters) (U-5 and U-7) The resulting digital data is clocked into the microprocessor and is transmitted serially to the Nellcor

Interface Board (0670-00-0675) for further

processing and display.

U-3

Static RAM 32x8

DATA BUS

U-6

EPROM

ADDRESS BUS

NELLCOR Sensor Input

P-1

U-1

ASIC

Y-1 10 Mhz

RED_ADC

A / D_ CLOCK

IR_ADC

SERIAL DATA

U-5

ADC

U-7

ADC

RST*

Connector to NELLCOR Interface Board

U-4

MC68HC16

Y-2

32.768 Khz

NELLCOR MP304 Block Diagram 0671-00-0162

Figure 2-10

Nellcor MP304 Block Diagram

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Revised 12/20/00

2.2.10 NellcorÒInterface Board Theory of Operation

The Datascope to Nellcor and control of the Nellcor

interface circuit board establishes bi lateral communication

Oximeter circuit board.

The circuit board consists of a power supply section that converts +5 VDC into the logic and analog supplies required by the oximeter, and optically isolated logic control for the processing circuits of the oximeter. The optically isolated up converter U1 convert the +5 VDC from the main power supply, into an input voltage for U6, of about 5 VDC. The precision down converter, U6, steps down and regulates the +5 VDC voltage for the digital sections of the oximeter circuit.

The optically isolated up converter U2 convert the +5 VDC to a bi polar +9 and -9 VDC input for U4 and U5, then regulated to +5 and -5 VDC.

The logic control section, consisting of U1, U2 and U3, provide the buffer and isolation functions from the main CPU circuit to the Nellcor

oximeter section.

Figur2-11

Datascope Interface

Circuit to Nellcor

MP304 Oximeter

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Chapter 2 - Theory of Operation

2.2.11 Masimo SETÒTechnology

Masimo SETâTechnology, combines advances in fundamental sensor technology, digital signal processing, an easily portable platform and a low noise hardware platform incorporating multiple wavelengths applicable to many physiological parameters.

Masimo’s SET

Technology is composed of three components; (1) new signal processing apparatus, (2) a new method for invivo measurement, and (3) new sensor technologies. The main benefit of Masimo’s technology is the effective cancellation of unpredictable “in-band noise” (noise which is in the same frequency, phase and/or amplitude space as the desired signal).

Conventional fixed filters, whether analog or digital form, have been designed to pass certain frequencies while rejecting others. For example, a bandpass filter with a lower cut-off frequency of 1hz and an upper cut-off frequency of 10Hz will pass all frequencies between 1hz and 10Hz and reject frequencies below 1hz and above 10Hz. Therefore, any “noise” that has a frequency outside the pass band is rejected and not considered (i.e. 120Hz due to room light and 60Hz noise from electrical lines). However, if noise exists between the pass band of 1hz and 10Hz it will enter the system with the desired signal and corrupt the measurement (i.e. patient motion at 2Hz). Fixed filters will always have this limitation.

Masimo has overcome these problems by developing a novel technique to accurately determine the noise reference (patents issued and pending); thus, making adaptive filters work in real-time even when applied to medical monitoring of widely variable and unpredictable patients. With this new technique, Masimo is able to solve the perennial problem of motion artifact in pulse oximetry.

Masimo licenses this technology to Datascope. Further technical information is available from Masimo

on the Internet at www.Masimo.com.

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Revised 12/20/00

2.2.12 Masimo Interface Board Theory of Operation

Introduction

The Accutorr Plus Masimo interface board (P/N: 0670-00-0716) provides an isolated data and power interface between the Accutorr Plus and the Masimo

MP-3 Pulse

Oximetry Module.

The patient isolation requirement for the Masimo section is 1500VAC, less than or equal to 1mA leakage current, from input connectors J1 and J4-all terminals to J2-all terminals.

The isolated DC/DC converter, T1, supplies the regulated+5DIG as required by the Masimo analog "15V used by the MS-3. The optocouplers (U1 and U2) isolate the signals used for bidirectional serial communication with the Masimo Control signal, SpO

MS-3 Pulse Oximetry Module. The digital 5V is then utilized to generate the

MS-3 Pulse Oximetry Module.

_COMM at J4 will allow the Accutorr Plus software to interrupt

the serial transmission for future options. Future interface to the Display Controller board (at J3) will provide isolated "9volts to the Front End

Theory of Operation

An overall block diagram of the interface board is shown in Figure 1 below. All data and control lines interfaced to the SpO

Module are opto isolated. Power to the SpO

Module is isolated by a DC/DC converter with the input coming directly from the CPU/LED Module.

Figure 2-12

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Chapter 2 - Theory of Operation

Detailed Description

It would be helpful to have a schematic (0387-00-0716) while reading the following circuit descriptions.

Power

The power for the interface board is supplied by the system +5V. It is used for the pull-up resistors (R1, R2 and R6) on the serial and control lines as well as the LED drive resistors (R3 and R4) on optocoupler U1. It is also the input to isolation converters T1 and T2. In addition, the system +5V is the supply voltage for optocoupler U2 and the logic gates in U3.

T1 converts the unisolated system +5V into an isolated and regulated source, +5DIG, for many uses. The converter provides suitable isolation to the specified patient limit of 1500VAC. The majority of the current from +5DIG is delivered to the MS-3 board. It also acts as the supply voltage for optocoupler U1 and the ESD protection array, U5. In addition, the digital voltage supplies the LED drive resistor (R5) on optocoupler U2.

The second largest usage for the +5DIG is as an input for the LT1373. The LT1373 is a high frequency current mode switching regulator running at approximately 250kHz. In this design, it is configured as an extremely efficient dual flyback converter. It will convert a single input voltage ranging from 2.7 to 25 volts into a positive and negative output. This design utilizes the feedback to provide +/-15VAN to the MS-3 board. The power transistor “switch” integral to the LT1373 alternately charges and discharges the output capacitor C16. C12 and C13 provide the hold-up time for the output voltages. L2-C14 and L3-C15 are additional low pass filters for the analog voltages.

Converter T2 generates an unregulated +/-9V (used for the front end). Schottky diodes CR1 and CR2 provide reverse polarity protection for T2. C10 and C11 filter the isolated +/-9V in order to reduce the ripple on each supply.

Caps C17 and C19 on the input of the two DC/DC converters are necessary to reduce the ripple reflected back on to the system +5V. This noise is generated due to the transient nature of the MS-3 loading.

Communication

The interface signals to and from the MS-3 are isolated (2500VAC) by two optocouplers, U1 and U2. The optocouplers include integrated Schmitt triggers at the outputs. This provides logic compatible waveforms without the need for external pull-up resistors. NANDs are used in the transmission lines to provide the necessary inversions for proper signal polarity and to force the optocouplers normally off. The low duty cycle of the signals also holds the power requirements to reasonable levels.

Communications with the SpO

Module take place by a CMOS level asynchronous serial

link from J1. The parameters are 8 data bits, no parity, one stop bit, with the data having “true” polarity. The baud rate is fixed at 9600 bps.

Display Controller Connections

A four pin right angled connector (J4) is available to interface with the future Display Controller board. The serial information received (TX and RX) will be used to generate a pleth waveform. The control signal (SpO

_COMM*) will be an active low signal used

to enable a download to this future board.

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Revised 12/20/00

Front End Connections

The front end section of the future Display Controller board will be provided with an unregulated +9V and –9V. These supplies will be able to sustain maximum loads of 56mA each (refer to the manufacturers data sheet for T2, CDI 109D5VFS).

2.2.13 Tone Processor Board Theory of Operation

The Accutorr Plus Tone-Processor module drives all alarms and advisory tones, generated by the LED/CPU module, to the speaker. The signal is passed through a DAC (Digital-to-Analog-Converter), which controls the rise and decay of the output tone to comply with EN-475 specification

Figure 2-13

Tone-Processor Module

Functional Block

Diagram

Device U1 is an Atmel ATmega103, 8-bit AVR microcontroller. The ATmega103 is a low-power CMOS microcontroller based on the AVR RISC architecture. Its throughput approaches one MIPS per MHz allowing optimization of power consumption versus processing speed.

U2 is a dual 8-bit DAC that interfaces to the Microcontroller. It controls the tone up/down ramping under the command of the Microcontroller, by controlling the attenuation to its input signal. The device’s chip-select and write-enable pulses are provided by the Microcontroller.

Proper hardware operation places specific requirements on the module’s software. Although specific implementation details fall beyond the scope this document, the following is an overview of the major tasks to be performed by the software.

The Microcontroller would normally be placed in a sleep state, after initialization, in the absence of a tone signal in order to conserve power. Upon the presence of an advisory tone or an alarm an interrupt is generated, which wakes up the device. The amplitude and frequency of the incoming signal is analyzed then, a replica of the input signal is generated, after approximately 25ms delay, and presented to the DAC. The tone ramp-up sequence is accomplished with dedicated I/O ports, which drives write commands and control bytes with an increasing count and to the DAC, triggered by the period of the input tone. This would result in an audible tone with rising amplitude. Upon detection of the end of the tone burst, the ramp-down sequence is entered, similar in nature to the ramp-up sequence.

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Chapter 2 - Theory of Operation

3.0 SPECIFICATIONS

CONTENTS OF THIS CHAPTER ...........................Page

3.1 Performance Specifications ..............................3-1

3.2 Safety Characteristics ..................................3-6

3.3 Physical Characteristics ................................3-7

3.4 Environmental Characteristics ...........................3-7

3.5 Electrical Ratings .....................................3-7

3.6 Agency Compliance ...................................3-8

3.7 Electromagnetic Compatibility...........................3-8

3.1 PERFORMANCE SPECIFICATIONS

Systolic Pressure Readout

Number of Digits: 3

Accuracy*: Mean error less than ± 5 mmHg, Standard deviation

less than ± 8 mmHg.

Range: Adult Mode: 55 to 260 mmHg

Pediatric Mode: 55 to 160 mmHg Neonatal Mode: 45to 120 mmHg

Diastolic Pressure Readout

Number of Digits: 3

Accuracy*: Mean error less than ± 5 mmHg, Standard deviation

less than ± 8 mmHg.

Range: Adult Mode: 30 to 200 mmHg

Pediatric Mode: 30 to 150 mmHg Neonatal Mode: 25 to 100 mmHg

*Tested per ANSI/AAMI SP10-1992 methods.

Accutorr Plus Service Manual 3-1 Chapter 3 - Specifications

Revised 12/20/00

NIBP Measurement Cycle Time

Less than 30 seconds average at 80 BPM with 180mmHg pump up pressure, without retries, motion artifact or arrhythmia with standard adult cuff on a healthy individual. Cycle time is affected by arm size and wrapping technique.

Pulse Rate

Range: 35-245 BPM for Adult and Pediatric

70-245 BPM for Neonate

Display Resolution: 1 BPM

Accuracy: ± 3 BPM or ± 3%, whichever is greater

Maximum Cuff Pressure

Two means of limiting cuff pressure are provided; a hardware over pressure monitor which limits the pressure to 330mmHg for Adults, 220mmHg for Pediatrics and 165mmHg for Neonates. A software overpressure monitor which vents if the pressure exceeds 300mmHg for Adults and 200mmHg for Pediatrics. If the hardware over pressure circuit is tripped in normal operation then the unit must be turned off and back on to reset the system.

Inflation Source

This inflation source is capable of supplying sufficient air to bring a volume of 700cc’s to a pressure of 300 mmHg in no more than 35 seconds. If the cuff is not inflated to the desired pressure within 60 seconds then the cuff is vented and a retry cycle is initiated.

Leak Rate

With the bleed valve closed, the maximum pressure drop shall be 10 mmHg in 90 seconds measured with a 700cc volume at a differential pressure of 250 mmHg.

Cuff Vent Rate

When the unit is vented, a volume of at least 700 cc’s is reduced from a pressure of 250 mmHg to a pressure of 20 mmHg in a maximum of 14 seconds.

3-2 Accutorr Plus Service Manual

Revised 06/25/99

Chapter 3 - Specifications

Temperature (Predictive)

Range: 90-110° F, 32-43° C Display Resolution: 0.1° F, 0.1° C

Accuracy: Meets ASTM E1112-86 for accuracy.

Datascope SpO

Range: 40-100% SpO

Display Resolution: 1% SpO

Display Update: Less than 4 seconds

Calibration: Factory Calibrated to Functional Saturation

Accuracy - Datascope: ± 2% from 70 - 100% SpO

± 4% from 60 - 69% SpO

unspecified from 40-59% SpO

Pulse Rate Range 30 to 250 BPM Pulse Rate Accuracy "3 BPM or 3% of the reading, whichever is greater.

Nellcor

SpO

Range: 40-100% SpO2

Display Resolution: 1% SpO

Display Update: Less than 4 seconds

Calibration: Automatic

Accuracy - Nellcor

: ± 2 digits from 70 - 100% SpO

± 3 digits from 70 - 100% SpO

unspecified from 40-69% SpO

- Adult

- Neonates

Pulse Rate Range 21 to 249 BPM Pulse Rate Accuracy "3 BPM.

Neonatal accuracy specifications are based upon testing the N-3000 and N-25 neonatal sensors on healthy adult volunteers in induced hypoxia studies, in the range of 70-100% SpO

. The specified accuracy also takes into account published literature which predicts

that there may be a small difference in % SpO

reported by the oximeter when measure

ments from adult and fetal blood with 100% fetal hemoglobin are compared. Fetal hemoglobin is present in concentrations varying from 10% to 90% in neonatal blood, and this percentage declines over time. As the percentage of fetal hemoglobin in neonatal blood declines, the theoretical effect on accuracy due to this source is reduced".

Accutorr Plus Service Manual 3-3 Chapter 3 - Specifications

Revised 02/15/00

Masimo®SpO

Range: 40-100% SpO Display Resolution: 1% SpO Display Update: Less than 4 seconds Calibration: Automatic

SpO2Accuracy Saturation during No Motion Conditions

Adults: 70% to 100% ± 2 digits Neonates: 70% to 100% ± 3 digits

unspecified.

SpO

Accuracy

Saturation during Motion Conditions:

40 to 69% SpO

Adults: 70% to 100% ± 3 digits Neonates: 70% to 100% ± 4 digits

Pulse Rate Range: 26 to 239 BPM Pulse Rate Accuracy: "3 BPM

The Masimo MS-3 pulse oximeter with LNOP Adt sensors have been validated for

no motion accuracy in human blood studies on healthy adult volunteers in induced hypoxia studies in the range of 70% to 100% SpO

against a laboratory co-oximeter

and ECG monitor. This variation equals plus or minus one standard deviation. Plus or minus one standard deviation encompasses 68% of the population.

The Masimo MS-3 pulse oximeter with LNOP Adt sensors has been validated for motion accuracy in human blood studies on healthy adult volunteers in induced hypoxia studies while performing rubbing and tapping motions at 2 to 4 Hz. At an amplitude of 1 to 2 cm and non-repetitive motion between 1 to 5 Hz. At an amplitude of 2 to 3 cm in induced hypoxia studies in the range of 70% to 100% SpO

against a laboratory co-oximeter and ECG monitor. This variation

equals plus or minus one standard deviation. Plus or minus one standard deviation encompasses 68% of the population.

3-4 Accutorr Plus Service Manual

Revised 06/19/01

Chapter 3 - Specifications

Datascope Accutorr Plus Service manual

Specifications and Main Features

Frequently Asked Questions

User Manual