NPB-295 Service Manual

Nellcor Puritan Bennett Inc. 4280 Hacienda Drive Pleasanton, CA 94588 USA Telephone Toll Free 1.800.NELLCOR Mallinckrodt Europe BV Hambakenwetering 1 5231 DD”s-Hertogenbosch The Netherlands Telephone +31.73.648.5200

Nellcor Puritan Bennett Inc. is a wholly owned subsidiary of Mallinckrodt, Inc.

To obtain information about a warranty, if any, for this product, contact Mallinckrodt Technical Services or your local Mallinckrodt representative. Purchase of this instrument confers no express or implied license under any Mallinckrodt patent to use the instrument with any sensor that is not manufactured or licensed by Mallinckrodt. Nellcor Puritan Bennett, Nellcor, Durasensor, and Oxisensor II, are trademarks of Mallinckrodt Incorporated. Covered by one or more of the following U.S. Patents and foreign equivalents: 4,621,643; 4,653,498; 4,700,708; 4,770,179; 4,869,254; 4,653,498; 5,078,136; 5,351,685; 5,368,026; 5,533,507; and 5,662,106.

TABLE OF CONTENTS List of Figures List of Tables Table Of Contents ... List Of Figures... List Of Tables ... Section 1: Introduction ... 1.1 Manual Overview... 1.2 Npb-295 Pulse Oximeter Description ... 1.3 Related Documents ... Section 2: Routine Maintenance ... 2.1 Cleaning... 2.2 Periodic Safety And Functional Checks ... 2.3 Battery ... Section 3: Performance Verification... 3.1 Introduction ... 3.2 Equipment Needed... 3.3 Performance Tests ... 3.4 Safety Tests... Section 4: Power-On Settings And Service Functions ... 4.1 Introduction ... 4.2 Power-On Settings ... 4.3 Service Functions ... Section 5: Troubleshooting ... 5.1 Introduction ... 5.2 How To Use This Section ... 5.3 Who Should Perform Repairs... 5.4 Replacement Level Supported ... 5.5 Obtaining Replacement Parts ... 5.6 Troubleshooting Guide ... 5.7 Error Codes ... Section 6: Disassembly Guide ... 6.1 Introduction ... 6.2 Prior To Disassembly ... 6.3 Fuse Replacement ... 6.4 Monitor Disassembly ... 6.5 Monitor Reassembly... 6.6 Battery Replacement ... 6.7 Power Entry Module (Pem) Removal/Installation... 6.8 Power Supply Removal/Installation... 6.9 Cooling Fan Removal/Installation... 6.10 Display Pcb Removal/Installation ... 6.11 Uif Pcb Removal/Installation... 6.12 Alarm Speaker Removal/Installation ... Section 7: Spare Parts ... 7.1 Introduction ... Section 8: Packing For Shipment...

iii v vi 1-1 1-1 1-1 1-3 2-1 2-1 2-1 2-1 3-1 3-1 3-1 3-1 3-9 4-1 4-1 4-1 4-2 5-1 5-1 5-1 5-1 5-1 5-1 5-2 5-7 6-1 6-1 6-1 6-2 6-3 6-4 6-5 6-6 6-7 6-9 6-10 6-11 6-13 7-1 7-1 8-1

iii

Table of Contents

11.10

iv

8.1 General Instructions... 8.2 Repacking In Original Carton... 8.3 Repacking In A Different Carton ... Section 9: Specifications ... 9.1 General ... 9.2 Electrical... 9.3 Physical Characteristics... 9.4 Environmental ... 9.5 Alarms ... 9.6 Factory Default Settings... 9.7 Performance... Section 10: Serial Port Interface Protocol ... 10.1 Introduction ... 10.2 Configuring The Data Port ... 10.3 Connecting To The Data Port ... 10.4 Real-Time Printout ... 10.5 Trend Data Printout... 10.6 Nurse Call ... 10.7 Analog Output ... Section 11: Technical Supplement... 11.1 Introduction ... 11.2 Oximetry Overview... 11.3 Circuit Analysis... 11.4 Functional Overview ... 11.5 Ac Input ... 11.6 Power Supply Pcb Theory Of Operation... 11.7 Battery ... 11.8 User Interface Pcb (Uif) ... 11.9 Front Panel Display Pcb And Controls ... Schematic Diagrams ...

8-1 8-1 8-3 9-1 9-1 9-1 9-1 9-1 9-2 9-2 9-2 10-1 10-1 10-1 10-2 10-3 10-6 10-6 10-7 11-1 11-1 11-1 11-2 11-2 11-3 11-3 11-4 11-5 11-8 11-9

Table of Contents LIST OF FIGURES Figure 1-1: NPB-295 Front Panel ... 1-1 Figure 1-2: User Softkey Map ... 1-2 Figure 1-3: NPB-295 Rear Panel... 1-3 Figure 3-1: NPB-295 Controls ... 3-2 Figure 3-2: Self-Test Display ... 3-2 Figure 3-3: Adjusting %SpO2 Upper Alarm Limit ... 3-3 Figure 3-4: Adjusting % SpO2 Lower Alarm Limit ... 3-3 Figure 3-5: Adjusting High Pulse Rate Alarm ... 3-4 Figure 3-6: Adjusting Low Pulse Rate Alarm ... 3-4 Figure 4-1: Service Function Softkeys... 4-2 Figure 4-2: Service Function Softkey Map... 4-3 Figure 4-3: Param Softkeys ... 4-3 Figure 4-4: Print Softkeys ... 4-4 Figure 4-5: Trend Printout... 4-5 Figure 4-6: Errlog Printout... 4-5 Figure 4-7: Instat Printout ... 4-6 Figure 4-8: INFO Printout... 4-6 Figure 4-9: Next Softkeys ... 4-7 Figure 4-10: Alarms Softkeys ... 4-7 Figure 6-1: Fuse Removal ... 6-2 Figure 6-2: NPB-295 Corner Screws ... 6-3 Figure 6-3: Separating Case Halves... 6-4 Figure 6-4: NPB-295 Battery... 6-5 Figure 6-5: Power Entry Module ... 6-6 Figure 6-6: Power Supply ... 6-7 Figure 6-7: Cooling Fan ... 6-9 Figure 6-8: Display PCB ... 6-10 Figure 6-9: UIF PCB ... 6-12 Figure 6-10: Alarm Speaker... 6-13 Figure 7-1: NPB-295 Expanded View... 7-2 Figure 8-1: Repacking the NPB-295... 8-2 Figure 10-1: Data Port Softkeys ... 10-1 Figure 10-2: Data Port Pin Layout ... 10-3 Figure 10-3: Real-Time Printout ... 10-4 Figure 10-4: Trend Data Printout ... 10-6 Figure 11-1: Oxyhemoglobin Dissociation Curve ... 11-2 Figure 11-2: NPB-295 Functional Block Diagram... 11-3 Figure 11-3: UIF PCB Front End Red/IR Schematic Diagram ... 11-11 Figure 11-4: Analog Front End Schematic Diagram... 11-13 Figure 11-5: Front End Power Supply Schematic Diagram... 11-15 Figure 11-6: SIP/SOP Interface Schematic Diagram ... 11-17 Figure 11-7: Data Port Drivers Schematic Diagram ... 11-19 Figure 11-8: CPU Core Schematic Diagram A ... 11-21 Figure 11-9: CPU Memory Schematic Diagram B... 11-23 Figure 11-10: Contrast and Sound Schematic Diagram A ... 11-25 Figure 11-11: UIF PCB Power Supply Schematic Diagram B ... 11-27 Figure 11-12: Display Interface Schematic Diagram ... 11-29 Figure 11-13: UIF PCB Parts Locator Diagram ... 11-31 Figure 11-14: Power Supply Schematic Diagram... 11-33 v

Table of Contents Figure 11-15: Power Supply Parts Locator Diagram ...11-33

LIST OF TABLES Table 3-1: Dynamic Operating Range... 3-7 Table 3-2: Earth Leakage Current Limits ... 3-10 Table 3-3: Enclosure Leakage Current Limits... 3-11 Table 3-4: Patient Leakage Current Limits... 3-12 Table 3-5: Patient Leakage Current Test Configurations Mains Voltage on the Applied Part ... 3-12 Table 4-1: Factory Default Settings... 4-2 Table 5-1: Problem Categories ... 5-2 Table 5-2: Power Problems... 5-3 Table 5-3: Button Problems... 5-4 Table 5-4: Display/Alarms Problems... 5-4 Table 5-5: Operational Performance Problems ... 5-5 Table 5-6: Serial Port Problems ... 5-6 Table 5-7: Error Codes... 5-7 Table 6-1: Power Supply Leads Connections ... 6-8 Table 7-1: Parts List ... 7-1 Table 9-1: Default Settings... 9-2 Table 10-1: Data Port Pin Outs ... 10-3 Table 10-2: Status Codes...10-6 Table 10-3: Nurse Call Relay Pin States... 10-7 Table 10-4: Rating of Nurse Call Relay... 10-7

vi

SECTION 1: INTRODUCTION 1.1 1.2 1.3

1.1

Manual Overview NPB-295 Pulse Oximeter Description Related Documents

MANUAL OVERVIEW This manual contains information for servicing the Nellcor model NPB-295 pulse oximeter. Only qualified service personnel should service this product. Before servicing the NPB-295, read the operator’s manual carefully for a thorough understanding of operation. Warning: Explosion hazard. Do not use the NPB-295 pulse oximeter in the presence of flammable anesthetics.

1.2

NPB-295 PULSE OXIMETER DESCRIPTION The NPB-295 is a portable pulse oximeter intended for use as a continuous noninvasive monitor of arterial oxygen saturation (SpO2) and pulse rate. It can be used on adult, pediatric and neonatal patients. Oxygen saturation and pulse rate are displayed digitally along with a plethysmographic waveform or a 10-segment blip bar that indicates pulse intensity. This monitor is intended for use in hospital and hospital-type facilities, during intra-hospital transport, and in home environments. Through the use of the four softkeys, the operator can access trend information, select an alarm limit to be changed, choose the language to be used, adjust the internal time clock, and change communications protocol. The NPB-295 can operate on AC power or on an internal battery. The controls and indicators for the NPB-295 are illustrated in Figures 1-1 through 1-3. 1

2 3 4

5

6

7

8

9

11

10

NPB-295

%SP02 BPM LIMITS

17

16 15 14

TREND

SETUP

13

1. SpO2 Sensor Port 2. Low Battery Indicator 3. Power On/Off Button 4. AC/Battery Charging Indicator 5. Waveform Display 6. %SpO2 Indicator 7. Pulse Beats Per Minute display 8. Alarm Silence Indicator 9. Alarm Silence Button

100 110

LIGHT

12

10. Adjust Up Button 11. Adjust Down Button 12. Contrast Button 13. Softkeys 14. Menu Bar 15. Motion Indicator 16. Pulse Search Indicator 17. Speaker

Figure 1-1: NPB-295 Front Panel

1-1

Section 1: Introduction

Figure 1-2 illustrates the various functions that are available through the use of the softkeys, and how to access them. A complete explanation of the keys is provided in the NPB-295 operator's manual.

BPM TREND

LIMITS

SETUP

Normal Display Mode

95 65

%SPO2

LIGHT LCD display backlight ON or OFF

SELECT

EXIT

Select alarm limit to be adjusted

Return to main display

VIEW

CLOCK

EXIT

NEXT

COMM BLIP

PLETH

VIEW

EXIT

NEXT

ZOOM

DUAL

SPO2

PULSE

Display SpO2 Data

Display pulse trend data

VIEW

NEXT

NEXT

EXIT

NCALL ANALOG

NEXT

Select Language

Norm + or Norm -

EXIT

0 Volt, 1 Volt, or Step

Return to main display

Select data from last 12/30 min. or last 1, 2, 4, 8, 12, or 24 hrs.

Display both SpO2 and pulse trend data

LANG

Adjust baud rate and protocol

SET

EXIT

HIST SELECT

EXIT

EXIT Return to main display

DELETE

PRINT

NEXT

EXIT

Print trends

Returns to prior menu

Return to main display

YES

NO

Deletes all trend info

Return to prior trend menu

Figure 1-2: User Softkey Map

1-2

EXIT

Section 1: Introduction 1

2

3

TM

2X T 0.50A 250V

R

IPX1 NRTL/C

5

1. Equipotential (ground) Terminal 2. AC Inlet 3. DB-15 Interface Connector (Data Port)

MADE IN U.S.A.

NELLCOR PURITAN BENNETT EUROPE BV, 's-HERTOGENBOSCH, THE NETHERLANDS

CISPR 11 Group 1 Class B

012 3

NPB-295

SN NELLCOR PURITAN BENNETT, INC. PLEASANTON, CA 94588, U.S.A.

100-120 V 200-240 V 50/60 Hz 20VA

U.S. PATENTS: 4,621,643; 4,653,498; 4,700,708; 4,770,179; 4,869,254; Re. 35,122; 4,928,692; 4,934,372; 5,078,136

4

4. Fuse Receptacle 5. Voltage Selection Switch

Figure 1-3: NPB-295 Rear Panel 1.3

RELATED DOCUMENTS To perform test and troubleshooting procedures, and to understand the principles of operation and circuit analysis sections of this manual, you must know how to operate the monitor. Refer to the NPB-295 operator’s manual. To understand the various Nellcor sensors that work with the monitor, refer to the individual sensor’s directions for use.

1-3

(Blank Page)

SECTION 2: ROUTINE MAINTENANCE 2.1 2.2 2.3

2.1

Cleaning Periodic Safety and Functional Checks Battery

CLEANING Caution: Do not immerse the NPB-295 or its accessories in liquid or clean with caustic or abrasive cleaners. Do not spray or pour any liquid on the monitor or its accessories. To clean the NPB-295, dampen a cloth with a commercial, nonabrasive cleaner and wipe the exterior surfaces lightly. Do not allow any liquids to come in contact with the power connector, fuse holder, or switches. Do not allow any liquids to penetrate connectors or openings in the instrument cover. Wipe sensor cables with a damp cloth. For sensors, follow each sensor's directions for use.

2.2

PERIODIC SAFETY AND FUNCTIONAL CHECKS The NPB-295 requires no calibration. The battery should be replaced every 2 years. See Battery Replacement on 6-5. The following checks should be performed at least every 2 years by a qualified service technician.

2.3

1.

Inspect the exterior of the NPB-295 for damage.

2.

Inspect safety labels for legibility. If the labels are not legible, contact Mallinckrodt Technical Services Department or your local Mallinckrodt representative.

3.

Verify the unit performs properly as described in paragraph 3.3.

4.

Perform the electrical safety tests detailed in paragraph 3.4. If the unit fails these electrical safety tests, do not attempt to repair the NPB-295. Contact Mallinckrodt Technical Services Department or your local Mallinckrodt representative.

5.

Inspect the fuses for proper value and rating (F1 & F2 = 0.5 amp slow blow).

BATTERY Mallinckrodt recommends replacing the instrument's battery every 2 years. When the NPB-295 is going to be stored for 3 months or more, remove the battery prior to storage. To replace or remove the battery, refer to Section 6, Disassembly Guide. If the NPB-295 has been stored for more than 30 days, charge the battery as described in paragraph 3.3.1. A fully discharged battery requires 14 hours with the monitor in standby, or 18 hours if it is in use, to receive a full charge. The battery is being charged whenever the instrument is plugged into AC.

2-1

(Blank Page)

SECTION 3: PERFORMANCE VERIFICATION 3.1 3.2 3.3 3.4

3.1

Introduction Equipment Needed Performance Tests Safety Tests

INTRODUCTION This section discusses the tests used to verify performance following repairs or during routine maintenance. All tests can be performed without removing the NPB-295 cover. All tests except the battery charge and battery performance tests must be performed as the last operation before the monitor is returned to the user. If the NPB-295 fails to perform as specified in any test, repairs must be made to correct the problem before the monitor is returned to the user.

3.2

3.3

EQUIPMENT NEEDED Equipment

Description

Digital multimeter (DMM)

Fluke Model 87 or equivalent

Durasensor  oxygen transducer

DS-100A

Oxisensor  II oxygen transducer

D-25

Pulse oximeter tester

SRC-2

Safety analyzer

Must meet current AAMI ES1/1993 & IEC 601-1/1998 specifications

Sensor extension cable

SCP-10 or MC-10

Serial interface cable

EIA-232 cable (optional)

Stopwatch

Manual or electronic

PERFORMANCE TESTS The battery charge procedure should be performed before monitor repairs whenever possible. Note:

3.3.1

This section is written using Mallinckrodt factory-set defaults. If your institution has preconfigured custom defaults, those values will be displayed. Factory defaults can be restored using the configuration mode procedure described in paragraph 4.3.3.

Battery Charge

Perform the following procedure to fully charge the battery. 1.

Connect the monitor to an AC power source.

2.

Verify the monitor is off and that the AC Power/Battery Charging indicator is lit.

3-1

Section 3: Performance Verification

3. 3.3.2

Charge the battery for at least 14 hours in standby.

Power-up Performance

The power-up performance tests (3.3.2.1 through 3.3.2.2) verify the following monitor functions: •

Power-On Self-Test

•

Power-On Defaults and Alarm Limit Ranges Power On/Off

Alarm Silence

NPB-295

%SP02 BPM LIMITS

TREND

SETUP

100 110

LIGHT

Softkeys

Contrast Adjust Adjust Down Up

Figure 3-1: NPB-295 Controls 3.3.2.1

Power-On Self-Test

1.

Connect the monitor to an AC power source and verify the AC Power/Battery Charging indicator is lit.

2.

Do not connect any input cables to the monitor.

3.

Observe the monitor front panel. With the monitor off, press the Power On/Off button. The monitor must perform the following sequence. a.

Within 2 seconds all LEDs are illuminated, then all pixels on the LCD display are illuminated, after which the backlight comes on.

b.

The indicators remain lighted.

c.

The LCD display shows the Nellcor Puritan Bennett logo and the software version of the NPB-295 (Figure 3-2). NPB-295

Nellcor Puritan Bennett NPB-295 Version 1.1.0.5

Figure 3-2: Self-Test Display

3-2

Section 3: Performance Verification

3.3.2.2

d.

A 1-second beep sound indicating proper operation of the speaker, and all indicators turn off except the AC Power/Battery Charging indicators.

e.

The NPB-295 begins normal operation.

Power-On Defaults and Alarm Limit Ranges

Note:

When observing or changing default limits, a 10-second time-out is in effect. If no action is taken within 10 seconds, the monitor automatically returns to the monitoring display.

Note:

The descriptions that follow are based on the assumption that Pleth is the view that has been selected. The steps to change an alarm limit are the same if the view being used is Blip.

1.

Ensure that the monitor is on. Press and release the Limits softkey. Verify the monitor emits a single beep and the plethysmograph waveform is replaced with a display of the alarm limits. The high alarm limit for %SpO2 will indicate an alarm limit of “100” inside a box (Figure 3.3). NPB-295

ALARM LIMITS BPM SPO2 170 100 UPPER 85 LOWER 40 SELECT

%SP02 BPM

100 110

EXIT

Figure 3-3: Adjusting %SpO2 Upper Alarm Limit 2.

Press the Limits softkey. Press and hold the Down Arrow button. Verify the boxed number for %SpO2 upper alarm limit reduces to a minimum of “85.”

Note:

A decimal point in the display indicates that the alarm limits have been changed from factory default values.

3.

Press the SELECT softkey. Verify the monitor emits a single beep and the box moves to the %SpO2 lower alarm limit of “85”. NPB-295

ALARM LIMITS BPM SPO2 170 100 85 40

UPPER LOWER SEL

%SP02 BPM

100 110

EXIT

Figure 3-4: Adjusting % SpO2 Lower Alarm Limit 4.

Press and hold the Down Arrow button and verify the %SpO2 lower alarm limit display reduces to a minimum of “20”.

5.

Press and hold the Up Arrow button and verify the %SpO2 lower alarm limit display cannot be raised past the upper alarm limit setting of “85”.

6.

Press the Exit button.

3-3

Section 3: Performance Verification

7.

Press the Limits softkey then press the SELECT softkey two times Verify the monitor emits a beep after each keystroke. The Pulse upper alarm limit should be “170” and should be boxed. NPB-295

ALARM LIMITS BPM SPO2 170 100 85 40

UPPER LOWER SEL

%SP02 BPM

100 110

EXIT

Figure 3-5: Adjusting High Pulse Rate Alarm 8.

Press and hold the Down Arrow button. Verify the minimum displayed value is “40” for the Pulse upper alarm limit.

9.

Press the exit button.

10.

Press the Limits softkey then press the SELECT softkey three times. Verify the Pulse lower alarm limit display indicates an alarm limit of “40” and is boxed. NPB-295

ALARM LIMITS SPO2 BPM 170 100 UPPER 85 LOWER 40 SEL

%SP02 BPM

100 110

EXIT

Figure 3-6: Adjusting Low Pulse Rate Alarm

3-4

11.

Press and hold the Down Arrow button. Verify the boxed Pulse lower alarm limit display reduces to a minimum of “30”.

12.

Press and hold the Up Arrow button and verify the boxed Pulse lower alarm limit display cannot be adjusted above the Pulse high limit of “40”.

13.

Press the Power On/Off button to turn the monitor off.

14.

Press the Power On/Off button to turn the NPB-295 back on.

15.

Press and release the Limits softkey. Verify the %SpO2 upper alarm limit display is boxed and indicates an alarm limit of “100”.

16.

Press the SELECT softkey. Verify the %SpO2 lower alarm limit display is boxed and indicates an alarm limit of “85”.

17.

Press the SELECT softkey a second time. Verify the Pulse upper alarm limit display is boxed and indicates an alarm limit of “170”.

18.

Press the SELECT softkey a third time. Verify the Pulse lower alarm limit display is boxed and indicates an alarm limit of “40”.

19.

Press the Power On/Off button to turn the monitor off.

Section 3: Performance Verification 3.3.3

Hardware and Software Tests

Hardware and software testing includes the following tests:

3.3.3.1

•

Operation with a Pulse Oximeter Tester

•

General Operation

Operation with a Pulse Oximeter Tester

Operation with an SRC-2 pulse oximeter tester includes the following tests:

3.3.3.1.1

•

Alarms and Alarm Silence

•

Alarm Volume Control

•

Pulse Tone Volume Control

•

Dynamic Operating Range

•

Nurse Call

•

Analog Output

•

Operation on Battery

Alarms and Alarm Silence

1.

Connect the SRC-2 pulse oximeter tester to the sensor-input cable and connect the cable to the monitor. Set the SRC-2 as follows: SWITCH RATE LIGHT MODULATION RCAL/MODE

POSITION 38 LOW OFF RCAL 63/LOCAL

2.

Press the Power On/Off button to turn the monitor on. After the normal power-up sequence, press the following softkeys; Setup, View, and Pleth. Verify the %SpO2 and Pulse initially indicates zeroes.

3.

Move the modulation switch on the SRC-2 to LOW.

4.

Verify the following monitor reactions: a.

The plethysmograph waveform begins to track the artificial pulse signal from the SRC-2.

b.

The pulse tone is heard.

c.

Zeroes are displayed in the %SpO2 and Pulse displays.

d.

After about 10 to 20 seconds, the monitor displays saturation and pulse rate as specified by the tester. Verify the values are within the following tolerances: Oxygen Saturation Range = 79% to 83% Pulse Rate Range = 37 to 39 bpm

e. 5.

The audible alarm sounds and both the %SpO2 and Pulse displays flash, indicating that both parameters have violated the default alarm limits.

Press and hold the Alarm Silence button on the front of the monitor for less than 3 seconds.

3-5

Section 3: Performance Verification

3.3.3.1.2

6.

Verify the %SpO2 display indicates “60” and the Pulse display indicates “SEC” while the Alarm Silence button is pressed.

7.

When the button is released the alarm is silenced.

8.

With the alarm silenced, verify the following: a.

The alarm remains silenced.

b.

The Audible Silence indicator lights.

c.

The %SpO2 and Pulse displays continue to flash.

d.

The pulse tone is still audible.

e.

The audible alarm returns in approximately 60 seconds.

9.

While pressing the Alarm Silence button, press the Down Arrow button until the Pulse display indicates “30”.

10.

Press the Up Arrow button and verify the displays indicate 60 SEC, 90 SEC, 120 SEC, and OFF. Release the button when the display indicates “OFF”.

11.

Press and release the Alarm Silence button. Verify the Alarm Silence Indicator flashes.

12.

Wait approximately 3 minutes. Verify the alarm does not return.

13.

After 3 minutes, the alarm silence reminder beeps three times, and will continue to do so at approximately 3-minute intervals.

Alarm Volume Control

After completing the procedure in paragraph 3.3.3.1.1: 1.

3-6

Press and hold the Alarm Silence button and verify the following: a.

“OFF” is displayed for approximately 3 seconds.

b.

After 3 seconds: •

a steady tone is heard at the default alarm volume setting

•

the %SpO2 display indicates “VOL”

•

the Pulse display indicates the default setting of 5.

2.

While still pressing the Alarm Silence button, press the Down Arrow button until an alarm volume setting of 1 is displayed.

3.

Verify the volume of the alarm has decreased but is still audible.

4.

Continue pressing the Alarm Silence button and press the Up Arrow button to increase the alarm volume setting to a maximum value of 10.

5.

Verify the volume increases. Press the Down Arrow button until a comfortable audio level is attained.

6.

Release the Alarm Silence button. The tone stops.

Section 3: Performance Verification 3.3.3.1.3

3.3.3.1.4

Pulse Tone Volume Control

1.

Press the Up Arrow button and verify the beeping pulse tone sound level increases.

2.

Press the Down Arrow button and verify the beeping pulse tone decreases until it is no longer audible.

3.

Press the Up Arrow button to return the beep volume to a comfortable level.

Dynamic Operating Range

The following test sequence verifies proper monitor operation over a range of input signals. 1.

Connect the SRC-2 to the SCP-10 or MC-10, which is connected to the NPB295, and turn the NPB-295 on.

2.

Place the SRC-2 in the RCAL 63/LOCAL mode.

3.

Set the SRC-2 as indicated in Table 3-1.

Note:

An “*” indicates values that produce an alarm. Press the Alarm Silence button to silence the alarm. Table 3-1: Dynamic Operating Range SRC-2 Settings

RATE

LIGHT

MODULATION

SpO2

Pulse Rate

38

HIGH2

LOW

79 - 83*

35 - 41*

112

HIGH1

HIGH

79 - 83*

109 - 115

201

LOW

LOW

79 - 83*

198 - 204*

201

LOW

HIGH

79 - 83*

198 - 204*

Note: 4. 3.3.3.1.5

NPB-295 Indications

Allow the monitor several seconds to stabilize the readings. Verify the NPB-295 readings are within the indicated tolerances.

Nurse Call

Note:

The Nurse Call tests must be performed with the instrument operating on AC power.

1.

Connect the negative lead of a voltmeter to pin 5 and positive to pin 11 of the data port on the back of the instrument (Figure A-2 in Appendix). Ensure that the audible alarm is not silenced or turned off.

2.

Set the SRC-2 to create an alarm condition.

3.

Verify an output voltage at pins 5 and 11 between +5 and +12 volts DC.

4.

Press the Alarm Silence button. With no active audible alarm, the output voltage at pins 5 and 11 must be between -5 and -12 volts DC.

5.

With the instrument in an alarm condition, use a DVM to verify there is no continuity between pins 8 and 15 and that there is continuity between pins 7 and 15.

3-7

Section 3: Performance Verification

6.

3.3.3.1.6

Adjust the alarm limits so that there is no alarm condition. Use a DVM to verify there is continuity between pins 8 and 15 and that there is no continuity between pins 7 and 15.

Analog Output

Note: 1.

Connect the negative lead of a voltmeter to pin 10 and positive to pin 6 of the data port on the back of the instrument (Figure A-1 in Appendix).

2.

Press the following softkeys: Setup, Next, Next, and Analog. Press the 1-volt softkey.

3.

Verify the output voltage is 1.0 ± 0.025 volts DC.

4.

Leave the negative lead connected to pin 10 and verify 1.0 ± 0.025 volts DC on pins 13 and 14.

Note:

Move the positive lead back to pin 6.

6.

Press the following softkeys; Setup, Next, Next, and Analog. Press the 0-volt softkey.

7.

Verify the output voltage is 0.0 ± 0.025 volts DC.

8.

Leave the negative lead connected to pin 10 and verify 0.0 ± 0.025 volts DC on pins 13 and 14.

9.

If step 8 takes more than 2 minutes to complete, the analog output will time out. Repeat step 2 to initiate the analog output. Disconnect the voltmeter from the instrument.

Operation on Battery Power

1.

With the instrument operating on AC, turn on the backlight.

2.

Disconnect the instrument from AC and verify the AC/Battery Charging indicator and the backlight turn off.

3.

Verify the instrument continues monitoring normally and that the low battery indicator is not lit.

Note: 4. 3.3.3.2

If step 4 takes more than 2 minutes to complete, the analog output will time out. Repeat step 2 to initiate the analog output.

5.

Note:

3.3.3.1.7

The Analog Output tests must be performed with the instrument operating on AC power.

If the low battery indicator is illuminated, perform the procedure outlined in step 3.3.1. Connect the instrument to AC and verify the backlight and AC/Battery Charging indicator turn on and that the instrument is monitoring normally.

General Operation

The following tests are an overall performance check of the system:

3-8

•

3.3.3.2.1

LED Excitation Test

•

3.3.3.2.2

Operation with a Live Subject