Nellcor SRC-MAX Technical Manual

SRC-MAX

Pulse Oximetry
Functional Tester
Technical Manual

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Nellcor Puritan Bennett Inc. is an affiliate of Tyco Healthcare. OXIMAX is a
trademark of Nellcor Puritan Bennett Inc.

This ISM device complies with Canadian ICES-001.
Cet appareil ISM est conforme à la norme NMB-001 Canada.
To obtain information about a warranty, if any, contact Nellcor’s Technical

Services Department, or your local representative.
Purchase of this instrument confers no express or implied license under any

Nellcor Puritan Bennett patent to use the instrument with any sensor that is
not manufactured or licensed by Nellcor Puritan Bennett.

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; Re.35,122 ;
4,928,692; 4,934,372; 5,078,136; 5,351,685; 5,368,026; 5,485,847; 5,533,507;
5,662,106; and 5,853,364.

Contents

Contents .................................................................................i

Figures ................................................................................. iii

Tables .................................................................................. iv

Safety Information ........................................ ..... ..... ............. 1

Cautions ......................................................................... 1

Introduction .......................................................................... 3

Intended Use .................................................................. 3

Controls, Indicators, and Symbols ....................................... 5

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

Back Panel ..................................................................... 6

Side View ...................................................................... 6

SRC-MAX Buttons and Symbols .................................. 7

Select Options ................................................................ 8

SRC-MAX Components and Accessories ...........................9

List of Components ....................................................... 9

Optional Accessories: .................................................... 9

SRC-MAX Operation with a Pulse Oximeter or Monitor . 11

ON / OFF Operation .................................................... 11

Power-Saving Mode .................................................... 11

Introduction ................................................................. 11

Routine Maintenance .............................................. ........... 17

Cleaning ....................................................................... 17

Battery Replacement .................................................... 18

Performance Verification ................................................... 21

Introduction ................................................................. 21

Equipment Required .................................................... 21

LED Current to Photodetector Current Test ................ 22

Testing the RED LED .................................................. 23

Testing the IR LED ...................................................... 25

BPM (Beats per Minute) Test ...................................... 27

Three-Lead ECG Cable ........................................... 9

C-Lock Cable ........................................................ 10

Test Setup .............................................................. 12

Test 1: BPM (Beats per minute) ........................... 14

Test 2: Saturation (Sp0

2) ....................................... 15

Test 3: Modulation ................................................ 15

Test 4: Light .......................................................... 16

Equipment Required ............................................. 27

SRC-MAX i

Contents

Setup ......................................................................27

BPM Test (Alternate Method) ......................................29

Equipment Required: .............................................29

Setup ......................................................................29

Troubleshooting ..................................................................31

Introduction ..................................................................31

Obtaining Technical Assistance ...................................31

Troubleshooting ...........................................................31

Electromagnetic Interference .......................................32

Packing for Shipment ..........................................................35

Introduction ..................................................................35

Returning the SRC-MAX .............................................35

Specifications ......................................................................37

Controls ........................................................................37

Rate ........................................................................37

Light ....................................................................... 37

Modulation ............................................................. 37

Saturation ............................................................... 37

Performance .................................................................38

Saturation (SpO2) ..................................................38

Pulse Rate ..............................................................38

Light Levels ...........................................................38

Modulation (%MOD) ............................................38

ECG .......................................................................38

C-Lock ...................................................................38

Timing ....................................................................39

Simulated Waveform .............................................39

Power ............................................................................ 39

Physical Characteristics .........................................39

Environmental Conditions ............................................40

Standards ......................................................................40

Electrical Safety Requirements ..............................40

EMC/EMI ..............................................................41

International and European Union Compliance ....41

Index ...................................................................................43

ii

Figures

Figure 1: Front Panel..............................................5

Figure 2: Back Panel..............................................6

Figure 3: SRC-MAX Tester Side View ................... 6

Figure 4: Three-Lead ECG Cable .......................... 9

Figure 5: ECG Cable Warning Label...................... 9

Figure 6: C-Lock Cable ........................................ 10

Figure 7: DOC-10 Sensor Cable..........................13

Figure 8: SpO2 sensor/cable connector............... 13

Figure 9: Battery Compartment Access ............... 18

Figure 10: Pinout Reference SRC-MAX................. 21

Figure 11: Block Diagram....................................... 22

Contents

Figure 12: RED LED Low Light Setting..................24

Figure 13: RED LED High Light Setting................. 25

Figure 14: IR LED Low Light Setting...................... 26

Figure 15: IR LED High Light Setting..................... 27

Figure 16: 3 Volts Peak-to-Peak at 3 Hz................28

Figure 17: 200 BPM ............................................... 29

SRC-MAX iii

Contents

Tables

Table 1: Troubleshooting. . . . . . . . . . . . . . . . . . . . . . . . . . . 32

SRC-MAX iv

Safety Information

Note: In this manual, pulse oximeters refer to Nellcor

XIMAX technology-based pulse oximeters and

O

monitors refer to OEM O

monitors.

Cautions

Cautions are identified by the CAUTION symbol shown
above.

XIMAX technology-based

Cautions alert the user to exercise care necessary for the safe
and effective use of the SRC-MAX.

Caution: The case of the SRC-MAX should be opened
only by qualified service personnel. There are no user
serviceable parts inside. Opening the battery
compartment does not constitute opening the tester case.

Caution: Use your institution’s appropriate bench test
procedures when using the SRC-MAX functional tester.

Caution: Install batteries into the SRC-MAX before
using. See Routine Maintenance, page 17.

Caution: Do not open the case of the unit, as the device
could be damaged.

Caution: Do not connect ground directly to any pins on
the DB 9, as the device could be damaged. Refer to Block
Diagram, Figure 17 on page 22.

SRC-MAX 1

Safety Information

Caution: Prior to connecting the oscilloscope’s negative
terminal to the +5 volt supply (+) terminal, ensure that
the oscilloscope negative is isolated from the +5 volt
supply ground.

Caution: This device has been designed to provide
resistance to electromagnetic interference. However,
because of the proliferation of radio-frequency
transmitting equipment and other sources of electrical
noise in the health-care environment (for example,
cellular phones, mobile two-way radios, electrical
appliances), it is possible that high levels of such
interference due to close proximity or strength of a
source, may result in disruption of performance of this
device. Disruption may be evidenced by erratic readings,
cessation of operation, or other incorrect functioning. If
this occurs, the site of use should be surveyed to
determine the source of disruption, and actions taken to
eliminate the source. If assistance is required, contact
Nellcor Puritan Bennett’s Technical Services Department
or your local Nellcor Puritan Bennett representative.

Caution: Do not spray, pour, or spill any liquid on the
SRC-MAX, its accessories, connectors, switches, or
openings.

Caution: Do not use the SRC-MAX to test non-O
pulse oximeters or non-O

XIMAX OEM monitors.

XIMAX

Caution: Dispose of batteries in accordance with local
requirements and regulations.

2

Introduction

Note: In this manual, pulse oximeters refer to Nellcor

XIMAX technology-based pulse oximeters and

O

monitors refer to OEM O

monitors.

Intended Use

The SRC-MAX is intended for qualified technicians to
functionally test Nellcor O
oximeters and OEM O
The SRC-MAX tester will perform the following tests:

• Red and infrared light-emitting diode (LED) drive
circuitry

XIMAX technology-based

XIMAX technology-based pulse

XIMAX technology-based monitors.

• Heart rate (beats per minute, BPM)

• Oxygen saturation (Sp0

2)

• Light level

• Percent modulation

The SRC-MAX functional tester is designed to simulate an
operational Nellcor O

XIMAX compatible sensor and check

performance of the pulse oximeter or monitor.

SRC-MAX 3

(Blank Page)

Controls, Indicators, and
Symbols

Note: In this manual, pulse oximeters refer to Nellcor

XIMAX technology-based pulse oximeters and

O
monitors refer to OEM O
monitors.

Front Panel

XIMAX technology-based

1. Pulse oximeter/monitor cable connector 6. % Modulation select button

2. RED LED drive indicator 7. % Sp0

3. C-LOCK output connector port 8. Light level output button

4. ECG output connector port 9. Pulse rate beats per minute (BPM) button

5. Battery low indicator 10. INFRARED LED drive indicator

SRC-MAX 5

2 select button

Figure 1: Front Panel

Controls, Indicators, and Symbols

Back Panel

Side View

1. C-LOCK connector port 2. ECG Port

Figure 2: Back Panel

Figure 3: SRC-MAX Tester Side View

6

Controls, Indicators, and Symbols

SRC-MAX Buttons and Symbols

Front panel symbology for the SRC-MAX are as follows:
Pulse rate/beats per minute (BPM) selector Button

Light output selector button

Percentage of Sp0

2 selector button

Modulation selector button

Feature not available at this time

Battery low indicator

Red LED indicator

C-Lock port symbol

ECG Port symbol

IR (infrared) LED indicator

SRC-MAX 7

Controls, Indicators, and Symbols

Select Options

There are four button switches on the SRC-MAX Front Panel
with two associated LEDs.

Pulse/Beats per Minute

Light Level

% Sp0

2

Percent Modulation

The pulse oximeter or monitor will display readings for both
Saturation (Sp0

2) and Pulse Rate. The numeric displays will

correlate with the SRC-MAX control panel.

8

SRC-MAX Components and
Accessories

List of Components

(1) SRC-MAX Functional Tester
(2) AA Alkaline Batteries
(1) Technical Manual

Optional Accessories:

Three-Lead ECG Cable

See Figure 4. The three-lead ECG cable is shipped with a
warning label, Figure 5. Attach the warning label to the three­lead ECG cable before using the cable.

Figure 4: Three-Lead ECG Cable

SRC-MAX 9

Figure 5: ECG Cable Warning Label

SRC-MAX Components and Accessories

C-Lock Cable

See Figure 6.

Figure 6: C-Lock Cable

10

SRC-MAX Operation with a Pulse
Oximeter or Monitor

Note: In this manual, pulse oximeters refer to Nellcor

XIMAX technology-based pulse oximeters and

O
monitors refer to OEM O
monitors.

ON / OFF Operation

The SRC-MAX will automatically turn ON when connected
to the sensor/patient cable and a pulse oximeter or monitor
that is turned on.

The SRC-MAX will automatically turn OFF when detached
from the pulse oximeter or monitor, or if the pulse oximeter
or monitor is turned off.

XIMAX technology-based

Install two AA batteries in the battery compartment of the
SRC-MAX before connecting to the sensor/patient cable and
the pulse oximeter or monitor. Refer to Battery Replacement
on page 18.

Power-Saving Mode

When the SRC-MAX is connected to a pulse oximeter or
monitor and no buttons are pressed for 2 minutes the SRC­MAX goes into the power-saving mode. All of the LEDs turn
off, with the exception of the IR and RED LEDs. The SRC­MAX continues to function normally . Press any button on the
SRC-MAX and the LEDs will illuminate.

Introduction

The SRC-MAX functional tester allows qualified technicians
to functionally test Nellcor O
oximeters and OEM O

SRC-MAX 11

XIMAX technology-based pulse

XIMAX technology-based monitors.