Novametrix 615 Service manual

Download

Page 1

HAND-HELD

CAPNOGRAPHY

Service Manual

Model 615

Mar 23, 2000

Catalog No. 9425-90-00

Novametrix Medical Systems Inc.

5 Technology Drive

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

Page 2

Page 3

About This Manual

Revision Histor

Declaration of Conformity with European Union Directives

This manual is intended for use by technical personnel for servicing the Model 615. Refer to the Model 615 User’s Manual (Cat. No. 9425-23) for detailed information on normal operation.

TIDAL WAVE and CAPNOSTA Inc. Nafion is a registered trademark of Dow Corning Corp. The Model 615 is Year 2000 compliant.

Copyright 2000 Novametrix Medical Systems Inc. This document contains information which is proprietary and the property of Novametrix Medical Systems Inc., and may not be reproduced, stored in a retrieval system, translated, transcribed or transmitted in any form, or by any means, without prior explicit written permission from Novametrix Medical Systems Inc.

23-Mar-00 Release, revision 00

are registered trademarks. Cidex is a trademark of Arbook,

The authorized representative for Novametrix Equipment is:

European Compliance Services Limited Oakdene House Oak Road Watchfield Swindon, Wilts SN6 8TD UK

Manufacturing, Quality and Safety

Novametrix manufacturing facility is certified to ISO 9001 and EN46001 (MDD93/42/EE Annex II). Novametrix Medical Systems Inc. products bear the “CE 0086” mark. The product is certified by Underwriter’s Laboratories (UL) to bear the UL mark; and tested by TUV Rheinland to IEC601-1 / EN60601-1.

Rev. 00

Model 615 Service Manual

iii

Page 4

[This page intentionally blank.]

Manufacturing, Quality and Safety

Model 615 Service Manual

Rev. 00

Page 5

General Description .....................................................................................................1

Indication for use .........................................................................................................1

Keypanel Controls and Indicators ...............................................................................1

Connections and Labeling ...........................................................................................3

Principle of operation ..................................................................................................3

Safety .............................................................................................................................4

Theory of Operation .....................................................................................................7

Digital Control System .................................................................................................7

Background Mode Debugging .........................................................................11

System Memory ...............................................................................................11

Serial Communications ....................................................................................12

User Interface Control Circuitry .......................................................................12

Real Time Clock, Power on RESET Generation and Glue Logic .................... 13

CO2 System Analog Subsections .............................................................................13

Source Drive ............................................................................................13

CAPNOSTAT® CO2 sensor Case and Detector Heater Control ....................15

Input Signal Path .....................................................................................16

CAPNOSTAT® CO2 sensor Interface .............................................................16

Barometric Pressure Circuitry ..........................................................................16

Sampling Pump ...............................................................................................17

Digital and Analog Control Lines .....................................................................17

Power Supply and Battery Charger ...........................................................................18

Supply and Reference Voltage Generation .....................................................18

Battery Charger Circuitry .................................................................................20

Functional Tests .........................................................................................................23

Equipment Required .................................................................................................23

Procedure ..................................................................................................................23

Power up .........................................................................................................23

Capnography Tests .........................................................................................24

Sidestream Tests .............................................................................................25

Miscellaneous Tests ........................................................................................25

Accuracy Tests ...........................................................................................................27

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

Procedure ..................................................................................................................27

Electronic Tests ..........................................................................................................31

Equipment Required .................................................................................................31

Test Procedure ..........................................................................................................31

Safety Testing ...........................................................................................................34

Status Messages ........................................................................................................35

System Messages .....................................................................................................35

Capnography Messages ...........................................................................................35

Maintenance ................................................................................................................37

General ....................................................................................................................37

Rev. 00

Model 615 Sevice Manual

Page 6

Contents

Maintenance Schedules ............................................................................................37

Cleaning and Sterilization ......................................................................................... 38

Monitor, BaseStation and External Power Supply .......................................... 38

CAPNOSTAT® CO

Single Patient Use Airway Adapters ............................................................... 38

External Sampling System Components ......................................................... 38

Internal Sampling System Components .......................................................... 38

Battery Maintenance .................................................................................................39

AC/Battery Operation ...................................................................................... 39

Battery Status and Alerts ................................................................................ 40

Removing and Installing the Battery ............................................................... 41

Charge using External Power Supply ............................................................. 41

Charge using optional BaseStation ................................................................. 42

Charging with External Charger ...................................................................... 42

AA Lithium Batteries ........................................................................................ 43

Battery Life and Recharge Times .................................................................... 44

Assembly Exchanges ................................................................................................ 44

Disassembling the Monitor .............................................................................. 44

Reassembling the monitor .............................................................................. 47

Serial Communications/Power Interface Connector ................................................. 47

Software Update Instructions .................................................................................... 48

Equipment Required ....................................................................................... 48

Setup ...............................................................................................................48

Procedure ........................................................................................................ 48

Specifications ............................................................................................................. 53

Specifications ............................................................................................................ 53

General ........................................................................................................... 53

Capnograph .................................................................................................... 53

EtCO2 Section (Mainstream) ..........................................................................53

Respiratory Rate (Mainstream) ....................................................................... 53

EtCO2 Section (Sidestream) ........................................................................... 54

Respiratory Rate (Sidestream) ........................................................................ 54

Monitor Specifications ............................................................................................... 54

Additional Features ......................................................................................... 55

Accessories ................................................................................................................ 57

Sensor ........................................................................... 38

Model 615 Service Manual

Rev. 00

Page 7

General Description

Power key

Page key

Backlight key

Battery charge indicator

Alert key

Adapter key

AC indicator

Display screen

and LED

Alert LED

Section 1

1.1 Indication for use

The Model 615 hand-held, portable Capnograph is intended to be used for monitoring end tidal CO

and respiration rate in monitoring environments such as ventilatory support, emergency

and anesthesia. The Model 615 incorporates a miniature vacuum pump to draw expired respiratory gases through the CAPNOSTAT nasal cannula. The Model 615 is designed to monitor adult, pediatric and neonatal patients and is not intended for any other purpose.

Components of this product and its associated accessories which have patient contact are

free of latex.

1.2 Keypanel Controls and Indicators

General Description

CO2 Sensor using a sampling airway adapter and

NOTE

Rev. 00 Model 615 Service Manua

Switches power on/off.

Displays, Capnogram, EtCO

enter the PRINT SELECTION menu.

Sets 2 minute silence and displays the SET ALERTS menu. Press and hold for

3 seconds to disable audible alerts. Press and hold again to cancel.

The Alert Key LED:

Steady yellow: audio silenced for 2 min., no alert in progress.

Flashing yellow: audio off , no alert in progress.

Flashing red and yellow: alert in progress; audio is off or

trend or respiration rate trend. Press and hold to

2 minute silence.

Page 8

Section 1

General Description

Press to set adapter type. Press and hold for 4 seconds to zero adapter.

Press to turn backlight on/off, or press and hold to adjust contrast.

INDICATORS

Illuminates when on battery power. Green; battery is fully charged, slow flashing yellow; battery power is low (approximately 20 minutes of operation), Fast flashing red; battery is exhausted (approximately 5 minutes of operation).

Green when the monitor is connected to an AC power source.

ICONS

Audible alerts permanently silenced.

Audible alert silenced for two minutes.

Alert limits disabled.

Indicates adapter key.

Time/Date Icon

Indicates backlight key.

Displayed beside any Trend screen.

Displayed when performing an adapter zero and the sensor is not at operating temperature.

Displayed when performing an adapter zero and breaths are detected.

Displayed when CAPNOSTAT are detected.

CO2 sensor is attached to patient and breaths

SYMBOLS

Patient isolation: Identifies connection as type BF

Attention: Consult manual for detailed information

Model 615 Service Manual Rev. 00

Page 9

General Description

Sa mpling sy ste m inpu t

Sam pling system output

Endview Model 615

Rearview Model 615

RS232 connection

DC input

Battery c om pa rtme nt

Sideview Model 615

and external power input from BaseStation

1.3 Connections and Labelin

Section 1

Sampling System: Gas output

Sampling System: Gas input

DC input. Connect external power supply to this port. Use only Novametrix

external power supply, Catalog number 9220-10.

Recyclable item. This symbol is found on the internal battery and should not

concern the common user. Refer to qualified service personnel when battery

replacement is required.

1.4 Principle of operation

The Model 615 uses the CAPNOSTAT® CO2 sensor to measure CO2 by using the infrared absorbtion technique, which has endured and evolved in the clinical setting for over two decades and remains the most popular and versatile technique today.

The principle is based on the fact that CO specific wavelengths, with the amount of energy absorbed being directly related to the CO concentration. When an IR beam is passed through a gas sample containing CO2, the electronic signal from the photodetector (which measures the remaining light energy) can be obtained. This signal is then compared to the energy of the IR source and calibrated to accurately reflect C

concentration in the sample. To calibrate, the photodetector’s response

to a known concentration of CO channel accounts for optical changes in the sensor, allowing the system to remain in calibration without user intervention.

Rev. 00 Model 615 Service Manua

is stored at the factory in the monitor’s memory. A reference

molecules absorb infrared (IR) light energy of

Page 10

Section 2

Safety

Section 2

For maximum patient and operator safety, you must follow the following warnings and cautions.

Indicates a potentially harmful condition that can lead to personal injury.

•

Explosion Hazard:

of this instrument in such an environment may present an explosion hazard.

•

Electrical Shock Hazard:

before cleaning it. Refer servicing to qualified service personnel.

•

Failure of Operation:

situation has been corrected by qualified personnel.

• Do not operate Model 615 if it appears to have been dropped or damaged.

• Do not operate Model 615 or its accessories when it is wet due to spills or condensation.

• Never sterilize or immerse the monitor, sensor or accessories in liquids.

• The monitor does not alert for NO RESPIRATION if the airway adapter is removed from the CAPNOSTAT

• Verify the “No Resp Timer” setting prior to use.

• Do not position any sensor cable in a way that may cause entanglement or strangulation.

• The Model 615 is not intended to be used as a primary diagnostic apnea monitor and/or recording device.

• The external battery charger should NOT be used to recharge the battery near or in close proximity to patients and/or other medical equipment in operation. It is intended for use in service areas only (i.e. nurses station, biomed lab, etc.).

• Connection of an external device (e.g. printer or computer) to the RS232 serial port on the BaseStation may compromise patient safety.

DO NOT

If the monitor fails to respond as described, do not use it until the

CO2 sensor.

Safety

WARNINGS

use Model 615 in the presence of flammable anesthetics. Use

Always turn Model 615 off and remove any external devices

CAUTIONS

Indicates a condition that may lead to equipment damage or malfunction.

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

• Use only an external power supply approved by Novametrix for use with this device. Use of any other power supply may damage the Model 615 and void the warranty.

• Do not operate Model 615 or its accessories when it is wet due to spills or condensation.

• Do not operate Model 615 if it appears to have been dropped or damaged.

• Keep Model 615 and its accessories clean.

• Inspect the integrity of the Model 615 and its accessories prior to use.

• Never sterilize or immerse the monitor, sensor or accessories in liquids.

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

• Do not apply excessive tension to any sensor cable or pneumatic tubing.

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

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

Model 615 Service Manual Rev. 00

Page 11

Safety

Section 2

• If a Single Patient Use Sampling Adapter becomes occluded, replace and discard the adapter.

• It is recommended that the CAPNOSTAT

CO2 sensor be removed from the circuit whenever an aerosolized medication is delivered. This is due to the increased viscosity of the medications which may contaminate the sensor windows, causing the sensor to fail prematurely.

• Where electromagnetic devices (i.e. electrocautery) are used, patient monitoring may be interrupted due to electromagnetic interference. Electromagnetic fields up to 3V/m will not adversely affect system performance.

• Refer servicing to qualified personnel.

NOTES

Indicates points of particular interest or emphasis for more efficient or convenient operation.

• The Model 615

monitor is intended for operation with Novametrix Single Patient Use airway

adapters.

• Operating the Model 615

below 50°F (10°C) will result in longer warm-up time and reduce

battery life.

• Components of this product and its associated accessories which have patient contact are free of latex.

• Certain rebreathing circuits, or the presence of artifacts such as cardiogenic oscillations, may cause Model 615 to react to non-respiratory CO

fluctuations as if they were breaths.

This condition affects only the RESP numerical displays; the capnogram display continues to provide an accurate picture of the CO

waveform.

• After the life cycle of our equipment and all accessories has been met, disposal of the equipment should be accomplished following the national requirements. Contact the local Novametrix representative for questions concerning disposal.

Rev. 00 Model 615 Service Manua

Page 12

Section 2

Safety

[This page intentionally blank.]

Model 615 Service Manual Rev. 00

Page 13

Section 3

The Model 615 is a microprocessor based handheld instrument that measures the clinica parameters of CO the Model 615 is explained in detail in the subsections that follow.

3.1 Digital Control System

Refer to 2754-03 schematic sheet 1.

Embedded control for the system is provided by IC1, a Motorola MC68332 integrated microcontroller. In addition to a full 32-bit Central Processing Unit (CPU), this device also contains circuitry for system clock generation, peripheral chip select generation, data control, interrupt generation, a sophisticated timing coprocessor, synchronous serial communication and asynchronous serial communication. In general, functional signals are grouped together into ports, and each signal can be independently programmed by software to be its predefined port function or as discrete I/O. Additionally, the functionality for several ports (Port C, E and F) can be predefined by the state of the data bus on system power-up. A special “background mode” port allows the device to be controlled by an external source for system debugging and testing. Also integrated on-chip are several activity monitors, as well as a software watchdog to ensure proper device and system operation. Refer to table 1.

production and respiration rate (RR). The electronic theory of operation of

Theory of Operation

Table 1: CPU Port Functions

Functionality Control ,

Port Defined Function

TPU 16 Channels

QSM 4 Synchronous Serial Chip Selects & one asynchronous serial channel

Background Mode System debugging Allows an appropriate external

Timing Signal Generation Each channel independently user

programmable as TPU function or as Discrete I/O

Serial Communications Port: QSPI: Queued Serial Peripheral Interface SCI: Serial Communications Interface

QSPI chip selects independently user programmable, can be used as Discrete I/O or decoded to create up to 16 chip selects. SCI transmit can be programmed as Discrete I/O

device to control the microprocessor and system

Data Bus Control

(Alt Functions: D pulled low)

Rev. 00 Model 615 Service Manua

Page 14

Section 3

Theory of Operation

Table 1: CPU Port Functions

C Chip Selects D0: CSBOOT* data width, 8 or 16-

bit D1: CS1*-CS3* or BR*,BG*,BGACK* D2: CS3*-CS5* or FC0-FC2 D3-D7: CS6*-CS10* or A19-A23

E Bus Control D8: Control Signals or discrete I/O

F MODCK and Interrupts D9: MODCK & IRQ or discrete I/O

The maximum operating frequency of the integrated processor is 20.97 MHz. The operating frequency is software selectable and generated by an internal VCO operating from Y1, a

32.768KHz watch crystal. The Timing Processor Unit (TPU) coprocessor of the MC68332 provides timing generation derived from the system clock. This feature is utilized to control the precise timing required for the acquisition of the end tidal carbon dioxide (EtCO

) signals. The

TPU is also use to generate the PWM (Pulse Width Modulation) control for the CAPNOSTAT CO2 sensor case and detector heaters, as well as to provide the frequency generation for the audio tones. See Tables 2 & 3.

Table 2: TPU Timing Generation for the EtCO

subsystem

Signal Name Description Function / Timing

CO2AZ Auto Zero Clears the sample/hold circuitry

prior to data acquisition. Active high, 2.84 ms

CO2PWENB Pulse Width Enable Defines the active time for both

phases of the bipolar source pulse, used for pulse width protection circuitry. Active high, 830 µs

SRCDRV0 Source Drive 0 First source drive signal.

Active high, 405 µs

CS*/H Current Sample/Hold Enables circuitry for source cur-

rent measurement. Sample is taken when SRCDRV0 is active. Low = sample, 270 µs, High = hold

SRCDRV1 Source Drive 1 Second source drive signal

delayed for 30 microseconds after SRCDRV0 ends. Active high, 395 µs

Model 615 Service Manual Rev. 00

Page 15

Theory of Operation

Section 3

Table 2: TPU Timing Generation for the EtCO

SS*/H Signal Sample/Hold Enables circuitry for CO

subsystem

and

reference channel data acquisition. Low = sample, 270 µs, High = hold

CASEPWM Case Heater PWM PWM control for the case

heater servo

DETPWM Detector Heater PWM PWM control for the detector

heater servo

TONE Audio Tone Generation Variable frequency outputs to

generate system audio

CASEOT Case Heater Over Temperature Case heater over temperature

shut down

DETOT Detector Heater Over Temperature Detector heater over tempera-

ture shut down

Ferrite and L-C filters, 100pF capacitors, and 100 ohm resistors have been placed on selected microprocessor signals with fast rise and fall times (including timing, clock, and address and data lines) in order to help reduce and suppress the radiation of electromagnetic interference and decouple unwanted power supply noise. In addition, good EMI/EMC design techniques have been incorporated in the component layout and printed circuit board layout and manufacture.

Table 4 lists the chip select, control and discrete I/O functions for the

Model 615

system module. On power-up, Ports E and F are programmed as discrete inputs by pulling down their controlling data lines, DB8 and DB9. After power-up, the software sets up each pin function individually and performs a series of self tests to check the integrity of the system. The state of configuration inputs on Port E (TST*, CNFG0*, CNFG1*, and CNFG2) are read. These inputs allow the software to identify different operating states such as Test Mode, or different hardware configurations. After the initialization period is complete and all system functions have been set,

Rev. 00 Model 615 Service Manua

Page 16

Section 3

Theory of Operation

the LED output (PF0) toggles at a 1Hz rate switching transistor Q3 which drives the status LED D3, indicating that the system is ready for operation.

Table 3: Chip Select, Control and Discrete I/O

Port Pin Functions System Signal Name I/O Comments

C D0 pulled low, D1-D7 pulled high, pins are chip select on power-up

CSBOOT* ROMOE* O Program PROM chip select

byte wide mode, (8-bits) D0 = LOW

CS0* / PC0 / BR* SRAMWR* O SRAM write enable

CS1*/ PC1 / BG* AUD_CS* O Audio attenuation control chip

select

CS2* / PC2 / BGACK*

CS3* / PC3 / FC0 ROMWR* O FLASH PROM Write Enable,

CS4* / PC4 / FC1 DISPCS1* O LCD chip select #1

CS5* / PC5 / FC2 DISPCS2* O LCD chip select #2

CS6* / PC6 / A19 LATCH1_CS* O System control signals latch 1

CS7* / PC7 / A20 LATCH2_CS* O System control signals latch 2

CS8* / PC8 / A21 ROMWREN O Port C discrete output, prevents

CS9* / PC9 / A22 PROFILE* O Enables software profiling data

CS10* / ECLK / A23

SRAMRD* O SRAM read enable, byte mode

Byte Mode

chip select

unintentional writes to FLASH EPROM. This signal must be asserted before ROMWR* in order to overwrite the flash.

output latch

ECLK O Enable clock for the liquid crystal

display

Model 615 Service Manual Rev. 00

Page 17

Theory of Operation

Section 3

Table 3: Chip Select, Control and Discrete I/O

E D8 pulled low, discrete I/O on power-up

DSACK0* / Port E0TST* I Initiate system TEST if low

DSACK1* / Port E1DS1* I Data and size acknowledge 1*

AVC* / Port E2CNFG0* I Configuration switch 0

RMC* / Port E3CNFG1* I Configuration switch 1

DS* / Port E4DS* O Data strobe

AS* / Port E5 AS* O Address strobe

SIZ0* / Port E6 CNFG2* I Configuration switch 2

SIZ1* / Port E7 SLP* I Not used in Model 615

R/W* WR* O Data write strobe

F D9 pulled low, discrete I/O on power-up

MODCK / Port F0 LED O LED CPU activity Indicator

IRQ1* / Port F1 SW1 I Keypanel switch 1 input

IRQ2* / Port F2 SW2 I Keypanel switch 2 input

IRQ3* / Port F3 SW3 I Keypanel switch 3 input

IRQ4* / Port F4 SW4 I Keypanel switch 4 input

IRQ5* / Port F5 PWRKEY I Power key status input

IRQ6* / Port F6 EXTDCIN I Indicates external AC mains

power operation

IRQ7* / Port F7 NMI I Non-maskable interrupt

Background Mode Debugging

External system debugging is possible by connecting an appropriate device (emulator or debugger) to header J401 and momentarily bring the BERR* (J401/2) low. This halts the bus activity and turns control of the system over to the external device. In this mode, internal MPU registers can be viewed and altered, special test features can be invoked and system memory can be read and written to.

System Memory

An 8-bit wide data path is used for FLASH PROM and SRAM transfers. Program code storage is contained in a 1-Meg 5V FLASH or EEPROM (IC2) device. The FLASH PROM is protected from unintentional overwrites of the program code by transistor Q1 and the ROMWREN signal.

Rev. 00 Model 615 Service Manua

Page 18

Section 3

Theory of Operation

The ROMWREN line must be high prior to writing new code into the FLASH devices. Nonvolatile data storage is contained in the 1-Meg SRAM (IC3). The SRAM is backed-up to retain it’s contents by applying a voltage on VBACKUP generated by BT1 (a 3.0V lithium battery) when power is off or the battery is removed from the monitor. During the battery backup state, transistor Q2 keeps the CS1* control of the SRAM in the inactive state. This forces the data bus to a high impedance state, isolating the SRAM from the rest of the system. True nonvolatile storage for the bootstrap parameters for the CAPNOSTAT

CO2 sensor are stored

in a serial EEPROM (IC2) located on the Interface (2753) board.

Serial Communications

Refer to 2754-03 schematic sheet 6.

The on-chip (IC1) asynchronous serial communications interface (SCI) channel is contained in the MC68332. The signals are level shifted to standard RS232 levels by IC26 which is a Dual RS232 Communications Driver/Receiver. The transmitters in the RS232 level shifter are under software control to minimize the patient leakage current to the rear panel connector (J101 when communication is not active. The signal COMMPWR controls the transmitters operation and is derived from IC9 pin 14 (schematic sheet 2). The serial connection to external, nonpatient contact devices is electrically isolated from the patient through the CAPNOSTAT sensor airway adapter. This connector, J101 is located on the rear panel and is designed to interface with external devices (i.e. computer, printer) when placed in a base station which contains the mating connector. In addition there is a 4 pin connector (J403) available for test and service which offers an internal connection to the serial communications at a TTL level. The data signals ASRxD and ASTxD are logic level signals and are diode protected against over voltage by D22 and D23 should IC26 breakdown from ESD (schematic page 6). Refer to Table 5 for the pinout and signals of serial interface connector J101.

Table 4: Power/Communications 6-pin modular connector J101 located on the rear panel.

Pin Number Signal Function

1 RxD Internal MC68332 UART Receive, RS232 Signal, Level

Shifted

2 TxD Internal MC68332 UART Transmit, RS232 Signal, Level

Shifted

3 DGND Digital Ground

4 DGND Digital Ground

6 +VCHG External DC input supply to power unit and battery charger

User Interface Control Circuitry

Refer to 2754-03 schematic sheet 2.

The user interface features a 64 row by 128 column Liquid Crystal Display (LCD) module with an LED backlight. A 5-switch membrane keypanel is provided for operator entry. The use interface also contains three LED’s which represent various system conditions.

Control of the user interface is provided by the LATCH1_CS* chip select signal together with the Port F input signals from the microprocessor. SW1-SW4 are inputs which read in the

Model 615 Service Manual Rev. 00

Page 19

Theory of Operation

Section 3

present state of the membrane keys. Depressing a key causes the signal line to be pulled low in contrast to its normally high state. IC9 provides a latched output for controlling the status LED’s. The LCD backlight is a series of LED’s which are driven by a 5.12kHz clock signal in order to lower the LCD backlight power requirement and is activated by the backlight membrane key. The LITE_CLK signal is a 5.12kHz logic level signal generated by IC7 (sheet

7) which modulates the LED backlight through FET switch Q4 (BKLGHT_OUT) when asserted by IC10 (BACKLIGHT). This signal is capacitively coupled by C42 in order to prevent the backlight from remaining on in the event of a system failure.

Contrast control for the LCD is provided by DAC IC33 (sheet 6) and amplifier IC34A and transistor Q18 (schematic sheet 6). When the CPU detects a press and hold of the backlight membrane key, the CPU sends a digital ramp input to the DAC which causes the output to change accordingly. Inverting amplifier IC34A controls the base current into transistor Q18, which changes the level of the display contrast voltage, VDISP.

Refer to schematic sheet 6.

An audio frequency tone is generated by the TPU (Time Processor Unit) of the MC68332 (TONE). This signal is fed into the divider network consisting of R183 and IC32. IC32 is a 10k

ohm E for attenuating the signal under CPU control. From the divider output the signal is amplified by IC34B and Q17 which drives the system speaker (LS1) to produce system audio. The AUD_EN line from IC9 controls Q19, when high the input to IC34B is grounded thus muting the audio.

potentiometer whose value (when written to under software control) provides a means

Real Time Clock, Power on RESET Generation and Glue Logic

Refer to 2754-03 schematic sheets 1 and 2.

Time-keeping for date and time stamping of patient trend information is provided by IC8. This device contains a built-in crystal for precise time and date measurement. In the absence of digital power, the time keeping function is maintained by the battery backed supply, VBACKUP which is generated by the 3V lithium backup battery (BT1).

On power-up, the system is forced into a “Reset” state by IC4 (sheet 1). When the suppl voltage VDD, approaches 1V, the SRST* line is asserted to prevent undefined operation. IC4 also provides supervision over the VDD logic supply. If the logic supply falls below 4.55V ±120mV then IC4 generates a reset condition until the supply returns to a safe level. Inverter IC5 is used to generate the active high RESET signal.

The

Model 615

the glue logic required is a minimum. Chip selection for the serial peripherals is provided by decoding the queued serial module (QSM) (PCS0-PCS3) of the microprocessor IC1 (sheet 1 on schematic) using decoder IC12 (sheet 2) while parallel interface peripherals are selected by the internal chip select registers of Port C (BOOTCS* and CS0*:CS10*). Latch IC10 is used to control the saturation analog signal processing, the LCD backlight, the sidestream sampling pump, and to power the monitor off.

makes use of the high level of integration offered by the MC68332. Therefore

3.2 CO2 System Analog Subsections

CO2 Source Drive

Refer to 2754-03 schematic page 3 and Table 2 of this document.

The source drive circuitry is designed to drive the source with a bipolar signal to prevent the migration of charges within the source that may result from unidirectional electrical fields. The

Rev. 00 Model 615 Service Manua

Page 20

Section 3

Theory of Operation

resistance of the source is monitored constantly to ensure the integrity of the system by sampling the current through the source while it is active.

The SRCDRV0 and SRCDRV1 lines are used to control the bipolar signal that drives the source. The SRCDRV0 signal goes high as soon as the CO2AZ (Auto Zero) line goes low and the CO2PWENB (Pulse Width Enable) line goes high. The duration of SRCDRV0 is 405 us (microseconds), and drives the source in the positive direction. The SRCDRV1 line drives the source with an opposite polarity signal when high for the same duration. There is a 30 us delay from the time the SRCDRV0 line goes low to when the SCRDRV1 line goes high. This delay is to prevent the possibility of both SRCDRV0 and SRCDRV1 being active at the same time, thus creating a low impedance path between the two supplies (power supply shoot-through). SRCDRV1 steers current through the source in an opposite direction from SRCDRV0.

When SRCDRV0 and CO2INH (Inhibit) are high, the output of MOSFET Driver IC13A pin 7 will go low. This turns the P-Channel half of MOSFET Q5 on. At the same time, the output of MOSFET Driver IC14B pin 6 will be high biasing on the N-Channel half of MOSFET Q6 on. With both Q5B P-Channel and Q6A N-Channel on, current will flow from +VSRC through Q5B to the positive source terminal, then back from the source negative terminal through Q6A, through R97 to -VSRC. When SRCDRV0 returns low, both Q5B and Q6A are turned off and no current flows through the source. After the 30 us delay, SRCDRV1 will go high. The output of IC14A pin 8 will go high, biasing the N-Channel section of MOSFET Q5 on. The output of IC13B pin 5 will go low, turning the P-Channel of Q6 on. Current will now flow from +VSRC through Q6B to the source negative terminal, back from the source positive terminal through Q5A and R97 to VSRC. Current will cease to flow when SRCDRV1 goes low. The bridge circuit of Q5 and Q6 in effect switches the polarity of the drive signal of the source between +VSRC and -VSRC. CO2PWENB also falls with the falling edge of SCRDRV1, signaling the end of source activity.

When current flows through the source, it will also flow through current sensing resistor R97, creating a differential voltage proportional to the source current:

= (VSR / RSR) * RS * A

SRC

=voltage out of difference amplifier proportional to current

SRC

V(DA)

where:

through the source element = 24V +/- 0.625V

=differential voltage across the source element

=resistance of the source element

=resistance of the current sensing resistor = 1 ohm

=difference amplifier gain = 5

V(DA)

=[120 (Volts*Ohms) / SR]

SRC

The voltage signal out of difference amplifier IC15B is level shifted through C52 and fed to the sample and hold IC16A via buffer amplifier IC15A. A low level on the CS*/H (Current Sample and Hold) signal allows the source current signal to be sampled. On the rising edge of CS*/H, the present voltage level of the source current signal is held and appears at the input to channel A2 of the Analog to Digital Converter IC6 (sheet 2 on schematic) for processing by the MPU. When CO2AZ is high, the input to the sample and hold of IC16A is grounded to discharge any residual charge that may be on C52.

In order to prevent the source from being driven until the system is up and ready, there i protection circuitry that inhibits the source drive until enabled. During system power-up, the RESET line keeps Q7 on. This causes the CO2INH line to be brought low, preventing source pulses by pulling down SRCDRV0 and SCRDRV1 through D6. Protection circuitry also guards against extended pulse width as well as shortened duty cycle. On the rising edge of CO2PWENB, the trip point of IC17B is exceeded, allowing C55 to charge through R100. If the

Model 615 Service Manual Rev. 00

Page 21

Theory of Operation

CAPNOSTAT® CO2 sensor Case and Detector Heater Control

Section 3

SRCDRV signals do not turn the Source Pulse off within 200 us after the 830 us pulse period, the trip point for IC17A will be exceeded, pulling the CO2INH line low turning the Pulse off. After the CO2PWENB signal returns low, capacitor C57 discharges through R101, keeping the output of comparator IC17B at the voltage acquired by C55. After approximately 10.4 ms, C57 will have discharged below the comparator trip point. The comparator output goes low, discharging C55 and the circuit is ready for the next source pulse cycle.

Refer to 2754-03 schematic sheet 4.

The temperature of the system directly affects its ability to accurately measure CO therefore must be precisely maintained at a controlled value. Two separate heaters and control circuitry are used; one regulates the temperature of the detectors for the CO reference channels; the other regulates the temperature of the transducer case (and loosely maintains the temperature of the airway adapter). While the purpose of the detector heater is to keep the detectors' sensitivity to infrared radiation constant, the function of the case heater is to keep condensation from forming on the airway windows by elevating the window temperature above the ambient airway temperature. Both heaters use an efficient pulse-width modulation scheme designed to decrease power consumption, with the PWM timing generated by the TPU under microprocessor control. This control loop is run by the CPU which does the calculations and passes the duty cycle to the TPU. For the purpose of describing the regulation loop, the case heater circuitry will be considered. The detector and case heater circuitry are identical.

Inside the CAPNOSTAT module. Initially, the CAPNOSTAT

CO2 sensor, a sensing thermistor is thermally connected to the heater

CO2 sensor is at the ambient temperature and the resistance of the thermistor is large. A small current flows through the signal path “CASETHERM” and only a small voltage is developed across R117. The microprocessor programs the TPU to allow a maximum duty cycle of 90% to power the PWM heater circuitry. This causes the heater control MOSFET Q9B to be pulsed on and off with a duty cycle that is under direct control of the program software. As the heater warms up the case, the thermistor's resistance decreases, raising the voltage appearing at the input of the control loop. As described below, the MPU looks at this voltage and decreases the duty cycle of the PWM control circuitry, gradually reducing the power output into the heater. When the desired temperature set point is reached, a balance is struck between the energy delivered to the system and the heat flow out of the system.

The case thermistor is sensed by amplifier IC18A pin 3. The difference between the signal at the non-inverting input and the reference appearing at the inverting terminal generates an error voltage proportional to the sensed temperature at the amplifier's output:

and

data and

(V) = [83.133V / (Rth+3.32K)] - 10.2V where:

= amplifier output voltage

= resistance of the thermistor = 4.36933K at 45°C

Te m p (

where e

C) = 4.1288 (°C/V) * e

= amplifier output voltage at temperature T

V + 41.7321°C

o (T)

This error voltage is low pass filtered by amplifier IC20A, sent to the ADC (IC6) and processed by the CPU to regulate the output pulses from the TPU. The TPU PWM signal is buffered by MOSFET Driver IC19A and capacitively coupled to the gate of the heater drive MOSFET, Q9B. Capacitive coupling the signal prevents a system fault that would allow the PWM to be stuck at a level that would cause too high of a heater output. In the absence of a pulse, the gate drive

Rev. 00 Model 615 Service Manua

Page 22

Section 3

Theory of Operation

will be pulled high, disabling the output to the heater. The pulsed voltage signal out of the MOSFET is filtered by D12, L6, C68 and C69 to produce a DC output level for the heater. Since the TPU generated PWM signal is based on the system clock, it is synchronized with the generation of the source pulse timing. This minimizes the effect of any random disturbance caused by the heater circuit on the detection of the CO

data and reference signals.

The error voltage out of amplifier IC18A also appears at the temperature watchdog comparator IC17C. If the error voltage reaches a voltage equivalent to 56 degrees Celsius, the comparator trips, turning Q10 off. The gate of MOSFET Q9A is pulled high by R116, which turns it off and VHTR is prevented from reaching the source of transistor Q9B. The temperature of the sensor is also monitored by the MPU which will disable the heater when a temperature of 50 degrees Celsius is exceeded. To shut off the heater, the MPU asserts the CASEOT signal, turning Q11 on which turns Q10 and Q9A off.

CO2 Input Signal Path

Refer to 2754-03 schematic sheet 5.

The signals from the sensor “CO2DATAIN” (CO have similar signal paths. The CO2DATAIN passes through a high pass filter with a gain of 3.8 consisting of C80, R148 and buffer amplifier IC21B. The signal is fed to a Butterworth low pass filter IC21A and associated components. This filter has a gain of 2 with a corner frequency of

1.5 KHz. The output from the low pass filter is fed to a 12-bit digital to analog converter IC22. The signal, “CO2DIN” comes into the reference of the DAC, which acts as a programmable gain stage followed internally by an amplifier with a fixed gain of 2. Here under processor control the signal's gain is adjusted to an acceptable level for conversion. The gain setting is adjusted using the digitized signal out of the A/D Converter (IC6) as part of the feedback loop. Similarly, “CO2REFIN” is conditioned by high pass filter IC21D with a gain of 1.75 and low pass filter IC21C with a gain of 2. The equivalent fixed gains for the two input signals are not equal in order to compensate for differences in the output signal levels of the infra-red detectors in the sensor.

The output from IC22 is buffered by IC24A and AC coupled through C91 to IC23A. The “CO2DATAIN” signal received from the sensor is ac coupled prior to the initial gain stage and high pass filtered to remove any DC bias by C80. Prior to sampling CO (Auto Zero) pulse biases Q15 on, causing any residual charge on C91 to discharge to ground. At the start of the source pulse, the “CO2AZ” pulse goes low and the CO is attained, and appears at the input of the sample and hold amplifier, IC16B. Near the end of the source pulse, the “SS*/H” (Signal Sample and Hold) goes low and the peak signal is acquired on the internal sample and hold capacitor. “SS*/H” returns high at the end of the cycle, and the CO

signal on the sample capacitor is held at the peak value. The signal then passes

through a low pass filter of R159 and C92 before being converted by the ADC into digital data and analyzed by the processor. The signal “CO2REFIN” follows an identical zeroing and acquisition path.

Data) and “CO2REFIN” (reference signal)

signal, the “CO2AZ”

signal from the sensor

CAPNOSTAT

CO2 sensor

Interface

Refer to schematics 2754-03 sheet 5 and 2753-03 sheet 1.

Twenty pins of 60 pin connector J404 interface the CAPNOSTAT

CO2 sensor with the system electronics. Ferrite and L-C filters have been placed on selected lines to suppress radiated EMI and reduce susceptibility from external sources of interference.

Barometric Pressure Circuitry

Refer to 2754-03 schematic sheet 6.

Model 615 Service Manual Rev. 00

Page 23

Theory of Operation

Sampling Pump

Section 3

IC28 is a piezoresistive differential pressure transducer with port P2 held as close to 0 psi (a perfect vacuum) as is possible. It measures the absolute pressure difference at port P1 relative to the vacuum at port P2. The transducer is calibrated for a full scale output of 0 to 15 psi, has internal temperature compensation and is designed to be driven by a constant voltage source. Instrumentation amplifier IC30 conditions this signal to correspond to the current barometric pressure, which is set by adjusting VR1. The nominal gain of this amplifier is 93.56, which corresponds to an ADC count of 3800 at 760 mmHg. The output signal from IC30 is low pass filtered by IC29A and appears as an input (ABPRESS) to the 12-bit ADC.

Refer to 2754-03 schematic sheet 2.

To enable the monitoring of non-intubated patients, a single tapered sampling port is provided on the sensor interface panel. Voltage regulator IC49 adjusts the pump motor speed to set the flow rate of air through the tubing system for 180ml/min. Resistor’s R275 and R277 set the voltage to approximately 2.5V. VR2 is a potentiometer in parallel with R277, which can be installed if more accuracy is required for a flow rate adjustment. Pump motor current is sensed by measuring the voltage developed across resistor R278 using amplifier IC50 that provides a gain of 63. This provides an output of 8mA per 1/2 Volt { ADC, or approximately 2.5 uA per bit resolution {Vref 31 Hz filter composed of IC29B provides high frequency attenuation. The VPUMP signal is digitally converted by IC6 and monitored by the processor.

= (I

/ (212*Gain)}* {4mA/V}. A two-pole

(ADC)

*R) / Gain} into the 12-bit

pump

Digital and Analog Control Lines

Refer to 2754-03 schematic sheet 2.

IC10 is enabled by the LATCH2_CS* line from the processor, the D8-D15 data lines then control the following signals:

SPO2CAL Not used

SPO2SC1 Not used

SPO2LPON Not used

INSIG Not used

SIGND Not used

BACKLIGHT Used with LITE_CLK for display’s backlight control

POWER_ON Powers the monitor down (active low)

PUMP_CTRL Controls sampling pump

Analog signals in the system are converted to digital values by IC6 then analyzed by the processor

CO2DATA CO2 data channel

CO2REF CO2 reference channel

CO2ISRC Current through CO2 sensor’s source

CO2CASE CO2 sensor case temperature

CO2DET CO2 sensor detector temperature

ABPRESS Barometric pressure

SPO2FEDC Not used

Rev. 00 Model 615 Service Manua

Page 24

Section 3

Theory of Operation

SPO2IRLED Not used

VPUMP Monitors current through the sampling pump

VBATTADC Battery voltage level

3.3 Power Supply and Battery Charger

Supply and Reference Voltage Generation

Refer to 2754-03 schematic sheet 8.

The monitor operates from either an isolated external DC power supply or from the internal battery. There are two options presently for the internal battery, a Nickel Metal Hydride battery pack (NiMH), or a Disposable AA Lithium cell pack. The NiMH battery pack operates from a nominal voltage of 7.2V down to 6.0V while the AA Lithium pack operates from 10.5V down to

6.0V. This battery voltage range is monitored in hardware by the 12-bit ADC for level and comparator IC37A in order to shut the unit down at approx. 6.0V. The NiMH battery can be charged either externally via a separate charger or internally when the DC input is connected and a NiMH battery is installed. The internal battery charging circuitry is located on the 275301 assembly and is described in a later section of this document. The Lithium battery pack has a schottkey diode in series with the positive battery terminal to prevent accidental charging of the Lithium cells.

The core of the power supply design for the system is a 500 KHz switching regulator, IC36, that utilizes a flyback transformer configuration to generate the analog DC supply voltages. The primary of the transformer is designed to accept 6.0 to 13 V DC input and provides secondary outputs of nominally +13.75VDC, and -13.75VDC which are regulated by R204 and R210 off of the +VA supply. These supplies (±VA) feed all of the analog circuitry in the monitor. All supplies are L-C filtered to minimize noise in the analog front end. An additional switching regulato (IC41) generates the 5VDC supply (VDD) which feeds all the logic circuitry in addition to a filtered version (CVDD) which supplies the logic level requirements of the CO data converters e.t.c.). The 5V supply is L-C filtered to provide clean logic supplies for the analog sections of the CO clean, well regulated supplies (±CVA) for the CAPNOSTAT designed as a tracking regulator pair to provide a 24VDC differential voltage for powering the CAPNOSTAT

CO2 sensor source (+VSRC, -VSRC). Power for the CAPNOSTAT® CO2 sensor

(CVDD) system. IC35 and IC40 are linear regulators which provide

CO2 sensor. IC38 and IC39 are

heaters is supplied by VDCIN for maximum efficiency.

signal path (i.e.

Model 615 Service Manual Rev. 00

Page 25

Theory of Operation

Section 3

Refer to Table 6 for power supply breakdown.

Table 5: Power Supply and Reference Outputs

Signal Supply Description

VDCIN +6.0 V to +13 VDC Main DC input generated from external DC input or inter-

nal battery.

VBATT +6.0 V to +10.2

VDC

VBACKUP +2.5 VDC or +5

VDC

VHTR VDCIN

Internal battery DC input, max level dependent on battery installed.

Supply for SRAM and real time clock, either VDD or 2.5V to maintain SRAM data during power down.

Supply for the CAPNOSTAT

CO2 sensor case and

detector heaters, supplied by battery or external DC input. When powered by battery heater power follows input power.

VDD +5 VDC Regulated digital logic supply .

CVDD +5 VDC Regulated and filtered logic supply for CO

analog front

end.

+VA +13.75 VDC (nomi-

Tightly regulated +13.75V DC supply.

nal)

+CVA +12 VDC Linearly regulated and filtered positive supply for the

CAPNOSTAT

CO2 sensor and CO2 front ends.

+VSRC +12 VDC Linearly regulated and filtered positive supply for the

CAPNOSTAT

CO2 sensor source. Tracks -VSRC to pro-

vide a 24V +/- 2.5% differential voltage across the source.

-VSRC -12 VDC Linearly regulated and filtered negative supply for the CAPNOSTAT

CO2 sensor source. Tracked by +VSRC to

provide a 24V +/- 2.5% differential voltage across the source.

-VA -13.75 VDC (nomi-

Loosely regulated off of the +13.75VDC feedback line.

nal)

- CVA -12 VDC Linearly regulated and filtered negative supply for the

CAPNOSTAT

CO2 sensor and CO2 front ends.

CVREF +2.5 VDC Buffered reference for the A/D converter.

2CVREF +5.0 VDC

Buffered reference used in the CAPNOSTAT

CO2 sen-

sor heater control circuitry.

-2CVREF -5.0 VDC Buffered reference used for the contrast control circuitry.

VREFO/2 +1.25 VDC Buffered reference used for DC excitation for the baro-

metric pressure sensor

Rev. 00 Model 615 Service Manua

Page 26

Section 3

Theory of Operation

Table 5: Power Supply and Reference Outputs

SPO2VLED 0 to 2.5 VDC Not used

VDISP -6.5 to -11.5 VDC Negative bias supply for the LCD used to adjust the con-

trast level.

Refer to 2754-03 schematic sheet 6.

Stable reference voltages for the sensors and analog circuitry are derived from IC25, a precision 2.5V reference generator with low drift. Five (2CVREF) and 2.5 Volt (CVREF) references for the CO

circuits are generated by IC27, while a separate –5.0 Volt (-2CVREF)

supply is generated directly from IC31A for –VA and -VD on the 20 bit ADC’s for the saturation front end.

Refer to 2753-03 schematic

When the monitor is operated from the DC input power source the green AC ON indicator on the front panel is lit. If DC input power is lost or is not available, the monitor automaticall operates from its internal battery without interruption. The AC ON indicator is extinguished and a BATTERY LED on the front panel lights up, indicating the current voltage level of the battery. While on internal DC power, the current state of the battery is monitored by both software and hardware (IC37 2754-03 schematic sheet 8). Should the battery power level get critically low, the monitor software alerts the user. If the monitor is not placed on external DC input power within approximately five minutes, the software will shut the unit off. Should the software fail to turn the monitor off when the low battery alarm sounds, the hardware cutoff (IC37A) activates (+VBATT=6.0V), turning the unit off. The trend memory data stored in SRAM is retained by the presence of VBACKUP power which is generated by a 3 Volt on-board Lithium battery.

Battery Charger Circuitry

Refer to 2753-03 schematic sheet 1.

The internal NiMH battery (7.2V, 3Ahr) will charge when the monitor is connected to the external DC power supply (9220-10) or installed in the Base Station option (PN. 6998-00) with the external adapter connected to the Base Station.

Battery charging is controlled by IC1, a frequency modulated fast charge controller. IC1 monitors temperature, voltage, and time throughout the charging process to safely and effectively charge the internal battery. The charger is configured to terminate charging using the (delta temperature/delta time) method of charge termination. Charging is maintained at the C/ 4 (750mA) rate while current to the battery is controlled by Q1, Q2, Q3, and the “MOD” output of IC1. Q3 provides base drive for Q1 while Q2 serves to shut Q1 off very quickly on a cycle by cycle basis, allowing the large currents required for charging to pass through Q1 which is a surface mount SOT-23 package PNP transistor capable of 500mW’s of power dissipation.

Charge current is monitored at the SNS input (IC1/9) and is set by R13 (I 2*R

). Temperature is monitored using the battery’s internal thermistor, in conjunction with

SNS

R9, R10, and R12. R9, R10, and R12 set the deltaT/dt charge termination parameter to 1°C per minute. R7 and R8 set the maximum temperature for charge termination (a safety override) to 45°C.

Battery charging is initiated in one of two ways: either by applying 13.0 VDC to +VCHG, therefore providing VCC (BVDD) to IC1; or by inserting a rechargeable battery into the battery compartment. Resistors R2 and R4 form a divider which sets the battery voltage window. If a battery with a voltage below the lower threshold (V

, end discharge voltage, V

EDV

0.4*BVDD +/- 30mV or, 2.04V, +VBATT = 5.26V) is installed, the charger will remain in maintenance mode until the threshold is reached. Conversely, if the battery exceeds the upper

= 0.2225V/

REG

EDV

Model 615 Service Manual Rev. 00

Page 27

Theory of Operation

Section 3

threshold for maximum cell voltage (V

, maximum cell voltage, V

MCV

= 0.8*BVDD +/- 30mV

MCV

or, 4.08V, +VBATT = 10.5V), charging will terminate. After fast charge is terminated, either by deltaT/dt or by time-out, the charger switches over to a maintenance charge of C/64 to keep the battery topped off. BVDD (VCC for IC1 and D4, the AC on indicator) is regulated by D10, a 5.1V zener diode, while R3 keeps D10 operating in the knee region and C5 and C6 provide filtering.

Over-current protection is provided by F1, a 1A slo-blo replaceable fuse. Reverse leakage protection is provided by D5 and D6 which prevent the battery from trying to power BVDD and +VCHG in the battery operation state.

Rev. 00 Model 615 Service Manua

Page 28

Section 3

Theory of Operation

[This page intentionally blank.]

Model 615 Service Manual Rev. 00

Page 29

Section 4

The Functional Test verifies overall functional integrity of the monitor and sensor. If the Model 615 monitor does not pass these tests, remove from use and contact the Novametrix Service Department for repair/replacement assistance.

Functional Tests

4.1 Equipment Required

1. Single Patient Use Adult Airway Adapter PN: 6063-01

2. Single Patient Use Neonatal Airway Adapter PN: 6312-01

3. NiMH rechargeable battery pack PN:400043 or equivalent, (batteries (7) “AA” 1.5V PN: 400050 and case PN: 6862-01, if supplied)

4. External DC power supply PN: 9220-10 and hospital grade line cord PN: 600026

5. Single Patient Use Sampling Adapter PN: 8954-01

6. Sample line tubing and cannula

4.2 Procedure

Power up

1. Visually inspect the monitor and verify that there is no external damage.

2. Open hinged cover and install the NiMH rechargeable battery pack (fully charged) PN: 400043 into the unit.

3. Connect the external DC power supply PN: 9220-10 to an AC outlet using a hospital grade line cord, then plug the other end into the unit under test.

4. Verify the LED on the keypanel illuminates.

5. Power the unit up by pressing the POWER key on the keypanel. The monitor will display “Novametrix Medical Systems Inc. Model 615 Checking System” then the adapter mode that was last selected and the current setting for the alert limits (enabled or disabled). The keypanel LEDs will illuminate in sequence during the power up sequence.

6. Verify the monitor displays “CAPNO WARMING” then “CHECK ADAPTER” at the top of the display.

Rev. 00 Model 615 Service Manua

Page 30

Section 4

Functional Tests

7. Press both and keys simultaneously to display the configuration settings. Before changing any parameter record the current settings so that the unit may be

returned to its’ original configuration. Use the PAGE and SELECT keys to set

the following parameters (these are also the factory default settings):

GAS COMPENSATION ROOM AIR

CO2 WAVEFORM SCALE MEDIUM

CO2 WAVEFORM SPEED MEDIUM

NO RESP TIMER 20 sec.

CO2 UNITS mmHg

ALERT VOLUME HIGH

RS232 INTERFACE NOVACOMM

WAVEFORM FILL UNFILLED

ETCO

AVERAGING 10 SEC

ALERT LIMITS DISABLED

RESP TREND SCALE MEDIUM

AUTO POWER OFF ENABLED

When all the parameters are set press the ADAPTER key to exit.

Capnography Tests

8. Press the ADAPTER key and use the SELECT key to select ADULT, then press EXIT

9. Connect a Single Pateint Use Adult Airway Adapter PN: 6063-01 to the CAPNOSTAT

10. Press the PAGE key to display the CO

11. Breathe into the airway adapter at a normal breath rate for at least 30 seconds, verify both the readings and the waveform displayed on the unit are acceptable.

CO2 sensor. (Perform adapter zero only if requested by the monitor).

Waveform Screen.

Sample Waveform*

*(Waveform appearance will vary depending upon breath rate and CO

Model 615 Service Manual Rev. 00

waveform speed.)

Page 31

Functional Tests

Section 4

12. Stop breathing into the adapter and verify an alert condition after approximately 20 seconds (alert LED flashing red and an audio alert). Press the ALERT key and verify the alert tone silences. Verify a 2 minute audio silence is initiated and the LED on this key is flashing red then yellow.

13. Press the PAGE key until the ETCO

Trend Screen is displayed, verify a trend

waveform is present (waveform starts from right).

14. Press the ALERT key.

15. Change the airway adapter on the CAPNOSTAT

CO2 sensor from the adult to the

neonatal.

16. Verify that “CHECK ADAPTER” is displayed.

17. Press the ADAPTER key and use the SELECT key to select NEONATAL, press EXIT . Verify the unit is in the Neonatal Mode as indicated by the “NEO” on the screen. (Perform adapter zero only if requested by the monitor).

Sidestream Tests

18. Connect a Single Patient Use Sampling Adapter to the CAPNOSTAT CO2 sensor.

CAPNOSTAT CO

connect cannula to here

sensor

sampling adapter

19. Press the ADAPTER key then use the SELECT key to select SAMPLING, press EXIT . Verify the sampling pump turns on.

20. With all sources of CO

removed from the adapter and tubing, press and hold the

ADAPTER key for 4 seconds, then use the ZERO key to zero the adapter.

21. When the zero is complete, remove the Single Patient Use Sampling Adapter and verify the pump turns off. Attach a Single Patient Use Adult Adapter.

22. Press the ADAPTER key and use the SELECT key to select ADULT, then press EXIT

Miscellaneous Tests

23. Press the Backlight key and verify that the back light turns off. Press the backlight

key again and verify the back light turns on.

24. Press and hold the Backlight key and verify that the display contrast is adjustable from light to dark. Set the contrast of the display to a viewable level.

25. Remove the external DC power supply from the unit and verify that the AC ON LED is off and the Battery LED is illuminated (green).

Rev. 00 Model 615 Service Manua

Page 32

Section 4

Functional Tests

26. Power the unit down then power it back up again. Ensure the monitor functions properly on battery operation.

27. Power the unit down and remove the rechargeable battery pack from the unit. NOTE: The following steps do not apply if the monitor does not have an “AA” battery pack.

28. Install (7) seven “AA” batteries into the battery case PN:6862-01 ensuring proper polarity.

29. Install the battery case into the unit, power up the unit and ensure it functions properly on battery power.

30. Turn the unit off by pressing the Power key. Remove the battery pack from the unit. Remove the “AA” batteries from the battery case.

Model 615 Service Manual Rev. 00

Page 33

Accuracy Tests

Section 5

The Accuracy Test verifies the performance accuracy of the Model 615. This test is typically performed in conjunction with (after) the Functional Tests described on page 23. If the monitor does not pass the accuracy test, remove from use and contact the Novametrix Service Department for repair/replacement assistance.

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

Accuracy Tests

5.1 Equipment Required

1. Single Patient Use Adult Airway Adapter, PN: 6063-01, Qty 3

2. NiMH rechargeable battery pack (fully charged), PN: 400043 or equivalent.

3. External power supply, PN: 9220-10 and hospital grade line cord PN: 600026

4. Model 1298 Gas Regulator, PN: 6081-00

5. Precision gas mixture, PN: 8364-10

6. Nova Princo Barometer or equivalent

7. Thermometer (measure ambient room temperature)

5.2 Procedure

1. Visually inspect the monitor and verify that there are no cosmetic defects.

2. Install a fully charged MiMH rechargeable battery pack (PN: 400043) into the unit under test.

3. Plug the external power supply (PN: 9220-10) into an AC outlet, then plug the other end into the unit’s DC input.

4. Hold the and keys down, press the POWER key to turn the monitor on and reset to factory defaults.

5. The monitor will display "Resseting Monitor to Factory Defaults", then “Novametrix Medical Systems Inc. Model 615 Checking System” then the adapter mode and the current setting for the alert limits (enabled or disabled). The keypanel LEDs will illuminate in sequence during the power up sequence.

Rev. 00 Model 615 Service Manua

Page 34

Section 5

6. Calculate the nominal CO2 readings using the following equation: (Pbaro)

(CO

1-0.003

(33-T)

Where: Pbaro=barometric pressure in mmHg T=temperature in degrees centigrade N=the nominal corrected CO CO

%=percentage of CO2 test gas used, e.g. 5% CO2 test gas = .05

value for the given CO2%

Example:

If T=23 and Pbaro=760 then N=((CO N=CO N=39.2 (for CO

%) · 760) / 1-0.003 · 10)

% · 783.505

%=.05 or 5% test gas)

For N<40; Low=N-2, High=N+2 For 40<N<70; Low=0.95 For N>70; Low=0.92

%=5 N=39.2 Low=37.2 High=41.2

N, High=1.05 · N

N, High=1.08 · N

Accuracy Tests

7. Connect a Single Patient Use Adult Airway Adapter (PN: 6063-01) to the

CAPNOSTAT

CO2 sensor.

8. Press and hold the key until ">0< ?" appears on the screen. Ensure that the

sensor and adapter are clear of any source of CO

, including your breath. Press the

ZERO key. Verify the adapter zeros then returns to the normal operating screen.

NOTE: The CAPNOSTAT® CO

sensor mush reach operating temperature before

zeroing. If the thermometer icon appears then the sensor has not reached proper temperature, wait one minute then attempt to zero again.

9. Connect the Model 1298 Gas Calibrator with 5% CO

gas and airway adapter stack

to the airway adapter (see instructions with the calibrator).

10. Enter the Configuration menus on the unit by pressing both the ADAPTER key and key simultaneously.

11. Press the key until CAPNOSTAT SERIAL # and VERIFY ACCURACY appears.

12. Press the VERIFY ACCURACY key. Check that the value is 0.4 +0.5/-0.4 (no gas flowing through adapters).

13. Flow gas through the adapter for thirty seconds, record the reading. Verify the reading is between the Low and High limits for the CO

% of 5 (5% CO2 gas) a

calculated in step 6.

14. Shut the gas flow off. Remove the Model 1298 Gas Calibrator from the airway adapter.

15. Press the EXIT key.

16. Enter the Configuration menus on the unit by pressing both the ADAPTER key and key simultaneously.

Model 615 Service Manual Rev. 00

Page 35

Accuracy Tests

Section 5

17. Press the key until CAPNOSTAT SERIAL # and VERIFY ACCURACY appears.

18. Press and hold the key for three seconds. Verify the following displayed parameters:

From Model 615 display units (not displayed)

SRCI 180-300 mA

CTMP 45.00 ± 0.1 °C

DTMP 45.00 ± 0.1 °C

DCHN 3400 ± 200 A/D counts

RCHN 3400 ± 200 A/D counts

19. Pressing the EXIT key.

20. Remove the external power supply from the unit and verify that unit continues to function properly without interruption and that the Battery LED is illuminated (green).

21. Power the unit down by pressing the key.

22. Remove the rechargeable battery pack from the unit.

23. The Accuracy Tests are complete.

Rev. 00 Model 615 Service Manua

Page 36

Section 5

Accuracy Tests

[This page intentionally blank.]

Model 615 Service Manual Rev. 00

Page 37

Section 6

The Electronic Tests verify the calibration and operation of the electronic circuits within the Model 615. These tests DO NOT need to be performed on a regular (preventative) basis. Perform these tests only if the monitor fails to operate as expected or fails the Accuracy Tests or the Functional Tests. The Electronic Tests should be performed only by qualified personnel. The Electronic Tests require access to the internal components of the monitor. Refer to page 44 for disassembly.

The Model 615 contains static sensitive devices. Be sure to follow proper grounding procedures when handling the internal components to avoid damage from static discharge.

CAUTION

Electronic Tests

6.1 Equipment Required

1. External power supply, PN: 9220-10 and hospital grade line cord PN: 600026

2. Single Patient Use Sampling Adapter PN: 8954-01

3. Sample line tubing and cannula (to be modified) PN: 8957-01

4. Dehumidification tubing PN: 8908-01

5. Mass Flow Meter, Aalborg GFM17* or equivalent 1/8" Y - fitting 1/8" ID PVC tubing (1 1/2" length) 3/32" ID PVC tubing (2 - 1" lengths)

6. Nova Princo Barometer* or equivalent

7. D.M.M., Fluke Model 8840A* or equivalent

8. Oscilloscope, Tektronix Model 2236* or equivalent

9. Leakage Tester*

* Calibrated

6.2 Test Procedure

1. Remove the battery (trends, date and time will be lost).

2. Disassemble unit to expose circuit boards.

3. Situate the boards so that no shorting can occur. Connect the external DC power

supply.

Rev. 00 Model 615 Service Manua

Page 38

Section 6

Electronic Tests

4. Press the POWER key to power up the main board. Verify the proper power up sequence is on the LCD display.

5. Measure the following voltages. Use TP 37 as ground reference.

Signal Name Location Side Voltage Tolera nce

VDD TP 43 Front 5.00 V ± 100 mV

+ VA TP 31 Front + 13.75 V ± 500 mV

- VA TP 40 Front - 13.75 V ± 500 mV

+ CVA IC 35 pin 2 Front + 12.00 V ± 500 mV

- CVA IC 40 pin 3 Front - 12.00 V ± 500 mV

+ VSRC IC 38 pin 2 Front + 12.00 V ± 500 mV

- VSRC IC 39 pin 3 Front - 12.00 V ± 500 mV

VBATTADC IC 37 pin 3 Front + 1.80 V ± 100 mV

VHTR C148 Positive Front + 8.00 V ± 1.00 V

CVREF TP 24 Back + 2.50 V ± 25 mV

2CVREF TP 23 Back + 5.00 V ± 50 mV

- 2CVREF TP 26 Back - 5.00 V ± 50 mV

VBACKUP IC 8 pin 8 Front + 4.60 V ± 150 mV

LEDSRC TP 45 Back + 11.50 V ± 1.00 V

6. Monitor pin 4 of IC36 (or pin 5 of IC41) and insure that a 655 kHz sync frequency is present. Check that pulse amplitude is switching between 0 and 5VDC.

7. Monitor IC13-2 with an Oscilloscope. Verify a positive pulse 405

8. Monitor IC14-2 with an Oscilloscope. Verify a positive pulse 393

10 us wide.

9. Monitor Q5 pins 5-8 with an oscilloscope. Verify the following waveform:

+12V

-12V

828 us ± 40 us

Model 615 Service Manual Rev. 00

Page 39

Electronic Tests

Section 6

10. Monitor Q6 pins 5-8 with an oscilloscope. Verify the following waveform:

+12V

-12V

828 us ± 40 us

11. Enter the Configuration menus on the unit by pressing and holding the ADAPT E key immediately followed by the key.

12. Press the key until CAPNOSTAT SERIAL # appears and VERIFY ACCURACY.

13. Press and hold the key.

14. Using a calibrated barometer, read the barometric pressure.

15. Adjust VR1 (on the 2754 bd.) until the PB equals the actual barometric pressure

16. Cut the nasal cannula as shown below. Bond the 3/32" PVC tubing to each cut end, then connect to the Y fitting. Connect the 1/8" PVC tubing to the to the output of the Y fitting.

Cut here, then connect to flow meter via "T" connector

6 ft tubing

Bond the PVC tubing to the cannula using a 50/50 mix of THF and Cyclohexanone. Dip the cut cannula ends into the mix for one second, wipe off excess then connect to the PVC tubing, allow to set for a period of five minutes. Verify there are no occlusions.

Rev. 00 Model 615 Service Manua

Page 40

Section 6

Electronic Tests

17. Connect the cannula and dehumidification tubing to a sampling adapter as shown below.

Flow Meter

Tubing supplied with cannula

18. Attach the dehumidification tubing to the monitor (the CAPNOSTAT CO

Y-fitting

Cannula

Sampling adapter

Dehumidification tubing

sensor

should be connected to the adapter).

19. Measure the voltage at J402 pin 1. Verify 0.00V ± 50mV.

20. Press the Adapter key. Verify a Set Adapter Type menu is displayed.

21. Press the Select key until Sampling is selected.

22. Install a Single Patient Use Sampling Adapter and verify the sampling pump turns on and the Flow Meter shows a flow rate of 180 ± 25 (adjusted by VR2).

23. Measure the voltage at J402 pin 1. Verify 2.508V ± 75mV.

24. Press the Zero key to start a Zero calibration. Verify an Adapter Zero in Progress message is displayed with a timer counting down from 20. Verify the calibration completes with no error messages present.

25. Remove the Sampling Adapter and verify the pump turns off.

26. Press the Adapter key. Verify the Set Adapter Type menu is displayed.

27. Press the Select key until Adult is selected. Press the Exit key. Verify the sampling pump turns off and the main screen is displayed.

28. The test is complete.

6.3 Safety Testing

1. Using a leakage tester, and with the external DC power supply connected, measure the leakage current:

•Normal

• Normal reverse ground

• Normal ungrounded

Verify a leakage current <300 uA for 120VAC or <500 uA for 220VAC.

Model 615 Service Manual Rev. 00

Page 41

Section 7

Status messages indicate conditions that should be corrected or monitored; they may or may not be tied to an alert condition. These conditions can be a result of a hardware or sensor fault condition. Status messages are displayed on the screen in the same manner as alert messages. Following is a list of status and alert messages that may appear on the monitor.

7.1 System Messages

Message Description

PRESSURE FAULTY The barometric pressure sensor is returning a value which is out of

EtCO2 AUTO LIMITS

SET

RESETTING TO

FAC TORY

DEFAULTS

TRENDS ERASED The trends stored in the monitor’s memory have been erased.

CHECK TIME/DATE Time and date may not be properly set. The time and date can be

UNKNOWN ERROR Remove the monitor from use and contact Novametrix service per-

Status Messages

range (<400 mmHg or > 800 mmHg). The monitor will default to 760 mmHg for calculation purposes. Refer servicing to qualified personnel.

This message is displayed when the monitor has successfully determined and set the auto alert limits for ETCO

All setup and alert settings have just been reset to factory default values.

adjusted in the CONFIGURATION menu by pressing the Backlight key.

sonnel.

7.2 Capnography Messages

Message Description

CAPNO

WARMING

Rev. 00 Model 615 Service Manua

Sensor is under temperature. Wait for the CAPNOSTAT sensor to reach operating temperature.

Page 42

Section 7

Status Messages

Message Description

CHECK

ADAPTER

Excessive moisture or secretions detected in the adapter: Change adapter. Adapter type has been changed (e.g. adult to neonatal): Zero the adapter.

No adapter detected: Place an adapter on the CAPNOSTAT CO

sensor.

RESP=0

m : ss

A breath has not been detected for the indicated time (XX seconds). This message appears when the time since the end of expiration of the last detected breath exceeds the NO RESP TIMER setting in the configuration menu.

INSP

ZRO: HOLD

ADPT KEY

An inspired CO

level of 3 mmHg (or 0.4% or kPa) was

detected for 20 consecutive seconds.

The current through the CAPNOSTAT emitter has changed or the system is detecting EtCO less than -3.0 mmHg.

CAPNO FAULTY The following errors may be present:

1. The current through the source is too high or low.

2. The checksum for the CAPNOSTAT wrong.

3. The revision of the calibration data in the CAPNOSTAT not compatible with the software in the TIDAL WAVE Sp Moni- tor. Refer servicing to qualified personnel.

CAPNO

HI TEMP

CAN NOT

ZERO CO2

The temperature of the case or detector heater is over 50°C. Refer servicing to qualified personnel.

An error was detected which did not allow the system to zero the current adapter being used. Refer servicing to qualified personnel.

OUT

OF RANGE

The detected waveform value is beyond the measurement range of the monitor (0-100 mmHg, 0-13.2% or kPa).

A changing level of CO2 was detected during an adapter zero procedure. Wait 30 seconds and retry.

CO2 sensor source

values

calibration data is

The CAPNOSTAT

CO2 sensor has not reached operating

temperature while attempting to zero. Wait for the sensor to reach operating temperature.

ADAPTER ZERO

IN PROGRESS,

An airway adapter zero is in progress. XX indicates the number of seconds remaining.

TIME REMAINING 0 : XX

WARNING:

CHANGING CO2 UNITS

Changing CO

units (mmHg, %, kPa) in the Configuration

menu will cause this message to appear.

ERASES STORE

TRENDS

Model 615 Service Manual Rev. 00

Page 43

Section 8

8.1 General

This section presents recommended maintenance schedules for the Model 615 and information on general maintenance, such as battery and fuse replacement, disassembly and assembly instructions, and system software updates.

8.2 Maintenance Schedules

When the monitor powers up, a self-test is performed which checks the internal electronics of the monitor. If this self-test fails, remove the monitor from use and contact qualified service personnel.

The monitor should undergo routine inspection and safety checks on a quarterly basis or according to hospital protocol.

The electronic circuits within the Model 615 handheld capnograph do not require scheduled calibration or service. However, in order to maximize battery life, the monitor’s internal battery should be tested monthly. Novametrix recommends the following maintenance schedules.

• Cleaning and Sterilization: Perform as required. See "Cleaning and Sterilization" on page 38.

• Battery and AC Operation: Contains information on rechargeable batteries. See "Battery Maintenance" on page 39.

• Functional Tests: The test verifies overall functional integrity of the monitor and sensor. See "Functional Tests" on page 23.

• Accuracy Tests: The test verifies the calibration accuracy of the monitor using specified test apparatus. See "Accuracy Tests" on page 27.

• Electronic Tests: These tests contain information on testing the electronic circuits within the Model 615 and should only be performed if the monitor fails to pass the Functional Tests. Only qualified service personnel should attempt to perform the Electronic Tests. See "Electronic Tests" on page 31.

Maintenance

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

Rev. 00 Model 615 Service Manua

Page 44

Section 8

Maintenance

8.3 Cleaning and Sterilization

Follow the cleaning and sterilization instructions listed below to clean and/or sterilize the monitor and its accessories.

Monitor, BaseStation and External Power Supply

• Turn the monitor off, and unplug the BaseStation and the external power supply from the AC power source before cleaning.

• The monitor, BaseStation and external power supply can be cleaned and disinfected with solutions such as a 70% isopropyl alcohol, 2% glutheralhyde, or 10% bleach solution. Wipe down with a water-dampened clean cloth to rinse. Dry before use.

• Do not immerse the monitor, BaseStation or external power supply.

• Do not attempt to sterilize the monitor, BaseStation or external power supply.

CAPNOSTAT

• Clean the sensor surface with a damp cloth.

• Make certain that the sensor windows are clean and dry.

• Do not immerse the CAPNOSTAT

• Do not attempt to sterilize the CAPNOSTAT

CO2 Sensor

CO2 sensor.

Single Patient Use Airway Adapters

• Treat all single patient use airway adapters in accordance with hospital protocol for singlepatient use items.

External Sampling System Components

• The Nasal Sampling Cannulas and adapters are for single-patient use.

Internal Sampling System Components

Acceptable fluids for cleaning and sterilizing the internal pneumatic parts of the Sampling System include isopropyl alcohol, Cidex sodium hypochlorite (bleach).

or equivalent, or a 5.25% water solution by weight of

CAUTION

Do not attempt to pump cleaning/sterilizing liquid with the sampling pump. This may cause accelerated wear on the pump bearings. Always flush liquids with a syringe as described in the following instructions.

To clean and disinfect the pumping system:

1. Turn the monitor off and disconnect the external power supply (if connected).

2. Remove both the sampling inlet tubing set and the sampling exhaust tubing (if any).

2. Cidex is a trademark of Arbook, Inc.

Model 615 Service Manual Rev. 00

Page 45

Maintenance

Section 8

3. Attach an exhaust port line (1/8 inch or 3/16 inch I.D. tubing) from the Sampling Exhaust port to a suitable container located below the bottom level of the monitor.

4. Use a 60 cc catheter tip syringe. Fit it to the Sampling Inlet connector. Flush the sterilizing solution slowly through the pumping system. Push the entire 60 cc of solution through the Sampling Inlet . Repeat this process two more times to use a total of 180 cc of solution.

5. Remove the syringe and leave the cleaning/sterilizing fluid within the sampling pump system for 30 minutes to disinfect the system. Follow sterilant manufacturer’s instructions for disinfection.

6. After 30 minutes, fill the syringe with distilled water and flush the system three times. Allow the cleaning/disinfection solution and distilled water to drain through the Sampling Exhaust output.

7. Push several syringes of air slowly through the system to ensure that most of the liquid has been drained.

8. Follow this with at least three more syringes of distilled water, followed by at least two more syringes of air to make sure that most of the distilled water has been drained.

9. Remove the syringe from the unit. Do not connect the sampling inlet tubing. Connect the external power supply and turn the monitor on. Allow the sampling pump to operate for several minutes. This will help to remove any trapped water.

10. Connect a sampling tubing set to the Sampling Inlet .

11. Block the open end of the tubing with your finger. Alternate blocking and unblocking the tubing end at least ten times. Use a quick, brisk motion when blocking and unblocking the tubing. Keep the tubing blocked and unblocked for several seconds at a time.

12. Repeat the same blocking and unblocking action with your finger on the sampling exhaust port.

13. Allow the sampling system to run for at least 30 minutes without the sampling assembly tubing and the sampling exhaust tubing connected. This will speed dry the system pneumatics.

14. Once these cleaning and disinfection instructions have been completed, normal sampling system operation can be resumed.

8.4 Battery Maintenance

New batteries, or batteries stored for extended periods of time (3 months or more) may need to be fully charged and discharged up to five (5) times before performing at full capacity. New batteries or batteries that have not been used for 30 days, should be charged for 24 hours prior to use.

AC/Battery Operation

The monitor can operate for up to 4 hours while powered from a fully charged internal battery. The battery is charging when the monitor is powered through its DC input and the keypanel icon is green. The battery will charge even if the monitor is off. Power to the DC input is supplied

Rev. 00 Model 615 Service Manua

Page 46

Section 8

Maintenance

by the external power supply (Cat. No. 9220-10) with or without the optional BaseStation (Cat. No. 6998-00).

Rechargeable and disposable battery capacity is shown in the table titled, " Battery Life and Recharge Times" on page 44. Times may be reduced in colder temperatures or with the sampling adapter; operation with the backlight off may slightly increase these times.

Battery Status and Alerts

When the monitor is operating on battery power, and the battery is sufficiently charged, the battery icon LED on the keypanel will be green. The battery level is reflected on the battery icon by different colors (for example, battery fully charged: green, battery low: flashing yellow).

The LED on the keypanel flashes red when the monitor is powered by its internal battery and approximately 5 minutes remain. The monitor will sound an audible alert, then when the battery is depleted, turn itself off. This alert can only be silenced by connecting the external supply or turning the monitor off. The NiMH battery pack should be replaced, or th Model 615 (Cat. No. 6998-00) or external power supply (Cat. No. 9220-10) should be connected to recharge the battery (rechargeable batteries only) and power the monitor. See "Battery Life and Recharge Times" on page 44.

BaseStation

NOTE

When the battery is low (red blinking battery LED on keypanel) the monitor has shut down CO

functions. Connect to AC power as soon as possible.

NOTE

The battery life indicator may not reflect the true battery status upon power-up for approximately 30 seconds.

The battery life indicator is inactive when the monitor is powered by the BaseStation or the external power supply.

Model 615 Service Manual Rev. 00

Page 47

Maintenance

Power jack

Hinged side

Battery cover

Finger grip

Interface connector WARNING: Do NOT connect to any device not

approved by Novametrix

External power supplyConnect line cord

DC input

(Cat. No. 600075) (Cat. No. 9220-10)

Section 8

Removing and Installing the Battery

Grasp the finger grips on each end of the battery cover. Squeeze together and pull so that the cover opens to reveal the internal battery (the cover is hinged on the bottom of the case). Remove the battery from the monitor.

The battery is keyed so that it can be installed in only one way (see illustration inside battery compartment). The contacts should go in first and be located toward the top left of the monitor when inserting. Make certain the battery cover is properly closed before operating the monitor.

Charge using External Power Supply

Plug the external power supply directly into the DC power jack on the side of the monitor, and connect a hospital-grade line cord to an AC source. The AC icon will illuminate green and the battery will charge in approximately 5.5 hours. If the monitor has been stored with the battery installed for thirty (30) days or more, charge the battery for 24 hours prior to use.

Use only Novametrix supplied devices when connecting to the power input jacks on the Model 615 or on the BaseStation.

Rev. 00 Model 615 Service Manua

Do not attempt to use the adapter for the external battery charger for this function.

CAUTION

Page 48

Section 8

Maintenance

NOTE

When powered by the external power supply, the Model 615 will not overcharge a rechargeable battery.

The external power supply has a universal power input. The IEC 320 input receptacle for line cord connection allows compatibility with every country’s voltage and frequency requirements.

Charge using optional BaseStation

Power for the BaseStation is supplied by an external power supply (Cat. No. 9220-10) or the internal battery. When the power supply is properly connected to the BaseStation and a monitor is placed within the station the green, “In Use” LED will illuminate. The icon on the monitor will also illuminate indicating that external power is connected.

Connect the external power supply jack to the monitor and connect a hospital-grade line cord from the external power supply to an AC source.

The 9220-10 Power Supply is approved by the following regulatory agencies:

:Canadian Standards Assoc.

:SEMKO (Sweden)

:VDE (Germany)

DVE

:FINKO (Finland)

:DEMKO (Denmark)

Monitor in BaseStation

(BaseStation Cat. No. 6998-00)

DC input

Connect line cord

IEC 320 receptacle

(Cat. No. 600075)

External power supply

(Cat. No. 9220-10)

Green “In Use” LED illuminates indicating

a monitor is in place and the power supply is active

Illuminates indicating

external power

CAUTION

Although other connectors may physically fit, do not attempt to connect any device other than power supplies approved by Novametrix for use with this device. Doing so may damage the Model 615 and will void the warranty.

Never sterilize or immerse the monitor, sensor or accessories in liquids.

Charging with External Charger

In a non-patient area, connect the adapter to an AC source, then plug the adapter jack into the charger. Remove the battery from the Model 615 and insert it into the external charger. The battery will be fully charged in approximately 4.5 hours. The external charger is for use with the

Model 615 Service Manual Rev. 00

Page 49

Maintenance

NiMH Rechargeable Battery (Cat. No. 400043)

Battery is keyed to fit into slot in only one direction

Connect adapter

Connect line cord

Section 8

NiMH rechargeable battery pack (Cat. No. 400043) only. Refer to the instructions supplied with the charger for additional information.

WARNING

The external battery charger should NOT be used to recharge the battery near or in close proximity to patients and/or other medical equipment in operation. It is intended for use in service areas only (i.e. nurses station, biomed lab, etc.).

With a new battery, or a battery that has not been used for 30 days or more, charge the battery for 24 hours prior to use.

When powered by the external power supply or the BaseStation, the Model 615 will not overcharge a rechargeable battery.

The monitor may not operate on battery power if the battery is not sufficiently charged.

Dispose of batteries in accordance with local laws.

AA Lithium Batteries

To power Model 615 from AA lithium batteries, insert seven disposable batteries (Energizer L91 or equivalent) into the optional Battery Case (Cat. No. 6862-00) following the polarity markings on the Battery Case.

Batteries can explode, leak or catch on fire if heated or exposed to fire or high temperatures.

Do not mix battery types (e.g. disposable and rechargeable AA batteries).

NOTE

WARNING

Rev. 00 Model 615 Service Manua

Page 50

Section 8

Maintenance

Battery Life and Recharge Times

Battery life:

Configuration

only (sampling off)

with sampling

Power source - Approximate Monitoring Times

Rechargeable NiMH AA lithium batteries

4.5 hours 4.0 hours

4.0 hours 3.5 hours

Recharge times:

Recharge method Recharge times

External charger w/adapter 4.5 hours

External power supply or External power supply/BaseStation (in monitor using wall adapter charger)

5.5 hours - following recent use of more than approximately 4 hours. With a new battery, or a battery that has not been in use for 30 days or more, charge the battery for 24 hours prior to use.

8.5 Assembly Exchanges

The disassembly instructions below are intended as a guide to enable component exchanges if necessary. There are no user serviceable parts inside. Disassembly should be performed by qualified service personnel only.

CAUTION

The Model 615 contains static sensitive devices. Be sure to follow proper grounding procedures when handling the internal components to avoid damage from static discharge.

Disassembling the Monitor

1. Ensure that the monitor is OFF. Disconnect the A/C adapter, remove the battery pack.

Model 615 Service Manual Rev. 00

Page 51

Maintenance

cover screws

main board

ribbon cable

side view

Section 8

2. Turn the monitor upside down and remove the four cover screws from the bottom cover.

3. Carefully lift the rear cover from the monitor. The separate assemblies of the monitor can now be removed.

4. Lift the Main Board and disconnect ribbon cable from the Sensor Assembly Board by grasping the connector (not the cable) and gently rocking from side to side to loosen. Be careful not to bend any pins when pulling the connector off of the header strips.

Unplug the pump connector from the main board.

5. Remove the Main Board.

6. The Sensor Assembly Board, Display Board, and battery connector can now be accessed.

Rev. 00 Model 615 Service Manua

Page 52

Section 8

Maintenance

7. To disconnect ribbon cable J3, grasp the edge of the ZIF (zero insertion force) connector with one forefinger on either side. Pull gentl mechanism. Slide the ribbon cable out.

sideways

to release the

ZIF connector

8. Remove four screws from the Sensor Assembly Board, then the screw near the battery connector.

sensor assembly board screws

battery connector screw

9. Remove the sensor assembly board by gently prying upward, rocking gently to release the header strip J1 which connects through the Sensor Assembly Board from the Display Board below.

Model 615 Service Manual Rev. 00

Page 53

Maintenance

screws

ribbon cable

display board

Section 8

10. Remove 4 screws holding the Display Board in place. Do not bend the tabs on the board, the LCD display can not be removed from the board. Be sure not to lose the plastic bezel located in between the LCD display and the display window.

Reassembling the monitor

1. Check the inside of the display window and the LCD display for dirt/finger prints, clean if necessary. Replace the plastic bezel around the display window. Set the Display Board in place and secure with 4 screws.

2. Slide the ribbon cable through the sensor assembly board, align the Sensor Assembly board’s J2 connector to the header strip on the display board. Check that the battery connector is aligned to the cover’s receptacle. Just before pressing the Sensor Assembly Board into place, use a small screwdriver to set the ground strap from the keypanel into place.

3. Secure the Sensor Assembly Board with 4 screws. Then secure the ground strap with a screw

4. Slide ribbon cable J3 into the ZIF locking connector, pushing gently to be sure that the cable is as far into the locking mechanism as possible. Push the connector closed to lock in the ribbon cable. Pull lightly on the ribbon cable to ensure that it is secure.

5. Replace the three connections from the Main Board to the Sensor Assembly Board and align the main board with the standoffs.

6. Ensure the battery gasket is set in place, refer to the assembly print 6800-01 (page

3) for placement. Place the back cover on the monitor. Secure with 4 screws.

7. Opened hinged cover and replace the rechargeable battery or battery pack. Battery is keyed to fit in only one direction. When the monitor is powered it will default to the factory default settings.

8.6 Serial Communications/Power Interface Connector

Rev. 00 Model 615 Service Manua

Located on the enclosure rear is a six pin modular contact which provides an RS232 interface as well as a power input for unit operation and battery charging when connected to Novametrix accessories. This connector meets the patient safety requirements of the following agencies: IEC 601-1, UL544, and TUV.

Page 54

Section 8

Maintenance

8.7 Software Update Instructions

The following procedure is for updating the monitor’s software from a supplied Model 615 Software Update Kit using an IBM-compatible computer and the Base Station (Cat. No. 6998-

00). Refer to any instructions that may accompany the software update diskettes for changes in the procedure or other pertinent information.

Equipment Required

1. IBM compatible computer with an unused serial port (COM1 or COM2)

2. Base Station (Cat. No. 6998-00)

3. Serial Communication Cable (PN: 211923)

4. Update diskette PN: 9475-07-XX (XX = new firmware version)

5. Reply card

Setup

Connect the serial cable to the Base Station. Connect the other end of the cable to the computer’s COM When connecting the cable be sure to record which COM port is used, the program will prompt the user for this information before updating the software.

(serial) port. The update software allows use of either COM1 or COM2.

Procedure

Turn the Model 615 off, then place it into the base station. Remove the AC adapter/charger connector from the base station if installed. NOTE: All power to the Model 615 must be removed otherwise the update will not operate properly.

Insert the update diskette into the computer’s floppy drive (typically drive A).

From DOS:

the “A:” prompt type

From Windows 3.x:

From Windows 9X/2000/NT:

letter where the update diskette is loaded)

Follow the install program screen instructions. Verify that the firmware version shown on the computer screen is correct, then press any key to continue.

Type A: (where A is the drive letter where the update diskette is loaded). At

UPDATE

Boot to DOS and follow the DOS instruction above.

then press .

Select Start, Run, then type A:update (where A is the drive

3. The location and availability of the COM ports (COM1, COM2) will vary from computer to computer. Refer to the computer’s documentation for more information. The update software can only communicate with the Model 615 through either COM1 or COM2.

Model 615 Service Manual Rev. 00

Page 55

Maintenance

Section 8

When the following prompt appears:

Select the PC’s COM port the instrument is connected to from the following choices:

1-COM1 2-COM2 any other key - exit

Press the 1 key if the serial communications cable is connected to COM 1. Press the 2 key if the serial communications cable is connected to COM2. If you are not sure of the process, press any other key and call service or Novametrix Service Department at 1-800-243-3444, in Connecticut call collect (203) 265-7701.

Turn the Model 615 on (connect the AC adapter/charger to the base station if the battery is not fully charged). It is important that the Model 615 is powered off when the update program is started, and is turned on after the program starts to access the monitor.

When the download starts the Model 615 screen will blank and the following message wil appear on the computer screen.

Validating File

then,

UPDATING FIRMWARE, DO NOT INTERRUPT. PERCENT DONE: xx%

The “xx” will count up from 0% through 100% as the update is completed.

The procedure is complete when the computer displays:

***PROGRAM COMPLETE***

Esc-backF1-exit

Press F1 to exit the update program.

Check that the Model 615 restarts and returns to normal operation, if not then perform the update procedure again or call Novametrix Service Department at 1-800-243-3444, in Connecticut call collect (203) 265-7701.

Record the serial number from the Model 615 on the reply card (supplied with software update disk). Fill in the remaining information and return the postage paid card to Novametrix.

Rev. 00 Model 615 Service Manua

Page 56

Section 8

Maintenance

[This page intentionally blank.]

Model 615 Service Manual Rev. 00

Page 57

Warranty

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

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

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

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

Service Department

For factory repair service, call toll free

1-800-243-3444

In Connecticut, call Collect (203) 265-7701

Facsimile (203) 284-0753

World Wide Web: http://www.novametrix.com

Internet: techline@novametrix.com

Caution:

of a licensed medical practitioner.

Rev. 00 Model 615 Service Manua

Federal (U.S.A.) law restricts this device to sale, distribution, or use by or on the order

Page 58

Service Policy

Novametrix Medical Systems Inc. provides 24-hour a day access to technical support through its Technical Support Department in Wallingford, Connecticut, and company Service Representatives located throughout the United States. (Outside the U.S., primary technica support is handled through our qualified international sales and service distributors.)

Novametrix will provide Warranty Service support within 48 hours of receiving a request for assistance. Contact the Technical Support Department by telephone toll free at 800-243-3444, or 203-265-7701; by facsimile at 203-284-0753; or, by e-mail at techline@novametrix.com. After hours telephone support requests (before 8:00 AM and after 5:00 PM Eastern Time) will be responded to promptly by the Technical Support on-call staff. After hours facsimile and email requests will be answered the next business day. It is suggested that any person calling in for technical support have the equipment available for product identification and preliminary troubleshooting.

Novametrix reserves the right to repair or replace any product found to be defective during the warranty period. Repair may be provided in the form of replacement exchange parts or accessories, on-site technical repair assistance or complete system exchanges. Repairs provided due to product abuse or misuse will be considered “non-warranty” and invoiced at the prevailing service rate. Replaced or exchanged materials are expected to be returned to Novametrix within 10 days in order to avoid (additional) charges. Return materials should be cleaned as necessary and sent directly to Novametrix using the return paperwork and shipping label(s) provided (Transferring return materials to a local sales or dealer representatives does not absolve you of your return responsibility.).

Novametrix manufactures equipment that is generally field serviceable. When repair parts are provided, the recipient can call Technical Support for parts replacement assistance and repair assurance. In the event a replacement part requires increased technical capability, Technical Support may request Biomedical assistance, provide on-site technical support or complete replacement equipment. If the customer requires the return of their original product, the exchange material will be considered “loaner material” and exchanged again after the customer equipment is repaired.

Novametrix promotes customer participation in warranty repairs, should they become necessary. A longer useful product life, and quicker, more cost-effective maintenance and repair cycles—both during and after the warranty period, are benefits of a smooth transition into self-maintenance. The Technical Support Department can provide technical product support at a level appropriate to your protocol and budget requirements.

Please contact Technical Support for information on these additional programs and services:

• Focus Series Technical Training Seminars

• Test Equipment and Test Kits

• Service Contract / Parts Insurance Plans

• On-Site Technical Support

• “Demand Services” including: Flat rate parts exchange Flat rate return for repair Time and material, Full warranty, discounted replacement sensors.

Model 615 Service Manual Rev. 00

Page 59

Specifications

Section 9

9.1 Specifications

General

Specifications for the Novametrix Model 615, are listed for informational purposes only, and are subject to change without notice.

Capnograph

• Principle of Operation: Non-Dispersive Infrared (NDIR) absorption, dual wavelength ratiometric-single beam optics

• Sensor Type: “Mainstream” (no gas sample drawn from breathing circuit)

• Initialization Time: Capnogram in 15 seconds, full specifications in 60 seconds.

• Response Time: 60 ms

• Gas Compensation - Room Air, O screen.

• Barometric Pressure Compensation: Automatic (range 400-800 mmHg)

• CAPNOSTAT Weight: Less than 18 g without cable Sensor Size: 1.30" x 1.67" x .85" (3.30 x 4.24 x 2.16 cm), 6 foot cable (2.44 m) Construction: Durable high performance plastic, ultra-flexible cable Shock Resistant: Sensor will withstand a 6 foot drop to a tile floor

• Airway Adapter: Single Patient Use, less than 5 cc deadspace, meets ANSI Z-79

> 60%, N20 > 60%: Operator selectable in configuration

CO2 Sensor and Airway Adapter:

Specifications

EtCO2 Section (Mainstream)

• Range 0-150 mmHg, CO2 partial pressure

• Accuracy reading.

• Warm-up Time: Operational in 15 seconds, 1 minute to full specifications

• Step Response Time: 60 ms, adult; less than 50 ms, neonate

• Averaging Time: 1 breath, 10 seconds (default), 20 seconds, instantaneous

• Display Resolution: 0-25, 0-50, and 0-150 mmHg in 31 pixels

• Alerts: The Model 615 has user selectable alert limits for EtCO

: 0-40 mmHg ±2 mmHg, 41-70 mmHg 5% of reading, 70-150 mmHg ±8% of

Respiratory Rate (Mainstream)

• Range 0-150 breaths/min.

• Accuracy: ±1

• Alerts: The Model 615 will have user selectable alert limits for Respiratory Rate.

• Averaging Time: 8 seconds

1. Allows for halogenated anesthetic agents which may be present at normal clinical levels. The presence of desfluane in the exhaled breath beyond normal levels (5-6%) may positively bias Carbon Dioxide values by up to an additional 2-3 mmHg.

breaths/min.

Rev. 00 Model 615 Service Manua

Page 60

Section 9

EtCO2 Section (Sidestream)

• Range 0-150 mmHg, CO2 partial pressure

• Accuracy: 0-40 mmHg ±2 mmHg, 41-70 mmHg 5% of reading, 70-150 mmHg ±8% of reading.

• Warm-up Time: Operational in 15 seconds, 1 minute to full specifications

• Step Response Time: less than 200 ms; Sampling Rate - 180 cc/min.

• Averaging Time: 1 breath, 10 seconds (default), 20 seconds, instantaneous

• Display Resolution: 0-25, 0-50, and 0-150 mmHg in 31 pixels

• Alerts: The Model 615 will have user selectable alert limits for EtCO

Respiratory Rate (Sidestream)

• Range 0-70 breaths/min

• Accuracy: ±1

• Alerts: The Model 615 will have user selectable alert limits for Respiratory Rate.

• Averaging Time: 8 seconds

breaths/min.

9.2 Monitor Specifications

Specifications

• Classification (IEC601-1): Class II/internal power source, type BF, enclosure protection rating of IPX1 (non-condensing)

• Transport/Storage: short term: 14° to 122° F (-10° to 50° C) with NiMH battery long term: 14° to 95° F (-10° to 35° C) with NiMH battery storage: 14° to 131° F (-10° to 55° C) without NiMH battery

• Size: 7.9” x 3.25” x 1.5”

• Weight: 24 ounces

• Power: 100-250 VAC, .38A, 50-60 Hz

• Battery: Rechargeable NiMH battery pack (Cat. No. 400043) or equivalent; AA lithium batteries - Energizer L91 or equivalent.

• Battery Life: Approximately 4.5 hours of continuous use with fully charged NiMH rechargeable battery pack. Approximately 4.0 hours with sample pump in operation.

• Display: LED backlit 2.5” x 1.25” LCD, adjustable contrast

• LED indicators for: Low battery, adapter type, audio/alert status (indicates audio off, 2 minute silence, active alert), and external power.

• Electromagnetic Emissions: Conforms to EMC Directive 89/336/EEC, CISPR Class A. Tested to EN55011 (1991) and CISPR11 (1990).

• Electromagnetic Immunity: Conforms to EMC Directive 89/336/EEC, EN50082-1 (1992). Tested to IEC801-3 (1984) Radiated Immunity. Conforms to Medical Device Directive 93/ 42/EEC and EN60601-1-2 (1993). Tested to IEC801-2 (1991) ESD, IEC801-4 (1988) EFT, and IEC1000-4-5 (1995) Surge Immunity.

. Operating Environment: 50 to 104° F (10 to 40° C), 0-90% relative humidity

2. External power supply excluded.

Model 615 Service Manual Rev. 00

Page 61

Specifications

Additional Features

• Alert Limits: Automatic or menu selected high and low limits for ETCO2 and Respiratory Rate. NO RESPIRATION alert selectable between 20, 40 and 60 seconds. Visible and audible alerts are immediate.

• 2-Minute Silence: When key is pressed, audible alerts are deactivated for two minutes. Indicated by yellow 2 minute LED and flashing bell icon

• Audio Off: Press and hold key for 3 seconds to deactivate audible alerts. Indicated by flashing yellow Audio Off LED and flashing bell icon.

• Trend Memory: 24 hour trend memory capacity, battery backed. On-screen 30 minute trends for ETCO downloaded to a PC.

• Digital Data Output: Serial (RS232), connect only to Novametrix approved devices.

• Sampling System: Standard. Allows gas sampling of non-intubated patients

• Internal Battery-backed Real Time Clock

and Respiration Rate. Other parameters are stored internally and can be

Section 9

Rev. 00 Model 615 Service Manua

Page 62

Section 9

Specifications

[This page intentionally blank.]

Model 615 Service Manual Rev. 00

Page 63

Accessories

Section 10

Catalog No. Description

9425-00

CO2 AIRWAY ADAP T E R S a n d A C C ESSORIES

6063-00

6063-25

6421-00

6421-25

6312-00

6312-25

SAMPLING ADAPTERS and ACCESSORIES

8954-00

8954-25

8955-00

8955-25

8956-00

8956-25

8957-00

8957-25

8958-00

8958-25

8908-00

POWER SUPPLY OPTIONS

6998-00

9220-10

6862-00

400050

400043

400049

Accessories

TIDAL WAVE

includes Single Patient Use Adult Airway Adapter (6063-01), Carrying Case (315127),

615)

and Single Patient Use Sampling Adapter with Adult Nasal CO

01).

For monitoring CO2 with the CAPNOSTAT® CO2 sensor.

Pediatric/Adult Single Patient Use Airway Adapters

Pediatric/Adult Single Patient Use Airway Adapters with mouthpiece

Neonatal/Pediatric Single Patient Use Airway Adapters

Single Patient Use Sampling Adapters

Single Patient Use Adapter w/ Nasal CO

(10 per box

Single Patient Use Adapter w/ Nasal CO

(25 per box

Single Patient Use Adapter w/ Nasal CO Pediatric

Nafion

BaseStation

External DC Power Supply

AA Lithium Battery Pack

AA Lithium Battery

NiMH Rechargeable Battery

Battery Charger

cord included

Handheld Mainstream Capnograph and Sidestream Sampling (Model

Sampling Cannula (8955

(10 per box

(25 per box

(10 per box)

(25 per box)

(10 per box)

(25 per box)

Sampling Cannula—Adult

Sampling Cannula—Pediatric

Sampling and O2 Delivery Cannula—Adult

Sampling and O2 Delivery Cannula—

(10/box)

(25/box)

Dehumidification Tubing

(External Power Supply and/or computer cable not included

(power cord not included

(requires 7 batteries)

(7 required)

, w/ AC Adapter, Universal Input Voltage, for type DR30 NiMH battery. Power

Sampling and O2 Delivery Cannula—

(10 per box)

(25 per box)

(10 per box)

(25 per box)

(10 per box)

(25 per box)

MISCELLANEOUS

140084

315127

6065-00

600026

Pole/shelf mount kit

Transport Pouch

NovaCARD for Window

Power Cord

(N. America only

, Data Archive Software (3½” diskette)

Rev. 00 Model 615 Service Manua

Page 64

Section 10

Catalog No. Description

600075

9086-00

9140-00

400052

300017

6081-00

8364-10

, BaseStation to Personal Computer (with 9-pin connector)

Cable

, BaseStation to Seiko DPU-414 Printer

Cable

Seiko DPU-414 Thermal Printer

AC Adapter for Seiko DPU-414 Printe

Thermal Printing Pape,

Gas regulator

Precision gas mixture

Accessories

w/Batter

, 120 VAC

Seiko DPU-414 (5 rolls per box

, for use with precision gas mixture, Cat. No. 8364-10

for validation

Model 615 Service Manual Rev. 00

Page 65

Parts Lists

Final Assembly 9425-00, Model 615

Seq Item Nbr Description Quantity

001 6874-32 LABEL, SN & BTRY 1

002 6886-13 CARTON, SHIPPING 1

004 9026-32 LABEL, "MANUFACTURED IN USA" 1

005 9425-01 MAIN ASSY, 615 1

007 9425-09 OVERALL WIRING DIAGRAM 0

008 9425-23 USERS MANUAL 0

013 9409-32 LABEL, QUICK GUIDE 1

014 9341-32 WARN LABEL, AC PWR SUPPLY 1

020 160044 ALCOHOL, ISOPROPYL 0

Main Assembly 9425-01, Model 615

Seq Item Nbr Description Quantity

001 2754-01 MAIN BOARD ASSY, 615 1

002 6680-26 BOTTOM CVR W PAD PRINTING 1

003 6685-16 BATTERY DOOR 1

004 6823-10 FILLER, KEYPANEL 1

005 6838-10 GASKET 1

006 6839-10 GASKET 1

007 9422-27 MEMBRANE KEYPANEL, 615 1

008 9426-13 TOP COVER W PAD PRINTING, 1

009 9203-10 INSULATING SHIELD 1

010 9208-01 XDUCER ASSY, CAPNO II 1

011 9215-01 END PANEL ASSY 1

012 9187-10 FOAM PAD, TOP 1

013 9201-10 FOAM PAD, BOTTOM 1

016 160044 ALCOHOL, ISOPROPYL 0

017 161102 ADHESIVE, RTV162, SILICON 0

018 281211 SCREW, 2-56 X 1/4L 0

019 286223 SCREW, 6-32 x 3/8 IN 0

Rev. 00 Model 615 Service Manua

Page 66

Main Assembly 9425-01, Model 615

Seq Item Nbr Description Quantity

020 482605 LCD DISPLAY 1

021 600076 RIBBON CABLE, 60 PIN 1

022 250166 PUMP 1

023 282024 SCREW, M2 X .4 X 8MM L 2

024 285050 SHOULDER WASHER, NYLON 2

025 161108 FOAM TAPE, 1/32THK x 3/4W 0

Main Board Assy 2754-01, Model 615

Seq Item Nbr Description Quantity

000 487100 IC, TC1426COA 1

000 475052 POTENTIOMETER, 1K OHM 1

000 474245 RESISTOR, 1M OHM, 1/16W, 6

000 213900 CONNECTOR, 60 PIN, HEADER 1

000 154106 CAPACITOR, 22PF, 50VD 2

000 474241 RESISTOR, 150K OHM, 1/16W 6

000 154111 CAPACITOR, 1UF, 16VDC, 5 7

000 486825 IC, LMC7101BIN5X, OP AMP 1

000 486346 IC, TC7SOOFTE85L 4

000 487129 IC, CPC15AFH, ABSOLUTE PR 1

000 474233 RESISTOR, 10K OHM, 1/16W 49

000 484569 VOLTAGE REGULATOR 1

000 484060 TRANSISTOR, MMBT3904T 1

000 474222 RESISTOR, 10 OHM, 1/16W 2

000 481554 DIODE, BAV70LT1, DUAL 4

000 154093 CAPACITOR, 68UF, 16VDC 7

000 481549 DIODE, MBRS140T3 6

000 152096 CAPACITOR, 220UF, 35V 9

000 486790 IC, TLE2022CD, DUAL OP AMP 4

000 486049 IC, MC68332GCFC20, 20M HZ 1

000 487115 IC, INSTR AMP, LOW POWER 1

000 180029 INDUCTOR, 50MHZ CUT-OFF 2

000 180043 FERRITE BEAD, 30 OHMS 4

000 180030 INDUCTOR-CAP, 4700PF, 50V 7

000 474242 RESISTOR, 249K OHM, 1/16W 1

000 474265 RESISTOR, 1 OHM, 1/4W, 1% 1

000 481555 DIODE, MMBD7000LT1, DUAL 11

000 486348 IC, MM74HC4040M, 12-STAGE 1

000 474227 RESISTOR, 1K OHM, 1/16W 15

000 486830 IC, QUAD OP AMP, ENHANCE 1

Model 615 Service Manual Rev. 00

Page 67

Main Board Assy 2754-01, Model 615

Seq Item Nbr Description Quantity

000 474229 RESISTOR, 2.05K OHM, 1/16 4

000 211425 CONNECTOR, 4 PIN, HEADER 1

000 154081 CAPACITOR, 100PF, 100V 2

000 2752-02 FAB, MAIN BOARD 1

000 154105 CAPACITOR, 47PF, 50VD 2

000 474238 RESISTOR, 37.4K OHM, 1/16 1

000 474259 RESISTOR, 15K OHM, 1/16W 3

000 486826 IC, LTCl448CS8 1

000 474249 RESISTOR, 215 OHMS, 1/16W 1

000 154103 CAPACITOR, .001UF, 50VDC 2

000 484567 VOLTAGE REGULATOR 1

000 154112 CAPACITOR, .047UF, l6VDC 73

000 486829 IC, LTClS90CS, DUAL 12-BIT 1

000 483019 TRANSISTOR, MMBT2907ALT1 1

000 487104 IC, TC4404COA 1

000 485541 TRANSISTOR, S14947DY 3

000 486827 IC, 12-BIT ANALOG TO DIG 1

000 474269 RESISTOR, 121K OHM, 1/16W 1

000 180045 INDUCTOR, 220UH, 20%, .53 2

000 486360 IC, SN74AHCT573DB, OCTAL 2

000 486796 IC, TLC2272CD, DUAL OP AMP 2

000 474257 RESISTOR, 1 OHM, .5 W, 1% 1

000 474199 RESISTOR, 16.5K OHM, 1/16 1

000 474299 RESISTOR PACK, 10K OHM 2

000 474247 RESISTOR, lOM OHM, 1/16W 1

000 486805 IC, LM393M, DUAL VOLTAGE 1

000 482551 LED, RED, WITH LENS 1

000 474250 RESISTOR, 43.2K OHM, 1/16 1

000 486785 IC, LP339M, QUAD VOLTAGE 1

000 486051 IC, 131K X 8 BIT RAM, 85N 1

000 474284 RESISTOR, 115 OHM, 1/16W 1

000 484573 VOLTAGE REGULATOR 1

000 230024 CRYSTAL, 32.768 KHZ 1

000 2739-01 BTRY & COMM INTFC BD ASSY 1

000 474231 RESISTOR, 4.99K OHM, 1/16 5

000 474256 RESISTOR, 0 OHM 5

000 474240 RESISTOR1 100K OHM, 1/16W 20

000 474261 RESISTOR, 7.5K OHM, 1/16W 2

000 474251 RESISTOR, 61.9K OHM, 1/16 3

000 154086 CAPACITOR, 4.7UF, 10VDC 4

Rev. 00 Model 615 Service Manua

Page 68

Main Board Assy 2754-01, Model 615

Seq Item Nbr Description Quantity

000 481546 DIODE, SWITCHING, SURF MT 13

000 481547 DIODE, BAT54, HOT CARRIER 4

000 474194 RESISTOR, 2.2M OHM, 1/16W 2

000 474197 RESISTOR, 49.9K OHM, 1/16 13

000 484562 IC, LT1175CS8-ADJ, MICROP 2

000 215073 SOCKET, PLCC, 32 PIN 1

000 474294 RESISTOR, 237K OHM, 1/16W 1

000 484563 IC, LT1117CST, VOLTAGE RG 2

000 180022 INDUCTOR, 10UH, 10% 6

000 487132 IC, TL7757CPK 1

000 486807 IC, SMP04ES, QUAD SAMPLE 1

000 154113 CAPACITOR, 4700PF, 50VDC 2

000 474266 RESISTOR, 4~75K OHM, 1/8w 1

000 180054 INDUCTOR, 1.5K OHMS 1

000 474230 RESISTOR, 3.32K OHM, 1/16 2

000 485543 TRANSISTOR, MOSFET, N-CHAN 3

000 6837-10 GASKET 1

000 474239 RESISTOR, 75K OHM, 1/16W 5

000 474198 RESISTOR, 2.49K OHM, 1/16 4

000 154108 CAPACITOR, 100PF, 50VDC 20

000 474298 RESISTOR, 34K OHM, 1/16W 1

000 515092 FUSE, 3A, 32V 1

000 210141 CONNECTOR, DC PWR JACK 1

000 481552 DIODE, MBRS340T3, SCHOTTK 3

000 474224 RESISTOR, 100 OHM, 1/16W 57

000 474283 RESISTOR, 392K OHM, 1/16W 1

000 154072 CAPACITOR, .1UF, 50V, 10% 17

000 475045 E2 POTENTIOMETER, 10K OHM 1

000 486359 IC, LT1384CG 1

000 154095 CAPACITOR, 22UF, 20VDC 2

000 154104 CAPACITOR, .01UF, 50VDC 23

000 130017 TRANSDUCER, AUDIO, 2300 H 1

000 474213 RESISTOR, 10.2K OHM, 1/16 1

000 486828 IC, LT1460HCS3-2.5 1

000 487133 IC, REAL TIME CLK 1

000 486321 IC, SN74HC138D 1

000 154079 CAP, lOuF, 25V, 10%, TANT 7

000 216029 TEST POINT, SPRING LOADED 8

000 560009 TRANSFORMER, 10UH 20% 1

000 211233 CONNECTOR, 2 PIN, HEADER 1

Model 615 Service Manual Rev. 00

Page 69

Main Board Assy 2754-01, Model 615

Seq Item Nbr Description Quantity

000 154116 CAPACITOR, lOUF, 35V, 10% 2

000 474234 RESISTOR, 20.5K OHM, 1/16 2

000 400047 BATTERY, 3V, 190N AH, LITH 1

000 474225 RESISTOR, 499 OHM1 1/16w 7

000 487103 IC, TC4405COA 1

000 513010 SWITCH, SLIDE, SPDT, 4 5W 1

000 474243 RESISTOR, 324K OHM, 1/16W 2

000 485532 TRANSISTOR, 2N7002T1, N-C 14

000 474236 RESISTOR, 33.2K OHM, 1/16 3

000 474235 RESISTOR, 24.9K OHN, 1/16 5

000 486823 IC, LT1490CS8 3

000 474270 RESISTOR, 200K OHM, 1/16w 4

000 474332 RESISTOR, 6.04K OHM, 1/16 1

000 474333 RESISTOR, 210K OHM, 1/16W 1

000 2754-03 SCHEMATIC, MAIN BOARD 0

000 9475-07 PRGM, BOOT CODE & SYS CODE 1

Transducer Assy 9208-01, CAPNOSTAT® CO2 Sensor

Seq Item Nbr Description Quantity

001 2753-01 INTERFACE BOARD ASSY 1

002 9208-09 OVERALL WIRING DIAGRAM 0

003 6809-17 CABLE PREPARATION, CAPN 1

003 9369-01 CABLE ASSY, XDCR, 610 1

03A 6809-17 CABLE PREPARATION, CAPN 1

03A 9369-01 CABLE ASSY, XDCR, 610 0

004 7125-32 LABBL, SERIAL NUMBER 1

005 7143-16 RETAINING CAP 1

006 7168-01 INTEGRATED SUBASSY (ISA) 1

007 7187-26 TRANSDUCER HOUSING 1

008 7188-13 TRANSDUCER HOUSING SHIELD 1

015 161098 TAPE, KAPTON, 3/8 W X .00 0

016 280210 0-RING, .239 ID X .025 W 1

017 280211 0-RING, .472 ID X .024 W 1

017 280226 0-RING, .472 ID X .024 W 0

018 280232 SPRING CONTACT, SELF-ADHV 2

019 320039 SOLDER, 63% TIN-37% LEAD 0

020 608001 CABLE TIE, .094 X 3.62L 0

021 608007 TUBING, HEAT SHRINK, 1/4 IN 0

022 608005 TUBING, HEAT SHRINK, 1/16 FT 0

Rev. 00 Model 615 Service Manua

Page 70

Transducer Assy 9208-01, CAPNOSTAT® CO2 Sensor

Seq Item Nbr Description Quantity

023 315097 BAG, STATIC SHIELDING 1

024 315098 LABEL, ESD, REUSABLE 1

Interface Board Assy 2753-01

Seq Item Nbr Description Quantity

000 213900 CONNECTOR, 60 PIN, HEADER 1

000 482604 LED, BICOLOR, RED & GREEN 1

000 180034 FERRITE FILTER, 4 LIN 1

000 484060 TRANSISTOR, MMBT3904T 2

000 211518 CONNECTOR, 5 PIN, RIGHT 1

000 481549 DIODE, MBRSl40T3, RECT 2

000 152096 CAPACITOR, 220UF, 35V 1

000 180030 INDUCTOR-CAP, 4700PF, 50V 3

000 474278 RESISTOR, 237K OHM, 1/8W 1

000 474220 RESISTOR, ZERO OHM, 1/4W 4

000 474263 RESISTOR, 28K OHM, 1/8W 1

000 486042 IC, AT93C66-10SC 1

000 474279 RESISTOR, 562 OHM, 1/8W 1

000 180046 INDUCTOR, 18UH @ 2.5M HZ 1

000 482602 LED, GREEN, ROUND, .100 1

000 213411 CONNECTOR, 40 PIN, RCPT 1

000 280235 SPACER, LED, FOR 2 LEAD 1

000 474182 RESISTOR, 150K OHM, 1/8W 1

000 474282 RESISTOR, 4.64K OHM, 1/8W 1

000 474174 RESISTOR, 332 OHM, 1/8W 6

000 486820 IC, BQ2004SN, FAST CHARGE 1

000 474280 RESISTOR, 243 OHMS, 1/8W 1

000 515085 FUSE W FUSEHOLDER, 2A 1

000 154099 CAPACITOR, 68UF, 20VDC 2

000 154078 CAPACITOR, 1000PF, 50VDC 1

000 474161 RESISTOR, 5.9K OHM, 1/8W 1

000 481546 DIODE, SWITCHING, SURF MT 3

000 474170 RESISTOR, 301K OHM, 1/8W 2

000 180035 FERRITE FILTER, 8 LINE 2

000 474281 RESISTOR, 71.5K OHM, 1/8W 1

000 481045 DIODE, ZENER, BZT52-C5V1 1

000 180022 INDUCTOR, 10UH, 10% 1

000 474277 RESISTOR, .15 OHM, 1/2W 1

000 515087 FUSE W FUSEHOLDER, lA 1

Model 615 Service Manual Rev. 00

Page 71

Interface Board Assy 2753-01

Seq Item Nbr Description Quantity

000 154072 CAPACITOR, .1UF, 50V, 10% 8

000 482601 LED, YELLOW, ROUND, .100 1

000 280233 SPACER, LED, FOR 2 LEADS 1

000 482603 LED, BICOLOR, RED/YELLOW 1

000 216029 TEST POINT, SPRING LOADED 1

000 154116 CAPACITOR, lOUF, 3SV 2

000 211639 CONNECTOR, 6 PIN, RCPT 1

000 2753-03 SCHEMATIC, INTERFACE BOA 0

000 483020 TRANSISTOR, FMMT7l7, PNP 1

000 474136 RESISTOR, 1K OHM, 1/8W 3

000 280234 SPACER, LED, FOR 3 LEADS 2

000 2753-02 FAB, INTERFACE BOARD 1

001 154079 CAP, 10uF, 25V, 10%, TANT EA 2

Rev. 00 Model 615 Service Manua

Page 72

[This page intentionally blank.]

Model 615 Service Manual Rev. 00

Page 73

Drawings

Drawing No. Code Description Sheets

9425 09 Overall Wiring Diagram, Model 615 1

9208 09 Overall Wiring Diagram, Transducer Assy, CAP-

9425 00 Final Assembly, Model 615 1

9425 01 Main Assy, Model 615 3

2753 01 Interface Board Assy, Model 615 1

2753 03 Interface Board Schematic, Model 615 1

2754 01 Main Board Assy, Model 615 3

2754 03 Main Board Schematic 8

NOSTAT® III, Model 615

Rev. 00 Model 615 Service Manua

Page 74

Page 75

Page 76

Page 77

Page 78

Page 79

Page 80

Page 81

Page 82

Page 83

Page 84

Page 85

Page 86

Page 87

Page 88

Page 89

Page 90

Page 91

Page 92

Page 93