LC101 CO2 Module OEM Implementation Manual
LC101 CO2 Module OEM Implementation Manual Copyright © 2002 by Welch Allyn OEM Technologies. Welch Allyn® is a registered trademark, and Pryon™ is a trademark of Welch Allyn, Inc. Welch Allyn, Inc. is protected under various patents and patents pending. Welch Allyn OEM Technologies is a division of Welch Allyn, Inc. Disclaimers: Welch Allyn OEM Technologies cautions the reader of this manual: • This manual may be wholly or partially subject to change without notice. • All rights are reserved.
LC101 CO2 Module OEM Implementation Manual Table of Contents Section 1 Functional Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 Intended Use . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 Terminology. . .
LC101 CO2 Module OEM Implementation Manual Section 4 Host/Module Communications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25 Communication Interface. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25 System EEPROM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26 Packet Structure . . . . . . . . . . . . . . . . . . . . . .
LC101 CO2 Module OEM Implementation Manual Electromagnetic Interference. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54 Electromagnetic Susceptibility. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54 Compliance Testing Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54 ISO 9918 and EN 864 . . . . . .
LC101 CO2 Module OEM Implementation Manual Appendix F CO2 Developer’s Kit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 83 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 83 Disclaimer. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 83 Software Installation . . . . . .
LC101 CO2 Module OEM Implementation Manual Section 1 Functional Description Introduction The LC101 Module is designed to control and acquire data from an internal Welch Allyn OEM Technologies CO2 bench. Utilizing a pump to aspirate the patient sample to the CO2 bench, the CO2 concentration in the patient’s expired respiratory gas can be obtained. The sidestream system includes an internal sidestream CO2 bench, electronics and pneumatic components.
LC101 CO2 Module OEM Implementation Manual Terminology Capnography is the noninvasive measurement and graphic display of airway CO2 concentration as a function of time. The resulting waveform is called a capnogram. The evaluation of the capnogram is useful in the assessment of the adequacy of carbon dioxide exchange in the lungs, integrity of the patient’s airway, cardiopulmonary function and ventilator function.
Section 1 - Functional Description LC101 CO2 Module OEM Implementation Manual The basic components of the CO2 sensor (C-Cap bench) include • IR source • Dual element IR detector • optical filter • non-volatile memory The IR source emits energy that is directed toward a dual element thermopile IR detector. The dual element design uses two opposing thermopiles connected in series. As the ambient temperature changes, the two elements change in similar fashion resulting in an output near zero.
LC101 CO2 Module OEM Implementation Manual Measurement Compensation IR absorption in the CO2 wavelength band may be affected by a number of factors that alter the CO2 measurement. The LC101 Module automatically compensates for some of these factors while others may be disabled by the host system.
LC101 CO2 Module OEM Implementation Manual Section 1 - Functional Description O2/N2O/desflurane O2/N2O/desflurane compensations account for the effects that these gases have on the IR absorption characteristics of CO2 molecules. Refer to Appendix A Software Procedures for a description of this effect and a recommendation for enabling these compensations. The O2/N2O/desflurane compensations are OFF by default and may be enabled or disabled via a host system command.
LC101 CO2 Module OEM Implementation Manual Reset Circuit The first section of a 556 timer is connected to a serial receive data line such that the microprocessor is forced into reset if the data line is held in a break condition for greater than 10 msec. A second timer section is used to determine if the break condition is maintained for more than 500 msec. Holding the receive data line in a break condition for a period of time greater than 10 msec and less than 500 msec is referred to as a reset.
LC101 CO2 Module OEM Implementation Manual Section 1 - Functional Description Sidestream Components The functional components necessary for sidestream operation include • pump • watertrap and watertrap receiver assembly • inlet and exhaust tubing • CO2 sample line • cannula The flow control circuitry regulates flow by using a fixed orifice flow sensor that provides feedback to a circuit that controls power to the pump.
LC101 CO2 Module OEM Implementation Manual Inlet and Exhaust Tubing The internal inlet tubing provides the means to transport the gas sample from the watertrap receiver to the sidestream bench. The inlet tubing includes the tubing, connectors and a secondary shutoff pellet. Attachment of the inlet tubing to the watertrap receiver is via a Luer® connector. A secondary shutoff pellet is attached in line with the inlet tubing to provide additional backup.
LC101 CO2 Module OEM Implementation Manual Section 2 LC101 Module Interface Power Requirements Description Typical Input voltage range 5 V regulated, or +5.75 to +14.50 Vdc Ripple 100 mV peak-to-peak Typical non-measurement mode power 570 mW at 8 Vdc Typical operating power 1.3 W at 8 Vdc Typical occluded power 1.5 W at 8 Vdc LC101 Main Board Description Specification Dimensions 3.15 in. L x 3.90 in. W x 1.00 in. H (80.3 mm × 99.
LC101 CO2 Module OEM Implementation Manual LC101 Module Interface Connector The LC101 Module interface connector is a 4-pin connector (Molex P/N 22-11-2042). The host may use a 4-pin polarized housing (Molex P/N 22-01-3047 with Molex 2759 series terminals) or equivalent. Pin Signal Signal Description 1 Vina input power 2 gnd ground 3 TXD data from Main Board to host system 4 RXD data from host system to Main Board a. The “square” plated through-hole designates pin 1 on the Main Board.
LC101 CO2 Module OEM Implementation Manual Section 2 - LC101 Module Interface Watertrap Receiver Switch The watertrap receiver switch is wired in the “normally open” configuration. The watertrap receiver switch connects directly to the Main Board via a wiring harness and connector. The watertrap receiver switch assembly is equipped with a 2 pin connector (Molex P/N 22-01-3027) which electrically connects directly to the Main Board at J102.
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LC101 CO2 Module OEM Implementation Manual Section 3 LC101 Calibration The LC101 Module requires periodic user calibration to adjust offset voltages and calibration constants used by the internal C-Cap bench. There are two types of calibration, each supported in the LC101 software protocol: • Zero Calibration • Two-Point User Calibration Zero Calibration The Zero Calibration adjusts the offset voltage used by the C-Cap to generate the CO2 values and the IR source current.
LC101 CO2 Module OEM Implementation Manual To get an accurate calibration, the LC101 needs to be operating for at least 5 minutes in measurement or autorun mode with the scrubber installed. The LC101 internally monitors the run time and will not allow a Zero Calibration if the run time requirement has not been met. The LC101 monitors the calibration progress and provides a “Calibration OK” (or “not OK”) message to the host system when polled for status.
LC101 CO2 Module OEM Implementation Manual Section 3 - LC101 Calibration Two-Point User Calibration NOTE Before performing a Two-Point User Calibration, a separate Zero Calibration must be performed first. It is also recommended that both calibrations be performed at 75ºF in order to maintain accuracy over the Module’s operating temperature range. The Two-Point User Calibration, or User Calibration, updates two of the gas calculation constants used to generate the CO2 values.
LC101 CO2 Module OEM Implementation Manual Two-Point User Calibration Procedure Illustration of gas canister, regulator and pneumatic circuit Tee Free Flow Away From Monitor Input On/Off Regulator 10% CO2 Bal. N2 To Monitor Water Trap Two-Point User Calibration Equipment Setup Equipment needed: • calibration gas canister (8 – 12% CO2, ±0.
LC101 CO2 Module OEM Implementation Manual Section 3 - LC101 Calibration To Perform a Two-Point User Calibration: The user is required to apply a 0% CO2, or “zero” gas, and also apply a gas of known CO2 concentration (referred to as “span” gas) during the various steps of a Two-Point User Calibration. The user is required to manually enter the value of the Span Gas applied into the Monitor.
LC101 CO2 Module OEM Implementation Manual Troubleshooting • Make sure that the room is well ventilated. CO2 readings may be elevated in a closed room. • Confirm that the calibration gas is of known concentration. If the CO2 readings are consistently elevated or depressed, the calibration gas may be suspect. Try another gas source. • Make sure that the CO2 module was properly set up and operating for the required minimum period before testing. • Check for air leaks in the pneumatic tubing and connections.
LC101 CO2 Module OEM Implementation Manual Section 4 Host/Module Communications The LC101 Module is a command driven slave device capable of communicating with a host system over an asynchronous serial communication line. After the host system commands the LC101 Module to begin transmission of CO2 waveform and breath data packets, the Module sends periodic packets without additional intervention by the host system. The host system must initiate all other communication with the LC101 Module.
LC101 CO2 Module OEM Implementation Manual System EEPROM The system EEPROM contains manufacturing and operational data that is necessary for the LC101 Module to function. A limited number of these system parameters may be specified by the OEM. These include • data format • start up mode • initial pump flow rate The data format options are 7 and 8 data bits (default is 7E1). The start up mode options are auto run, measurement, standby and fault (default is standby).
LC101 CO2 Module OEM Implementation Manual Section 4 - Host/Module Communications Host Commands The host communicates to the Module via commands. These include: • mode commands to request a change in the operating mode. • simple commands to request data or a status change. Data is not sent with these commands. • configuration commands to specify custom system settings. Data is sent with these commands. • calibration commands to request a Zero or User Calibration sequence. Data is sent with these commands.
LC101 CO2 Module OEM Implementation Manual Simple Commands Simple commands instruct the Module to send Module data or EEPROM data and to reset the Module software or reset sensor error.
LC101 CO2 Module OEM Implementation Manual Section 4 - Host/Module Communications Configuration Commands Configuration commands instruct the Module to temporarily modify specific default settings for measurement criteria. A new pump flow rate may also be specified. The host does not have to command the Module into the unprotected mode prior to issuing a new flow rate command. A description of these commands is included in the following table.
LC101 CO2 Module OEM Implementation Manual Page 30 Change breath data update rate Allows the host to specify how often the Module sends a breath data packet. where xx (ASCII) is converted to a 8 bit binary number (yyzz zzzz) with yy defining how often the breath data is updated. If yy = 00 binary, Breath data packet update rate is defined by zzzzzz, where zzzzzz is in tenths of seconds. The 6 lower bits = (seconds × 10). Odd values are rounded up to even values.
LC101 CO2 Module OEM Implementation Manual Section 4 - Host/Module Communications Function enable Allows the host to enable or disable functions listed below. where xx (ASCII) is the compensation and y (ASCII) is ON/OFF status.
LC101 CO2 Module OEM Implementation Manual Calibration Commands Calibration commands instruct the Module to update the gas calculation or the zero offset constants used to generate the CO2 values. At the end of a successful calibration, new constants are stored in EEPROM memory. Data is required with these commands. There are two types of calibration: Two-Point User Calibration and Zero Calibration.
LC101 CO2 Module OEM Implementation Manual Section 4 - Host/Module Communications Zero Calibration The Zero Calibration adjusts the IR source current to compensate for detector output changes. The host is required to inform the LC101 Module when to start sampling 0% CO2 gas. When performing a Zero Calibration, the LC101 Module must first be in either Unprotected 'Measurement' or 'Autorun' mode. During the calibration, CO2 waveform and Breath data will still be sent to the host.
LC101 CO2 Module OEM Implementation Manual Status Responses Status responses are data packets that communicate Module, sensor and system status. The status response also serves as an acknowledgement for mode commands.
LC101 CO2 Module OEM Implementation Manual Section 4 - Host/Module Communications Status Response Message Byte where yy = Status message (2 Hex digits = 2 ASCII characters) Status Response message byte (yy) contains: • generic status messages (00h – 06h) • fault status messages (10h – 85h) Refer to the Status Message Table at the end of this section for message descriptions. More detailed information about fault messages is also available in Appendix C, Error Messages & Recovery.
LC101 CO2 Module OEM Implementation Manual Simple Command Responses Host Command Module Response Module Response Format Request Module status xx = mode yy = message Example: 64= Autorun mode 00= OK status Request software version xxx = version # mm = version month dd = version day yyyy = version year Example: version = 1.30 date = 10-23-1998 Request hardware version xx = hardware version Example: hardware version = 2.
LC101 CO2 Module OEM Implementation Manual Section 4 - Host/Module Communications Request single breath packet xx = ETCO2 mmHg yy = RR bpm ww = InsCO2 mmHg Example: ETCO2= 32 RR= 21 InsCO2= 0 Request current pump flow rate xxxx = pump flow rate ml/min Example: flow rate = 150 ml/min Request sensor EEPROM revision # Request sensor customer code xx = revision # Example: revision # = 2 xx = customer code Example: c
LC101 CO2 Module OEM Implementation Manual Configuration Command Responses Configuration responses are data packets sent by the Module to the host at programmed intervals. A single host measurement or auto run mode command initiates unsolicited transmission of CO2 waveform and breath data packets. The programmed interval between packets is either defined by the host via a configuration command or the host may use the default setting.
LC101 CO2 Module OEM Implementation Manual Section 4 - Host/Module Communications , Breath Data Includes 6 bytes of breath data that are sent at the programmed interval during measurement and auto run modes.
LC101 CO2 Module OEM Implementation Manual Calibration Command Responses Host Command Module Response Module Response Format Update calibration date xx = mode yy = message Example: 64= Autorun mode 24= Cal. ready for next step Example: 64= Autorun mode 21= Cal. already in progress Update span gas concentration xx = mode yy = message Example: 64= Autorun mode 24= Cal. ready for next step Example: 64= Autorun mode 22= Cal.
LC101 CO2 Module OEM Implementation Manual Section 4 - Host/Module Communications Software Protocol Packets • Module must respond within 1 second after receiving a host command (50 msec typical response time). • There is no minimum time interval between packets. • Host must request Module status periodically to confirm the fault/OK status of the Module and sensor. • Host must either receive a Module response or have exceeded the Module response timeout of 1 second before issuing a new command.
LC101 CO2 Module OEM Implementation Manual • Hard Reset - If the host holds the receive data line in a break condition for more than 500 msec, the microprocessor is forced to enter the boot mode when the break condition is released. The microprocessor boot mode is used to install new software into the FLASH device. Internal Resets (Initiated within the LC101 Module) • Watchdog Reset - Watchdog reset is caused by a watchdog timeout.
LC101 CO2 Module OEM Implementation Manual Section 4 - Host/Module Communications If the LC101 Module was in 'Measurement' mode and the watertrap was not detected for 30 seconds, the Module will switch to 'Standby' mode. As before, the LC101 will return the "No Watertrap" status message (i.e., ) in response to any status request. Even in 'Standby' mode, this status message can only be eliminated if a watertrap is inserted, the host sends a mode change command, or a fault event is detected.
LC101 CO2 Module OEM Implementation Manual Status Message Code Table Code (hex) Suggested Message 00 01 02 03 06 11 Status OK Invalid Command Invalid Data Unprotected or Unprotected Operation Acknowledge Mode Command CO2 Sensor Start Up In Progress 15 16 17 18 21 22 23 24 25 26 27 28 29 2A 40 44 46 47 4B 4C 4D 4E 4F 51 57 60 Vacuum Offset too Large No Watertrap Watertrap Or Cannula Occlusion Exhaust Occlusion Or Pneumatic Leak Calibration Already in Progress Calibration Not in Progress Low Run Time Ca
LC101 CO2 Module OEM Implementation Manual Section 4 - Host/Module Communications Host Command/Module Response Overview Table Command Command Description Response Response Description Enter standby mode Acknowledge with Module status Enter measurement mode Acknowledge with Module status Enter auto run mode Acknowledge with Module status (Invoked with enter measurement or auto run mode command) CO2 waveform data packets sent at programmed i
LC101 CO2 Module OEM Implementation Manual System Component Status The following table lists the state of the system components based on the LC101 Module’s mode.
LC101 CO2 Module OEM Implementation Manual Section 5 Pneumatic Operation The LC101 Module Pneumatic System is responsible for controlling the flow to the sidestream bench in order to measure the patient’s CO2 level. The Pneumatic System must set the flow as commanded by the host and keep it within flow specifications. Conditions such as inlet/exhaust irregularities, internal pneumatic disconnects and pump failures are detected by the Pneumatic System.
LC101 CO2 Module OEM Implementation Manual Pneumatic Events Pneumatic events which may occur include • total inlet occlusion • partial inlet occlusion • total exhaust occlusion • partial exhaust occlusion • barometric pressure out of range • unexpected reverse flow • unexpected forward flow Total Inlet Occlusion A total blockage in some region of the inlet tubing, or a total inlet occlusion, is typically caused by a kinked or occluded sample line, a fully saturated watertrap or an occluded secondary shuto
LC101 CO2 Module OEM Implementation Manual Section 5 - Pneumatic Operation A condition of unstable operation may be evident when a partial blockage approaches the occlusion threshold limits, causing the Module to toggle between normal and occlusion states. If the blockage increases enough to completely occlude the inlet tubing, the Module reverts to the total inlet occlusion state.
LC101 CO2 Module OEM Implementation Manual Unexpected Forward Flow This condition occurs when the pneumatic input is connected to a positive pressure source, or flow source. The flow control circuitry checks the Pneumatic System for this condition prior to turning ON the pump. If a positive pressure exists on the exhaust prior to the pump starting, the Module reverts to the fault mode.
LC101 CO2 Module OEM Implementation Manual Section 5 - Pneumatic Operation Pump Exhaust If a pneumatic connection at the pump exhaust is loose at either the pump exhaust or internal monitor exhaust port, gas build up within the host monitor can occur. The Module does not report this fault to the host. WARNING When using oxygen or flammable anesthetics, a pump exhaust leak can present a fire hazard.
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LC101 CO2 Module OEM Implementation Manual Section 6 Regulatory IEC 601-1-2 (EN 60601-1-2) Welch Allyn OEM Technologies The LC101 Module meets the requirements of IEC 601-1-2 (EN 60601-1-2). Although sidestream devices do not require patient isolation, the host system must not bridge the isolation barrier with any subcomponents of the LC101 Module. All components with electrical connections to the Main Board must be properly insulated from non-isolated power.
LC101 CO2 Module OEM Implementation Manual Electromagnetic Interference The LC101 Module meets the following EMC requirements without enclosure. • Radiated Emissions - tested per CISPR 11, 1990 • Magnetic Field Emissions - tested per RE101 Electromagnetic Susceptibility The LC101 Module meets the following EMC requirements without enclosure.
LC101 CO2 Module OEM Implementation Manual Appendix A Software Procedures O2/N2O/Desflurane Compensation The presence of oxygen, nitrous oxide and desflurane in the gas sample affects the measurement of the CO2 concentration. This section describes this effect and recommends a method for applying the compensation when these gases are present. Correction For O2 As the N2 in the sample gas is replaced by O2, the effect is a decrease in IR absorption.
LC101 CO2 Module OEM Implementation Manual Correction For Desflurane The effect of desflurane on the CO2 measurement is similar to the effect of N2O. For desflurane concentrations above 12%, the N2O correction may be used. Summary of O2, N2O, and Desflurane Compensation The LC101 Module compensations for O2, N2O and desflurane are OFF by default and must be enabled by the host via menu selection or other means. The variables and correction equations are summarized in this table.
LC101 CO2 Module OEM Implementation Manual Appendix A - Software Prodedures 1. Initialize breath data update rate . 2. Request ambient barometric pressure . 3. Divide ETCO2 (in mmHg) value by ambient barometric pressure (in mmHg). The result is the ETCO2 value as a percentage of the barometric pressure. Zero Calibration Sequence Example Seq. Host 1 Module Host sends Unprotect command.
LC101 CO2 Module OEM Implementation Manual Two-Point User Calibration Sequence Example NOTE Before performing a Two-Point User Calibration, a separate Zero Calibration must be performed first. It is also recommended that both calibrations be performed at 75ºF in order to maintain accuracy over the Module’s operating temperature range. Seq Host 1 Module Host sends Unprotect command.
LC101 CO2 Module OEM Implementation Manual 6 Host sends Sample CO2 Span Gas command. 7 Module responds with status - Calibration in Progress, or if not in unprotected measurement or autorun mode, response is Invalid Operation (use ), or if a calibration had not been started, response is Cal. Not in Progress, or if the calibration has exceeded its maximum time allowed, response is Unable to Perform Cal., Missing Parameters.
LC101 CO2 Module OEM Implementation Manual CRC The CRC is performed on the byte stream, not on the corresponding values of the ASCII hex characters. The CRC check should be performed at a very low level within the host's software. The host calculates a CRC of the actual transmitted bytes excluding the check byte (which is sent as two ASCII HEX characters).
LC101 CO2 Module OEM Implementation Manual Appendix A - Software Prodedures The table can be created by the following code: void make_table_8(void) { const unsigned char feedback_8=0xA1; unsigned char CCITT/CRC; unsigned int i; unsigned char j,tmp; for (i=0; i<256;i++){ tmp=i CCITT/CRC=0; for (j=0; j<8;j++){ if ((tmp&1)^(CCITT/CRC&1)) CCITT/CRC=(CCITT/CRC>>1)^feedback_8; else CCITT/CRC>>1; tmp>>=1; } CCITT/CRC_table_8[i]=CCITT/CRC; } } Software Upgrade The LC101 Module's software may be updated in the fi
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LC101 CO2 Module OEM Implementation Manual Appendix B EEPROM Memory Map System EEPROM Map Table Word (hex) Register 00 01 Description 16 bit CCITT/CRC word/range: 01h to 2Ah LSB MSB 02 Low nibble- EEPROM minor revision High nibble- EEPROM major revision Customer code. Main Board serial # / range: 0000h to FFFFh 03 LSB MSB Hardware version Reserved for future use.
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LC101 CO2 Module OEM Implementation Manual Appendix C Error Messages & Recovery This appendix lists and defines the LC101 Module status codes. Recovery attempts are suggested if the status indicates a fault condition. The fault conditions are grouped into three categories. • Advisories - Non-fatal conditions which do not halt Module operation. • Soft faults - Conditions which interrupt Module operation, including transmission of CO2 waveform and breath data packets, until the fault is cleared.
LC101 CO2 Module OEM Implementation Manual Advisories LC101 Advisories Status Message Code (hex) Definition Possible Causes 00 status ok 01 communication error • host/Module communication is in error 02 host command with invalid data • identifier is inconsistent with data 03 unprotected operation violation • host attempts to invoke a protected operation 06 acknowledge command 11 CO2 sensor startup in progress • status requested during CO2 sensor startup phase 27 calculation error • cal
LC101 CO2 Module OEM Implementation Manual Appendix C - Error Messages & Recovery 15, Vacuum Offset Too Large The Module detects a vacuum condition prior to the pump turning on. Transmission of CO2 waveform and breath data packets will not begin. The pump is disabled during this advisory. This message could also indicate that one or both transducers are faulty. • Verify that no external vacuum is applied to the monitor’s CO2 inlet port.
LC101 CO2 Module OEM Implementation Manual • Verify that the pump is operating by resetting the mode and listening for audible pump operation noise. • Refer to Section 5, Pneumatic Operation, for additional information. Calibration Advisories Calibration advisories interrupt the calibration operation until the condition is cleared. The calibration sequence continues after the condition is addressed by the host/user. Calibration advisory messages include 21 through 26.
LC101 CO2 Module OEM Implementation Manual Appendix C - Error Messages & Recovery 24, Calibration Ready for Next Step The calibration sequence has been initiated, and the Module requires data commands from the host to proceed to the next calibration step. 25, Calibration in Progress The Module is carrying out the calibration process. 26, Calibration OK The Module has successfully performed a calibration, and the new constants have been stored in the EEPROM.
LC101 CO2 Module OEM Implementation Manual 29, Unable to Perform Calibration, Data Error The acquired CO2 data is invalid or out of range for the calibration. The Module will abort the calibration. This error also occurs when calibration is aborted due to any other non-fatal error. 2A, Bad Calibration CRC The system EEPROM CRC is not valid after being updated with the new constants. Sensor Faults CO2 sensor faults are conditions that result in shutting down the sensor.
LC101 CO2 Module OEM Implementation Manual Appendix C - Error Messages & Recovery 57, CO2 Sensor Not Found CO2 Bench, or C-Cap, not present on Main Board. 60, CO2 Sensor EEPROM Error/Revision # Revision # read from the CO2 sensor EEPROM is not in the 1.xx format. 65, CO2 Sensor EEPROM Error/Read/Write A read or write error to the CO2 sensor EEPROM has occurred. 66, CO2 Sensor EEPROM Error/CCITT/CRC Code CCITT/CRC code read from the CO2 sensor EEPROM is invalid.
LC101 CO2 Module OEM Implementation Manual System Faults The majority of system faults are conditions that are internal to the Module and not caused by the host. The exceptions are 81h, 82h, 84h and 85h. To clear most system faults: • Do a reset (with the exception of 81, 82, 84 and 85).
LC101 CO2 Module OEM Implementation Manual Appendix C - Error Messages & Recovery 40, Watchdog Error Watchdog timeout has occurred. 44, System EEPROM Error/CCITT/CRC Code CCITT/CRC code read from the system EEPROM is invalid. 46, System FLASH ROM Error/CCITT/CRC Code CCITT/CRC code read from the system FLASH ROM is invalid. 47, System Communication Error 4B, System External RAM Error 4C, System Internal RAM Error 4D, System FLASH ROM Error/Checksum Checksum read from the system FLASH ROM is invalid.
LC101 CO2 Module OEM Implementation Manual • Check the exhaust tubing for an improper connection to a vacuum source. • Refer to Section 5, Pneumatic Operation, for additional information. 84, Barometric Pressure Too High Barometric pressure transducer reading is greater than the upper barometric limit. • Check that the host monitor is operating at barometric pressures less than 824 mmHg (1,300 ft below sea level). • Possible transducer error.
LC101 CO2 Module OEM Implementation Manual Appendix D Welch Allyn OEM Technologies Part Numbers and Accessories Module Configurations Module Configuration Description Welch Allyn OEM Technologies Part Number LC101 Module (generic) 000.10100 Watertrap Receiver, gray, 2.385 in, with Switch Assembly 002.00086 Watertrap Receiver, black, 2.385 in, with Switch Assembly 002.00164 Watertrap Receiver, gray, 1.615 in, with Switch Assembly 002.00091 Pump Assembly (with wire harness) 002.
LC101 CO2 Module OEM Implementation Manual Accessories Available From Welch Allyn OEM Technologies NOTE: The following accessories are recommended for use with the LC101 Module and may be ordered from Welch Allyn OEM Technologies. The end user must be instructed in the end-user documentation such as the Operator’s Manual to follow the accessory manufacturer’s directions for use when using any accessories. Accessory Description Welch Allyn OEM Technologies Part Number Watertrap - box of 24 000.
LC101 CO2 Module OEM Implementation Manual Appendix E Specifications LC101 Main Board PHYSICAL SPECIFICATIONS Size 3.15 in. x 3.90 in. (80.3 mm x 99.3 mm) Clearance 0.85 in. (22 mm) above board, 0.12 in (3 mm) below board Orientation No limitations Weight Less than 1 pound (454 grams) with full pneumatics.
LC101 CO2 Module OEM Implementation Manual ENVIRONMENTAL SPECIFICATIONS Ambient Operating Range Temperature Humidity Barometric Pressure Pressure Compensation 5o to 55oC (50o to 131oF) 15% to 95% RH (non-condensing) 420 to 795 mmHg (15,500 feet to -1300 feet) Automatic at power on and watertrap replacement Ambient Shipping/Storage Range Temperature Humidity Barometric Pressure -40o to 70oC (-40o to 158oF) 10% to 100% RH (non-condensing) 375 to 795 mmHg (45,000 feet to -1300 feet) INTERFACE SPECIFICATIO
Appendix E - Specifications LC101 CO2 Module OEM Implementation Manual Assembly Drawings Pump exhaust Inlet (Ref. 000.10100.UOO Rev. 0) LC101 Module - ISO View (Ref. 000.10100.UOO Rev. 0) LC101 Module - Side View (Ref. 000.10100.UOO Rev.
LC101 CO2 Module OEM Implementation Manual Receiver switch wires Watertrap Receiver Assembly Watertrap CO2 Absorber Watertrap and CO2 Absorber Page 80 Confidential Welch Allyn OEM Technologies
LC101 CO2 Module OEM Implementation Manual Appendix E - Specifications CO2 Absorber Material Safety Data Sheet (MSDS) Welch Allyn OEM Technologies Confidential Page 81
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LC101 CO2 Module OEM Implementation Manual Appendix F CO2 Developer’s Kit Introduction The CO2 Developer’s Kit provides hardware and software to simulate a monitoring system capable of measuring and displaying real-time carbon dioxide measured in a patient’s exhaled breath. The system also displays breath parameters such as end-tidal CO2, inspired CO2, and respiration rate.
LC101 CO2 Module OEM Implementation Manual Software Installation To install this software on a Windows 95/98/NT computer, do the following: 1. Insert the CO2 Monitor Windows Software CD into the computer’s CD-ROM drive. 2. Follow the screen instructions to install the software. If the CO2 Monitor software setup program does not start automatically, follow these steps: Open My Computer, Windows Explorer, or File Manager. Double click on the CD drive letter (usually D:,E:, or F:). Double click Setup.exe.
LC101 CO2 Module OEM Implementation Manual Appendix F - CO2 Developer’s Kit Overview Main Screen Illustration Located on the Main Screen are the real-time CO2 waveform graph and the Breath Parameters. The CO2 data can be reported as partial pressure (mmHg) as shown in the illustration or in percent units (see Menu Options Description below). The Breath Rate is reported in breaths per minute. The update rate of the CO2 waveform and the Breath Parameters depends on how the CO2 module is configured.
LC101 CO2 Module OEM Implementation Manual Menu Options Description The File menu contains the following items: File Calibration Zero Two Point Configure Capture Enable Setup Simulate Print Form Exit File\Calibration (LC-101 Module only) - Calibration is available under the File menu. Two different calibrations are available; Zero and Two Point. The Zero calibration is a single point calibration performed with either room air or reference air with 0% CO2.
Appendix F - CO2 Developer’s Kit LC101 CO2 Module OEM Implementation Manual The Configuration menu provides a means to setup up how the CO2 Monitor functions. The configuration items are saved and restored at start up of the CO2 Monitor application. The Configuration menu contains the following items: Configure Mode Mainstream Sidestream Display Units mmHg Percent Sweep Rates CO2 Scale 6.25 mm/sec 12.
LC101 CO2 Module OEM Implementation Manual Configure\ Display\CO2 Scale - The CO2 waveform scale can be changed in the Configure\Display\CO2 Scale menu item. The selections are listed below. 50 mmHg 6% 75 mmHg 10% 100 mmHg 14% Configure\ Display\Gridlines - Horizontal gridlines on the waveform graph can be enabled by checking the Gridlines menu item. Configure\ Display\Waveform Fill - The Waveform Fill feature can be enabled by checking the Waveform Fill menu item.
LC101 CO2 Module OEM Implementation Manual Appendix F - CO2 Developer’s Kit CO2 Evaluation Platform NOTE Backside (not shown) provides connectors for DC power input and RS-232 interface.
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LC101 CO2 Module OEM Implementation Manual Glossary Absolute Pressure Transducer - A device that converts a nonelectrical parameter, pressure, into an electrical signal. The ambient pressure transducer on the Module is used to measure either ambient barometric pressure or the internal bench pressure during pump operation. Advisory - Least serious type of fault message. Usually indicates casual user intervention required.
LC101 CO2 Module OEM Implementation Manual BTPS - Body Temperature, ambient Pressure, gas Saturated with water vapor. Describes the conditions in which a gas measurement was taken. BTPS Compensation - Mathematical correction for the environmental differences between the measurement site (i.e. the measurement bench) and “deep lung” CO2. Cannula - A device, or tubing, used to deliver oxygen to a patient orally or nasally.
LC101 CO2 Module OEM Implementation Manual Glossary Desflurane Compensation - Mathematical correction applied to the CO2 measurement to account for the effects of Desflurane on the CO2 concentration. Differential Pressure Transducer - An electronic device that converts a nonelectrical parameter into an electrical signal. A differential transducer has two inputs and produces an output signal that is a function of the difference between the inputs.
LC101 CO2 Module OEM Implementation Manual IEC 801-1 - The electromagnetic compatibility for Industrial Process and Measurement and Control Equipment. IEC 1000 - Electromagnetic Compatibility Testing and Measurement Techniques. Infrared Radiation (IR) - The portion of the electromagnetic spectrum of radiation extending from about 730 nanometers to about one millimeter in wavelength. Inlet Occlusion - Obstruction of the inlet port or pneumatics upstream from the sample chamber.
LC101 CO2 Module OEM Implementation Manual Glossary N2O Compensation - Mathematical correction applied to the CO2 measurement to account for the effects of Nitrous Oxide on the CO2 concentration. O2 - Oxygen. O2 Compensation - Mathematical correction applied to the CO2 measurement to account for the effects of oxygen on the CO2 concentration.
LC101 CO2 Module OEM Implementation Manual Set Flow Rate - The rate of flow commanded by the host system. The actual flow rate must be within +15, -20% of this setting. Short Watertrap Receiver - A Welch Allyn OEM Technologies accessory that mechanically interfaces the Welch Allyn OEM Technologies watertrap with the host system. The short receiver positions into the host system leaving a large part of the watertrap exposed externally. (See Long Watertrap Receiver.
LC101 CO2 Module OEM Implementation Manual Glossary Trachea - A passageway (the “wind pipe”) that conducts air from the larynx to the main stem bronchi. Tracheostomy - The cutting of an opening into the trachea. User - The end-user or operator of the device. Ventilator - A machine or device that provides a constant supply of oxygen and/or air to the lungs by the movement of gas into and out of the pulmonary system.
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