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Instruction Manual
GEMINI
End-tidal O
Read instructions carefully before operating this device.
This device is not to be used for Human Life Support applications.
To avoid possible electrical shock, do not operate this device if is wet or has had
liquids spilled onto it.
Service or calibration procedures should only be performed by qualified
personnel familiar with the electrical hazards of line-powered devices.
www.cwe-inc.com
& CO
Analyzer
2
2
Ardmore PA 19003 U.S.A.
(610)642-7719
info@cwe-inc.com
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Summary of Contents for CWE GEMINI
- Page 1 Instruction Manual GEMINI End-tidal O & CO Analyzer Read instructions carefully before operating this device. This device is not to be used for Human Life Support applications. To avoid possible electrical shock, do not operate this device if is wet or has had liquids spilled onto it.
- Page 2 LIFE SUPPORT POLICY Instruments manufactured by CWE, Incorporated are not authorized for use as critical components in human life support devices or systems. "Life support devices or systems", as used herein, are devices or systems whose failure to perform, whether through misuse, failure, or proper operation, can reasonably be expected to result in significant injury to the operator or subject persons.
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Page 3: Table Of Contents
GEMINI O & CO Analyzer Instruction Manual Table of Contents 1.0 INTRODUCTION ....................... 4 2.0 SETTING UP THE GEMINI ..................5 3.0 OPERATION ......................6 3.1 DISPLAY FUNCTIONS ........................7 3.2 CALIBRATION FUNCTIONS ......................7 3.21 GAS ZERO CALIBRATIONS ......................8 3.22 GAS SPAN CALIBRATIONS ...................... -
Page 4: Introduction
A USB port is provided for connection to an external computer, whereby serial data can be independently collected and analyzed. A special feature of the GEMINI is Metabolic Mode, where the response time is slower, but with a 10X increase in gas measurement resolution. This is especially useful for making oxygen consumption measurements with a metabolic chamber where breath-by-breath response is not necessary. -
Page 5: Setting Up The Gemini
Analyzer Instruction Manual 2.0 SETTING UP THE GEMINI Place the GEMINI close to the subject or animal being monitored. Note that the output signals are redundantly located on the front and rear panels. When monitoring small animals, it is desirable to locate the unit as close to the animal as possible to minimize sample tubing volume. -
Page 6: Operation
LED’s, and adjustment knobs at the right. These controls and functions are described in the following sections. 2: GEMINI R IGURE ESPIRATORY NALYZER CONTROLS The normal operating display screen is shown below (Figure 3). -
Page 7: Display Functions
O2 signals are always in continuous ) mode. FAST 3.2 CALIBRATION FUNCTIONS To calibrate the CO sensor, you need a gas (room air or N ) and a ZERO gas (5% or 10% CO SPAN © 2024 CWE, Inc. -
Page 8: Gas Zero Calibrations
. This gas mix is commercially available in SPAN ZERO small cannisters. NOTE: When calibrating with any compressed gas, allow the GEMINI to draw in the gas from a stream. NEVER apply compressed gas directly to the SAMPLE INLET 3.21 GAS ZERO CALIBRATIONS... -
Page 9: Gas Span Calibrations
ISPLAY SCREEN DURING A CALIBRATION 3.3 ALARM SETTINGS The GEMINI has both ETCO2 and respiratory rate ( ) user- programmable alarms. If an alarm condition is detected, the source of the alarm will be shown in the STATUS field on the display: LOW FLOW -–... -
Page 10: Etco2 Alarm Setting
MSG displayed will be “Adj RR HI, press KNOB.” Change the RR HI setting, then press the knob again to ADJUST exit. The new RR alarm settings will be saved and will be used until changed again. © 2024 CWE, Inc. -
Page 11: Adjust Knob Function
When selected, the value field will become highlighted, which you can change by rotating the knob (see Figure 8). When the desired ADJUST setting is displayed, press the knob to save it and exit. The ADJUST available AUXILIARY FUNCTIONS are described below. © 2024 CWE, Inc. -
Page 12: Metabolic Mode
UNCTIONS DISPLAY SCREEN SHOWING A SELECTED FUNCTION AND VALUE 3.61 METABOLIC MODE The GEMINI is optimized for breath-by-breath CO and O measurements. However, in some cases, speed of response is not as important as extended precision and smoothed response. For... -
Page 13: Serial Output Format
ODE DISPLAY SHOWING ADDITIONAL DIGITS OF RESOLUTION 3.62 SERIAL OUTPUT FORMAT Besides the standard analog signal outputs, the GEMINI has a serial data output via its built-in USB port (rear panel). The format of this data is set using the AUXILIARY FUNCTIONS menu. Except... -
Page 14: Breaths To Average
Where applicable, gas sensor models and serial numbers are also shown. 10: SYSTEM INFORMATION IGURE PAGE 3.66 EXIT After selecting and/or changing a function setting, the AUXILIARY FUNCTIONS menu will return to highlighting EXIT. When © 2024 CWE, Inc. -
Page 15: Rear Panel Connections
0.01V / BPM, updated on each detected breath 4.2 USB PORT The USB port provides a virtual serial port interface for external data collection and analysis. There are four formats available, which are detailed in Section 3.42 of this manual. © 2024 CWE, Inc. -
Page 16: Data Port
PIN5 ERROR out, 0V = normal, 5V = ERROR PIN6 FLOW out, 0cc/min = 0.5V, 200cc/min = 4.5V PIN7 PUMP IN input, 0V = normal, 5V = pump OFF PIN8 not used PIN9 +5V 12: DATA PORT IGURE PIN CONNECTIONS © 2024 CWE, Inc. -
Page 17: Specifications
Sample flow measurement ............0 - 200 ml/min Respiratory rate measurement range ........5 – 120 breaths/min Analog signal outputs (front and rear panel) ........BNC jacks output scaling ................ 0.25V / %CO output scaling ................40mV / %O © 2024 CWE, Inc. - Page 18 Serial data output format ......19200 baud, 8 data, no parity, 1 stop bit Electrical requirements ... 5V@4A power adapter, 120VAC/220VAC 50/60Hz Dimensions ......... 12.5W x 4.25H x 9.5D in., 32W x 11H x 24D cm Weight .................... 10 lbs. (4.5kg) © 2024 CWE, Inc.
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Page 19: Maintenance
NEVER OPERATE THE INSTRUMENT WITHOUT THE IN- LINE HYDROPHOBIC FILTER. THIS FILTER PREVENTS LIQUIDS AND OTHER CONTAMINENTS FROM ENTERING THE SAMPLE CELLS. 7.0 ORDERING INFORMATION Accessories and replacement parts for the GEMINI are available from CWE, Inc. The following table describes these items. PART No. DESCRIPTION... -
Page 20: Connection Diagrams
GEMINI O & CO Analyzer Instruction Manual 8.0 CONNECTION DIAGRAMS 13: T IGURE YPICAL VENTILATOR CONNECTION © 2024 CWE, Inc. - Page 21 GEMINI O & CO Analyzer Instruction Manual 14: M IGURE ETABOLIC CHAMBER CONNECTIONS © 2024 CWE, Inc.
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