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R213M15K.qxd 6/26/2006 8:59 AM Page 1
®
OXYGEN
ANALYZER
MODEL
OM-25A
USER’S GUIDE
AND
OPERATING
INSTRUCTIONS
R213M15 Rev. K
manufactured by:
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R213M15K.qxd 6/26/2006 8:59 AM Page 2 Manufacturer: Maxtec, Inc European Representative Airox S.A. Parcd’activities Pau-Pyrenees L’echangeur BP833 64008 PAU Cedex France
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R213M15K.qxd 6/26/2006 8:59 AM Page i PREFACE This manual describes the function, operation and maintenance of the Maxtec Model OM-25A hand-held oxygen analyzer. A member of Maxtec's MAXO2 analyzer line of oxygen analyzers and monitors, the OM-25A utilizes the MAX-250 oxygen sensor and is engineered for fast response, maximum reliability and stable performance. The OM-25A is designed primarily for spot-checking oxygen concentration delivered by oxygen concentrator units, however, its intern
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R213M15K.qxd 6/26/2006 8:59 AM Page ii To avoid explosion, do not operate the oxygen analyzer in the presence of flammable anesthetics or in an atmosphere of explosive gases. Operating the oxygen analyzer in flammable or explosive atmospheres may result in fire or explosion. Never allow an excess length tubing near the patient’s head or neck, as such could result in strangulation. Before use, all individuals who will be using the MAXO2 must become thoroughly familiar with the information con
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R213M15K.qxd 6/26/2006 8:59 AM Page 1 Classification: Protection against electric shock: Internally powered equipment. Protection against water: Ordinary equipment Mode of Operation: Continuous Sterilization: See section 6 Safety of application in the presensence of a flammable anesthetic mixture: See section 8.1 FAILURE TO COMPLY WITH THESE WARNINGS AND CAUTIONS COULD RESULT IN INSTRUMENT DAMAGE AND POSSIBLY JEOPARDIZE THE WELL BEING OF THE PATIENT AND/OR HEALTH CARE PROFESSIONAL. iii
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R213M15K.qxd 6/26/2006 8:59 AM Page 2 TABLE OF CONTENTS 1. SYSTEM OVERVIEW ............................................. 1 1.1 Base Unit Description ................................ 1 1.2 Components Description ......................... 2 1.3 MAX-250 Oxygen Sensor ............................. 4 2. SET-UP PROCEDURE ......................................... 5 2.1 Battery Installation ..................................... 5 2.2 Calibrating The MAXO2 Analyzer ........... 5 2.2.1 Be
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R213M15K.qxd 6/26/2006 8:59 AM Page 3 1. SYSTEM OVERVIEW 1.1 Base Unit Description The MAXO2 analyzer (Model OM-25A) provides unparalleled performance and reliability, due to an advanced design that includes the following features and operational benefits. • Fast-responding, oxygen-specific, galvanic sensor that achieves 90% of final value in approximately 15 seconds at room temperature. • Extra-life oxygen sensor of approximately 900,000 O2 percent hours (minimum 2 years in most normal
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R213M15K.qxd 6/26/2006 8:59 AM Page 4 1.2 Components Description (please refer to page 3) CD Readout A 1 1 3 /2-Digit Display- The 3 /2-digit liquid crystal display (LCD) 1 provides direct readout of oxygen concentrations in the range of 0-100%. It also displays "CAL" when the calibration mode is entered. "%" Sign- The "%" sign is present during normal operation 2 when the keypad settings are locked. When the keypad settings are unlocked, the "%" sign is not visible. In the calibration m
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R213M15K.qxd 6/26/2006 8:59 AM Page 5 LCD Readout A 1 2 3 7 5 4 6 Keypad B Sample Inlet C Connection OM-25A 3
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R213M15K.qxd 6/26/2006 8:59 AM Page 6 changed using the ↑ and ↓ arrow keys. During calibration, the "%" sign will flash at a once per second rate. When the calibration value is set, pressing the CALIBRATE or LOCK/UNLOCK key will cause the unit to exit the calibration mode and return to normal operation. The unit will also revert to normal operation if 10 seconds elapse and no keys are pressed. 7 ↑ ↑ and ↓ ↓ Keys- The ↑ and ↓ arrow keys are used in conjunction with the CALIBRATE key to c
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R213M15K.qxd 6/26/2006 8:59 AM Page 7 2. SET-UP PROCEDURE 2.1 Battery Installation All MAXO2 analyzer units are powered by two, AA alkaline batteries (2 x 1.5 Volts) and are shipped without the batteries installed. The battery compartment is accessible from the back side of the unit. To install the batteries: 1) With the thumb, press down on the center of the battery compartment cover and slide the cover off of the instrument case. 2) Install the two, AA, alkaline batteries (2 x 1.5 Vol
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R213M15K.qxd 6/26/2006 8:59 AM Page 8 It is best to calibrate the MAXO2 analyzer to a known documented oxygen concentration at a pressure and flow similar to your clinical application. Calibrating the MAXO2 analyzer at lower concentrations with a known oxygen value is also acceptable and may provide additional accuracy if the calibration gas is closer to the environment in which the MAXO2 analyzer will be used. A “known” value of oxygen is defined as an oxygen source which has a traceable cer
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R213M15K.qxd 6/26/2006 8:59 AM Page 9 8) When the calibration value is set, press the CALIBRATE or LOCK/UNLOCK key again to accept the calibration setting and return to normal operation. Note: If the message "CAL", followed by the message "Er" flashes on the display after entering the desired calibration value, the system has determined that the entered value will not allow operation within the specified output range of the sensor. This situation may occur if: a) the operator has inadve
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R213M15K.qxd 6/26/2006 8:59 AM Page 10 4) Release both the CALIBRATE key and the ↓ key. The unit will automatically enter the “LOCKED” condition and return to normal operation. 2.2.4 Factors Influencing Calibration 2 The primary factors influencing the MAXO analyzer are temperature, pressure, and humidity. Effects of Temperature The MAXO2 analyzer will hold calibration and read correctly within ±3% when in thermal equilibrium within the operating temperature range. The device must be the
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R213M15K.qxd 6/26/2006 8:59 AM Page 11 Humidity Effect Humidity has no effect on the performance of the MAXO2 analyzer other than diluting the gas, as long as there is no condensation. Depending on the humidity, the gas may be diluted by as much as 4%, which proportionally reduces the oxygen concentration from the dry concentration. Environments where condensation may occur are to be avoided since condensate may obstruct passage of gas to the sensing surface, resulting in erroneous readings a
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R213M15K.qxd 6/26/2006 8:59 AM Page 12 3) Remove the expired sensor from the sensor compartment and carefully pull apart the small white connector that connects the black and red sensor wires to the analog input wiring. NOTE: The sensor contains lead and lead acetate, be sure to dispose of expired sensors in accordance with hospital, local, state and federal regulations. 4) Remove the new sensor from the package and remove the protective film from the sensor face. 5) Attach the new MAX-
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R213M15K.qxd 6/26/2006 8:59 AM Page 13 5. PROBLEM SOLVING • If the "LOW BAT" icon is displayed on the LCD readout at any time, the batteries should be replaced as soon as possible. • When the unit is in the power on mode and the LCD displays "000%," the sensor is not connected properly. Check the sensor connection and if the condition persists, contact the Maxtec Customer Service. • If, at any time, "ErX" (i.e. Er1, Er4, etc.) appears on the LCD readout, contact the Maxtec Customer
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R213M15K.qxd 6/26/2006 8:59 AM Page 14 7. SPECIFICATIONS 7.1 Base Unit Specifications Measurement Range: 0.0-100% Resolution: 0.1% Accuracy and Linearity: ±1% of full scale at constant temperature, R.H. and pressure when calibrated at full scale. Total Accuracy: ±3% Actual Oxygen Level over full operating temperature range. Response Time: 90% of final value in approximately 15 seconds at 23 C. Warm-up Time: none required Operating Temperature: 15 C - 40 C (59 F - 104 F) Storage Temper
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R213M15K.qxd 6/26/2006 8:59 AM Page 15 8. APPLICATIONS 8.1 Exposure to Anesthetic Gases Because of the unique chemistry of the oxygen sensors provided with the MAXO2 analyzer, there are no significant effects when exposed to commonly used anesthetic gases, however, the analyzer is not designed for exposure to flammable gas mixtures. (See WARNING page i) 8.2 Calibration Techniques in Pressurized Systems Similar to other oxygen sensors, the MAX series sensors measure the partial pressure
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R213M15K.qxd 6/26/2006 8:59 AM Page 16 8.3 Calibration Errors The MAXO2 analyzers have a self test feature built into the software to detect faulty calibrations. During calibration, if the signal from the oxygen sensor is outside the limits stored within the instrument’s memory, a flashing “CAL Er” is displayed. The error code is displayed to indicate that either the sensor should be replaced or that there is a fault in the calibration process. A few simple hints can prevent calibration
