MODEL OM-25AE - ORSupply.com
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1. The MAXO2 analyzer can be used in applications where the relative humidity of the sample gas ranges from 0 to 95 non condensing However it should be noted that water vapor exerts its own pressure in the same manner as oxygen does in a sample gas stream For example if the analyzer is calibrated in dry gas and then the gas is humidified the analyzer will correctly display a reading which is slightly lower than previously displayed This is due to the dilution of oxygen in the sample gas by water vapor This fact is important to note in systems where there exist both wet and dry gas streams such as in a ventilator circuit If the analyzer is measuring oxygen on the dry side of the ventilator it will correctly indicate an oxygen concentration slightly greater than actually found in the wet side delivered to the patient The water vapor has diluted the gas 14 R213M10J qxd 8 14 2007 11 12 AM rase ds stream Additionally gas streams of high humidity may tend to condense on the sensor Condensation on the sensor may eventually affect performance For this reason it is recommended that the sensor be mounted in a vertical position facing downward to prevent condensate from flowing into the sensing surface 9 SPARE PARTS AND ACCESSORIES Part Number Item R125P03 002 MAX 250E Sensor R212P91 Battery Cover R103P16 Monitor Analyzer External Cable R212P17 Keypad R212P10 LCD Display R212P30 002 P2. LOW BAT icon displayed on LCD Sensor Type Maxtec MAX 250E galvanic fuel cell Expected Sensor Life gt 900 000 O2 Hours Over 2 years in typical applications Dimensions 3 5 W x 5 5 H x 1 5 D 89mm x 140mm x 38mm Weight approximately 92 lbs 417g Cable Length 10 ft 8m fully extended Diverter Fitting fits industry standard 15 mm T adapter 7 2 Sensor Specifications Type galvanic fuel sensor 0 100 Life 2 years in typical applications Interferent Volume Dry Interference in O2 Nitrous Oxide 75 lt 2 Carbon Dioxide 10 lt 2 Halothane 5 lt 2 Enflurane 5 lt 2 Isoflurane 5 lt 2 Helium 70 lt 2 Sevoflurane 6 lt 2 12 a R213M10J qxd 8 14 2007 11 12 AM rase Desflurane 15 lt 2 8 APPLICATIONS 8 1 Exposure to Anesthetic Gases Because of the unique chemistry of the oxygen sensors provided with the MAXO analyzer there are no ill effects when exposed to commonly used anesthetic gases however the analyzer is not designed for exposure to flamable gas mixtures See WARNING page i 8 2 Calibration Techniques in Pressurized Systems Similar to other oxygen sensors the Maxtec MAX series sensors measure the partial pressure of oxygen in a gas stream This is correlated to read percent oxygen on the MAXO2 analyzer It is important to note that the sensor output is directly proportional to the pressure of oxygen Thus one must take into consideration the effect of exposi
3. is best calibrated while mounted in the industry standard 15mm LD T adapter As in normal operation the oxygen sensor responds best when installed in a vertical position with the sensor facing down In addition calibration is recommended if the user is unsure when the last calibration procedure was performed or if the measurement value displayed is in question It is best to calibrate the MAXO analyzer to a known documented oxygen concentration at a pressure and flow similar to your clinical application Calibrating the MAXO 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 certificate and or USP certification Note Before beginning calibration the MAX 250E sensor must be in thermal equilibrium You may also need to be aware of other factors which affect device calibration values For more information refer to Factors Influencing Calibration section 2 2 4 in this manual 2 2 2 To Calibrate the MAXO Analyzer 1 Place the external probe in a stream of gas of known oxygen concentration Expose the sensor to the calibration gas at a regulated pressure and flow at a rate of 1 10 liters per minute 2 liters per minute is recommended 2 Using the ON OFF key make sure the unit i
4. patient s head or neck as such could result in strangulation Secure excess cable to the bed rail or suitable object Never use a MAXO analyzer with a cable that appears worn cracked or has damaged insulation Before use all individuals who will be using the MAXO2 must become thoroughly familiar with the information contained in this Operation Manual Strict adherance to the operating instructions is necessary for safe effective product performance This product will perform only as designed if installed and operated in accordance with the manufacturer s operating instructions Use only genuine Maxtec accessories and replacement parts Failure to do so may seriously impair the analyzer s performance Repair or alteration of the MAXO beyond the scope of the maintenance instructions or by anyone other than an authorized Maxtec service person could cause the product to fail to perform as designed Calibrate the MAXO weekly when in operation and if enviromental conditions change significantly ie Temperature Humidity Barometric Pressure Refer to Calibration section of this manual Use of the MAXO near devices that generate electrical fields may cause erratic readings If the MAXO is ever exposed to liquids from spills or immersion or to any other physical abuse turn the instrument OFF and then ON This will allow the unit to go through its self test and make sure everything is operating correctly Never autoclave im
5. typical usage For extra long life 2 AA lithium batteries may be used e Durable compact case that permits comfortable hand held operation e Large easy to read 3 1 2 digit LCD display for readings in the 0 100 range Simple operation and calibration using quick calibrate key functions e Self diagnostic check of analog and microprocessor circuitry e Low battery indication R213M10J qxd 8 14 2007 11 12 AM i G OO Components Description please refer to page 3 LCD Readout 3 1 2 Digit Display The 3 1 2 digit liquid crystal display LCD 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 when the keypad settings are locked When the keypad settings are unlocked the sign is not visible In the calibration mode the sign flashes every second Low Battery Indicator The low battery indicator appears on the LCD display when the power supply voltage drops below acceptable limits When the LOW BAT icon is visible batteries should be replaced immediately Keypad ON OFF Key after Calibration This key is used to turn the instrument on or off When batteries are installed in the unit and the unit is in the power off mode the display will be blank When the ON OFF key is pressed once the unit will start to display the oxygen concentration and the keypa
6. CBA Board Accessories R106P15 Concentrator Adapter for Sensor Probe R205P86 Monitor Analyzer Wall Mount Bracket R206P75 Monitor Analyzer Pole Mount Clamp R213P02 Monitor Analyzer Protective Carrying Case R213P31 Swival Mount Stand RP16P02 T Adapter 15 mm 1 D RP16P10 T Oxygen Sensor Activator System R213M10 OM 25AE Operating Instructions R213M66 Technical Service Manual Although normal usage will not require repair Maxtec will make available on request diagrams descriptions and instructions to assist user s appropriately qualified technical personnel in repairing and replacing broken or worn components 15 R213M10J qxd 8 14 2007 11 12 AM aes 9 WARRANTY The MAXO2 Analyzer is designed for medical oxygen delivery equipment and systems Under normal operating conditions Maxtec warrants the MAXO29 Analyzer to be free from defects of workmanship or materials for a period of two 2 years from the date of shipment from Maxtec provided that the unit is properly operated and maintained in accordance with Maxtec s operating instructions Based on Maxtec s product evaluation Maxtec s sole obligation under the foregoing warranty is limited to making replacements repairs or issuing credit for equipment found to be defective This warranty extends only to the buyer purchasing the equipment directly from Maxtec or through Maxtec s designated distributors and agents as new equipment Maxtec warrants the MAX 250E ox
7. ENSOR REMOVAL AND REPLACEMENT The OM 25AE is shipped with a new MAX 250E oxygen sensor installed Although the sensor has a very long expected life eventually the sensor will require replacement Removing or installing a sensor when necessary is a very simple procedure To remove and install a new sensor 1 Grasp the sensor in one hand and with the other hand unscrew the cable connector counter clockwise at the sensor 2 Pull out the cable connector plug from the expired sensor 3 Unscrew the flow diverter from the sensor and discard the expired sensor 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 packaging and remove the protective film from the sensor face 5 Insert the cable connector plug into the receptacle of the new sensor and tighten the cable connector 6 Screw the flow diverter onto the new sensor 7 Calibrate the new sensor Note If the analyzer is on when the sensor is detached and replaced the analyzer will automatically force a re calibration The display will read CAL 10 R213M10J qxd 8 14 2007 11 12 AM i 5 PROBLEM SOLVING e If the LOW BAT icon is displayed on the LCD readout at any time the batteries should be replaced as quickly as possible e When the unit is in the power on mode and the LCD displays 000 the sensor is not conn
8. M10J qxd 8 14 2007 11 12 AM Page MAXO vz 2 ANALYZER MODEL OM 25AE RE USER S GUIDE H AND F OPERATING __ INSTRUCTIONS R213M10 Rev J manufactured by o AU maxtec amp R213M10J qxd 8 14 2007 11 12 AM i Manufacturer Maxtec Inc CE European Representative Airox S A Parcd activities Pau Pyrenees L echangeur BP833 64008 PAU Cedex France R213M10J qxd 8 14 2007 11 12 AM i PREFACE This manual describes the function operation and maintenance of the Maxtec Model OM 25AE hand held oxygen analyzer A member of Maxtec s line of oxygen analyzers and monitors the OM 25AE utilizes the Maxtec MAX 250E oxygen sensor and is engineered for fast response maximum reliability and stable performance The OM 25AE is designed primarily for measuring the oxygen concentration supplied from medical oxygen delivery equipment and respiratory care systems lts external probe and sensor are compatible with industry standard 15 millimeter 1 D T adapters found on most oxygen ventilators and oxygen delivery equipment The probe is also adaptable to a variety of other sampling configurations THANK YOU Thank you for your purchase of a Maxtec MAXO oxygen analyzer We appreciate the time and energy you invest in selecting the equipment best suited to your needs As repayment we are supplying you with a reliable high quality instrument that with proper care and operation will provide you with years of exc
9. bration or operation above this pressure is beyond the intended use Humidity Effect Humidity has no effect on the performance of the MAXO 8 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 and slower response time For this reason the following is recommended 1 Avoid usage in environments greater than 95 relative humidity 2 When usedin a breathing circuit place the sensor upstream of the humidifier 3 OPERATION INSTRUCTIONS To check the oxygen concentration of a sample gas after the unit has been calibrated 1 Placethe external probe in the sample gas stream When using a standard T adapter make sure the sensor is mounted in the adapter with the flow diverter pointing downward This will prevent moisture 9 R213M10J qxd 8 14 2007 11 12 AM rase from draining to the sensor Note It is important that a tight fit exists between the probe and the T adapter 2 Initiate flow of the sample gas to the sensor 3 Using the ON OFF key make sure the unit is in the power on mode 4 Allow the oxygen reading to stabilize This will normally take about 30 seconds or more 4 S
10. d is activated If the ON OFF key is pressed again the unit reverts to the power off mode LOCK UNLOCK Key The presence of the sign on lt the LCD readout is an indication that the unit is in its normal LOCKED state The unit must be unlocked in order to be calibrated Pressing the LOCK key will unlock the keypad and cause the sign to disappear The unit can then be calibrated if desired If no other keys are pressed within 10 seconds the sign will reappear and the unit will revert to the LOCKED mode V CALIBRATE Key The Unit will force you to Calibrate the first time power is applied or the sensor is changed This is indicated on the LCD by the word CAL Pressing the CALIBRATE key will allow the T and J arrow keys to calibrate the unit Also when the keypad is unlocked the CALIBRATE key is used in conjunction with the T and J arrow keys to calibrate the unit When the CALIBRATE key is pressed CAL appears on the LCD readout for 1 second and then the measured calibration concentration is displayed The calibration value can then be R213M10J qxd 8 14 2007 11 12 AM i LCD Readout o External Probe OM 25AE R213M10J qxd 8 14 2007 11 12 AM i changed using the T and Y 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 n
11. ected properly Check the sensor connection and if the condition persists contact Maxtec Customer Service e If at any time ErX i e Eri Er4 etc appears on the LCD readout contact Maxtec Customer Service 6 CLEANING AND MAINTENANCE e When cleaning or disinfecting the MAXO analyzer take appropriate care to prevent any solution from entering the instrument The MAXO 2 analyzer s surface may be cleaned using a mild detergent and a moist cloth The MAXO 2 analyzer may be disinfected using standard topical disinfectants The MAXO analyzer is not intended for steam ethylene oxide or radiation sterilization Store the MAXO2 analyzer in a temperature similar to its ambient environment of daily use 11 R213M10J qxd 8 14 2007 11 12 AM rase 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 RH 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 230C Warm up Time none required Operating Temperature 150C 40 C 590F 104 F Storage Temperature 150C 500C 5 F 1220F Humidity 0 95 non condensing Power Requirements 2 AA Alkaline batteries 2 x 1 5 Volts Battery Life approximately 3000 hours in typical use Low Battery Indication
12. eptional service We also encourage your comments or suggestions as to how our equipment in any way can better serve your needs Please feel free to write FAX or email us at the address on the back of this manual c o the Maxtec Marketing Department NOTE In order to obtain optimum performance from your MAXO analyzer all operation and maintenance must be performed in accordance with this manual Please read the manual thoroughly before using the analyzer and do not attempt any repair or procedure that is not described herein Maxtec cannot warrant any damage resulting from misuse unauthorized repair or improper maintenance of the instrument N WARNING The sensor of the MAXO2 Oxygen Analyzer MAXOz has been tested with various anesthesia gases including Nitrous oxide Halothane Isoflurane Enflurane Sevoflurane and Desflurane and found to have acceptable low interferance the device in its entirety including electronics is not suitable for use in the presense of a flammable anesthetic mixture Only the threaded sensor face flow diverter and T adapter may be allowed to contact such a gas mixture R213M10J qxd 8 14 2007 11 12 AM rase 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 of cable near the
13. he instrument case 2 Install the two AA alkaline batteries 2 x 1 5 Volts in the unit observing the orientation shown on the label inside the compartment 3 Slide the battery compartment cover back onto the case Make sure the tabs on the cover snap into position securing the cover flush against the case When batteries are installed in the MAXO2 analyzer the unit initiates a self diagnostic test All segments of the LCD readout are turned on for approximately 2 seconds When the diagnostic test is completed successfully the word CAL will appear on the display indicating that the unit is ready for calibration 2 2 Calibrating the MAXO Analyzer 2 2 1 Before You Begin A protective film covering the threaded sensor face must be removed wait approximately 20 minutes for the sensor to reach equilibrium Next the MAXO gt Oxygen Analyzer should be calibrated Thereafter Maxtec recommends calibration on a weekly basis However more frequent calibration will not adversely affect product performance R213M10J qxd 8 14 2007 11 12 AM i More frequent calibration is required when e The temperature of the gas stream changes by more than 3 degrees Celsius Changes in elevation result in calibration error of approximately 1 of reading per 250 feet In general calibration of the instrument should be performed when the geographic elevation at which the product is being used changes by more than 500 feet The sensor
14. merse or expose the MAXO including sensor to high temperatures gt 70 C Never expose the device to pressure irradiation vacuum steam or chemicals To protect the unit from potential leaky battery damage always remove batteries when the unit is going to be stored not in use for 1 month and replace dead batteries with recognized name brand AA Alkaline batteries R213M10J qxd 8 14 2007 11 12 AM i Do not throw away Dispose of properly in accordance with local x regulations 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 R213M10J qxd 8 14 2007 11 12 AM i TABLE OF CONTENTS 1 SYSTEM OVERVIEW Lucini 1 1 1 Base Unit Description 1 1 2 Components Description 2 1 3 MAX 250E Oxygen Sensor 4 2 SET UP PROCEDURE iminente oiro saint 5 2 1 Battery Installation n 5 2 2 Calibrating The MAXO Analyzer 5 2 2 1 Before You Begin 5 2 2 2 To Calibrate The MAXO Analyzer 6 2 2 3 Automatic Calibration To R
15. ng the sensor to various gas sample pressures For example if an analyzer is calibrated to read 20 9 in ambient air atmospheric pressure and then exposed to a pressurized gas sample containing a known concentration of oxygen the analyzer will display a reading greater than the actual oxygen percentage This is because the analyzer was originally calibrated at atmospheric pressure 0 psig then exposed to a higher pressure sample eg 5 psig The greater the difference in pressure the greater the difference in sensor signal oxygen reading on the analyzer By the same token if an analyzer is calibrated on a pressurized gas sample containing a known concentration of oxygen and then exposed to ambient air atmospheric pressure the analyzer will display a reading less than the actual oxygen percentage To avoid confusion the analyzer can be calibrated at a single point ona gas stream similar to the application If for example the purpose of the analyzer is to measure oxygen in a concentrator or anesthesia application the optimal results may be attained by calibrating the instrument on a gas of similar concentration and pressure This would typically be done by connecting to a cylinder of a known high concentration of oxygen calibration gas and adjusting the flow and pressure to match the application before calibrating the instrument 13 R213M10J qxd 8 14 2007 11 12 AM rase 8 3 Calibration Errors The MAXO analyzer ha
16. on and read correctly within 3 when in thermal equilibrium within the operating temperature range The device must be thermally stable when calibrated and allowed to thermally stabilize after experiencing temperature changes before readings are accurate For these reasons the following is recommended 1 Allow adequate time for the sensor to equilibrate to a new ambient temperature 2 Whenusedin a breathing circuit place the sensor upstream of the heater 3 For best results perform the calibration procedure at a temperature close to the temperature where analysis will occur R213M10J qxd 8 14 2007 11 12 AM rase Pressure Effect Readings from the MAXO analyzer are proportional to the partial pressure of oxygen The partial pressure of Oxygen PO is equal to the percentage of oxygen 02 times the absolute pressure AP at which the sample enviroment is measured PO2 02 x AP Thus the readings are proportional to the concentration if the pressure is held constant Flow rate of sample gas can affect pressure at the sensor in that back pressure at the sensing point may change For these reasons the following is recommended 1 Calibrate the MAXO2 analyzer at the same pressure as the sample gas 2 If sample gases flow through tubing use the same apparatus and flow rates when calibrating as when measuring 3 The MAXO analyzer oxygen sensor has been validated at pressures up to 2 atmospheres absolute Cali
17. oom Air 8 2 2 4 Factors Influencing Calibration 8 3 OPERATION INSTRUCTIONS 9 4 SENSOR REMOVAL AND REPLACEMENT 10 5 PROBLEM SOLVING urina 11 6 CLEANING AND MAINTENANCE 11 7 SPECIFICATIONS _ ssssssssccssssssssssersessssssnseeessseess 12 7 1 Base Unit Specifications 12 7 2 Sensor Specifications _ 12 8 APPLICATIONS 13 8 1 Exposure to Anesthetic Gases 13 8 2 Calibration Techniques in Pressurized SYSTEMS au aie 13 8 3 Calibration Errors o 14 8 4 Atmospheres of High Humidity 14 9 SPARE PARTS AND ACCESSORIES 15 10 WARRANTY ria 16 v R213M10J qxd 8 14 2007 11 12 AM i 1 SYSTEM OVERVIEW 1 1 Base Unit Description The MAXO29 analyzer Model OM 25AE provides unparalleled performance and reliability due to an advanced design that includes the following features and operational benefits e Fast responding oxygen specific galvanic sensor that achieves 90 of final value in approximately 15 seconds at room temperature e Extra life oxygen sensor of approximately 900 000 O2 percent hours minimum 2 years in most normal applications e External probe with 10 ft extendible cable and diverter fitting for standard 15 mm T adapter e Operation using only 2 AA alkaline batteries 2 X 1 5 Volts or approximately 3000 hours of performance in
18. ormal operation The unit will also revert to normal operation if 10 seconds elapse and no keys are pressed 7 Y ranas Keys The T and J arrow keys are used in conjunction with the CALIBRATE key to calibrate the unit Pressing the T or J key will raise or lower the displayed value in 1 increments When either of these keys are held down for more than 1 second the display will scroll at a rate of 4 per second External Probe 8 Sensor with Diverter The sensor with diverter is designed to fit industry standard 15 mm LD T adapters Extendible Cable The extendible cable allows the sensor to be positioned up to 10 feet from the base unit 1 3 MAX 250E Oxygen Sensor MAX 250E oxygen sensors offer quick response stability and extra life on the order of 900 000 percent hours The MAX 250E is a galvanic partial pressure sensor that is specific to oxygen It consists of two electrodes a cathode and an anode a teflon membrane and an electrolyte Oxygen diffuses through the teflon membrane and immediately reacts electrochemically at the gold cathode Concurrently oxidation occurs electrochemically at the lead anode generating an electrical current and providing a voltage output Electrodes are immersed in a unique gelled weak acid electrolyte which is responsible for the sensors long life and motion insensitive characteristic Since the sensor is specific to oxygen the current generated is proportional to the amount of ox
19. s in the power on mode 3 Allow the oxygen reading to stabilize This will normally take about 30 seconds or more R213M10J qxd 8 14 2007 11 12 AM i 4 Press the LOCK UNLOCK key to unlock the keypad The UL will appear on the display for about 1 second and then the sign will disappear for the display 5 Press the CALIBRATE key on the keypad The word CAL will appear on the display for about 1 second and then the sign will start to flash 6 Use the 7 and J arrow keys to adjust the displayed oxygen concentration to the level of the known concentration Pressing the arrow keys changes the value in 1 increments If the keys are held down for more than 1 second the display will scroll at a rate of 4 per second Note If 10 seconds elapse between key actuations the system will store the latest calibration value and will revert to normal operation If this occurs inadvertently simply repeat the calibration procedure 7 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 inadvertently entered the wrong concentration for
20. the calibration gas b the concentration of the calibration gas is not correct C the sensor is in need of replacement d the operator attempted to adjust the analyzer before allowing sufficient time for the calibration gas to purge out the previous sample e the flow and pressure of the calibration gas was not properly regulated Check these items and repeat calibration If calibration error continues to occur contact the service department of the distributor from which the unit was purchased or you may call Maxtec s Customer Service Department directly R213M10J qxd 8 14 2007 11 12 AM rase 2 2 3 Automatic Calibration to Room Air The MAXO29 analyzer can quickly be calibrated to room air 20 9 using a quick key shortcut command This function saves time by setting the calibration value to 20 9 without scrolling the display To use this function 1 Place the external probe in room air 2 Press the LOCK UNLOCK key to unlock the keypad 3 Press and hold down the CALIBRATE key When the sign starts to flash press the arrow key to set the calibration value to 20 9 4 Release both the CALIBRATE key and the J key The unit will automatically enter the LOCKED condition and return to normal operation 2 2 4 Factors Influencing Calibration The primary factors influencing the MAXO analyzer are temperature pressure and humidity Effects of Temperature The MAXO2 analyzer will hold calibrati
21. ve 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 errors If you try to adjust the analyzer display before the reading has stabilized the CAL Er may appear For example if the analyzer had just been calibrated on a known high concentration of oxygen source gas and then exposed to ambient air you should wait until the reading has stabilized If you try to adjust the display to read 20 9 before the sample line has cleared of high concentration Oz the sensor may actually be exposed to residual high oxygen The signal from the sensor would still be high and considered out of spec for air thus resulting in a CAL Er The proper procedure is to wait for the reading to stabilize before adjusting the display This may take 30 seconds or more Externally mounted sensors as found on the OM25 AE and OM25 ME come equipped with diverter tips The tips help direct the gas in a T fitting up to the sensor for analysis The diverter tips should only be used with a flowing gas When calibrating in a non flowing environment remove the diverter tip 8 4 Atmospheres of High Humidity
22. ygen present in the sample gas When no oxygen is present there is no electrochemical reaction and therefore negligible current is produced In this sense the sensor is self zeroing CAUTION The Maxtec MAX 250E oxygen sensor is a N sealed device containing a mild acid electrolyte lead Pb and lead acetate Lead and lead acetate are hazardous waste constituents and should be disposed of properly or returned to Maxtec for proper disposal or recovery R213M10J qxd 8 14 2007 11 12 AM ec CAUTION Do not use ethylene oxide sterilization Do not immerse the sensor in any cleaning solution autoclave or expose the sensor to high temperatures CAUTION Dropping or severely jarring the sensor after calibration may shift the calibration point enough to require recalibration CAUTION The flow diverter for the sensor is for use with flowing gases only Do not use the diverter when performing static sampling such as in incubators oxygen tents oxygen hoods etc Do not throw away Dispose of properly in accordance with local regulations x bbb 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 t
23. ygen sensor in the MAXO2 Analyzer to be free from defects in material and workmanship for a period of two 2 years from Maxtec s date of shipment in a MAXO unit Should a sensor fail prematurely the replacement sensor is warranted for the remainder of the original sensor warranty period Routine maintenance items such as batteries are excluded from warranty Maxtec and any other subsidiaries shall not be liable to the purchaser or other persons for incidental or consequential damages or equipment that has been subject to abuse misuse mis application alteration negligence or accident THESE WARRANTIES ARE EXCLUSIVE AND IN LIEU OF ALL OTHER WARRANTIES EXPRESSED OR IMPLIED INCLUDING WARRANTY OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 16 R213M10J qxd 8 14 2007 11 12 AM i R213M10J qxd 8 14 2007 11 12 AM rase o maxtec Maxtec Inc 6526 South Cottonwood Street Salt Lake City UT 84107 General Tel 801 266 5300 Toll Free Dial 800 748 5355 FAX 801 270 5590 Home Page http www maxtecinc com email sales maxtecinc com
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