MaxTech OM-25ME manual

OXYGEN MONIT OR MODEL OM-25ME (OM-25ME-L) USER’S GUIDE AND OPERA TING INSTRUCTIONS manufactured by: R213M05 Rev . H ® ® R213M05H.qxd 6/26/2006 9:04 AM Page 1[...]

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i Manufacturer: Maxtec, Inc European Representative Airox S.A. Parcd’activities Pau-Pyrenees L ’echangeur BP833 64008 P AU Cedex France R213M05H.qxd 6/26/2006 9:04 AM Page i[...]

ii PREF ACE This manual describes the function, operation and maintenance of the Maxtec Model OM-25ME and OM-25ME-L oxygen monitors. Notes are included where differences may occur between the two monitors. As members of Maxtec's MAXO 2  line of oxygen analyzers and monitors, the OM-25ME utilizes the Maxtec MAX-250E oxygen sensor and is engi[...]

iii T o avoid explosion, do not operate the Oxygen monitor in the presence of flammable anesthetics or in an atmosphere of explosive gases. Operating the oxygen monitor in flammable or explosive atmospheres may result in fire or explosion. Never allow an excess length of cable near the patient’ s head or neck, as such could result in strangulatio[...]

iv The OM-25ME-L™ oxygen monitor has been manufactured with a low alarm setting adjustable down to 15% This change is within the guidelines set forth in ASTM S pecification F1462-93. The OM-25ME-L™ is labeled to indicate this feature. Classification: Protection against electric shock: Internally powered equipment. Protection against water: Ordi[...]

v T ABLE OF CONTENTS 1. SYSTEM OVERVIEW ........................................... 1 1.1 Base Unit Description .............................. 1 1.2 Component s Description ........................ 2 1.3 MAX-250E Oxygen Sensor .......................... 6 2. SET -UP PROCEDURE ......................................... 7 2.1 Battery Inst allation ...[...]

1. SYSTEM OVERVIEW 1.1 Base Unit Description The MAXO 2  (Model OM-25ME) 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 temperatur[...]

2 1.2 Component s Description (please refer to p age 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- In the calibration mode, the "%" sig[...]

LCD Readout Alarm LEDs Keyp ad External Probe A C B D 1 2 3 10 12 4 13 15 16 14 6 17 18 8 OM-25ME 11 9 5 7 3 R213M05H.qxd 6/26/2006 9:04 AM Page 2[...]

4 Alarm LEDs Low Alarm LED- In a low alarm condition, the red "LOW ALARM" LED will flash each second, accompanied by the alarm beeper . High Alarm LED- In a high alarm condition, the red "HIGH ALARM" LED will flash each second, accompanied by the alarm beeper . Keyp ad ON/OFF Key- (after Calibration) This key is used to turn the[...]

D 13 14 15 16 17 18 ↑ ↑ and ↓ ↓ Keys- The ↑ and ↓ arrow keys are used in conjunction with the CALIBRA TE key to calibrate the unit or in conjunction with the LOW SET and HIGH SET keys to adjust the alarm settings. When used after pressing the CALIBRA TE key , pressing the ↑ or ↓ key will raise or lower the displayed oxygen value in [...]

6 CAUTION: The Maxtec MAX-250E oxygen sensor is a sealed device cont aining a mild acid electrolyte, lead (Pb), and lead acet ate. Lead and lead acetate are hazardous waste constituent s and should be disposed of properly , or returned to Maxtec for proper disposal or recovery . CAUTION: Do not use ethylene oxide for sterilization. Do not immerse t[...]

2. SET -UP PROCEDURE 2.1 Battery Inst allation All MAXO 2  units are powered by two, AA, alkaline batteries (2 x 1.5 V olts) and are shipped without the batteries installed. The battery compartment is accessible from the back side of the unit. T o install the batteries: 1) With the thumb, press down on the center of the battery compartment cover[...]

8 be performed when the geographic elevation at which the product is being used changes by more than 500 feet. The sensor is best calibrated while mounted in the industry standard, 15mm I.D. “T” adapter . As in normal operation, the oxygen sensor responds best when installed in a vertical position with the sensor facing down. In addition, calib[...]

6) Use the ↑ and ↓ 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 elap se between key actuations, the system will[...]

10 T o use this function: 1) Place the external probe in room air . 2) Press the LOCKUNLOCK key to unlock the keypad. 3) Press and hold down the CALIBRA TE key . When the "%" sign start s to flash, press the ↓ arrow key to set the calibration value to 20.9%. 4) Release both the CALIBRA TE key and the ↓ key . The unit will automatical[...]

Pressure Effect Readings from the MAXO 2  Monitor are proportional to the partial pressure of oxygen. The p artial pressure of Oxygen (PO 2 ) is equal to the percentage of oxygen (%O 2 ) times the absolute pressure (AP) at which the sample enviroment is measured. (PO 2 =%O 2 x AP). Thus the readings are proportional to the concentration if the p[...]

12 3. OPERA TING INSTRUCTIONS 3.1 Alarm Setting Procedure 3.1.1 Low Alarm Setting T o adjust the low alarm setting: 1) Press the LOCK/UNLOCK key to unlock the keypad. 2) Press the LOW SET key . The "LOW" icon will start to flash. 3) Use the ↑ and ↓ arrow keys to set the low alarm to the desired value. Pressing the arrow keys changes t[...]

The high alarm value cannot be set closer than 1% from the low alarm value due to ASTM specifications. For example, if the low alarm is set at 50%, the system will not accept a high alarm setting less than 51%. Setting the high alarm to 100% turns off or deactivates the high alarm. 4) When the high alarm value is set, press the HIGH SET key again t[...]

14 4. SENSOR REMOV AL AND REPLACEMENT The OM-25ME 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. T o remove and install a new sensor: 1) Grasp the sensor in one ha[...]

5. PROBLEM SOL VING • If the "LOW BA T" icon is displayed on the LCD readout at any time, the batteries should be replaced as quickly as possible. • When the unit is in the power on mode and the LCD displays "000%," the sensor is not connected properly . The "A TT ACH SENSOR" icon will also appear on the display . [...]

16 7. SPECIFICA TIONS 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. T otal Accuracy: ±3% Actual Oxygen Level over full operating temperature range. Response T ime: 90% of final value in approximately 15 s[...]

8. APPLICA TIONS 8.1 Exposure to Anesthetic Gases Because of the unique chemistry of the oxygen sensors provided with the MAXO 2  Monitor , there are no significant effects when exposed to commonly used anesthetic gases, however , the monitor is not designed for exposure to flammable gas mixtures. (See W ARNING page i) 8.2 Calibration T echnique[...]

18 8.3 Calibration Errors The MAXO 2  Monitors 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 limit s stored within the instrument’s memory , a flashing “CAL Er” is displayed. The error code is displayed to indicate that either the sens[...]

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 onto the sensing surface. 19 R213M05H.qxd 6/26/2006 9:04 AM Page 18[...]

20 9. SP ARE P ARTS AND ACCESSORIES Part Number Item R12503-002 MAX-250E Sensor R212P91 Battery Cover R103P16 Monitor/Analyzer External Cable R212P17 Keypad R212P10 LCD Display R212P30-001 PCBA Board Accessories R106P15 Concentrator Adapter for Sensor Probe R205P86 Monitor/Analyzer W all Mount Bracket R206P75 Monitor/Analyzer Pole Mount Clamp R213P[...]

10. W ARRANTY The MAXO 2  Monitor is designed for medical oxygen delivery equipment and systems. Under normal operating conditions, Maxtec warrants the MAXO 2  Monitor 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 maintai[...]

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Maxtec, Inc. 6526 South Cottonwood S treet Salt Lake City , UT 84107 General T el: 801-266-5300 T oll Free Dial: 800-748-5355 F AX: 801-270-5590 Home Page: http://www .maxtecinc.com email: sales@maxtecinc.com R213M05H.qxd 6/26/2006 9:04 AM Page 22[...]