Portable Oxygen Monitor OPERATING & SERVICE INSTRUCTIONS FOR MX300 PORTABLE OXYGEN MONITOR P/N M75387 ECO 03-0166 REV 0 TYPE B EQUIPMENT: Equipment providing a particular degree of protection against electric shock, particularly regarding— • Allowable LEAKAGE CURRENT • Reliability of the protective earth connection (if present).
MX300 Copyright © 2003 Teledyne Analytical Instruments All Rights Reserved No part of this manual may be reproduced, transmitted, transcribed, stored in a retrieval system, or translated into any other language or computer language in whole or in part, in any form or by any means, whether it be electronic, mechanical, optical, manual, or otherwise, without prior written consent of Teledyne Instruments, Analytical Instruments, 16830 Chestnut Street, City of Industry, CA 91749-1580 FCC Statement This equipm
Portable Oxygen Monitor About This Manual The MX300 Operator's Manual provides both introductory and detailed information for configuring and operating these instruments. The manual takes you from the time you unpack the instrument until you complete the first gas analysis. The bulk of the manual contains operating procedures and information. There are also cautions, warnings, and guidelines to ensure that your monitor operates normally and to its full potential.
MX300 Safety Messages Your safety and the safety of others are very important. Please carefully read the following safety messages. Safety message are indented to alert the user of potential hazards. Each safety message is associated with a safety alert symbol. These symbols are found in the manual and on the instrument. The definition of these symbols is described below: CAUTION: Refer to the instructions for details on the specific danger.
Portable Oxygen Monitor Table of Contents Safety Messages .......................................................................... iv List of Figures.............................................................................. vii List of Tables .............................................................................. viii Introduction ................................................................................... 9 1.1 Applicable Standards 10 1.2 Features 11 1.3 Options 11 1.
MX300 2.3.1 Humidity 26 2.3.2 Temperature 27 2.3.3 Pressure 27 2.3.4 Discrepancy in Readings 28 2.3.5 Anesthetic Gases 28 2.3.5.1 Gases That Induce Reading Error 28 2.3.5.2 Care After Use in Nitrous Oxide 29 2.3.6 Cleaning 2.4 Do’s and Don’ts 30 31 Service Manual ............................................................................ 35 3.1 General Service Information 35 3.2 Overall Maintenance 35 3.3 Battery Maintenance 35 3.4 Sensor Maintenance 36 3.5 Calibration 36 3.
Portable Oxygen Monitor List of Figures Figure 1-1: MX300 Front View......................................................... 9 Figure 2-1: Installing the R17MED Sensor .................................... 16 Figure 2-2: Sensor Cable Connection to Monitor ......................... 17 Figure 2-3: Mounting the Sensor in the Tee Adapter..................... 17 Figure 2-4: V-Mount Adapter Installation ....................................... 18 Figure 2-5: Brass Insert for Universal Mounting Clamp .............
MX300 List of Tables Table 2-1: Oxygen Reading Error in a Mixture of Anesthetic Gas . 29 Table 3-1 Troubleshooting............................................................. 39 Table 3-2 Error Codes ...................................................................
Portable Oxygen Monitor Introduction Introduction Teledyne Analytical Instruments MX300 Oxygen Monitor with alarms here after referred to as MX300 is a portable instrument that provides fast and accurate oxygen monitoring and incorporates an audio/visual alarm capability. These instruments are designed to monitor up to 100% oxygen concentration in medical gas mixtures. Because they are microprocessor-based, the MX300 instruments have a unique combination of features that make them very easy to use.
Introduction MX300 Options for alternate display configuration). An integral battery life indicator is displayed “on demand” with the MX300. The instrument is powered by three AA alkaline batteries and is designed to operate for 2000 hours in non-alarm state. Oxygen analysis is linear across the single range of 0-100% using Teledyne’s class R17MED oxygen sensor. A unique sensor failure alarm is incorporated which warns the user if the sensor signal is lost or low.
Portable Oxygen Monitor Introduction 1.2 Features The MX300 is a compact, versatile instrument capable of rapidly measuring the oxygen content of an atmosphere or environment accurately to ±2% over the range 0-100% oxygen.
Introduction MX300 Note: Contact the factory for retrofitting an existing instrument for 3-digit LCD display. For RS-232 reconfiguration, see Section 2.1.5. In addition to the above instrument configuration options, the following optional equipment is available for your instrument: • Universal Pole Mounting Clamp (P/N CP 2343) • V-Mount Pole Clamp (P/N CP 2344) • V-Mount Wall Adapter P/N B 647) • 0-1 VDC Interface Cable (P/NB-75554) • RS 232 Interface Cable (P/N B-75555) 1.
Portable Oxygen Monitor Introduction activates the audible and visual alarms if the oxygen level exceeds those values. A unique sensor fail/disconnect alarm is incorporated in the MX300 to warn the user of a sensor problem. The√ SENSOR indicator is illuminated on the LCD and the audible and visual alarms are activated whenever a fault is detected. 1.5.1 Sensor The MX300 uses the Teledyne Class R17MED disposable oxygen sensor.
Introduction MX300 alarm set points if appropriate. Using a microprocessor allows for easier setting of alarms, automatic calibration, and self-diagnosis. The oxygen level is calculated and then displayed on the liquid crystal display (LCD) on the front panel. In the MX300 monitor, user-programmed high and low alarm set points are stored in random access memory (RAM), which resides within the microprocessor.
Portable Oxygen Monitor Operation Operation Note: Upon receipt, INSPECT THE ENTIRE UNIT FOR DAMAGE. Check the unit and all included accessories for broken or loose parts. If damaged, DO NOT USE. Notify the shipper, and consult Teledyne Analytical Instruments. Note: This equipment is internally powered using 3 AA batteries. CAUTION: THE MX300, OXYGEN SENSOR AND ASSOCIATED HARDWARE ARE NON-STERILE DEVICES. DO NOT AUTOCLAVE THE INSTRUMENT OR SENSOR, AS THIS WILL DAMAGE THE EQUIPMENT. 2.
Operation MX300 2.1.1 Sensor Installation or Replacement Note: The R17MED oxygen sensor must be installed before the oxygen analyzer/monitor can be operated Remove the new sensor from its protective bag. Inspect the sensor for damage or electrolyte leakage. If the sensor is damaged, obtain a replacement. Do not use the defective sensor as it may damage the unit. WARNING: THE SENSOR ELECTROLYTE IS CAUSTIC. DO NOT LET IT COME IN CONTACT WITH SKIN. IF IT DOES, FLUSH AFFECTED AREA WITH WATER.
Portable Oxygen Monitor Operation Figure 2-2: Sensor Cable Connection to Monitor Note: When the AX/MX300 instrument is used for diffusion sampling (i.e., incubators, tents, etc.), the plastic flow diverter must be removed from the R17MED sensor. If the sensor is used in breathing circuits, etc, the diverter must be used as shown in Figure 2-3.
Operation MX300 2.1.2 Mounting The MX300 can be mounted in several ways depending on the optional equipment ordered at the time of purchase. See Section 1.3. 2.1.2.1 V-MOUNT ADAPTER INSTALLATION The V-Mount Adapter consists of a matching plastic plate with integral V-grooves that attach to the rear of the instrument. To install V-Mount Adapter remove battery compartment door by prying up the hinged latch at the bottom of the cover, then slide the adapter plate into grooves provided in rear case.
Portable Oxygen Monitor Operation 2.1.3 Battery Installation Note: Three “AA” alkaline batteries must be installed in the unit before the monitor will operate. The unit must be recalibrated whenever new batteries are installed and the HI and LOW alarm set points must be reset to the desired values To install the batteries: 1. Turn the unit off (if it is on). 2. Hold the instrument face down in the palm of your hand. Use a coin to pry up the latch that secures the battery compartment door.
Operation MX300 4. Re-install the battery compartment door. When the unit is first turned on the display will momentarily display all LCD segments. During this period diagnostic tests are being conducted to insure the circuits are functioning correctly. The unit will activate the audible and visual alarms for about 1 second. The LCD will flash continuously indicating the unit is in the unlocked position ready for calibration.
Portable Oxygen Monitor Operation 3. If the LCD is not flashing, press the LOCK/UNLOCK key to unlock the keys. LCD will flash indicating changes can be made to the settings. If the batteries have just been installed the LCD will flash 00.0 4. As with most oxygen analyzer(s) the highest level of accuracy is achieved when calibration is conducted using 100% oxygen. After installing the flow diverter as noted in Section 2.1.
Operation MX300 calibration. Air calibration should only be used for monitoring oxygen levels between 21% and 40% and should never be used where a high degree of accuracy is needed. Note: Never calibrate the unit in humidified gas, as water vapor makes the oxygen concentration appear lower than it really is. See Appendix: Humidity. CAUTION: DO NOT ADJUST THE CALIBRATION SETTINGS IN AIR AFTER THE 100% CALIBRATION, AS THIS WILL CANCEL THE MORE ACCURATE 100% CALIBRATION.
Portable Oxygen Monitor Operation you to select a LO alarm value less than 18%. Note: The MX300 Portable Oxygen Monitor is designed to prevent crossing of HI/LO alarm settings. If you attempt to set the LO alarm higher than the HI alarm, it will push the HI alarm setting up as you continue to rise the LO alarm set point. This also applies when attempting to set the HI alarm lower than the LO alarm. 3. To test the alarms, unlock the controls by pressing the LOCK/UNLOCK key and then press ALARM TEST key.
Operation MX300 Figure 2-9: 0-1 VDC or RS 232 Digital Output Port If your instrument is set for analog (0-1 VDC) output, you can reconfigure it to use the digital output by changing a jumper on the internal PC board. To activate the digital output: 1. Remove the batteries and remove the five screws that hold the case together. 2. Remove the rear case section leaving the PCB in the front half of the case. 3. Remove jumper at position JP3 and reinstall it at position JP7. 4.
Portable Oxygen Monitor Operation 2.2 Use 2.2.1 Procedure Note: Prior to use, always test the batteries and alarms (if applicable). Also check calibration, the sensor for leaks and damage, and the alarm settings. The AX/MX300 instruments can be used to measure a gas mixture for oxygen in two basic modes: • In the inhalation side of breathing circuit ahead of antibacterial filters, humidifiers and medicating devices. • In confined volumes such as incubators or tents.
Operation MX300 R17MED sensor so that it does not interfere with the rapid exchange of gases to and from the sensing surface of the sensor. CAUTION: FAILURE TO REMOVE THE DIVERTER IN THESE APPLICATION AREAS WILL RESULT IN A MARKED LOWERING OF THE RESPONSE TIME OF THE SENSOR. The R17MED sensor can be placed or hung inside incubators, tents, etc.
Portable Oxygen Monitor Operation 2.3.2 Temperature The R17MED oxygen sensor adjusts for ambient temperature changes in the range of 0–40°C (32–106°F). Since the thermistor that compensates for these changes is located in the rear of the sensor assembly, it is important that gas mixtures, flowing over the front of the sensor, be at room temperature. Reading errors may occur if hot gases from a heated humidifier are directed past a sensor teed into a breathing circuit.
Operation MX300 2.3.4 Discrepancy in Readings The MX300 instrument should be used to measure the oxygen concentration exiting another oxygen mixing device or life support system (i.e., a blender, incubator or anesthesia machine). The information obtained from the MX300 should never be used to adjust a life-support system, but should only be used as an indication that the life support system or device may require service and/or calibration.
Portable Oxygen Monitor Operation Table 2-1: Oxygen Reading Error in a Mixture of Anesthetic Gas Gas or Vapor Level (Balance: Mixture of 30% O2 / 70% N2O, except where noted) Gas or Vapor Test Level Oxygen Reading Error Helium 50%, balance O2 0% Nitrous Oxide 80%, balance O2 0% Carbon Dioxide 10%, balance O2 0% Halothane 4% < 1.5% O2 * Enflurane 5% < 1.5% O2 * Isoflurane 5% < 1.5% O2 * Sevoflurane 5% < 1.5% O2 * Desflurane 15% < 1.
Operation MX300 After exposure to nitrous oxide mixtures, the sensor should be left in 100% oxygen overnight (e.g., left in a breathing circuit that has been flushed with pure oxygen). If this is not practical, when using the Tee, remove the plastic flow diverter and leave the sensor in room air. If the oxygen reading continues to drop after each use in nitrous oxide the sensor should be removed from service.
Portable Oxygen Monitor Operation manufacturer’s instructions). Due to the varying conditions imposed on the materials during sterilization it is not possible to determine the exact number of times the sterilization processes can be carried out. Therefore, Teledyne recommends that the operators carefully examine the diverter and tee adapter after sterilization and prior to use to verify that the item is fit for use.
Operation MX300 • Recalibrate after replacing the sensor. • Use properly installed alkaline batteries only. • Make sure the R17MED sensor is properly attached. • Remove the plastic flow diverter only when using the tee adapter. • Remove and save the plastic flow diverter when using the sensor in non-flowing applications (incubators, tents, etc.) • Perform an alarm test before each use (press the ALARM TEST key). • Clean the case with isopropyl alcohol or mild detergent only.
Portable Oxygen Monitor Operation • Expose the LCD to excessive sunlight. • Expose the unit to a condensing water environment such as a mist tent.
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Portable Oxygen Monitor Service Manual Service Manual 3.1 General Service Information The Teledyne Model MX300 Portable Oxygen Monitor is designed to be robust yet compact in size. In order to achieve maximum reliability in a microprocessor-based instrument, a single PC board is used which relies exclusively on surface mount technology. Without access to specialized probes and test equipment, troubleshooting and repair of circuit board components are not feasible.
Service Manual MX300 The MX300 instrument incorporates a battery test feature that provides the approximate amount of useful life remaining on the set of batteries. Excessive alarm activation will wear down the battery faster than usual. The minimum detectable change in battery voltage corresponds to an increment of about 50 hours, meaning that the battery voltage reading may not change for several hours at a time.
Portable Oxygen Monitor Service Manual 3.6 Alarms To set the alarms on the MX300 monitor, refer to Section 2.1.4. 3.7 Gas Sampling 3.7.1 Humidity Humidity does not directly affect the accuracy of the sensor's measurement. However, when a nebulizer or other device is used to increase moisture levels in gas mixtures, the moisture actually dilutes the mixture. This dilution effect decreases the oxygen concentration.
Service Manual MX300 3.7.3 Pressure Virtually all gas sensors and monitors measure the partial pressure, not the percentage, of the gas that they sense. The only time that these instruments can accurately read percentages is when the total pressure does not vary over time between calibrations and use. For this reason it is important to calibrate the MX300 oxygen sensor at regular intervals. It is recommended that the unit be calibrated prior to each use or every 8 hours.
Portable Oxygen Monitor Service Manual Note: The MSDS on this material is located in the Appendix. It is also available upon request through the Teledyne Environmental, Health and Safety Coordinator. Contact at (626) 934-1592 3.8 Troubleshooting The MX300 oxygen monitor provides a variety of built-in safety features that prevents its use when a fault is detected.
Service Manual MX300 Symptom Why The sensor does not react to changes in oxygen concentration, or the readings are unstable and drifting. Water is condensing on the sensing surface. Electrical interference is disrupting the electronics What To Do A) Remove the sensor from tee adapter and unscrew the plastic flow diverter. Using absorbent tissue or cotton swab, gently wipe off sensing surface inside threaded portion of sensor assembly.
Portable Oxygen Monitor Service Manual Symptom Why What To Do The unit has stopped working and the LCD is displaying alphanumeric figures. The MX300 instruments are equipped with an electronic "watch dog," which monitors the circuitry within the unit for potential faults and renders the unit inoperable until the condition is corrected. (See Watch dog section below) A) Disconnect the batteries and inspect the contacts for corrosion. Reconnect the batteries.
Service Manual MX300 3.9 Watchdog The MX300 is equipped with a watchdog circuit that continuously monitors the electronics for proper operation. If the watchdog detects a failure, one of the following codes will appear on the LCD. The error codes can appear on the LCD when batteries are first installed, during normal operation or if the unit is subjected to extreme shock. In some cases an additional digit is used in the error code to supply additional information.
Portable Oxygen Monitor Service Manual 5 - Silence 6 - High Alarm 7 - Alarm Test 8 - Key Lock 7(2) 7 (There is no indication of the type of DAC failure) A failure has occurred during the automatic calibration of the digital to analog converter (DAC) circuit. The second digit example (2) shows the type of digital to analog failure. 0 - Measurement 1 - High Test 2 - Low Test 3 - Offset Cal 4 - Gain Cal 3.
Service Manual MX300 3.11 Return Authorization for Service For any service beyond sensor and battery replacement, the instrument must be returned to the factory. A return merchandise authorization (RMA) number must be obtained from Teledyne Analytical Instruments prior to returning an instrument for service. You can request a RMA number via email by contacting us at: tetci_customerservice@teledyne.com You can also contact us at the address below.
Portable Oxygen Monitor Appendix Appendix A.1 Specifications Range: 0-100% oxygen Accuracy: +2% of full scale (at constant temperature and pressure) Response Time: 90% in less than 8 seconds at 25 °C Battery Life: Approximately 2000 hr. continuous use in a non-alarm condition System Power: 3 AA alkaline batteries. Sensor Type: Class R17MED Expected Life: 36 months in air. (10 months when continuously exposed to 100% oxygen) Dimensions: 2.5" W × 1.25" D × 4.5" H (66 mm x 33mm × 111.
Appendix MX300 A.2 Spare Parts List QTY 1 PART NO C43690-R17MED 3 1 1 1 1 1 1 1 1 B99 B69934 A268 B-74543 D-74459 C-74461 B-74462 B-74463 B-74466 DESCRIPTION Micro-Fuel Cell R17MED with flow diverter P/N A50057 “AA” size alkaline battery Cable assembly Tee adapter (22 mm) Front panel assembly Back panel Battery door Battery door lock Mounting clip Base assembly A.
Portable Oxygen Monitor Appendix Note: Orders for replacement parts should include the part number (if available) and the model and serial number of the instrument for which the parts are intended. Orders should be sent to: TELEDYNE Analytical Instruments 16830 Chestnut Street City of Industry, CA 91749-1580 Phone (626) 934-1500, Fax (626) 961-2538 Web: www.teledyne-ai.com Or your local representative.
Appendix MX300 BLANK Teledyne Analytical Instruments 48
Portable Oxygen Monitor index Index accessories, 46 accuracy, 45 address, 44, 47 alarm setpoints, 22 alarm setpoints, 22 alarm setpoints, 10, 14 alarm settings crossover of, 23 ALARM SILENCE button, 10, 14, 15 ALARM TEST button, 23, 32 amplification, 13 analog output, 23 analysis range, 10, 45 anesthetic gas, 28 anode, 13 audio alarm, 14 BATT TEST button, 15, 20 batteries, 10, 19 battery compartment, 19 battery installation, 19 battery status indicator, 10 battery test, 36 breathing circuits, 25 cable, 16
Index MX300 sensor, 10, 12 sensor cable, 45 sensor failure alarm, 10 sensor life, 45 sensor maintenance, 36 sensor mounting, 17 set up, 15 setpoints.
