Teledyne TED 191 User's Manual
Contents
1. M TELEDYNE ELECTRONIC TECHNOLOGIES Analytical Instruments 27 TECHNICAL SERVICE LOG DATE WARRANTY DETAILS REMARKS TELEDYNE ELECTRONIC TECHNOLOGIES Analytical Instruments 28 GENERAL NOTES TELEDYNE ELECTRONIC TECHNOLOGIES Analytical Instruments 29 SPARE PARTS LIST SPARE PARTS PART NUMBER DESCRIPTION A51327 Micro Fuel Cell T 7 with flow diverter P N A50057 Cabeassemby 1 1 1 1 1 1 O C885 Cable assembly A268 Tee adapter 22mm OPTIONAL ACCESSORIES PART NUMBER DESCRIPTION B34102 Mounting Clamp C53790 Calibration Assembly A284 Universal adapter set for paediatric circuits 15mm A274 Tee adapter autoclaveable A283 Tee adapter metal A minimum charge of US 20 00 is applicable to spare parts orders Important Orders for spare parts should include the model number serial number and range of the analyzer for which the parts are intended Orders should be sent to Teledyne Electronic Technologies Analytical Instruments 16830 Chestnut Street City of Industry CA 91749 1580 Phone 626 934 1500 Fax 626 961 2538 TWX 910 584 1887 TDYANLY COID Web www teledyne ai com or your local representative M TELEDYNE ELECTRONIC TECHNOLOGIES2. Analytical Instruments 30
3. circuits or the localised environment e g incubators or oxygen tents that requires to be monitored It is highly recommended that a flow diverter be used when monitoring a dynamic gas stream This will prevent sample stagnation and create a vortex effect that will facilitate a more accurate continuous assessment of the gas stream being monitored The flow diverter should be plugged into a T adapter which must be located in line Note Check the breathing circuit for leaks Ensure that the circuit downstream of the sensor does not produce any back pressure or restrictions of the gas flow or errors in the readings will result When using the instrument in a static environment such as in an incubator the flow diverter should be removed so that it does not interfere with the rapid exchange of gases through the gas permeable membrane of the sensor cell When it is necessary to thread the cable through a small hole in order to gain access to the inside of the chamber the instrument should be switched off the cable should be disconnected at the sensor threaded through the hole and reconnected inside the chamber see1 3 above before commencing as described above Note Failure to remove the flow diverter will result in the marked slowing of the sensor response time The instrument will display the measured oxygen concentration The high and low alarms should be set as detailed in 1 6 below When using the instrument in the presence of a
4. the Accurox Oxygen Monitor if you suspect any malfunction Bd Use the monitor in the presence of flammable anaesthetics Bd Autoclave the instrument and or the sensor x Submerge the instrument and or sensor in water or any other liquid Bd Expose instrument to other equipment with high levels of RFI emission Bd Place the instrument itself in a water vapour saturated environment x Expose the LCD to excessive direct sunlight Bd Dispose of the sensor cell in fire or place in an incinerator M TELEDYNE ELECTRONIC TECHNOLOGIES Analytical Instruments 16 SECTION FIVE ROUTINE MAINTENANCE 5 1 ROUTINE VISUAL INSPECTION Always inspect the instrument prior to use for obvious damage or for parts or components missing Make a point of checking the oxygen sensor cell for signs of electrolyte leakage water condensation on the sensing surface Also check the integrity of the cable and all cable connections 5 2 CHANGING BATTERIES From time to time the 4 x AA penlight dry cell batteries that power the instrument will require replacement This requirement will be indicated via a LO BAT alarm message located in the top left hand corner of the LCD display It is also possible if the instrument has not been used for sometime that the batteries will be depleted to the extent that the instrument will not power up when switched on In both instances the batteries must be replaced To change the batteries follow the procedures set out in 1 2 ab
5. ED 191 Portable Oxygen Monitor is designed and manufactured in accordance with strict performance and quality protocols and subject to ISO 9002 Quality System protocols When used correctly this instrument will provide you with many years of trouble free service The TED 191 Portable Oxygen Monitor is a compact self contained unit which is battery powered by four 4 dry cell batteries size AA penlight M TELEDYNE ELECTRONIC TECHNOLOGIES Analytical Instruments APPLICATIONS The instrument is designed for the measurement of oxygen concentrations in a variety of medical gas mixtures It is recommended that the instrument be used only as a secondary measuring device to verify the concentration of oxygen in gas mixtures prepared using a gas blender or similar apparatus The use of this monitor as a primary or only means of preparing gas mixtures is not advised The monitor is capable of verifying oxygen concentrations in gas mixtures used in Anesthesia Neonatal Intensive care Adult Intensive care Respiratory Oxygen Therapy M TELEDYNE ELECTRONIC TECHNOLOGIES Analytical Instruments FRONT PANEL High Alarm Setting Knob DESCRIPTION OF FUNCTIONAL ZONES Alarm Mute Button Calibration Control 236 TELEDYNE e EE OXYGEN OXYGEN MONITOR Low Alarm Setting Knob On Off Switch Alarm Mute Switch Calibration Control High Alarm Setting Low alarm setting Knob Liquid Crystal Display L
6. High Alarm 40 20 Oxygen Concentration Reading The instrument will alarm at any oxygen concentration below 18 In the event of a violation of the pre set alarm limits the instrument will provide both an audible and a visual alarm signal Under these conditions it is possible to mute or temporarily silence the audible alarm tone for about 60 seconds to allow corrective action to be taken If the condition is not rectified within this time then the audible alarm tone will be automatically reinstated Audible alarm signals are tonally matched to the type of threshold violations i e low alarm violations are signalled via a lower pitched audible signal while high alarm violations are signalled via a higher pitched audible signal M TELEDYNE ELECTRONIC TECHNOLOGIES Analytical Instruments 13 SECTION TWO ANAESTHETIC AGENTS 2 ANAESTHETIC AGENTS The anaesthetic agents listed in the following table Halothane Enflurane Isoflurane Sevoflurane and Desflurane were vaporised into a stream of 30 oxygen 70 nitrous oxide The resultant drops in displayed oxygen concentration after a 2 hour exposure period were observed Exposurers in excess of 2 hours will provide marginally greater errors The errors listed are typical for all gas permeable membrane oxygen sensors Exposure of the sensor to gas free from any anaesthetic contamination for a period of equal or greater than the exposure period will eliminate the measur
7. TED 191 PORTABLE OXYGEN MONITOR INSTRUCTION MANUAL j TYPE B EQUIPMENT Equipment providing a particular degree of protec tion against electric shock particularly regarding allowable LEAKAGE CURRENT Reliability of the protective earth connection if present P N TM0021 04 03 00 ECO 00 0086 gm TELEDYNE ELECTRONIC TECHNOLOGIES Analytical Instruments COPYRIGHT 1996 TELEDYNE ELECTRONIC TECHNOLOGIES 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 manual or otherwise without the prior written consent of Teledyne Electronic Technologies Analytical Instruments 16830 Chestnut Street City of Industry CA 91749 1580 Phone 626 934 1500 FAX 626 961 2538 Technical Support 626 934 1673 TWX 910 584 1887 TDYANLY COID or your local representative WARRANTY STATEMENT The electronic control and display components of the TED 191 Portable Oxygen Monitor are warranted against defective workmanship and materials for 24 months from date of shipment from Teledyne The class T 7 Micro Fuel Cell is warranted for one year from the date of shipment from Teledyne The liability of Teledyne if any shall be limited solely to the replacement and repair of the good
8. ability to achieve 5 Check quality of calibration gas 6 Check that the calibration gas is dry not humidified 7 Wait for 1 or 2 minutes then attempt a re calibration 8 Check sensor cell for damage or electrolyte leaks 9 Return monitor to authorized service agent for repair Constant non mutable 1 Check high and low alarm settings for possible crossed settings alarm condition i e high threshold value is set lower than low threshold value 1 Do not hold the sensor whilst calibrating as the warmth from your hand may cause the ambient temperature compensation circuit to Drift is displayed activate resulting in unstable displayed values readings whilst TNT calibrating or 2 Try calibrating a known good sensor immediately thereafter 3 Repeat calibration 4 Replace the sensor cell There is no reaction to changes in oxygen concentration Remove the sensor tip from the T adaptor unscrew the flow diverter and gently swab any excess moisture off the sensor cell membrane then flow dry gas over the membrane TELEDYNE ELECTRONIC TECHNOLOGIES Analytical Instruments 18 TROUBLESHOOTING SYMPTOM REMARK The displayed readings Remove the sensor tip from the T adaptor unscrew the flow diverter and gently swab any excess moisture off the sensor cell membrane then flow dry gas over the membrane are unstable 2 Check for a sourc
9. awer contains 4 x AA Penlight batteries required to power the instrument The Oxygen Sensor Connector Cable is plugged into this one way socket TELEDYNE ELECTRONIC TECHNOLOGIES Analytical Instruments SECTION ONE OPERATIONS Note Upon receipt inspect the entire unit and accompanying accessories for damage or broken or loose parts If damaged do not use Notify the Shipper and consult Teledyne Electronic Technologies Analytical Instruments 1 1 SET UP To set up your TED 191 Portable Oxygen Monitor 1 1 1 Install the Batteries See 1 2 below for procedure 1 1 2 Install the Sensor See 1 3 below for procedure 1 1 3 Calibrate the Instrument See 1 4 below for procedure 1 1 4 Normal Operation See 1 5 below for procedure 1 1 5 Setthe Alarms See 1 6 below for procedure M TELEDYNE ELECTRONIC TECHNOLOGIES Analytical Instruments OPERATIONS 1 2 INSTALLING THE BATTERIES Withdraw the battery drawer from the monitor casing by grasping the side lugs located on either side of the battery drawer and firmly pinching them inwards simultaneously pull the drawer outwards When new this action can be somewhat stiff and difficult to execute Care should be taken not to damage either the drawer or the casing of the monitor when executing this procedure Fresh batteries must be inserted into the four battery recepticles located within the battery drawer assembly Care should be taken to ensure that the correct battery polarit
10. d environmental oxygen concentration DISPLAY TYPE Liquid Crystal Display LCD SENSOR TYPE Class T 7 Galvanic ACCURACY Approximately 2 linear SENSOR LIFE Approximately 12 months in most applications TELEDYNE ELECTRONIC TECHNOLOGIES Analytical Instruments 20 TECHNICAL SPECIFICATIONS SENSOR RESPONSE TIME Less than 6 seconds to 90 of final measured value in response to a step change in the actual oxygen concentration being measured Technical manual will be supplied on request to user s appropriately qualified personnel for repair of components designated as repairable by the manufacturer SERVICE No parts other than the sensor cell and dry cell batteries deteriorate during normal use Can be stored and transported between 30 C and 50 C STORAGE AND TRANSPORT Can be stored and transported at up to 75 relative humidity non condensing Operation of instrument is unaffected by Humidity water vapour saturated gas GENERAL Pressure up to 100cm H20 Nitrous oxide N2O Halothane Enflurane or any other anaesthetic gas or vaporised agent Multiple mounting bracket configurations to suit any mounting requirement Custom engineered solutions available on request M TELEDYNE ELECTRONIC TECHNOLOGIES Analytical Instruments 21 SECTION EIGHT EFFECT OF PRESSURE Virtually all gas sensors and analysers measure the partial pressure not the percentage of the gas
11. e i e flow blockage primary device error etc Further investigation should be made until the discrepancy in readings is resolved If it is found that replacing the sensor and or batteries does not give proper calibration results the troubleshooting section of this manual should be consulted M TELEDYNE ELECTRONIC TECHNOLOGIES Analytical Instruments 25 SECTION TWELVE REPAIR SERVICE In the event that your TED 191 Portable Oxygen Monitor requires service the following steps will help to ensure that the repair request is processed promptly Contact your authorised Teledyne Electronic Technologies Analytical Instruments distributor or factory for return instructions Do not ship your monitor without first obtaining authorisation Include a copy of the sales invoice or other proof of purchase date Warranty service may be denied if no proof of purchase is included It is your responsibility to pay shipping charges to Teledyne Analytical Instruments If the unit is under warranty the serviced or replaced monitor will be returned to you postage prepaid Monitors and sensors damaged by accident or misuse are not covered by the warranty In these cases service charges will be based on time and materials M TELEDYNE ELECTRONIC TECHNOLOGIES Analytical Instruments 26 SENSOR CELL REPLACEMENT LOG DATE WARRANTY SERIAL NUMBER REMARKS N A MANUFACTURED
12. e event that calibration is once more unsuccessful check that the purity of the calibration gas being used is valid If the quality of the oxygen being used in the calibration process is acceptable and calibration is still impossible replace the oxygen sensing cell Note The calibration process should always be executed in dry non humidified oxygen Water vapour dilutes the oxygen concentration which can produce errors in the calibration The accuracy of the instrument is only as good as the quality of the calibration process Note It is not uncommon for the ambient air in hospital wards to be as high as 23 If the unit fails the 21 calibration reading move the instrument to a location where oxygen contamination is unlikely M TELEDYNE ELECTRONIC TECHNOLOGIES Analytical Instruments T 1 5 OPERATIONS NORMAL OPERATION Switch the instrument on using the On Off Switch Validate the calibration of the instrument by exposing the oxygen sensor to room air and verifying that the display on the instrument reads 100 2 A further check can be carried out by exposing the sensor to a stream of 21 oxygen and verifying that the display on the instrument reads 100 2 Should this validation procedure indicate that the instrument is out of calibration follow the calibration procedures set out in 1 4 above Once the calibration of the instrument has been verified place the sensor tip within the stream of gas e g breathing
13. e of RFI emission Relocate the instrument 3 Check that the calibration control knob is properly locked in position 1 The sensor is not plugged in Instrument reads 00 2 There is bad sensor cable or cable monitor connection Displayed value drifts 1 Replace sensor cable by 2 3 over 3 4 hours 2 Replace cable Alarm continuously activates when displayed value is less than 18 The minimum low alarm threshold is 18 The Teledyne TED 191 will always alarm under these conditions TELEDYNE ELECTRONIC TECHNOLOGIES Analytical Instruments 19 SECTION SEVEN TECHNICAL SPECIFICATIONS SAFETY CLASSIFICATION Complies to IEC 601 Safety of Medical Equipment Internally powered equipment Drip proof IPX 1 Not suitable for used with flammable anaesthetic mixture POWER Internal DC 6V 4 dry cell batteries size AA penlight MASS 525 grams with T 7 oxygen sensor DIMENSIONS 59mm H x 152mm W x 115mm D Approximately 900 hours of continuous non alarming operation BATTERY DURATION Low battery status indication is provided Replace batteries within 48 hours of low battery indication High oxygen concentration 18 to 102 Low oxygen concentration 1896 to 10096 ALARMS Low battery visual alarm only Most alarm conditions are signalled audibly and visually with a 60 second audible alarm mute facility provided MEASUREMENT RANGE 100 of localise
14. ement error in most instances Gas or Vapor Level Balance Mixture of 30 70 N O except where noted Gas or Vapor Test Level Oxygen Reading Error 50 balance 096 80 balance O Carbon Dioxide 10 balance lt 1 5 lt 1 5 Errors are approximate and may vary based on exposure times and concentrations These performances meet or exceed the requirements of ISO 7767 1997 E Caution The TED 191 Portable Oxygen Monitor should not be used in the presence of flammable anaesthetics such as diethal ether or cyclpropane The T 7 oxygen sensor should not be left in nitrous oxide mixtures any longer than absolutely necessary 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 the oxygen reading continues to drop after each use in nitrous oxide the sensor should be removed from service If the sensor can no longer be calibrated or if there is any sign of electrolyte leakage the sensor should be disposed of in accordance with local regulations and the specific guidelines as given in the Material Safety Data Sheet of the sensor M TELEDYNE ELECTRONIC TECHNOLOGIES Analytical Instruments 14 SECTION THREE CLEANING AND STERILISATION 3 1 3 2 CLEANING THE TED 191 PORTABLE OXYGEN MONITOR The instrument itself should be cleaned using a damp cloth In the event of an excessive bu
15. he entire sensor assembly is placed in the gas mixture to be analysed e g incubators No adjustments should be made during this period about 1 to 2 hours since this error will be eliminated when both the thermistor and sensing electrode have had sufficient time to come to thermal equilibrium M TELEDYNE ELECTRONIC TECHNOLOGIES Analytical Instruments 24 SECTION ELEVEN DISCREPANCY IN READINGS The TED 191 is intended to be used as a secondary oxygen monitor meaning that it is intended to verify the accuracy of and check the oxygen concentration leaving another oxygen mixing device or primary life support system i e a blender or anaesthesia machine Whenever there is a significant difference in the oxygen readings between the primary and secondary monitors the discrepancy must be resolved immediately The information obtained from the TED 191 should never be used to make adjustments to the primary life support system but should only be used as an indication that the primary device may require service and or calibration The LO BAT message immediately tells you if the batteries need replacing The TED 191 should momentarily be removed from the application area and the batteries replaced If the TED 191 can be calibrated the unit can be assumed to be in good working order and capable of providing readings to specification If after re installing the TED 191 the discrepancy in oxygen readings persists the problem is most likely elsewher
16. ild up of dirt a mild alcohol solution isopropyl may be used to wipe over the instrument which should be allowed to air dry afterwards In extreme cases the monitor casing may be cleaned using a mild detergent Note The Accurox Oxygen monitor cannot be liquid sterilised or autoclaved irreparable damage may result STERILISING THE T 7 OXYGEN SENSOR AND CONNECTING CABLE The T 7 oxygen sensors and connecting cables used on the instrument may be gas sterilised using low temperature ethylene oxide A vacuum must not be drawn on the sensor during the sterilisation process M TELEDYNE ELECTRONIC TECHNOLOGIES Analytical Instruments 15 SECTION FOUR Do s AND DON TS Do s S E A A S xS sx RN Read the Operators Manual thoroughly before using the instrument Calibrate once per shift and prior to each and every use Check the high and low alarm threshold settings prior to use Replace the batteries immediately when required Keep the instrument cable and sensor dry at all times Re calibrate after changing the sensor or batteries Visually inspect the whole instrument prior to use Check the integrity of all cable connections routinely Remove and carefully store the flow diverter when using the instrument in static environments such as incubators oxygen hoods etc Perform an alarm functionality test prior to each use Remove batteries if the instrument is not to be used for a month plus DON TS x Use
17. iquid Crystal Display LCD On Off Switch Allows the operator to turn the instrument on and off Allows the operator to mute the sound of the audible alarm signal for 60 seconds During this time a red signal lamp will flash indicating a muted alarm condition is in force Allows the operator to calibrate the instrument to one primary set point usually 100 in accordance with the designated calibration protocol This protocol is defined further in this manual and also Instructions in abbreviated form can be found on the top of the monitor casing Allows the operator to define a high alarm threshold limit Range 18 to 102 if the actual measured value as displayed on the LCD exceeds this set threshold an audible and visual alarm condition will be invoked Allows the operator to define a low alarm threshold limit Range 18 to 100 if the actual measured value as displayed on the LCD falls below this set threshold an audible and visual alarm condition will be invoked Displays measured oxygen concentration low battery condition and provides a visual indication of either a high or low alarm threshold violation M TELEDYNE ELECTRONIC TECHNOLOGIES Analytical Instruments REAR PANEL DESCRIPTION OF FUNCTIONAL ZONES e p 4 9 Battery Drawer Battery Drawer Sensor Cable Connector Plug Sensor Cable Connector Plug The Battery Dr
18. naesthetic agents it is possible for the measured value to reflect a fall The magnitude of this fall is related to the level of oxygen concentration and the duration of the exposure to the anaesthetic agent See 1 7 below for further details M TELEDYNE ELECTRONIC TECHNOLOGIES Analytical Instruments 12 1 6 OPERATIONS SET THE ALARMS The lines indicating the 100 graduations around the High and Low Alarm Settings Knobs are only intended as guides and not as precise settings Once the desired oxygen concentration has been set bring the high alarm setting down by turning the High Alarm Setting Knob anti clockwise until the alarm is triggered and then take the high alarm setting up by approximately 5 Bring the low alarm setting up by turning the Low Alarm Setting Knob clockwise until the alarm is triggered then take the setting down by approximately 5 These settings will create a window of approximately 10 within which the set oxygen concentration will now be measured This window can be increased or decreased according to the users requirements Any deviation from this set window will trigger the alarm The graph alarm is accurate at 100 and within 8 at 21 and the low alarm is most accurate at 21 and within 8 at 100 This is depicted in the graph below Oxygen Monitor Alarm Setting Tolerances 100 80 D c t Alarm Point B os larm Poin E vise teet Low Alarm lt x
19. ove Initiate a calibration once the new batteries are installed prior to using the instrument 5 3 CHANGING THE OXYGEN SENSOR CELL From time to time the oxygen sensor cell being a consumptive electro chemical device will require replacement This requirement will be indicated via an inability to achieve calibration i e the range provided by the Calibration Control Knob will not be sufficient to achieve the setting of 100 on the LCD display when exposing the sensor tip to 100 pure oxygen To change the oxygen sensor follow the procedures set out in 1 3 above Initiate a calibration once the new sensor has been installed prior to using the instrument A Sensor Cell Replacement Log has been provided for the reference of the users and is located at the back of this Instruction Manual The details of the replacement sensor should be entered into this log at the time of changing M TELEDYNE ELECTRONIC TECHNOLOGIES Analytical Instruments 17 SECTION SIX TROUBLESHOOTING SYMPTOM REMARK Check battery drawer is properly located No numeric display on 2 Check battery polarity us EOP When powered 3 Check batteries for replacement 4 External power check polarity and voltage of supply check if functional on batteries 1 Check calibration process as described in section 1 4 2 Check flow rate of calibrating gas 6 8 lpm 3 Check sensor cell connection 4 Check sensor cable connection In
20. s and shall not include shipping costs or other incidental damages as defined in Section 2 715 of the U S Uniform Commercial Code This warranty is null and void if any goods are subjected to misuse negligence accident or repairs other than those performed by Teledyne or an authorized service center Caution Federal Law restricts this device to sale by or on the order of a physician M TELEDYNE ELECTRONIC TECHNOLOGIES Analytical Instruments TABLE OF CONTENTS SECTION TOPIC h cl OnRONM 10 11 12 INTRODUCTION APPLICATIONS DESCRIPTIONS OF FUNCTIONAL ZONES FRONT PANEL REAR PANEL OPERATIONS SET UP INSTALL THE BATTERIES INSTALL THE SENSOR CALIBRATE THE INSTRUMENT NORMAL OPERATION SET THE ALARMS ANAESTHETIC AGENTS CLEANING AND DON T S ROUTINE MAINTENANCE TROUBLESHOOTING TECHNICAL SPECIFICATIONS EFFECT OF PRESSURE EFFECT OF HUMIDITY EFFECT OF TEMPERATURE DISCREPANCY IN READING REPAIR SERVICE SENSOR CELL REPLACEMENT LOG TECHNICAL SERVICE LOG GENERAL NOTES SPARE PARTS LIST TELEDYNE ELECTRONIC TECHNOLOGIES Analytical Instruments PAGE NUMBER 20 22 23 24 25 26 27 28 29 30 INTRODUCTION The TED 191 Portable Oxygen Monitor is an easy to use portable instrument that provides fast and accurate oxygen monitoring and audio visual alarm capability The TED 191 is designed to monitor concentrations of up to 100 oxygen in medical gas mixtures The T
21. that they sense The only time that these instruments can accurately read percentages is when the total pressure does not vary over time between calibration and use This is why it is important to calibrate the TED 191 Portable Oxygen Monitor at regular intervals It is recommended that the instrument be calibrated prior to each use or every 8 hours When the sensor is connected to a ventilator circuit the alternating breathing pressure cycles generated by the ventilator will be sensed as an increase in the oxygen percentage especially if the sensor is fast enough to sense the changes In reality the percentage of oxygen is not changing it is the total pressure that is increasing producing a corresponding increase in the partial pressure of oxygen A hundred centimeter water pressure pulse will produce a 11 atmosphere or an 11 increase in the total and therefore partial pressure of oxygen Assuming that the sensor is fast enough to track this pressure pulse an unpressurised reading of 50 oxygen will increase to 55 3 if the sensor is subjected to a pressure cycle of 100cm H2O The reading will rise proportionally less for smaller pressures M TELEDYNE ELECTRONIC TECHNOLOGIES Analytical Instruments 22 SECTION NINE EFFECT OF HUMIDITY Humidity does not directly affect the accuracy of the sensor s measurement However when a nebuliser or other device is used to increase moisture levels in gas mixtures the moisture actually dilutes
22. the mixture This dilution effect decreases the oxygen concentration For example if an 80 oxygen gas mixture is humidified to saturation at room temperature the resulting gas mixture will contain only 77 5 oxygen Your TED 191 Portable Oxygen Monitor accurately measures decreases in the oxygen concentration due to the dilution effects of moisture added to gas mixtures As with all oxygen sensors excessive condensation on the sensing surface will block the diffusion of oxygen to the sensor rendering it inoperative It is recommended that the sensor be installed on the dry side of the breathing circuit at all times Water condensate on the exposed cable contacts at the rear of the sensor may affect the oxygen reading and should be removed by shaking out the condensed water and allowing the sensor to air dry M TELEDYNE ELECTRONIC TECHNOLOGIES Analytical Instruments 23 SECTION TEN EFFECT OF TEMPERATURE The Teledyne Electronic Technologies Analytical Intruments sensors adjust 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 A small thermal tracking error may be encountered in applications where t
23. xygen Cell see Section Page 15 below Caution Do NOT autoclave the oxygen sensor M TELEDYNE ELECTRONIC TECHNOLOGIES Analytical Instruments 10 1 4 OPERATIONS CALIBRATE THE INSTRUMENT Calibration should be effected at least once per shift and always prior to the use of the instrument Note Never expose the sensor to varying temperatures while calibrating i e never hold the sensor in your hand Ensure that the instrument is switched on and that the oxygen sensor is connected to the instrument via the coiled cable Expose the sensor tip to pure 100 free flowing oxygen a flow rate of approximately 6 to 8 litres per minute is recommended Tip For best calibration results use a T adapter and flow diverter within a flow circuit with the flow diverter attached to the sensor allowing pure dry oxygen to flow past the sensor assembly Allow the displayed value to stabilize Pull out the Calibration Control Knob and rotate until the displayed value is stable at 100 At this point push the Calibration Control Knob back into its locked position Turn off oxygen supply and place sensor in ambient air Remove the flow diverter from the Sensor if one was used during the calibration process Observe that the displayed value falls to 21 2 Calibration has been successful In the event that the displayed value does not reflect 21 2 initiate a re calibration following the steps outlined above In th
24. y is maintained Caution Improper installation of the batteries may result in heat damage to the batteries Re insert the battery drawer into the monitor casing and close M TELEDYNE ELECTRONIC TECHNOLOGIES Analytical Instruments 1 3 OPERATIONS INSTALLING THE OXYGEN SENSOR The T 7 Oxygen Sensor must be installed before the instrument can be used Ensure that the monitor is switched off Remove the 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 be damaged Caution the sensor electrolyte is caustic Do not let it come into contact with skin If it does immediately flush the affective area with water Consult the Emergency First Aid procedures as set out in the Material Safety Data Sheet for the sensor Do not attempt to open or repair the sensor Leaking or exhausted sensors should be disposed of in accordance with local regulations Consult the Material safety Data Sheet supplied with the sensor Plug one end of the coiled cable into the telephone jack receptacle on the end of the sensor The jack will only fit one way so if it does not fit rotate it until it slides in easily Plug the other end of the coiled cable into the receptacle located on the right hand side of the rear panel of the instrument This jack will only fit one way so do not force it Note For sterilization procedures on the O
Download Pdf Manuals
Related Search