Teledyne TED 200-T User manual

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TED200-T
PORTABLEOXYGENMONITOR
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 MC41901.02
04/09/99
ECO #99-0159
INSTRUCTIONMANUAL

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Copyright © 1999 Teledyne Electronic Technologies
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 ElectronicTechnologies, 16830
Chestnut Street, City of Industry, CA 91749–1580
FCC Statement
This equipment generates and uses radio frequency energy, and if not installed and used
instrictaccordancewiththemanufacturer'sinstructionmanual,may causeinterference
to radio and TV communications. It has been type-tested and certified to comply with
the limits for a Class A, and exceeds limits for a Class B, computing device pursuant to
Subpart J of FCC Rules, which are designed to provide reasonable protection against
suchinterferencewhen installed in a commercial and residential environment. Opera-
tion of this equipment in a residential area may cause interference, in which case the
user, at his own expense, will be required to take whatever measures may be required to
correcttheinterference.
Note: The above statement is required by the FCC for any device that incorporates
microprocessors.
NOTE: This analyzer has been evaluated according to ISO 7767
1997 Non compliances to this standard exist in relation to
the requirements for Alarm frequency, audibility, maximum
silence period, and low alarm threshold minimum level.

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Warranty
Teledyne warrants that the goods are free from defects of material and of construction
for a period of 2 years from the 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
goods 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, acci-
dent, 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.
RFI/EMI Immunity
The Teledyne Model TED 200-T has been tested to the standard required by the
European Community for CE marking, EN 60601-1-2.
The sample subjected to testing passed all sections of this testing with the exception of
thefollowing:
From 26MHz to 250MHz, the display was unstable. When interference
was removed, the equipment under test recovered.
From 250MHz to 1000MHz, the display was stable.

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Table of Contents
1Introduction
1.1 Applications ...................................................................................... 1-1
1.2 Theory of Operation.......................................................................... 1-2
1.2.1 Sensor ..................................................................................... 1-2
1.2.2 Signal Processing .................................................................... 1-3
2Operations
2.1 Setup ................................................................................................. 2-1
2.1.1 Battery Installation or Replacement........................................ 2-2
2.1.2 Sensor Installation or Replacement......................................... 2-3
2.1.3 Calibration............................................................................... 2-4
2.1.4 Alarms ..................................................................................... 2-5
2.2 Use .................................................................................................... 2-6
2.2.1 Procedure................................................................................ 2-6
2.2.2 Anesthetic Gases ..................................................................... 2-7
2.2.2.1 Gasses That Induce Reading Error ..................................... 2-7
2.2.2.2 Care After Use in Nitrous Oxide......................................... 2-8
2.2.3 Sterilization ............................................................................. 2-8
2.3 Do's & Don'ts .................................................................................... 2-9
3MaintenanceandTroubleshooting
3.1 TED 200-T Overall Maintenance ..................................................... 3-1
3.2 BatteryMaintenance ......................................................................... 3-1
3.3 Sensor ............................................................................................... 3-2
3.4 Troubleshooting ................................................................................ 3-2
Appendices
A.1 Specifications .................................................................................... A-1
A.2 Spare Parts List ................................................................................. A-1
A.3 OptionalAccessories......................................................................... A-2
A.4 RepairService ................................................................................... A-3
A.5 EnvironmentalEffects ....................................................................... A-3
A.5.1 Pressure .................................................................................. A-4
A.5.2 Humidity................................................................................. A-4
A.5.3 Temperature ........................................................................... A-5
A.5.4 Discrepancy in Readings ........................................................ A-5
A.6 Material Safety Data Sheet ............................................................... A-6

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How To Use This Manual
This manual is designed to walk you through the initial set-up of the TED 200-T.
After you have used it to initially install your monitor, it becomes a quick reference
guide to help you with specific questions or operating problems.
Before you even turn on the monitor, you are advised to read Chapters 1 and 2. These
chapters help you to become better acquainted with the monitor and how it works
before you actually begin to use it.
Please read Chapter 2: Operations in its entirety before proceeding further with the
manual.
About This Manual
The TED 200-T Operator's Manual provides both introductory and detailed informa-
tion for installing and operating the monitor. The manual takes you from the time you
unpack the box until you complete the first normal operating sample 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. A complete product specifications and spare parts list is also
included as an appendix.
Chapter 1: An introduction to the monitor and its components, features and applica-
tions.
Chapter 2: Step-by-step set-up procedures and information.
Chapter 3: A guide for daily operational maintenance and troubleshooting.
Appendix: Specifications and available spare part options for the monitor, and
detailed application considerations to aid in troubleshooting, etc.

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Introduction 1
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Introduction
The Teledyne Electronics Technologies 200-T Portable Oxygen Monitor is an
easy-to-use, portable instrument that provides fast and accurate oxygen monitoring
and audio/visual alarm capability. The TED 200-T is designed to monitor up to 100 %
oxygen concentration in medical gas mixtures. Because it is microprocessor-based,
the TED 200-T has a unique combination of features and is very easy to use through a
touch panel designed for minimal operator interface.
1.1 Applications
The TED 200-T is designed to be used for monitoring oxygen concentrations in a
variety of medical gas mixtures. This instrument should never be used as a primary
monitoring device. It is recommended that the instrument only be used as a secondary
measuring device to verify the concentration of oxygen in gas mixtures prepared
using a gas blender, anesthesia gas machine, or similar apparatus.
Figure 1: Front view of the TED 200-T

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The monitor may be used for verifying oxygen concentrations in gas mixtures
used in:
• Anesthesia
• Respiratory Therapy
• Neonatal Care.
1.2 Theory of Operation
The TED 200-T can be divided into two major functional groups:
• the T-7 Sensor and
• Signal Processing.
The analyzer uses Teledyne Electronics Technologies Class T-7 oxygen sensor.
The current output from the sensor is fed into the electronic signal processor, where it
is used to calculate the oxygen gas concentration and display it on the LCD screen.
The data from the sensor is compared to values set by the user, and sets off the alarms
if it exceeds those values.
1.2.1 Sensor
The T-7 oxygen sensor is a galvanic cell that is made up of a cathode and anode
immersed in electrolyte and packaged in a small plastic container. Oxygen entering
the sensor stimulates a proportional amount of electrical current between the anode,
cathode and electrolyte. This current is sent to the microprocessor, which measures
and displays it as a percentage on the LCD screen, and then compares it to the alarm
standards set by the user. If it exceeds alarm limits, the alarms are triggered.
CAUTION: The electrolyte used in the T-7 sensor is caustic. Do not try
to open the sensor assembly. Check the sensor regularly
for leaks. If the sensor is leaking, discard of it in a safe
manner. Do not try to repair it. Consult the Material Safety
Data Sheet in the Appendix for handling guidelines.
Attached to the T-7 sensor is a removable plastic diverter. This diverter is used to
facilitate the transport of gas mixtures through the sensor. The diverter, packaged
separately when shipped, is necessary when the tee adapter is used to sample gas
flowing through a tube.
The diverter is not necessary and should not be used when the sensor is placed
directly in a chamber, or when the sensor is used in confined volume monitoring, such
as incubators and inhalation tents.

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CAUTION: Remove and save the diverter when the sensor is used in
confined volume applications.
1.2.2 Signal Processing
The electrical current developed in the sensor is sent to the microprocessor for
processing. Processing includes amplification, conversion to digits, and comparison
to alarm standards. Using a microprocessor allows for easier setting of alarms, auto-
matic calibration, and self-diagnosis. When the battery runs low or the unit needs
recalibration, the TED 200-T tells you so.
The oxygen level is calculated and then displayed on the liquid crystal display
(LCD) on the front panel.
User-programmed high and low alarm setpoints are stored in random access
memory (RAM) which resides within the microprocessor. The oxygen level calculated
by the microprocessor is compared to these setpoints , and an alarm activated, if
necessary.
The audio alarm itself can be manually bypassed for a set amount of time by the
user. Pressing the ALARM SILENCE key will stop the alarm in increments of 30, 90,
and 180 seconds. The alarm can also be turned back on after silencing.

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Operations
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 Electronic Technolo-
gies, Sensor Technologies.
Note: This equipment is internally powered.
2.1 Setup
The TED 200-T is suitable for use in many medical applications. The unit can be
used on a table top or mounted on a pole using a mounting bracket (P/N B34102).
To set up and use your TED 200-T:
1. Install the batteries.
2. Install the sensor.
3. Calibrate the unit.
4. Set the alarms.
The front display touch panel is designed to insure that accidental touching or
bumping of the panel will not reset any calibrations or settings. Each button used in a
sequence must be pressed within five seconds of each other, and the CAL, ALARM
TEST and OFF keys must be pressed twice in order to activate them. The ON/OFF
key needs to be pressed once in order to turn on the TED 200-T, but must be pressed
twice to turn it off.

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Figure 2: TED 200-T rear view
Sensor cable receptacle
Battery compartment
2.1.1 Battery Installation or Replacement
Note: Four “AA” alkaline batteries must be installed in the unit before the TED
200-T will operate. Each time new batteries are installed, the display will
flash AIR CAL. The HI alarm will read 100%; the LO alarm will read 17%.
The oxygen value will be blank until the unit is calibrated in air.
Note: When new batteries are installed, typically, the unit is suitable for use
immediately after installation.
1. Turn the unit off (if it is on).
2. Open the battery compartment. Door swings open left to right.
3. Remove the battery holder and take out batteries, if any.
CAUTION: Improper installation of the batteries may result in heat dam-
age to the batteries.
Note: Use alkaline batteries only. Other types will give erroneous battery test
readings.
4. Install 4 “AA” alkaline batteries into the holder. Each battery has its own
slot. To insure proper polarity, place the bottom (flat) or negative end of the
battery in the end of the holder marked “–” (the end with the spring). Place
the top (button) or positive end of the battery in the end of the holder marked
“+”. Do this for each battery.
5. Snap the battery holder onto the red and black wired snap connector and
slide the battery holder into the compartment. Be careful not to pinch the
wires. The holder should seat firmly in the compartment.

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Figure 3: Mounting the sensor in the tee adapter
6. Close the compartment door. The front panel will now display HI ALARM
100 and LO ALARM 17 with a flashing AIR CAL.
7. To test the batteries after the unit has been calibrated: Press the BATT
TEST key once. The display should show BATTERY HRS LEFT as 999.
2.1.2 Sensor Installation or Replacement
Note: The T-7 oxygen sensor must be installed before the TED 200-T can be
operated. For sterilization procedures, see page 2.8: Sterilization.
Note: When a new sensor is installed, typically, the unit is suitable for use
immediately after installation.
CAUTION: Do not autoclave the sensor.
1. 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 AF-
FECTED AREA WITH WATER. DO NOT ATTEMPT TO OPEN
OR REPAIR THE SENSOR. LEAKING OR EXHAUSTED SEN-
SORS SHOULD BE DISPOSED OF IN ACCORDANCE WITH
LOCAL REGULATIONS. CONSULT THE MATERIAL SAFETY
DATA SHEET IN THE APPENDIX.

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2. Plug one end of the coiled cable into the telephone jack receptacle on the end
of the T-7 sensor. The jack will only fit one way, so if it will not fit, rotate it
untilitslidesineasily.
3. Plug the other end of the coiled cable into the receptacle located on the right-
hand side panel of the TED 200-T. This jack will only fit one way, so do
notforceit.
Note: If the TED 200-T is used for diffusion sampling (i.e., incubators, tents,
etc.), the plastic flow diverter must be removed from the T-7 sensor. If
the sensor is used in breathing circuits, etc, the diverter must be used as
shown in Figure 3.
2.1.3 Calibration
After installation of the batteries the display will show HI ALARM 100 and LO
ALARM 17, an AIR CAL message will flash, and the oxygen reading will be blank.
An air calibration must be performed before an oxygen reading will display.
1. Forfirsttime and routine maintenancecalibrations,makesurethat the sensor
and sensor cable have been installed correctly and that the sensor is in room
air uncontaminated with excess oxygen or other gases. For routine
calibrations, set the LO and HI alarm limits to 17 and OFF, respectively.
HI alarm set key Battery test key
Red LED alarm
Calibration key
Down key
Alarm silence key
ON/OFF key
HI & LO alarm settings
Figure 4: TED 200-T front touch panel
LCD display LO alarm set key Alarm test key
Up key

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2. If calibrating for the first time, press the CAL key once. After initial
calibration, press the CAL key twice.
CAUTION: It is very important that air (21 % oxygen) calibration be
performed every time the batteries are disconnected or
replaced in the TED 200-T. The microprocessor cannot
perform its task properly without this data.
After 10 seconds a reading of 20–22% oxygen will be displayed. CAL IN 100%
will flash for a period of 5 seconds, during which time the reading of 20–22 will con-
tinue. This is a reminder that a 100% oxygen calibration should be performed to
achieve maximum accuracy.
Note: When calibrating in 100 % oxygen, it is recommended that the plastic
flow diverter and tee adapter be installed into a flowing circuit with pure
dry oxygen flowing past the sensor assembly. An accessory calibration
assembly (P/N C53790) is available from TET Sensor Technologies for
use where breathing circuits are not normally used.
3. Place the sensor in 100% oxygen (place the sensor in a small plastic bag and
flush with pure, dry oxygen) and allow the reading to stabilize. Wait until the
reading is stable for at least 10 seconds. If the reading is other than 100, press
the CAL key twice. After 15 seconds a reading of 99–101 will display.
Note: For the specified accuracy in monitoring any oxygen level above 30–40%,
a 100% calibration must be performed after the 21% (air) calibration. DO
NOT calibrate in air subsequent to the 100% calibration, as calibrating in
air again will cancel the previous 100% calibration. The 100% calibration
may be repeated as many times as desired without affecting the air
calibration.
It is important to perform the calibration carefully and thoroughly, making certain
that uncontaminated calibration gases are used and that stable readings are achieved
before the calibration is locked in. The accuracy achievable by the monitor is only as
good as the procedure used to calibrate it.
Note: Never calibrate the unit in humidified gas, as water vapor makes the
oxygen concentration appear lower than it really is. See Appendix:
Humidity.
2.1.4 Alarms
1. To set the HI alarm: Press the SET HI ALARM key once. Within 5 seconds,
press the yellow UP or DOWN arrow keys until the screen displays the
desiredvalue.

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NOTE:The HI alarm may be defeated by setting the limit one step above 100%.
The display will show HI ALARM OFF and flash ALARM DEFEATED.
2. To set the LO alarm: Press the SET LO ALARM key once. Within 5
seconds, use the yellow UP and DOWN arrow keys to select a value. A
safety feature will not allow you to select a LO alarm value less than 17.
NOTE:The TED 200-T is designed to prevent crossing of HI/LO alarm settings. If
you try to make the LO alarm higher than the HI alarm, it will push the HI
alarm setting up as you continue to raise the LO alarm setpoint. This
also applies when attempting to set the HI alarm lower than the LO
alarm.
3. To test the alarms, press the ALARM TEST key twice. The display will
show ALARM TEST. The oxygen reading on the display will sequence to
the HI alarm value and activate the audible/visible alarm for 1-2 seconds. It
will then sequence down to the LO alarm value and activate the audible/
visiblealarmfor 1-2 seconds.
4. To override the audible alarm, press the ALARM SILENCE key:
• once for 30 seconds of silence;
• twice for 90 seconds of silence;
• three times for 180 seconds of silence;
• fourtimes todiscontinue theoverride.
The display will flash ALARM SILENCE and then count down the remaining
alarm silence time. The unit will continue monitoring and displaying the oxygen concen-
tration.
NOTE: The accuracy of the alarm Set Points of the TED 200 is the same as
that of the O2reading as these are both derived mathematically from
the A/D converter reading.
NOTE: It is highly suggested not to set low alarm below 18%.
2.2 Use
2.2.1 Procedure
Note: Prior to use, always test the batteries and alarms; check calibration, the
sensor for leaks and damage, and the alarm settings.
The TED 200-T can be used to monitor gas mixtures for oxygen in two basic
modes:
1. In breathing circuits or other instances where gases are flowing in tubing
circuits.
2. In confined volumes such as incubators or tents.

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When monitoring for oxygen in breathing circuits, the diverter must be used. The
diverter should be screwed onto the threaded front end of the T-7 sensor. A tee adapter
(either plastic, P/N A268, or metal, P/N A283) should be placed into the circuit, and the
above sensor assembly plugged into the tee adapter.
CAUTION: Check the breathing circuit for leaks. Be certain that the
circuit downstream of the sensor does not produce any
back-pressure or restriction to flow, or errors in readings will
result.
When monitoring for oxygen in confined volumes such as incubators, hoods, etc.,
the flow diverter must be removed from the T-7 sensor so that it does not interfere with
the rapid exchange of gases to and from the sensing surface of the T-7.
CAUTION: Failure to remove the diverter in these application areas will
result in a marked lowering of the response time of the sen-
sor.
The T-7 sensor can be placed or hung inside incubators, tents, etc. When it is
necessary to thread the cable through a small hole in order to gain access to the inside of
a chamber, the cable should be disconnected at the sensor, threaded through the hole,
andreconnected inside the chamber.
A calibration check may be conducted at any time to assure proper operation.
Remove the diverter and expose the sensor to room air, and verify that the reading is
20–22%. Expose the sensor to 100% oxygen (preferably using the diverter and tee
adapter in a flowing circuit) and verify that the reading is 99–101%.
2.2.2 Anesthetic Gases
2.2.2.1 Gasesthatinducereadingerror
When using the T-7 sensor in the presence of anesthetic gases such as Halothane,
the oxygen reading may fall (see the table below). The magnitude of this error will
depend upon the level of oxygen and the duration of exposure.
Theanestheticagentslisted in the following table (Halothane, Enflurane,
Isoflurane, Sevoflurane, and Desflurane) were vaporized into a stream of 30% oxygen/
70% nitrous oxide, and the resulting drops in oxygen level after an exposure of approxi-
mately two hours were noted.
Exposures in excess of two hours will produce slightly greater error. The errors
listed are typical for all oxygen sensors such as the T-7. Exposing the sensor to air or
gases that do not contain anesthetic agents for a period of time equal to or greater than
theexposureinterval will eliminate the reading error in mostcases.

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Gas or Vapor Level
(Balance: Mixture of 30% O2 / 70% N20, except where noted)
Oxygen
Gas or Vapor Test Level Reading Error *
Helium 50%, balance O20%
Nitrous Oxide 80%, balance O20%
Carbon Dioxide 10%, balance O20%
Halothane 4% <-1.5% O2
Enflurane 5% <-1.5% O2
Isoflurane 5% <-1.5% O2
Sevoflurane 5% <-1.5% O2
Desflurane 15% <-1.5% O2
* 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 200-T should not be used in the presence of flam-
mable anesthetics such as diethyl ether or cyclopropane.
2.2.2.2 Care after use in nitrous oxide
CAUTION: The T-7 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 this
is not practical, the plastic flow diverter should be removed and the sensor left in room
air. 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 Material Safety Data Sheet (MSDS) located in Chapter 4.0:
Appendices.
2.2.3 Sterilization
The T-7 sensor and interconnecting cable may be gas sterilized using low tempera-
ture ethylene oxide. A vacuum must not be drawn on the sensor during the sterilization
process.
The TED 200-T itself cannot be liquid sterilized or autoclaved. The surface of the
case may be wiped with isopropyl alcohol and allowed to air dry. In extreme cases, a
mild detergent may be used.

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2.3 Do’s and Don’ts
– DO –
• Read all of the directions before using for the first time.
• Calibrate every 8 hours or before every use.
• Visually inspect the sensor for leakage before each use.
• Use 2-point calibration every time: 21%, then 100%.
• Check the HI and LO alarm settings prior to each use.
• Testbatteriesregularly(replaceimmediatelywhenindicated).
• Keep the unit, sensor and connections dry, or on the dry side of the breathing
circuit.
• Recalibrateafterreplacingthebatteries.
• Recalibrateafterreplacingthesensor.
• Useproperlyinstalledalkalinebatteriesonly.
• Make sure the T-7 sensor is properly attached.
• Use the plastic flow diverter only when using the tee adapter.
• Remove and save the plastic flow diverter when using the unit in chamber
applications(incubators,tents,etc.)
• Perform an alarm test before each use (press the ALARM TEST key twice).
• Clean the case with isopropyl alcohol or mild detergent only.
– DON’T –
• Use the TED 200-T if you suspect any malfunction.
• Use the TED 200-T in the presence of flammable gases.
• Useanythingbutalkalinebatteries.
• Autoclave or freeze the T-7 sensor or TED 200-T unit.
• Open or try to repair a leaking or broken sensor.
• Immerse the unit or sensor in any liquid.
• Pass hot or cold gas mixtures over the sensor.
• Expose the unit to devices that produce high levels of radio, short wave,
microwave,x-ray, or highfrequencyinterference.
• Use cleaning agents or liquids in the cable receptacles or around the battery
compartment.
• Place the TED 200-T unit itself in a water vapor-saturated environment.
• Expose the LCD to excessive sunlight.
• Expose the TED 200-T to a condensing water environment such as a mist
tent.

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