Teledyne TED-60 - Medical application oxygen monitor - Manual (Page 13)

Operations 2 Operations 2 Operations 2 Operations 2 Operations 2
2-5 Teledyne Analytical Instruments
Gas or Vapor Level
(Balance: Mixture of 30% O
2
/ 70% N
2
0, except where noted)
Oxygen
Gas or Vapor Test Level Reading Error
Helium 50%, balance O
2
0%
Nitrous Oxide 80%, balance O
2
0%
Carbon Dioxide 10%, balance O
2
0%
Halothane 4%
<
-1.5% O
2
*
Enflurane 5%
<
-1.5% O
2
*
Isoflurane 5%
<
-1.5% O
2
*
Sevoflurane 5%
<
-1.5% O
2
*
Desflurane 15%
<
-1.5% O
2
*
* 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 60T should not be used in the presence of flammable anesthetics CAUTION: The TED 60T should not be used in the presence of flammable anesthetics CAUTION: The TED 60T should not be used in the presence of flammable anesthetics CAUTION: The TED 60T should not be used in the presence of flammable anesthetics CAUTION: The TED 60T should not be used in the presence of flammable anesthetics
such as diethyl ether or cyclopropane. such as diethyl ether or cyclopropane. such as diethyl ether or cyclopropane. such as diethyl ether or cyclopropane. such as diethyl ether or cyclopropane.
As with all galvanic-type oxygen sensors, the T-7 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 contin-
ues 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 the Appendix.
Pressure Pressure Pressure Pressure Pressure
Virtually all oxygen analyzers 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 calibration and
use. This is why it is important to calibrate the TED 60T oxygen sensor at regular
intervals. It is recommended that the unit be calibrated prior to each use or every
It is recommended that the unit be calibrated prior to each use or every It is recommended that the unit be calibrated prior to each use or every It is recommended that the unit be calibrated prior to each use or every It is recommended that the unit be calibrated prior to each use or every
8 hours. 8 hours. 8 hours. 8 hours. 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, as is the T-7). In
reality, the percentage of oxygen is not changing; it is the total pressure that is increas-
ing, producing a corresponding increase in the partial pressure of oxygen. A hundred-