Portable Oxygen Analyzer Service Manual
Teledyne Analytical Instruments 35
oxygen / 70% nitrous oxide, and the resulting drops in oxygen level after an
exposure of approximately two hours were noted.
Exposures in excess of two hours may produce slightly greater errors. The
errors listed are typical for all oxygen sensors such as the R17MED. Exposing the
sensor to air or gases that do not contain anesthetic agents for a period of time
equal to or greater than the exposure interval will eliminate the reading error in
most cases.
Table 3-1: 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% < 1.5% 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 AX300-I SHOULD NOT BE USED IN THE PRESENCE OF
FLAMMABLE ANESTHETICS SUCH AS DIETHYL ETHER OR
CYCLOPROPANE.
CAUTION: THE AX300-I, OXYGEN SENSOR AND ASSOCIATED
HARDWARE ARE NON-STERILE DEVICES. DO NOT
AUTOCLAVE THE INSTRUMENT OR SENSOR, AS THIS WILL
DAMAGE THE EQUIPMENT.