Patient monitor User’s manual
23
more than two agents are present, an alarm will be set.
Interfering gas and vapor effects
If the concentration of the various gases is below the following level, there will be
negligible interference for measurement under the specification above.
ISA CO
2
, ISA AX+ sensor:
Gas or vapor
Gas level Effect (CO
2
)
Effect
(Agents)
Effect
(N
O)
N
2
O 60% — — —
HAL 4% — — —
ENF, ISO, SEV 5% — — —
DES 15% —
—
—
Xe (Xenon) 80% -10% of reading
—
—
He (Helium) 50% -6% of reading
— —
Metered dose inhaler
Propellants
Not for use with metered dose inhaler propellants
C
2
H
5
OH (Ethanol) 0.3%
— —
—
C
H
OH (Isopropanol)
0.5%
— —
—
CH
3
COCH
3
(Acetone)
1%
— — —
CH
4
(Methane) 3%
— —
—
CO (Carbon
monoxide)
1%
— —
—
NO (Nitrogen
monoxide)
0.02%
— —
—
O
2
100%
— —
—
Note 1: Interference at indicated gas level. For example, 50 % Helium typically decreases the
CO2 readings by 6%. This means that if measuring on a mixture containing 5.0 % CO2 and 50 %
Helium, the actual measured CO2 concentration will typically be (1-0.06) * 5.0 % = 4.7 % CO2.