Patient Monitor User Manual Product Specification
- 265 -
Compensations
Automatic compensation for pressure and temperature.
Manual compensation for broadening effects on CO
2
.
Calibration
No span calibration is required.
Warm-up time
< 10 seconds (Concentrations reported and full accuracy)
CO
2
rise time at 50sml/min
sample flow
≤
200 ms (Measured according to EN ISO 80601-2-55.)
NomoLine ISA CO
2
system
response time
< 3 seconds
☆
AwRR
0 rpm to 150 rpm
☆
AwRR Accuracy
±
1 rpm
☆
Accuracy- Standard
Conditions
Gas Range
Accuracy
CO
2
(0 to 15) vol%
±(0.2 vol% + 2% of reading)
(15 to 25) vol%
Unspecified
The accuracy specifications above are valid for dry single gases at 22 ± 5 °C and 1013 ± 40
hPa.
☆
Accuracy- All Conditions
CO
2
±(0.3 kPa + 4% of reading)
The accuracy specification above is valid for all specified environmental conditions except for
interference specified in Section
Effects From Water Vapor Partial Pressure On Gas Readings
and Section
Interfering Gas Effects
.
Effects from Water Vapor Partial Pressure on Gas Readings:
When the breathing gas flows through the sampling line, the gas temperature will adapt to the
ambient temperature before reaching the gas analyzer. The CO
2
measurement will always show
the actual partial pressure at the current humidity level in the gas sample. As the NomoLine
sampling line removes all condensed water, no water will reach NomoLine ISA CO
2
system
However at an ambient temperature of 37
°
C
and a breathing gas with a relative humidity of 95%
the CO
2
reading will typically be 6% lower than corresponding partial pressure after removal of
all water.
Interfering Gas Effects:
Gas
Gas Level
Effect on CO
2
N
2
O
1)
60
vol%
–
2)
HAL
1)
4
vol%
–
3)
ENF, ISO, SEV
1)
5 vol%
+8% of reading
4)
DES
1)
15 vol%
+12% of reading
4)
Xe (Xenon)
1)
80
vol%
−
10% of reading
4)
He (Helium)
1)
50
vol%
−
6% of reading
4)
