Measurement Specifications 31 Installation and Specifications
319
Mainstream and Sidestream CO
2
Humidity Correction Factor
Either BTPS or ATPD can be selected as the humidity correction factor for the CO
2
readings. The
formula for the correction calculation is:
Where p = partial pressure, P
abs
= absolute pressure, and P
H2O
= 42 mmHg @35°C and 100% RH.
awRR Range 2 to 150 rpm
Accuracy
±1 rpm
Warm-up Time 2 minutes with CO
2
transducer attached for full accuracy specification
Response Time Less than 60 ms (with adult or infant reusable or disposable adapter)
Sidestream CO
2
Performance Specifications
CO
2
Range 0 to 150 mmHg (0 to 20.0 kPa)
Accuracy after 2 minutes warmup:
For values between 0 and 40 mmHg: ±2.0 mmHg (±0.29 kPa)
For values from 41 to 70 mmHg: ±5 % of reading
For values from 71 to 100 mmHg: ±8 % of reading
For values from 101 to 150 mmHg: ±10 % of reading
At respiration rates above 80 rpm, all ranges are ±12 % of actual. The
specifications are valid for gas mixtures of CO
2
, balance N
2
, dry gas at
760 mmHg within specified operating temperature range.
Resolution Numeric: 1.0 mmHg (0.1 kPa)
Wave: 0.1 mmHg (0.01 kPa)
Stability:
Short term drift
Long term drift
±0.8 mmHg over four hours
Accuracy specification will be maintained over a 120 hour period
awRR Range 2 to 150 rpm
Accuracy ±1 rpm
Warm-up Time 2 minutes with CO
2
sensor attached for full accuracy specification
Sample Flow Rate 50 ±10 ml/minute
Total System Response Time 3seconds
Operating Temperature 0 to 40°C (32 to 100°F)
CO
2
Alarm
Specifications
Range Adjustment Delay
etCO
2
High 20 to 95 mmHg (2 to 13 kPa) 1 mmHg (0.1 kPa) less than 14 seconds
etCO
2
Low 10 to 90 mmHg (1 to 12 kPa)
Mainstream CO
2
Performance Specifications
P
ATPD
P
BTPS
=
P
abs
P
abs
P
H2O
–
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