A - 19
A.8.7 CO
2
Specifications
Measurement range 30 to300 bpm
Resolution 1 bpm
Accuracy ±3bpm or ±3%, whichever is greater
Standard Meet the standard of ISO 80601-2-55
Measurement range 0 to 150 mmHg
Accuracy
1
Full accuracy mode:
0 to 40 mmHg:
41 to 76 mmHg:
77 to 99 mmHg:
100 to 150 mmHg:
±2 mmHg
±5% of reading
±10% of reading
±(3 mmHg+8% of reading)
Accuracy drift Meets the requirement for measurement accuracy within 6 hours.
Resolution 1mmHg
Sample flowrate tolerance ±15% or ±15 ml/min, whichever is greater.
Sart-up time 20 s (typical), 90 s (maximum)
Sample flowrate 50 ml/min
Rise time ≤200 ms @ 50 ml/min (measured with a CO
2
adapter and sampling line)
≤250 ms @ 50 ml/min (measured with a standard sampling line)
≤280 ms @ 50 ml/min (measured with a long sampling line)
Response time ≤5.0 s@50ml/min (measured with a CO
2
adapter and sampling line)
≤5.0 s@50ml/min (measured with a standard sampling line)
≤6.5 s@50ml/min (measured with a long sampling line)
Apnea time 10 s, 15 s, 20 s, 25 s, 30 s, 35 s, 40 s
awRR
awRR measurement range 0 to 150 rpm
awRR accuracy ≤60 rpm:
61 to 150 rpm:
±1 rpm
±2 rpm
awRR resolution 1 rpm
Effect of interference gases on CO
2
measurements
Gas Concentration Quantitative effect
2
O
2
≤100% ±1 mmHg
N
2
O≤60%
Hal ≤4%
Sev ≤5%
Iso ≤5%
Enf ≤5%
Des ≤15% ±2 mmHg
1
Inaccuracy specifications are affected by the breath rate and I: E change. The EtCO
2
accuracy is within specification for
breath rate ≤ 60rpm and I/E ratio ≤1:1, or breath rate ≤30rpm and I/E ratio ≤ 2:1.
2
means an extra error should be added in case of gas interference when CO
2
measurements are performed between 0-
40mmHg.