- 46 -
Declared dual-number noise emissions values (in accordance with ISO 4871)
Tube Size
Sound Pressure
Level (L)
Uncertainty
(K)
Sound Power
Level
Uncertainty
(K)
15 and 22 (mm) tubing
type
30.5 dB(A)
2.0 db(A)
38.5 dB(A)
2.0 dB(A)
12 (mm) tubing type
30.5 dB(A)
2.0 db(A)
38.5 dB(A)
2.0 dB(A)
Pressure accuracy
Pressure Increments: 4-20cm H
2
O (in 0.5 cm H
2
O increments)
Maximum static and dynamic pressure accuracy, according to ISO 80601-2-70:2015:
Tube Type
Static
Dynamic
<
10 cmH
2
O
Dynamic
≥
10 to 20 cmH
2
O
15 and 22 (mm) tubing type
± 0.5 cmH
2
O
± 0.5 cmH
2
O
± 1.0 cmH
2
O
12 (mm) tubing type
± 1.0 cmH
2
O
± 2.0 cmH
2
O
± 2.0 cmH
2
O
Static pressure accuracy has a measurement uncertainty of 1.31%.
Dynamic pressure accuracy has a measurement uncertainty of 2.70%.
Maximum flow rate (typical)
Tube Type
Flow
Test pressures (cmH
2
O)
4
8
12
16
20
12 (mm) tubing type
(heated or non-heated)
Average flow at the patient
connection port (l/min)
125
120
113
105
96
15 (mm) tubing type
(heated or non-heated)
Average flow at the patient
connection port (l/min)
148
142
134
125
115
22 (mm) tubing type
Average flow at the patient
connection port (l/min)
146
151
142
132
121
