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English
Technical specifications
Pressure–flow
curve
The mask contains passive venting to protect against
rebreathing. As a result of manufacturing variations, the
vent flow rate may vary.
Dead space
information
Physical dead space is the empty volume of the mask
to the end of the swivel. Using the large cushions it is
106 mL.
Therapy pressure
4 to 20 cm H
2
O
Resistance
Drop in pressure measured (nominal)
at 50 L/min: 0.4 cm H
2
O
at 100 L/min: 1.4 cm H
2
O
Sound
DECLARED DUAL NUMBERED NOISE EMISSION
VALUES IN ACCORDANCE WITH ISO 4871
The A weighted sound power level of the mask is 25
dBA, with uncertainty 3 dBA.
The A-weighted sound pressure level of the mask at a
distance of 1m is 17 dBA, with uncertainty 3 dBA.
Environmental
conditions
Operating temperature: +5°C to +40°C
Operating humidity: 15% to 95% relative humidity
non-condensing
Storage and transport temperature: -20°C to +60°C
Storage and transport humidity: up to 95% relative
humidity non-condensing
Gross dimensions
Large: 415 mm (H) x 94 mm (W) x 45mm (D)
Mask fully assembled with short tube assembly – no
headgear.
0
10
20
30
40
50
60
4
6
8
10
12
14
16
18
20
Mask pressure (cmH
2
O)
V
ent fl
ow rate (L/min)
Pressure
(cm H
2
O
)
Flow
(L/min)
4
20
8
29
12
37
16
43
20
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608320 book.indb 5
28/10/2011 11:00:37 AM
