User's Manual

Figure 18 SVC measurement result interface

6.6.2 Operation steps

1) Connect the mouthpiece to the mouth, wrap the mouthpiece tightly with your lips, and

clamp the nose clip to ensure that the mouth and nose do not leak. If some patients

cannot guarantee that the corners of the mouth will not leak air, a special mouthpiece

with lip and tooth cover can be added.

Caution:

The user purchases a detachable mouthpiece and a disposable pulmonary function

meter filter, which must be a legally marketed product registered by the FDA.

Mouthpiece specifications: inner diameter 30mm, outer diameter 32-34mm, height

50mm-120mm.

Specification of disposable pulmonary function meter filter: inner diameter 1=30mm.

2) Clamp the nose clip, connect the mouthpiece, and breathe calmly for 4-5 times. After