Peak expiratory flow (PEF), 25% flow of the FVC (FEF25), 75% flow of the FVC (FEF75) and average flow be-
tween 25% and 75% of the FVC (FEF2575) can be measured. Besides, the testee condition can be shown by
the ratio of the measured value and the predicted value.
• Flow rate-volume chart, volume-time chart display.
• Data memory, delete, upload and review.
• Trend chart display.
• Calibration.
• Information prompts when volume or flow goes beyond the limits.
• Automatic power off when there is no operation in one minute.
• Rechargeable lithium battery and with charging tips.
• Battery power display.
4.2 Main Parameters
Volume Range: 10L
Flow range: 0 L/s~16 L/s
Volume accuracy: ±3% or 0.05L (whichever is greater)
Flow accuracy: ±5% or 0.2L/s (whichever is greater)
Working current: 60mA
Power supply: DC3.7V 820mAh rechargeable lithium battery
Classification:
EMC: Group I Class B.
According to the MDD 93/42, the classification of this medical device: IIa.
The type of protection against electroshock: Internally powered equipment.
The degree of protection against electroshock: Type BF applied part .
International Protection: IPX0.
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