31
Symbol
Meanings
Charging indicator.
Turn the turbine clockwise to unlock
Turn the turbine counterclockwise to lock
Chapter 10
PARAMETER INTRODUCTION
Parameter
FVC
FEV1
PEF
FEV1%
FEF25
FEF2575
FEF75
Measured parameters
Description
Forced vital capacity
Forced Expired Volume in one second
Peak expiratory flow
FEV1/FVC×100
25% flow of the FVC
Average flow between 25% and 75% of the FVC
75% flow of the FVC
Symbol
Meanings
Covering Protection rate
Keep away from sunlight
Unit
L
L
L/s
%
L/s
L/s
L/s