Micro Direct MicroLab Operating Manual page 28

Calibration procedure
failed or cannot be
completed
Turbine may be
faulty
Turbine not fitted
tightly to
calibration
syringe
Calibration
syringe does not
have an
inspiratory seal
or seal is leaking
Shaft of the
syringe is being
pushed down
25
appear, ensure required icon
is selected
Repeat calibration
procedure, if problem
persists, replace turbine or
return unit for servicing
Ensure the syringe is fitted to
the turbine using an adapter
if necessary
Ensure you are using
manufacturers recommended
syringe
The syringe should be
emptied and filled with one
smooth stroke, avoid pushing
down on the shaft or banging
at the end of each maneuver