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Low Fan Speed Target airflow is the face velocity the cabinet is trying to maintain
while in low fan speed mode. This should normally be set to 0.35m/sec. but may be
changed if required. The back key stores the set point and returns to the calibration
menu.
SCREEN CALIBRATION
This should only be used if the touch screen requires calibration. This is usually
indicated by touch sensitive areas of the screen not lining up with the buttons. Follow
the on-screen instructions to carry out screen calibration.