The installation height (H) must be set NO less than (≧) the measured
distance (D) value. If H is less than D, then the symbol in the left side
will keep flashing, except the distance value, the instantaneous flow
rate and level value and the output current will not change.
The BUFM660 series can provide 6 relays which may be used for
control purposes. These relays are for light duty and should be used as
signal relays only, with control functions being performed by external
control relays.