0
1
t
0
1
t
B.1
(A.2)
P_DFI_0020_SW
V
t
1/ K
0
1
t
B.2
Fig. 17: Appearance of the pulses depending on the flow volume V for:
(A.2)
‘Pulse width’ - ‘variable’ f less than 10 Hz
B.1
‘Pulse width’ - ‘constant’ = 1 - “Normal mode”
B.2
‘Pulse width’ - ‘constant’ = 1.2 - with fault behaviour.
Fault behaviour
If the flow Q with
‘Pulse width’ - ‘constant’ is so high that the DulcoFlow
®
would have to make the
pauses smaller than the pulse width (or if the DFMa had to push a pulse to X =
‘fixed width’ due to
the limit of the maximum possible frequency - see B.2 in the above diagram), then it signals an error
and only emits a constant frequency signal with the resulting (maximum possible) frequency f
max
during this time:
Set up
36