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9
UK
Depending on the setting of the counting method [FPro] totalling of the volumetric
flow quantity takes into account the flow in negative direction of flow (– +) or does
not take it into account (0+)�
+ Q
0
– Q
t
Q
V
FPro =
– +
0
+ Q
– Q
t
Q
V
FPro =
0 +
1
2
Fig� 1: Taking account of the volumetric flow direction when totalling the consumed quantity
+ Q = volumetric flow quantity in positive direction
- Q = volumetric flow quantity in negative direction
V = volumetric flow quantity absolute (= sum of negative and positive volumetric flow)
1
Volumetric flow changes to negative direction
2
Volumetric flow changes to positive direction
When the volumetric flow direction is changed a minimum volumetric flow quantity
is taken into account: - LFC in negative direction; + LFC in positive direction�
4.3.2 Consumed quantity monitoring via pulse output
OUT 1 issues a pulse signal each time the set volumetric flow quantity has been
reached