SU2020 SU2021 SU2621 SU8020 SU8021 SU8621 SU9020 SU9021
Ultrasonic flow meter
40
4. Reset via overflow:
u
Select [Parameter] > [Totaliser].
u
Select [rTox] and set [OFF].
w
The totaliser is reset as soon as the maximum display range is exceeded.
10.4.10 Counting method of the totalisers
The totalisers Vol.1 and Vol.2 take account of the flow direction when totalising the consumed
quantity. The following counting methods can be defined via the parameter [FProx]:
[FProx]
Counting method
0+
Negative volumetric flow values (against the marked flow direction) are not taken into account for
totalling.
-0
Positive volumetric flow values (corresponding to the marked flow direction) are not taken into ac-
count for totalling.
-+
Negative flow values are subtracted from the consumed quantity.
++
All volumetric flow values are totalled irrespective of the volumetric flow direction.
Tab. 1: Counting method of the totalisers
The counting method of Vol.L cannot be set. The lifetime totaliser totals all volumetric flow quantities
irrespective of the flow direction.
+ Q
0
– Q
t
Q
V
FPro1 / FPro2 =
– +
0
+ Q
– Q
t
Q
V
FPro1 / FPro2 =
0 +
0
+ Q
– Q
t
Q
V
FPro1 / FPro2 =
+ +
1
2
0
+ Q
– Q
t
Q
V
FPro1 / FPro2 =
– 0
Fig. 25: 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. See
