ADS Environmental Services FlowShark Pulse QR 775004 A1 - Manual (Page 108)

8-18 ADS FlowShark Pulse O&M Manual
Low-Flow Volume Q
min.
This parameter exists to minimize the impact of slow-moving flows or noticeable
increases in volume. It primarily is used to measure overflow volumes in structures
that remain flooded by incoming flow.
Q
min
: readings lower than this value will be set to 0. The user can only set positive
values, and each value will be considered an absolute value (i.e., very small positive
or negative flows will be set to zero).
V
min
: low-flow volumes in applications with large profiles and depth levels can be
suppressed using this parameter. Lower velocity fluctuations within longer periods of
time may cause apparently large volume fluctuations which cannot be ignored using
the Q
min
value function.
Flow velocities below this value will be set to 0, which will ensure a calculated
volume of 0.
The user only can set positive values, and each value will be considered an absolute
value (i.e., very small positive or negative velocities will be set to zero).
Both low-flow suppression setting options have an OR logic relationship to each
other.
Figure 8-26 Selecting low-flow volumes
Suppressing low-flow volumes does not serve as an offset, but as a
limitation.