Re-activation delay is the time that has to pass when a true
overflow has ceased before an overflow becomes a new true
overflow.
If a new true overflow (> activation delay) occurs before the re-
activation delay has expired, the overflow is added to the first true
overflow.
If the re-activation delay has expired and a new true overflow
(>activation delay) occurs, it is counted as a new true overflow.
Overflows are logged in terms of both number and volume. In the
example in the figure below, the re-activation delay is set to one
hour and 30 minutes.
The calculation of overflow is based on up to ten reference points.
Level and flow rate must be calculated and entered by the user. If
only a few reference points are entered, linear calculation is used to
estimate the overflow. See example.
Path:
Settings > Advanced functions > Overflow
4-2-13_OVERFLOW_GROUP_162
Overflow reference points
When the overflow switch is activated, the actual level (measured
by the analog level sensor) is set to be used as a "zero" reference.
The zero reference is used to calculate the level in the overflow
channel.
Channel level = actual level - zero reference.
All pumps are running, the level is increasing, and at reference
point 0, the actual level is set as zero reference. The level still
increases to reference point 1. The level in the channel is calculated
by the advanced overflow calculation based on the reference point.
0
1
7
10
4
0
1
7
10
4
TM053487
Reference points for overflow calculation
Example 1
The user has entered these values:
Reference point 1:
•
1 cm
•
1 m
3
/h.
Reference point 2:
•
10 cm
•
10 m
3
/h.
If the measured level in the overflow channel is 5 cm, the calculated
overflow is 5 m
3
/h. At 15 cm, the overflow is 15 m
3
/h.
Example 2
The user has entered these values:
Reference point 1:
•
1 cm
•
1 m
3
/h.
Reference point 2:
•
10 cm
•
10 m
3
/h.
Reference point 3:
•
20 cm
•
15 m
3
/h.
If the measured level in the overflow channel is 5 cm,
the calculated overflow is 5 m
3
/h. At 15 cm, the overflow is 12.5
m
3
/h.
The function is not possible if the system already consists of five
float switches.
If the system consists of five float switches, the high-level float
switch must be configured as overflow switch.
Related information
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