English (GB)
32
14.5.9 Constant level
The pump maintains a constant level, independently of the flow
rate. See fig.
Fig. 50
Constant level
This control mode requires an external level sensor.
The pump can control the level in a tank in two ways:
• As an emptying function where the pump draws the liquid from
the tank.
• As a filling function where the pump pumps the liquid into the
tank.
See fig.
The type of level control function depends on the setting of the
built-in controller. See section
.
Fig. 51
Constant level
Controller settings
For recommended controller settings, see section
14.15 Controller (Controller settings)
.
14.5.10 Constant other value
Any other value is kept constant.
Use this control mode if you want to control a value which is not
available in the "Control mode" menu. Connect a sensor
measuring the controlled value to one of the analog inputs of the
pump. The controlled value will be shown in percentage of sensor
range.
14.5.11 Constant curve
You can set the pump to operate according to a constant curve,
like an uncontrolled pump. See fig.
.
You can set the desired speed in % of maximum speed in the
range from 13 to 100 %.
Fig. 52
Constant curve
Fig. 53
Power and pressure limitations influencing the max.
curve
Controller settings
For recommended controller settings, see section
14.15 Controller (Controller settings)
Pump variant
Constant level
TPE3, TPE3 D
-
TPE2, TPE2 D
●
T
M
05
79
41
16
13
Examples
• One external level sensor.
– emptying function.
• One external level sensor.
– filling function.
H
Q
L
L
Pump variant
Constant other value
TPE3, TPE3 D
-
TPE2, TPE2 D
●
Pump variant
Constant curve
TPE3, TPE3 D
●
TPE2, TPE2 D
●
TM
05
7
957
17
13
Note
Depending on the system characteristic and the duty
point, the 100 % setting may be slightly smaller than
the actual maximum curve of the pump even though
the display shows 100 %. This is due to the power
and pressure limitations built into the pump. The
deviation varies according to pump type and
pressure loss in the pipes.
T
M
05
79
13
16
13
H
Q
H [%]
Q [m
3
/h]
80 %
100 %
Limited maximum curve
