English (US)
30
15.4.9 Constant level
The pump maintains a constant level, independently of the flow
rate. See fig. 49.
Fig. 49 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. 50.
The type of level control function depends on the setting of the
built-in controller. See section 15.13 Controller settings.
Fig. 50 Constant level
15.4.10 Constant other value
Any other value is kept constant.
15.4.11 Constant curve
You can set the pump to operate according to a constant curve,
like an uncontrolled pump. See fig. 51.
You can set the desired speed in % of maximum speed in the
range from 25 to 100 %.
Fig. 51 Constant curve
Fig. 52 Power and pressure limitations influencing the max.
curve
Pump variant Constant level
TPE3 (D) -
TPE2 (D) ●
TM05 7941 1613
Examples
• One external level sensor.
– emptying function.
• One external level sensor.
– filling function.
Pump variant Constant other value
TPE3 (D) -
TPE2 (D) ●
Pump variant Constant curve
TPE3 (D) -
TPE2 (D) ●
TM05 7957 1713
Depending on the system characteristic and the
duty point, the 100 % setting may be slightly
smaller than the pump's actual maximum curve
even though the display shows 100 %. This is due
to power and pressure limitations built into the
pump. The deviation varies according to pump
type and pressure loss in the pipes.
TM05 7913 1613
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