Operating instructions

Continuous
display
B0086
Fig. 30
You can select three types of current signal processing:
n
“0 - 20 mA” :
– At 0 mA the pump is stationary.
– At 20 mA the pump works at the maximum stroke rate.
– Between these values, the stroke rate is proportional to the cur‐
rent signal.
n
“4 - 20 mA” :
– At 4 mA the pump is stationary.
– At 20 mA the pump works at the maximum stroke rate.
– Between these values, the stroke rate is proportional to the cur‐
rent signal.
– For current signals less than 3.8 mA a fault message appears and
the pump stops (e.g. if a cable has broken).
n
“Curve” : Under the “Curve” processing type, you can freely program
the pump behaviour. There are three options:
– Line
– Lower sideband
– Upper sideband
Continuous
display
B0087
Fig. 31
The symbol
appears on the LCD screen. You can enter any stroke
rate- behaviour of the pump proportional to the current signal. For this pur‐
pose, enter any two points P1 (I1, F1) and P2 (I2, F2) (F1 is the stroke rate
at which the pump is to operate at current I1); this defines a straight line
and thus the behaviour is specified:
Line
Adjustment
41