Pr
o
Minent
®
Page 18
Settings
Lower/upper band:
This processing mode allows you to control a pump via an electrical signal as shown in the
diagrams below.
You may also control two pumps for different feed chemicals from a single signal (e.g. one
acid pump and one alkali pump from a pH sensor signal). The pumps must be connected
electrically in series (see wiring plan in section 6.3).
Lower band
Upper band
e.g. Alkali pump
e.g. acid pump
I [mA]
I 1
I 2
F2
F1
0
20
P1
P2
F
max
I [mA]
I 1
I 2
F1
0
20
P1
P2
F2
F
max
Fig. 21
Fig. 22
Lower band:
The symbol
appears in the LCD display. The gamma/ L will operate below I1 at F1.
Above I2, the gamma/ L ceases to operate. Between I1 and I2 the stroke rate is between F1
and F2, proportional to the signal current.
Upper band:
The signal
appears in the LCD display. The gamma/ L will cease to operate below
I1. Above I2, the gamma/ L will operate at F2. Between I1 and I2 the stroke rate between is
F1 and F2, proportional to the signal current.
Above I2 the gamma/ L will continue to operate at F2.
The smallest processable difference between I1 and I2 is 4 mA.
Error processing
In the “ER” (error) menu option you can activate an error processing function for the “curve”
mode. An error message appears for signals below 3.8 mA and the gamma/ L stops.
7.4.3
Settings for “contact” operating mode (CONTCT menu)
In addition to those settings menus described in 7.5, there is an additional CONTCT in the
overall SET menu for the “contact” operating mode.
The operating mode “contact” allows you to activate a single stroke or a series of strokes. The
strokes can be activated by a pulse or via the “external control” terminal. This operating mode is
intended to transfer input pulses into a reduction (break) or small increase in strokes.
The following versions are available:
•
Contact - identity code: external 1:1
•
Contact - identity code: external with pulse control