Using this processing type, you can control a metering pump using the
current signal as shown in the diagram above.
Everything functions according to the
‘Lower side band’
type of the pro‐
cessing.
12.2.2 Dosing direction
‘Menu / Information
è
Settings
è
Dosing direction’
The
‘Dosing direction’
menu enables you to select the pump’s dosing
direction:
n clockwise
n anti-clockwise
12.2.3 Concentration
‘Menu / Information
è
Settings
è
Concentration
è
...’
The desired mass concentration of feed chemical that will subsequently be
required in the dissolving medium (e.g. the main flow) can be entered
directly in the "Concentration" continuous display.
1. Select the operating mode.
2. Go to
‘Set up’
-
‘Concentration’
-
‘Concentration control’
and set to
‘Active’
.
3. Then set the data required for the feed chemical and dissolving
medium.
4. Set the desired concentration in the "Concentration" continuous dis‐
play.
–
The "Concentration" continuous display only
appears, if:
–
the pump is calibrated.
–
the ‘Concentration’ menu was run through in
the operating mode used.
–
and ‘Concentration control’ was switched to
‘active’ - in the operating mode being used.
–
The "Concentration" continuous display switches to
the "%" display mode at concentrations above
999.99 ppm.
–
When changing between operating modes, the
pump saves the settings for each operating mode -
provided it is connected to supply voltage.
–
If the pump is to display the concentration as a
volume concentration, enter "1.00" kg/l for the den‐
sity of the feed chemical.
12.2.3.1
‘Manual’
operating mode (settings for the
‘Concentration’
function)
‘Menu / Information
è
Settings
è
Concentration
è
Concentration control
è
Flow of main medium
è
...’
The principle of entering the concentra‐
tion:
Set up /
‘Menu’
49
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