5. Select
‘Concentration’
in the
‘Set up’
menu.
6. Set
‘active’
in the
‘Concentration control’
menu item and press the
[Clickwheel]
.
7. Set the
‘Max.throughput main medium’
(in the pipework) and press
the
[Clickwheel]
. (It is then assigned to the current value of 20 mA.)
8. Set the (mass)
‘Feed chemical concentration’
and press the
[Clickwheel]
.
9. Set the (mass)
‘Feed chemical density’
and press the
[Clickwheel]
.
ð
The
‘Concentration’
menu appears.
10.
Press
[Menu]
.
ð
A continuous display appears.
11. Turn the
[Clickwheel]
to go to the "Concentration" continuous dis‐
play (ppm or %).
12. You can enter the desired mass concentration using the
[Clickwheel]
.
CAUTION!
– Note the decimal point.
–
The mass concentration is affected by
changes to the capacity.
– The pump limits the upper value for the mass
concentration, because otherwise the incre‐
mental jumps when adjusting would be unac‐
ceptably large.
The least significant figures of the value in the
continuous display cannot be changed at will
using the [Arrow keys], rather only in incremental
jumps resulting from the input data.
If necessary, change the capacity and adjust the
concentration; as you do this, the pump compen‐
sates via the speed.
Tab. 11: Possible values of adjustable variables
Adjustable variable Lower value Upper value Increment
Max. flow in m
3
/h
0000.1 9999.9 0000.1
Mass concentration in % 000.01 100.00 000.01
Mass density in kg/l 0.50 2.00 0.01
12.2.4 Calibrate
‘Menu / Information
è
Settings
è
Calibration
è
...’
Accuracy of calibration
Normally the pump does not have to be calibrated.
However, the pump can be calibrated if viscous feed
chemicals are used or extremely high accuracy is
required.
Set up /
‘Menu’
54
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