ProMinent DULCO flex Control Operating Instructions Manual page 50

'Menu'
Set up /
The prerequisites are that:
Procedure
Tab. 8: Possible values of adjustable variables
Adjustable variable
Flow in m 3 /h
Mass concentration in %
Mass density in kg/l
50
The "Concentration input" in
metering a substance into pipework containing a medium flowing at a con‐
'main flow' ) in such a way that it has a specific mass concen‐
stant rate (
tration in the flow.
the flowing medium has the same density as water (1 kg/l ≜ g/cm
n
the mass concentration of the feed chemical is known - see the feed
n
chemical safety data sheet (e.g. with 35% sulfuric acid: 35 %)
the density of the feed chemical is known - see the feed chemical
n
safety data sheet (e.g. with 35% sulfuric acid: 1.26 kg/l ≜ g/cm
The measurement unit for the liquid volume is set in the
n
Volume unit' menu.
è
1. Calibrate the metering pump if it is not yet calibrated - see chapter
'Set up' - 'Calibration' chapter.
2. Select
in other operating modes remain saved).
3. Select
'active' in the 'Concentration control' menu item and press the
4. Set
[Clickwheel] .
5. Set the
[Clickwheel] .
6. Set the
[Clickwheel] .
7. Set the (mass)
ð The
8. Press
ð A continuous display appears.
9. Turn the
play (ppm or %).
10. Enter the required mass concentration of feed chemical in the main
flow by pressing and turning the
Lower value
0000.1
000.01
0.50
'Manual' operating mode is intended for
CAUTION!
Danger of concentrations being too high
The metering pump can continue to meter if the flow falls
or stops entirely.
– Take system-based precautions to prevent the
metering pump from continuing to meter in these cir‐
cumstances.
CAUTION!
The precision of the concentration is strongly dependent
on:
– the precision of the metering pump calibration.
– the precision of the inputs.
'Manual' - 'Operating mode' (settings potentially configured
'Concentration' in the 'Set up' menu.
'Main medium flow' (in the pipework) and then press the
'Feed chemical mass concentration' and press the
'Feed chemical density' and press the [Clickwheel] .
'Concentration' menu appears.
[Menu] .
[Clickwheel] to go to the "Concentration" continuous dis‐
[Clickwheel] .
Upper value
9999.9
100.00
2.00
3 )
)
3
'System
Increment
0000.1
000.01
0.01