Parameterization and operation – Hach-Lange RTC112 SD-Module User Manual
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Parameterization and operation
PRESELECT PROG.
CHANNEL 1
POLYMER DOSING
CONTROL
Based on the feed flow rate [m³/h] and measured TSS
concentration [g/L] from the influent, the polymer dosing rate
[L/h] is calculated such that it corresponds to the target specific
polymer dosing rate [g/kg].
Activation/
deactivation
FEED FLOW CONTROL
Based on the measured TSS concentration [g/L] and a fixed
polymer dosing rate [L/h], the feed flow [m
3
/h] is calculated such
that it corresponds to the specific polymer dosing rate [g/kg].
Activation/
deactivation
CLOSED-LOOP EFFLUENT
CONTROL
If activated, the specific polymer dosing rate FACTOR
POLYMER DOSING is adjusted based on the difference
between the target and actual TSS concentration in the
dewatered sludge.
The change in the specific dosing rate affects the polymer
dosing rate [L/h] in the POLYMER DOSING CONTROL module
or affects the feed flow rate in the FEED FLOW CONTROL
module.
Activation/
deactivation
CLOSED-LOOP FILTRATE
CONTROL
If activated, the specific polymer dosing rate FACTOR
POLYMER DOSING is adjusted based on the difference
between the target and actual TSS concentration in the
filtrate/centrate.
The change in the specific dosing rate affects the polymer
dosing rate [L/h] in the POLYMER DOSING CONTROL module
or affects the feed flow rate in the FEED FLOW CONTROL
module.
Note: Activation and deactivation of CLOSED-LOOP
EFFLUENT CONTROL and CLOSED-LOOP FILTRATE
CONTROL have to be prepared by executing the relevant
*bat-files on the RTC CF-card (see
).
Activation/
deactivation
CHANNEL 2
As per channel one
CONTROL PARAMETER
CHANNEL 1
FACTOR POLYMER
DOSING
Required specific polymer dosing [g/kg]. This parameter
determines how many grams of polymer per kilogram of TSS
are fed by the machine.
g/kg
POLYMER CONCEN-
TRATION
Polymer concentration [g/L] fed via the polymer pump.
g/L
MANUAL POLYMER
DOSING
The RTC outputs the polymer flow rate [L/h] if
•
FEED FLOW CONTROL is activated
•
No open-loop control mode (see above) is activated
•
The TSS measurement from the influent reports an error, or
•
The flow measurement from the influent reports an error.
L/h
MANUAL FEED FLOW
The RTC outputs the feed flow rate [m³/h] if
•
POLYMER DOSING CONTROL is activated
•
No open-loop control mode (see above) is activated
•
The TSS measurement from the influent reports an error, or
•
The flow measurement from the influent reports an error
m³/h
4.4.1
RTC112 SD-Module open and closed-loop controller (Continued)
RTC MODULES / PROGNOSYS
RTC MODULES
RTC