Hach-Lange RTC113 ST-Module - Manual (Page 22)

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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
thickened sludge.
The change in the specific dosing rate affects the polymer
dosing rate [L/h] in the POLYMER DOSING CONTROL module
and affects the feed flow rate in the FEED FLOW CONTROL
module.
Activation/
deactivation
CHANNEL 2 As per channel one
4.4.1 RTC113 ST-Module open and closed-loop controller (Continued)
RTC MODULES / PROGNOSYS
RTC MODULES
RTC