Hach-Lange RTC113 ST-Module - Manual (Page 24)

24
Parameterization and operation
INPUT/OUTPUT LIMITS
CHANNEL 1
FEED FLOW LOW
Feed flow rate input signals below this value [m 3 /h] are set to
this value (to avoid low flow peaks).
m 3 /h
FEED FLOW HIGH
Feed flow rate input signals above this value [m 3 /h] are set to
this value (to avoid high flow peaks).
m 3 /h
FEED FLOW SMOOTHING
Feed flow measurement values are smoothed in line with this
parameter.
min
LIMIT TSS IN LOW
TSS measurement values from the influent that are below this
value [g/L] are set to this value (to avoid low peaks).
g/L
LIMIT MAX TSS IN HIGH
TSS measurement values from the influent that are above this
value [g/L] are set to this value (to avoid high peaks).
g/L
TSS IN SMOOTHING
The TSS measurement values from the influent are smoothed in
line with this parameter.
min
LIMIT TSS OUT LOW
The TSS values of the thickened sludge that are below this
value [g/L] are set to this value (to avoid low peaks).
g/L
LIMIT TSS OUT HIGH
The TSS values of the thickened sludge that are above this
value [g/L] are set to this value (to avoid high peaks).
g/L
TSS OUT SMOOTHING
The TSS measurement values from the effluent are smoothed in
line with this parameter.
min
POLYMER DOSING
MINIMUM
When FEED FLOW CONTROL is activated, measurement
values for the polymer dosing rate that are below this value
[m³/h] are set to this value (to avoid low peaks in the dosing
flow).
L/h
POLYMER DOSING
MAXIMUM
Any RTC calculation above this value [g/L] is set to this value
and delivered to the polymer pump.
When FEED FLOW CONTROL is activated, measurement
values for the polymer dosing rate that are above this value
[m³/h] are set to this value (to avoid high peaks in the dosing
flow).
L/h
CHANNEL 2 As per channel one
INPUTS
CHANNEL 1
MIN FEED FLOW
Minimum flow rate [m³/h] from the influent in accordance with
the 0/4 mA measurement signal.
m³/h
MAX FEED FLOW
Maximum flow rate [m³/h] from the influent in accordance with
the 20 mA measurement signal.
m³/h
0/4...20mA
Transfer range of 0/4 to 20 mA current loop (as set in connected
flow measuring instrument).
MIN POLYMER FLOW
Minimum polymer dosing in [L/h] in accordance with the 0/4 mA
measurement signal.
L/h
MAX POLYMER FLOW
Maximum polymer dosing in [L/h] in accordance with the 20 mA
measurement signal.
L/h
0/4...20mA
Transfer range of 0/4 to 20 mA current loop (as set on
connected flow measuring instrument).
CHANNEL 2 As per channel one
4.4.1 RTC113 ST-Module open and closed-loop controller (Continued)
RTC MODULES / PROGNOSYS
RTC MODULES
RTC