Hach-Lange RTC103 N-Module - Manual (Page 34)

34
Parameterization and operation
MODEL CORRECTION FACT.
This factor can be used to fine tune the DO concentration calculated
by the model (feed forward part of the N-RTC).
SUBSTIT. DO FOR MODEL
If there is a failure in any of the input signals (NH4-N, TSS, Flow) the
N-RTC will apply this DO feed forward set point for all further
calculations.
[mg/L]
NH4-N SETPOINT Desired set point of the NH4-N concentration effluent aeration [mg/L]
P FACT NH4
Note: These settings are only necessary if NH
4
-N measurement in
effluent for feed back control is available!
Proportional factor for the PID closed loop controller for the NH4-N
concentration effluent aeration.
[1/mg/L]
INTEGRAL TIME NH4
Note: These settings are only necessary if NH
4
-N measurement in
effluent for feed back control is available!
Integral time for the PID closed loop controller for the NH4-N
concentration in the thickened sludge.
Note: INTEGRAL TIME NH4 is set to “0” to deactivate the integral
part of the PID controller.
[min]
DERIVATIVE TIME NH4
Note: These settings are only necessary if NH
4
-N measurement in
effluent for feed back control is available!
Derivation time for the PID closed loop controller for the NH
4
-N
concentration effluent aeration
Note: DERIVATIVE TIME NH4 is set to “0” to deactivate the
derivative part of the PID controller.
[min]
LIMITS
MIN DO
If a calculated DO set point is lower than the MIN DO value, the DO
set point is set to that value
[mg/L]
MAX DO
If a calculated DO set point is higher than the MIN DO value, the DO
set point is set to that value
[mg/L]
SMOOTHING Smoothing on the calculated DO set point [min]
INPUTS
CHANNEL 1
MIN INFLOW
Minimum flow rate of influent according to measurement signal
corresponding to 0/4mA
[L/s]
MAX INFLOW
Maximum flow rate of influent according to measurement signal
corresponding to 20mA
[L/s]
0/4 to 20 mA
Transfer range of 0/4 to 20 mA current loop as set in connected flow
measuring instrument.
4.5.1 2-Channel RTC103 N-Module (Continued)
RTC MODULES / PROGNOSYS
RTC MODULES
RTC