HACH LANGE RTC103 N-Module, User Manual

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Parameterization and operation
MODEL CORRECTION FACT.
This factor can be used on order 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 the this DO feed forward set point for all further
calculation
[mg/L]
NH4-N SETPOINT
Desired set point of the NH4-N concentration effluent aeration
Note: These settings are only necessary if NH4-N measurement in
effluent for feed back control is available!
[mg/L]
P FACT NH4
Proportional factor for the PID closed loop controller for the NH4-N
concentration effluent aeration.
[1/mg/L]
INTEGRAL TIME NH4
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
Derivation time for the PID closed loop controller for the NH4-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]
DO CONTROL
DERIVATIVE TIME Derivative Time of DO controller [min]
DAMPING Damping of DO control [min]
SUBST AERATION
If the DO sensor (e.g. LDO) signals a fault, the set aeration stage is
selected
[Stage]
NO. OF STAGES Number of controlled aeration stages (maximun 6) [Stage]
VFD P MIN fixed to 100% [%]
INPUTS
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.
Note: 0/4 to 20 mA input can be used either for Qreci or for Qras!
4.4.2 1-Channel RTC103 N-Module Stages (Continued)
RTC MODULES / PROGNOSYS
RTC MODULES
RTC