Hach-Lange RTC103 N-Module - Manual (Page 30)

30
Parameterization and operation
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]
DO CONTROLL
P GAIN DO
Proportional factor for the PD closed loop controller for the DO
concentrtion in the aeration.
[1/mg/L]
DERIVATIVE TIME Derivative Time of DO controller [min]
INT PART Integral part for DO control
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 Set minimum speed for VFD controlled blowers (stage 1 and 2) [%]
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.
4.4.3 1-Channel RTC103 N-Module VFD (Continued)
RTC MODULES / PROGNOSYS
RTC MODULES
RTC