Hach-Lange RTC103 N-Module - Manual (Page 49)

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Parameterization and operation
4.9.11 INTEGRAL TIME NH4 (only if NH
4
-N measurement in effluent is available for feed
back control)
Integral time for the PID closed loop controller for the NH
4
-N
concentration in the thickened sludge.
Note: INTEGRAL TIME NH4 is set to “0” to deactivate the integral part
of the PID controller.
4.9.12 DERIVATIVE TIME NH4 (only if NH
4
-N measurement in effluent is available for
feed back control)
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.
4.9.13 Min DO
If a calculated DO set point is lower than the MIN DO value, the
DO set point is set to that value.
4.9.14 Max DO
If a calculated DO set point is higher than the MIN DO value, the
DO set point is set to that value.
4.9.15 SMOOTHING
Smooth this calculated DO set-point, for more economical blower
control.
4.10 Explanations of DO CONTROL (For DO control option only)
Note: The configuration for DO control, different kind of blowers,
aeration stages has to be carefully pre-configured from service of
supplier on CF-card of RTC103 N-Module.
4.10.1 P FAKT O2 (For VFD option only)
Proportional factor for the PD closed loop controller for the DO
concentration in the aeration.
4.10.2 DERIVATIVE TIME
Derivative time of the controller
4.10.3 INT PART
Integral part for the closed loop controller for the DO
concentration in the aeration.
Note: INT PART is set to “0” to deactivate the integral part of the
controller.
4.10.4 DAMPING
Damping of DO control - for avoiding quick changes in blowers
control.