A-96.250.511 / 091120
AMI Turbiwell
Program List and Explanations
96
Control upwards or downwards
5.2.1.43
Control Parameters
: Meas. value
5.2.1.43.10
Setpoint
: User-defined process value (Measured value or flow)
Range: 0–250 FNU/NTU
5.2.1.43.20
P-Band
: Range below (upwards control) or above (downwards
control) the set-point, within the dosing intensity is reduced from
100% to 0% to reach the set-point without overshooting.
Range: 0–250 FNU/NTU
5.2.1.43
Control Parameters
: Sample flow
5.2.1.43.11
Setpoint
: User-defined process value (Measured value or flow)
Range: 0–100.0 l/h
5.2.1.43.21
P-Band
: Range below (upwards control) or above (downwards
control) the set-point, within the dosing intensity is reduced from
100% to 0% to reach the set-point without overshooting.
Range: 0–100.0 l/h
5.2.1.43.3
Reset time:
The reset time is the time till the step response of a
single I-controller will reach the same value as it will be suddenly
reached by a P-controller.
Range: 0–9’000 sec
5.2.1.43.4
Derivative time:
The derivative time is the time till the ramp response
of a single P-controller will reach the same value as it will be
suddenly reached by a D-controller.
Range: 0–9’000 sec
5.2.1.43.5
Control timeout:
If a controller action (dosing intensity) is constantly
over 90% during a defined period of time and the process value does
not come closer to the setpoint, the dosing process will be stopped
for safety reasons.
Range: 0–720 min
5.3 Relay Contacts
5.3.1
Alarm Relay:
The alarm relay is used as cumulative error indicator.
Under normal operating conditions the contact is
active.
The contact is
inactive if:
Power loss
Detection of system faults like defective sensors or electronic
parts
High case temperature
Lack of reagents
Process values out of programmed ranges.
Program alarm levels, hysteresis values and delay times for the
following parameters:
Meas. value, Sample Flow
