Swann AMI Turbitrace Operator's Manual page 65

AMI Turbitrace
Program List and Explanations
5.2.1.43
5.2.1.43.10
5.2.1.43.20
5.2.1.43
5.2.1.43.11
5.2.1.43.21
5.2.1.43.3
5.2.1.43.4
5.2.1.43.5
5.3 Relay Contacts
5.3.1
A-96.250.131 / 050220
Control upwards or downwards
Setpoint: User-defined process value (Measured value or flow)
P-Band: Range below (upwards control) or above (downwards con-
trol) the set-point, within the dosing intensity is reduced from 100%
to 0% to reach the set-point without overshooting.
Control Parameters: Meas. value
Setpoint: 0–250 FNU /NTU
P-Band: 0–250 FNU/NTU
Control Parameters: Sample flow
Setpoint: 0–100 l /h
P-Band: 0–100 l/h
Reset time: The reset time is the time till the step response of a sin-
gle I-controller will reach the same value as it will be suddenly
reached by a P-controller.
Range: 0–9'000 sec
Derivative time: The derivative time is the time till the ramp re-
sponse 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
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
Alarm Relay: The alarm relay is used as cumulative error indicator.
Under normal operating conditions the contact is active.
The contact is inactive at:
 Power loss
 Detection of system faults like defective sensors or electronic
parts
 High case temperature
 Process values out of programmed ranges.
Program alarm levels, hysteresis values and delay times for the fol-
lowing parameters:
Meas. value, Sample Flow
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