Swan Analytical Instruments AMI Codes-II CC Operator's Manual page 96

AMI Codes-II CC
Program List and Explanations
5.3.2.32.31.4
5.3.2.32.31.5
5.3 Relay Contacts
5.3.1
5.3.1.1
5.3.1.1.1
5.3.1.1.1.1
5.3.1.1.1.26
5.3.1.1.1.36
96
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 sudden-
ly 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
 Lack of reagents
 Process values out of programmed ranges.
Program alarm levels, hysteresis values and delay times for the fol-
lowing parameters:
 Free chlorine
 Total chlorine 1
 Total chlorine 2
 Case Temperature high and low
 Sample flow
 Temperature
 pH
Disinfection
Free av. chlorine
Alarm High: If the measured value rises above the alarm high value,
the alarm relay is activated and E001 is displayed in the message
list. Range: 0.00–10.00 ppm
Alarm Low: If the measured value falls below the alarm low value,
the alarm relay is activated and E002 is displayed in the message
list.
Range: 0.00–10.00 ppm
Hysteresis: Within the hyst. range, the relay does not switch. This
prevents damage of relays contacts when the measured value fluctu-
ates around the alarm value.
Range. 0.00–10.00 ppm
A-96.250.581 / 181120