74
A-96.250.441 / 060619
AMU pH-Redox
Program List and Explanations
5.3.2.400
Hysteresis:
within the hysteresis range, the relay does not switch.
This prevents damage of relay contacts when the measured value
fluctuates around the alarm value.
5.3.2.50
Delay:
Duration, the activation of the alarm relay is retarded after the
measuring value has risen above/fallen below the programmed alarm.
Range. 0–600 sec
The relays may be used to drive control units such as solenoid
valves, membrane dosing pumps or motor valves. When driving a
motor valve both relays are needed, relay 1 to open and relay 2 to
close the valve.
5.3.2.22
Parameter:
Choose on of the following process values.
Meas. Value
Temperature
Sample Flow
5.3.2.32
Settings
:
Choose the respective actuator:
Time proportional
Frequency
Motor valve
Examples of metering devices that are driven time proportional are
solenoid valves, peristaltic pumps.
Dosing is controlled by the operating time.
5.3.2.32.20
Cycle time:
duration of one control cycle (on/off change).
Range: 0–600 sec.
5.3.2.32.30
Response time:
Minimal time the metering device needs to react.
Range: 0–240 sec.
5.3.2.32.4
Control Parameters
Range for each Parameter same as
Parameter
Range:
pH sensor
Redox sensor
Meas. Value
0.00 pH to +2.00 pH
0 mV to +200 mV
Temperature
0 °C to +100 °C
Sample flow
0–200 l/h
5.3.2.1
Function = Control upwards/downwards:
5.3.2.32.1
Actuator = Time proportional
