Hach sc200 User Manual page 34

Option Description
Low deadband Sets the range where the relay remains on after the measured value increases above the
low alarm value. For example, if the low alarm is set for 1.0 and the low deadband is set for
0.5, the relay remains on between 1.0 and 1.5. Default is 5% of the range.
High deadband Sets the range where the relay remains on after the measured value decreases below the
high alarm value. For example, if the high alarm is set for 4.0 and the high deadband is set
for 0.5, the relay remains on between 3.5 and 4.0. Default is 5% of the range.
Off delay Sets a time (0-300 seconds) to delay the relay from normally turning off (Default:
0 seconds).
On delay Sets a delay time for the relay to turn on (Default: 0 seconds).
Figure 18 Alarm function
1 High alarm
2 High deadband
3 Low deadband
4 Low alarm
• Feeder Control Function (refer to
Option Description
Phase Defines the relay status if the process value exceeds the setpoint.
High (default)—turns the relay on when the process value exceeds the setpoint.
Low—turns the relay on when the process value falls below the setpoint.
Set setpoint Sets the process value at which the relay toggles. The default value is different for each
sensor.
Deadband Sets the area for an amount of change necessary after the relay setpoint is reached in
order to satisfy a condition.
32 English
5 ON delay
6 OFF delay
7 Time (x-axis)
8 Source (y-axis)
Figure 19 and Figure 20)