Hach-Lange SC 1000 - Manual (Page 94)

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Advanced Operations
6.3.3.4 Function set to 2 POINT CONTROL working mode
Figure 57 Relay behavior—Feeder Control mode (Phase low, OnMax Timer)
1 Deadband 5 ON delay
2 Set point 6 OFF delay
3 OnMax Timer 7 Source (y-axis)
4 Time (x-axis)
Table 30 Color/line code for Figure 57
Selected source
Relay contact (phase low)
2 POINT CONTROL
SET TRANSFER
Default value: DE-ENERGIZED
Sets the status of the relay (ENERGIZED/DE-ENERGIZED) if error conditions are detected in
the selected source or if the source is missing.
PHASE
Default value: HIGH
Sets the status of the relay. As soon as the process value enters the band between high and low
alarm, the relay state is not changed.
HIGH
Turns the relay ON when the process value exceeds the high alarm
Turns the relay OFF when the process value falls below the low alarm.