Name: Hach sc200
Brand: Hach
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• Feeder Control Function (refer to Figure 19 and Figure 20)

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.

Overfeed timer Sets a time period for de-activating an active relay if the

process setpoint cannot be reached. Once an overfeed

alarm is present, it must be manually reset.

Off delay Sets a delay time for the relay to turn off (default:

0 seconds).

On delay Sets a delay time for the relay to turn on (default:

0 seconds).

Figure 19 Feeder control function

1 Deadband (Phase = Low) 6 Time (x-axis)

2 Deadband (Phase = High) 7 ON delay (phase set high)

3 Setpoint 8 OFF delay (phase set low)

4 OFF delay (phase set high) 9 Source (y-axis)

5 ON delay (phase set low)

(nglisK 31

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