Operation and Maintenance Manual for
Operation and Maintenance Manual for
Operation and Maintenance Manual for
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Time Delays Time delays <strong>and</strong> deadb<strong>and</strong>s are used to control the action of the MC10 alarms.<br />
These are described below.<br />
Process Value<br />
Time<br />
Delay<br />
Time<br />
Alarm is Released When Rising Process Value<br />
Exceeds Setpoint Plus Deadb<strong>and</strong><br />
Deadb<strong>and</strong><br />
Low Alarm Setpoint<br />
Alarm Activates at End of Time Delay<br />
The illustration above shows the action of a low alarm setpoint on a falling value.<br />
The high setpoint works in the same manner except the deadb<strong>and</strong> is below the<br />
setpoint.<br />
Process Value<br />
Time<br />
Delay<br />
Time<br />
Alarm Activates at End of Time Delay<br />
High Alarm Setpoint<br />
Deadb<strong>and</strong><br />
3-7<br />
Alarm is Released When Rising Process Value<br />
Drops Below Setpoint Minus Deadb<strong>and</strong>