Specify a threshold above or below the severity level that sets an alarm to reduce alarm instances from a noisy signal.
Before you begin,
configure a trend alarm rule
. Configuring hysteresis is useful for preventing an alarm from clearing immediately after it is set. To learn more about hysteresis, refer to
Conditions of Setting and Clearing Alarms
. Specify an offset value from the Compare To value that clears an alarm.
and go to
Find and select the trend rule for which you want to configure hysteresis.
to bring up the
Trend Alarm Rule
Below the sample of data in the dialog, configure the hysteresis value in the Hysteresis text field.
The alarm rule that you have modified now clears an alarm when trend values cross the threshold for the hysteresis you specified. If you want to refine the conditions for setting an alarm further, consider
configuring an on and off delay