Raritan PX3-4000 series, User Manual

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Appendix K: Additional PX Information
652
Note: For most sensors, the measurement unit in the "Assertion Timeout"
field is sample. Because the PX measures each sensor every second,
timing of a sample is equal to a second.
How "Assertion Timeout" is helpful:
If you have created an event rule that instructs the PX to send
notifications for assertion events, setting the "Assertion Timeout" is
helpful for eliminating a number of notifications that you may receive in
case the sensor's reading fluctuates around a certain threshold.
Assertion Timeout Example for Temperature Sensors
Assumption:
Upper Warning threshold is enabled.
Upper Warning = 25 (degrees Celsius)
Assertion Timeout = 5 samples (that is, 5 seconds)
When a temperature sensor's reading exceeds 25 degrees Celsius,
moving from the "normal" range to the "above upper warning" range, the
PX does NOT immediately announce this warning state. Instead it waits
for 5 seconds, and then does either of the following:
 If the temperature remains above 25 degrees Celsius in the "above
upper warning" range for 5 seconds, the PX turns on the "assertion"
action to announce the "above upper warning" state.
 If the temperature drops below 25 degrees Celsius within 5 seconds,
the PX does NOT turn on the "assertion" action.