false positive
An alert raised when nothing is actually wrong.
A false positive is a detection reported for a normal condition; lowering a threshold or shortening a hold count trades fewer misses for more false positives.
Examples
A single knock on the fan housing raises an alert with hold 1, though nothing is wrong: a false positive.
Raising the hold count from 1 to 3 removes the knock trace's false alerts but delays the true imbalance alert by two seconds.
See also