Failure Hour Counter

The failure hour counter of the NOX monitoring registers the time to the second that the nitrogen oxide daily average has been above the configured level limit so far in a running calendar year. The detected normal operation hours of a day are added to this failure hour counter to the second if the final nitrogen oxide daily average exceeds the configured level limit (also see section Limit Monitoring).

For this failure hour counter, you specify a time limit in the NOX monitoring that must not be exceeded and a warning threshold that indicates that the failure hour counter is approaching the time limit.

You can configure the normal operation detection in the NOX Setup view (see section Preferences).

The change of day is firmly preset to 00:00:00 hrs Central European Time (CET) or UTC+1. At the beginning of a new calendar year, the failure hour counter is automatically reset to 0 hours.