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Power Monitoring Expert - Why do I see many 'Not Synchonous Status' events for my Sepam devices?

These events will be seen if you look in the device event log. They have a priority of 0, so they get filtered out in other places where events are displayed, such as the Global Event Viewer in Vista, or the Alarms web application.
These events can be ignored. They do not indicate a problem with either the software or the Sepam.

Additional Information:
The device expects timesyncs to be within 100 ms of the internal clock time, and also for the time sync to be sent within 200 ms of the last time sync. PME can meet the last criterium, but will often not be accurate enough in busy Ethernet networks or on slow VM, thus we see this event.

For Sepam series 20, 40, 60, and 80 RTC (Real Time Clock ), the time accuracy drift without any time synchronization is 25ppm (parts per million) at a normal operating temperature range stated in the manual. It means, in a day, 25ppm x 3600 x 24 = 2.16 seconds per day, in a year that is 13.14 minutes.

This means, if the PME can send several time-synch signals per hour (maximum allowable for PME to send), Sepam will be very accurate.


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