Since building my real time mains monitor, I've noticed just how far the mains timing drifts, for days at a time. Friday evening last week (10 days ago) timing was running at [plus] +50 seconds, and was slowly dragged back over the weekend to about +7s on teh Monday. Over the week it wobbled around, but on a slow downward trend. By Friday evening (2 days ago) it was -17s and I watched it drop further. Now, Sunday morning, it is -56 seconds
So in the space of eleven days the mains timing has drifted a total of nearly two minutes. There doesn't seem to be, anywhere, a long term record of mains timing error. You can download frequency from the Gridwatch site, but not timing. And I wouldn't trust integration over such extended periods to derive timing error. perhaps it's time to add a serial output to my monitor and couple up an old obsolete laptop Andy www.g4jnt.com _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com and follow the instructions there.
