Another possibility: The 5061B ovens initially draw too much power for the UPS, charged or not.
Try plugging the standard into the wall until it heats up, then transfer it to the UPS. If the standard buzzes when it is plugged into the wall, it is not a problem in the UPS. Let it warm up anyway and see if the buzzing stops. This is what I'd do, and I've never lost a 5061B yet - but then, I've never owned one. Did have a 5065 and some other Caesium standard, both with high initial heater currents. Bill Hawkins -----Original Message----- From: Erno Peres Sent: Saturday, September 03, 2011 6:23 AM looks like the UPS battery and the 5061B draws too much current....together.... just charge-up the UPS and when it is OK plug the other unit in.... _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.