Mark, Transients, etc, might cause some hiccups, as I thought about this too. Plus, there's not much one can do about them, unless you look at what happened via a waveform, at the time.
Best, Will *********** REPLY SEPARATOR *********** On 6/27/2011 at 9:43 AM Mark Spencer wrote: >I once worked on a project in India where we had electrical problems that went away when reportedly the building owners watered the building ground system. I never got an explanation if there was supposed to be a functional neutral connection or if the ground system was serving as the neutral. To get back on the 60 Hz measurement topic, I tried measuring the phase difference between the 60 Hz line here in BC and the 1pps output of my thunderbolt and a sample of the results are shown in the attached file. I'm not sure if the results I am seeing are valid or not. My signal source is a 16 volt doorbell transformer that feeds a voltage divider which in turn feeds my 5370B with an approx 2 volt sine wave. Setting the trigger point on the 5370B to 0 volts appears to provide the best results and the sine wave from the voltage divider looks to be clean on my scope. But I'm wondering if changes in line voltage could be confusing things. Regards Mark Spencer ----- Original Message ---- From: Morris Odell <vilgo...@bigpond.net.au> To: time-nuts@febo.com Sent: Mon, June 27, 2011 4:31:26 AM Subject: Re: [time-nuts] 60 Hz measurement party > >mean a second wire ? Surely you do not mean they are using the earth > (dirt) as a > >return path ? That would be terribly inefficient ! Down here in Australia, Single Wire Earth Return (SWER) is common for long rural lines. They run at 12.7 kv (one phase of a 22 kv 3 phase line). At the consumer end there is a pole mounted transformer and a fenced off earth stake. It seems to work reasonably well even in dry conditions but you occasionally hear stories of a large quadruped coming to nasty end if they get inside the enclosure. Obviously there would be a radial potential field in the ground and on the surface and quite a voltage can develop across their legs. Morris _______________________________________________ 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. > > >__________ Information from ESET Smart Security, version of virus signature database 5851 (20110206) __________ > >The message was checked by ESET Smart Security. > >http://www.eset.com > > >_______________________________________________ >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. _______________________________________________ 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.