Who made that one?
I have three power station master clocks.
http://electricclock.omeka.net/items/browse?tags=Power+Station+Master+Clock
[electrictime]
Thomas D. Erb
o:
508-359-9684
p:
508-359-4396 x 1700
f:
508-359-4482
a:
97 West Street, Medfield, MA 02052 USA
e:
t
You tube video about line frequency time keeping issues in the EU.
https://www.youtube.com/watch?v=bij-JjzCa7o
[electrictime]
Thomas D. Erb
o:
508-359-9684
p:
508-359-4396 x 1700
f:
508-359-4482
a:
97 West Street, Medfield, MA 02052 USA
e:
t...@electrictime.com<mailt
-logo3.jpg]
Thomas D. Erb
o:
508-359-9684
p:
508-359-4396 x 117
f:
508-359-4482
a:
97 West Street, Medfield, MA 02052 USA
e:
t...@electrictime.com<mailto:t...@electrictime.com>
w:
www.electrictime.com<http://www.electrictime.com>
[https://s3.amazonaws.com/htmlsig-a
I actually have a 1930's unit in my clock collection - and in the 1980's we
used to make an AC power clock in a panel next to a quartz clock for small
island frequency control.
This is a link to my master clock
http://electricclock.omeka.net/items/show/6
I'm just wondering how is it set now ?
Thanks for the info.
So that tells me how data is recorded - but not how the frequency is kept
stable ?
Is the line frequency now directly tied to GPS clock - with no drift ?
Thomas D. Erb
t...@electrictime.com<mailto:t...@electrictime.com> /
Electric Time Company, Inc.
Office: 508-359-
I was wondering if anyone knew how the US power grids control their line
frequency with respect to time ?
There seems to be four separate grids - Eastern, Texas, Western and Quebec -
but I have no idea how they get their time.
Thomas D. Erb
t...@electrictime.com<mailt
I believe some of the cell phone protocols actually provide time to the phone
as part of the authentication process.
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to the bulk electric system.
https://www.ferc.gov/whats-new/comm-meet/2017/011917/E-13.pdf
Thomas D. Erb
t...@electrictime.com<mailto:t...@electrictime.com> /
Electric Time Company, Inc.
Office: 508-359-4396 x 117 / Fax: 508-359-4482
97 West Street Medfield, MA 02052 USA
www.electrictime.co
Maybe a capacitive load in your facility ? Whenever I've looked at it - it's
always been pretty clean. For years we used the AC mains for time keeping - but
have found in some locations - especially ones with lots of dimmers - zero
crossing counting was ineffective. My feeling was that dimmers
Here is an interesting discussion of Kalman filtering.
http://math.stackexchange.com/questions/173901/why-use-a-kalman-filter-instead-of-keeping-a-running-average
Thomas D. Erb
t...@electrictime.com<mailto:t...@electrictime.com> /
Electric Time Company, Inc.
Office: 508-359-4396 x 117
Thomas D. Erb
t...@electrictime.com<mailto:t...@electrictime.com> /
Electric Time Company, Inc.
Office: 508-359-4396 x 117 / Fax: 508-359-4482
97 West Street Medfield, MA 02052 USA
www.electrictime.com<http://www.electrictime.com>
[Facebook]<https://www.facebook.com/pages/Electric-T
I was wondering if anyone knew what the "state of the art" time standard was in
the 1937 ?
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