World clock.
| # | Post |
|---|---|
| 1 | I have always trusted the world clock as the most reliable timepiece for setting our clocks but recently discovered the world clock on my tablet differs from that on my phone. Seems odd that it is not exactly the same cary14 - 2020-11-16 15:36:00 |
| 2 | depends where they are getting there time from I guess... 'world clock' is not really explicit though, is it an app? or a description of the app? is it the same app on tablet and phone? The most accurate time is from an atomic clock, like this site uses for example Edited by king1 at 3:57 pm, Mon 16 Nov king1 - 2020-11-16 15:54:00 |
| 3 | So the time on these devices are not nessasarily correct cary14 - 2020-11-16 15:58:00 |
| 4 | they generally synchronise the time with a "time server" online but depending on settings this may or may not happen, or happen infrequently, and they can get out of sync by seconds/minutes... any more than a few minutes and I would be checking the timezone settings/daylight savings etc Edited by king1 at 4:07 pm, Mon 16 Nov king1 - 2020-11-16 16:07:00 |
| 5 | My computer clock always agrees with the time signal of RNZ. My mains clock runs fast. That doesn't make sense to me. trade4us2 - 2020-11-16 19:31:00 |
| 6 | trade4us2 wrote: Unless they are both getting their time signal from the same source, then nothing will make sense and you'll be late for those vital appointments with the man in the dark suit. tegretol - 2020-11-16 22:31:00 |
| 7 | tegretol wrote:
Mains clocks should always keep good time as the frequency of the power supply is controlled so that clocks keep correct time. Did you not know that? trade4us2 - 2020-11-17 09:07:00 |
| 8 | A stopped clock will always be correct twice a day. perfectimages - 2020-11-17 09:12:00 |
| 9 | perfectimages wrote: oh that's useful info ???????? nice_lady - 2020-11-17 09:22:00 |
| 10 | perfectimages wrote: unless its digital king1 - 2020-11-17 16:41:00 |
| 11 | Because there are so many power suppliers, there have been changes in the way that the NZ power supply is kept to 50 cycles/sec. So clocks that rely on 50 cycle mains power will not keep time as well as they used to. It normally costs a million dollars a year to keep my clocks accurate! https://www.transpower.co.nz/system-operator/electricity-mar "Instantaneous reserve is generating capacity, or interruptible load, available to operate automatically in the event of a sudden failure of a large generating plant or the HVDC link. trade4us2 - 2020-11-17 16:59:00 |
| 12 | trade4us2 wrote: You've just contradicted yourself in your post #11. Mains clocks are only as accurate as the mains frequency whereas network sync'd clocks are as good as the ntp pool. But of course you knew that and wanted a rise! tegretol - 2020-11-17 22:25:00 |
