Welcome to the Cumulus Support forum.

Latest Cumulus MX V4 release 4.4.2 (build 4085) - 12 March 2025

Latest Cumulus MX V3 release 3.28.6 (build 3283) - 21 March 2024

Legacy Cumulus 1 release 1.9.4 (build 1099) - 28 November 2014
(a patch is available for 1.9.4 build 1099 that extends the date range of drop-down menus to 2030)

Download the Software (Cumulus MX / Cumulus 1 and other related items) from the Wiki

If you are posting a new Topic about an error or if you need help PLEASE read this first viewtopic.php?p=164080#p164080

Time synchronization

Discussion specific to Davis weather stations
Post Reply
XBower
Posts: 55
Joined: Fri 09 Aug 2013 9:12 am
Weather Station: Davis Vantage Vue
Operating System: Windows 10 64b
Location: Gothenburg, SE

Time synchronization

Post by XBower »

Hi.

I have read here and there that the PC clock should not be synchronized during the first hour on a new day, eg 0000-0100.
Could someone please explain to me why not?
What is most likely to be the problem?
Is this particular hour more sensitive for time changes than the rest of the day?
Does it matter how large the correction normally is?
I have a utility on my machine that synchronizes from NTP servers on the web at startup, and then every hour.
The correction is normally not very many milliseconds, perhaps one second from one day to the other.

Regards
----------------------------------------------------------------------
--- There IS intelligent life on Earth, but I'm only visiting ---
----------------------------------------------------------------------
User avatar
steve
Cumulus Author
Posts: 26672
Joined: Mon 02 Jun 2008 6:49 pm
Weather Station: None
Operating System: None
Location: Vienne, France
Contact:

Re: Time synchronization

Post by steve »

It can be a problem if the clock goes back from midnight, or just after midnight, to just before midnight, thus causing the date to change again.
Steve
XBower
Posts: 55
Joined: Fri 09 Aug 2013 9:12 am
Weather Station: Davis Vantage Vue
Operating System: Windows 10 64b
Location: Gothenburg, SE

Re: Time synchronization

Post by XBower »

steve wrote:It can be a problem if the clock goes back from midnight, or just after midnight, to just before midnight, thus causing the date to change again.
Thanks.
Should not be too difficult to get around.
----------------------------------------------------------------------
--- There IS intelligent life on Earth, but I'm only visiting ---
----------------------------------------------------------------------
Post Reply