jizzer Posted July 31, 2006 Share Posted July 31, 2006 Hi, The american dynamics dvr I am using is losing its time setting by about 5 minutes a day?? Could it be the button cell on the motherboard ,like on a pc , or could there be another reason? Link to comment https://www.thesecurityinstaller.co.uk/community/topic/11508-dvr-losing-5-minutes-a-day-on-clock/ Share on other sites More sharing options...
Guest Posted July 31, 2006 Share Posted July 31, 2006 Just backed 3 16 channel ones with defective motherboards, suggest you give them a call with its batch number. Link to comment https://www.thesecurityinstaller.co.uk/community/topic/11508-dvr-losing-5-minutes-a-day-on-clock/#findComment-108985 Share on other sites More sharing options...
Service Engineer Posted July 31, 2006 Share Posted July 31, 2006 Could it be an actual American version thus expecting a 60Hz mains supply, instead of our 50Hz supply..? That would explain the Time losses.? ........................................................ Dave Partridge (Romec Service Engineer) Link to comment https://www.thesecurityinstaller.co.uk/community/topic/11508-dvr-losing-5-minutes-a-day-on-clock/#findComment-109015 Share on other sites More sharing options...
Guest Posted July 31, 2006 Share Posted July 31, 2006 Possibly, my probs wer with DM ones , pulls foot out of mouth and limps off. Link to comment https://www.thesecurityinstaller.co.uk/community/topic/11508-dvr-losing-5-minutes-a-day-on-clock/#findComment-109020 Share on other sites More sharing options...
Guest Posted July 31, 2006 Share Posted July 31, 2006 Yep, other resons might be an unstable AC source, its not on a building site running a genny is it?? Dont forget cheaper units may suffer from ambient temperature variations affecting the clock speed - is it in an airing cupboard or something?? Just a few ideas. Link to comment https://www.thesecurityinstaller.co.uk/community/topic/11508-dvr-losing-5-minutes-a-day-on-clock/#findComment-109024 Share on other sites More sharing options...
Guest Posted July 31, 2006 Share Posted July 31, 2006 Could it be an actual American version thus expecting a 60Hz mains supply, instead of our 50Hz supply..? That would explain the Time losses.? it would run 0,8333... seconds in a second so 72000 seconds in a day --> 1200 minutes --> 20hrs Link to comment https://www.thesecurityinstaller.co.uk/community/topic/11508-dvr-losing-5-minutes-a-day-on-clock/#findComment-109038 Share on other sites More sharing options...
jizzer Posted July 31, 2006 Author Share Posted July 31, 2006 it would run 0,8333... seconds in a second so 72000 seconds in a day --> 1200 minutes --> 20hrs No its not running at 60Hz its a uk spec machine 230V 50Hz on a domestic single phase supply...it is mounted in the loft so it is quite warm but I have also been bench testing it on the computer table and also noticed the time loss. Is the button cell on the motherboard nothing to do with the time accuracy???? Link to comment https://www.thesecurityinstaller.co.uk/community/topic/11508-dvr-losing-5-minutes-a-day-on-clock/#findComment-109091 Share on other sites More sharing options...
Service Engineer Posted July 31, 2006 Share Posted July 31, 2006 Is the button cell on the motherboard nothing to do with the time accuracy????Nope, it's a backup battery for the bios.No its not running at 60Hz its a uk spec machine 230V 50Hz on a domestic single phase supplyI know that, but was wondering if the innards (PCB) could have been the US version mistakenly put in a UK shell . ........................................................ Dave Partridge (Romec Service Engineer) Link to comment https://www.thesecurityinstaller.co.uk/community/topic/11508-dvr-losing-5-minutes-a-day-on-clock/#findComment-109101 Share on other sites More sharing options...
SystemQ Posted August 1, 2006 Share Posted August 1, 2006 Dont forget cheaper units may suffer from ambient temperature variations affecting the clock speed - is it in an airing cupboard or something?? Just a snippet of info. A lot of electronic devices still use a timer based around the crystal technology of the early digital wristwatch. The whole timing is derived from the frequency at which the crystal oscillates, and this frequency is effected (slightly) by the temperature of the crystal. The wristwatch makers knew that whilst the watch was being worn the internal crystal would be at a pretty stable temperature around 34C do to the human bodies accurate temperature regulation. (skin is around 32-35C) Stick this same crystal timer in a device that can be subject to a wide fluctuations in temperature in winter/summer and you get corresponding irregular time keeping. Paul. System Q Ltd. Link to comment https://www.thesecurityinstaller.co.uk/community/topic/11508-dvr-losing-5-minutes-a-day-on-clock/#findComment-109119 Share on other sites More sharing options...
Matt the Teckie Posted August 1, 2006 Share Posted August 1, 2006 Early Intellex' were prone to time keeping issues. I'd get onto Tyco Tech, they can be reached if you call //.National Installer.// HQ in Sunbury. One thing you might want to try first is checking that the BIOS clock and the Windows clock are running in sync. The BIOS password used to be xellet. Hope this helps Link to comment https://www.thesecurityinstaller.co.uk/community/topic/11508-dvr-losing-5-minutes-a-day-on-clock/#findComment-109121 Share on other sites More sharing options...
Recommended Posts
Archived
This topic is now archived and is closed to further replies.