On Tue, Jul 7, 2015 at 12:45 AM, D W <watsondani...@gmail.com> wrote: > With my new found interest in time nuttiness I thought I should upgrade to a > decently accurate watch. I had some features I was looking for and settled on > a Casio Wave Ceptor. My second choice was an Eco Drive, but the Casio had the > right mix of features at a good price. > > As I was sitting outside reading the manual after buying it, I laid it flat > on the table and started a manual sync to WWVB. The UI is pretty intuitive > for having so few buttons and indicators. It quickly told me that it had > found a stable signal, and about six minutes later it was synced. Pretty cool. > > Anyone know what the drift is like in this watch if it can't find the signal > for several days/weeks? I would hope that actual performance is a little > better than the +/- 15 sec per month stated in the manual. I should trap it > in a faraday bag for a while to test it...
I have a similar watch (the G-Shock GWM850-1 [1]) and have found it to keep within one second (compared visually to synchronized railway clocks in the UK and Switzerland) after 2 weeks of no signal. For reference, I take off the watch when showering but otherwise wear it continuously so the temperature of the watch is fairly consistent. They're pretty solid watches, though I find it to be a bit finicky when signal is marginal during the day: after locking to the signal it will switch between L1 (the lowest signal strength) and L3 (the highest) with a period of 20-30 seconds, which means it never syncs. At night it's much better, and typically syncs after only two minutes. Still, considering the whole thing fits on one's wrist and runs on a solar-charged battery, it's remarkably advanced and I recommend it. Cheers! -Pete [1] http://www.casio.com/products/Watches/G-Shock/GWM850-1/ -- Pete Stephenson _______________________________________________ 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.
