Hi The most common approach to “monitor” a quartz movement is to listen to it at 32,768 KHz with a tuned microphone. If it is an analog movement, then one can detect the sound of the motor driving the mechanical side.
Do you need a device with a visual readout or are you after something that gives you an electrical signal (like a PPS)? Is DIY ok in this application? If so, there are a lot of TCXO’s out there that will do at least as well as what you are looking for. A very different approach would be a GPS (or WWVB) module with a battery attached to it. If a watch is “ok”, there are WWVB and GPS watches that will do much better than 1 second accuracy for not very insane sort of prices. Bob > On Jan 11, 2019, at 2:57 PM, Joe Hobart <[email protected]> wrote: > > I need a relatively lightweight, self powered, portable clock accurate to 1 > second per month. Temperatures may range from 10 to 35 C; altitude from 1000 > to > 7000 feet. Although expensive, some of the marine quartz chronometers appear > to > meet this requirement. ~0.3 PPM. > > Does anyone have any experience with these devices? > > If so, has anyone tried to detect the probably weak magnetic field generated > by > the clock mechanism for time comparison purposes? > > Thanks, > Joe, W7LUX > > --- > This email has been checked for viruses by AVG. > https://www.avg.com > > > _______________________________________________ > time-nuts mailing list -- [email protected] > To unsubscribe, go to > http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com > and follow the instructions there. _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com and follow the instructions there.
