[time-nuts] Casio Wave Ceptor wrist watch - quick accuracy test

David G. McGaw david.g.mcgaw at dartmouth.edu
Mon Jun 11 15:44:12 EDT 2018

I think you guys won the luck of the draw.  I have had a Casio 
WV200DA-1AV Wave Ceptor for a while, module 3140.  Nice watch, but it 
gains about 1/2 sec per day when not synchronized.  I recently got a 
Casio GW-M5610 G-Shock, module 3153.  I have not run it unsychronized, 
so have not checked its drift, but other G-Shocks have been quite good.  
It is the higher-end line with tighter specs and they actually have a 
trimmer inside.

David N1HAC

On 6/11/18 6:30 AM, Dana Whitlow wrote:
> I bought a Casio 'atomic watch" about 3 months ago, one which uses the
> '3405' module.
> I've also been running checks with radio setting turned off, and mine is
> coming in at
> just under 1 sec per month, based on seeing how long it takes to drift one
> second.
> But I find that visual/aural coordination is a poor way to do business- if
> the error is near
> zero (or an integer number of seconds), my eye/ear/brain will shift to make
> it look like
> it's "right on" within a few seconds even if the initial look says it's a
> little bit off.
> I hadn't thought of the video approach- sure wish I had a means to record
> video and
> then view it frame by frame.
> Dana
> On Mon, Jun 11, 2018 at 3:20 AM, Esa Heikkinen <tn1ajb at nic.fi> wrote:
>> Hi!
>> There seems to be some kind of comeback going on with 80's style digital
>> watches. You may find replicas of some 80's models or even re-makes of the
>> original models from original manufacturer.
>> So I decided to get one. As a time-nut my primary goal was to have radio
>> controlled 'atomic' model. So I ended up to Casio Wave Ceptor
>> WV-59DE-1AVEF. There's many models available from basic digital models like
>> this to very nice ones with with full titanium body (analog style). But
>> because of the 80's is hot it had to be digital...
>> Wave Ceptors suport all time signals formats (US, UK/German and Japan) and
>> correct standard is automatically selected when home city is set.
>> One of the first things to do was to test the accuracy with radio
>> syncronization turned off. Correct time was fist set with DCF77. Then I
>> switched off the synconization. After beign about three days off there was
>> no significiant visible error on time. In the video we can see however
>> about one frame error, which means about 40 milliseconds. Still that's
>> pretty good result for wrist watch. Also, the syncronization will occur
>> once per day when the reception is good.
>> So the watch must be at least calibrated in the factory. Don't know if the
>> watch performs any kind of self-calibration according to radio
>> syncronization results, most likely not - but it would be technically
>> possible.
>> So far so good, it's accurate enough - at least as new. When
>> syncronization is turned on, there should never be visible error on time.
>> Here's my test video:
>> https://na01.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww.youtube.com%2Fwatch%3Fv%3D_A23buFeHd0&data=02%7C01%7Cdavid.g.mcgaw%40dartmouth.edu%7Ca8e76ed2d4b54ed75dce08d5cf866ee5%7C995b093648d640e5a31ebf689ec9446f%7C0%7C0%7C636643098739784325&sdata=EH0F8vRQK0jmROrREGrD9jDMcd2JQglutxZO%2BVff7t0%3D&reserved=0
>> --
>> 73s!
>> Esa
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