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

[Dana Whitlow]

I should have mentioned that my Casio (module 3405) is a G-Shock "diving
watch" with a 20-bar
(~200m depth) rating.   In so far as possible, I never take it off my wrist
(TSA check points being the
occasional exception), and don't want any leak problems even though I never
dive.

I once bought a watch rated at 20m, and it only lasted about a month before
it leaked.  Apparently
normal living stresses are equivalent to diving to moderate to substantial
depths.

Dana


On Mon, Jun 11, 2018 at 2:44 PM, David G. McGaw <david.g.mcgaw at dartmouth.edu
> wrote:

> 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%7Ca8e76ed2d4b54ed75dce0
>>> 8d5cf866ee5%7C995b093648d640e5a31ebf689ec9446f%7C0%7C0%7C636
>>> 643098739784325&sdata=EH0F8vRQK0jmROrREGrD9jDMcd2JQglutxZO%
>>> 2BVff7t0%3D&reserved=0
>>>
>>> --
>>> 73s!
>>> Esa
>>> OH4KJU
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