[time-nuts] Re: Leviton VTP24 Is this Time Accurate enough?

[Lux, Jim]

On 8/27/21 3:30 AM, Dana Whitlow wrote:
> If my watch were that bad, I'd toss it out and go shopping for a new one.
> I wonder if Leviton offers a version with an external ref input.
>
> Dana

When your requirement is "turn the lights on and off with the sun" 5 
min/year is pretty good.

OTOH, Perhaps there's an aftermarket for a modified version. Maybe 
you've got a niche business opportunity there, Dana.

"Now, with improved accuracy!

Ovenized for better performance!

30 millsecond error in one year!
"

You might need to gradually change the frequency you feed it, though, 
because I'll bet their sunrise/sunset algorithm doesn't implement the 
equation of time. But if you're doing milliseconds, you'll need it.



>
>
> On Fri, Aug 27, 2021 at 12:12 AM D. Resor <organlists1 at sonic.net> wrote:
>
>> I inquired with Leviton as to the accuracy of the VTP24 24 Hour
>> Programmable
>> Timer with DST.
>>
>> https://www.leviton.com/en/products/vpt24-1pz
>>
>> Don Resor
>>
>> Here is the reply I received:
>>
>> Hello,
>>
>> Thank you for contacting Leviton technical support. According to the code
>> it
>> meets, it is required to have time keeping accuracy within 5 minutes every
>> year.
>>
>> It also uses a crystal to keep time, as it must maintain the time even
>> during power outages.
>>
>> Regards,
>>
>> Virgilio Dominguez
>> Technical Services Representative II
>> Leviton Manufacturing Co., Inc.
>> 201 North Service Road., Melville, NY 11747
>>
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