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Important Info for Davis VP USB data logger users and potential users

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Weather Display:
For the USB data logger lock up problem
Message from Davis:
We are no longer swapping dataloggers for this issue after discovering the
source of the problem and a couple of solutions.

Apparently, the issue is noise and quite a problem for any SUB device that is
constantly connected and always on.

We have found that if the user simply unplugs their AC adapter from the
console and run on the console's C batteries alone (they'll last a year and
warn you when they're low) the problem goes away.

Some customers cannot unplug their AC adapter.  Sometimes they have cabled
systems and must use the AC adapter or they may exercise the datalogger
enough (5 minute internet uploads, bulletin 24/7, etc.) that the C batteries
run less than a year and makes replacement inconvenient.  These users should
then use a torroid placed on the AC line, USB cable or both to filter out the
offending noise.

The torroids we used were of the type detailed at this link.

Part Number 240-2245-ND
FERRITE CYLINDER CLAMP-ON
4.5MM
http://search.digikey.com/scripts/DkSearch/dksus.dll?Detail?name=240-2245-ND


These two methods have had great success and one should be implemented when
anyone experiences this "drop-out" problem.

niko:
"they may exercise the datalogger enough (5 minute internet uploads, bulletin 24/7, etc.) that the C batteries run less than a year"

WD users need to pay attention to that comment. Due to the faster data update rate the console batteries will only last about 3 months if you are running WD.

ShawneeWx:
Brian,

From the other thread about lock ups,  I had done both of the things that Davis asked me to do,  batteries only and the purchase of the cores from radio shack (at $12 each I think)  Still the same problem.  Maybe thats why they replaced mine.

TokKiwi:
It also brings into question the quality of the usb cables, apparently in some cases CAT5E shielded has better performance over a longer distance than oem USB cables.  Anyone tried an alternative cable?

TokKiwi

Budgie:
More to the point, if Davis know this is a regular problem, what are they doing to sort it?
They say they have located the source of the lockouts and come up with some solutions but will they be building these solutions into their equipment so that customers get a reliable unit when it's used with the USB datalogger?  :-k

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