[time-nuts] SRS SR620 counter problem

[Mike Feher]

I expect that it is a Lithium cell, so the voltage is correct. Although,
testing it with a 1K load may not be fair as in real service I believe they
only provide microamps. Regards - Mike

Mike B. Feher, EOZ Inc.
89 Arnold Blvd.
Howell, NJ, 07731
732-886-5960 office
908-901-9193 cell

-----Original Message-----
From: time-nuts-bounces at febo.com [mailto:time-nuts-bounces at febo.com] On
Behalf Of J. Forster
Sent: Monday, October 25, 2010 7:18 PM
To: Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] SRS SR620 counter problem

What's the battery nominal voltage supposed to be?

-John

==========


> Hi everyone!
>
> My SR620 is giving me an error 3 on power up. The manual says it's most
> likely a dead backup battery.
>
> I can clear it if I hold down the reset button while powering up. (This
> loads the factory defaults into the RAM.)
>
> However if I cycle power the error 3 comes back!
>
> The battery reads 3.44VDC and at the VCC pin of the Ram you get 3.20VDC
> with the AC power off.
>
> This seems to indicate the battery is good.
>
> I'm thinking of placing a 1K resistor across the battery to see if a load
> will cause a big drop.
>
> Any suggestions?
>
> The RAM is a CXK58257AP-70L.
>
> Thanks,
>
> Corby Dawson
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