Stable Isotope Geochemistry


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Gerard Olack <[log in to unmask]>
Reply To:
Stable Isotope Geochemistry <[log in to unmask]>
Wed, 11 Feb 2004 13:51:04 -0500
text/plain (53 lines)
HI Howard--

Just a thought--amplifier problem???  Have you considered swapping
amplifiers with one of your unused cups, assuming they have the same
amplification?  If your system can have two amplifiers per cup, put a
spare amplifier in the second slot for cup 2 in case it is getting
confused and trying to read the alternate amplifier signal (just
guessing here).

good luck

take care


Howard Sanford wrote:

> At 12:31 PM 2/11/2004, you wrote:
>> I am not sure if this is applicable but we have had this happen on
>> our 251
>> usually after disconnecting cables.  It was a poorly seated connector on
>> the main data acquisition board.  If you have not done so disconnect and
>> reconnect all relevant cables.
> That would seem to match the recent swapping of computers and such,
> but if
> it was simply a bad connection, why only lose cup 2? And why would others
> report only losing the same thing? I would expect to see random
> communication problems if that were the case. EA not starting, losing
> vacuum readings, losing different cups, etc. Any ideas on how to check
> for
> this without having to restart things? Is there somewhere to check to see
> if a bit got missed in the last exchange of initialization calls?
> BTW, thanks for your speedy response. My clock shows that you
> responded to
> my message one minute before I sent it! Ever consider going into customer
> service, or pizza delivery?
> Howard
> Howard Sanford
> 919-513-3039
> North Carolina State University
> Dept. of Soil Science
> Box 7619
> 3114 Williams Hall
> Raleigh, NC 27695