A couple of years ago, the Apple II that runs our MAT 251 died. We
were able to, with some simple circuit building and modifications,
update this instrument to work with a modern PC and a data acquisition
card. The computer now runs beautifully using a Matlab interface,
although Labview would also work.
Just a thought,
On Nov 2, 2009, at 8:41 PM, Frank Simpson wrote:
> Hello, November 2, 2009
> We have a Varian MAT 250 isotope ratio mass spectrometer (SN#
> 8223). This instrument was manufactured in December 1979, a year or
> more before MAT was purchased by Finnigan. Unlike the subsequent 251
> model, which used an Apple II computer, our MAT 250 uses a Hewlett
> Packard 9815a calculator/computer to operate the mass spectrometer.
> The hp 9815a calculator/MAT 250 system came with a set of programs on
> DC 100 cassette tapes. Some of these tapes were pre-programmed by hp,
> and some were pre-programmed by the MAT factory at Bremen.
> Does anyone still have a Varian/Finnigan MAT 250, or a Hewlett
> Packard 9815a calculator/computer, or any of the program tapes for
> this instrument?
> Thank you, very much!
> Sincerely, Frank Simpson
> University of Wisconsin, USA
> [log in to unmask]
Dr. Gerardo Dominguez
UC President's Postdoctoral Fellow
Department of Chemistry and Biochemistry
University of California San Diego
9500 Gilman Dr.
La Jolla, California 92093-0356
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