We are running a Delta+XL with Real32 Isodat and have noticed that sometimes
when we are running multiple gases in the jump program, part way through a
long run the computer will lose the peak settings and jump to a BDAC position
that has no signal in one or more of the cups.

This can be corrected by going through the peak jump definition
routine again.  I don't know if this is the same problem as
in Isodat NT since MAT had not given us the software yet, when our
Delta + XL was delivered the NT version was still under testing, sounds like
there still are some bugs with both systems.

Try redefining the BDAC peak position and see if that brings your signal back.
I assume that you have ruled out a hardware problem (loose connection in MEMCO)
and know that it is a software problem?

Bill

>I am not familiar with the IsodatNT software, but this seems to be a
>problem common to NT systems with a internet-type interface between the
>mass spec and computer.

William J. Showers
Dept of Marine, Earth & Atm Sciences
Box 8208
North Carolina State University
Raleigh NC 27695

(919) 515 - 7143 Office
(919) 515 - 7802 Fax
(919) 515 - 3689 Computer Lab
(919) 515 - 7911 Field Lab
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