Dear ISOGEOCHEMISTS,

I am using MAT 253 with ISODAT NT2.0.  It seems like something happened
with our gas configuration files.  First problem is that we lost a value
for magnet for CO2, and I have been trying hard but cannot figure out
how to do mass calibration to get things back.  It keeps missing the
peak. It seems like I have to change the detection parameters but ISODAT
manual is not very helpful with this.

Second problem is that ISODAT switches to a wrong amplifier when I start
analysis.  It just doesn't make much sense to me how to select the
amplifier.  I'll appreciate if anyone can help me out.

Any inputs will be greatly appreciated.

Shuhei

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Shuhei Ono
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Geophysical Lab
Carnegie Institution of Washington
5251 Broad Branch Rd., NW
Washington, DC, 20015-1305
office: 202-478-8988
FAX: 202-478-8901