We just had a similar problem here couple of weeks ago and solved it by
peak re-calibration (adjusting the scan window or re-assigning a new
number to HV steps didn't work).
Hope this information helps.
On 09.03.2015 13:12, Herbert Tobias wrote:
> Hello All,
> I have contacted the list with this question before but the problem
> still occurs.
> We have a persistant issue with random peak center failure during
> I have an idea how this might be taken care of. How can one rewrite
> the peak center script so that it doesn't just stop the sequence after
> a fail, but tries a second peak center? I can't find the PeakCenter
> script or program the acquisition script calls. There is only one in
> "Demo" that basically has no code.
> See below for details of problem:
> This is what I wrote last time:
> "When running a sequence in ISODAT 3.0 on a MAT253 IRMS, randomly
> sometime in the middle of the sequence (i.e. run 6 out of 25), we get
> an error and it stops. The error is as follows:
> Sequence STOP! The running script 'acqusition.isl' returns a FATAL
> error - "Peak Center failed"
> Our current procedure is to save a method file new. Re-boot computer,
> turn on IRMS, peak center on CO2, make a sequence from scratch (no
> cutting or pasting or weird long names with spaces), then save new,
> and run.
> This has resulted in a successful sequence run a few times, but now
> still get this error". Our computer is also not hooked up to internet,
> no antivirus, no background programs etc.
> The error occurs when the mass 44 cup (or all three) register a
> saturated signal
> (50000mV), get stuck there, and therefore peak center stops, which
> seems like a software or electronics issue. The amount of CO2 is
> ~4000mV at mass 44 when I run
> a pulse for peak center.
> It is not the centering window, when peak center starts, it captures
> the peak and it's center.
> P.s. we Run ISODAT 188.8.131.52 with service pack 184.108.40.206
> Dr. Herbert Tobias
> Sr. Research Associate
> Division of Nutritional Sciences
> 244 Garden Ave
> Cornell University
> Ithaca NY 14853
> 1-607-255-9009 
>  tel:1-607-255-9009