Millenium 4 and S/N calculation
Posted: Wed Nov 03, 2010 5:42 pm
by pdchemist15
Does any one know how to alter the calculation in millenium 4 so that it calculates the S:N per current USP calculations?
Posted: Thu Nov 04, 2010 8:01 pm
by DR
Posted: Fri Nov 05, 2010 6:28 pm
by benW
Hi Guys,
Just found a few minutes... For the USP s/n you will need to use 2xPeak Height/noise. The Empower custom field 2*Height*Scale to μV/peak to peak noise used for USP could be applied to Millennium – but unfortunately the Scale to μV field was not available in Millennium. That is where the baseline noise may be more useful as it is measured in mV and can be consistently converted to μV by multiplying by 1000 (as height is measured in μV). Bear in mind the drawback of using baseline noise – it is an average value and is adversely affected by sloping baselines over the extent of the section of baseline selected for measurement. However, peak to peak noise could be used with preset scaling factors.
Once again, hope this helps!
Best regards...