hi Lukas, R plate or R deflection in manual corresponds to X-deflection in Isodat, Z deflection in manual corresponds to Y-deflection in Isodat, if 253 is not too different. Don't know about 'shield'. On Mon, Jul 30, 2018 at 11:10 PM, Lukas Flierl <[log in to unmask]> wrote: > Dear all, > > We are trying to investigate the influences of different experimental > parameters of the ion ratios measured using our Thermo MAT253. > Unfortunately we have not be able to find out the actually meaning of > terms like 'R plate' or 'shield'. In the manual it is not mentioned > what these (or any other) quantities does. So is there an exact > description of the purpose of each of these? > > Cheers, > > Lukas > > > ----------------------------------------------------------------- > Lukas Flierl > Physikalisch-Technische Bundesanstalt PTB > Metrology in Chemistry, 3.11 > Bundesallee 100 > <https://maps.google.com/?q=Bundesallee+100+%0D%0A38116+Braunschweig,+Germany&entry=gmail&source=g> > 38116 Braunschweig, Germany > Tel. +49-531-592-3318 > e-mail: [log in to unmask] > web: www.ptb.de -- Ying Lin, Ph.D.