This is the Health Check plot for the 
quality of the dispersion solution in the GIRAFFE
arclamp calibration data. We display here the QC1 parameter rms_fit
(PRO.WSOL.RMS) which describes the rms of the residuals of the accepted line
positions against the dispersion
solution. This plot monitors the 
HC data taken in high resolution (H525.8B) and low resolution (L543.1, Medusa1
and 2 only). </font><p><font size="2">

The arclamp has been replaced on 2013-04-20, since then rms_fit is slightly
higher than before but without quality impact.</font><p><font size="2">

Check the N_LINES plot of this group for the number of lines accepted for the
dispersion solution, and the RESOL plot for resolution monitoring. </font><p><font size="2">

Check also the ARCLAMP plot under "lamp stability", to check the efficiency of
the ARC lamp.