FISCHER FISCHERSCOPE X-RAY 4000 Series, Operator'S Manual

Page: 114 / 170

Measurement device monitoring for the Fischerscope X-RAY Pre-run for determining the control limits
114 FISCHERSCOPE
®
X-RAY
All printed values are available in the print form of WinFTM PDM as
variables (including the control charts). They can re-calculate the
printed control limits by using the original values (mean value x. and
standard deviations s) and the equations specified in the previous
section. Please note that the pre-run has been concluded within a
short period (here: 17 minutes) in order to ensure the stability of the
instrument during the pre-run.
The protocol shows the video image of the reference sample that
the camera of the Fischerscope XRAY has recorded. The
measurement area is identified by an orange-colored ring, the
measurement spots where the instrument made individual
measurements during the pre-run are identified by yellow crosses.
Even though the reference area is small compared to the
dimensions of the sample, the distribution of the coatings within the
reference area can be non-uniform. Because during the check
measurement any measurement spot may be selected within the
reference area, a potential inhomogeneity of the coating
thicknesses must already be taken into account during the pre-run.