FISCHER FISCHERSCOPE X-RAY XDLM 231, Operator'S Manual

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Setting Up the Print Form Using PDM Variables Available for the final Evaluation
80 FISCHERSCOPE
®
X-RAY
of the current product.
@SA1Standard deviation s_a.
This standard deviation expresses the additional distribution
of the mean values of fixed blocks that cannot be explained
by the standard deviation s of the single readings within the
blocks. Thus, it is an additional distribution that is based on
causes different from the distribution of the single readings.
This characteristic statistical quantity is available only with
fixed block sizes.
@SD1Standard deviation s of the single readings of the selected
blocks in the current product.
The standard deviation s is a measure for the distribution of
the single readings of the measurement series around their
common mean value. It equals the mean square deviation of
the single readings from the mean value and is computed
according to the equation found in the appendix “Statistical
formulas of measurement technology for the
FISCHERSCOPE X-RAY“.
For fixed block sizes @SD1 is the standard deviation of the
block mean values.
Regarding the numerals
1; 2; 3 … after certain
variables:
A measurement consists
of one or more single
readings (“channels”) that
are identified by consecu-
tive numbers (1,2,3).
Example “Dual coating
measurement”
Top coating thickness = 1
Intermediate coating
thickness = 2
@SDTDate of the first block of the selected blocks in the current
product. The date of the last measurement of the block
is used as the date for this block.
@SP1Statistical process control chart (SPC chart) for the
attribute 1 of the sample.
@STBNumber of the first block of the selected blocks in
the current product.
@STMTime of the first block of the selected blocks in
the current product. The time of the last measurement of
the block is used as the time for this block.
@UE1Lower control limit LCL(d) of the mean values of an
SPC chart.
@UG1Lower specification limit LSL (lower tolerance) for the