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

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Pre-run for determining the control limits Measurement device monitoring for the Fischerscope X-RAY
FISCHERSCOPE
®
X-RAY 123
Mean value x..
7.449 μ m 7.681 μ m
Standard deviation s
I
0.125 μ m 0.133 μ m
Confidence mean value
0.051 μ m 0.066 μ m
Range R(x.)
0.321 μ m 0.327 μ m
Lower control limit (x)
7.26 μ m 7.46 μ m
Upper control limit (x)
7.64 μ m 7.90 μ m
Upper control limit (s)
0.300 μ m 0.338 μ m
Number of groups
10 10
Measurement time
20 s
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.