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

Page: 79 / 170

Display of the measurement uncertainty Measurement Uncertainty and Measuring Ranges
FISCHERSCOPE
®
X-RAY 79
standard set, cf. figure below. For the confidence interval, the
general provision according to Section 1 applies here as well.
For program-technology reasons, the systematic portion of the error
is available only via On-line-Export.
Setting of the error display for screen output and export in the
"Calibration standard set". Default setting: Systematic portion.
The systematic portion cannot be determined if no calibration has
been carried out. It will be set to Zero by the program.
10.4 Display of the measurement uncertainty
To be able to display all possible information, both the systematic
and the random portion of the error can be suppressed during the
error output. The setting for the type of error to be output is carried
out in the "Calibration standard set" ( ‘Calibration standard set.’,
beginning on Page 78). The table below shows the effect of the
error type setting for single readings and mean values.
Error types, cf. Fig. 2
Switch "Measurement
uncertainty display" Error specification for
single readings Error specification for
mean values
Random portion Theoretic error esti-
mate from the mea-
sured spectrum Confidence interval of
the mean value
according to t-distribu-
tion (student-V.), com-
puted from the
standard deviation of
the block.