Siemens AG SPR8-215.831.04.03.02 MOBILETT Plus/ -E/ -M
07.05 CS PS 24
Inspection and maintenance 47
Page 47 of 64
Medical Solutions
• If the value for the calculated fluctuation coefficient is higher than 0.045, the reason for
the deviation must be determined and corrective measures must be taken.
Refer to section "P10 - Fast adaptation" in the service instructions.
QSQ Fluctuation coefficient C
Steps for calculating C
Example:
The values used in the example are not real values.
• Release 10 exposures and record the measured values.
• Add the measured values:
Σ = 1.01 + 1.02 + 1.03 + 1.04 + 1.03 + 1.02 + 1.02 + 1.01 + 1.03 + 1.04 => S = 10.25
• Calculate the average value:
Fig. 24:
• Calculate the standard deviation:
Fig. 25:
Exposure
(n=10)
Measured val-
ues
(xi)
11.01
21.02
31.03
41.04
51.03
61.02
71.02
81.01
91.03
10 1.04
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