Siemens MOBILETT Plus HP Maintenance Instruction page 48

48
•
If the value for the fluctuation coefficient calculated is higher than 0.045, the reason for
the deviation must be determined and corrective measures 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 values measured.
Exposure
(n=10)
1
2
3
4
5
6
7
8
9
10
•
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 => Σ = 10.25
•
Calculate the average value:
Fig. 24:
•
Calculate the standard deviation:
Fig. 25:
MOBILETT Plus HP
Measured values
(xi)
1.01
1.02
1.03
1.04
1.03
1.02
1.02
1.01
1.03
1.04
SPR8-220.101.04.03.02
07.05
Inspection and Maintenance
Page 48 of 64
CS PS 24
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