Deprag 385565 A, Operating Instruction

Page: 8 / 54

8
5.1 Terminology
Measuring Value: Submitted torque from transducer.
Calibration Value: Sensitivity of transducer.
Measurement
Series:
The torque values are stored. At the end of a measurement
series, the average torque and standard deviation is being
calculated.
Average Values:
Mean value is calculated from a specific number of previously
stored values.



i
i
X
N
X
1
N
_
1
Standard Deviati
Standard deviation is calculated from a specific number of
on:
previously stored values. s
N


1
X X
i
i



( )
1
2
N
_
C
m
The machine capability index C
m
indicates how large the
dispersion of values is.

6
ue MinimumVal ue umVal
m
Maxim
C


C
mk
The machine capability index C
mk
is a statement how the mean
of the sample is located to the predetermined tolerance.
)
3
,
3
min(
 
ue MinimumVal Average Average ue MaximumVal
C
mk
 
