Branson Krautkramer MIC 10, Руководство пользователя

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Calculating the statistical data
Average value
The average (AVG) is calculated as an arithmetical
mean:
AVG =
(
x
1
+
x
2
+
x
3
+ …
x
n
)
n
whereby x = single measurement
n = number of measurements
Relative tolerance range
The relative tolerance range (RNG) is calculated as fol-
lows:
RNG[%] =
(
MAX
−
MIN
) ⋅
100
AVG
Relative standard deviation
The relative standard deviation (STD) is calculated as
follows:
STD[%] =
S
AVG
⋅
100
whereby S = Standard deviation (mean error
of single measurement)
S is calculated as follows:
S =
√
(
x
1
−
AVG
)
2
+ (
x
2
−
AVG
)
2
+ … + (
x
n
−
AVG
)
2
(
n
−
1
)
Minimum material thickness
The minimum material thickness required (tenfold in-
dentation depth) is calculated as follows:
d[mm] = 0.62 X
√
Test
load
[ N ]
⁄
Average value [ HV ]
Notes on statistical evaluation
Appendix
Krautkrämer MIC 10 Issue 08, 08/01 12-7
Calculating the statistical data
Average value
The average (AVG) is calculated as an arithmetical
mean:
AVG =
(
x
1
+
x
2
+
x
3
+ …
x
n
)
n
whereby x = single measurement
n = number of measurements
Relative tolerance range
The relative tolerance range (RNG) is calculated as fol-
lows:
RNG[%] =
(
MAX
−
MIN
)
⋅
100
AVG
Relative standard deviation
The relative standard deviation (STD) is calculated as
follows:
STD[%] =
S
AVG
⋅
100
whereby S = Standard deviation (mean error
of single measurement)
S is calculated as follows:
S =
√
(
x
1
−
AVG
)
2
+ (
x
2
−
AVG
)
2
+ … + (
x
n
−
AVG
)
2
(
n
−
1
)
Minimum material thickness
The minimum material thickness required (tenfold in-
dentation depth) is calculated as follows:
d[mm] = 0.62 X
√
Test load [ N ]
⁄
Average value [ HV ]
Notes on statistical evaluation
Appendix
Krautkrämer MIC 10 Issue 08, 08/01 12-7