Atlas Copco Power Focus 4000

Statistic
9836 3123 01 279 (428)
i
X
1i
X
2i
X
3i
X
4i
X
5i
X
6i
X
7i
X
8i
X
9i
X
10i
X
11i
X
12i
X
13i
X
14i
X
...i
X
A subgroup is a group of tightenings. Subgroup size is freely programmable and in the example above it is
set to 5, which means that all values in the same group range from i to i+4.
X-bar is the calculated average of the last completed subgroup.
Subgroup size = Group size = z
],,,,,min[],,,,,max[
],,,,,min[],,,,,max[
2212211
1121
zizizizizizin
ziiiziiin
XXXXXXW
XXXXXXWGrouprange




6
5



n
nj
j
W
W
W
ll
CAM
*6
)min(max746.1 

The formula for CAM is calculated using the first 6 subgroups. After that, a new calculation is made using
each completed subgroup in conjunction with the last 6 subgroups.









n
i
i
x
n
X
1
1









n
i
i
r
n
R
1
1
 
XUCL X A R  
2
 
XLCL X A R  
2
RUCL D R 
4
RLCL D R 
3