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77
7 Specifications
No. 99MAM029A
Meaning
Calculation formula
X¯
Subgroup average value
X¯ = ΣXi/N
R
Subgroup range
R = Xmax - Xmin
X
=
Center value
X
=
= ΣXi/N
X¯-UCL
Upper control limit
X¯-UCL = X¯ + A2 • R¯
X¯-LCL
Lower control limit
X¯-LCL = X¯ + A2 • R¯
R¯
Center (R control)
R¯ = ΣRi/n
R¯-UCL
Upper control limit (R control)
R¯-UCL = D4 • R¯
R¯-LCL*
1
Lower control limit (R control)
R¯-LCL = D3 • R¯
*
1
In case the number of samples is below 6, R¯-LCL is not printed.
Содержание DP-1VA LOGGER
Страница 16: ...xiv No 99MAM029A...
Страница 22: ...6 1 Outline No 99MAM029A...
Страница 42: ...26 2 Basic Operations No 99MAM029A...
Страница 76: ...60 4 Output No 99MAM029A...
Страница 88: ...72 6 Maintenance and Troubleshooting No 99MAM029A...