Sylvac D 100S, Instructions For Use Manual

Page: 27 / 76

27
3/ Press
Enter
,the histogram of stored values will be displayed :
The number of cells is determined with the formula : n= √ N
but at least 5 cells and maximum 11 cells, n being always odd. The Y axis
represents % number of stored values for each cell.
The lower tolerance limit is indicated by LLT (lower limit of
tolerance) and the upper limit by ULT (upper limit of tolerance).
Values outside tolerances limits are displayed with a grey cell beside each
tolerances.
N = total number of stored values. width = cell width of histogram.
Histogram printing is available in 80 or 40 columns output formats.
1.6.9.2 2
nd
choice : X/R control charts.
The value stored in memory are divided into sub-groups of five measures. m represents the number of sub-groups
and n the number of measures memorized in the last sub-group. The date and time are stored with the sub-group.
1/ Press
Stat
key X chart appears :
Value greater than upper control limit.
Value less than lower control limit.
UCL : Upper control limit = X + A2 R, with A2 = 0.577 for n = 5
LCL : Lower control limit = X - A2 R, with A2 = 0.577 for n = 5
= = = : Target value
2/ Press
Enter
key (
Clear
key exit from charts display)
The R chart reappears :
UCL = Upper control limit = D4 R, with D4 = 2.114 for n = 5
LCL = Lower control limit = D3 R, with D3 = 0 for n = 5
To print press
Print
key (only in 80 columns format)
To return to X card, press
Clear
key.
To exit, press
Enter
key.