Rayto RT-7600S - Page 30

RT-7600S Auto Hematology Analyzer User’s Manual
30

Seq#.: sequence number of current QC point
Each screen displays two-parameter QC data distribution. QC chart of each parameter is
composed of X chart and R chart, reflecting QC data mean and range fluctuation respectively.
Three values on the left of X chart are, from top to bottom:
X
+
RA
2
,
X
,
X
-
RA
2
,
respectively. Three values on the left of R chart are, from top to bottom:
RD
4
,
R
,
RD
3
,
respectively; where,
X
=
k
i 1

i
X
/K,
i
X
is mean value of group i,
R
=
k
i 1

i
R
/K,
i
R
is the
difference between maximum and minimum of group i, K is subgroup quantity,
2
A
,
4
D
,
3
D
are coefficients determined by number of samples in each group.
Press “↓”, “↑” keys on keyboard or frame to switch between parameters.
Press “←”, “→” keys on keyboard or frame to display QC data of various sequence numbers.
Press “Print” button to print out one current group of QC data.