Mindray BC-2800, Руководство оператора

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Using the QC Programs
8-11
Figure 8-15 L-J graph screen (3)
The 12 parameters are divided into 3 groups for display, one group for one screen. You can
press [
↑ ] or [ ↓ ] to switch among the screens. At every”
L-J Graph
” screen, you can press [ ← ]
or [ → ] to view the results (displayed below the parameter box) of every point presented in the
graph. The current cursor position is displayed to the right of “
No.
” field and the time at which
this QC run was done is displayed to the right of ”
Time
” field.
The L-J graph is interpreted as follows:
„ The x-coordinate represents how many times the QC program has been run. The
y-coordinate represents the analysis results of the displayed parameters.
„ For every parameter, its L-J graph presents a maximum of 31 points.
„ For every parameter, the upper dash line of its L-J graph represents the upper limit of the
expected range of the analysis result. The corresponding value (4.9 in case of the WBC
in Figure 8-13) equals Mean + Range and is displayed to the left of the line.
„ For every parameter, the lower dash line of its L-J graph represents the lower limit of the
expected range of the analysis result. The corresponding value (4.1 in case of the WBC
in Figure 8-13) equals Mean - Range is displayed to the left of the line.
„ For every parameter, its expected result (4.5 in case of the WBC in Figure 8-13) is
displayed between the values of the upper dash line and of the lower dash line.
„ For every parameter, the three numbers displayed to the right of its L-J graph represents:
“
Mean
” – the mean value of the saved results, as the equation below defines,
n
X
Mean
n
i
i
∑
=
=
1
where
n
represents how many times the QC program has been run and
X
i
is the result
acquired from every QC analysis.