SYSMEX SF-3000 User Manual

QUALITY CONTROL, Variable Target Function
6-52 Sysmex SF-3000 Operator's Manual -- Revised September 1995
(3) 4.52 million is input as the third RBC
control data. The variable target
changes to 4.48 (= (4.50+4.45)/2).
UL
RBC
LL
4.59
4.48
4.37
N =3, UL-TARGET=0.11
Figure 6-45: Third Control Value
(4) 4.21 million is input as the fourth
RBC control data. The variable
target, calculated using all three of the
previous control data, changes to
4.49 (= (4.50+4.45+4.52)/3).
UL
RBC
LL
4.60
4.49
4.38
N=4, UL-TARGET=0.11
Figure 6-46: Fourth Control Value
The variable target function is useful for setting control target values when the instrument
is monitored using control blood (the analyzed values for which, unlike calibrator, are
not reliable in an absolute sense).
11.2 Variable Target Function and Erroneous Data
To ensure that the variable target function operates smoothly, control data that exceed the
preset control limits by a factor of 3 are not entered in the QC Charts.
[Example]
UL
RBC
LL
5.20
5.00
4.80
Control data chart entry upper limit
5.60
4.40
Upper control limit (UL)
Target
Lower control limit (LL)
Control data chart entry lower limit
LIMIT
Figure 6-47: QC Control Chart Definition
Assume that the control limits are the values given above. If the control data is 5.21
million, the message "Check QC Chart" will be displayed, but the data will be entered on
the chart. If the control data is 5.61 million however, it will not be entered on the QC
Chart, and the message "Reanalyze sample" will be displayed.

SYSMEX SF-3000 Specifications

General

Brand	SYSMEX
Model	SF-3000
Category	Measuring Instruments
Language	English