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897N203029A FDC NX600 Instruction Manual 2022.01
3 Measurement
3.10 QC Card System
(1) Overview
The QC card system compensates for variations between lots of FUJI DRI-CHEM slides and
ensures uniform performance.
Y
X
Y
y
3
y
2
y
1
標準液基準値
x
1
x
2
x
3
スライド (補正前) の実測値 X
0030
Reference liquid standard value
Y
Y
y
3
y
2
y
1
x
1
x
2
Actual measurement values of slide (before
compensation) X
x
3
X
Calculation method
A variety of the reference fluids developed for FUJI
DRI-CHEM slides are measured on each lot of
slides.
The relationship between the actual measurement
values X (x
1,
x
2,
x
3
) and the standard values Y (y
1
, y
2
,
y
3
) is expressed by the formula Y=c+dX+eX
2
. The
lot compensation coefficients (c, d, and e) derived
from the formula are used to compensate for varia-
tions in X of each lot.
(2) Inputting lot compensation coefficients using a QC card
The lot compensation coefficients are recorded on QC cards, and one QC card is packed with
each box of slides. When data is input from a new card, the previously stored lot compensation
coefficients are updated. Always read the new QC card when you switch to a new box of slides,
because each QC card also contains slide data essential for measurement, in addition to the lot
compensation coefficients.
NOTE
The “e” values recorded on the QC cards are expressed as e×10
3
.
NOTE
The analyzer records the QC card information of up to 5 lots for each test. Reading QC
cards of more than 5 lots results in deletion of QC information starting from the oldest.
(3) Using QC cards
A QC card must be read when a new test slide will be used or when changing to a new lot of
slides.
Read the QC card while [Ready to test] or [Warming up] is displayed on the LCD.
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