Hitachi 902 Service Manual page 69

Automatic analyzer
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Absorbance for concentration
calculation
Prozone check value
(PC value)
< Judgment >
In case of 'limit value - above,' comment xxxP (xxx indicates PC value) is printed when PC
value is larger than the limit value. In case of 'limit value - below,' the comment is printed
when PC value is smaller than the limit value.
• Prozone check will not be performed in the following cases.
(1) In STD (1) measurement
Antigen Readdition Method
(1-point assay)
A
+ A
A
=
l
l-1
x
2
A
+ A
A
+ A
l
PC =
-k
m
m-1
2
2
(2) |Ap - Am| < 100 × 10
2 - 57
Reaction Rate Ratio Method
A
m
A
=
x
(A
m
l-1
PC =
(A
p
(2-point assay)
+ A
A
+ A
m-1
l
l-1
-k
2
2
- A
)/(m-n)
n
× 100
- A
)/(p-n)
n
-4
Abs

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