Cell Blank Compensation - Hitachi 902 Service Manual

9.3.2 Cell Blank Compensation

Raw absorbance
at main
wavelength
1 to 35 max.
Cell blank
compensation
Raw absorbance at
main wavelength
after cell blank
compensation
1 to 35 max.
<Supplementary explanation>
The cell blank calculation method (Note) and compensated points vary with analytical method.
For details, refer to the classification of analytical methods.
NOTE: If an alarm is indicated for any of cell blanks 1 to 4, the following table will be used.
Number of
Alarms
Raw absorbance
at sub wavelength
1 to 35 max.
Cell blank
compensation
Raw abosrbance at
sub wavelength
after cell blank
compensation
1 to 35 max.
Cell Blank Value
1 Mean value of 2 data without alarm
2
(
+
C
1
3
(
+
C
1
Calculation of
cell blank value
Calculation of
cell blank value
)
+ + C
C C
2 3 4
4
)
+ +
C C C
2 3 4
4
9 - 12
Raw absorbance of
cell blank at main
wavelength
1 to 4
Raw absorbance of
cell blank at sub
wavelength
1 to 4
Data Alarm
(cell blank abnormal)
Not indicated
Indicated
Indicated