Hitachi 902 Service Manual page 51

No. Data Alarm
Prozone error
Printer S. I/F
P Shown below are the
*****P
expressions for calculation of
('*****'
the PC value. Assuming that
indicates
the preset photometric points
a
are P1 and P2 and the
prozone
difference in absorbance
value)
between two wavelengths at
photometric point P is E:
(1)
PC value =Ep
Note that k = 1 when
Prozone check is not
carried out if P2 = 0.
(2)
PC value =
Note that prozone check is
not carried out if P3 = 0 or
|Ep
When P2' = 0, P2 is used.
In either case of (1) and (2),
prozone check is not made
for STD (1) measurement.
Description
In 1-point assay
, p -k
2 2-1
Ep , p
2
1-1
k: Liquid volume
correction factor
1 ≤ P1, P2 ≤ 5 or
6 ≤ P1, P2 ≤ 16 or
17 ≤ P1, P2 ≤ 33 or
34 ≤ P1, P2 ≤ 73.
In 2-point assay
−
Ep Ep
2 3
−
P2' P3
−
Ep Ep
4 3
−
P4 P3
| ≤ 100 × 10
- 4
- Ep Abs.
4 3
2 - 39
(cont d)
'
Remedy