Hitachi 902 Service Manual page 50

No. Data Alarm
Absorbance over
Prozone error
Printer S. I/F
ABS? Z (Photometry assay)
The absorbance value to be
used for calculation after cell
blank correction exceeds 3.3
Abs. The absorbance is
checked for every
wavelength.
P (Photometry assay only)
*****P
In 1-point or 2-point assay
('*****'
with prozone check, the
indicates
prozone error is indicated if
a
'prozone' is detected.
prozone
Prozone check is performed
value.)
by comparing the prozone
value (hereafter referred to
as PC value) obtained from
calculation mentioned below
with the prozone limit value
preset on the chemistry
parameter screen. For the
lower prozone limit, the
prozone error is indicated if
the PC value is smaller. For
the upper prozone limit, the
error is indicated if the PC
value is larger.
In the event of prozone error,
the relevant PC value is also
printed out (only in real-time
monitor printing mode).
Description
2 - 38
(cont
Remedy
• In 1-point & rate, rate-A
or rate-B assay, check is
not carried out for the
interval to determine the
absorbance change rate
if an ascending reaction
setting is made for that
interval.
• Dilute the sample or
reduce its volume, and
then perform
measurement again.
• Set the sample correctly.
• Prepare the reagent
again.
• Prozone check values
are printed out only in
the real-time monitor
printing mode.
• Delution or retest with
decreased volume is
performed.
• For no-check, enter
'-32000' (lower limit) at
"Prozone limit value" on
the parameter setting
menu screen 1.
d)
'