Hitachi 902 Service Manual page 52

No. Data Alarm
Reaction limit
over
All points NG
Only one point
OK
Only two or three
points OK
Printer S. I/F
(Photometry assay only)
In 2-point rate, 1-point & rate,
rate-A or rate-B assay, the
main wavelength absorbance
at the photometric point to be
used for calculation exceeds
the reaction limit value (value
obtained after automatic
correction of input reaction
limit value). The error
condition varies depending
on the number of photometric
points within the reaction limit
LIMT 0 I
range as shown below.
(1) The reaction limit is
LIMT 1 J
(2) The reaction limit is
LIMT 2 K
(3) The reaction limit is
Description
exceeded at all points in
the input photometric
range.
exceeded at the second
and subsequent points
excluding the first point.
exceeded at the third and
subsequent points
excluding the first two
points, or at the fourth
and subsequent points
excluding the first three
points.
2 - 40
(cont
Remedy
• This alarm is issued
whenever the input
photometric range
values l and m for
calculation of the
absorbance change rate
do not satisfy l + 2 < m.
(Caution)
In 2-point rate assay, check
is made using not the input
photometric range values l
and m alone but all
photometric points between
l and m.
• Dilute the sample or
reduce its volume, and
then perform
measurement again.
• Prepare the reagent
again.
• Check for leakage or
clogging of the reagent
pipettor.
• Input correct values on
parameter registration
menu.
d)
'