Hitachi 902 Service Manual page 26

Alarm
Alarm
Control
No.
3551 to SENSITIV-
3588 ITY?
4151 to ISE LEVEL
4153
4161 to ISE NOISE
4163
Sub-
Category Level
code
86 1 to 36 WARNING In linear (with 2 to 6 points) or
(ch.)
90 1 WARNING The mean potential value
90 2 WARNING
90 3 WARNING
91 1 WARNING A difference (FIV) between
91 2 WARNING
91 3 WARNING
Description
nonlinear calibration, a
difference between the mean
STD (1) absorbance and the
mean STD (N)
absorbance is smaller than
the sensitivity limit (input
value).
NOTES :
7. N: = 2 for linear
(2points)
= 2 to 6 for nonlinear
and linear (3 to 6
points)
(Span point input value)
8. If either STD (1) or STD
(N) alone has been
measured, the
absorbance value of the
other STD is checked
using the previous data.
(EAV) at three out of five
measurement points of
internal standard solution is
outside the following range.
(Internal standard)
≤
Na : -90.0mV EAV
⇒ OK
≤
K : -90.0mV EAV
⇒ OK
≤
Cl : 100.0mV EAV
180.0mV
⇒ OK
maximum and minimum
potential values at three of
five measurement points of
internal standard solution is
outside the following range.
(Internal standard, sample)
Na : 0.7mV < FIV(2) - FIV(4)
K : 1.0mV < FIV(2) - FIV(4)
Cl : 0.8mV < FIV(2) - FIV(4)
2 - 14
Remedy
The result of
calibration is not
updated nor saved
onto FD.
(Note 7 )
(
1) Replace STD
and carry out
calibration.
(2) Replace the Na
electrode.
≤
-10mV
≤
(1) Same as above
-10mV
(2) Replace the K
electrode.
≤
(1) Same as above
(2) Replace the Cl
electrode.
Carry out reagent
priming and check
for bubble
formation.
Same as above
Same as above
(cont'd)