Hitachi 902 Service Manual page 58

No. Data Alarm
Level error
Slope abnormal
Electrode
preparation
Printer S. I/F
LEVEL L (ISE)
This error is indicated if the
mean potential is outside the
following range at three of the
five measuring points for each
test (on internal standard).
Na : -90.0mV ≤ EAV ≤ -10mV
K : -90.0mV ≤ EAV ≤ -10mV
Cl : 100.0mV ≤ EAV ≤
SLOPE? E (ISE)
(1) The slope level for display
(2) Electrode response is
PREP. R Upon calibration, the slope
value is within the following
range.
Na, K : 45.0mV ≤ Slope value
Cl
Description
⇒ OK
⇒ OK
180.0mV ⇒ OK
is within the following
range.
Na, K : SLOPE < 45.0mV,
Cl : SLOPE > -35.0mV
degraded.
(Carry-over rate is as
shown below.)
Na : 0.232 < A
K : 0.160 < A
Cl : 0.490 < A
≤ 49.9mV or
68.1mV ≤ Slope value
: -39.9mV ≤ Slope value
≤ -35.0mV or
-68.1mV ≤ Slope value
2 - 46
(cont
Remedy
•Set reagent and perform
ISE priming (with
reference electrode
solution) twice.
•Replace the electrode
and perform ISE
priming (with reference
electrode solution)
once.
•Retighten the nipple.
Or after replacing the
rubber packing, perform
ISE priming (with
reference electrode
solution) once.
•Confirm the proper
combination of tube and
reagent.
•Plug in the cord
properly.
•Replace the electrode.
•Remove the probe and
correct clogging.
•Set properly.
•Confirm the proper
combination of tube and
reagent.
•Make sure that the
standard solution and
reagent are set properly.
•Make sure that the
standard solution is free
from concentration or
deterioration.
•Make sure that the
electrodes (Na, K, Cl)
are within their
guaranteed life.
d)
'