Ise Calibration Alarm Check - Hitachi 902 Service Manual

5)

ISE Calibration Alarm Check

(
Alarm Name
Standard error
Slope abnormal
ISE prepare
Internal standard
concentration
abnormal
Calibration
abnormal
Alarm Check Method (alarm setting condition)
Calibration is invalid.
(Any of the following alarms has occurred; ADC abnormal, sample short,
calculation disabled, noise error and level error.)
(1) The slope for display is within the following range.
Na, K : Slope < 45.0 mV
Cl : Slope > -35.0 mV
(2) Electrode response is degraded (carry-over ratio is as given below).
Na : 0.232 < A
K : 0.160 < A
Cl : 0.490 < A
(1) The slope for display is within the following range.
45.0 mV ≤ Slope ≤ 49.9 mV or
Na, K :
68.1 mV ≤ Slope
-39.9 mV ≤ Slope ≤ -35.0 mV or
Cl :
-68.1 mV ≥ Slope
(2) Electrode response is degraded (carry-over ratio is as given below).
Na : 0.154 < A
K : 0.107 < A
Cl : 0.330 < A
The concentration of internal standard solution (C(IS)) is within the following
range.
Na : C (IS) < 120.0 mEq/L or 160.0 mEq/L < C (IS)
K : C (IS) < 3.0 mEq/L or 7.0 mEq/L < C (IS)
Cl : C (IS) < 80.0 mEq/L or 120.0 mEq/L < C (IS)
On each of the calibrator concentration and slope for display, the previous and
current values are compared and the result exceeds the COMPENSATE LIMIT
value.
Previous value - Current value
(Previous value + Current value)/2
× 100 (%) > COMPENSATE Limit
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