Hitachi 902 - Examples of Evading Procedure; Measure for ISE; Specification from Screen; Probe Washing Cycle

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(V) Probe washing cycle
Probe washing employs one (1) machine cycle.
Within one machine cycle, the specified detergent (system water) placed on the
reagent disk is aspirated in the specified volume and discharged into the cell at
the same timing as for reagent aspiration and discharge.
(VI) Measure for ISE
Of the reagents for ISE, the internal standard solution and diluent are applicable
to carry-over evasion. Carry-over evasion cannot be specified for reference
electrode solution.
(VII) Specification from screen
From the screen, the following need be specified; a carry-over giving test and
its reagent type (R1, R2, R3), a carry-over receiving test and its reagent type
(R1, R2, R3), detergent set position on the reagent disk and detergent volume.
An example of specification is shown below.
[GPT] [1] [LDH] [4] [38] [350]
↑ ↑ ↑ ↑ ↑ ↑
(VIII) Examples of evading procedure
Examples of carry-over evading procedure are shown below.
A to C represent tests, and W stands for washing.
Example of Carry-over
Evasion-specified Pattern
Example of Evading Procedure
A
R3
B
R2
A
R3
C
R2
(example of succeeding in evasion by
change in channel registration)
A
R3
B
R3
A
R3
W B
R3
A
R3
B
R1
A
R3
W B
R1
Reagent
type
(1:R1
2:R2
3:R3)
Carry-
over
giving test
(CH1 to 36)
Carry-
over
receiving
test
(CH1 to
36, ISE
ALL)
Reagent
type
(1:R1
2:R2
3:R3)
Detergent set position
(1 to 39...ISE excluded
1 to 36,39...ISE
allowed
W1..........System
water)
Detergent
discharge
volume
(50 µL to
350
µ
L)