Fluidic System
analyzer in time.
2.4.3 Washing module
The flushing module includes: washing the exterior and interior of the sample
probe; washing the front and back bath; flushing the aperture and flushing the
fluidic lines.
2.4.3.1 Washing exterior and interior of sample probe
The part that washes the sample probe is shown in Figure2-5. The washing
consists of two procedures – washing the exterior and washing the interior.
1. To wash the exterior：The plunger of the 10mL syringe moves downward to
aspirate diluent from the NO end of valve 6. Then the plunger moves upward and
valves 6 and 5 are open so that the aspirated diluent is dispensed, through the
NC end of valve 6, NC end of valve 5 and valves 4 and 3 to the lower part of the
probe wipe. Then the pump functions to open valves 9 and 10 to introduce a
negative pressure on the upper part of the probe wipe. Because of this negative
pressure, the diluent dispensed to the lower part of the probe wipe is transferred
to the upper part and washes the exterior through the up-and-down movement of
the sample probe.
2. To wash the interior：The plunger of the 10mL syringe moves downward to
aspirate diluent from the NO end of valve 6.Then the plunger moves upward to
dispense the aspirated diluent, through valves 5 and 6 and the buffer tubing, to
the sample probe to wash the interior.
BC-2800 Auto Hematology Analyzer (V1.0) 2- 7
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