PN 177196BB
8-5
SYSTEM DIAGNOSTICS AND MAINTENANCE
ACCESSING AND IDENTIFYING ANALYZER HARDWARE COMPONENTS
8
Table 8.1 Fluidic and Mechanical Modules/Components
Component/Module Functions
Bar-code reader (internal) Reads the cassette and specimen tube bar-code labels.
Bath enclosure area interlock Prevents the Analyzer from cycling when the right-side panel is removed.
Bath enclosure heater Maintains the temperature in the bath enclosure area.
Baths assembly A collection of baths which, with the exception of the RINSE bath, hold the sample
dilutions in a temperature controlled area for mixing and analysis. The RINSE bath
collects waste from the sampling probe.
Cassette ejection pushers Pushes the cassettes onto the cassette output tray for retrieval by the Operator.
Cassette input mechanism motor Operates the cassette loading pushers.
Cassette input stop-left switch Stops the cassette input mechanism motor.
Cassette input stop-right switch Stops the cassette input mechanism motor and signals that a cassette is present.
Cassette loading pushers Push the cassettes from the cassette input tray onto the transport track for pickup
by the cassette transfer mechanism.
Cassette output position switch Stops the cassette transfer mechanism motor when the cassette reaches the
position for ejection onto the cassette output tray.
Cassette position-left switch Works in conjunction with the cassette position-right switch to keep track of the
position of the cassette, telling the computer which tube will be pierced next.
Cassette position-right switch Works in conjunction with the cassette position-left switch to keep track of the
position of the cassette, telling the computer which tube will be pierced next.
Cassette transfer mechanism motor Moves the cassette transfer mechanism left and right along the transfer track.
Note: Because the motor can run in reverse, a cassette can be moved back to the
sampling area to rerun a specimen.
Cassette transfer mechanism Picks up a cassette from the cassette input tray, moves the cassette along the
transfer track for mixing, identification by the bar-code reader, and sample
aspiration, then deposits the cassette in front of the cassette output tray and
activates the cassette ejection pushers.
Count syringe Provides the vacuum needed for:
r Counting WBCs and BASOs.
r Counting RBCs and PLTs.
r Draining the WBC bath via isolator 3.
Counting heads The external electrodes used for applying the Coulter Principle to the cells in the
RBC and WBC/BASO baths.
DIFF (flow cell) lamp Provides the light for determining the absorbance readings on the stained WBC in
the flow cell.
DIFF syringe assembly Contains three syringes, from left to right - the inner sheath, the outer sheath, and
the sample injector. This assembly:
r Dispenses a measured amount of Diluent in the DIFF bath to stop the
cytochemical reaction.
r Injects the sample into the flow cell.
r Dispenses the inner and outer sheath Diluent to the flow cell.
Diluent reservoir r Holds the Diluent needed for an analysis cycle.
r Eliminates risk of Diluent degassing as it is aspirated by syringes.
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