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1Ć21
Learning About the System
The hemolyzer uses ultrasonic sound vibrations to rupture red blood cell
membranes and release hemoglobin molecules. These vibrations also rupture other
cells in the sample, reducing the light scattering from whole cells that can interfere
with hemoglobin analysis in the sample chamber. All CO-ox module samples pass
through the hemolyzer before entering the sample chamber.
The electronic components direct the operation of all system components. The
electronic components communicate with fluidic, measurement, and CO-ox
module components, and with external devices. The electronic components obtain
information from the sensors and perform all calculations required to determine
reported parameters. Table 1-2 describes these components and their functions.
Power Supply Converts the line voltage from AC to DC and then
provides power to the rest of the system
Real Time
Processor (RTP)
Sends commands to other PC boards to perform system
activities; the RTP controls the fluidic system, acquires
data from the measurement module, calculates parameters,
and communicates with the user-interface processor
User-Interface Processor
(UIP)
Controls user interaction with the screen, the bar code
scanner, the printer, the database, and the external
communication ports
Backplane Distributes power to each of the attached PC boards; the
backplane connectors route signals to electronic and
electromechanical subsystems
Control Board Contains all of the drivers to control the fluidic system
valves and pumps, the preheater, and the sample port
Data Acquisition System
Board (DAS)
Performs the analog to digital conversion for a selected
measurement channel; after the conversion, the data is sent
to the RTP PC board for any required calculations
Printer Control
Receives information from the UIP and directs the roll
printer to print reports
(Continued)