Bayer HealthCare RapidPoint 400 Series Service Manual page 34

The sliding valve consists of a luer, a luer mount, a probe, a probe clamp,
a luer mount cover, a luer mount extension, and a valve seal. The luer and
capillary seal are replaceable. Valve movement is controlled by a valve
actuator motor and a position detector system. The position detector
system accurately positions the valve using two position sensors, which
are part of the cartridge interface.
The sliding valve has nine positions, each of which allows fluid, air, or
sample to be pumped through a thin stainless-steel probe in the center of
the valve. The probe remains stationary while the valve moves back and
forth around the probe to change the hydraulic path of the system.
The following table shows the valve positions and their functions:
Position Name
SYRINGE_POS
Vent AQC
Zero Reagent Load
Hematocrit Reagent
Load
200 Reagent Load
Wash Reagent Load
Luer Wash
Capillary Aspiration
Vent
Syringe Aspiration
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Function
moves the valve to place the probe tip into the syringe
creating the fluid path for sample aspiration
controls the aspiration of an external QC sample, using the
front hole of the probe
aspirates the Zero Calibration Reagent into the sensor
module, using the rear hole in the probe
aspirates the Hematocrit Calibration Reagent into the sensor
module, using the rear hole in the probe
aspirates the 200 Calibration Reagent into the sensor
module, using the rear hole in the probe
delivers steady wash to the sensor module, using the rear
hole in the probe
empties the luer area from a port in the bottom of the sample
entry, using the front hole of the probe and aspirates capillary
samples while the device is in place
aspirates samples from capillary tubes, using the front hole
in the probe
provides an opening to advance syringe samples while the
device is in place
aspirates syringe or QC samples
Rev. C