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8.6 HYDRAULIC DESCRIPTION
The hydraulic part of the MYTHIC 22 is very simple and made of these modules:
- Sampling module,
- Counting bath module,
- Syringes module,
- Optical manifold,
- Optical bench.
The modules are connected together by semi rigid tubing.
8.6.1 Sampling module
This module (patent pending) enables to draw the sample and to perform the WBC and RBC/PLT dilutions.
It is assembled with a rotating rocker moving around a support which maintains the system to move up and
down the sampling needle.
A very reliable system of rack-gear moves the rocker.
The cleaning system of the sampling needle can be removed without tool (see section 9.4.2.).
The o-ring of the needle included in the cleaning system can also be removed without tool (see
section 9.4.2.).
The maintenance of these parts is very easy to perform.
8.6.2 Counting bath module
This module allows to count the WBC and RBC/PLA and to measure the HGB.
It is made with a manifold maintaining the reagent commutation valves and the counting bath block with their
measurement block including the apertures.
The counting bath block assembly and these apertures can be removed without tool (see section 9.4.3.,
9.4.4., 9.4.5.).
8.6.3 Syringes module
This module (two patents pending) enables:
- to draw the sample,
- to distribute the reagents,
- to drain the baths,
- to do the vacuum necessary for counting,
- to push the waste to the waste container,
- to push the WBC sample and the diluent sheath in the flow cell .
It is made with a manifold maintaining the fluid commutation valves and with the syringes block, including
five syringes :
The sampling syringe,
The lyse syringe,
The two waste and vacuum/pressure syringes,
And the diluent syringe.
Only one motor drives the five syringes.
The diluent input and the waste output are also included in this manifold.
8.6.4 Optical manifold
This manifold allows driving the different reagent toward the counting bath module or toward the optical
bench. It maintains seven commutation valves.
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