System Overview 29
Reagent probes
1)
Reagent probe 1 (RP1)
2) Reagent wash pump 1 (RWP1)
3) Reagent wash pump 2 (RWP2)
4) Reagent probe 2 (RP2)
Figure 1-21 Reagent probes
Reagent pumps
1)
Reagent pump 1 (RP1)
2) Reagent pump 2 (RP2)
3) Reagent wash pump 1 (RWP1)
4) Reagent wash pump 2 (RWP2)
Figure 1-22 Reagent pumps
The reagent pumps (RP1 and RP2) withdraw reagent from the reagent trays, and also
discharge the reagent into the RRV cuvettes. The reagent probes execute both actions.
During both actions, the reagent pump valves (RPEV1-1, RPEV2-1, RPEV1-2, and
RPEV2-2) are closed.
After the reagent is aspirated, the probes move to the wash ports, where their outsides are
washed. RPEV2-1 and RPEV2-2 (wash cup valves for RPP1 and RPP2, respectively) are
open during this process. This allows water to flow over the outside of the probes.
After the reagent is dispensed, the probes move back to the wash ports, where their
insides are washed. RPEV1-1 and RPEV1-2 (valves for RTT1 and RTT2, respectively)
open, allowing the sample and reagent wash pump (SRWP) to send degassed water
through the probes’ insides.
After the wash, the water drains down the wash port.
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