Reaction Tray Mixers; Reaction Tray Mixer Operation - Siemens ADVIA 1800 Operator's Manual

Reaction tray mixers

The reaction tray (RRV) mixers (MIXR1 and MIXR2) stir the contents (sample and
reagent) of RRV cuvettes brought to their respective mixer positions.
Mixing is performed using a using a paddle that spins and reciprocates. Strong and weak
stirring options are available.
Both mixers are located near their corresponding reagent probes. MIXR1 mixes sample
with reagent 1 (R1), and MIXR2 mixes sample with reagent 2 (R2).
Figure 1-22. Reaction tray mixers

Reaction tray mixer operation

At initialization, the mixers move to their mixer positions, then go to the down position. If
a mixer is already at the mixer position, it is raised, then lowered.
During each half-turn on the RRV, the following steps occur (this sequence applies to each
mixer; the mixers used depend on the analysis conditions):
1. The mixer moves up and over to the wash port, where it is washed with deionized
water. During this period, the reaction tray mixer wash valve (MWEV1 or MWEV2)
is open (depending on the mixer being washed), and (briefly) the mixer rod is on.
2. The mixer moves up and moves to the mixer position, where it lowers into the RRV
cuvette.
3. The rod turns on to mix the sample and reagent.
4. The mixer moves up from the cuvette and moves back to the wash port.
5. The next cycle begins.
If an assay is not running, you can operate the unit manually at the Manual Operation
window.
System Overview
1 Mixer 1 (MIXR1)
2 Mixer 2 (MIXR2)
3 Wash Ports
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