Dilution Tray Mixer; Dilution Tray Mixer Operation; Dilution Tray Wash Mechanisms - Siemens ADVIA 1800 Operator's Manual

If an assay is not running, you can operate the unit manually at the Manual Operation
window.

Dilution tray mixer

The dilution tray (DTT) mixer (DMIX) stirs the contents of DTT cuvettes brought to the
mixer position. Mixing is performed using a reciprocating rod.
Figure 1-18. Dilution tray mixer

Dilution tray mixer operation

At the time of system initialization, the mixer moves to the mixer position, then goes to
the down position. If it is already at the mixer position, it is raised, then lowered.
During each 3-second cycle on the DTT:
•
The mixer moves up and over to the wash port, where it is washed with deionized
water. During this period, the dilution mixer wash valve (DMEV) is open, and
(briefly) the mixer rod is on.
•
The mixer is raised and moved to the mixer position, where it is lowered into the DTT
cuvette. The rod is turned on to mix the sample.
• The mixer is raised from the cuvette and moved back to the wash port. The next cycle
begins.
If an assay is not running, you can operate the unit manually at the Manual Operation
window.

Dilution tray wash mechanisms

The dilution washer (DWUD) washes dilution tray (DTT) cuvettes after sample analysis is
complete, so they can be reused without risk of contaminating the next sample.
The DWUD has three nozzles, each performing a stage of the wash. Each nozzle works on
a different cuvette, so the DWUD washes three cuvettes simultaneously. The cuvettes are
being washed in different stages at the same time.
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1 Dilution Mixer (DMIX)
ADVIA 1800 Operator's Guide