Siemens ADVIA 2400 Maintenance Procedures page 56

stable for one week when stored at room temperature. Minimum recommended
volume is 200 mL bleach plus 800 mL of deionized distilled water.
NOTE
The remainder of this procedure describes the steps to clean the WUD and DWUD wash
stations. Perform the entire procedure for the WUD lines and nozzles, then repeat the
entire procedure for the DWUD lines and nozzles. The various parts are described as the
"DWUD/WUD," meaning one or the other, depending on which is being cleaned at the
time, and does not mean both simultaneously.
2. Prepare the WUD/DWUD for cleaning:
a. With the system in READY mode, log on as
b. Place paper towels on top of the RRV and DTT cuvettes directly under the
WUD/DWUD nozzles as a precaution.
c. Using a 4-mm hex wrench, loosen the captive screw (1) that secures the
WUD/DWUD wash head to the WUD/DWUD mechanism.
Figure 5-34. WUD and DWUD captive screw
d. Lift up the WUD/DWUD wash head and place it in a shallow plastic tray on top
of the paper towels.
NOTE
Use a shallow tray for washing the nozzles. A tray with a depth of 35 – 40 mm is
most suitable. Trays with higher sides may require additional wash solution.
e. Place the dryer nozzle outside the tray (1) and all the other nozzles inside the
tray.
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supervisor
ADVIA 2400 Operator's Guide