CELL-DYN
®
3200 System Operator’s Manual
9-59
9140181K—July 2002
Section 9 Service and Maintenance
Y Valve Cleaning
The Y Valve should be cleaned whenever an obstruction in the valve is suspected.
If an obstruction in suspected in the Open Mode, follow the instructions in
Procedure - Open Mode below. If the Obstruction is suspected in the Closed Mode,
follow the instructions in Procedure - Closed Mode which follows
Procedure - Open Mode.
Materials Required
1. Gloves, lab coat, and safety glasses.
2. Two Syringes (10 cc) with at least 3" of l/16" ID X 3/16" OD silicone tubing
attached to the tip of each syringe. Attached to each tube should be a l/16" to
l/16" connector.
3. Medium sized beaker or comparable container.
4. Deionized water
5. Cleaning solution (1.25% sodium hypochlorite solution). See the formula for
mixing this solution under Decontamination Procedures earlier in this
section.
Procedure - Open Mode
1. If the system is not already in Open Mode, press the [CHANGE SAMPLER] soft
key in the RUN menu to select Open Mode.
2. In the MAIN MENU, press [SPECIAL PROTOCOLS] followed by [DIS/ENAB
ANALYZER] and [DISABLE ANALYZER].
3. Gently pull on hand hold of the Right Front Cover and swing the cover open.
4. Lift the Tower Cover up and off of the Instrument.
5. Disconnect the tubing attached to the top of the Open Sample Probe.
6. Fill one of the syringes with the prepared cleaning solution. Fill the other
syringe with deionized water.
7. Attach the syringe with the cleaning solution to the tubing that had been
connected to the Open Sample Probe.
8. Locate the Tygon
®
tubing between the Y Valve and Shear Valve. Refer to
Figure 9.23.
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