CELL-DYN
®
3200 System Operator’s Manual
9-53
9140181H—October 2001
Section 9
Service and Maintenance
Normally Closed Valve Tubing Replacement
Tubing in the Normally Closed Valves should be replaced when it shows signs of
indentation or flattening and is impeding the flow of fluid through the tubing.
Materials Required
1. Valve Tubing (12 inches)
2. Gloves, lab coat, and safety glasses
3. Phillips-head screwdriver (#2)
4. Hemostats (2)
Procedure
1. In the
MAIN MENU
, press
[SPECIAL PROTOCOLS]
followed by
>
DAILY
SHUTDOWN]
. Wait until the instrument is in STANDBY, then turn the power
switch OFF.
2. Gently pull on the hand hold of the Right Front Cover and swing the cover
open.
3. Gently pull on the hand hold of the Left Front Cover and swing the cover
open.
4. Pull the Tower cover up and off the instrument (Tower Door on the CS model
must be open).
5. To gain access to the lower portion of the Flow Panel:
a. On the CS model, remove the four Phillips-head screws holding the Front
Skirt to the instrument and remove the skirt.
b. On the SL model, remove the section on the left side of the Flow Panel
by lifting it up and off the holding pins on the rear rail of the Sample
Loader.
6. Locate all six Normally Closed Valves on the Flow Panel. (Refer to Figure
9.4.)
7. Use hemostats to clamp the tubing above and below the normally closed
valve tubing connectors to prevent leakage when the normally closed valve
tubing is replaced. Remove the tubing from each valve.
NOTE:
On the SL model, space is limited between the inner edge of the
Sample Loader and the two normally closed values on the lower
left side of the Flow Panel. Use caution when accessing the tubing
in these two valves.
8. Pull the tubing from the connectors on either side as shown in Figure 9.21.