ASXpress Operator's Manual - CETAC Technologies

ASXpress Rapid Sample Introduction System Operator’s Manual
Chapter 6: Maintaining the Rapid Sample Introduction System
6.4 6-Port Valve Replacement or Reorientation
The 6-Port valve Assembly has a finite lifespan that is dependent upon the
conditions/sample media to which it is exposed. Exposure to higher sample
solids levels reduces the valve lifespan.
To determine whether the 6-Port valve requires replacement, inspect the unit
for these conditions:
• Valve dripping/leaking from overflow hole behind port #4 at bottom
of valve body
• With no other apparent problems, air present in the lines (indicating a
leak/poor seal).
The valve can also be reoriented so that the nebulizer port is as close as
possible to the nebulizer.
Note that any time the 6-port valve body is removed from its actuator, the
valve will require retraining (reinitialization).
To replace or reorient the 6-port valve:
1 Unplug the valve/pump module cable from the electronics module.
Do not turn off or unplug the electronics module.
2 Remove the tubing/connectors on the 6-port valve.
3 Using the provided hex key, loosen the hex nut which secures the valve
to the body of the valve/pump module.
4 Place the pump/valve module on its back, on a tabletop.
5 Firmly but carefully pull the valve straight up.
Now, before you reinstall the valve, retrain the valve actuator:
6 In the Xpress Config software, select the “Load” button then the
“Inject” button. Do this twice.
7 Plug the valve/pump module cable back into the electronics module.
8 In the Xpress Config software, select the “Load” button then the
“Inject” button.
9 Insert the new valve, or reinsert the existing valve, at the desired
angle. Rotate it so that the nebulizer port will be as close as possible to
the nebulizer.
10 Press down on the valve so that it is completely seated.
11 Inspect the valve to verify that there is no gap between the valve and
the collar on the valve/pump module.
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