PerkinElmer AVIO 200, Hardware Manual

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Troubleshooting
276
• Check that the injector is not clogged. You will need to remove the Quick-
Change Torch Module and disassemble the torch as described in Quick-Change
Adjustable Torch Module on page 173. Remove the spray chamber and either
remove the torch and then the injector or remove the injector leaving the torch
in place.
Performance Problems
Checking the Sample Introduction System
Many performance problems (such as poor precision or loss of signal) can be traced
to the setup and condition of the sample introduction system.
The following list describes general checks for the sample introduction system,
which should be done on a regular basis. Typical symptoms of problems are listed to
help you determine whether maintenance is required.
If you have already done performance checks, refer to the Syngistix Software Guide
on the Syngistix Document Pack CD for details
.
The sodium bullet test is also a good way of visually checking the sample flow in the
plasma and, therefore, indicates problems in sample introduction. This test is
described earlier in this chapter.
Pump and Pump Tubing
Is the tubing overstretched, or does it have flat spots, leaks, or discoloration?
Install new tubing, stretching it gently beforehand. If using organics, special tubing
should be used. See the list of replacement parts at the end of
Replacement Parts:
General on page 260.
Is the flow of liquid irregular?
Refer to the adjustment procedure in Adjusting the Pump Tubing on page 252.
Do the pump rollers bind or not roll easily? Are there grooves in the pump rollers?
On the PerkinElmer pump, the pump head may be removed for cleaning. The pump
head may also be replaced. See
Removing the Pump Head on the Peristaltic Pump
on page 253.