PerkinElmer AVIO 500, Руководство по оборудованию и обслуживанию для клиентов

Страница: 330 / 355

328
Troubleshooting
Plasma Ignition and Stability Problems
Plasma Ignition Problems
Possible reasons for unsuccessful ignition follow. Correct the problem, if
possible, and then try to ignite the plasma again.
• If the plasma will not light check the ignitor. Open the door to the torch
compartment. Check that the ignitor contact finger is making contact with the
Problem Possible Cause(s) Corrective Action
Cannot get
suggested
detection
limits
(continued) The standard may have too
high a concentration. The standard should be 100 times the
estimated detection limit.
You may not be comparing
the appropriate value for the
wavelength you are using. Confirm that you are using the appropriate
wavelength and recheck the value. Refer to
the Syngistix Software Guide on the
Syngistix Document Pack CD for details
..
General
performance
problems Performance problems such
as poor precision or loss of
signal can often be traced to
the setup and condition of the
sample introduction system.
You are having difficulty
getting values for silicon in
samples with HF.
See the section Checking the Sample
Introduction System on page 320 .
Use a sapphire injector.
Unexplained
background
shift The torch or injector may be
coated with a deposit that
reflects light, resulting in a
periodic background shift. Replace the torch and injector.
Table 6-16. Performance Problems: Troubleshooting Table