PerkinElmer PINAACLE 900 Series, Руководство по оборудованию и обслуживанию для клиентов

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Maintenance
3. Heat out the graphite tube to remove contamination (see Manually Heating the
Graphite Tube on page 292 ).
Changing the Contact Cylinders
Change the graphite contacts when one or both contacts are badly contaminated
or show visible pits and small cracks. Always change both contacts at the same
time.
Used contact cylinders should not be used again, as the contact may not be
optimal, and the performance may be impaired.
To Open the Furnace For Contact Changes
1. Make sure that the furnace is cool.
Warning: High Temperatures – Risk of Burns
The graphite furnace can generate very high temperatures. Do not touch
any parts of the furnace, especially the graphite components, until they
have cooled to room temperature.
Note
It is recommended that you visually inspect the contact cylinders for wear
and tear and also for corrosion on the surfaces of the cylinders. If there is
visible wear and corrosion on the surfaces, then the contacts should be
replaced, since this can impact the quality of the analytical results.
Unexplainable spikes on the peak profile of the analysis are also an
indication that the contact cylinder is wearing off and may need to be
replaced. The precision of the analysis degrades once these components
start to show signs of wear and tear.
Note
If the graphite tube breaks inside the contact cylinder, you must clean the
contact cylinder/furnace housing thoroughly and may have to replace the
contact cylinder.
!
Warning