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

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Graphite Furnace Maintenance for the PinAAcle 900T/900Z
Heating The Graphite Tube to Remove Contamination
You can sometimes remove contamination from the graphite tube by heating the
tube. Heat the graphite tube manually at 2500 °C for approximately 5 seconds
(see
Manually Heating the Graphite Tube on page 292 ).
You may need several cycles to remove this element. Discard the tube for this
element, as this element is the contaminant. This tube may still be clean for other
elements and could still be used for other elements. But if there are stubborn
deposits in the tube that you cannot remove, discard the tube and use a new one.
Cleaning the Contact Surfaces of the Graphite Tube and Contacts
1. Open the furnace and remove the graphite tube (see Removing the Graphite
Tube on page 260 ).
2. Use a dry, clean swab to clean the inside of the contacts, especially around the
apertures where the radiation beam enters and exits.
Remove any particles from inside the contacts using clean, dry compressed
air.
Be careful not to scratch the inner surfaces of the contacts.
If the surfaces of the contacts are pitted or cracked, remove the contacts and
install new ones (see
Changing the Contact Cylinders on page 270 ).
Warning: UV Radiation – Risk of Eye Damage
When the graphite furnace is heated to incandescence (approximate
temperature, such as higher than 800 °C.), e.g. during the pyrolysis and
atomization steps, the furnace can emit UV radiation which can damage
your eyes.
Always wear UV-absorbing safety glasses when looking at the
furnace.
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.
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Warning
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Warning