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

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306
Maintenance
value is too high for this element, heat the tube manually at 2500 °C for 10
seconds and then repeat the ‘dry fire’.
To enter the temperature manually and heat the furnace:
1. On the Toolbar, click on Furnace Control .
2. In the Furnace Control window, click on the Cleanout Temp. entry field and
type the required temperature (e.g. 2400 °C).
3. Click on Start to heat the furnace.
The furnace is heated to the selected temperature and continues to heat until
you stop it.
4. After about 10 s, click on Start again to stop furnace heating.
Changing the graphite contacts
Change the graphite contacts when one or both contacts are badly contaminated.
Contacts should be changed on a routine basis. Always change both contacts at
the same time.
Summary of the procedure
Always change the graphite contacts in the following sequence:
1. Open the furnace and remove the graphite tube (see To open the furnace for
contact change: on page 307 ).
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
Do not heat the graphite furnace for longer than about 10 seconds when the
temperature exceeds 2000 °C. Heating for longer periods will markedly
reduce the lifetime of the graphite tube.
!
Warning