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OPERATOR MAINTENANCE
Diagnostic Setup
1. Check the primary chamber gasket for damage. This is the gasket mounted either on the chamber
liner or the door that seals the oven chamber when the door is closed.
Look for:
• Cuts or nicks on the gasket caused by removing shelves or samples
from the chamber.
• Cracking, brittleness, or loss of elasticity.
• Discoloration of the gasket.
• Nicks or other damage on the surface the gasket seals against.
2. The unit must be connected to a power source that meets the requirements in the Installation chapter
(page 19) and turned on.
3. Do not heat the oven. The oven must remain at ambient temperature for this procedure.
4. The oven chamber must be empty, sealed, and under full achievable vacuum levels. See the
Evacuating the Oven Chamber entry on page 35.
Vacuum Gauge
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