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OPERATOR MAINTENANCE
Optional: Obtain a temperature reference device. A calibrated digital thermometer with a vacuum-
rated thermocouple feedthrough. The device must be accurate to at least 0.1°C.
Diagnostic Setup
1. The unit must be connected to a power source that meets the requirements in the Installation chapter
(page 19) and turned on.
2. Optional: secure the reference temperature device sensor probe at the center of the bottom shelf, with
the probe head in direct contact with the shelf surface.
3. The oven chamber must be sealed and be under vacuum. See the Place the Chamber Under Vacuum
entry on page 35.
4. The unit must have adequate time to come up to temperature and stabilize. Failure to wait will result
in an inaccurate diagnosis.
• Allow 120 minutes for the unit to achieve 150°C or 175 minutes to achieve 220°C. The
unit cannot come up to temperature and stabilize faster than these rates.
• Start the Diagnostic Data Procedure when the allotted time has passed, even if the
unit fails to achieve the setpoint temperature.
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