85
The Column Oven
Oven safety
Oven safety
For safety, opening the oven door turns off power to the oven heater, fan, and
cryogenic valve (if installed) but maintains the setpoints in memory.
Closing the oven door returns the oven to normal operation.
If the oven cannot attain or maintain an entered setpoint temperature during
normal above-ambient operation, a problem is assumed and the oven is switched
off.
Possible problems include:
• The oven vent flaps not working
• The oven fan, heater, or temperature sensor not working properly
• An electronic problem
When a shutdown occurs, the Off line in the oven control table blinks and the
oven remains off until switched on again via [Oven] [On] or by editing the Temp
setpoint in the oven control table.
When the oven shuts itself off, the following display appears:
See chapter 12 in this volume for more information on shutdowns.
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