Document #107-00092-001
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selected oven schedule will become active. If batch report is not active, the oven will start
immediately after the Start Oven button is pressed. If batch report is active, the user will be
promped to enter the operator name and batch id.
As soon as the oven is started, the text for the Start Oven button changes to Stop Oven. The
current segment number in the schedule and the time remaining for that segment are displayed in
the corresponding text boxes under the Stop Oven button.
An oven schedule is a series of programmed steps that complete an entire vacuum bake-out
process.
For a wall heated oven, there are four temperatures displayed just under the label “Left Oven
Temperatures” or “Right Oven Temperatures” for the left or right oven, each representing the
temperature of side (left or right), top, bottom and rear walls of the oven. The temperatures are
updated every second.
The oven stops when the oven schedule is done or when the Stop Oven button is pressed. The
text of the Stop Oven button changes back to “Start Oven” after the oven stops.
If the user presses the Start Oven Button when the selected oven schedule is empty, a message
will be issued telling the operator that the schedule is empty and ask the operator to select a
different oven schedule to run.
If an oven is currently running an oven schedule, any attempt to open the inner or outer door of
that oven is denied and a message is displayed. At the completion of the oven schedule, the
operator is allowed to open the oven’s inner door to pass the parts in the oven to the enclosure.
Access to the outer door is allowed only after the inner door is opened at least once at the
completion of an oven schedule.
If the oven is stopped prematurely by pressing the Stop Oven button, then access to either the
inner door or the outer door is allowed.
Create and Edit an Oven Schedule
An oven schedule defines the required oven states and the time duration for each state for a
particular bake-out cycle. The oven states in an oven schedule include oven temperature, oven
vacuum or backfill condition, and oven chamber vacuum pressure. Each oven state and its time
duration in an oven schedule are called a segment. Generally, an oven schedule contains one or
more segments.
A segment consists of four to five parameters depending on the Segment Condition parameter
setting. The first parameter in a segment is the Segment Number starting from one for the first
segment in the schedule. The second parameter is the Temperature Set Point in degree centigrade
for the segment. The third parameter is the Time Duration of the segment in hours. The fourth
parameter is the Segment Condition parameter. The Segment Condition can be set to Vacuum or
Backfill. The last parameter is the Vacuum Pressure Set Point, with pressure units of Torr, and is
only valid if the Segment Condition for the segment is set to Vacuum.
There is one more parameter in an oven schedule called Oven Control Method, which controls
how the time duration for each segment is calculated. This parameter can be set to one of three
