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OM-222 166 Page 27
6-4-1-2. Bake-Out
The bake-out process allows the operator to program a temperature and soak time as well as a cooling rate from bake-out if desired. When this
process is selected, the following screen appears on the display:
Mode......: Bake−Out
Control TC:>1
Soak Temp.: 600 Soak Time: 01:00:00
Cool Temp.: 200 Cool Rate: 600 _/Hr
Bake-Out Screen
The default position of the cursor is next to Control TC. Press the Increase or Decrease button to select the number of control
thermocouples to be used for the program. Selections are as follows: 1, 1,2, 1,2,3, or 1,2,3,4. TC1 MUST always be a control thermocouple. TC2
thru TC4 can be used for controlling or monitoring. When a thermocouple is selected as control, the LED adjacent to the seven-segment display
illuminates.
Use the Cursor button to move the cursor to the desired selection (Soak Temperature, Soak Time, Cool Temperature, or Cool Rate), and
press the Increase or Decrease button to change the value to the desired setting.
. The minimum and maximum soak temperature settings for bake-out are 0 and 10005 F(−18 and 5385 C). The minimum and maximum soak times
are 0 and 1000 hours. The minimum and maximum cool rates are 10 and 9999 5/hr. When the system is utilizing air-cooled blankets, the maximum
temperature setting is 4005 F(2045 C). If the program setting is above 4005 F (2045 C), the following screen will appear on the LCD display when
the Run button is pressed:
Maximum Temperature Message Screen
Cannot enter Run mode
Programmed temperature settings
exceed air cooled limits
(400 _F, 204 _C)
6-4-1-3. PWHT (Post-Weld Heat Treat)
The post-weld heat treat process allows the operator to program a post-weld heat treat where ramp temperature (on increase and decrease) and
ramp rates are the same. When this process is selected, the following screen appears on the display:
Mode......: PWHT
Control TC:>1,2
Ramp Temp.: 200 Ramp Rate: 600 _/Hr
Soak Temp.: 400 Soak Time: 01:00:00
PWHT Screen