Miller Electric ProHeat 35 - Manual (Page 32)

OM-222 166 Page 26
To reset the system back to factory default settings, turn off the power source, and wait until the display goes blank. Turn on the power source. When
the display lights, press and hold the Increase and Decrease buttons. A message will display Press Program to reset factory
defaults. Release the Increase and Decrease buttons, and press the Program button.
6-4. Programming
Programming allows the operator to setup a program for a particular heating process. The selections available are either Temperature control or Manual
control.
6-4-1. Temperature-Based Control
Temperature-based control operates the system and controls the heating process based on temperature feedback from thermocouple inputs. Ther-
mocouples must be used for this mode of operation or the system will not operate. Within the temperature-based mode there are four different
processes available as follows: Preheat, Bakeout, PWHT (Post-Weld Heat Treat), and Custom Program.
Press the Program button to access the programming mode. Use the cursor button to move the cursor to the desired temperature-based process,
then press the Program button again to select the process.
6-4-1-1. Preheat
The preheat process is a simple method of heating material to a desired temperature and holding that temperature for a specific period of time.
When this process is selected, the following screen will appear on the LCD display:
Mode.......: Preheat
Control TC.: 1
Temperature: 400
Soak Time..: 01:00:00
Preheat 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 (Temperature or Soak Time), and press the Increase or
Decrease button to change the value to the desired setting.
.
The minimum and maximum temperature settings for preheat are 0 and 10005 F (−18 and 5385 C). The minimum and maximum soak times are
0 and 1000 hours. 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)