CHAPTER 4: OPERATING INSTRUCTIONS
UNIFLOW
®
4 PULSED HEAT CONTROL
990-908 4-13
10. Press the COOL1 key to select the COOL1 temperature value for editing. Use the keypad to
enter a COOL1 temperature of 100C, then press the ▲ key.
11. If using a Postheat process cycle, press the POSTHEAT key to select the POSTHEAT temperature
value for editing. Use the keypad to enter a temperature 200C, then press the ▲ key.
12. Press the POSTHEAT key twice to select the POSTHEAT time field for editing. Use the keypad
to enter a POSTHEAT time to 02.0 (2.0 seconds), then press the ▲ key.
13. Press the COOL2 key to select the COOL2 temperature value for editing. Use the keypad to
enter a COOL2 temperature of 80C, then press the ▲ key.
Note: In the above sequence the ▲ key was pressed to save an entry. For fewer key presses
when changing both temperature and time for a process period, the specific process key can
be pressed to save the temperature and move the cursor highlight to the time field. For
example, after entering a temperature for BASE, press the BASE key to save the temperature
and move the cursor to the Base time field.
14. Make a test joint by pressing the foot pedal or foot switch to initiate a complete heating cycle.
For manual reflow soldering heads, release the foot pedal when the alarm “beep” sounds
indicating that the thermode has reached the COOL temperature.
For air actuated reflow solder heads, release the foot switch after the head has
automatically retracted the thermode.
15. If the joint is good, use the present Control settings for your soldering application. If it is not
good, go to Step 16.
16. Repeat Steps 8, 9, 10 and 14, and use the keypad to increase the REFLOW temperature in 25C
increments. Make a test joint after each REFLOW change.
17. Upon reaching a temperature of 450C, use the keypad to increase the TIME in 0.5 second
increments, repeating 8 and 14 until you have achieved a good joint.
NOTE: If the process does not require a POSTHEAT cycle, then the POSTHEAT time should be set
to zero. If the
POSTHEAT time is set to zero, both the POSTHEAT and COOL2 will not execute and
COOL1 will be the last programmable process step.
Display Backlight On/Auto
The Display backlight can be set to remain always on or to turn off if there has not been any process
starts or key presses in a 3 to 4 minute period. This feature is selected in the Control Setup screens. If
the backlight is set to turn off if there is a period of inactivity, press any key on the front panel to turn on
the backlight. The first press of any key when the backlight is off will not execute the function of the
button.
To Next Page
Loading...