CHAPTER 3: USING PROGRAMMING FUNCTIONS
UNIFLOW
®
4 PULSED HEAT CONTROL
3-18 990-908
3. Enter 500 with the keypad.
Press the GRAPH key to store
the new Reflow temperature
value to Heating Profile 1. The
graph will now display 500 as
shown on the right.
Saving Changed Values
When you change values, they are saved in the Control’s flash memory (“flash” for short) when the
GRAPH, DATA, COUNTERS, HEATING RATE, or SETUP screens are used.
CAUTION: Before you power down, go to one or more of the screens above and verify your changes.
If you do not use one of these screens before powering down, your changes will not be saved.
NOTE: While data is being saved to flash, the screen will display ***** SAVING CHANGES *****
HEATING RATE Key
The HEATING RATE key brings up the MANUAL TUNING screen. This screen
allows you to go to the SET COARSE HEATING RATE and SET FINE HEATING
RATE
capabilities to match the heat generating capability of the thermode to
minimize the temperature overshoot and undershoot.
For example, given a very small peg-tip thermode with a heat generating tip diameter of 0.020 inch
(0.5mm), the COARSE heating rate should range from VERY SLOW to SLOW to prevent severe
temperature overshoot.
Selecting
1 on the MANUAL TUNING screen
brings up the SET COARSE HEATING RATE
screen.
<SET COARSE HEATING RATE >
1. Very Slow Medium
2. Slow
3. Medium
4. Fast
Number Select an item, Graph / Data
The progression from Very Slow to Fast provides more energy to heat the thermode. The table below is
a guide to optimize the coarse heating rate. Change
COARSE HEATING RATE to optimize temperature
profile output.
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