CHAPTER 3: USING PROGRAMMING FUNCTIONS
UNIFLOW
®
4 PULSED HEAT CONTROL
990-908 3-7
Press the 4 through < keys to edit the high
and low limits for the peak and average
temperatures. The number entered will
be the difference between the profile set
temperature and the limit. For example,
if the Preheat set temperature is
150 °C
,
and the peak temperature for the process
should not exceed
180 °C
, then you
PREHT PEAK HI TEMP LIMIT : +030
After edit Page to accept new value
Number Change, Adjust, Graph / Data
should enter
30 °C in the
PRHEAT PEAK HI
TEMP LIMIT
field.
Use the numeric keys on the front panel to enter a number and then press the
▲,
GRAPH or DATA
keys to save the value.
Pressing the
GRAPH
key when the
Schedule Setup, Page 1 of 5
, screen is
displayed will change the display to the
Schedule Setup, Page 2 of 5
. You can
also press the and keys to step
through the
Schedule Setup
screens.
This screen contains parameters for the
Main
thermocouple and the temperature
the Control is controlling. It also
includes some general profile parameters.
Press the
1
key to toggle
PREHEAT
ENVELOPE LIMITS
to between
ON
and
OFF
.
< SCHEDULE SETUP, Page 2 of 5 >
1. PREHEAT ENVELOPE LIMITS : OFF
2. REFLOW ENVELOPE LIMITS : OFF
3. RISE 1 TIME DELAY : 0.0 SEC
4. RISE 2 TIME DELAY : 0.0 SEC
5. PREHEAT HIGH TEMP LIMIT : +050 C
6. PREHEAT LOW TEMP LIMIT : -050 C
7. RELOW HIGH TEMP LIMIT : +050 C
8. REFLOW LOW TEMP LIMIT : -050 C
9. GRAPH TIME SPAN : 010 SEC
0. HEAD UP DELAY : 00.0 SEC
>. IDLE TEMPERATURE : 025 C
<. SCHEDULE REFERENCE :
Number Select, Page, Graph / Data
If set to
ON,
then the Control will monitor temperatures and trigger an
Out of Limits
and messages if the
temperature at any point is outside the user-set Preheat Envelope Limits.
If set to
OFF,
the Control will not monitor or display any temperature envelopes for Preheat.
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