CHAPTER 3: USING PROGRAMMING FUNCTIONS
UNIFLOW
®
4 PULSED HEAT CONTROL
990-908 3-13
Pressing the GRAPH key when the
Schedule Setup, Page 4 of 5, screen is
displayed will change the display to the
Schedule Setup, Page 5 of 5. This screen
contains parameters for the Auxiliary
thermocouple’s envelope settings.
Press the 1 key to toggle PREHEAT
ENVELOPE LIMITS
to between ON and
OFF.
If set to ON, then the Control will monitor
temperatures and trigger an Out of Limits
and messages if the temperature at any
< SCHEDULE SETUP, Page 5 of 5 >
AUXILIARY THERMOCOUPLE
1. PREHEAT ENVELOPE LIMITS : OFF
2. REFLOW ENVELOPE LIMITS : OFF
3. PREHEAT HIGH TEMP LIMIT : +050 C
4. PREHEAT HIGH TEMP LIMIT : -050 C
5. REFLOW HIGH TEMP LIMIT : +050 C
6. REFLOW LOW TEMP LIMIT : -050 C
7. AUX START TEMPERATURE : 025 C
8. AUX PREHEAT TEMPERATURE : 025 C
9. AUX REFLOW TEMPERATURE : 025 SEC
Number Select, Page, Graph / Data
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.
Press the 2 key to toggle REFLOW ENVELOPE LIMITS to between ON and OFF. If set to ON, then the
Control will monitor temperatures and trigger an Out of Limits if the temperature at any point is outside
the user-set Reflow Envelope Limits. If set to OFF, the Control will not monitor or display any
temperature envelopes for Reflow.
Press the 3 though 6 keys to set the Envelope Limits. These parameters allow you to set the upper
and lower envelope limits for the auxiliary thermocouple temperature. The numbers entered will be
the difference between the expected temperature of the Auxiliary thermocouple and the envelope
limit.
For example, if you want an envelope that is 50 °C greater than the expected Auxiliary thermocouple
temperature,
then you should enter 50 °C in the REFLOW HIGH TEMP LIMIT field.
You set the expected Auxiliary thermocouple temperature by entering the parameters for the AUX START
TEMPERATURE, AUX PREHEAT TEMPERATURE
and AUX REFLOW TEMPERATURE. Press the 7
though 9 keys to set these parameters. The AUX START TEMPERATURE is the expected Auxiliary
thermocouple temperature at the start of Rise1. If the Rise1 time has been set to 0 seconds, then any
entry for
AUX START TEMPERATURE will be ignored by the Control.
The AUX PREHEAT TEMPERATURE is the expected Auxiliary thermocouple temperature during
Preheat. The
AUX REFLOW TEMPERATURE is the expected Auxiliary thermocouple temperature
during Reflow.
NOTE: The expected Auxiliary thermocouple temperature and its envelope will only be displayed if
DISPLAY AUX TEMP LINE is set to ON on the REFLOW TEMPERATURE SETUP Screen.
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