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On-Board FastRegen Control Module Programming and Operation Instructions
P/N 8040406
3-27
C
HELIX TECHNOLOGY CORPORATION
-
TI
CRYOGENICS
REGEN Cycle Examples
The flowcharts in Figures 3-25 and 3-26 provide you with examples of the
typical REGEN cycle for On-Board Cryopumps.
NOTE: The values in these examples are for discussion purposes only.
Figure 3-25: On-Board Cryopump Full Regeneration Cycle Example
START
Press REGEN
Press 1 To Start
REGEN OFF
CONFIRM START
PRESS 2
Press 2 To
Confirm Start
The On-Board FastRegen Control Module is ready to start
a REGEN cycle.
Regeneration is ready to start.
DLY START 15.5 HRS.
A DELAY START has been programmed. The On-Board
FastRegen Control Module will wait 15.5 hours before the
REGEN cycle begins.
WARM-UP 125K/310K
EXTD PURGE 5M
The cryopump shuts OFF, the purge valve opens, and purging
begins. The display shows second stage temperature (125K)
and the target temperature (310K). Heaters are turned ON
and the arrays are warmed up to 310K.
When the second stage reaches 310K, the purge gas stays ON
for (5M) additional minutes (which is the extended purge).
EXTENDED PURGE time purges water or other contaminants
from the cryopump during a REGEN cycle. At the end of the
extended purge, the purge valve is closed and the rough valve is
opened automatically.
Continued on page 3-28
Confirms the start of full regeneration.