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Programming and Operation
3-30
P/N 8040406
C
HELIX TECHNOLOGY CORPORATION
-
TI
CRYOGENICS
Figure 3-26: On-Board Cryopump Fast Regeneration Cycle Example
START
Press REGEN
Press 1 To Start
REGEN OFF
CONFIRM START
PRESS 3
Press 3 To
Confirm Start
The On-Board FastRegen Control Module is ready to start a Fast
regeneration 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
The cryopump shuts OFF , the purge valve opens, and purging starts.
Shows current second stage temperature (125K). Cryopump turns
back ON after purge gas check. Heaters are turned ON and the
arrays are warmed up. Purge shuts OFF and pump sits for a short
period of time (approximately 1 minute) to allow second stage gases to
boil OFF.
Continued on page 3-31
Confirms the start of the Fast regeneration cycle.
NOTE: In the case of FastRegen Control Modules for Ion
Implanters, several rough and purge cycles occur during the
warmup phase. These cycles help remove hydrogen gas which
may be present in the cryopump.