HELIX CTI-CRYOGENICS On-Board FastRegen Programming And Operation Instructions page 43

On-Board FastRegen Control Module Programming and Operation Instructions
From page 3-28
DLY RESTART 20.5 HRS.
COOLDOWN 235K/17K
REGEN COMPLETE
STOP REGEN?
END
Figure 3-25: On-Board Cryopump Full Regeneration Cycle Example (continued)
P/N 8040406
If a DELAY RESTART time has been programmed, the following
events occur:
- The On-Board FastRegen Control Module backfills the cryopump
with purge gas and waits the programmed DELAY RESTART time
- The cryopump is roughed out
- The ROR test is repeated
- The cryopump cools down
The cryopump turns ON after successful completion of the ROR test.
During cooldown mode, the display indicates real time temperature
(235K) and the base temperature (17K).
When the cryopump reaches 17K, the REGEN cycle is complete and
the temperature control activates you programmed first stage tempera-
ture control setpoint.
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C TI CRYOGENICS
HELIX TECHNOLOGY CORPORATION
3-29