
On-Board FastRegen Control Module Programming and Operation Instructions
P/N 8040406
3-39
C
HELIX TECHNOLOGY CORPORATION
-
TI
CRYOGENICS
Zero Cryo Thermocouple
The tenth parameter of the SERVICE function, as shown in Figure 3-37,
resets the cryo thermocouple gauge to zero. The cryo thermocouple gauge
reading is displayed until the gauge is set to zero.
NOTE: The cryo thermocouple gauge must be turned ON and under a
vacuum of less than 10
-4
torr (less than 1 micron) before this parameter can
be used. Any attempt to zero the gauge at a pressure above 30 microns, or
when the gauge is turned OFF, results in a calibration failure.
Figure 3-37: Zero Cryo Thermocouple Gauge Display
First Stage Temperature Control
The eleventh and final parameter of the SERVICE function allows the first
stage temperature control of the cryopump to be turned ON or OFF. The
first stage temperature setting is displayed as shown in Figure 3-38.
Figure 3-38: First Stage Temperature Control Display
Last
Next
Clear
MONITOR
REGEN
SERVICE
CONTROL
RELAYS
HELP
oo
ON
-BOARD
®
Enter
1
2
3
4
5
6
7
8
9
-
0
.
ZERO CRYO TC
Last
Next
Clear
MONITOR
REGEN
SERVICE
CONTROL
RELAYS
HELP
oo
ON
-BOARD
®
Enter
1
2
3
4
5
6
7
8
9
-
0
.
1ST TMP CTL ON