Manual Version e1-4.3.0.ae-R3.
Page
100
Figure 47. Gas box heater connector near the base of the expansion chamber.
6.13 Vacuum Interlocks
The e1 Series has two vacuum interlocks, one to make certain that the chamber is below approximately
375 Torr of pressure before permitting the source bottle valve (Valve 1) on the gas panel to open. The
other interlock prevents all valves on the gas panel from opening if the pressure at the main vacuum
line is above approximately 375 Torr.
6.13.1 Chamber interlock
The purpose of the chamber interlock is to make certain that there is not an accidental release of xenon
difluoride from the source bottles via the chamber. The operation of the interlock is performed by first
detecting if the vacuum pressure is below approximately 375 Torr using the chamber vacuum switch
shown in Figure 48. If the pressure in the chamber is above 375 torr, valve 1 will not have power to
open. It should be noted that this sensor is tested every time that the chamber is vented. If there is a
sensor failure, a warning message will be displayed (note that it is necessary for the Show Warnings
setting to be enabled in the System Configuration Menu any warning messages to be displayed). This
test is performed by the computer verifying that the chamber vacuum switch trips during venting,
6.13.2 Vacuum interlock
The purpose of the vacuum interlock is to prevent any valve from opening if the vacuum to the system
is insufficient. The logic is that if there is not sufficient vacuum to the system, it is not safe to allow the
opening of valves. The primary causes of this interlocked situation would be a pump failure or a break
in the connection between the system and the pump. The operation of the interlock is performed by first
detecting if the vacuum pressure is above or below approximately 375 Torr using the main vacuum
switch shown in Figure 48. If the pressure is below 375 torr, all valves, except possibly valve 1 (see
above) are
permitted
to operate. Otherwise, even if the computer sends a signal via the DeviceNet
interface to open any of the valves, they will not have the power to open. If there is a main vacuum
failure, a warning message will be displayed (note that it is necessary for the Show Warnings setting to
be enabled in the System Configuration Menu any warning messages to be displayed).
Содержание SPTS Xactix e1 Series
Страница 1: ...Manual Version e1 4 3 0 ae R3 2015 04 Xactix e1 Series System Manual ...
Страница 38: ...Manual Version e1 4 3 0 ae R3 Page 36 Figure 23 Shroud ventillation connection Shroud ventilation connection ...
Страница 40: ...Manual Version e1 4 3 0 ae R3 Page 38 Figure 26 Showerhead stop installed ...
Страница 48: ...Manual Version e1 4 3 0 ae R3 Page 46 Figure 29 Chamber ventilation shroud moved to back ...
Страница 49: ...Manual Version e1 4 3 0 ae R3 Page 47 Figure 30 Chamber ventilation shroud pulled forward ...
Страница 83: ...Manual Version e1 4 3 0 ae R3 Page 81 ...
Страница 86: ...Manual Version e1 4 3 0 ae R3 Page 84 ...
Страница 101: ...Manual Version e1 4 3 0 ae R3 Page 99 Figure 46 Gax box heater ...
Страница 103: ...Manual Version e1 4 3 0 ae R3 Page 101 Figure 48 Vacuum interlock switches Chamber vacuum switch Main vacuum switch ...
Страница 109: ...Manual Version e1 4 3 0 ae R3 Page 107 9 Set number of purge cycles to 0 and Hard Pump Time to 10 minutes ...