Differences
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pld:start [2011/07/26 16:32] – janet | pld:start [2011/07/29 10:10] – jason | ||
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The Thermionics chamber is set up so that in event of a power failure, the valves between the roughing and turbo pumps will remain closed and the pumps will not turn back on when power is restored. | The Thermionics chamber is set up so that in event of a power failure, the valves between the roughing and turbo pumps will remain closed and the pumps will not turn back on when power is restored. | ||
- | If you discover that the power has gone out while the pressure is still fairly low (10< | + | If you discover that the power has gone out while the pressure is still fairly low (10< |
The Edwards roughing pump on the main chamber frequently fails to start. | The Edwards roughing pump on the main chamber frequently fails to start. |