Line 21 was replaced by line 21 |
- * Increase the temperature of the heat exchanger to 100 K. |
+ * Increase the temperature of the heat exchanger to 100 K. (The better part of air will not condense at this temperature) |
Line 25 was replaced by lines 25-27 |
- * Pump down and flush again with He gas, then pump down to a pressure between 10 and 50 mbar. |
+ * Pump down and flush again with He gas. To remove all contaminants you should repeat this procedure an infinite number of times (at least 2x). |
+ * If you cannot reach 0 mbar on the mechanical gauges you might be faced with a leak into the sample chamber or with an offset on the gauge. |
+ * Pump down to a pressure between 10 and 50 mbar. |