The HAM6 ISI has been under purge for several weeks now and we've seen a continuous drop in dew point. These latest data are a continuation from previous logs. 

You can see on the 24th the numbers spike. This was caused by me allowing (unintentionally) the Nitrogen dewar to run out over the weekend. Luckily after refilling and restarting the test on the 25th you can see the dew point dropped quickly enough. Most likely this was air intermixing at the probe and less mixing inside the shipping container. I've decided to continue to run the purge at 10 liters/min until the numbers stagnate for a long period of time.