[time-nuts] HP5061 Cesium ion pump question

[paul swed]

During my HP 5061Cesium testing last week I was watching the ion pump
current and am curious.
What is the typical behavior people see on the tube after say 3 months of
being turned off.
With 3 units I see one that pumps doen from 8 to 2 in 40 minutes. Another
maybe at 25 and takes 28 hours to get to 18. Just seems to be all over the
place.
Regards
Paul
WB8TSL