On Sun, 27 Mar 2016 10:13:32 -0400
Bob Camp <[email protected]> wrote:
> The “typical life” numbers on the tubes in the various Cesium standards
> are fairly accurate. Most units that are well cared for “die” when the tube
> goes out and come back to life when it’s replaced. The tube life dominates
> the MTBF in this case.
Lifetime is only one variable I am interested in. I suspect that most
of the standards have a much longer lifetime than their MTBF between
intermittent faults. E.g. Chirstopher Ekstrom reported at FSM8 that their
newly build Rb fountains show a frequency jump once in a while. After a
restart of the fountain it's back to normal.
Attila Kinali
--
Reading can seriously damage your ignorance.
-- unknown
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