Hi The real questions are:
1) Over what period of time can you get a replacement under warranty. 2) How long on average is the tube likely to be useful. There are numbers for each. It just depends on which one you are after. Bob > On Sep 29, 2016, at 8:07 AM, Ruslan Nabioullin <[email protected]> wrote: > > Hi, I'm unable to fully grasp the lifetime specifications of typical COTS > cesium standard physics packages, for both old and new designs. For example, > the documentation of an older HP standard specifies a shelf life of two years > if the ion pump is operated two or three times per year, yet at the same time > the ``beam tube warranty'' period is three years. Does this mean that if the > physics package is fully operating (i.e., LOOP OPEN, OPER, or LTC), then it's > guaranteed to last at least three years, but if it's completely shut down, > except for vacuum maintenance sessions (using the mode CS OFF) two or three > times per year, it will last only two years? Also, what will the expected > lifetime of the package be if the standard is kept as a reserve, > specifically, continuously-powered with the mode set to CS OFF (so continuous > vacuum maintenance), and activated or deactivated to or from, resp., OPER, as > needed, excl. the time spent fully operating (i.e., in this case, the time > spent in th e OPER mode doesn't count)? > > Thanks in advance, > Ruslan > _______________________________________________ > time-nuts mailing list -- [email protected] > To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there. _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
