[time-nuts] NIST Traceability [WAS: WWVB BPSK...]
michael batchelor
batchelormr at yahoo.com
Sat Mar 24 13:25:14 UTC 2012
Charles wrote:
>And even with a WWVB reference, one needs an "internal
>measurement assurance program" to support a claim of traceability for
>the measurements that one makes.
Correct. You must not only maintain a laboratory condition for your lab,
but you must keep - and validate - your phase data. Just having the lock
light "ON" at the time of measurement is insufficient. I've run a metrology
lab in the past, so the methods and procedures for both the electronic
and mechanical standards aren't lost on me..
But having the oscillator broken is a dead-nuts failure.That's not lost on
me either.
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