[time-nuts] 10811 crystal orientation

iovane at inwind.it iovane at inwind.it
Wed Jul 8 18:01:07 UTC 2009


Hi Chad,
 
the sketch you sent seems to indirectly answer my question, as I could rely on the axis of minimum "g" sensitivity to orient my three 10811 assemblies, but for my purpose it seems that there is still a margin of ambiguity. I don't take from the sketch how the crystal is actually fitted (vertically?) into the case. As far as I know, "g" sensitivity depends mainly on how the crystal "weights" on its suspensions (contacts), and this is secondary for me.
So, I would be pleased to know how the crystal is actually oriented, say regardless of the "g" sensitivity.

Thanks.
Antonio I8IOV

> Hi Antonio,
> 
> Please see the attached diagram from the 10811A service manual.  Minimum and
> maximum G-sensitivity axes are shown.  Since the other variants of 10811 are
> all internally constructed the same, I would not expect a difference for the
> -60111.
> 
> - Chad.
> 
> 
> 
> On Wed, Jul 8, 2009 at 10:27 AM, iovane at inwind.it <iovane at inwind.it> wrote:
> 
> > Dear all,
> >
> > does anybody out there know the orientation of the crystal faces relative
> > to the outer case in a 10811-60111?
> >
> > (The sense of the question is that we are considering building a 3-axis
> > apparatus for gravity-related tests. Note, based on our tentative
> > modelization, crystals are not requested to work as accelerometers).
> >
> > Antonio I8IOV






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