[time-nuts] OT, looking for a good science forum

Paul Amaranth Paul at Auroragrp.Com
Sat Jan 26 14:29:21 EST 2013


> Message: 4
> Date: Sat, 26 Jan 2013 16:28:19 +0100
> From: Fabio Eboli <FabioEb at quipo.it>
> To: Discussion of precise time and frequency measurement
> 	<time-nuts at febo.com>
> Subject: Re: [time-nuts] OT, looking for a good science forum
> Message-ID: <5ef3f142b075fcab38182666a4e5073b at quipo.it>
> Content-Type: text/plain; charset=UTF-8; format=flowed
> 
> Il 2013-01-26 14:58 Bob Camp ha scritto:
> > Hi
> >
> > Platinum RTD's are a pretty good bet for -80C, they hold up well down
> > there. For calibration, ammonia and acetylene both have triple points
> > in the vicinity. I'd probably try ammonia first, but not for any good
> 
> Doesn't acetylene have a bad habit of dissociate when pure liquid?
> 
> Fabio.
> 

Yes, it's normally stored disolved in acetone.  It also spontaneously dissociates 
if pressures exceed 15 psig or 30 psi absolute.  That could put a real damper on your day.


-- 
Paul Amaranth, GCIH  | Rochester MI, USA              
Aurora Group, Inc.   |   Security, Systems & Software 
paul at AuroraGrp.Com   |   Unix & Windows               



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