Gerry,

Thanks so much for the information.  After looking a little longer, I found some installation documentation that says the reference 1 capillary should be 0.025mm by 100 cm, but with the same vent specs as you have listed there.  The funny thing is that I'm having a heck of a time locating 0.025mm ID DAFS capillary, so I will give your 0.075 ID x 2000mm a try.

Best,
Mike


-----Original Message-----
From: Stable Isotope Geochemistry [mailto:[log in to unmask]] On Behalf Of Gerard Olack
Sent: Saturday, February 14, 2009 11:23 AM
To: [log in to unmask]
Subject: Re: [ISOGEOCHEM] Type and Length of FS Capillary for CO2 Ref Gas in Conflo

Hi Mike--

A few more things (manual too big for my e-mail)...

The new catalog also gives some alternatives, e.g. 0.075 ID, 2000mm.
The vent is 0.10 mm ID, 200mm.   Note, the smaller ID tubing can come
with thick wall variants that  may not work so well in the open split.
Also, no mention of "deactivated" or "undeactivated" fused silica.  I've
only seen the GCC operating manual specify, and that was for deactivated
fused silica--which has the same part # as the fused silica in other
manuals (N.B. It's not specified in the GCC's service manual, where you
find the part numbers).  Check your favorite chromatography company for
their guard columns (methyl or dimethyl deactivated), or SIS.

good luck...

gerry


Gerard Olack wrote:
> HI Mike--
>
> It's in the really thin service manual. Ref 1 is listed as 0.05 ID,
> 310 mm; Ref 2 is 0.05 ID, 340 mm. They both have a short bleed
> lines--and don't forget the two-hole ferrules.
>
> take care
>
> gerry
>
> p.s. You can download a .pdf of a new operating manual that has the
> service information integrated into it from their "CIS" site. Log in
> required to get log into their CIS site "thermo">"mass spectrometry"
> under the 'in the lab' column on the right>"advanced mass
> spectrometry" under the 'products' column bottom left> "CIS" under
> middle of the page:
> http://www.thermo.com/com/cda/landingpage/0,10255,382,00.html
>
> Kubo, Michael D. (ARC-SSX)[SETI INSTITUTE] wrote:
>>
>> Hello fellow isogeochemers,
>>
>> I have recently developed a strange problem with my reference gas
>> injection on my Conflo interface and I have determined (I hope) that
>> I need to replace the fused silica capillary that runs from the CO2
>> gauge on the front of the Conflo to the glass capillary/sniffer
>> assembly. Does anyone have the type (i.e., diameter) and length of
>> what this capillary should be? I can't seem to find it in my
>> documentation.
>>
>> Thanks in advance!
>>
>> Best,
>>
>> Mike
>>
>> ****************************************************************************************************************************************
>>
>>
>> Michael D. Kubo
>>
>> NASA Ames Research Center
>>
>> M/S 239-4
>>
>> Bldg. N239, Room 327
>>
>> Moffett Field, CA 94035
>>
>> (650) 604-6110
>>
>