Disassembly and testing reveals that one of the three (a non-metallic
composite?) heating cartridges has failed and will not heat. The
Gasbench manual shows a single related part number 111 2800
"thermostated sample tray" which I assume is for the entire assembly
including the aluminum block.
Please will someone provide the Thermo part number for these cartridge
heaters, and for the Watlow replacements as well if they are known.
On 11/19/2015 7:08 AM, Josiah Strauss wrote:
> Three things to check would be the Jumo controller, cartridge
> heaters, and the solid state relay attached to the Jumo. From what
> you mentioned it sounds like the heaters are failing. If Thermo can't
> supply them quickly, you can use Watlow heaters in their place.
> __ Josiah Strauss, PhD Dolan Integration Group (DIG) Please note our
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> -----Original Message----- From: Stable Isotope Geochemistry
> [mailto:[log in to unmask]] On Behalf Of Marilyn Fogel Sent:
> Wednesday, November 18, 2015 8:05 PM To: [log in to unmask]
> Subject: Re: [ISOGEOCHEM] gasbench heatung block now with anemic
> We just had to replace our Jumo controller on the Gas Bench after
> moving the system across town. I would check that as well.
> Dr. Marilyn L. Fogel, Professor of Ecology Chair, Life and
> Environmental Sciences Unit School of Natural Sciences University of
> California at Merced 5200 Lake Rd., Merced California 95343 Phone:
> On 11/18/15, 12:19 PM, "Stable Isotope Geochemistry on behalf of Dr
> S.F.M. Breitenbach" <[log in to unmask] on behalf of
> [log in to unmask]> wrote:
>> HI, try replacing the heaters as they might have got a bit old...
>> this should help. best greetings, Seb
>> On 18.11.2015 20:16, Jim Palandri wrote:
>>> Good afternoon!
>>> Thank you all for your suggestions regarding the Gasbench GC
>>> column bakeout temperature.
>>> Somewhat related, our approx. eight year old Gasbench heating
>>> block, while still able to attain and hold 70C, now cools quite
>>> quickly with the insulating cover off, and takes a very very long
>>> time to return to 70C, and the K2 lamp in the Jumo Itron stays on
>>> almost continuously.
>>> Is the solution here to simply replace the cartridge heaters, or
>>> will I need to delve more deeply to fix this?
>>> Thank you! -Jim
Department of Geological Sciences
1272 University of Oregon
Eugene, OR 97403-1272