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Jason, you nailed it, thanks! 

Someone had set it down to 25% 

I set it to 100%, the temp is steadily climbing. Much longer voltage duty cycle. 

Many thanks!

Chris
________________________________________________
Chris Maupin
http://geography.tamu.edu/profile/CMaupin
Research Associate and Facilities Manager
Stable Isotope Geosciences Facility (SIGF)
Geography Department
Texas A&M University
405 Eller O&M Building 3147 TAMU
College Station, TX 77843 USA
Email: [log in to unmask], [log in to unmask]
Mobile: (512) 810-8437




On Sep 30, 2013, at 3:33 PM, Jason Curtis <[log in to unmask]> wrote:

> Hi Chris,
> 
> Check the setting for Y1.  This controls the maximum output.  Jumo factory setting is 100% - maybe it got changed to a lower setting along the way.  You can find the manual at:
> 
> http://www.jumoplus.com/pdf_manuals/70/b70.2040.pdf
> 
> (One warning is that Thermo or someone might have set Y1 lower so that it would maintain set point better without overshooting).
> 
> Jason
> 
> 
> 
> On Sep 30, 2013, at 3:43 PM, Christopher Maupin wrote:
> 
>> Hi all, 
>> 
>> I'm having an issue with my Gasbench GC oven. Since I began working with this Gasbench, the oven temp will not rise above 74C. I have tried using both a different relay and a different heating element with no success. 
>> 
>> Other Gasbenches I have used will of course easily go much higher. 
>> 
>> I recorded the rate of temp rise, and from 40-60 degrees, it will rise at about a degree per minute. After that, the temp vs. time slowly plateaus and painfully crawls up to 74ish and stays put firmly. 
>> 
>> My place of real ignorance here is with the Jumo Itron 16 temp controller. Is it possible that it was programmed to prevent a high temp setting? Both the elements I tried give a resistance of ~224 ohms and both relays appear to work...
>> 
>> Any thoughts you all can offer would be much appreciated. 
>> 
>> Chris
>> ________________________________________________
>> Chris Maupin
>> http://geography.tamu.edu/profile/CMaupin
>> Research Associate and Facilities Manager
>> Stable Isotope Geosciences Facility (SIGF)
>> Geography Department
>> Texas A&M University
>> 405 Eller O&M Building 3147 TAMU
>> College Station, TX 77843 USA
>> Email: [log in to unmask], [log in to unmask]
>> Mobile: (512) 810-8437
>> 
>> 
>> 
>> 
> 
> 
> Jason Curtis, Ph.D.
> Stable Isotope Mass Spec Lab manager
> Senior Associate-In Geochemistry
> Department of Geological Sciences
> 241 Williamson Hall
> University of Florida
> Gainesville, FL 32611
> [log in to unmask], office 352-392-2296
> lab 352-392-3344, fax 352-392-9294
> 
> 
> 
>