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

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Mobile: (512) 810-8437