Chamber Tests of LACE

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Figure 7. The GC and pump sections of LACE were placed in the NOAA/CMDL vacuum chamber for pressure and temperature tests during May 1996. We were able to get stable chromatograms of CFC-11 and CFC-113 from both channels to pressures as low as 8 mb and temperatures as low as -30 ^oC. One problem observed was the sticking of an absolute back-pressure valve on the GC section because of the cold temperatures. The solution was to warm the valve with a small heater and insulation.

Figure 8. Jim Elkins, Co-P.I., overseeing a chamber test.

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