Chamber Tests of LACE
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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