PRE-CONFIGURED GCs
Mud-logger
Theory of Operation
Thesamplegasstreamisconnectedtothebulkheadfittingonthefrontofthevalveoven.Insidethevalveoven,
thesampleflowissplitthrougha“T.”OnonesideoftheT, theflowisdirectedthrougharestrictor, throughthe
sampling loopon the10-portvalve,andon to thecolumnandFID#1for
separationanddetection.Theothersideof theTdirects thesamplegas
stream throughamuch longerrestrictor,andon toFID#2.
Thesamplegasstream
isconnectedhere.
7ft. restrictor
3in. restrictor
10-portgassamplingvalve
with30uLsample loop
“Tee”
Sample In SampleOut
FID#2
FID#1
Heatedvalveoven
The10-portgassamplingvalve isplumbed tobackflush thecolumn to thedetector.At anautomatically
repeating time intervalcontrolled through thebuilt-inPeakSimpledatasystem, thegassamplingvalve injects
thecontentsof its30µLsample loop into theHayesep-Dcolumn.There, it isseparated into theconstituent
hydrocarbonpeaks,whicharedetectedbyFID#1. In theLOADposition, thecarrier gas flows into the
columnwhilesamplegasflows through thesample loopandout tovent. In theINJECTposition, thecarrier
gasflowsfirst through thesample loop, thensweeps thesample into theHayesep-Dcolumn.
