Agilent Technologies 6890 Series - Page 468

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Jun 2001
Site Preparation
Agilent 6890 Gas Chromatograph Service Manual
Gases 520
Gas requirements
* When using hydrogen with a thermal conductivity detector, vent the detector exhaust to a fume hood
or a dedicated exhaust to avoid buildup of hydrogen gas.
**Helium is not recommended as a makeup gas at flow rate> 5 mL/min Flow rates above 5 mL/min
shorten detector life.