Emerson Rosemount 370XA System Reference Manual page 49

System Reference Manual
7P00370-H01
2.
3 - 22
The atmospheric vents should be connected to a vent line of at
⅜
least -inch diameter that is routed to the atmosphere in a
safe area to ensure there is no back-pressure created on the
vents..
(1) Sample
(2) Measure
(3) Atmospheric vent
(4) Bypass vent
The flows of the vents are:
• Sample Vent - 10 to 50 cc/min of sample gas for
approximately 3/12 minutes of the 4 minute cycle.
• Measure vent - Continuous flow of less than 10 cc/min of
carrier gas and 10cc of sample gas per analysis cycle.
• Sample Bypass - Continuous flow of 150 to 200 cc/min of
sample gas.
370XA Gas Chromatograph
APRIL 2014