Agilent Technologies 5977B Series Operating Manual page 129

Gas A
(methane)
supply
Gas B
(other)
supply
Figure 42 Reagent gas flow control module schematic
Table 13 Flow control module state diagram
 
Result Gas A flow
Gas A Open
Gas B Closed

MFC On setpoint
Shutoff valve Open
The Open and Closed states are shown in the monitors as Open and Closed
respectively.
5977B Series MSD Operating Manual
Gas A
select valve
Gas B
select valve
 Purge 
Gas B flow with Gas A
Closed Open
Open Closed

On setpoint On
Open Open
MFC
Calibration
valve
Restrictor
Calibration
vial
Purge 
with Gas B
Closed
Open
 
100% On 100%
Open
Operating in CI Mode
Shutoff
valve
GC/MSD
interface
GC column
Standby, vented, or 
Pump out
flow module EI mode
Closed Closed
Closed Closed
 
On 100% Off 0%
Open Closed
5
CI
source
129