Agilent Technologies 8890 - Create a Method

74 Agilent Gas Sample Selector for 8860 and 8890 User Manual
5 Maintenance and Troubleshooting
Sweep mode
Sweep mode
This mode performs a deep purge of the entire pipeline. Before starting this mode,
remove all sample gas bags or sample cylinders. The purge gas flows through the
entire system, and sequentially out through each sample input port.
Figure 23 Sweep mode (maintenance) for bag version.
1
5
3
7
Sample Loop
Carrier Gas
To C ol um n
On/Off Valve
GC Valve 1
Needle Valve 2
MPV
Multi-Position Valve
Purge Valve
• GC Valve 1 – OFF
•
Sample Valve – ON
• Purge Valve – ON
• Pump – OFF
Purge N
2
Needle Valve 1
Pump
Assembly
Selector
Vent
Selector GC
GC
Selector
Sample Gas
Purge Gas
Carrier Gas
1
2
3
4
5
6
OUT
Sample In
n/
O
f
f
V
a
V
V
l
v