General Maintenance 4
5977B Series MSD Troubleshooting and Maintenance Manual 97
To Separate the MSD from the 7890 GC
Materials needed
• Wrench, open-end, 1/4-inch × 5/16-inch (8710-0510)
Procedure
1 Vent the MSD.
2 Turn off the GC.
3 Remove the capillary column from the GC/MSD interface.
4 The foreline pump may be located on the floor, on the lab bench next to or
behind the MSD, or under the analyzer chamber at the back of the MSD.
Move it as needed to provide slack in the tubing and cables.
5 Move the MSD away from the GC until you have access to the GC/MSD
interface cable. (See Figure 5.)
Ensure the GC/MSD interface and GC oven have cooled before you remove the
column.
Figure 5 Separating and connecting the MSD and GC
The Agilent 7890 GC has a front
and a back location for the MSD
interface.
The Agilent 7820A GC has only one
location for the MSD interface.
Interface cable
LVDS cable
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