Agilent Technologies 5975T LTM GC Operation Manual page 107

7 Once communication with the PC has been established, click OK.
Figure 29
Within 10 to 15 minutes the turbo pump speed should be up to 80%
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pump speed should eventually reach 95%. If these conditions are not met, the MSD
electronics will shut off the foreline pump. In order to recover from this condition, you
must power cycle the MSD. If the MSD does not pump down correctly, see the manual
or online help for information on troubleshooting air leaks and other vacuum problems.
8 When prompted, turn on the GC/MSD interface heater, guard column
Do not turn on any GC heated zones until carrier gas flow is on. Heating a column with
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no carrier gas flow will damage the column.
9 After the message Okay to run appears, wait 2 hours for the MSD to reach
5975T LTM GC/MSD Operation Manual
Pumping down
enclosure, and LTM column. Click OK when you have done so.
The software will turn on the ion source and mass filter (quad) heaters. The
temperature setpoints are stored in the current autotune (*.u) file.
thermal equilibrium. Data acquired before the MSD has reached thermal
equilibrium may not be reproducible.
Operating in Electron Impact (EI) Mode
3
(Figure 29). The
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