Powering Up the MS
1. Turn on the power switch of the MS.
2. Turn on the CPU and monitor.
3. Open
MS Workstation.
4. Allow the foreline pump and the turbo pump to run for about 30 minutes
before assuming software control. This allows the pumps to become properly
lubricated.
If the foreline pump runs loudly for more that 1 min, turn off the main
circuit breaker and check the system for leaks. Possible leak sites
include the vacuum hose connections to the turbo or foreline pumps,
the manifold or transfer line O-rings and the column connection to the
transfer line.
5. Open
System Control
from the MS Workstation toolbar to activate
communication between the PC and all modules connected to it.
6. Check that the status screen displays both MS and GC.
7. The turbo pump speed should reach 100% between 1 to 2 minutes. The
turbo current should be less than 350 mA when the turbo reaches 100%.
8. Check for high mass noise using the daily check method.
•
If OK, then check air/water. There should be a big 18 peak and no 28
peak. Turn off trap.
•
If OK, bakeout MS overnight.
Baking Out the GC/MS
1. Ensure that the Trap and Source temperatures are at least 150 °C and the
Manifold temperature is at least 50 °C before heating the transfer line, GC
column oven, and injector. This prevents column stationary phase from
collecting on low temperature MS components.
2. Set the injector temperature to 230 °C with a split ratio of 50:1.
3. Set the column temperature to 150 °C.
4. Click
Temperatures
on the
Analysis
tab and enter these temperatures:
•
Trap: 150 °C
•
Manifold: 40 °C
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