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Changing API Probe Assemblies
______________________________________________ Removing the ESI Probe Assembly
__________________ LCQ Deca XP Plus Hardware Manual __________________
2-7
2.3 Removing the ESI Probe Assembly
To remove the ESI probe assembly, proceed as follows. Refer to Figure 2-2
on page 2-6 for the location of the components of the ESI probe assembly.
1. Stop the flow of sample solution (from the LC or syringe pump) into the
ESI probe.
2. Place the electronics service switch in the Service position. When you
place the electronics service switch in the Service position, the voltages to
the API source (including the ESI probe), ion optics, mass analyzer, and
ion detection system are turned off. The flows of sheath gas and auxiliary
gas are stopped.
3. Disconnect the high voltage cable from the connector on the ESI probe.
To disconnect the cable, turn the locking ring on the cable
counterclockwise until you can pull the cable free.
4. Disconnect the sample transfer line from the grounded transfer line fitting
on the ESI flange. See Figure 2-2. (The sample transfer line is the line that
comes from the LC, divert/injector valve, or syringe pump. It is not the
fused silica capillary that enters the ESI probe.)
5. Disconnect the sheath gas line and fitting from the inlet labeled Sheath
Gas on the ESI probe by turning the sheath gas line fitting (blue)
counterclockwise until you can pull the sheath gas line and fitting free
from the probe.
6. Disconnect the auxiliary gas line fitting from the inlet labeled Aux Gas on
the ESI by turning the auxiliary gas line fitting (green) counterclockwise
until you can pull the auxiliary gas line and fitting free.
7. Loosen the two flange retainer bolts that secure the ESI probe assembly to
the spray shield.
8. Pull back the ESI probe assembly from the spray shield.
9. With one hand holding the ESI flange, loosen the knurled fastener that
secures the ESI flange to the probe guide adapter.
10. Slide the ESI probe assembly towards the spray shield and off the probe
guide adapter. Store the ESI probe assembly in its storage container.
CAUTION. Make sure that the XP Plus electronics service switch is in the
Service position before you proceed.
Summary of Contents for LCQ Deca XP Plus
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