Routine and Preventive Maintenance
_______________________________________________________________ The Source Block Assembly
Cleaning the Cone Wash Nozzle
The cone wash nozzle (P/N FM102521) should require cleaning only if it
becomes blocked. When the pump supplying the cone wash with solvent is
switched on, check the backpressure; if it rises, this could indicate a
blockage in the nozzle.
1.
2.
3.
Remove the entrance cone. See Cleaning the Entrance Cone on page 5-
11.
Remove the cone wash nozzle and sonicate, first in a 10% v/v solution
of formic acid and then in methanol.
Replace the nozzle and entrance cone.
Cleaning the Source Block Assembly
It is good practice to clean the entire source block assembly on a weekly
basis, particularly if complex sample matrices or chromatographic buffers
are routinely used.
Carry out the procedure for removing the source block assembly and then
the procedure for disassembling and cleaning the source block if the source
has become completely blocked.
From the animations main menu, choose RF Lens Disassembly, Cleaning,
and Assembly. Follow the procedure for RF Lens Removal and then RF
Lens Disassembly, or follow the Full RF Lens Cleaning Procedure.
Removing the Source Block Assembly
The starting point for this procedure is the source setup for ESI or APCI
operation, with the LC and gas flows off, and the probe cooled.
WARNING.
Allow the source block and probe heater assembly to cool
before carrying out any maintenance.
1.
2.
3.
Vent the instrument if it is currently under vacuum. Right-click on the
server and choose
Vent
.
Unscrew and remove the PEEK finger-tight fitting from the ESI probe
assembly (P/N FM102595) or APCI probe assembly (P/N FM102587).
Turn the locking plate clockwise to the open position and remove the
ESI probe assembly (P/N FM102595) or APCI probe assembly (P/N
FM102587).
____________________________MSQ Hardware Manual ___________________________
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