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1041 Injector
Hardware
Replacement
and Cleaning
Procedures
Routine cleaning and maintenance of the 1041 Universal Injector system
includes septum replacement and column conditioning. Pressure testing
and leak checking procedures are included to assure proper functioning of
the system.
Septum
Replacement
Septum replacement represents the major part of routine chromatographic
maintenance. Septum damage from the needle penetrations can be avoided
by injecting into the same hole and not using syringes with needles having
burrs or bends at the tip which cut the septum.
The injector nut and automatic start switch assembly may be
very hot during instrument operation and should not be
touched with unprotected hands. Allow sufficient time for the
injector nut and surrounding assemblies to cool before
continuing with this procedure.
C A U T IO N
Handling a septum with bare fingers may result in column
contamination. Use tweezers, finger cots, or gloves when installing
a new septum.
1
Be sure the injector nut is cool. Unscrew the injector nut and place
on a clean, uncontaminated surface.
2
Using tweezers, remove the septum, taking care not to scratch the
internal surfaces of the injector.
3
Using tweezers, place a new high temperature septum in the
injector. If the septum is TFE or FEP coated put that side down.
4
Replace the injector nut and tighten until resistance is felt, then
tighten an extra 1/2 to full turn.
