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Leak
Checking
Leak checking methods used with the 1041 Universal Injector are presented
in order of overall sensitivity and performance. When leak checking the
injector only, be sure to use the appropriate procedure.
1
Remove the test column and plug the injector outlet with a 1/16
″
no-
hole ferrule (P/N 28-694503-00). Remove the injector nut, install a
new septum, then replace injector nut and turn nut clockwise until it
comes to a stop.
2
Pressurize the injector to 60 psig with carrier gas. Turn off the carrier
gas flow at the supply.
3
A pressure drop less than or equal to 1/2 psig in 15 minutes is
acceptable. Locate leaks with an appropriate leak detector.
Note: Any changes in temperature while performing this test may
result in false readings due to expansion/contraction of the gas with
temperature.
C A U T IO N
Commercial soap type leak detection fluids should not be used
at any point in a capillary system, since, if a leak is present, the
fluid will penetrate and contaminate the system. Column
performance will be degraded and a substantial period of time
may be required to achieve a clean system.
4
An alternate way to leak check the injector only is to have the column
installed in the injector end and the opposite column end sealed with
a flame or appropriate fitting.
