224 Advanced Operation Manual
6 Valves
If the GC has one valve configured as a multiposition valve
and another configured as a gas or liquid sampling valve, it
assumes that they are to be used in series. This “double
configuration” can be used to replace an automatic liquid
sampler and sample tray in an analytical sequence. The
multiposition valve becomes the sample tray; the sampling
valve becomes the injector.
Two configuration parameters provide mechanical and
electrical compatibility with most multiposition valve
actuators.
Switching time In seconds, is a delay between successive
actuator movements. It allows time for the actuator
mechanism to prepare for the next movement.
Invert BCD Complements the BCD input; 1’s become 0’s and
0’s become 1’s. This accommodates coding convention
differences among manufacturers.
Sample streams in
Selected stream out
Multiposition stream
selection valve
Sampling valve
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