Datasheet

Getting Started 6 Connecting Autosamplers
6 Connecting Autosamplers
This chapter describes wiring of the autosamplers. The configuration
varies depending on the type of chromatograph (GC or LC), sequence
mode (ACTIVE or PASSIVE) and presence of optional control modules for
direct control of chromatography equipment.
Note: More detailed information on Clarity sequence modes can be found in
the chapter "Sequence" in the Reference guide.
The typical configurations are:
l AS + GC set - ACTIVE sequence
l AS + LC set - ACTIVE sequence
l AS - PASSIVE sequence (GC or LC)
l AS - ACTIVE sequence + AS Control + A/D card
l AS - ACTIVE sequence + AS Control + digital acquisition
6.1 AS + GC set - Active Sequence
With a GC is combined with an Autosampler, the sample cycle is typically
governed by the GC. With the commonly used temperature gradient, the
necessary cool down of the system takes variable time. The sampler is
thus synchronized with the GC by a signal wire (READY), allowing the
next injection only after the GC gets to the READY state. The autosampler
performs the injection and starts the GC using another signal wire
(START). Any autosampler that is used in the Clarity Active Sequence
without an AS Control module must be synchronized by cable with the
Clarity station as well as with the chromatograph. The IN
n
starting cable
should be plugged into the synchronization output (INJECTION) of an
autosampler or GC. The OUT
n
R cable should be connected to the
synchronization input between GC and autosampler.
Note: Further information about the Active Sequence is available in the
Clarity User Guide.
All commonly used autosamplers may be divided in two groups:
l Autosamplers started by closing the contacts on the input (READY ).
l Autosamplers started by opening the contacts on the input (READY).
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