Standalone Control
Using two injectors
106
Using two injectors
Using standalone control, you can operate two injectors and a tray. The
standalone configuration of a tray with two injectors has the following
characteristics:
• Input and output signals are shared.
• The system sends only one INJECTOR READY signal to the GC when both
injectors are ready and one START signal at the beginning of the injection
stroke.
• The system sends two binary-coded decimal (BCD) signals, one for each
data channel.
• The injectors operate in the synchronous mode: they inject at the same
time.
Synchronous mode
In the synchronous mode, the tray arm delivers the first vial to the front
injector. During the first injection, the rear injector is idle. For the second
injection, the tray arm delivers the first vial to the rear injector and the second
vial to the front injector.
Once both injectors have samples, they inject the samples at the same time.
Figure 61 illustrates the sequence of injections. This mode is recommended for
dual-column applications.
Figure 61. Synchronous N-1 injection
Vial 1
Vial 2
Vial 3
.
Vial n
Idle
Idle
Vial 1
Vial 2
.
Vial n-1
Vial n
1st
2nd
3rd
.
nth
Last
Injection Number Rear InjectorFront Injector
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