Agilent 7890
4 Using the control module
4.6 Using Dual Injector
In case your GC is equipped with two injectors, it is possible to use them
simultaneously. For this purpose it is necessary to have two unused
Instrument available.
l
At first, ensure the GC has two injectors and tray correctly detected. See
also
7890 Setup - Sampler
.
l
Configure the GC, Sampler and Detector 1 on the first Instrument. See
also
Clarity
Configuration
.
l
Configure the Detector 2 on the second Instrument.
l
First instrument serves as a master, all GC and AS method parameters will
be set here. In the method setup,
AS
tab, select the option
Use Both
Injector
and fill in the
Vial No. Shift
.
l
On the second instrument, the AS and GC tabs are not available in
method setup. Only the
Acquisition
tab is available to set the configured
detector
Range
and
Sample rate
.
The sequence on first Instrument defines the vial numbers for first injector
and injection volume for both. The injection vial and injection volume in
the second instrument sequence are just informative, injection volume is
equal to that on first instrument, the vial number is equal to the vial
number in first instrument and the specified vial shift. To run the system,
prepare methods and sequences for both instruments, start the sequence
on second instrument and then the sequence on first instrument.
Sequence on the master Instrument (controlling the GC) needs to have
Active Sequence
checkbox checked, the sequence on the second
Instrument needs to have it unchecked (passive sequence). Checkbox is
available on the
Sequence Options
dialog.
- 26 -
