Agilent 7890 rear inlet run from sequence

[ogron]

For single injection there is a selection between front and rear inlet. However, for a sequence it appears as the intrument defaults to the front inlet when two columns are installed.
What am I missing? How do I make an injection to the rear inlet using the sequence?

FYI, I am using the Agilent MSD Chemstation E02.00

thanks,

[R13]

I hope You did set up instrument configuration in Chemstation - i.e. which column connected to which injector and detector (even if You have two identical columns, each must be "installed" in software separately).

In the sequence you have measurement method and that method has in the (flow set up tab) parameters selected which column is used for the measurement - you can see in the column description also details of injector/detector mentioned. It is my understanding that this is the place where the active injector is set.

I did not have two columns installed at once. We mainly used rear injector (split/splitless) and when I recently needed front injector (PTV), the only things I did to activate that injector (after physically connecting the column) was to change column connection information in the instrument configuration window and method parameters adjustments in the injectors tab. All worked without any problems.

Do not think target injector can be changed in the sequence table.

[Bigbear]

The method is where the inlet is specified. If the method you ran in the sequence is for the front injector that is the injector used. You may need to build a method using the rear inlet.

[ogron]

Found the solution.

The method takes into account the single injection setting even though you are running a sequence. That's where the inlet is chosen - not in the method parameters (as far as I could determine).
So setting up a single injection with the chosen inlet. Then saving the method = success.