Commands and Tips for Third Party Devices
Agilent 7683 Autosampler

In addition to  General Device Commands, the following commands and properties are available for the rear and front injectors under Sampler (please note that the display Filter level determines which commands and properties are displayed):

 

Property

Description

Depth

Position of the needle in the vial. The default position is about 3.6 mm from the bottom of the vial. The default position is the reference of all other positions.

DualInject

Turns the dual injection on and off. When dual injection is activated, an injection will be performed on both injectors simultaneously.

Mode

Indicates the injection mode as specified in the installation.

Post_a

Indicates how often the syringe is rinsed with solvent from the solvent reservoir A after the injection.

Post_b

Indicates how often the syringe is rinsed with solvent from the solvent reservoir B after the injection.

PostDwell

Time that the needle remains in the inlet after the injection before it is withdrawn.

Pre_a

Indicates how often the syringe is rinsed with solvent from the solvent reservoir A prior to the injection.

Pre_b

Indicates how often the syringe is rinsed with solvent from the solvent reservoir B prior to the injection.

PreDwell

Time that the needle remains in the inlet before the piston moves to inject the sample.If this value is nonzero, one injector stop of air is drawn (except at maximum injection volume, i.e., five stops).

Present

Indicates whether the device is connected to the data system and under computer control.

Prewash

Indicates how often the syringe is rinsed with the sample prior to the injection.

Pumps

Indicates the how often the pressure plunger of the syringe is moved up and down while the needle is in the sample. This is to expel gas bubbles and to enhance the reproducibility.

Speed

Average piston speed (only during injection).
Slow: approx. 5 µl/s (using a 10µl syringe) and

Fast: approx. 100 µl/s (using a 10µl syringe).

StopInject

Stops the running injection.

Note:
This command has the same effect as pressing the STOP button of the injector.

Syringe

Indicates the syringe type as specified in the installation.

Note: Other values in the given range are accepted.

Agilent provides syringes in the listed sizes.

 Tip:

The device does not automatically detect a change of syringe volume. To change the syringe volume, enter the desired value in the corresponding field on the panel to ensure that the correct volumes are injected.

Viscosity

Number of seconds the pressure plunger of the syringe pauses after the pump and injection strokes. This pause allows viscous samples to flow into the vacuum created in the syringe.