The Vialsampler processor continuously monitors the movements of the vialsampler components during the sampling sequence. The processor defines specific time windows and mechanical ranges for each movement. If a specific step of the sampling sequence can’t be completed successfully, an error message is generated.
During the sampling sequence, the solvent bypasses the vialsampler via the injection valve. The gripper arm selects the sample vial, either from a static sample rack, or from external vial positions. The gripper arm places the sample vial below the injection needle. The required volume of sample is drawn into the sample loop by the metering device. Sample is applied to the column when the injection valve returns to the mainpass (main path) position at the end of the sampling sequence.
The sampling sequence occurs in the following order:
The injection valve switches to the bypass position.
The piston of the metering device moves to the initialization position.
The gripper arm moves from the home position, and selects the vial. At the same time, the needle lifts out of the seat.
The gripper moves into the needle station and stops in the draw position. Only if automated needle wash is selected
The needle lowers into the vial.
The metering device draws the defined sample volume.
The needle lifts out of the vial.
The gripper arm moves out slightly and stops in the wash positionOnly if automated needle wash is selected.
The needle moves downwards and dips into the wash well of the wash port. Simultaneously the peristaltic pump delivers the flush solvent.Only if automated needle wash is selected
The needle moves back.Only if automated needle wash is selected
The gripper arm moves out of the needle station and the wash port snaps back in position.
The gripper arm replaces the vial, and returns to the home position. Simultaneously, the needle lowers into the seat.
The injection valve switches to the mainpass (main path) position.
base-id: 3714620555
id: 3714620555