1220 Infinity II LC System User Manual 155
Test Functions and Calibration
9
Autosampler
Arm Position
Injector Steps
Each movement of the sampling sequence can be done under manual control.
This is useful during troubleshooting, where close observation of each of the
sampling steps is required to confirm a specific failure mode or verify
successful completion of a repair.
Each injector step command actually consists of a series of individual
commands that move the autosampler components to predefined positions,
enabling the specific step to be done.
Start moves the gripper to the front of the
sample-tray area.
End repositions the gripper at the home position.
Move Arm Home Moves the gripper arm to its home position for
better access and exchange of trays.
Park Arm Secures the gripper arm to the park position
behind the sampling unit. Before parking the
gripper arm, ensure there is no vial in the
gripper.
Table 33 Injector step commands
Step Action Comments
Valve Bypass Switches injection valve to the bypass
position.
Piston Home Moves the piston to the home
position.
Needle Up Lifts the needle arm to the upper
position.
Command also switches the
valve to bypass if it is not
already in that position.
Vial to Seat Moves the selected vial to the seat
position.
Command also lifts the
needle to the upper position.