Agilent InfinityLab LC Series Vialsamplers User Manual 180
6 Troubleshooting and Diagnostics
Maintenance and Troubleshooting Tools
Using the Change Needle, Loop and Seat Function
The Change Needle, Loop, and Seat function grants easy access to the needle, the
sample loop, and the needle seat by moving the needle and the gripper arm into
predefined positions.
The execution of this function encompasses the following elementary steps
when the Agilent Lab Advisor Software is used:
1 Select Maintenance Positions from the list under Service & Diagnostics.
2 Under Task Selection, select Change, Needle, Loop and Seat and click Start.
3 Specify the type of the seat and loop capillary being installed in the Verify
capillary configuration window and click Continue.
4 Wait until the needle arm moves into the upper position.
5 Remove the safety cover and move the wash port safety flap to the service
position by slightly lifting it up and then flapping it to the left.
6 Confirm that the wash port safety flap is in the service position and click Next
to continue.
7 Wait until the needle moves down and stops ca. 2 mm above the needle seat.
8 Remove the sample loop (see “Exchange the Sample Loop Assembly” on
page 241) and the needle (see “Exchange the Needle Assembly” on page 229)
and click Next to continue.
9 Replace the needle seat (see “Exchange the Needle Seat Assembly” on
page 235) and click Next to continue.
10 Install the new needle (see “Exchange the Needle Assembly” on page 229)
and click Next to continue.
11 Reconnect the old sample loop or install a new one if needed (see “Exchange
the Sample Loop Assembly” on page 241) and click Next to continue.
12 Ensure that the needle tip is concentric with the seat. Use the Move Up and
Move Down buttons to move the needle closer to or further away from the
seat.
Sharp needle
Risk of injury due to moving needle.
Do not touch the tip of the needle.
Keep your fingers off the moving needle.
Wear safety goggles when handling an uncovered needle.
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