Replacing A Damaged Autosampler Needle - Thermo Scientific EASY-nLC 1200 Troubleshooting And Maintenance Manual

Replacing a Damaged Autosampler Needle

Replace the autosampler needle when it is bent or clogged.
Contents
• Removing the Damaged Autosampler Needle
• Installing a New Autosampler Needle
CAUTION Wear powder-free safety gloves when
working with solvents and handling the wetted
components of the instrument.
Replacing a damaged needle requires these tools and materials:
Tools
• #2 Phillips head screwdriver
•
Removing the Damaged Autosampler Needle
❖ To remove the autosampler needle
1. Using a #2 Phillips screwdriver, make a quarter-turn to loosen the
three captive screws that secure the panel to the right side the
EASY-nLC instrument, and then remove the panel.
2. Disconnect the autosampler needle from port 1 of valve S as
follows:
• Use the black knurled nut of the Viper fitting to unscrew it.
Figure 1. Valve S solvent line connections for the EASY-nLC 1200 system
Autosampler
needle
From the
mixing Tee
3. Move the z-axis needle holder to an accessible location within the
tray compartment.
4. Move the z-axis needle holder to position W1 as follows:
a. Press Home > Overview.
b. Press the autosampler icon.
Parts and materials
• Powder-free safety gloves
• ASC autosampler needle,
P/N LC302
Column Out line
• •
• • •
• •
From the
• • • • •
pressure sensor
• •
The Autosampler dialog box opens.
c. In the XYZ Robot area, press Go to Calibration.
The Tools page of the Autosampler view on the
Maintenance > Devices page opens.
Figure 2. Tools page of the Autosampler view on the Maintenance >
Devices page
d. In the Manipulator area, press Reset.
The z-axis needle holder moves to the W1 position.
5. Using a #2 Phillips screwdriver, loosen the three quarter-turn
screws that secure the panel to the left side of the EASY-nLC
instrument, and then remove the panel.
6. Remove the black needle holder from the slot in the panel that
separates the solvent system hardware from the autosampler
compartment. Removing the fitting requires some gentle
movement from both sides of the plate.
Figure 3. Removing the black needle holder from the slot in the panel
Black needle
holder
7. Loosen the nut that is connected to the z-axis needle holder by
turning it counterclockwise. Then carefully pull the autosampler
needle upward and away from the holder.
283
Slot in the
metal plate