Waters 2489, Operator'S Manual

Page: 147 / 234

Maintaining the flow cell 4-13
Inspecting, cleaning, and replacing damaged flow cell components
To inspect or clean the parts of the flow cell or to replace damaged parts of the
flow cell such as the lenses, exit window, or gaskets, follow this procedure and
the procedure in
“Rebuilding the flow cell” on page 4-13 .
Recommendation: Replace the clear plastic gaskets each time you inspect
and clean the flow cell.
To inspect and clean the flow cell:
1. Inspect each part of the removed flow cell for dirt.
2. Using ethanol or methanol, clean the contaminated part. Blow dry with
nitrogen.
3. Using the Flow Cell Rebuild Kit (part number WAS081346), replace any
flow cell parts that are scratched, burred, damaged, or do not come clean
using nitrogen.
4. Rebuild the flow cell by following the procedure in the next section.
Rebuilding the flow cell
After cleaning or replacing other flow cell parts, rebuild the flow cell.
To rebuild the flow cell:
1. Using the plastic tweezers, remove the new clear plastic gaskets from
the Flow Cell Rebuild Kit (part number WAS081346), and inspect them
for dirt.
2. Drop one clear plastic gasket into the groove at the bottom of the
entrance lens end of the flow cell body.
3. Inspect the entrance lens and use nitrogen to blow dust off, if necessary.
4. Using plastic tweezers, drop the entrance lens into the flow cell body,
curved side facing up.
Caution: To prevent contamination, use powder-free finger cots or
gloves when disassembling, inspecting, cleaning, or replacing parts
within the Waters TaperSlit Flow Cell or when removing or
replacing the flow cell within its assembly. Work on a clean flat
surface, such as a nonparticulating cloth or similar surface.