Varian ProStar 340, Operation Manual

Page: 49 / 64

M
AINTENANCE AND
T
ROUBLESHOOTING
ProStar 340 UV/Vis Detector 23
CAUTION
Avoid scratching or putting fingerprints on the photodiode, flowcell windows, or the
monochromator lens. The photodiode surface should be cleaned with spectroscopic
grade methanol and lint-free lens paper.
4. Loosen the thumbscrew holding the tubing strain relief clamp
in place and gently pull the clamp towards you far enough to
disengage the tubing from the clamp.
5. Unscrew the two thumbscrews securing the cell holder
assembly in place and pull the cell holder assembly straight
back toward you to remove it.
6. Replacement cells are mounted pre-aligned in a cell holder
assembly. Installation reverses the removal process.
7. Slide the cell holder assembly onto the alignment dowels.
The inlet line should enter the bottom of the cell in order to
provide efficient bubble flushing. Securely fasten the cell
holder assembly with the two thumbscrews.
8. Slip the inlet and outlet tubes into the slots in the strain relief
clamp and tighten the thumbscrews holding the clamp in
place.
9. Replace the photodiode mount and fasten it securely with
the two thumbscrews.
10. Replace the cell cover (be careful not to pinch the cable or
the tubing) and fasten it securely with the thumbscrew.
11. Reconnect the inlet line to the column or connecting tubing
and reconnect the outlet tubing to the fraction collector,
back-pressure device, or appropriate waste reservoir.
12. Reconnect the power cord to the rear panel of the detector.