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3
Maintenance
Recommended Routine Maintenance
Recommended Routine Maintenance
Preventive Maintenance
26
Surveyor UV/Vis Plus Detector Hardware Manual
Table 6
lists recommendations for routine maintenance of the UV/Vis detector. Use the table
as a basis for developing your maintenance program in accordance with your company
practices.
Table 6. Recommended routine maintenance
Procedure
Cleaning external surfaces
Cleaning the flow cell
Lamp
Deuterium
replacement
(D2)
Tungsten
(W)
a
Good laboratory practices dictate flushing the flow cell with clean solvent after every use. This will greatly reduce
how often you need to clean it.
In addition to standard practices for laboratory cleanliness, Thermo Fisher Scientific
recommends the following preventive measures:
• Use only high-purity liquid in all "wetted surface" contact areas for the analysis, for
flushing, and for cleaning. Use only high-purity gases when drying the same areas.
• Thoroughly flush all plumbing (including the flow cell) after each use. Remember that
water is the recommended "last contact" liquid.
Keep the flow cell absolutely clean to maintain low-noise operation. Organic films and
residues are major causes of noise. Also consider the analytical solutions passing through
the flow cell. If they pose a possible contamination problem, flush the flow cell with water
or methanol. If this does not remove the contamination, clean the flow cell with a dilute
solution of nitric acid, followed by a water rinse.
• Thoroughly flush and clean all peripheral plumbing, pumps, and so on, before
connecting them to the flow cell.
• To avoid particulate contamination and fluid path blockage, maximize the use of
filtration.
• Avoid leaving buffers standing in the flow cell for long periods. Plan your use to minimize
standing time between runs.
Interval
As needed. See
"Cleaning Detector External Surfaces"
page
27.
a
As needed.
See
"Cleaning the Flow Cells"
Replace the deuterium lamp when the detector noise
reaches an unacceptable level. See
Deuterium Lamp"
on
page
The useful lamp lifetime is approximately 2000 hours.
Every 2500 hours or as required. See
Tungsten Lamp "
on
page
on
page
"Removing the
40.
"Removing the
42.
Thermo Scientific
on
35.
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