Table 4–2: Solvent manager maintenance procedures (continued)
Maintenance procedure Frequency
Replace the plunger and seals As part of the annual scheduled routine
maintenance and thereafter, as needed. The
typical failure modes are as follows:
• Late eluting peaks are exhibited after a
dynamic leak test is performed where the
leak rate is above the acceptable limit.
• Flow from the seal wash effluent during
the high-pressure dynamic leak test.
• The solvent manager exhibits low or
erratic flow rate or pressure pulsations.
Replace the vent valve cartridge As needed.
Clean the module’s exterior with a soft, lint-
free cloth, or paper dampened with water
Perform as part of annual routine scheduled
maintenance and when solvent or dust
accumulates.
Table 4–3: µSM-FL maintenance procedures
Maintenance procedure Frequency
Clean the module with a soft, lint-free cloth,
or paper dampened with water
Perform as part of annual routine scheduled
maintenance and when solvent or dust
accumulates.
Replace the needle seal As part of the annual scheduled routine
maintenance and thereafter, as needed. The
typical failure modes are as follows:
• The needle seal readiness test fails.
• Peaks do not appear on your
chromatogram.
• Peak areas are lower than expected.
Replace the sample needle When the needle breaks, when the error
message Drawing sample rate
excessive <value> appears, or the
needle seal readiness test fails.
November 26, 2019, 715003588 Revision C
Page 62
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