Thermo Scientific Dionex UltiMate 3000 Series, Руководство по эксплуатации

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UltiMate 3000 Series:
NCS-3500RS and NCP-3200RS
Operating Instructions Page 165
Problem Probable Cause Remedial Action
Shifts in retention time for a
longer period
When changing solvents, the
previous solvent has not been
removed completely from the NC
pump.
Purge the NC pump
( → page 73).
Periods of inactivity (interruption
of operation) or changed
operating conditions
When pump operation was
interrupted (periods of
inactivity) or when the
operating conditions have
been changed, it can take
some time until the system
has reached the optimally
stable operating conditions
again.
Retention time outside the
expected range
The thermal flow sensors or
pressure transducers may have a
small drift.
ProFlow flow meter: Perform
a zero balance test for the
thermal flow sensors
( → page 172).
Classic flow meter:
Calibrate
the pressure transducers
( → page 172).
The solvent settings are incorrect. Check and correct the settings
for the solvents in
Chromeleon.
Solvents were pre-mixed and not
used for a longer period of time.
Purge the pump ( → page 72).
Pre-mixed solvents are too old. Use fresh eluent. Use fresh
and appropriate solvents (MS-
grade). Purge the pump
( → page 72).
High noise level, non-periodic
baseline fluctuation
The eluent is degraded or of poor
quality/purity.
Use fresh eluent. Use fresh
and appropriate solvents (MS-
grade).
For additional causes, refer to the
operating instructions for the
detector.
→ Detector manual
Pressure pulsation or
inconstant pressure
The solvent is not degassed
sufficiently.
Degas the solvent.
The solvent is degraded. Use fresh solvent.
There are pressure fluctuations
from the pump.
Purge the pump ( → page 72).
There are pressure fluctuations
from the loading pump.
Check the compression
values. Perform the remedial
actions ( → page 174).
There are air bubbles in the
system.
Purge the pump ( → page 72).