Periodical Inspection - Hitachi CHROMASTER 5160 Instruction Manual

4.2.2 Periodical Inspection

No. Check Item
1 Drain tray
2 Solvent filter
3 The column
4 The seal of the
sample injector
5 The pump
Perform periodic maintenance and inspection according to Table
4-1. This prevents problems and ensures that your system
meets specifications.
Table 4-1 Periodical Maintenance and Inspection
Procedure
Check the drain tray for any
contamination or dirt to be cleaned
before analysis.
Wash the solvent filter with an ultrasonic
cleaner every 4 months.
Clean the solvent bottle every 2 days.
NOTE: Ensure that you are using the
correct solvent when refilling
the solvent bottle.
1) Do not stop the pump just after
completion of an analysis. The
pump must be kept running for 30
minutes after completion of an
analysis.
2) Do not introduce a sample
containing particles. Ensure that
the sample contains no particles or
impurities.
3) Periodically clean the column.
Components left in the column will
contaminate it.
NOTE: Refer to the instruction manual
of your column for the detailed
procedures of cleaning and
storage.
Replace it every year without fail.
1) The pump seal is a consumable
part. Be sure to replace the pump
every four months (640 hours).
2) The pump must be kept clean.
Clean the pump every month.
For cleaning, just pass isopropanol
through the pump for 30 minutes.
3) The pump does not function properly
when there are bubbles. Before
exchanging the solvent bottle or
adding solvent into the bottle, be
sure to turn off the pump.
Contamination or dirt in the drain
tray causes the leak sensor errors.
Intrusion of particles into the pump
causes increase and/or unstable
pressure and flow and composition
problems will occur.

Part of a complex sample is apt
to remain in the column.
This not only causes poor
stability or drift, but also shortens
the column life.

Particles present in the sample
plug the column filters.
Pressure will increases
abnormally. Impurities in the
sample also contaminate the
column. Impurities cause
erroneous data.

Occasionally clean the column
by injecting a large amount (1 to
3 mL) of solvent. The injection
of the solvent will dissolve the
sample residues. Cleaning of
the column insures good
separation and stability.
The worn seal causes liquid leakage
and poor reproducibility.

Deterioration of the seal causes
leaks. Leaks lead to poor
baseline stability and data
reproducibility. The net result of
leaks is degradation of reliability
in measurement.

Contamination of the check
valve, which is the critical part in
a pump, causes pressure
fluctuations, a failure in the
pressure rise or easy adhesion
of air bubbles.

Air bubbles in the pump cause
pressure to fluctuate or fail to
rise.
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Remarks