5-2
3、 When the system is not in use, make sure that the tubing and the flow cell is
filled with clean distilled water (or DI water).
5.2 Weekly Maintenance
1、 Wash the waste bottle interior with clean water. Soak the bottle with
disinfector if necessary.
2、 If the instrument will not be in use for a long time. Detach the pump head
from the pump to elongate the service life of the pump tubing.
5.3 Irregular Maintenance
5.3.1 Cleaning Flow Cell
5.3.1.1 Low Background
Contamination of the flow cell or bubble in the flow cell might cause low background.
You can use the ethanol solution to clean the flow cell ( also applies for bubble in the
flow cell). The procedure is as follows:
1) Click Wash on the software to wash the tubing. After 5 seconds, click Stop.
2) Prepare about 5 ml ethanol solution in the tube. Put the aspiration tubing into
the tube and click Wash. After 5 seconds, click Stop. Wait for 10 seconds.
3) Wash with ethanol solution for 5 seconds again, and then wait for 10 seconds.
Wash the tubing with DI water for 10-20 seconds. The cleaning is completed.
4) Other recommended wash solutions include: 0.1N NaOH (KOH) solution (with
some surfactant); or, enzyme solution capable of decomposing the protein; or,
reagent used in chemistry analysis, capable of removing the protein, total
protein reagent (biuret) and etc.
5.3.1.2 Before switching to other tests
Before switching to other tests, it is recommended the flow cell be washed with
distilled water (or DI water). This is very necessary for tests which carryover might
take place, or samples whose concentration differs a lot. The cleaning should last for
no less than 5 seconds. The amount of distilled water (or DI water) should be around
1.5 ml. You can also use the wash solution specifically for chemistry analyzer to
wash first, then with the distilled water (or DI water).
5.3.1.3 Cleaning Exterior of the Flow Cell
If the optical surface of the flow cell is contaminated, use cloth soaked with certain
amount of absolute alcohol to clean it.
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