Hach 2100Q Bedienungsanleitung Seite 11

Maintenance
C A U T I O N
Multiple hazards. Only qualified personnel must conduct the tasks
described in this section of the document.
Clean the meter
The meter is designed to be maintenance-free and does not require
regular cleaning for normal operation. Exterior surfaces of the meter may
be cleaned as necessary.
Note: Do not clean the meter with solvents to avoid damaging the material.
1. Clean the meter with a dust- and lint-free dry or slightly damp cloth. A
mild soap solution can also be used for liposoluble contamination.
Apply silicone oil to a sample cell
Sample cells and caps must be extremely clean and free from significant
scratches. Apply a thin coating of silicone oil on the outside of the
sample cells to mask minor imperfections and scratches that may
contribute to light scattering.
Note: Use only the provided silicone oil. This silicone oil has the same refractive
index as the sample cell glass.
1. Clean the inside and 2. Apply a small bead
outside of the cells and of silicone oil from the
caps by washing with a top to the bottom of the
laboratory glass cell.
cleaning detergent.
Follow with multiple
rinses with distilled or
demineralized water.
Store the sample cells
N O T I C E
Do not air dry the sample cells.
Note: Always store the sample cells with caps on to prevent the cells from drying.
1. Fill the sample cells with distilled or demineralized water.
2. Cap and store the sample cells.
3. Wipe the outside of the sample cells dry with the a soft cloth.
3. Use the provided
oiling cloth to spread
the oil uniformly. Wipe
off the excess so that
only a thin coat of oil is
left. Make sure that the
sample cell is almost
dry with little or no
visible oil.
Note: Store the oiling
cloth in a plastic
storage bag to keep the
cloth clean.
English 11