Silicone Oil Procedure; Applying Silicone Oil - Hach 2100N Instruction Manual

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SECTION 2,
continued

2.6 Silicone Oil Procedure

2.6.1 Applying Silicone Oil

Silicone Oil Procedure
1.
Thoroughly clean and
rinse the sample cell.
Note: See Section 2.5.1 on
page 22.
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Treat the outside of the cells with a thin coating of silicone oil to mask minor
imperfections and scratches that may contribute to light scattering. Use only Hach
silicone oil (Cat. No. 1269-36); it has the same refractive index as the glass
sample cell.
Apply a thin bead of silicone oil from the top to bottom of the cell—just enough to
coat the cell with a thin layer of oil. Using the oiling cloth provided, spread the oil
uniformly. Then, wipe off the excess so that only a thin coat of oil is left. The cell
should appear nearly dry with little or no visible oil. Applying excess oil may
attract dirt and contaminate the sample compartment of the instrument.
2.
Apply a thin bead of
silicone oil from the top to
bottom of the cell--just
enough to coat the cell with
a thin layer of oil.
Note: See Section 2.6.1.
3.
Spread the oil uniformly
using the oiling cloth
provided. Then, wipe off the
excess so that only a thin
coat of oil is left. The cell
should appear nearly dry
with little or no visible oil.
Note: Store the oiling cloth in a
plastic storage bag to keep the
cloth clean.
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