Hach-Lange 2100 N Laboratory Turbidimeter User Manual - Manual (Page 19)

Clean the sample cell
C A U T I O N
Chemical exposure hazard. Obey laboratory safety procedures and
wear all of the personal protective equipment appropriate to the
chemicals that are handled. Refer to the current material safety data
sheets (MSDS) for safety protocols.
N O T I C E
Do not air dry the sample cells. Always store the sample cells with caps on to
prevent the cells from drying. For storage, fill the sample cell with distilled or
demineralized water.
1. Clean the internal and external surfaces of the sample cell and cap
with a laboratory glass cleaning detergent.
2. Fully rinse the sample cell many times with distilled or deionized
water.
3. Clean the internal and external surfaces of the sample cell and cap
with 1:1 hydrochloric acid.
4. Fully rinse the sample cell many times with distilled or deionized
water.
Note: If the sample cell will be used to measure low range turbidity samples or
dilution water, rinse with dilution water (not distilled or deionized water). Refer
to
Prepare dilution water on page 21.
5. Dry the external surface of the sample cell with a soft, lint-free cloth.
6. Fill the sample cell with distilled or deionized water.
Note: If the sample cell will be used to measure low range turbidity samples or
dilution water, fill the sample cell with dilution water (not distilled or deionized
water).
7. Immediately put the cap on the sample cell.
Note: Hold the sample cell by the top only to minimize dirt and fingerprints.
English 17