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METER DISPOSAL
Waste Electrical and Electronic Equipment (WEEE)
Natural resources were used in the production of this equipment. This
equipment may contain materials that are hazardous to health and the
environment. To avoid harm to the environment and natural resources, the use
of appropriate take-back systems is recommended. The crossed out wheeled
symbol on the meter encourages the use of these systems when disposing of
this equipment.
Take-back systems will allow the materials to be reused or recycled in a
way that will not harm the environment. For more information on approved
collection, reuse, and recycling systems contact local or regional waste
administration or recycling services.
SAMPLE DILUTION TECHNIQUES & VOLUMETRIC MEASUREMENTS
If a test result using the SMART3 Colorimeter gives an over range message
then the the sample must be diluted. The test should be repeated on the
diluted sample to obtain a reading which is in the concentration range for
the test.
Example:
Measure 1 mL of the water sample into a graduated cylinder. Add
distilled or deionized water until the cylinder is
fi
lled to the 10 mL line. The
sample has been diluted by one to nine, and the dilution factor is therefore
10. Perform the test procedure, then multiply the resulting concentration by
10 to obtain the test result.
The following table gives quick reference guidelines on dilutions of various
proportions. All dilutions are based on a 10 mL volume, so several dilutions
will require small volumes of the water sample.
Size of Sample
Deionized Water to
Bring Volume to 10 mL
Multiplication Factor
10 mL
0 mL
1
5 mL
5 mL
2
2.5 mL
7.5 mL
4
1 mL
9 mL
10
0.5 mL
9.5 mL
20
If the above glassware is not available, dilutions can be made with the
colorimeter tube. Fill the tube to the 10 mL line with the sample then transfer
it to another container. Add 10 mL volumes of demineralized water to the
