X84; Sample Dilution Techniques; General Information; X84; Packaging And Delivery; X84; General Precautions - LaMotte DC1500 CHLORINE Manual Del Usuario

stored with the caps on to prevent contamination.
After a tube has been filled and capped, it should be held by the cap and the
outside surface should be wiped with a clean, lint-free absorbent cloth until it
is dry and smudge-free. Handling the tube only by the cap will avoid problems
from fingerprints. Always set the clean tube aside on a clean surface that will not
contaminate the tube. It is imperative that the tubes and light chamber be clean
and dry. The outside of the tubes should be dried with a clean, lint-free cloth or
disposable wipe before they are placed in the meter chamber.
Tubes should be emptied and cleaned as soon as possible after reading a sample to
prevent deposition of particulates on the inside of the tubes.
Variability in the geometry of the glassware and technique is the predominate cause
of variability in results. Slight variations in wall thickness and the diameter of the
tubes may lead to slight variations in the test results. To eliminate this error the
tubes should be placed in the chamber with the same orientation each time.
Chambers which have been scratched through excessive use should be discarded
and replaced with a new one.

„ SAMPLE DILUTION TECHNIQUES

If a test result is out of the range of the meter, it must be diluted. The test should
then be repeated on the diluted sample. The following table gives quick reference
guidelines for dilutions of various proportions.
Amount of Sample
10 mL
5 mL
2.5 mL
1 mL
0.5 mL
All dilutions are based on a final volume of 10 mL, so several dilutions will require
small volumes of the water sample. Graduated pipets should be used for all
dilutions. If volumetric glassware is not available, dilutions can be made with the
colorimeter tube. Fill the tube to the 10 mL line with the sample and then transfer
it to another container. Add 10 mL volumes of deionized water to the container
and mix. Transfer 10 mL of the diluted sample to the colorimeter tube and follow
the test procedure. Repeat the dilution and testing procedures until the result falls
within the range of the calibration. Multiply the test result by the dilution factor.
For example, if 10 mL of the sample water is diluted with three 10 mL volumes of
deionized water, the dilution factor is four. The test result of the diluted sample
should be multiplied by four.

GENERAL INFORMATION

„ PACKAGING AND DELIVERY

Experienced packaging personnel at LaMotte Company assure adequate protection
against normal hazards encountered in transportation of shipments.
After the product leaves LaMotte Company, all responsibility for safe delivery is
assured by the transportation company. Damage claims must be filed immediately
with the transportation company to receive compensation for damaged goods.

„ GENERAL PRECAUTIONS

READ THE INSTRUCTION MANUAL BEFORE ATTEMPTING TO SET UP OR OPERATE THE
METER. Failure to do so could result in personal injury or damage to the meter. The
meter should not be used or stored in a wet or corrosive environment. Care should
be taken to prevent water from wet tubes from entering the meter chamber.
NEVER PUT WET TUBES IN THE METER.
Deionized Water to Bring
Final Volume to 10 mL
0 mL
5 mL
7.5 mL
9 mL
9.5 mL
21
Multiplication Factor
1
2
4
10
20