LaMotte DC1500 CHLORINE Manual Del Usuario página 7

10. Insert tube into chamber, close
lid and select Scan Sample.
Record result as Total Chlorine
(Monochloramine, Dichloramine,
and Nitrogen Trichloride) present
in the water sample.
11. Subtract free chlorine reading from total chlorine reading to obtain
concentration of combined chlorine.
12. Press
menu or make another menu selection.
Levels of chlorine about 4 mg/L will cause a bleaching effect on the DPD indicator,
and may give a false indication that no chlorine is present. If if is possible that the
chlorine concentration is greater than 4 mg/L, perform test on a diluted sample and
multiply the result by appropriate dilution factor.
CAUTION: DO NOT leave reacted samples in test tubes. Discard sample and
thoroughly rinse tubes. If allowed to remain, DPD wil stain tubes, signigicantly
impairing the operation of the colorimeter. If necessary, acid wash, and vigorously
clean glassware with test tube brush and detergent.
NOTE: For the most accurate results, samples over 4 ppm chlorine should be diluted
with chlorine demand free water and re-tested.
NOTE: The meter will remember the last scanned blank reading. It is not necessary
to scan a blank each time the test is performed. To use the previous blank reading,
instead of scanning a new one, scroll to Scan Sample and proceed. For the most
accurate results, the meter should be blanked before each test and the same tube
should be used for the blank and the reacted sample.
ANALYSIS - BROMINE PROCEDURE
1. Fill the Water Sample Collecting
Bottle (0688) with sample water.
2. Press and hold
colorimeter turns on.
to turn off the colorimeter or press
until
EXIT
Main Menu
Testing Menu
Editing Menu
12:00:00
7
to exit to a previous
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