Calibration; X84; Chlorine Standards - LaMotte DC1500 Mode D'emploi

6. Insert tube into chamber, close lid and
select Scan Blank.
7. Remove tube from colorimeter. Add one
DPD #1 IG Tablet (6903A). Cap tube and
shake for 10 seconds. Invert slowly 5 times.
Solution will turn pink if bromine is present.
8. Immediately insert tube into chamber.
Close lid. Select Scan Sample. Record
result as Bromine.
NOTE: For the most accurate results, samples over 7 ppm bromine 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.

CALIBRATION

„ CHLORINE STANDARDS

The meter should be calibrated with free chlorine standards. The calibration should be done
with a distilled or deionized water blank and one chlorine standard of known concentration. The
concentration of the calibration standard should be similar to the expected concentration of the
sample that will be tested.
To perform a bromine calibration, prepare a bromine with a concentration that is equivenlent to
a chlorine dioxide standard that is within the range of the chlorine dioxide test. (1 ppm chlorine =
1.9 ppm bromine). Follow the procedure below but select the bromine test.
Chlorine Secondary Standards (Code 4140-03) are available to verify the performance of the
meter.
CHLORINE CALIBRATION
PROCEDURE
1. Press and briefly hold
meter on. The LaMotte logo screen will
appear for about 3 seconds and the Main
Menu will appear.
0.99
Scan Blank
Scan Sample
12:00:00
to turn the
Testing Menu
Editing Menu
12:00:00
7
016 Bromine T DPD
ppm
001/500
Main Menu
001/500