LaMotte COD Plus Colorimeter 1922-EX2 - Manual (Page 85)

PROCEDURE
1. Press and hold ON button until colorimeter turns on.
2. Press ENTER to start.
3. Press ENTER to select TESTING MENU.
4. Select ALL TESTS (or another sequence containing 12 Cyanuric)
from TESTING MENU.
5. Scroll to and select 12 Cyanuric from menu.
6. Rinse a clean tube (0290) with sample water. Fill to the 10 mL line with
sample.
7. Insert tube into chamber, close lid and select SCAN BLANK.
8. Remove tube from colorimeter and pour out water. Use a graduated
cylinder or similar to measure 5 mL of sample water and pour into
colorimeter tube.
9. Use the 5 mL syringe (0807) to add 5 mL of *Cyanuric Acid Test Solution
(4856). Cap and mix thoroughly. A precipitate will form if cyanuric acid is
present. Wait 1 minute.
NOTE: This reagent bottle has a special fitting which enables the syringe
to be inserted into the top of the bottle. With syringe in place, invert
bottle and withdraw syringe plunger until 5 mL of reagent is contained in
the syringe barrel. Remove syringe from reagent bottle and depress plunger
to dispense into the tube.
10. At end of 1 minute waiting period, mix thoroughly, insert tube into
chamber, close lid and select SCAN SAMPLE. Record result.
11. Press
OFF button to turn colorimeter off or press EXIT button to exit to a
previous menu or make another menu selection.
NOTE: For the most accurate results, the sample and reagents should be at
25±4°C.
CYANURIC ACID 2/2 COD PLUS TEST PROCEDURES 6/02