LaMotte SMART 2 - Manual (Page 242)

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 89 Sulfate-HR)
from TESTING MENU.
5. Scroll to and select 89 Sulfate-HR 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. Use the 0.1 g spoon (0699) to add one
measure of *Sulfate Reagent (V-6277). Cap and shake until powder
dissolves. A white precipitate will develop if sulfates are present. Wait 5
minutes.
9. Mix tube again. Insert tube into chamber, close lid and select SCAN
SAMPLE
. Record result.
10. Press
OFF button to turn colorimeter off or press EXIT button to exit to a
previous menu or make another menu selection.
þ NOTE: If the sulfate concentration of the test sample is greater than 100 ppm,
it is recommended that a dilution be made with deionized water and the results
multiplied by the dilution factor.
A white film is deposited on the inside of test tubes as a result of the sulfate
test. Thoroughly clean and rinse test tubes after each test.
For the most accurate results, samples and reactions should be at 25±4°C.
Sulfate–HR 2/2 Smart2 TEST PROCEDURES 2.04