Chlorine Flashcards
Maximum holding time for a chlorine sample?
15 min from collection
After adding the Hach reagent, when does a Free Chlorine sample get analyzed?
Immediately, no more than 1 min.
After adding the Hach reagent, when does a Total Chlorine sample get analyzed?
Between 3 and 5 minutes
Calculation for Combined Chlorine
Total - Free
How often does the Chlorine meter get calibrated?
Every three months
What type of chlorine analysis do we do
Hach Pocket Colorimeter
Calculation for combined chlorine value
total - free = combined
What standards do we use for verification
Secondary Standards
Acceptance criteria for verification test
+/- 10% nominal
How to test in-line chlorine meter
Compare results of inline to bench result. Must be within 10% of each other
How often does in-line meter need to be calibrated
90 days, but not more than manufacturer recommendation
