LaMotte ColorQ Water Tester

[donaldm823]

inverting the vial 3 times is the correct procedure but you have to make sure the tablet is fully dissolved. Also high water temp will give a lower reading since the precipitate will be more soluable so having the sample at the correct temperature is important. We get many customers who leave a water sample in their car all day! (I TRY to tell them that this will affect the test results but some of them just don't care.) The first thing I always do is to take the temp of the sample and if it's above 80 degrees I stick it in our freezer at work for a few minutes to bring it down before I test it.

I second Waterbear's comments and add that based on my 2 months experience with the colorQ, you need to let the CYA sample sit for at least 5 minutes before reading or it will read low and get that sample below 78F. Also, if analyzing samples with chlorine higher than 4ppm, you need to let all of the samples with reagent added sit for a minimum of 2 minutes before reading with the meter or you may get erroneous readings on FC, TC, and pH reading. My CH always reads low as compared to Taylor, but it's still inside the +/- 40ppm window