LaMotte ColorQ Water Tester

[donaldm823]

Well, I just got off the phone with them and the instructions that are so clear in many places are completely wrong on one thing: The cap must be ON for the blanking test.

I will now be retesting and calling them back.

Salinda:
What did you resolve with the CH?? Is it still reading 50% of the Taylor?

I also got colorQ CH results lower than my Taylor titrant. Yesterday's reading was 199 with the colorQ and 280 with Taylor. I assumed the colorQ was correct.

LaMotte as part of their troubleshooting, sent me a 250ppm test standard for me to measure at home. The ColorQ read 230 and the Taylor read 290. They suspect interference from metal in my pool water although my copper measurement was no detectable copper. I do have high phosphate in the water and have used Jack's as treatment. Anyway, I gave up, and use the ColorQ CH measure as an approximation as it is a good trending device. All of the other analysis were accurate based on my other tester and the poolstore