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Hanna Checker Instructions for Nitrite ULR Standards:
- 1. Thoroughly wipe standard cuvette with HI731318 lint free cloth and only handle using top of cuvette. The cuvette wall must be dry and free of smudges.
- 2. At the C. 1 prompt, place A, HI758-11 standard cuvette into the holder of the Checker and press operations button.
- 3. At the C. 2 prompt, place B, HI758-11 standard cuvette into the holder of the Checker and press operations button.
- Acceptable results must be between 380 and 420 ppm at 25°C
Worked within its range! By Steve on 12/8/2016Steve would recommend this product to a friendIt tested as it was advertised. There is a expiration date on the vials, which I didn't expect but makes sense if the standard has to be color specific. They store in a black plastic case that fits the box they come in so they can be protected from light and not fade I guess. The alkalinity and calcium are the same besides there different colors.
Excellent By Donald on 9/18/2016Donald would recommend this product to a friendEasy to use.