Easily calibrate and test proper functionality of your Hanna Checker HI772 Alkalinity (DKH) for fresh and marine water.

• Contains Standard A and Standard B
• Follow instructions in packaging
• Includes certificate of analysis
• Reusaable with long shelf life

Hanna Checker Instructions for Marine Alkalinity Standards:

1. Thoroughly wipe standard cuvette with HI731318 lint free cloth and only handle using top of a cuvette. The cuvette wall must be dry and free of smudges.

2. At the C.1 prompt, place A, HI772-11 standard cuvette into the holder of the Checker and press the button.

3. At the C.2 prompt, place B, HI772-11 standard cuvette into the holder of the Checker and press the button.

4. Compare readings to the certificate of analysis for calibration reference.