Hanna Instruments HI758-11 Calcium Checker Calibration Validation Kit

The Hanna Instruments Marine Line of Checkers come with a separate kit to assure you of the accuracy of your Checker over time.

This video will help give you direction on how to calibrate your Marine Checker using the Validation Kits.

[andrewmoossajee]

what happens if it is greater than the 400/420. i want to check my calcium checker as my readings are coming out higher than 570, yet my redsea kit sits at 470 or so

[markbradley]

How often do you recommend using the calibration kit? I assume when first bought it’s ‘good to go’?