Calcium Hardness
Photometric test for Calcium Hardness in pool, spa, treated and natural water
Colour Change
Violet to Orange
Range:
0 - 500 mg/L CaCO₃
Technical Resource:
Calcium Hardness Test Method, Technical Information
Notes:

Strongly acidic or alkaline samples should be adjusted to within pH 4 to pH 10 prior to starting the test

01
Fill to the 10 mL line with sample.
02
Use this to "blank" the instrument. Place in cell holder and press Blank.
03
Prepare sample by adding a Calcicol No1 tablet. Crush and stir.
04
Then, add a Calcicol No2 tablet. Crush and stir.
05
Place in the cell holder and press Measure.
06
Allow timer to count down 2 minutes. The concentration of Calcium will then be displayed.
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