Which steps in the Hanna Calcium test would most likely lead to a lower limit error resulting in a reading of 200 ppm?
Last night I used my Hanna Calcium Checker for the first time. I attempted the test three times. For each test the result was the lower limit of 200 ppm which is obviously not correct. This is a more involved test that other Hanna Checkers, but I believe I did everything correctly each time. I believe this unit (which I bought used) may just be defective. Before making that conclusion, I would like to narrow the possible variables for error. I am curious which steps in the test process would lead to an unmeasurably low Calcium level. I will note, I used 0 TDS RO/DI water for the tests and not distilled water. I will redo the test with distilled water as well before giving up on the unit.
I have used several other Checkers from @Hanna Instruments with great success. I believe I may just have a bad, used colorimeter. If anyone has any insight I would be most appreciative. Thank you!
Last night I used my Hanna Calcium Checker for the first time. I attempted the test three times. For each test the result was the lower limit of 200 ppm which is obviously not correct. This is a more involved test that other Hanna Checkers, but I believe I did everything correctly each time. I believe this unit (which I bought used) may just be defective. Before making that conclusion, I would like to narrow the possible variables for error. I am curious which steps in the test process would lead to an unmeasurably low Calcium level. I will note, I used 0 TDS RO/DI water for the tests and not distilled water. I will redo the test with distilled water as well before giving up on the unit.
I have used several other Checkers from @Hanna Instruments with great success. I believe I may just have a bad, used colorimeter. If anyone has any insight I would be most appreciative. Thank you!