Lovibond Maxi Direct, Instruction Manual, Page: 88 / 268

86 MaxiDirect_2c 03/2010
1.1 Methods
Hardness, Calcium
with Tablet
50 – 900 mg/l CaCO
3
1. Fill a clean vial (24 mm Ø) with
10 ml deionised water
.
2. Add one CALCHECK tablet straight from the foil to
the deionised water and crush the tablet using a clean
stirring rod.
3. Close the vial tightly with the cap and swirl several times
until the tablet is dissolved.
4. Place the vial in the sample chamber making sure that
the marks are aligned.
5. Press ZERO key.
Wait for a reaction period of 2 minutes .
After the reaction period is finished the measurement
starts automatically.
6. Remove the vial from the sample chamber.
7. Add 2 ml of the water sample to the prepared vial.
Caution: Vial is filled up to the top! (Note 4)
8. Close the vial tightly with the cap and swirl several times
(5x) to mix the contents.
9. Place the vial in the sample chamber making sure that
the marks are aligned.
10. Press TEST key.
The result is shown in the display as Calcium Hardness.
Zero accepted
prepare Test
press TEST
prepare Zero
press ZERO
Countdown
2:00
9
0
1