Tintometer Lovibond MD 110 Mode D'emploi page 48

Methods
GB
Hardness, Calcium with Tablet
CAH
0 – 500 mg/l
Fill a clean vial (24 mm Ø) with 10 ml of the water sample and
0.0.0
perform zero calibration (see "Operation").
Add one CALCIO H No. 1 tablet straight from the foil to the water
sample and crush the tablet using a clean stirring rod. Dissolve the
tablet completely.
Add one CALCIO H No. 2 tablet straight from the foil to the same
water sample and crush the tablet using a clean stirring rod.
Close the vial tightly with the cap and swirl gently several times until
the tablet is dissolved completely.
Place the vial in the sample chamber making sure that the marks
are aligned.
Wait for a reaction period of 2 minutes.
Zero
!
(Countdown can be activated, see page 35)
Test
CAH The method symbol flashes for approx. 3 seconds.
RESULT The result is shown in the display in mg/l CaCO .
3
Tolerances:
0 – 250 mg/l: ± 5% (full scale)
251 – 500 mg/l: ± 10% (full scale)
48 MD110_2 03/2018