Tintometer Lovibond MD 200 Instrucciones página 27

Methods
GB
Ozone in absence of Chlorine with Tablet
O3
0.02 – 2 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").
Remove the vial from the sample chamber and empty it, leaving a
few drops remaining in the vial.
Add one DPD No. 1 tablet and one DPD No. 3 tablet straight
from the foil to the water sample and crush the tablets using a clean
stirring rod.
Add the water sample to the 10 ml mark.
Close the vial tightly with the cap and swirl gently several times until
the tablets are dissolved.
Place the vial in the sample chamber making sure that the marks
are aligned.
Wait for a reaction period of 2 minutes.
! Zero
Test (Countdown can be activated, see page 25)
O3
The method symbol flashes for approx. 3 seconds.
RESULT
The result is shown in the display in mg/l Ozone.
Tolerances:
0 – 0,67 mg/l: ± 0,03 mg/l
> 0,67 – 1,3 mg/l: ± 0,07 mg/l
> 1,3 – 2,0 mg/l: ± 0,13 mg/l
27
MD200_4 03/2018