49
WT.050.311.000.DM.IM.0119
P7
Advanced
Methods
English
Ozone with Tablet
0.02 – 2 mg/l O
3
a) in absence of Chlorine
Fill a clean vial (24 mm Ø) with
10 ml of the water sample
and
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 and crush the tablets using a clean stirring rod.
Add water sample to the 10 ml mark.
Close the vial tightly with the cap and swirl 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.
(Countdown can be activated, see page 37)
The method symbol flashes for approx. 3 seconds.
The result is shown in the display as Ozone.
b) in presence of Chlorine (Chlorine with Ozone)
see method: Chlorine with Tablet, section e, Chlorine with 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
Notes:
see page 38
0.0.0
O3
!
Zero
Test
O3
RESULT
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