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9.
Measuring tolerances
when determining the
chlorine dioxide content:
0 ... 1.9 mg/l: ± 0.1
–
mg/l
> 1.9 ... 3.8 mg/l:
–
± 0.2 mg/l
> 3.8 ... 5.7 mg/l:
–
± 0.4 mg/l
> 5.7 ... 7.6 mg/l:
–
± 0.6 mg/l
> 7.6 ... 11 mg/l: ± 0.8
–
mg/l
Ozone with tablet 0.01 ... 4 mg/l
[MODE] key to select [O3] .
Use the
1.
In a 24 mm cuvette add a 10 ml
water sample and carry out a
zero correction, see
Ä „Switching on and zero cor‐
rection" on page 13
2.
Remove the cuvette from the
sample chamber and empty the
cuvette down to the last few
drops
[DPD No. 1] tablet and
3.
Insert a
[DPD No. 3] tablet directly
a
from the foil into the water
sample and crush the tablets
using a stirring rod
4.
Fill the cuvette up to the 10 ml
marking with the water sample
5.
Close the cuvette using the cuv‐
ette lid
6.
Mix the contents of the cuvette
by tipping it back and forth, until
the tablets have dissolved
7.
Position the cuvette in the
sample chamber
ð Observe the correct posi‐
tioning of the cuvette.
8.
Press the key
[METHOD] flashes for
ð
approximately 3 seconds.
The result in mg/l of ozone
appears in the display.
Analysis methods
[ZERO/TEST]
39
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