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Analysis methods
9.
Measuring tolerances
when determining the
ozone content:
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
> 2.0 ... 2.7 mg/l:
–
± 0.20 mg/l
> 2.7 ... 4.0 mg/l:
–
± 0.27 mg/l
ð Explanatory notes, see
Ä Further information
on page 29 .
40
pH value with tablet 6.5 ... 8.4
[MODE] key to select [PH] .
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.
Insert a
[PHENOL RED PHOTO‐
METER] tablet directly from the
foil into the water sample and
crush the tablet with a stirring
rod
3.
Fill the cuvette up to the 10 ml
marking with the water sample
4.
Close the cuvette using the cuv‐
ette lid
5.
Mix the contents of the cuvette
by tipping it back and forth, until
the tablets have dissolved
6.
Position the cuvette in the
sample chamber
ð Observe the correct posi‐
tioning of the cuvette.
7.
Press the key
[METHOD] flashes for
ð
approximately 3 seconds.
The result is output to the
display as a pH value.
[ZERO/TEST]
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