Methods; Chlorine With Tablet - Lovibond Tintometer MD200 Mode D'emploi

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CL 6
0.0.0
Zero
Test
CL 6
RESULT
!
Zero
Test
CL 6
RESULT
32

Chlorine with Tablet

0.01 – 6.0 mg/l
a) free 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 straight from the foil to the water sample
and crush the tablet 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 tablet is dissolved.
Place the vial in the sample chamber making sure that the
are aligned.
Press the [ZERO/TEST] key.
The method symbol flashes for approx. 3 seconds.
The result is shown in the display in mg/l free Chlorine.
b) total Chlorine
Add one DPD No. 3 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.
Place the vial in the sample chamber making sure that the
are aligned.
Wait for a reaction period of 2 minutes.
(Countdown can be activated, see page 31)
The method symbol flashes for approx. 3 seconds.
The result is shown in the display in mg/l total Chlorine.
c) combined Chlorine
combined Chlorine = total Chlorine – free Chlorine
Tolerances:
0 – 1 mg/l: ± 0.05 mg/l
> 1 – 2 mg/l: ± 0.10 mg/l
> 2 – 3 mg/l: ± 0.20 mg/l
> 3 – 4 mg/l: ± 0.30 mg/l
> 4 – 6 mg/l: ± 0.40 mg/l
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MD200_4 03/2014

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