Tintometer Lovibond MD100 Instrucciones página 62

Methods
GB
Chlorine with Tablet
CL 6
0.01 – 6.0 mg/l Cl
a) free Chlorine
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 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.
Zero
Press the [ZERO/TEST] key.
Test
CL 6 The method symbol flashes for approx. 3 seconds.
RESULT
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.
! Zero
Test
(Countdown can be activated, see page 57)
CL 6
The method symbol flashes for approx. 3 seconds.
RESULT
The result is shown in the display in mg/l total Chlorine.
c) combined Chlorine
combined Chlorine = total Chlorine – free Chlorine
62
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MD100_7 12/2016