Lovibond MD100 Mode D'emploi page 36

Methods
GB
CL 2
Tablet Powder
0.0.0
Tablet Powder
Zero
Test
CL 2
Tablet Powder
RESULT
Tablet Powder
Zero
!
Test
CL 2
Tablet Powder
RESULT
Tablet Powder
36
Chlorine with Vario Powder Pack
0.02 – 2.0 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.
Add the contents of one Vario Chlorine Free-DPD/ F10 Powder
Pack straight from the foil into the water sample.
Close the vial tightly with the cap and invert several times to mix the
contents (20 sec.).
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
Remove the vial from the sample chamber.
Rinse the vial and the cap several times and then fill the vial with
10 ml of water sample (Note 2 and 3).
Add the contents of one Vario Chlorine Total-DPD/ F10 Powder
Pack straight from the foil into the water sample.
Close the vial tightly with the cap and invert several times to mix the
contents (20 sec.).
Place the vial in the sample chamber making sure that the
are aligned.
Wait for a reaction period of 3 minutes.
(Countdown can be activated, see page 29)
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
marks
marks
MD100_3b 05/2011