Lovibond PM 620, Инструкция по эксплуатации, Страница: 42 / 180

34 PM620_4c 07/2015
1.1 Methods
Chlorine HR, differentiated
determination
with Tablet
0.1 – 10 mg/l Cl
2
1. Fill a clean vial (24 mm Ø) with
10 ml of the water
sample, close tightly with the cap.
2. Place the vial in the sample chamber making sure that
the marks are aligned.
3. Press
ZERO
key.
4. Remove the vial from the sample chamber and
empty
it, leaving a few drops remaining in the vial
.
5. Add
one DPD No. 1 HR tablet
straight from the foil
and crush the tablet using a clean stirring rod.
6. Add water sample to the 10 ml mark.
7. Close the vial tightly with the cap and swirl several times
until the tablet is dissolved.
8. Place the vial in the sample chamber making sure that
the marks are aligned.
9. Press
TEST
key.
10. Remove the vial from the sample chamber.
11. Add one DPD No. 3 HR tablet straight from the foil
to the same water sample and crush the tablet using a
clean stirring rod.
3 0 1
prepare Zero
press ZERO
Zero accepted
prepare T1
press TEST